JP7689676B2 - Decorative sheet - Google Patents
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- JP7689676B2 JP7689676B2 JP2024050629A JP2024050629A JP7689676B2 JP 7689676 B2 JP7689676 B2 JP 7689676B2 JP 2024050629 A JP2024050629 A JP 2024050629A JP 2024050629 A JP2024050629 A JP 2024050629A JP 7689676 B2 JP7689676 B2 JP 7689676B2
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Description
本発明は、含浸された化粧水液が徐々に放出する化粧シートに関し、特にフェイスマスクやクレンジングシート等の化粧シートに関するものである。 The present invention relates to a cosmetic sheet that gradually releases the lotion liquid impregnated in it, and in particular to cosmetic sheets such as face masks and cleansing sheets.
従来より、クレンジングシート等の化粧シートの基布として不織布が用いられている。たとえば、特許文献１には、中間層が熱可塑性合成短繊維群で構成された短繊維不織布よりなり、両外層が親水性短繊維群で構成された三層構造不織布を清拭シートとして用いることが提案されている。そして、この清拭シートに清拭用液体を含浸させ、身体等を拭き取って清浄するのである。この清拭シートは、外層が親水性短繊維群で形成されているため、含浸させた清拭用液体が直ちに外層に移行し、速やかな拭き取りが可能となり、好ましいものである。しかしながら、クレンジングシート等の化粧シートの基布という用途では、一回目の拭き取りによって、清拭用液体である化粧水液の多くが消費されてしまい、二回目以降、特に三回目以降では化粧水液による拭き取りができなくなるという問題があった。 Conventionally, nonwoven fabrics have been used as the base fabric of cosmetic sheets such as cleansing sheets. For example, Patent Document 1 proposes the use of a three-layered nonwoven fabric, in which the middle layer is made of a short fiber nonwoven fabric composed of a group of thermoplastic synthetic short fibers, and both outer layers are made of a group of hydrophilic short fibers, as a wiping sheet. This wiping sheet is then impregnated with a wiping liquid, and the body or the like is wiped and cleaned. This wiping sheet is preferable because the outer layer is formed of a group of hydrophilic short fibers, and the impregnated wiping liquid immediately migrates to the outer layer, enabling rapid wiping. However, when used as the base fabric of cosmetic sheets such as cleansing sheets, the first wiping consumes much of the lotion liquid, which is the wiping liquid, and the second and subsequent wipings, especially the third and subsequent wipings, are unable to be wiped off with the lotion liquid.
本発明の課題は、含浸された化粧水液を直ちに放出させず、徐々に放出させうる不織布よりなる化粧シートを提供することにある。 The objective of the present invention is to provide a cosmetic sheet made of nonwoven fabric that does not immediately release the lotion liquid it is impregnated with, but rather allows it to be released gradually.
本発明は、不織布の外層に特定の長繊維不織布を採用することにより、上記課題を解決したものである。すなわち、本発明は、化粧シートの基布に化粧水液を含浸した化粧シートにおいて、前記基布は、らせん状に捲縮した偏心芯鞘型複合長繊維よりなる疎水性捲縮複合長繊維群で構成され、該疎水性捲縮複合長繊維相互間が自己融着により結合している部位を含む、嵩密度が０．０１～０．０８ｇ／ｃｍ3の長繊維不織布を外層とするか、又は疎水性伸縮性長繊維群で構成され、該疎水性伸縮性長繊維相互間は疎水性熱融着性長繊維の融着により結合している部位を含む長繊維不織布を外層とし、該長繊維不織布に交絡している親水性短繊維群で構成された内層とよりなる、目付２５～８０ｇ／ｍ2の積層長繊維不織布よりなり、前記基布にその目付に対して６倍の化粧水を含浸させたとき、外層側からの化粧水全放出率は５０％未満であって、かつ、化粧水初期放出率は５０～７０％であることを特徴とする化粧シートに関するものである。 The present invention has solved the above-mentioned problems by employing a specific long-fiber nonwoven fabric for the outer layer of the nonwoven fabric. That is, the present invention relates to a decorative sheet in which a base fabric of the decorative sheet is impregnated with a lotion liquid, the base fabric having a bulk density of 25 to 80 g/m3 and comprising an outer layer of a long-fiber nonwoven fabric composed of a group of hydrophobic crimped conjugated long fibers made of eccentric core-sheath type conjugated long fibers that are helically crimped and including sites where the hydrophobic crimped conjugated long fibers are bonded to each other by self-fusion, or an outer layer of a long - fiber nonwoven fabric composed of a group of hydrophobic stretchable long fibers and including sites where the hydrophobic stretchable long fibers are bonded to each other by fusion of hydrophobic heat-fusible long fibers, and an inner layer composed of a group of hydrophilic short fibers that are intertwined with the long-fiber nonwoven fabric, The present invention relates to a decorative sheet comprising a laminated long-fiber nonwoven fabric of No. 2 , characterized in that when the base fabric is impregnated with a lotion in an amount six times the basis weight of the base fabric, the total release rate of the lotion from the outer layer side is less than 50% and the initial release rate of the lotion is 50 to 70%.
［本発明の用語の説明］
本発明でいう積層長繊維不織布の「外層」とは、液を付与する対象面に当接する層をいい、「内層」とはこの対象面に当接しない層をいう。したがって、積層長繊維不織布が二層積層物であっても、外層と内層とが存在する。
本発明でいう「化粧水」とは、有効成分としてアルブチンを含み、その他の成分としてヒアルロン酸Ｎａ－２、加水分解ヒアルロン酸（ナノ化ヒアルロン酸）、ビタミンＣリン酸Ｍｇ、ビタミンＥ、ヨクイニンエキス（ハトムギエキス）、ＢＧ、濃グリセリン、ソルビット液、ＰＯＰメチルグルコシド、コハク酸２Ｎａ、コハク酸、ＶＰ－スチレン共重合体エマルション及びラウリン酸ＰＯＥ（２０）ソルビタン及びパラベンを含み、残部が水よりなるものである。具体的には、ロート製薬株式会社製の商品名「肌ラボ白潤薬用美白化粧水」のことである。
[Explanation of terms used in the present invention]
In the present invention, the "outer layer" of the laminated long-fiber nonwoven fabric refers to the layer that contacts the surface to which the liquid is applied, and the "inner layer" refers to the layer that does not contact the surface. Therefore, even if the laminated long-fiber nonwoven fabric is a two-layer laminate, it has an outer layer and an inner layer.
The "lotion" in the present invention is one that contains arbutin as an active ingredient, and other ingredients such as sodium hyaluronate-2, hydrolyzed hyaluronic acid (nanoized hyaluronic acid), magnesium vitamin C phosphate, vitamin E, coix seed extract (jobi barley extract), BG, concentrated glycerin, sorbitol solution, POP methyl glucoside, disodium succinate, succinic acid, VP-styrene copolymer emulsion, POE (20) sorbitan laurate, and paraben, with the balance being water. Specifically, it is the product name "Hada Labo Shirojun Medicinal Whitening Lotion" manufactured by Rohto Pharmaceutical Co., Ltd.
本発明でいう「外層側からの化粧水全放出率」及び「化粧水初期放出率」とは、以下の手順で測定及び算出されるものである。
（１）縦１００ｍｍ×横１５０ｍｍの積層長繊維不織布を準備する。
（２）内層を内側にして積層長繊維不織布を横方向に二つ折りし、縦１００ｍｍ×横７５ｍｍートの試験体を準備する。この試験体の表裏面は外層が露出している。
（３）試験体の重量を測定する。重量をｘｇとする。
（４）試験体に６ｘｇの化粧水を滴下し、含浸試験体を得る。この含浸試験体の重量は７ｘｇである。
（５）アクリル製下敷板の上に含浸試験体を置き、含浸試験体の上に同サイズの濾紙（アドバンテック Ｎｏ２）を二枚置き、さらに濾紙の上に同サイズのアクリル板を置く。
（６）アクリル板の上に、５００ｇの分銅を載せる。
（７）５秒静置後、分銅、アクリル板及び濾紙を取り除き、含浸試験体の重量を測定するこの重量をａｇとし、（７ｘ－ａ）ｇが一回目の液放出量となる。
（８）上記（７）の含浸試験体を用い、上記（５）～（７）を操作を行って、含浸試験体の重量を測定し、この重量をｂｇとする。（７ｘ－ｂ）ｇが二回目の液放出量となる。
（９）上記（８）の含浸試験体を用い、上記（５）～（７）を操作を行って、含浸試験体の重量を測定し、この重量をｃｇとする。（７ｘ－ｃ）ｇが三回目の液放出量となる。
（１０）以上の測定を行い、以下の式で算出される値が「外層側からの化粧水全放出率」及び「化粧水初期放出率」である。
外層側からの化粧水全放出率（％）＝［（７ｘ－ｃ）／６ｘ］×１００
化粧水初期放出率（％）＝［（７ｘ－ａ）／（７ｘ－ｃ）］×１００
The "total lotion release rate from the outer layer side" and the "initial lotion release rate" in the present invention are measured and calculated by the following procedure.
(1) Prepare a laminated long fiber nonwoven fabric measuring 100 mm in length and 150 mm in width.
(2) The laminated long fiber nonwoven fabric is folded in half horizontally with the inner layer on the inside to prepare a test specimen measuring 100 mm long x 75 mm wide. The outer layer is exposed on both sides of this test specimen.
(3) Measure the weight of the test specimen. The weight is defined as x g.
(4) 6×g of lotion is dropped onto the test piece to obtain an impregnated test piece, the weight of which is 7×g.
(5) Place the impregnated test specimen on an acrylic underlay, place two sheets of filter paper of the same size (Advantech No. 2) on the impregnated test specimen, and then place an acrylic plate of the same size on the filter papers.
(6) Place a 500g weight on the acrylic plate.
(7) After leaving it to stand for 5 seconds, remove the weight, acrylic plate and filter paper, and measure the weight of the impregnated test piece. This weight is defined as ag, and (7x-a)g is the amount of liquid released in the first time.
(8) Using the impregnated test specimen of (7) above, carry out the procedures of (5) to (7) above, measure the weight of the impregnated test specimen, and let this weight be b g. (7x-b) g is the amount of liquid discharged the second time.
(9) Using the impregnated test specimen of (8) above, carry out the procedures of (5) to (7) above, measure the weight of the impregnated test specimen, and call this weight c g. (7x-c) g is the amount of liquid discharged the third time.
(10) After carrying out the above measurements, the values calculated by the following formula are the "total lotion release rate from the outer layer side" and the "initial lotion release rate".
Total release rate of lotion from outer layer (%) = [(7x - c) / 6x] x 100
Lotion initial release rate (%) = [(7x-a)/(7x-c)] x 100
本発明で用いる積層長繊維不織布の外層を構成する長繊維不織布としては、らせん状に捲縮した偏心芯鞘型複合長繊維よりなる疎水性捲縮複合長繊維群で構成されたもの、又は疎水性伸縮性長繊維群で構成されたものが用いられる。まず、疎水性捲縮複合長繊維群で構成されたものについて説明する。疎水性捲縮複合長繊維は、ポリオレフィン、ポリエステル又はポリアミド等の疎水性合成樹脂を素材とする偏心芯鞘型複合長繊維よりなる。偏心芯鞘型複合長繊維は、芯成分と鞘成分とで冷却時収縮率の異なる疎水性合成樹脂を用い、複合溶融紡糸した後に冷却すると、らせん状の捲縮が発現する。らせん状の捲縮はバネ状の伸縮性を示し、嵩密度が０．０１～０．０８ｇ／ｃｍ3の嵩高な長繊維不織布を得ることができる。捲縮が発現した複合長繊維群をコンベア等の捕集体に捕集することにより、長繊維ウェブが形成される。そして、この長繊維ウェブを構成する複合長繊維群に部分的に加熱及び加圧を施すことにより、鞘成分を軟化又は溶融させて、複合長繊維相互間を自己融着させて、疎水性捲縮複合長繊維群で構成された嵩密度が０．０１～０．０８ｇ／ｃｍ3の長繊維不織布が得られる。 The continuous fiber nonwoven fabric constituting the outer layer of the laminated continuous fiber nonwoven fabric used in the present invention may be one constituted by a group of hydrophobic crimped conjugated continuous fibers made of eccentric core-sheath type conjugated continuous fibers that are helically crimped, or one constituted by a group of hydrophobic stretchable continuous fibers. First, the one constituted by a group of hydrophobic crimped conjugated continuous fibers will be described. The hydrophobic crimped conjugated continuous fibers are made of eccentric core-sheath type conjugated continuous fibers made of hydrophobic synthetic resins such as polyolefin, polyester, or polyamide. The eccentric core-sheath type conjugated continuous fibers are made of hydrophobic synthetic resins whose core and sheath components have different shrinkage rates upon cooling, and when cooled after conjugated melt spinning, they develop helical crimp. The helical crimp exhibits spring-like stretchability, and a bulky continuous fiber nonwoven fabric with a bulk density of 0.01 to 0.08 g/cm 3 can be obtained. The conjugated continuous fibers that have developed crimps are collected on a collector such as a conveyor to form a continuous fiber web. The conjugated long fibers constituting the long-fiber web are then partially heated and pressurized to soften or melt the sheath components and cause self-fusion between the conjugated long fibers, thereby obtaining a long-fiber nonwoven fabric composed of hydrophobic crimped conjugated long fibers and having a bulk density of 0.01 to 0.08 g/ cm3 .
次に、疎水性伸縮性長繊維群で構成された長繊維不織布について説明する。疎水性伸縮性長繊維としては、疎水性ポリウレタン等の疎水性エラストマー樹脂を溶融紡糸することにより、得られる。かかる疎水性伸縮性長繊維は、素材である疎水性エラストマー樹脂が架橋している場合もあり、粘着性はあるが融着しにくい傾向がある。したがって、疎水性伸縮性長繊維群中に、エラストマー樹脂を素材としない合成樹脂よりなる疎水性熱融着性長繊維を混合しておく。疎水性伸縮性長繊維と疎水性熱融着性長繊維の混合割合は、質量比で、疎水性伸縮性長繊維：疎水性熱融着性長繊維＝１０～９０：９０～１０（％）であるのが好ましい。疎水性熱融着性長繊維の素材である合成樹脂としては、一般的には、ポリオレフィン、ポリエステル又はポリアミド等の疎水性合成樹脂が用いられる。疎水性伸縮性長繊維群で構成された長繊維不織布は、疎水性伸縮性長繊維群を溶融紡糸すると共に疎水性熱融着性長繊維群も溶融紡糸して、両者を混合した長繊維ウェブを形成する。そして、この長繊維ウェブに部分的に加熱及び加圧を施すことにより、疎水性熱融着性長繊維を軟化又は溶融させて、疎水性伸縮性長繊維相互間を融着させて、疎水性伸縮性長繊維群で構成された長繊維不織布が得られる。 Next, a long-fiber nonwoven fabric composed of a group of hydrophobic elastic long fibers will be described. The hydrophobic elastic long fibers are obtained by melt spinning hydrophobic elastomer resins such as hydrophobic polyurethane. Such hydrophobic elastic long fibers may be crosslinked from the hydrophobic elastomer resins that are the raw material, and although they are sticky, they tend not to fuse easily. Therefore, hydrophobic heat-sealing long fibers made of synthetic resins that do not use elastomer resins as the raw material are mixed into the group of hydrophobic elastic long fibers. The mixing ratio of the hydrophobic elastic long fibers and the hydrophobic heat-sealing long fibers is preferably hydrophobic elastic long fibers: hydrophobic heat-sealing long fibers = 10-90: 90-10 (%) by mass ratio. As the synthetic resin that is the raw material of the hydrophobic heat-sealing long fibers, hydrophobic synthetic resins such as polyolefin, polyester, or polyamide are generally used. A long-fiber nonwoven fabric made of hydrophobic stretchable long fibers is formed by melt-spinning the hydrophobic stretchable long fibers and the hydrophobic heat-fusible long fibers together to form a long-fiber web in which both are mixed. Then, by partially applying heat and pressure to this long-fiber web, the hydrophobic heat-fusible long fibers are softened or melted, and the hydrophobic stretchable long fibers are fused together to obtain a long-fiber nonwoven fabric made of hydrophobic stretchable long fibers.
上記した長繊維不織布に親水性短繊維群を交絡させて、長繊維不織布を外層とし親水性短繊維群を内層とする積層長繊維不織布とする。親水性短繊維としては、コットン繊維、レーヨン繊維又はリヨセル繊維等のセルロース系繊維を採用することができる。親水性短繊維群を長繊維不織布に交絡させるには、親水性短繊維群をカード法等で開繊集積してシート状にした短繊維ウェブを、長繊維不織布上に積層した後、高圧水流処理を施せばよい。 The above-mentioned long-fiber nonwoven fabric is entangled with hydrophilic short fibers to form a laminated long-fiber nonwoven fabric with the long-fiber nonwoven fabric as the outer layer and the hydrophilic short fiber group as the inner layer. As the hydrophilic short fibers, cellulosic fibers such as cotton, rayon, or lyocell can be used. To entangle the hydrophilic short fibers with the long-fiber nonwoven fabric, a short fiber web formed by opening and accumulating the hydrophilic short fibers by a carding method or the like to form a sheet is laminated on the long-fiber nonwoven fabric, and then a high-pressure water flow treatment is performed.
長繊維不織布の目付は１０～２０ｇ／ｍ2程度であるのが好ましい。また、内層となる親水性短繊維群の目付は１５～３０ｇ／ｍ2程度であるのが好ましい。したがって、積層長繊維不織布の目付は、二層積層物の場合は２５～５０ｇ／ｍ2程度であるのが好ましく、三層構造物の場合は４０～８０ｇ／ｍ2程度であるのが好ましい。積層長繊維不織布の目付が高すぎると、高価になると共に嵩高になり、商品価値が低下する傾向となる。また、積層長繊維不織布の目付が低すぎると、化粧水液含浸量の絶対値が低下し、商品価値が低下する傾向となる。なお、積層長繊維不織布の嵩密度は、０．０７～０．１５ｇ／ｃｍ3程度である。 The basis weight of the long fiber nonwoven fabric is preferably about 10 to 20 g/ m2 . The basis weight of the hydrophilic short fiber group forming the inner layer is preferably about 15 to 30 g/ m2 . Therefore, the basis weight of the laminated long fiber nonwoven fabric is preferably about 25 to 50 g/ m2 in the case of a two-layer laminate, and about 40 to 80 g/ m2 in the case of a three-layer structure. If the basis weight of the laminated long fiber nonwoven fabric is too high, it becomes expensive and bulky, and the commercial value tends to decrease. If the basis weight of the laminated long fiber nonwoven fabric is too low, the absolute value of the lotion liquid impregnation amount decreases, and the commercial value tends to decrease. The bulk density of the laminated long fiber nonwoven fabric is about 0.07 to 0.15 g/ cm3 .
積層長繊維不織布の外層を構成している長繊維不織布の目付、疎水性捲縮複合長繊維の捲縮数、疎水性伸縮性長繊維の伸縮力、融着部位の面積や個数及び親水性短繊維群の目付等を調整する。そして、外層側からの化粧水全放出率を５０％未満、より好ましくは３０～５０％とし、化粧水初期放出率を５０～７０％とすることにより、本発明に用いる化粧シートの基布が得られる。化粧水全放出率が５０％を超えると、四回目以降の拭き取り時において、化粧水液を対象面に付与しにくくなる。また、化粧水初期放出率が５０％未満であると、一回目の拭き取り時に化粧水液を十分に対象面に付与しにくくなる。逆に、化粧水初期放出率が７０％を超えると、一回目の拭き取り時に化粧水液が付与され過ぎて、その後の拭き取り時に化粧水液を対象面に付与しにくくなる。 The basis weight of the long fiber nonwoven fabric constituting the outer layer of the laminated long fiber nonwoven fabric, the number of crimps of the hydrophobic crimped composite long fiber, the elasticity of the hydrophobic elastic long fiber, the area and number of fused sites, and the basis weight of the hydrophilic short fiber group are adjusted. The base fabric of the decorative sheet used in the present invention is obtained by setting the total lotion release rate from the outer layer side to less than 50%, more preferably 30 to 50%, and the initial lotion release rate to 50 to 70%. If the total lotion release rate exceeds 50%, it becomes difficult to apply the lotion liquid to the target surface when wiping from the fourth time onwards. Also, if the initial lotion release rate is less than 50%, it becomes difficult to apply the lotion liquid sufficiently to the target surface when wiping for the first time. Conversely, if the initial lotion release rate exceeds 70%, too much lotion liquid is applied when wiping for the first time, making it difficult to apply the lotion liquid to the target surface when wiping thereafter.
本発明に用いる化粧シートの基布には、所望に応じて種々の後加工を施してもよい。たとえば、凹凸ロールを用いて賦型加工を施し伸縮性を付与した化粧シートの基布を用い、賦型加工された化粧シートとしてもよい。本発明に係る化粧シートは、フェイスマスク、クレンジングシート又は制汗シート等として用いられる。 The base fabric of the decorative sheet used in the present invention may be subjected to various post-processing processes as desired. For example, a base fabric of the decorative sheet may be subjected to shaping processing using an uneven roll to impart elasticity, and used to produce a shaping-processed decorative sheet. The decorative sheet according to the present invention may be used as a face mask, a cleansing sheet, an antiperspirant sheet, or the like.
本発明に係る化粧シートは、対象面に当接する外層の長繊維不織布が疎水性捲縮複合長繊維群又は疎水性伸縮性長繊維群で構成されているため、化粧水液を吸収保持しにくいが、ポンプ機能を有するものである。一方、内層の親水性短繊維群は化粧水液をよく吸収保持するものである。したがって、親水性短繊維群に吸収保持されている化粧水液が、外層のポンプ機能により徐々に放出されて対象面に付与されるという効果を奏する。また、長繊維不織布を具備しているため、短繊維のみで構成されているものに比べて、機械的強度に優れている。 The decorative sheet of the present invention has a pump function, although it does not absorb and retain lotion liquid well, because the long-fiber nonwoven fabric of the outer layer that contacts the target surface is composed of hydrophobic crimped composite long fibers or hydrophobic stretchable long fibers. On the other hand, the hydrophilic short fibers of the inner layer absorb and retain lotion liquid well. Therefore, the effect is that the lotion liquid absorbed and retained in the hydrophilic short fibers is gradually released by the pump function of the outer layer and applied to the target surface. In addition, because it is equipped with a long-fiber nonwoven fabric, it has superior mechanical strength compared to those composed only of short fibers.
実施例１
［疎水性捲縮複合長繊維群で構成され長繊維不織布の準備］
長繊維不織布として、三井化学株式会社製の嵩高スパンボンド不織布（目付１６ｇ／ｍ2、エンボス面積率１０％、嵩密度０．０７ｇ／ｃｍ3、縦方向の引張強度１９Ｎ／５ｃｍ、横方向の引張強度９Ｎ／５ｃｍ、縦方向の破断伸度６０％、横方向の破断伸度８０％）を準備した。この長繊維不織布を構成する長繊維は、芯成分がポリプロピレン重合体で鞘成分がプロピレン・エチレンランダム共重合体よりなる偏心芯鞘型複合長繊維であって、潜在捲縮が発現したらせん状捲縮複合長繊維である。捲縮複合長繊維の繊度は２．５デシテックスで捲縮数は２３個／２５ｍｍである。捲縮複合長繊維相互間は、エンボス部において、鞘成分により自己融着しているものである。
Example 1
[Preparation of a continuous fiber nonwoven fabric composed of hydrophobic crimped composite continuous fibers]
As the long-fiber nonwoven fabric, a bulky spunbonded nonwoven fabric (basis weight 16 g/ m2 , embossed area ratio 10%, bulk density 0.07 g/ cm3 , longitudinal tensile strength 19 N/5 cm, transverse tensile strength 9 N/5 cm, longitudinal breaking elongation 60%, transverse breaking elongation 80%) manufactured by Mitsui Chemicals, Inc. was prepared. The long fibers constituting this long-fiber nonwoven fabric are eccentric core-sheath type composite long fibers with a core component of polypropylene polymer and a sheath component of propylene-ethylene random copolymer, and are helical crimped composite long fibers in which latent crimping is expressed. The fineness of the crimped composite long fibers is 2.5 decitex and the number of crimps is 23/25 mm. The crimped composite long fibers are self-fused to each other by the sheath component in the embossed portion.
［化粧シートの基布の製造］
平均繊維長２５ｍｍの木綿繊維群を、パラレルカード機で開繊及び集積させて、目付２４ｇ／ｍ2の短繊維ウェブを得た。９０メッシュのプラスチック製織物からなるメッシュ状支持体よりなるコンベア上に長繊維不織布を載置し、さらに長繊維不織布上に短繊維ウェブを載置した。そして、ノズル孔径０．１ｍｍの噴出孔が孔間隔０．６ｍｍで横一列に配置された噴出装置を用い、短繊維ウェブ側に高圧水流を施した。噴出圧は、２ＭＰａの噴出圧力で１回予備処理した後、３ＭＰa で１回処理、４ＭＰａの噴出圧力で２回処理した。この処理により、木綿繊維群を長繊維不織布と交絡させた後、１２０℃で乾燥して、外層が長繊維不織布で内層が短繊維群よりなる、目付４０ｇ／ｍ2の化粧シートの基布を得た。
[Manufacture of decorative sheet base fabric]
Cotton fibers having an average fiber length of 25 mm were opened and accumulated by a parallel carding machine to obtain a staple fiber web having a basis weight of 24 g/ m2 . A long fiber nonwoven fabric was placed on a conveyer made of a mesh-like support made of a 90-mesh plastic woven fabric, and a staple fiber web was further placed on the long fiber nonwoven fabric. A high-pressure water stream was applied to the staple fiber web side using a spraying device having nozzles with a nozzle diameter of 0.1 mm arranged in a horizontal row with a hole interval of 0.6 mm. The spraying pressure was 2 MPa for one preliminary treatment, 3 MPa for one treatment, and 4 MPa for two treatments. The cotton fibers were entangled with the long fiber nonwoven fabric by this treatment, and then dried at 120°C to obtain a base fabric for a decorative sheet having a basis weight of 40 g/ m2 , the outer layer of which was made of a long fiber nonwoven fabric and the inner layer of which was made of a short fiber group.
実施例２
［疎水性捲縮複合長繊維群で構成され長繊維不織布の準備］
長繊維不織布として、三井化学株式会社製の嵩高スパンボンド不織布［目付２０ｇ／ｍ2、エンボス面積率１０％、嵩密度０．０６ｇ／ｃｍ3、縦方向の引張強度２４Ｎ／５ｃｍ、横方向の引張強度１１Ｎ／５ｃｍ、縦方向の破断伸度６０％、横方向の破断伸度６５％］を準備した。この長繊維不織布を構成している長繊維は、実施例１と同様のものであり、エンボス部において同様に自己融着しているものである。
Example 2
[Preparation of a continuous fiber nonwoven fabric composed of hydrophobic crimped composite continuous fibers]
As the long-fiber nonwoven fabric, a bulky spunbond nonwoven fabric [basis weight 20 g/ m2 , embossed area ratio 10%, bulk density 0.06 g/ cm3 , longitudinal tensile strength 24 N/5 cm, transverse tensile strength 11 N/5 cm, longitudinal breaking elongation 60%, transverse breaking elongation 65%] manufactured by Mitsui Chemicals, Inc. was prepared. The long fibers constituting this long-fiber nonwoven fabric were the same as those in Example 1, and were similarly self-fused in the embossed portions.
［化粧シートの基布の製造］
短繊維ウェブの目付を２０ｇ／ｍ2に変更した他は、実施例１と同様にして交絡処理し、目付４０ｇ／ｍ2の化粧シートの基布を得た。
[Manufacture of decorative sheet base fabric]
The same interlacing treatment as in Example 1 was carried out except that the basis weight of the staple fiber web was changed to 20 g/ m2 , to obtain a base fabric for a decorative sheet having a basis weight of 40 g/ m2 .
実施例３
［疎水性伸縮性長繊維群及び疎水性熱融着性長繊維群で構成され長繊維不織布の準備］
長繊維不織布として、三井化学株式会社製の混繊スパンボンド不織布（目付３０ｇ／ｍ2、エンボス面積率１８％、嵩密度０．０９ｇ／ｃｍ3、縦方向の引張強度２１Ｎ／５ｃｍ、横方向の引張強度１０Ｎ／５ｃｍ、縦方向の破断伸度１７０％、横方向の破断伸度１７０％）を準備した。この長繊維不織布は、疎水性ポリウレタン長繊維４７質量部とポリプロピレン長繊維５３質量部で構成されている。各長繊維相互間は、エンボス部において、ポリプロピレン長繊維によって融着され結合されている。
Example 3
[Preparation of a long-fiber nonwoven fabric composed of a group of hydrophobic elastic long fibers and a group of hydrophobic heat-fusible long fibers]
As the long-fiber nonwoven fabric, a mixed-fiber spunbond nonwoven fabric (basis weight 30 g/ m2 , embossed area ratio 18%, bulk density 0.09 g/ cm3 , longitudinal tensile strength 21 N/5 cm, transverse tensile strength 10 N/5 cm, longitudinal breaking elongation 170%, transverse breaking elongation 170%) manufactured by Mitsui Chemicals, Inc. was prepared. This long-fiber nonwoven fabric is composed of 47 parts by mass of hydrophobic polyurethane long fibers and 53 parts by mass of polypropylene long fibers. The long fibers are fused and bonded to each other by the polypropylene long fibers in the embossed portions.
［化粧シートの基布の製造］
短繊維ウェブの目付を１７ｇ／ｍ2に変更した他は、実施例１と同様にして交絡処理し、目付４７ｇ／ｍ2の化粧シートの基布を得た。
[Manufacture of decorative sheet base fabric]
The same interlacing treatment as in Example 1 was carried out except that the basis weight of the staple fiber web was changed to 17 g/ m2 , to obtain a base fabric for a decorative sheet having a basis weight of 47 g/ m2 .
実施例４
実施例３で得られた化粧シートの基布を、一対の凹凸ロール間に通して賦型加工を行った。凹凸ロールは、周方向に山部と谷部が走行しているものであり、山間のピッチが２．５ｍｍである。そして、一対の凹凸ロールは、一方の凹凸ロールの山部が他方の凹凸ロールの谷部と噛み合い、噛み合い深さが２．２ｍｍとなるように設置されてなるものである。この賦型加工を施した化粧シートの基布は、幅方向に良好な伸縮性を持つものであった。
Example 4
The base fabric of the decorative sheet obtained in Example 3 was passed between a pair of concave-convex rolls to carry out shaping processing. The concave-convex rolls have peaks and valleys running in the circumferential direction, with a peak-to-peak pitch of 2.5 mm. The pair of concave-convex rolls are installed so that the peaks of one of the concave-convex rolls mesh with the valleys of the other of the concave-convex rolls, with an intermeshing depth of 2.2 mm. The base fabric of the decorative sheet that had been subjected to this shaping processing had good elasticity in the width direction.
実施例１～４で得られた化粧シートの基布を、本明細書の段落０００７に記載の方法で、化粧水全放出率及び化粧水初期放出率を求めたところ、表１に示すとおりであった。
［表１］
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
化粧水全放出率（％） 化粧水初期放出率（％）
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
実施例１ ３１．２ ５９．４
実施例２ ３３．０ ５９．２
実施例３ ４５．２ ６５．６
実施例４ ４４．４ ５２．８
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
The base fabric of the decorative sheets obtained in Examples 1 to 4 was used to determine the total lotion release rate and the initial lotion release rate according to the method described in paragraph 0007 of this specification. The results are shown in Table 1.
[Table 1]
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
Total release rate of lotion (%) Initial release rate of lotion (%)
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
Example 1 31.2 59.4
Example 2 33.0 59.2
Example 3 45.2 65.6
Example 4 44.4 52.8
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
表１に示したように、実施例１～４で得られた化粧シートの基布は、含浸された化粧水が押圧により徐々に放出され、化粧シートとして好適に用いうるものであった。 As shown in Table 1, the base fabric of the decorative sheets obtained in Examples 1 to 4 gradually released the impregnated lotion when pressed, making them suitable for use as decorative sheets.
Claims (6)
前記基布は、らせん状に捲縮した偏心芯鞘型複合長繊維よりなる疎水性捲縮複合長繊維群で構成され、該疎水性捲縮複合長繊維相互間が自己融着により結合している部位を含む、嵩密度が０．０１～０．０８ｇ／ｃｍ3の長繊維不織布を外層とし、該長繊維不織布に交絡している親水性短繊維群で構成された内層とよりなる、目付２５～８０ｇ／ｍ2の積層長繊維不織布よりなり、
前記基布にその目付に対して６倍の化粧水を含浸させたとき、外層側からの化粧水全放出率は５０％未満であって、かつ、化粧水初期放出率は５０～７０％であることを特徴とする化粧シート。 In a decorative sheet in which a base fabric of the decorative sheet is impregnated with a cosmetic liquid,
The base fabric is a laminated long-fiber nonwoven fabric having a basis weight of 25 to 80 g/m2, which comprises an outer layer of a long-fiber nonwoven fabric having a bulk density of 0.01 to 0.08 g/ cm3 and which is constituted by a group of hydrophobic crimped conjugated long fibers made of eccentric core-sheath type conjugated long fibers that are helically crimped, the hydrophobic crimped conjugated long fibers including sites where the hydrophobic crimped conjugated long fibers are bonded to each other by self-fusion, and an inner layer made of a group of hydrophilic short fibers that are entangled with the long-fiber nonwoven fabric;
The decorative sheet is characterized in that when the base fabric is impregnated with a lotion in an amount six times the basis weight of the base fabric, the total release rate of the lotion from the outer layer side is less than 50% and the initial release rate of the lotion is 50 to 70%.
前記基布は、疎水性伸縮性長繊維群で構成され、該疎水性伸縮性長繊維相互間は疎水性熱融着性長繊維の融着により結合している部位を含む長繊維不織布を外層とし、該長繊維不織布に交絡している親水性短繊維群で構成された内層とよりなる、目付２５～８０ｇ／ｍ2の積層長繊維不織布よりなり、
前記基布にその目付に対して６倍の化粧水を含浸させたとき、外層側からの化粧水全放出率は５０％未満であって、かつ、化粧水初期放出率は５０～７０％であることを特徴とする化粧シート。 In a decorative sheet in which a base fabric of the decorative sheet is impregnated with a cosmetic liquid,
The base fabric is a laminated long-fiber nonwoven fabric having a basis weight of 25 to 80 g/m2, the outer layer being a long-fiber nonwoven fabric including a group of hydrophobic stretchable long fibers, the hydrophobic stretchable long fibers being bonded to each other by fusion of hydrophobic heat-fusible long fibers, and the inner layer being composed of a group of hydrophilic short fibers entangled with the long-fiber nonwoven fabric,
The decorative sheet is characterized in that when the base fabric is impregnated with a lotion in an amount six times the basis weight of the base fabric, the total release rate of the lotion from the outer layer side is less than 50% and the initial release rate of the lotion is 50 to 70%.
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Also Published As
| Publication number | Publication date |
|---|---|
| JP2020125568A (en) | 2020-08-20 |
| JP2023057092A (en) | 2023-04-20 |
| JP7469781B2 (en) | 2024-04-17 |
| JP2024075757A (en) | 2024-06-04 |
| JP7228156B2 (en) | 2023-02-24 |
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