JP7573275B2

JP7573275B2 - Adhesive tape

Info

Publication number: JP7573275B2
Application number: JP2021051750A
Authority: JP
Inventors: 利一荒木; 進吾吉富
Original assignee: ARAM CORP
Current assignee: ARAM CORP
Priority date: 2021-03-25
Filing date: 2021-03-25
Publication date: 2024-10-25
Anticipated expiration: 2041-03-25
Also published as: JP2022149541A

Description

本発明は、粘着テープに関する。 The present invention relates to an adhesive tape.

たとえば絆創膏などに用いられる粘着テープは、粘着性および柔軟性を有するために、たとえば人体の皮膚などの貼付対象に容易に貼り付けることができるとともに、貼付対象の動きに追従して容易に変形するので、貼付対象に対する貼付状態を比較的に良好に維持しやすい。ところが、そのような粘着テープであっても、長時間の使用などによって粘着力が低下して、貼付対象から剥がれて脱落してしまうことがある。粘着テープは、たとえば、食品の製造や加工などを行なう食品工場において用いられると、貼付対象から脱落した場合に、食品に異物として混入する可能性がある。 For example, adhesive tapes used in bandages and the like are adhesive and flexible, so they can be easily attached to the target, such as the skin of the human body, and they easily deform to follow the movements of the target, making it relatively easy to maintain a good adhesion to the target. However, even such adhesive tapes can lose their adhesive strength after long periods of use, causing them to peel off and fall off from the target. For example, if adhesive tape is used in a food factory that manufactures and processes food, and falls off from the target, it may become a foreign object and contaminate the food.

食品の製造や加工などを行なう食品工場において、粘着テープなどの異物が食品に混入することは、衛生上の問題から、回避すべき重要な課題である。したがって、食品工場においては、まず、食品に異物が混入するのを回避することが求められるが、たとえ食品に異物が混入したとしても、食品の出荷前に異物を検出することができれば、異物が混入した食品の流通を回避することができる。そのような観点から、貼付対象から脱落して食品に混入したとしても容易に検出することができるように、たとえば特許文献１には、タングステン含有粉が含まれる粘着テープが開示されている。特許文献１の粘着テープは、食品に混入したとしても、タングステン含有粉がＸ線検査装置に反応することを利用して、Ｘ線検査装置により検知することができる。 In food factories where food is manufactured and processed, contamination of food with foreign objects such as adhesive tape is an important issue that must be avoided due to hygiene issues. Therefore, in food factories, it is first required to prevent foreign objects from contaminating food. Even if food is contaminated with a foreign object, if the foreign object can be detected before the food is shipped, it is possible to prevent the food containing the foreign object from being distributed. From this perspective, for example, Patent Document 1 discloses an adhesive tape containing tungsten-containing powder so that it can be easily detected even if it falls off the object to which it is attached and is contaminated into food. The adhesive tape of Patent Document 1 can be detected by an X-ray inspection device by utilizing the reaction of the tungsten-containing powder to the X-ray inspection device even if it is contaminated into food.

特開２０２０－１０３８６５号公報JP 2020-103865 A

特許文献１には、さまざまな形態でタングステン含有粉を粘着テープに含有させることが可能であることが記載されている。たとえば、ある粘着テープでは、タングステン含有粉が含まれるタングステン含有層が基材の表面の全面に設けられている。この場合、基材全面がタングステン含有層で覆われることで、粘着テープの強度は増加する一方で、基材が有する柔軟性や通気性が損なわれてしまう可能性がある。また、別の粘着テープでは、タングステン含有粉が含まれるタングステン含有層が基材の表面に分散されている。この場合、基材表面が部分的にタングステン含有層に覆われることなく露出されることで、基材が有する柔軟性や通気性の低下が抑制される。しかし、基材の端縁にまでタングステン含有層が及んでいないので、基材の端縁が欠損する可能性がある。特に、基材が布地により形成されている場合には、端縁から糸が解れる可能性がある。 Patent Document 1 describes that it is possible to incorporate tungsten-containing powder into an adhesive tape in various forms. For example, in one adhesive tape, a tungsten-containing layer containing tungsten-containing powder is provided on the entire surface of the substrate. In this case, the entire substrate is covered with the tungsten-containing layer, which increases the strength of the adhesive tape, but may impair the flexibility and breathability of the substrate. In another adhesive tape, a tungsten-containing layer containing tungsten-containing powder is dispersed on the surface of the substrate. In this case, the substrate surface is partially exposed without being covered by the tungsten-containing layer, which suppresses the decrease in the flexibility and breathability of the substrate. However, since the tungsten-containing layer does not extend to the edge of the substrate, there is a possibility that the edge of the substrate may be damaged. In particular, when the substrate is made of fabric, there is a possibility that threads may come loose from the edge.

本発明は、上述した問題に鑑みなされたもので、検知装置で検知可能であり、基材が有する柔軟性および通気性の低下を抑制しつつ、基材の端縁の欠損が抑制された粘着テープを提供することを目的とする。 The present invention has been made in consideration of the above-mentioned problems, and aims to provide an adhesive tape that can be detected by a detection device, suppresses a decrease in the flexibility and breathability of the substrate, and suppresses damage to the edges of the substrate.

本発明の粘着テープは、柔軟性および通気性を有するシート状基材と、前記シート状基材の表面に設けられる粘着剤層と、前記シート状基材の表面に設けられる複数の検知対象膜とを備える粘着テープであって、前記シート状基材が、第１の方向に沿って延びる第１の端縁を有し、前記複数の検知対象膜が、前記シート状基材の表面上で互いに間隔を空けて分散して配置され、前記検知対象膜が、結合材および検知対象材を含み、前記複数の検知対象膜のうち少なくとも１つが、前記シート状基材の前記第１の端縁に隣接して配置されていることを特徴とする。 The adhesive tape of the present invention is an adhesive tape comprising a flexible and breathable sheet-like substrate, an adhesive layer provided on the surface of the sheet-like substrate, and a plurality of detection target films provided on the surface of the sheet-like substrate, characterized in that the sheet-like substrate has a first edge extending along a first direction, the plurality of detection target films are arranged in a dispersed manner at intervals on the surface of the sheet-like substrate, the detection target film contains a binder and a detection target material, and at least one of the plurality of detection target films is arranged adjacent to the first edge of the sheet-like substrate.

また、前記第１の方向における前記シート状基材の略全長に亘る、前記第１の方向に沿った任意の線上に、前記複数の検知対象膜のうち少なくとも１つが存在するように、前記複数の検知対象膜が前記シート状基材の表面上に配置されていることが好ましい。 It is also preferable that the multiple detection target membranes are arranged on the surface of the sheet-like substrate such that at least one of the multiple detection target membranes is present on any line along the first direction over substantially the entire length of the sheet-like substrate in the first direction.

また、前記シート状基材が、前記第１の方向に略直交する第２の方向に沿って延びる第２の端縁を有し、前記複数の検知対象膜のうち少なくとも１つが、前記シート状基材の前記第２の端縁に隣接して配置されていることが好ましい。 It is also preferable that the sheet-like substrate has a second edge extending along a second direction substantially perpendicular to the first direction, and at least one of the plurality of detection target membranes is disposed adjacent to the second edge of the sheet-like substrate.

また、前記第１の方向に略直交する第２の方向における前記シート状基材の略全長に亘る、前記第２の方向に沿った任意の線上に、前記複数の検知対象膜のうち少なくとも１つが存在するように、前記複数の検知対象膜が前記シート状基材の表面上に配置されていることが好ましい。 It is also preferable that the multiple detection target membranes are arranged on the surface of the sheet-like substrate such that at least one of the multiple detection target membranes is present on any line along the second direction that spans substantially the entire length of the sheet-like substrate in the second direction that is substantially perpendicular to the first direction.

また、前記複数の検知対象膜は、前記第２の方向に沿って複数の検知対象膜が互いに第１の間隙を挟んで並んで配置される少なくとも１つの第１の列と、前記第２の方向に沿って複数の検知対象膜が互いに第２の間隙を挟んで並んで配置される少なくとも１つの第２の列とを備え、前記第１および第２の列は、前記第１の方向に沿って互いに間隔を空けて交互に配列され、前記第１および第２の列は、前記第１の列における全ての前記第１の間隙の前記第１の方向の延長線上に前記第２の列における検知対象膜が存在し、前記第２の列における全ての前記第２の間隙の前記第１の方向の延長線上に前記第１の列における検知対象膜が存在するように、前記第２の方向で互いに対してオフセットされて配置されていることが好ましい。 The plurality of detection target films include at least one first row in which the plurality of detection target films are arranged side by side with a first gap between them along the second direction, and at least one second row in which the plurality of detection target films are arranged side by side with a second gap between them along the second direction, and the first and second rows are alternately arranged at intervals along the first direction, and the first and second rows are preferably offset from each other in the second direction such that the detection target films in the second row are located on the extensions of all the first gaps in the first row in the first direction, and the detection target films in the first row are located on the extensions of all the second gaps in the second row in the first direction.

また、前記複数の検知対象膜は、前記第１の方向Ｘ１に対して傾斜する第３の方向に沿って複数の検知対象膜が互いに第３の間隙を挟んで並んで配置される少なくとも１つの第３の列と、前記第３の方向に沿って複数の検知対象膜が互いに第４の間隙を挟んで並んで配置される少なくとも１つの第４の列とを備え、前記第３および第４の列は、前記第３の方向に略直交する第４の方向に沿って互いに間隔を空けて交互に配列され、前記第３および第４の列は、前記第３の列における全ての前記第３の間隙の前記第４の方向の延長線上に前記第４の列における検知対象膜が存在し、前記第４の列における全ての前記第４の間隙の前記第４の方向の延長線上に前記第３の列における検知対象膜が存在するように、前記第３の方向で互いに対してオフセットされて配置されており、前記第１の方向に対する前記第３の方向の角度は、前記第１の方向における前記シート状基材の略全長に亘る、前記第１の方向に沿った任意の線上に、前記複数の検知対象膜のうち少なくとも１つが存在し、前記第１の方向に略直交する第２の方向における前記シート状基材の略全長に亘る、前記第２の方向に沿った任意の線上に、前記複数の検知対象膜のうち少なくとも１つが存在するように、画定されることが好ましい。 The plurality of detection target films include at least one third row in which the plurality of detection target films are arranged side by side with a third gap between them along a third direction inclined with respect to the first direction X1, and at least one fourth row in which the plurality of detection target films are arranged side by side with a fourth gap between them along the third direction, the third and fourth rows are alternately arranged at intervals from each other along a fourth direction substantially perpendicular to the third direction, the third and fourth rows are arranged such that the detection target films in the fourth row are present on the extension line in the fourth direction of all the third gaps in the third row, and the detection target films in the fourth row are arranged on the extension line in the fourth direction of all the third gaps in the third row. The detection target membranes in the third row are offset from each other in the third direction so that the detection target membranes in the third row are located on the extension line of all of the fourth gaps in the fourth direction, and the angle of the third direction with respect to the first direction is preferably defined so that at least one of the detection target membranes is located on any line along the first direction that spans substantially the entire length of the sheet-like substrate in the first direction, and at least one of the detection target membranes is located on any line along the second direction that spans substantially the entire length of the sheet-like substrate in a second direction that is substantially perpendicular to the first direction.

また、前記シート状基材が、前記第１の方向に延びる経糸と、前記第１の方向に略直交する第２の方向に延びる緯糸とで織成される織物であることが好ましい。 It is also preferable that the sheet-like substrate is a woven fabric made of warp threads extending in the first direction and weft threads extending in a second direction substantially perpendicular to the first direction.

また、前記結合材が、熱可塑性樹脂であり、前記検知対象材が、磁性粉またはタングステン粉であることが好ましい。 It is also preferable that the binder is a thermoplastic resin and the detection target material is a magnetic powder or tungsten powder.

本発明によれば、検知装置で検知可能であり、基材が有する柔軟性および通気性の低下を抑制しつつ、基材の端縁の欠損が抑制された粘着テープを提供することができる。 The present invention provides an adhesive tape that can be detected by a detection device, suppresses loss of the edge of the substrate while suppressing a decrease in the flexibility and breathability of the substrate.

本発明の第１実施形態に係る粘着テープの斜視図である。1 is a perspective view of an adhesive tape according to a first embodiment of the present invention; 図１の粘着テープの一部の上面図である。FIG. 2 is a top view of a portion of the adhesive tape of FIG. 1 . 図２の粘着テープのＩＩＩ－ＩＩＩ線断面図である。3 is a cross-sectional view of the adhesive tape of FIG. 2 taken along line III-III. 本発明の第２実施形態に係る粘着テープの一部の上面図である。FIG. 4 is a top view of a portion of an adhesive tape according to a second embodiment of the present invention.

以下、添付図面を参照して、本発明のいくつかの実施形態に係る粘着テープを説明する。図１～図３は、本発明の第１実施形態に係る粘着テープ１を示し、図４は、本発明の第２実施形態に係る粘着テープ１０を示す。これらの図では、同一の機能を有する要素には同一の符号が付されている。なお、これらの図面とともに以下で説明する実施形態はあくまで例示に過ぎず、本発明の粘着テープは以下の例に限定されることはない。 Hereinafter, adhesive tapes according to several embodiments of the present invention will be described with reference to the attached drawings. Figures 1 to 3 show an adhesive tape 1 according to a first embodiment of the present invention, and Figure 4 shows an adhesive tape 10 according to a second embodiment of the present invention. In these figures, elements having the same functions are given the same reference numerals. Note that the embodiments described below with reference to these drawings are merely examples, and the adhesive tape of the present invention is not limited to the following examples.

第１および第２実施形態の粘着テープ１、１０は、図１～図４に示されるように、柔軟性および通気性を有するシート状基材２と、シート状基材２の表面に（直接または間接的に）設けられる粘着剤層３と、シート状基材２の表面に（直接または間接的に）設けられる複数の検知対象膜４とを備えている。粘着テープ１、１０は、人体の皮膚などの貼付対象に粘着剤層３が粘着することにより、貼付対象に貼り付けられて使用される。粘着テープ１、１０は、たとえば、粘着剤層３に吸収パットが貼り付けられて、絆創膏として使用することができる。粘着テープ１、１０は、通気性を良くするために、複数の通気孔（図示せず）が設けられてもよい。粘着テープ１、１０は、貼付対象に貼り付けられて使用される用途であれば、絆創膏としての用途に限定されることはなく、たとえば、人体の関節の動きを制限するためのテーピングや構造物の破損個所の補修などの他の用途にも用いることができる。粘着テープ１、１０は、特に、貼付対象から脱落した際にＸ線検査装置や金属検知器などの検知装置により検知する必要のある、食品の製造や加工などを行なう食品工場などにおいて、貼付対象に貼り付ける必要のある用途に好適に用いられる。なお、第１および第２実施形態では、粘着剤層３は、シート状基材２の一方の面に設けられ、複数の検知対象膜４は、シート状基材２の他方の面に設けられている。以下では、その配置に基づいて第１および第２実施形態の粘着テープ１、１０を説明する。しかし、粘着剤層３および複数の検知対象膜４は、シート状基材２のいずれか一方の同じ表面に設けられてもよく、その場合、互いに積層されてもよく、互いに重ならないように分散して配置されてもよい。 As shown in Figs. 1 to 4, the adhesive tapes 1 and 10 of the first and second embodiments include a flexible and breathable sheet-like substrate 2, an adhesive layer 3 provided (directly or indirectly) on the surface of the sheet-like substrate 2, and a plurality of detection target membranes 4 provided (directly or indirectly) on the surface of the sheet-like substrate 2. The adhesive tapes 1 and 10 are used by being attached to an object to be attached, such as the skin of a human body, by the adhesive layer 3 adhering to the object to be attached. The adhesive tapes 1 and 10 can be used as a bandage, for example, by attaching an absorbent pad to the adhesive layer 3. The adhesive tapes 1 and 10 may be provided with a plurality of ventilation holes (not shown) to improve breathability. The adhesive tapes 1 and 10 are not limited to use as a bandage, as long as they are used by being attached to an object to be attached, and can also be used for other purposes, such as taping to restrict the movement of joints in the human body and repairing damaged parts of a structure. The adhesive tapes 1 and 10 are particularly suitable for use in applications where the tape must be attached to an object to be attached, such as in food factories that manufacture and process food and where the tape must be detected by a detection device such as an X-ray inspection device or a metal detector when the tape falls off the object. In the first and second embodiments, the adhesive layer 3 is provided on one side of the sheet-like substrate 2, and the multiple detection target films 4 are provided on the other side of the sheet-like substrate 2. The adhesive tapes 1 and 10 of the first and second embodiments will be described below based on their arrangement. However, the adhesive layer 3 and the multiple detection target films 4 may be provided on the same surface of either one of the sheet-like substrates 2, and in that case, they may be stacked on each other, or may be distributed so as not to overlap each other.

粘着テープ１、１０は、第１および第２実施形態では、図１～図４に示されるように、第１の方向Ｘ１に沿って延び、第１の方向Ｘ１に対して略直交する第２の方向Ｘ２に幅を有する長尺状に形成されている。粘着テープ１、１０は、第１の方向Ｘ１に対して交差する方向（たとえば第２の方向Ｘ２）に沿って切断することで、第１の方向Ｘ１で所望の長さを有する粘着テープに形成することができる。ただし、粘着テープ１、１０は、あらかじめ切断されて、第１の方向Ｘ１で所望の長さを有するテープ片として形成されてもよい。第１の方向Ｘ１は、図１～図４では略直線状に延びる方向として示されているが、略直線状に限定されることはなく、湾曲線状など他の線状に延びる方向であっても構わない。 In the first and second embodiments, the adhesive tapes 1 and 10 are formed in a long shape extending along a first direction X1 and having a width in a second direction X2 substantially perpendicular to the first direction X1, as shown in Figs. 1 to 4. The adhesive tapes 1 and 10 can be cut along a direction intersecting the first direction X1 (for example, the second direction X2) to form an adhesive tape having a desired length in the first direction X1. However, the adhesive tapes 1 and 10 may be cut in advance to form a tape piece having a desired length in the first direction X1. The first direction X1 is shown as a direction extending substantially linearly in Figs. 1 to 4, but is not limited to a substantially linear direction and may be a direction extending in another linear shape, such as a curved linear shape.

シート状基材２は、第１および第２の方向Ｘ１、Ｘ２に沿って拡張するシート状に形成され、柔軟性および通気性を有する部材である。シート状基材２は、表面（第１および第２実施形態では一方の面）に設けられる粘着剤層３と、表面（第１および第２実施形態では他方の面）に設けられる複数の検知対象膜４とを支持する。シート状基材２は、図１、図２および図４に示されるように、第１の方向Ｘ１に沿って延びる第１の端縁２１を有している。図示された例では、一対の第１の端縁２１、２１の両方が第１の方向Ｘ１に沿って延びるように形成されている。ただし、シート状基材２は、少なくとも１つの端縁が第１の方向Ｘ１に沿って延びていればよく、他の端縁が、他の方向に沿って延びるように形成されていてもよい。また、シート状基材２は、図示されるように、第１の方向Ｘ１に対して略直交する第２の方向Ｘ２に沿って延びる第２の端縁２２を有していてもよい。ただし、第２の端縁２２は、必ずしも第２の方向Ｘ２に沿うように形成されていなくてもよく、略半円弧状など、他の形態で延びるように形成されてもよい。 The sheet-like substrate 2 is a flexible and breathable member formed in a sheet shape that expands along the first and second directions X1 and X2. The sheet-like substrate 2 supports an adhesive layer 3 provided on the surface (one side in the first and second embodiments) and a plurality of detection target films 4 provided on the surface (the other side in the first and second embodiments). The sheet-like substrate 2 has a first edge 21 extending along the first direction X1 as shown in Figs. 1, 2 and 4. In the illustrated example, both of the pair of first edges 21, 21 are formed to extend along the first direction X1. However, the sheet-like substrate 2 may have at least one edge extending along the first direction X1, and the other edge may be formed to extend along the other direction. In addition, the sheet-like substrate 2 may have a second edge 22 extending along a second direction X2 that is approximately perpendicular to the first direction X1 as shown in the figure. However, the second edge 22 does not necessarily have to be formed along the second direction X2, and may be formed to extend in another shape, such as a roughly semicircular arc shape.

シート状基材２は、柔軟性および通気性を有し、粘着剤層３および複数の検知対象膜４を支持する強度を有していれば、特に限定されることはなく、たとえばフィルムや、織物、編物、不織布などの布帛、またはそれらの組み合わせにより形成することができる。シート状基材２は、柔軟性および通気性を有するように形成されるので、人体の皮膚など、貼り付けられた後に形状が変化する貼付対象に貼り付けられたとしても、貼付対象の形状変化に追従して容易に変形することができ、また、貼付面の湿度上昇が抑制されることで、貼付対象に対する貼付状態を比較的長時間に亘って良好に維持することができる。 The sheet-like substrate 2 is not particularly limited as long as it has flexibility and breathability and is strong enough to support the adhesive layer 3 and the multiple detection target membranes 4, and can be formed, for example, from a film, a fabric such as a woven fabric, knitted fabric, or nonwoven fabric, or a combination thereof. Since the sheet-like substrate 2 is formed to have flexibility and breathability, even if it is attached to an attachment target that changes shape after attachment, such as human skin, it can easily deform to follow the change in shape of the attachment target, and by suppressing an increase in humidity on the attachment surface, it can maintain a good attachment state to the attachment target for a relatively long period of time.

シート状基材２に用いられるフィルムとしては、特に限定されることはなく、ポリエチレン、ポリプロピレン、ポリウレタン、ポリエステル、塩化ビニル、オレフィン、ポリカーボネート、ポリサルフィン、ポリフェニレンサルファイド、ポリイミド、エラストマーなどの合成樹脂、および／または、ウレタンゴム、シリコンゴム、エチレンプロピレンゴム、ニトリルゴム、水素化ニトリルゴム、スチレンプロピレンゴム、天然ゴムなどのゴムを成分とするフィルムを用いることができる。 The film used for the sheet-like substrate 2 is not particularly limited, and may be a film containing synthetic resins such as polyethylene, polypropylene, polyurethane, polyester, vinyl chloride, olefin, polycarbonate, polysulfine, polyphenylene sulfide, polyimide, elastomer, and/or rubber such as urethane rubber, silicone rubber, ethylene propylene rubber, nitrile rubber, hydrogenated nitrile rubber, styrene propylene rubber, and natural rubber.

シート状基材２に用いられる布帛としては、特に限定されることはなく、ポリエステル繊維、ポリアクリル繊維、ポリウレタン繊維、ナイロン繊維、レーヨン繊維などの合成繊維、および／または、毛、綿、麻、絹などの天然繊維からなる織物、編物、または不織布を用いることができる。 The fabric used for the sheet-like substrate 2 is not particularly limited, and can be woven, knitted, or nonwoven fabric made of synthetic fibers such as polyester fibers, polyacrylic fibers, polyurethane fibers, nylon fibers, or rayon fibers, and/or natural fibers such as wool, cotton, hemp, or silk.

シート状基材２は、第１および第２実施形態では、第１の方向Ｘ１に延びる経糸と、第１の方向Ｘ１に略直交する第２の方向Ｘ２に延びる緯糸とで織成される織物である。シート状基材２は、たとえば互いに異なる特性を有する経糸と緯糸とを用いて織成することで、第１の方向Ｘ１と第２の方向Ｘ２とで異方性を持たせることができる。たとえば、シート状基材２は、経糸より伸長率の大きい緯糸を用いることで、第１の方向Ｘ１と比べて第２の方向Ｘ２における伸長率を大きくすることができる。そうすることで、粘着テープ１、１０の第２の方向Ｘ２の伸長率を大きくすることができ、粘着テープ１、１０は、たとえば人間の指に巻くような際に、指にフィットして馴染みやすくなる。このような経糸および緯糸の好適な組み合わせとして、綿１００％の経糸、および、綿に１～５％、好ましくは１～３％、さらに好ましくは２％のポリウレタンを加えた緯糸の組み合わせが例示される。織物は、特に限定されることはないが、たとえば公知の平織などにより形成することができる。なお、第１および第２の方向Ｘ１、Ｘ２に延びる端縁を有するシート状基材２を上述した織物とすることで、その端縁において経糸および／または緯糸が解れやすくなるが、後述するように、検知対象膜４がシート状基材２の端縁に隣接して配置されることで、経糸および／または緯糸の解れが抑制される。 In the first and second embodiments, the sheet-like substrate 2 is a fabric woven with warp threads extending in a first direction X1 and weft threads extending in a second direction X2 substantially perpendicular to the first direction X1. The sheet-like substrate 2 can be anisotropic in the first direction X1 and the second direction X2, for example, by weaving the substrate with warp threads and weft threads having different properties. For example, the sheet-like substrate 2 can have a larger elongation rate in the second direction X2 than in the first direction X1 by using a weft thread having a larger elongation rate than the warp thread. By doing so, the elongation rate of the adhesive tape 1, 10 in the second direction X2 can be increased, and the adhesive tape 1, 10 can fit and become familiar to the finger when wrapped around a human finger, for example. An example of a suitable combination of such warp threads and weft threads is a combination of a warp thread made of 100% cotton and a weft thread made of cotton with 1 to 5%, preferably 1 to 3%, and more preferably 2% polyurethane added thereto. The woven fabric is not particularly limited, but can be formed, for example, by a known plain weave. By forming the sheet-like substrate 2 having edges extending in the first and second directions X1 and X2 as the above-mentioned woven fabric, the warp and/or weft threads at the edges are likely to come undone, but as described below, by arranging the detection target membrane 4 adjacent to the edges of the sheet-like substrate 2, the unraveling of the warp and/or weft threads is suppressed.

粘着剤層３は、シート状基材２の表面（第１および第２実施形態では一方の面）上に設けられ、貼付対象に粘着し、シート状基材２を貼付対象に貼り付ける層である。粘着剤層３は、第１および第２実施形態では、図３に示されるように、シート状基材２の表面の略全体に亘って連続的に設けられている。しかし、粘着剤層３は、シート状基材２を貼付対象に貼り付けることができればよく、シート状基材２の表面上に部分的に、または分散して設けられてもよい。粘着剤層３を構成する粘着剤としては、特に限定されることはなく、天然ゴム系粘着剤、合成ゴム系粘着剤、アクリル系粘着剤、ウレタン系粘着剤、シリコーン系粘着剤などの公知の粘着剤を用いることができる。 The adhesive layer 3 is provided on the surface of the sheet-like substrate 2 (one side in the first and second embodiments), and adheres to the target to which it is to be attached, thereby attaching the sheet-like substrate 2 to the target. In the first and second embodiments, the adhesive layer 3 is provided continuously over substantially the entire surface of the sheet-like substrate 2, as shown in FIG. 3. However, the adhesive layer 3 may be provided partially or dispersedly on the surface of the sheet-like substrate 2 as long as it can attach the sheet-like substrate 2 to the target. The adhesive constituting the adhesive layer 3 is not particularly limited, and known adhesives such as natural rubber adhesives, synthetic rubber adhesives, acrylic adhesives, urethane adhesives, and silicone adhesives can be used.

検知対象膜４は、シート状基材２の表面（第１および第２実施形態では他方の面）上に設けられ、Ｘ線検査装置や金属検知器などの検知装置により検知され得る膜である。粘着テープ１、１０は、検知装置により検知可能な検知対象膜４を備えることで、たとえば食品の製造や加工などを行なう食品工場において、貼付対象から脱落したとしても、Ｘ線検査装置や金属検知器などの検知装置により検知することができるので、食品への混入を抑制することができる。 The detection target film 4 is provided on the surface of the sheet-like substrate 2 (the other surface in the first and second embodiments) and is a film that can be detected by a detection device such as an X-ray inspection device or a metal detector. By providing the detection target film 4 that can be detected by a detection device, the adhesive tapes 1 and 10 can be detected by a detection device such as an X-ray inspection device or a metal detector even if the film falls off from the object to which it is attached, for example in a food factory where food is manufactured or processed, and thus contamination of the food can be prevented.

検知対象膜４は、以下に詳しく述べるようにシート状基材２の表面に分散して配置されていれば、その形状や大きさは特に限定されない。検知対象膜４は、たとえば、図１、図２および図４に示されるように、上面視で略四角形状に形成することができる。ただし、検知対象膜４は、以下でも述べるように、上面視で略三角形状や略円形状など他の形状に形成されてもよい。また、検知対象膜４の大きさは、たとえば、製造上の容易さの観点から、上面視の面積で、０．０２５ｍｍ²以上が好ましく、１ｍｍ²以上がさらに好ましく、４ｍｍ²以上がよりさらに好ましい。検知対象膜４の大きさは、たとえば、粘着テープ１、１０の柔軟性の観点から、１００ｍｍ²以下が好ましく、３６ｍｍ²以下がさらに好ましく、１６ｍｍ²以下がよりさらに好ましい。 The shape and size of the detection target film 4 are not particularly limited as long as it is dispersed and arranged on the surface of the sheet-like substrate 2 as described in detail below. The detection target film 4 can be formed, for example, in a substantially rectangular shape when viewed from above, as shown in FIG. 1, FIG. 2, and FIG. 4. However, the detection target film 4 may be formed in other shapes, such as a substantially triangular shape or a substantially circular shape when viewed from above, as described below. In addition, the size of the detection target film 4 is, for example, from the viewpoint of ease of manufacture, preferably 0.025 mm ^{2 or more, more preferably 1 mm 2 or more, and even more preferably 4 mm 2 or more, in terms of area when viewed from above. The size of the detection target film 4 is, for example, preferably 100 mm 2} ^{or less, more preferably 36 mm 2} ^or ^less ^, and even more preferably 16 mm ² or less, in terms of flexibility of the adhesive tapes 1 and 10.

検知対象膜４は、図３に示されるように、Ｘ線検査装置や金属検知器などの検知装置により検知可能とするために、結合材４１および検知対象材４２を含んでいる。検知対象膜４は、たとえば結合材４１および検知対象材４２の混合物をシルクスクリーン方式やインクジェット方式でシート状基材２の表面に塗布して、加熱して乾燥させることにより形成することができる。あるいは、検知対象膜４は、結合材４１および検知対象材４２の混合物を膜状に形成したものを熱融着や接着剤などの公知の接着手段によりシート状基材２の表面に接着することにより形成することもできる。検知対象膜４は、顔料などの他の材料を含んでいてもよい。 As shown in FIG. 3, the detection target film 4 contains a binder 41 and a detection target material 42 so that it can be detected by a detection device such as an X-ray inspection device or a metal detector. The detection target film 4 can be formed, for example, by applying a mixture of the binder 41 and the detection target material 42 to the surface of the sheet-like substrate 2 by silk screen printing or inkjet printing, and then heating and drying. Alternatively, the detection target film 4 can be formed by forming a mixture of the binder 41 and the detection target material 42 into a film and adhering it to the surface of the sheet-like substrate 2 by known adhesion means such as heat fusion or adhesives. The detection target film 4 may contain other materials such as pigments.

結合材４１は、シート状基材２の表面に固定されて、シート状基材２に対して検知対象材４２を保持し、固定する部材である。結合材４１は、シート状基材２の表面に固定されることで、シート状基材２の表面を保護し、強化する機能も有する。結合材４１としては、シート状基材２に対して検知対象材４２を保持し、固定することができれば、特に限定されることはなく、たとえば樹脂材料など、より具体的には熱硬化性樹脂を採用することができる。熱硬化性樹脂としては、たとえばアクリル樹脂、エポキシ樹脂、フェノール樹脂、不飽和ポリエステル樹脂、メラミン樹脂、ポリウレタン樹脂などが例示され、たとえばアクリル酸アルキルエステル・スチレン共重合体が、高堅牢度および高伸縮性を有するという点で、好適に用いられる。 The binder 41 is a member that is fixed to the surface of the sheet-like substrate 2 and holds and fixes the detection target material 42 to the sheet-like substrate 2. By being fixed to the surface of the sheet-like substrate 2, the binder 41 also has the function of protecting and strengthening the surface of the sheet-like substrate 2. The binder 41 is not particularly limited as long as it can hold and fix the detection target material 42 to the sheet-like substrate 2, and can be, for example, a resin material, more specifically, a thermosetting resin. Examples of thermosetting resins include acrylic resin, epoxy resin, phenolic resin, unsaturated polyester resin, melamine resin, and polyurethane resin, and for example, an acrylic acid alkyl ester-styrene copolymer is preferably used because it has high fastness and high elasticity.

検知対象材４２は、Ｘ線検査装置や金属検知器などの検知装置により検知可能な材料である。検知対象材４２としては、検知装置により検知可能であれば、特に限定されることはなく、たとえば金属検知器により好適に検知可能な磁性粉や、Ｘ線検査装置により好適に検知可能なタングステン含有粉を用いることができる。 The detection target material 42 is a material that can be detected by a detection device such as an X-ray inspection device or a metal detector. There are no particular limitations on the detection target material 42 as long as it can be detected by a detection device, and for example, magnetic powder that can be suitably detected by a metal detector or tungsten-containing powder that can be suitably detected by an X-ray inspection device can be used.

磁性紛は、磁性材料を含む粉体（粒子）であり、たとえば、酸化鉄系磁性材料や合金系磁性材料などを含む粉体である。その中でも、合金系磁性材料を含む粉体は、検知対象膜４を磁性紛の色以外の他の色に着色しやすいという点で、好適に用いられ、たとえば鉄系合金、特に８％Ｃｒ鋼が好適に用いられる。磁性粉は、検知対象膜４内に含ませることができれば、その大きさ、形状、含有量などは特に限定されることはなく、金属検知器の検知能力、検知対象膜４内での分散性、シート状基材２の変形に対する追従性などに応じて適宜設定することができる。 The magnetic powder is a powder (particle) containing a magnetic material, for example, a powder containing an iron oxide-based magnetic material or an alloy-based magnetic material. Among them, a powder containing an alloy-based magnetic material is preferably used because it is easy to color the detection target film 4 in a color other than the color of the magnetic powder, and for example, an iron-based alloy, particularly 8% Cr steel, is preferably used. As long as the magnetic powder can be contained in the detection target film 4, its size, shape, content, etc. are not particularly limited, and it can be set appropriately depending on the detection ability of the metal detector, dispersibility in the detection target film 4, and followability to deformation of the sheet-like substrate 2.

タングステン含有粉は、タングステンを含む粉体（粒子）であり、たとえば、金属タングステン粉、酸化タングステン（ＷＯ₃など）粉、炭化タングステン粉、窒化タングステン粉、またはそれらの混合粉などである。その中でも、金属タングステン粉または酸化タングステン粉、特に酸化タングステン粉が好適に用いられる。タングステン含有粉は、検知対象膜４内に含ませることができれば、その大きさ、形状、含有量などは特に限定されることはなく、Ｘ線検査装置の検知能力、検知対象膜４内での分散性、シート状基材２の変形に対する追従性などに応じて適宜設定することができる。 The tungsten-containing powder is a powder (particle) containing tungsten, such as metal tungsten powder, tungsten oxide ( _WO3 , etc.) powder, tungsten carbide powder, tungsten nitride powder, or a mixture thereof. Among them, metal tungsten powder or tungsten oxide powder, especially tungsten oxide powder, is preferably used. As long as the tungsten-containing powder can be contained in the detection target film 4, its size, shape, content, etc. are not particularly limited, and it can be appropriately set according to the detection ability of the X-ray inspection device, the dispersibility in the detection target film 4, the followability to the deformation of the sheet-like substrate 2, etc.

検知対象膜４は、図１、図２および図４に示されるように、シート状基材２の表面に複数設けられているが、その複数の検知対象膜４は、シート状基材２の表面の少なくとも一部が露出するように、シート状基材２の表面上で互いに間隔を空けて分散して配置されている。このように複数の検知対象膜４がシート状基材２の表面上で分散して配置されることで、シート状基材２の表面の全面に検知対象膜が設けられる場合と比べて、シート状基材２が有する柔軟性および通気性の低下を抑制することができる。さらに、複数の検知対象膜４のうち少なくとも１つが、シート状基材２の第１の端縁２１に隣接して配置されている。これにより、シート状基材２の第１の端縁２１が、検知対象膜４の結合材４１によって保護・強化されて、第１の端縁２１の欠損が抑制される。特に、第１および第２実施形態のように、第１の方向Ｘ１に沿って延びる経糸および第２の方向Ｘ２に沿って延びる緯糸により織成された織物によりシート状基材２が構成されている場合には、第１の端縁２１における経糸の解れが抑制される。 As shown in Figures 1, 2 and 4, a plurality of detection target films 4 are provided on the surface of the sheet-like substrate 2, and the plurality of detection target films 4 are arranged at intervals on the surface of the sheet-like substrate 2 so that at least a portion of the surface of the sheet-like substrate 2 is exposed. By distributing the plurality of detection target films 4 on the surface of the sheet-like substrate 2 in this manner, it is possible to suppress a decrease in the flexibility and breathability of the sheet-like substrate 2 compared to the case where the detection target film is provided on the entire surface of the sheet-like substrate 2. Furthermore, at least one of the plurality of detection target films 4 is arranged adjacent to the first edge 21 of the sheet-like substrate 2. As a result, the first edge 21 of the sheet-like substrate 2 is protected and strengthened by the binding material 41 of the detection target film 4, and damage to the first edge 21 is suppressed. In particular, when the sheet-like substrate 2 is made of a fabric woven with warp threads extending along the first direction X1 and weft threads extending along the second direction X2, as in the first and second embodiments, the unraveling of the warp threads at the first edge 21 is suppressed.

ここで、「第１の端縁２１に隣接して配置される」とは、第２の方向Ｘ２の所定の長さ以下まで第１の端縁２１に近接して、シート状基材２の表面上に配置されることを意味する。第１の端縁２１からの第２の方向Ｘ２の所定の長さは、第１の端縁２１で欠損が生じる可能性のある第１の端縁２１からの第２の方向Ｘ２における範囲に応じて適宜設定することができる。たとえば、第１の端縁２１からの第２の方向Ｘ２の所定の長さは、１ｍｍ以下が好ましく、０．５ｍｍ以下がさらに好ましく、０．１ｍｍ以下がよりさらに好ましく、０ｍｍが最も好ましい。なお、図示された例では、第１の端縁２１からの第２の方向Ｘ２の所定の長さは０ｍｍである。 Here, "disposed adjacent to the first edge 21" means that the sheet-like substrate 2 is disposed on the surface thereof close to the first edge 21 up to a predetermined length in the second direction X2. The predetermined length in the second direction X2 from the first edge 21 can be set appropriately according to the range in the second direction X2 from the first edge 21 where defects may occur at the first edge 21. For example, the predetermined length in the second direction X2 from the first edge 21 is preferably 1 mm or less, more preferably 0.5 mm or less, even more preferably 0.1 mm or less, and most preferably 0 mm. In the illustrated example, the predetermined length in the second direction X2 from the first edge 21 is 0 mm.

検知対象膜４は、シート状基材２の第１の端縁２１に隣接して少なくとも１つ設けられていればよく、第１の端縁２１に隣接して配置される検知対象膜４の数や配置は特に限定されない。第１および第２実施形態では、図２および図４に示されるように、複数の検知対象膜４がそれぞれ、シート状基材２の第１の端縁２１に隣接して、第１の方向Ｘ１に沿って間隔（図２の第１実施形態の粘着テープ１では略等しい間隔）を空けて並んで配置されている。このように複数の検知対象膜４が第１の方向Ｘ１に沿って間隔を空けて並んで配置されることで、第１の端縁２１におけるシート状基材２の柔軟性の低下を抑制しながら、隣り合う検知対象膜４、４間の間隔以上の長さに亘る第１の端縁２１の欠損を抑制することができる。 At least one detection target film 4 may be provided adjacent to the first edge 21 of the sheet-like substrate 2, and the number and arrangement of the detection target films 4 arranged adjacent to the first edge 21 are not particularly limited. In the first and second embodiments, as shown in Figs. 2 and 4, a plurality of detection target films 4 are arranged adjacent to the first edge 21 of the sheet-like substrate 2 at intervals (approximately equal intervals in the adhesive tape 1 of the first embodiment of Fig. 2) along the first direction X1. By arranging a plurality of detection target films 4 at intervals along the first direction X1 in this manner, it is possible to suppress the loss of the first edge 21 over a length equal to or greater than the interval between adjacent detection target films 4, 4 while suppressing the decrease in flexibility of the sheet-like substrate 2 at the first edge 21.

複数の検知対象膜４はそれぞれ、第１の方向Ｘ１に沿って互いに間隔を空けて並んで配置されていればよく、第１の端縁２１に隣接する検知対象膜４の大きさや隣り合う検知対象膜４、４間の間隔は特に限定されない。たとえば、検知対象膜４の第１の方向Ｘ１における長さや、隣り合う検知対象膜４、４間の間隔は、第１の端縁２１におけるシート状基材２の柔軟性の低下を抑制するという観点や、第１の端縁２１の欠損を抑制するという観点から、適宜設定することができる。たとえば、図２の第１実施形態の粘着テープ１において、シート状基材２の柔軟性の低下を抑制するという観点から、検知対象膜４の第１の方向Ｘ１における長さＬ１と、隣り合う検知対象膜４、４間の間隔Ｄ１との比（Ｌ１／Ｄ１）は、１０／１以下が好ましく、５／１以下がさらに好ましく、２／１以下がよりさらに好ましい。また、第１の端縁２１の欠損を抑制するという観点から、長さＬ１と間隔Ｄ１との比（Ｌ１／Ｄ１）は、１／５以上が好ましく、１／３以上が好ましく、１／１以上がよりさらに好ましい。 The multiple detection target films 4 may be arranged side by side at intervals along the first direction X1, and the size of the detection target film 4 adjacent to the first edge 21 and the interval between adjacent detection target films 4, 4 are not particularly limited. For example, the length of the detection target film 4 in the first direction X1 and the interval between adjacent detection target films 4, 4 can be appropriately set from the viewpoint of suppressing a decrease in the flexibility of the sheet-like substrate 2 at the first edge 21 and from the viewpoint of suppressing damage to the first edge 21. For example, in the adhesive tape 1 of the first embodiment of FIG. 2, from the viewpoint of suppressing a decrease in the flexibility of the sheet-like substrate 2, the ratio (L1/D1) of the length L1 of the detection target film 4 in the first direction X1 to the interval D1 between adjacent detection target films 4, 4 is preferably 10/1 or less, more preferably 5/1 or less, and even more preferably 2/1 or less. In addition, from the viewpoint of suppressing damage to the first edge 21, the ratio of the length L1 to the distance D1 (L1/D1) is preferably 1/5 or more, more preferably 1/3 or more, and even more preferably 1/1 or more.

検知対象膜４は、シート状基材２の第１の端縁２１に隣接して少なくとも１つ設けられていればよく、他の検知対象膜４の配置は特に限定されない。たとえば、図２および図４に示される第１および第２実施形態の粘着テープ１、１０のように、第１の方向Ｘ１におけるシート状基材２の全長に亘る、第１の方向Ｘ１に沿った任意の線上に、複数の検知対象膜４のうち少なくとも１つが存在するように、複数の検知対象膜４がシート状基材２の表面上に配置されてもよい。そのように検知対象膜４が配置されることで、第１の方向Ｘ１に沿って粘着テープ１、１０が第２の方向Ｘ２のいずれの位置で切断されても、少なくとも１つの検知対象膜４が切断されて、切断端縁に隣接して少なくとも１つの検知対象膜４が配置されることになる。これにより、粘着テープ１、１０を第１の方向Ｘ１に沿って切断する限り、第２の方向Ｘ２のいずれの位置で切断しても、切断端縁に隣接して配置される検知対象膜４によって、切断端縁の欠損が抑制される。したがって、粘着テープ１、１０の第２の方向Ｘ２の長さを自在に調節することができる。なお、第１の方向Ｘ１だけでなく、第１の方向Ｘ１から傾斜した任意の方向に沿った任意の線上に、複数の検知対象膜４のうち少なくとも１つが存在するように、複数の検知対象膜４がシート状基材２の表面上に配置されてもよい。 At least one detection target film 4 may be provided adjacent to the first edge 21 of the sheet-like substrate 2, and the arrangement of the other detection target films 4 is not particularly limited. For example, as in the adhesive tapes 1 and 10 of the first and second embodiments shown in FIG. 2 and FIG. 4, a plurality of detection target films 4 may be arranged on the surface of the sheet-like substrate 2 so that at least one of the plurality of detection target films 4 is present on any line along the first direction X1 over the entire length of the sheet-like substrate 2 in the first direction X1. By arranging the detection target films 4 in this manner, even if the adhesive tapes 1 and 10 are cut along the first direction X1 at any position in the second direction X2, at least one detection target film 4 is cut and at least one detection target film 4 is arranged adjacent to the cut edge. As a result, as long as the adhesive tapes 1 and 10 are cut along the first direction X1, even if they are cut at any position in the second direction X2, damage to the cut edge is suppressed by the detection target film 4 arranged adjacent to the cut edge. Therefore, the length of the adhesive tape 1, 10 in the second direction X2 can be freely adjusted. Note that the multiple detection target films 4 may be arranged on the surface of the sheet-like substrate 2 so that at least one of the multiple detection target films 4 is present not only in the first direction X1 but also on any line along any direction inclined from the first direction X1.

検知対象膜４は、シート状基材２の第１の方向Ｘ１に沿った任意の線上に少なくとも１つ設けられていればよく、その任意の線上に配置される検知対象膜４の数や配置は特に限定されない。第１および第２実施形態では、図２および図４に示されるように、複数の検知対象膜４がそれぞれ、シート状基材２の第１の方向Ｘ１に沿った任意の線上で、第１の方向Ｘ１に沿って間隔（図２の第１実施形態の粘着テープ１では略等しい間隔）を空けて並んで配置されている。このように複数の検知対象膜４が第１の方向Ｘ１に沿って間隔を空けて並んで配置されることで、第１の方向Ｘ１に沿って粘着テープ１、１０を第２の方向Ｘ２のいずれの位置で切断しても、切断端縁におけるシート状基材２の柔軟性の低下を抑制しながら、隣り合う検知対象膜４、４間の間隔以上の長さに亘る切断端縁の欠損を抑制することができる。 At least one detection target film 4 may be provided on any line along the first direction X1 of the sheet-like substrate 2, and the number and arrangement of the detection target films 4 arranged on the arbitrary line are not particularly limited. In the first and second embodiments, as shown in FIG. 2 and FIG. 4, a plurality of detection target films 4 are arranged on any line along the first direction X1 of the sheet-like substrate 2 at intervals (approximately equal intervals in the adhesive tape 1 of the first embodiment of FIG. 2) along the first direction X1. By arranging a plurality of detection target films 4 at intervals along the first direction X1 in this manner, even if the adhesive tape 1, 10 is cut at any position in the second direction X2 along the first direction X1, it is possible to suppress loss of the cut edge over a length equal to or greater than the interval between adjacent detection target films 4, 4 while suppressing a decrease in flexibility of the sheet-like substrate 2 at the cut edge.

複数の検知対象膜４はそれぞれ、第１の方向Ｘ１に沿って互いに間隔を空けて並んで配置されていればよく、第１の方向Ｘ１に沿った任意の線上における検知対象膜４の大きさや隣り合う検知対象膜４、４間の間隔の長さは特に限定されない。たとえば、検知対象膜４の第１の方向Ｘ１における長さや、隣り合う検知対象膜４、４間の間隔は、第１の方向Ｘ１に沿った任意の切断端縁におけるシート状基材２の柔軟性の低下を抑制するという観点や、切断端縁の欠損を抑制するという観点から、適宜設定することができる。たとえば、図２の第１実施形態の粘着テープ１において、シート状基材２の柔軟性の低下を抑制するという観点から、検知対象膜４の第１の方向Ｘ１における長さＬ１と隣り合う検知対象膜４、４間の間隔Ｄ１との比（Ｌ１／Ｄ１）は、１０／１以下が好ましく、５／１以下がさらに好ましく、２／１以下がよりさらに好ましい。また、第１の方向Ｘ１に沿った任意の切断端縁の欠損を抑制するという観点から、長さＬ１と間隔Ｄ１との比（Ｌ１／Ｄ１）は、１／５以上が好ましく、１／３以上が好ましく、１／１以上がよりさらに好ましい。 The multiple detection target films 4 may be arranged side by side at intervals along the first direction X1, and the size of the detection target film 4 on any line along the first direction X1 and the length of the interval between adjacent detection target films 4, 4 are not particularly limited. For example, the length of the detection target film 4 in the first direction X1 and the interval between adjacent detection target films 4, 4 can be appropriately set from the viewpoint of suppressing a decrease in flexibility of the sheet-like substrate 2 at any cut edge along the first direction X1 and from the viewpoint of suppressing damage to the cut edge. For example, in the adhesive tape 1 of the first embodiment of FIG. 2, from the viewpoint of suppressing a decrease in flexibility of the sheet-like substrate 2, the ratio (L1/D1) of the length L1 of the detection target film 4 in the first direction X1 to the interval D1 between adjacent detection target films 4, 4 is preferably 10/1 or less, more preferably 5/1 or less, and even more preferably 2/1 or less. In addition, from the viewpoint of suppressing defects on any cut edge along the first direction X1, the ratio of the length L1 to the distance D1 (L1/D1) is preferably 1/5 or more, more preferably 1/3 or more, and even more preferably 1/1 or more.

第１実施形態の粘着テープ１における複数の検知対象膜４は、図２に示されるように、第２の方向Ｘ２に沿って複数の検知対象膜４が互いに第１の間隙Ｇ１を挟んで並んで配置される少なくとも１つの第１の列Ｒ１と、第２の方向Ｘ２に沿って複数の検知対象膜４が互いに第２の間隙Ｇ２を挟んで並んで配置される少なくとも１つの第２の列Ｒ２とを備えている。第１および第２の列Ｒ１、Ｒ２は、図示された例では、第２の方向Ｘ２におけるシート状基材２の略全長に亘って延びている。また、第１および第２の列Ｒ１、Ｒ２は、第１の方向Ｘ１に沿って互いに間隔を空けて交互に配列されている。第１および第２の列Ｒ１、Ｒ２は、図示された例では、第１の方向Ｘ１におけるシート状基材２の略全長に亘って、第１の方向Ｘ１に沿って互いに間隔を空けて交互に配列されている。第１および第２の列Ｒ１、Ｒ２は、第１の列Ｒ１における全ての第１の間隙Ｇ１の第１の方向Ｘ１の延長線上に第２の列Ｒ２における検知対象膜４が存在し、第２の列Ｒ２における全ての第２の間隙Ｇ２の第１の方向Ｘ１の延長線上に第１の列Ｒ１における検知対象膜４が存在するように、第２の方向Ｘ２で互いに対してオフセットされて配置されている。第１実施形態の粘着テープ１では、このように複数の検知対象膜４がシート状基材２の表面上に配置されることで、第１の方向Ｘ１に沿った任意の線上に検知対象膜４が存在することになる。したがって、第１の方向Ｘ１に沿って粘着テープ１が第２の方向Ｘ２のいずれの位置で切断されても、検知対象膜４が切断されて、切断端縁に隣接して配置される検知対象膜４によって、切断端縁の欠損が抑制される。 2, the plurality of detection target films 4 in the adhesive tape 1 of the first embodiment include at least one first row R1 in which the plurality of detection target films 4 are arranged side by side with a first gap G1 between them along the second direction X2, and at least one second row R2 in which the plurality of detection target films 4 are arranged side by side with a second gap G2 between them along the second direction X2. In the illustrated example, the first and second rows R1, R2 extend over substantially the entire length of the sheet-like substrate 2 in the second direction X2. In addition, the first and second rows R1, R2 are alternately arranged at intervals between them along the first direction X1. In the illustrated example, the first and second rows R1, R2 are alternately arranged at intervals between them along the first direction X1 over substantially the entire length of the sheet-like substrate 2 in the first direction X1. The first and second rows R1, R2 are offset from each other in the second direction X2 so that the detection target membrane 4 in the second row R2 is present on the extension line of the first direction X1 of all the first gaps G1 in the first row R1, and the detection target membrane 4 in the first row R1 is present on the extension line of the first direction X1 of all the second gaps G2 in the second row R2. In the adhesive tape 1 of the first embodiment, by arranging a plurality of detection target membranes 4 on the surface of the sheet-like substrate 2 in this manner, the detection target membrane 4 is present on any line along the first direction X1. Therefore, even if the adhesive tape 1 is cut at any position in the second direction X2 along the first direction X1, the detection target membrane 4 is cut, and the detection target membrane 4 arranged adjacent to the cut edge suppresses damage to the cut edge.

第１実施形態の粘着テープ１では、図２に示されるように、第１および第２の列Ｒ１、Ｒ２の両方において、同じ形状（上面視で略正四角形）および同じ大きさの検知対象膜４が、第２の方向Ｘ２に沿ってともに同じ大きさの間隙Ｇ１、Ｇ２を挟んで並んで配置されている。そして、第１および第２の列Ｒ１、Ｒ２は、第１の方向Ｘ１に沿って互いに同じ間隔を空けて交互に繰り返して配列されている。このような配置では、たとえば、シート状基材２の第２の方向Ｘ２の柔軟性の低下を抑制するという観点から、検知対象膜４の第２の方向Ｘ２における長さと、間隙Ｇ１、Ｇ２の第２の方向Ｘ２における長さとの比（検知対象膜の長さ／間隙の長さ）は、１０／１以下が好ましく、５／１以下がさらに好ましく、２／１以下がよりさらに好ましい。また、シート状基材２の第２の方向Ｘ２の強度を高めるという観点から、上記比は、１／５以上が好ましく、１／３以上が好ましく、１／１以上がよりさらに好ましい。また、シート状基材２の第１の方向Ｘ１の柔軟性の低下を抑制するという観点から、検知対象膜４の第１の方向Ｘ１における長さと、第１の列Ｒ１と第２の列Ｒ２との間の間隔との比（検知対象膜の長さ／列間の間隔）は、１０／１以下が好ましく、５／１以下がさらに好ましく、２／１以下がよりさらに好ましい。また、シート状基材２の第１の方向Ｘ１の強度を高めるという観点から、上記比は、１／５以上が好ましく、１／３以上が好ましく、１／１以上がよりさらに好ましい。ただし、複数の検知対象膜４が上述したいくつかの説明のようにシート状基材２の表面上に配置されていれば、検知対象膜４の形状や大きさ、間隙Ｇ１、Ｇ２の大きさ、第１の列Ｒ１と第２の列Ｒ２との間の間隔は、特に限定されることはない。たとえば、検知対象膜４の形状は、上面視で略正四角形以外にも、上面視で略三角形や略円形などであってもよい。また、検知対象膜４の大きさは、それぞれの列内で異なっていてもよいし、列間で互いに異なっていてもよい。また、間隙の大きさも、列内で異なっていてもよいし、列間で互いに異なっていてもよい。また、それぞれの列は、互いに異なる間隔を空けて交互に繰り返して配列されても構わない。 In the adhesive tape 1 of the first embodiment, as shown in FIG. 2, in both the first and second rows R1 and R2, the detection target membranes 4 having the same shape (approximately a regular square in a top view) and the same size are arranged side by side along the second direction X2 with gaps G1 and G2 of the same size therebetween. The first and second rows R1 and R2 are arranged alternately and repeatedly at the same intervals along the first direction X1. In such an arrangement, for example, from the viewpoint of suppressing a decrease in the flexibility of the sheet-like substrate 2 in the second direction X2, the ratio of the length of the detection target membrane 4 in the second direction X2 to the length of the gaps G1 and G2 in the second direction X2 (length of the detection target membrane/length of the gap) is preferably 10/1 or less, more preferably 5/1 or less, and even more preferably 2/1 or less. Moreover, from the viewpoint of increasing the strength of the sheet-like substrate 2 in the second direction X2, the above ratio is preferably 1/5 or more, preferably 1/3 or more, and more preferably 1/1 or more. Moreover, from the viewpoint of suppressing the decrease in the flexibility of the sheet-like substrate 2 in the first direction X1, the ratio of the length of the detection target film 4 in the first direction X1 to the interval between the first row R1 and the second row R2 (length of detection target film/interval between rows) is preferably 10/1 or less, more preferably 5/1 or less, and more preferably 2/1 or less. Moreover, from the viewpoint of increasing the strength of the sheet-like substrate 2 in the first direction X1, the above ratio is preferably 1/5 or more, preferably 1/3 or more, and more preferably 1/1 or more. However, as long as a plurality of detection target films 4 are arranged on the surface of the sheet-like substrate 2 as in some of the above-mentioned explanations, the shape and size of the detection target film 4, the size of the gaps G1 and G2, and the interval between the first row R1 and the second row R2 are not particularly limited. For example, the shape of the detection target membrane 4 may be a substantially square shape when viewed from above, or may be a substantially triangular shape or a substantially circular shape when viewed from above. The size of the detection target membrane 4 may be different within each row, or may be different between rows. The size of the gap may also be different within each row, or may be different between rows. The rows may be arranged alternately and repeatedly with different intervals between each row.

ここで、図２に示される第１実施形態の粘着テープ１および図４に示される第２実施形態の粘着テープ１０のように、複数の検知対象膜４のうち少なくとも１つが、シート状基材２の第２の端縁２２に隣接して配置されてもよい。これにより、シート状基材２の第２の端縁２２が、検知対象膜４の結合材４１によって保護・強化されて、第２の端縁２２の欠損が抑制される。特に、第１および第２実施形態のように、第１の方向Ｘ１に沿って延びる経糸および第２の方向Ｘ２に沿って延びる緯糸により織成された織物によりシート状基材２が構成されている場合には、第２の端縁２２における緯糸の解れが抑制される。 Here, as in the adhesive tape 1 of the first embodiment shown in FIG. 2 and the adhesive tape 10 of the second embodiment shown in FIG. 4, at least one of the multiple detection target films 4 may be arranged adjacent to the second edge 22 of the sheet-like substrate 2. As a result, the second edge 22 of the sheet-like substrate 2 is protected and strengthened by the binder 41 of the detection target film 4, and damage to the second edge 22 is suppressed. In particular, when the sheet-like substrate 2 is composed of a fabric woven with warp threads extending along the first direction X1 and weft threads extending along the second direction X2, as in the first and second embodiments, the unraveling of the weft threads at the second edge 22 is suppressed.

なお、「第２の端縁２２に隣接して配置される」とは、第１の方向Ｘ１の所定の長さ以下まで第２の端縁２２に近接して、シート状基材２の表面上に配置されることを意味する。第２の端縁２２からの第１の方向Ｘ１の所定の長さは、第２の端縁２２で欠損が生じる可能性のある第２の端縁２２からの第１の方向Ｘ１における範囲に応じて適宜設定することができる。たとえば、第２の端縁２２からの第１の方向Ｘ１の所定の長さは、１ｍｍ以下が好ましく、０．５ｍｍ以下がさらに好ましく、０．１ｍｍ以下がよりさらに好ましく、０ｍｍが最も好ましい。なお、図示された例では、第２の端縁２２からの第１の方向Ｘ１の所定の長さは０ｍｍである。 Note that "disposed adjacent to the second edge 22" means that the sheet-like substrate 2 is disposed on the surface thereof close to the second edge 22 up to a predetermined length in the first direction X1 or less. The predetermined length in the first direction X1 from the second edge 22 can be set appropriately according to the range in the first direction X1 from the second edge 22 where defects may occur at the second edge 22. For example, the predetermined length in the first direction X1 from the second edge 22 is preferably 1 mm or less, more preferably 0.5 mm or less, even more preferably 0.1 mm or less, and most preferably 0 mm. Note that in the illustrated example, the predetermined length in the first direction X1 from the second edge 22 is 0 mm.

検知対象膜４は、シート状基材２の第２の端縁２２に隣接して少なくとも１つ設けられていればよく、第２の端縁２２に隣接して配置される検知対象膜４の数や配置は特に限定されない。第１および第２実施形態では、図２および図４に示されるように、複数の検知対象膜４がそれぞれ、シート状基材２の第２の端縁２２に隣接して、第２の方向Ｘ２に沿って間隔（図２の第１実施形態の粘着テープ１では略等しい間隔）を空けて並んで配置されている。このように複数の検知対象膜４が第２の方向Ｘ２に沿って間隔を空けて並んで配置されることで、第２の端縁２２におけるシート状基材２の柔軟性の低下を抑制しながら、隣り合う検知対象膜４、４間の間隔以上の長さに亘る第２の端縁２２の欠損を抑制することができる。 At least one detection target film 4 may be provided adjacent to the second edge 22 of the sheet-like substrate 2, and the number and arrangement of the detection target films 4 arranged adjacent to the second edge 22 are not particularly limited. In the first and second embodiments, as shown in Figs. 2 and 4, the detection target films 4 are arranged adjacent to the second edge 22 of the sheet-like substrate 2 at intervals (approximately equal intervals in the adhesive tape 1 of the first embodiment of Fig. 2) along the second direction X2. In this way, the detection target films 4 are arranged at intervals along the second direction X2, and the loss of the second edge 22 over a length equal to or greater than the interval between adjacent detection target films 4, 4 can be suppressed while suppressing the decrease in flexibility of the sheet-like substrate 2 at the second edge 22.

複数の検知対象膜４はそれぞれ、第２の方向Ｘ２に沿って互いに間隔を空けて並んで配置されていればよく、第２の端縁２２に隣接して配置される検知対象膜４の大きさや隣り合う検知対象膜４、４間の間隔は特に限定されない。たとえば、検知対象膜４の第２の方向Ｘ２における長さや、隣り合う検知対象膜４、４間の間隔は、第２の端縁２２におけるシート状基材２の柔軟性の低下を抑制するという観点や、第２の端縁２２の欠損を抑制するという観点から、適宜設定することができる。たとえば、図２の第１実施形態の粘着テープ１において、シート状基材２の柔軟性の低下を抑制するという観点から、検知対象膜４の第２の方向Ｘ２における長さＬ２と隣り合う検知対象膜４、４間の間隔Ｄ２との比（Ｌ２／Ｄ２）は、１０／１以下が好ましく、５／１以下がさらに好ましく、２／１以下がよりさらに好ましい。また、第２の端縁２２の欠損を抑制するという観点から、長さＬ２と間隔Ｄ２との比（Ｌ２／Ｄ２）は、１／５以上が好ましく、１／３以上が好ましく、１／１以上がよりさらに好ましい。 The multiple detection target films 4 may be arranged side by side at intervals along the second direction X2, and the size of the detection target film 4 arranged adjacent to the second edge 22 and the interval between adjacent detection target films 4, 4 are not particularly limited. For example, the length of the detection target film 4 in the second direction X2 and the interval between adjacent detection target films 4, 4 can be appropriately set from the viewpoint of suppressing a decrease in the flexibility of the sheet-like substrate 2 at the second edge 22 and from the viewpoint of suppressing damage to the second edge 22. For example, in the adhesive tape 1 of the first embodiment of FIG. 2, from the viewpoint of suppressing a decrease in the flexibility of the sheet-like substrate 2, the ratio (L2/D2) of the length L2 of the detection target film 4 in the second direction X2 to the interval D2 between adjacent detection target films 4, 4 is preferably 10/1 or less, more preferably 5/1 or less, and even more preferably 2/1 or less. In addition, from the viewpoint of suppressing damage to the second edge 22, the ratio of the length L2 to the distance D2 (L2/D2) is preferably 1/5 or more, more preferably 1/3 or more, and even more preferably 1/1 or more.

複数の検知対象膜４は、たとえば、図４に示される第２実施形態の粘着テープ１０のように、第２の方向Ｘ２におけるシート状基材２の全長に亘る、第２の方向Ｘ２に沿った任意の線上に、複数の検知対象膜４のうち少なくとも１つが存在するように、シート状基材２の表面上に配置されてもよい。そのように検知対象膜４が配置されることで、第２の方向Ｘ２に沿って粘着テープ１０が第１の方向Ｘ１のいずれの位置で切断されても、少なくとも１つの検知対象膜４が切断されて、切断端縁に隣接して少なくとも１つの検知対象膜４が配置されることになる。これにより、粘着テープ１０を第２の方向Ｘ２に沿って切断する限り、第１の方向Ｘ１のいずれの位置で切断しても、切断端縁に隣接して配置される検知対象膜４によって、切断端縁の欠損が抑制される。したがって、粘着テープ１０の第１の方向Ｘ１の長さを自在に調節することができる。なお、第２の方向Ｘ２だけでなく、第２の方向Ｘ２から傾斜した任意の方向に沿った任意の線上に、複数の検知対象膜４のうち少なくとも１つが存在するように、複数の検知対象膜４がシート状基材２の表面上に配置されてもよい。 For example, as in the adhesive tape 10 of the second embodiment shown in FIG. 4, the multiple detection target films 4 may be arranged on the surface of the sheet-like substrate 2 so that at least one of the multiple detection target films 4 is present on any line along the second direction X2 over the entire length of the sheet-like substrate 2 in the second direction X2. By arranging the detection target films 4 in this manner, even if the adhesive tape 10 is cut at any position in the first direction X1 along the second direction X2, at least one detection target film 4 is cut and at least one detection target film 4 is arranged adjacent to the cut edge. As a result, as long as the adhesive tape 10 is cut along the second direction X2, even if it is cut at any position in the first direction X1, damage to the cut edge is suppressed by the detection target film 4 arranged adjacent to the cut edge. Therefore, the length of the adhesive tape 10 in the first direction X1 can be freely adjusted. In addition, the multiple detection target films 4 may be arranged on the surface of the sheet-like substrate 2 so that at least one of the multiple detection target films 4 is present on any line along any direction inclined from the second direction X2, not just the second direction X2.

検知対象膜４は、シート状基材２の第２の方向Ｘ２に沿った任意の線上に少なくとも１つ設けられていればよく、配置される検知対象膜４の数や配置は特に限定されない。第２実施形態では、図４に示されるように、複数の検知対象膜４がそれぞれ、シート状基材２の第２の方向Ｘ２に沿った任意の線上で、第２の方向Ｘ２に沿って間隔を空けて並んで配置されている。このように複数の検知対象膜４が第２の方向Ｘ２に沿って間隔を空けて並んで配置されることで、第２の方向Ｘ２に沿って粘着テープ１０を第１の方向Ｘ１のいずれの位置で切断しても、切断端縁におけるシート状基材２の柔軟性の低下を抑制しながら、隣り合う検知対象膜４、４間の間隔以上の長さに亘る切断端縁の欠損を抑制することができる。 At least one detection target film 4 may be provided on any line along the second direction X2 of the sheet-like substrate 2, and the number and arrangement of the detection target films 4 to be arranged are not particularly limited. In the second embodiment, as shown in FIG. 4, a plurality of detection target films 4 are arranged at intervals along the second direction X2 on any line along the second direction X2 of the sheet-like substrate 2. By arranging a plurality of detection target films 4 at intervals along the second direction X2 in this manner, even if the adhesive tape 10 is cut along the second direction X2 at any position in the first direction X1, it is possible to suppress damage to the cut edge over a length equal to or greater than the interval between adjacent detection target films 4, 4 while suppressing a decrease in flexibility of the sheet-like substrate 2 at the cut edge.

第２実施形態の粘着テープ１０における複数の検知対象膜４は、図４に示されるように、第１の方向Ｘ１に対して傾斜する第３の方向Ｘ３に沿って複数の検知対象膜４が互いに第３の間隙Ｇ３を挟んで並んで配置される少なくとも１つの第３の列Ｒ３と、第３の方向Ｘ３に沿って複数の検知対象膜４が互いに第４の間隙Ｇ４を空けて並んで配置される少なくとも１つの第４の列Ｒ４とを備えている。第３および第４の列Ｒ３、Ｒ４は、図示された例では、第３の方向Ｘ３におけるシート状基材２の略全長に亘って延びている。また、第３および第４の列Ｒ３、Ｒ４は、第３の方向Ｘ３に略直交する第４の方向Ｘ４に沿って互いに間隔を空けて交互に配列されている。第３および第４の列Ｒ３、Ｒ４は、図示された例では、第４の方向Ｘ４におけるシート状基材２の略全長に亘って、第４の方向Ｘ４に沿って互いに間隔を空けて交互に配列されている。第３および第４の列Ｒ３、Ｒ４は、第３の列Ｒ３における全ての第３の間隙Ｇ３の第４の方向Ｘ４の延長線上に第４の列Ｒ４における検知対象膜４が存在し、第４の列Ｒ４における全ての第４の間隙Ｇ４の第４の方向Ｘ４の延長線上に第３の列Ｒ３における検知対象膜４が存在するように、第３の方向Ｘ３で互いに対してオフセットされて配置されている。ここで、第１の方向Ｘ１に対する第３の方向Ｘ３の角度は、第１の方向Ｘ１におけるシート状基材２の略全長に亘る、第１の方向Ｘ１に沿った任意の線上に、複数の検知対象膜４のうち少なくとも１つが存在し、第２の方向Ｘ２におけるシート状基材２の略全長に亘る、第２の方向Ｘ２に沿った任意の線上に、複数の検知対象膜４のうち少なくとも１つが存在するように、画定される。第２実施形態の粘着テープ１０では、このように複数の検知対象膜４がシート状基材２の表面上に配置されることで、第１および第２の方向Ｘ１、Ｘ２のそれぞれに沿った任意の線上に検知対象膜４が存在することになる。したがって、第１の方向Ｘ１に沿って粘着テープ１０が第２の方向Ｘ２のいずれの位置で切断されても、また、第２の方向Ｘ２に沿って粘着テープ１０が第１の方向Ｘ１のいずれの位置で切断されても、検知対象膜４が切断されて、切断端縁に隣接して配置される検知対象膜４によって、切断端縁の欠損が抑制される。 4, the plurality of detection target films 4 in the adhesive tape 10 of the second embodiment include at least one third row R3 in which the plurality of detection target films 4 are arranged side by side with a third gap G3 between them along a third direction X3 inclined with respect to the first direction X1, and at least one fourth row R4 in which the plurality of detection target films 4 are arranged side by side with a fourth gap G4 between them along the third direction X3. In the illustrated example, the third and fourth rows R3, R4 extend over substantially the entire length of the sheet-like substrate 2 in the third direction X3. In addition, the third and fourth rows R3, R4 are alternately arranged at intervals from each other along a fourth direction X4 that is substantially perpendicular to the third direction X3. In the illustrated example, the third and fourth rows R3, R4 are alternately arranged at intervals from each other along the fourth direction X4 over substantially the entire length of the sheet-like substrate 2 in the fourth direction X4. The third and fourth rows R3, R4 are offset from each other in the third direction X3 such that the detection target membranes 4 in the fourth row R4 are present on the extensions of the fourth direction X4 of all the third gaps G3 in the third row R3, and the detection target membranes 4 in the third row R3 are present on the extensions of the fourth direction X4 of all the fourth gaps G4 in the fourth row R4. Here, the angle of the third direction X3 with respect to the first direction X1 is defined such that at least one of the multiple detection target membranes 4 is present on any line along the first direction X1 that spans substantially the entire length of the sheet-like substrate 2 in the first direction X1, and at least one of the multiple detection target membranes 4 is present on any line along the second direction X2 that spans substantially the entire length of the sheet-like substrate 2 in the second direction X2. In the adhesive tape 10 of the second embodiment, by arranging a plurality of detection target films 4 on the surface of the sheet-like substrate 2 in this manner, the detection target films 4 are present on any line along each of the first and second directions X1 and X2. Therefore, no matter where the adhesive tape 10 is cut in the second direction X2 along the first direction X1, or where the adhesive tape 10 is cut in the first direction X1 along the second direction X2, the detection target films 4 are cut, and damage to the cut edge is suppressed by the detection target films 4 arranged adjacent to the cut edge.

第２実施形態の粘着テープ１０では、図４に示されるように、第３および第４の列Ｒ３、Ｒ４の両方において、同じ形状（上面視で略正四角形）および同じ大きさの検知対象膜４が、第３および第４の方向Ｘ３、Ｘ４に沿ってともに同じ大きさの間隙Ｇ３、Ｇ４を挟んで並んで配置されている。そして、第３および第４の列Ｒ３、Ｒ４は、第４の方向Ｘ４に沿って互いに同じ間隔を空けて交互に繰り返して配列されている。このような配置では、たとえば、シート状基材２の第３の方向Ｘ３の柔軟性の低下を抑制するという観点から、検知対象膜４の第３の方向Ｘ３における長さと、間隙Ｇ３、Ｇ４の第３の方向Ｘ３における長さとの比（検知対象膜の長さ／間隙の長さ）は、１０／１以下が好ましく、５／１以下がさらに好ましく、２／１以下がよりさらに好ましい。また、シート状基材２の第３の方向Ｘ３の強度を高めるという観点から、上記比は、１／５以上が好ましく、１／３以上が好ましく、１／１以上がよりさらに好ましい。また、シート状基材２の第４の方向Ｘ４の柔軟性の低下を抑制するという観点から、検知対象膜４の第４の方向Ｘ４における長さと、第３の列Ｒ３と第４の列Ｒ４との間の間隔との比（検知対象膜の長さ／列間の間隔）は、１０／１以下が好ましく、５／１以下がさらに好ましく、２／１以下がよりさらに好ましい。また、シート状基材２の第４の方向Ｘ４の強度を高めるという観点から、上記比は、１／５以上が好ましく、１／３以上が好ましく、１／１以上がよりさらに好ましい。ただし、複数の検知対象膜４が上述したいくつかの説明のようにシート状基材２の表面上に配置されていれば、検知対象膜４の形状や大きさ、間隙Ｇ３、Ｇ４の大きさ、第３の列Ｒ３と第４の列Ｒ４との間の間隔は、特に限定されることはない。たとえば、検知対象膜４の形状は、上面視で略正四角形以外にも、上面視で略三角形や略円形などであってもよい。また、検知対象膜４の大きさは、それぞれの列内で異なっていてもよいし、列間で互いに異なっていてもよい。また、間隙Ｇ３、Ｇ４の大きさも、列内で異なっていてもよいし、列間で互いに異なっていてもよい。また、それぞれの列は、互いに異なる間隔を空けて交互に繰り返して配列されても構わない。 In the adhesive tape 10 of the second embodiment, as shown in FIG. 4, in both the third and fourth rows R3, R4, the detection target membranes 4 having the same shape (approximately a regular square in a top view) and the same size are arranged side by side with gaps G3, G4 of the same size in the third and fourth directions X3, X4. The third and fourth rows R3, R4 are arranged alternately and repeatedly at the same intervals along the fourth direction X4. In such an arrangement, for example, from the viewpoint of suppressing a decrease in the flexibility of the sheet-like substrate 2 in the third direction X3, the ratio of the length of the detection target membrane 4 in the third direction X3 to the length of the gaps G3, G4 in the third direction X3 (length of the detection target membrane/length of the gap) is preferably 10/1 or less, more preferably 5/1 or less, and even more preferably 2/1 or less. In addition, from the viewpoint of increasing the strength of the sheet-like substrate 2 in the third direction X3, the above ratio is preferably 1/5 or more, preferably 1/3 or more, and more preferably 1/1 or more. In addition, from the viewpoint of suppressing the decrease in flexibility of the sheet-like substrate 2 in the fourth direction X4, the ratio of the length of the detection target film 4 in the fourth direction X4 to the interval between the third row R3 and the fourth row R4 (length of detection target film/interval between rows) is preferably 10/1 or less, more preferably 5/1 or less, and more preferably 2/1 or less. In addition, from the viewpoint of increasing the strength of the sheet-like substrate 2 in the fourth direction X4, the above ratio is preferably 1/5 or more, preferably 1/3 or more, and more preferably 1/1 or more. However, as long as a plurality of detection target films 4 are arranged on the surface of the sheet-like substrate 2 as in some of the above-mentioned explanations, the shape and size of the detection target film 4, the size of the gaps G3 and G4, and the interval between the third row R3 and the fourth row R4 are not particularly limited. For example, the shape of the detection target membrane 4 may be a substantially square shape when viewed from above, or may be a substantially triangular shape or a substantially circular shape when viewed from above. The size of the detection target membrane 4 may be different within each row, or may be different between rows. The sizes of the gaps G3 and G4 may also be different within each row, or may be different between rows. The rows may be arranged alternately and repeatedly with different intervals between each row.

１、１０粘着テープ
２シート状基材
２１第１の端縁
２２第２の端縁
３粘着剤層
４検知対象膜
４１結合材
４２検知対象材
Ｄ１、Ｄ２第１の方向における検知対象膜間の間隔
Ｇ１～Ｇ４第１～第４の間隙
Ｌ１、Ｌ２第１の方向における検知対象膜の長さ
Ｒ１～Ｒ４第１～第４の列
Ｘ１～Ｘ４第１～第４の方向 REFERENCE SIGNS LIST 1, 10 Adhesive tape 2 Sheet-like substrate 21 First edge 22 Second edge 3 Adhesive layer 4 Film to be detected 41 Binder 42 Material to be detected D1, D2 Distance between films to be detected in first direction G1 to G4 First to fourth gaps L1, L2 Length of film to be detected in first direction R1 to R4 First to fourth rows X1 to X4 First to fourth directions

Claims

A sheet-like substrate having flexibility and breathability;
A pressure-sensitive adhesive layer provided on a surface of the sheet-like substrate;
A pressure-sensitive adhesive tape comprising a plurality of detection target films provided on a surface of the sheet-like substrate,
The sheet-like substrate has a first edge extending along a first direction,
The plurality of detection target films are disposed in a dispersed manner at intervals on the surface of the sheet-like substrate,
the target film includes a binder and a target material;
At least one of the plurality of detection target films is disposed adjacent to the first edge of the sheet-like substrate ;
The plurality of detection target films are arranged on the surface of the sheet-like substrate such that at least one of the plurality of detection target films is present on any line along the first direction over substantially the entire length of the sheet-like substrate in the first direction .
Adhesive tape.

The sheet-like substrate has a second edge extending along a second direction substantially perpendicular to the first direction,
At least one of the plurality of detection target films is disposed adjacent to the second edge of the sheet-like substrate.
The adhesive tape according to claim 1 .

The plurality of detection target films are arranged on the surface of the sheet-like substrate such that at least one of the plurality of detection target films is present on any line along the second direction, the line extending over substantially the entire length of the sheet-like substrate in the second direction, the second direction being substantially perpendicular to the first direction.
The adhesive tape according to claim 1 or 2 .

The plurality of detection target films include
at least one first row in which a plurality of detection target films are arranged side by side with a first gap between them along a second direction substantially perpendicular to the first direction ;
at least one second row in which a plurality of detection target films are arranged side by side with second gaps between them along the second direction;
the first and second rows are alternately arranged at intervals along the first direction;
the first and second rows are arranged offset from each other in the second direction such that the detection target membrane in the second row is present on an extension line of all the first gaps in the first row in the first direction, and the detection target membrane in the first row is present on an extension line of all the second gaps in the second row in the first direction.
The adhesive tape according to claim 1 or 2 .

The plurality of detection target films include
at least one third row in which a plurality of detection target films are arranged side by side with a third gap between them along a third direction inclined with respect to the first direction X1;
at least one fourth row in which a plurality of detection target films are arranged side by side with a fourth gap between them along the third direction;
the third and fourth rows are alternately arranged at intervals from each other along a fourth direction substantially perpendicular to the third direction,
the third and fourth rows are arranged offset from each other in the third direction such that the detection target membrane in the fourth row is present on an extension line of all the third gaps in the third row in the fourth direction, and the detection target membrane in the third row is present on an extension line of all the fourth gaps in the fourth row in the fourth direction;
The angle of the third direction with respect to the first direction is
At least one of the plurality of detection target films is present on an arbitrary line along the first direction over substantially the entire length of the sheet-like substrate in the first direction,
At least one of the plurality of detection target films is present on an arbitrary line along a second direction that is substantially perpendicular to the first direction and extends over substantially the entire length of the sheet-like substrate in the second direction.
To be defined,
The pressure-sensitive adhesive tape according to any one of claims 1 to 3 .

The sheet-like substrate is a woven fabric woven with warp yarns extending in the first direction and weft yarns extending in a second direction substantially perpendicular to the first direction.
The pressure-sensitive adhesive tape according to any one of claims 1 to 5 .

The binder is a thermosetting resin,
The detection target material is a magnetic powder or a tungsten powder.
The pressure-sensitive adhesive tape according to any one of claims 1 to 6 .

A sheet-like substrate having flexibility and breathability;
A pressure-sensitive adhesive layer provided on a surface of the sheet-like substrate;
A plurality of detection target films provided on the surface of the sheet-like substrate;
An adhesive tape comprising:
The sheet-like substrate has a first edge extending along a first direction,
The plurality of detection target films are disposed in a dispersed manner at intervals on the surface of the sheet-like substrate,
the target film includes a binder and a target material;
At least one of the plurality of detection target films is disposed adjacent to the first edge of the sheet-like substrate;
The plurality of detection target films are arranged on the surface of the sheet-like substrate such that at least one of the plurality of detection target films is present on any line along the second direction, the line extending over substantially the entire length of the sheet-like substrate in the second direction, the second direction being substantially perpendicular to the first direction.
Adhesive tape.

A sheet-like substrate having flexibility and breathability;
A pressure-sensitive adhesive layer provided on a surface of the sheet-like substrate;
A plurality of detection target films provided on the surface of the sheet-like substrate;
An adhesive tape comprising:
The sheet-like substrate has a first edge extending along a first direction,
The plurality of detection target films are disposed in a dispersed manner at intervals on the surface of the sheet-like substrate,
the target film includes a binder and a target material;
At least one of the plurality of detection target films is disposed adjacent to the first edge of the sheet-like substrate;
The plurality of detection target films include
at least one first row in which a plurality of detection target films are arranged side by side with a first gap between them along a second direction substantially perpendicular to the first direction;
at least one second row in which a plurality of detection target films are arranged side by side with a second gap between them along the second direction;
Equipped with
the first and second rows are alternately arranged at intervals along the first direction;
the first and second rows are arranged offset from each other in the second direction such that the detection target membrane in the second row is present on an extension line of all the first gaps in the first row in the first direction, and the detection target membrane in the first row is present on an extension line of all the second gaps in the second row in the first direction.
Adhesive tape.

A sheet-like substrate having flexibility and breathability;
A pressure-sensitive adhesive layer provided on a surface of the sheet-like substrate;
A plurality of detection target films provided on the surface of the sheet-like substrate;
An adhesive tape comprising:
The sheet-like substrate has a first edge extending along a first direction,
The plurality of detection target films are disposed in a dispersed manner at intervals on the surface of the sheet-like substrate,
the target film includes a binder and a target material;
At least one of the plurality of detection target films is disposed adjacent to the first edge of the sheet-like substrate;
The plurality of detection target films include
at least one third row in which a plurality of detection target films are arranged side by side with a third gap between them along a third direction inclined with respect to the first direction X1;
at least one fourth row in which a plurality of detection target films are arranged side by side with a fourth gap between them along the third direction;
Equipped with
the third and fourth rows are alternately arranged at intervals from each other along a fourth direction substantially perpendicular to the third direction,
the third and fourth rows are arranged offset from each other in the third direction such that the detection target membrane in the fourth row is present on an extension line of all the third gaps in the third row in the fourth direction, and the detection target membrane in the third row is present on an extension line of all the fourth gaps in the fourth row in the fourth direction;
The angle of the third direction with respect to the first direction is
At least one of the plurality of detection target films is present on an arbitrary line along the first direction over substantially the entire length of the sheet-like substrate in the first direction,
At least one of the plurality of detection target films is present on an arbitrary line along a second direction that is substantially perpendicular to the first direction and extends over substantially the entire length of the sheet-like substrate in the second direction.
To be defined,
Adhesive tape.