JPH0418393B2 - - Google Patents
Info
- Publication number
- JPH0418393B2 JPH0418393B2 JP2673885A JP2673885A JPH0418393B2 JP H0418393 B2 JPH0418393 B2 JP H0418393B2 JP 2673885 A JP2673885 A JP 2673885A JP 2673885 A JP2673885 A JP 2673885A JP H0418393 B2 JPH0418393 B2 JP H0418393B2
- Authority
- JP
- Japan
- Prior art keywords
- fibers
- nonwoven fabric
- weight
- liner
- long
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 239000000835 fiber Substances 0.000 claims description 72
- 239000004745 nonwoven fabric Substances 0.000 claims description 30
- 238000004049 embossing Methods 0.000 claims description 9
- 238000004519 manufacturing process Methods 0.000 claims description 9
- 229920000297 Rayon Polymers 0.000 claims description 7
- 239000002131 composite material Substances 0.000 claims description 7
- 239000002964 rayon Substances 0.000 claims description 7
- 239000004744 fabric Substances 0.000 claims description 6
- 238000002844 melting Methods 0.000 claims description 6
- 230000008018 melting Effects 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 229920001169 thermoplastic Polymers 0.000 claims description 5
- 239000004416 thermosoftening plastic Substances 0.000 claims description 5
- 238000010438 heat treatment Methods 0.000 claims description 2
- 238000001035 drying Methods 0.000 claims 1
- 238000007789 sealing Methods 0.000 claims 1
- -1 polypropylene Polymers 0.000 description 6
- 230000003068 static effect Effects 0.000 description 6
- 239000004743 Polypropylene Substances 0.000 description 4
- 229920001155 polypropylene Polymers 0.000 description 4
- 239000004698 Polyethylene Substances 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 230000000704 physical effect Effects 0.000 description 3
- 229920000728 polyester Polymers 0.000 description 3
- 229920000573 polyethylene Polymers 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- BXKDSDJJOVIHMX-UHFFFAOYSA-N edrophonium chloride Chemical compound [Cl-].CC[N+](C)(C)C1=CC=CC(O)=C1 BXKDSDJJOVIHMX-UHFFFAOYSA-N 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000002203 pretreatment Methods 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 238000007665 sagging Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Landscapes
- Synthetic Leather, Interior Materials Or Flexible Sheet Materials (AREA)
- Shaping Of Tube Ends By Bending Or Straightening (AREA)
- Nonwoven Fabrics (AREA)
Description
（産業上の利用分野）
本発明は、コンピユーターなどに用いられる記
録媒体であるフロツピーデイスクの磁気記録用デ
イスクを収納するジヤケツトの内張りとして用い
るためのライナーに関する。
（従来の技術）
従来、この種の好ましいライナーの一つとし
て、熱可塑性繊維を含む二種以上の繊維からな
り、かつ該繊維どうしを交絡および／または接着
することによつて形態が保持された開孔不織布を
エンボス加工したものが、特開昭59−60776号公
報に開示されている。
この公知技術のライナーによれば、フロツピー
デイスクジヤケツト用のそれとして要求される
種々の特性、すなわち、デイスクの表面から脱落
する磁気鉄粉を払拭する（クリーニング性）、デ
イスク表面を損傷しない（ソフトタツチ性）、デ
イスク回転による摩擦でライナー表面の毛羽立ち
がない（耐毛羽性）、デイスクとの摩擦による静
電気発生が少なく、かつ静電気帯電性がない（低
帯電性）、デイスク回転に必要なトルク量を少な
くする（低摩擦抵抗）、デイスク回転の摩擦によ
るライナーのよじれ、たるみの発生がない（強
度）、ライナーから樹脂などの汚染物質が発生し、
デイスクを再汚染または損傷しない（耐汚染性）、
といつた特性が、充分ではないにしてもえられる
と認められる。
（発明が解決しようとする問題点）
前記公知技術においては、不織布ライナーの構
成繊維として、短繊維が用いられているが、マシ
ン方向（MD）、クロス方向（CD）の強度化のバ
ランスをとるため、さらに詳しくは、CD方向の
初期引張強度、たとえば、３％伸張時の引張強度
の絶対値をうるため、MD／CD強度化をほぼ１
に近い短繊維ウエブを用いる必要がある。かかる
繊維ウエブを形成するためには、一般にクロスラ
ツパーやエアーランダマイザーが用いられるが、
かかるウエブ形成方法は一般に生産速度が低く経
済的に不利である。また目付むらが生じ易く、そ
のむらが不織布強度に直接影響する。ちなみに、
一般のカードで形成される繊維ウエブは、繊維配
向性が大きく、不織布としてのCD強度がきわめ
て低く、前記ライナーとしては用いることができ
ない。
（問題点を解決するための手段）
本発明は、主として、CD強度が向上し、目付
むらがないといつた優れた物性を有する前記ライ
ナーを、生産性を低下させることなく安定してう
ることを目的とする。
前記目的を達成するための本発明を説明する
と、以下のとおりである。
本発明ライナーは、ポリエステル、ポリプロピ
レンなどの熱可塑性の連続フイラメントである長
繊維30〜65重量％と、短繊維35〜70重量％とから
なり、かつ該短繊維は、レーヨン繊維70〜97重量
％と、ポリプロピレン、ポリエチレン、ポリプロ
ピレン／ポリエチレン複合、低融点ポリエステル
などの融点90〜180℃の溶融繊維３〜30重量％と
からなる。そして、前記長繊維が部分的に融着す
るとともにこれと前記短繊維とが交絡することに
より目付25〜35ｇ／m2の不織布形態を維持し、該
不織布は加熱下にエンボスを賦与されている。
前記長繊維が30重量％以下であると、所要の
MD、CD強度、とくにCD強度がえられず、前記
レーヨン繊維が前記70重量％以下であると、ライ
ナーの帯電防止性、ソフトタツチ性が低下し、前
記溶融繊維が前記３重量％以下であると、エンボ
スの賦形性、表面の耐毛羽性が低下する。また目
付が前記25ｇ／m2以下であると、ライナーが薄く
なりすぎクリーニング性が低下し、前記35ｇ／m2
以上であると、デイスクの回転トルクが増大し、
経済的に不利益でもある。
前記長繊維における部分的融着形態は、一つの
大きさが３mm2以下の多数の点状である場合と、一
つの大きさが３mm2以下で幅１mm以下の多数の不連
続線状である場合とがあり、しかもそれらは前記
長繊維における面積比率が10％以下であること
が、後述する高速水流の噴射による前記長繊維に
対する前記短繊維の交絡を全体的に均一になし、
毛羽発生を抑制するうえで必要である。
前記エンボスは、ライナーの表面全体に凹凸模
様が実質的に均一に分布するように賦与されてい
る。このエンボスによる凹部においては前記溶融
繊維を介して前記長繊維と前記レーヨン繊維との
繊維間固定がなされている。このエンボス賦与に
より耐毛羽性、厚さの均一性がはかれることは、
既述の公知技術が教示するところである。
かかる本発明ライナーを製造するには、前記長
繊維、すなわち、前記熱可塑性連続紡糸フイラメ
ントをランダムに積層し熱溶融により部分的に繊
維間を接合した目付８〜25ｇ／m2のスパンボンド
不織布に、カードにより形成した目付８〜30ｇ／
m2の前記短繊維のウエブを重ね合せ、これを高速
水流で噴射処理して前記長繊維に前記短繊維を交
絡させることにより、目付25〜35ｇ／m2の複合不
織布を形成し、しかるのち、前記溶融繊維の融点
付近に加熱したエンボスロールで処理することに
よりエンボスを賦与する。
前記繊維交絡には、本出願人の特開昭57−
39268号、同59−125954号の各公報などに開示さ
れている不織布の製法ないしその装置を用いるこ
とができる。この場合の高速水流の圧力は15Kg／
cm2以上であればよく、それ以下であると、前記短
繊維を前記長繊維不織布内に打ち込むことができ
ない。水圧は高いほど有効であるが、通常、30〜
60Kg／cm2の範囲であれば充分に繊維交絡し、目的
とするライナーをうることができる。
（実施例）
多数点在する溶融部の一つが0.9mm2であつてそ
れらの合計面積が全体の面積の５％を占めるポリ
エステル100％の連続フイラメントからなる15
ｇ／m2の長繊維不織布に、1.5d×44mmのレーヨン
繊維85重量％と、1.5d×51mmのポリプロピレン／
ポリエチレン複合繊維15重量％とからなり、強度
比MD／CD＝４／１である17ｇ／m2の短繊維ウ
エブを重ね合せ、これをメツシユコンベア上で圧
力15Kg／cm2で噴射される柱状流で予備処理を施し
たのち、さらに所定間隔をおいて配置された直径
150mmの四つのロール支持体上に導いて本格処理
を施した。該各ロール支持体での噴射水圧は前記
被処理材料の移送方向における上流から下流へ順
に20Kg／cm2、30Kg／cm2、40Kg／cm2とした。
かくして、前記長繊維不織布に前記短繊維を交
絡させて形成した複合不織布を熱風乾燥機により
140℃で乾燥し、これをサンプルNo.１とし、それ
を直径0.5〜1.0mm、深さ0.3mmの凹部が多数設けら
れたスチールエンボスロールとウールンロールの
組み合せからなるエンボス加工機で該スチールロ
ールの表面が150℃、ニツプ圧30Kg／cm2（ゲージ
圧）、加工速度5m／minでエンボス処理を施し、
これをサンプルNo.２とした。一方、前記短繊維ウ
エブのみを用いて、前記繊維交絡処理と同条件で
繊維交絡処理を施して32ｇ／m2の不織布を形成
し、これを比較サンプルNo.１とし、これをさらに
前記エンボス処理と同条件でエンボス処理を施
し、これを比較サンプルNo.２とした。
なお、前記繊維交絡処理は、前記特開昭59−
125954号公報記載の方法により実施した。
前記各サンプルの物性は下表に示すとおりであ
つた。下表中の各物性は次の方法によつて測定し
た。
(1) 目 付
50cm×50cmのサンプル10枚を各々重量秤量し、
その平均値を示した。
(2) 厚 さ
厚み計により、10枚のサンプルから合計200点
を測定し、その平均値を示した。
(3) 引張強度
幅50mm、長さ150mmのサンプルをチヤツチ間隔
100mm、引張りスピード100mmで、テンシロン型抗
張力測定機にてＳ−Ｓカーブを描き、３％伸張時
の応力、破断時の応力を読み取り、各サンプル10
点の平均値を示した。
(4) 帯電性
45mm×45mmのサンプルを採取し、スタテイツ
ク・オネストメーターを用い、ターンテーブルに
サンプルを取り付けて回転させ、印加電圧
10000Vを印加し、30秒後に止めてサンプルの帯
電性が半減するまでの時間を測定し、５枚のサン
プルの平均値とした。
(5) 静摩擦係数
35mm×110mmのサンプルを静摩擦試験機を用い
て静摩擦係数を測定し、サンプル５枚の平均値と
した。
(Industrial Application Field) The present invention relates to a liner for use as a lining for a jacket that accommodates a magnetic recording disk such as a floppy disk, which is a recording medium used in computers and the like. (Prior Art) Conventionally, one of the preferable liners of this type is a liner made of two or more types of fibers including thermoplastic fibers, and whose shape is maintained by intertwining and/or adhering the fibers. An embossed perforated nonwoven fabric is disclosed in JP-A-59-60776. This known art liner has various properties required for a floppy disk jacket, namely, it wipes away magnetic iron powder that falls off from the surface of the disk (cleanability), it does not damage the disk surface ( (soft touch), no fluffing on the liner surface due to friction due to disc rotation (fuzz resistance), little generation of static electricity due to friction with the disc, and no static charge (low charging property), amount of torque required to rotate the disc (low frictional resistance), no twisting or sagging of the liner due to the friction of disk rotation (strength), no contaminants such as resin generated from the liner,
Will not re-contaminate or damage disks (stain resistant),
It is recognized that these characteristics can be obtained, although they are not sufficient. (Problems to be Solved by the Invention) In the above-mentioned known technology, short fibers are used as the constituent fibers of the nonwoven fabric liner, but it is necessary to balance strengthening in the machine direction (MD) and cross direction (CD). Therefore, in more detail, in order to obtain the initial tensile strength in the CD direction, for example, the absolute value of the tensile strength at 3% elongation, the MD/CD strength is set to approximately 1.
It is necessary to use a short fiber web close to . In order to form such a fibrous web, a cross wrapper or an air randomizer is generally used.
Such web forming methods generally have low production rates and are economically disadvantageous. In addition, unevenness in fabric weight tends to occur, and this unevenness directly affects the strength of the nonwoven fabric. By the way,
A fiber web formed from a general card has large fiber orientation and extremely low CD strength as a nonwoven fabric, so it cannot be used as the liner. (Means for Solving the Problems) The present invention mainly provides the ability to stably produce the above-mentioned liner having excellent physical properties such as improved CD strength and no unevenness in area weight without reducing productivity. With the goal. The present invention for achieving the above object will be explained as follows. The liner of the present invention consists of 30 to 65% by weight long fibers, which are thermoplastic continuous filaments such as polyester or polypropylene, and 35 to 70% by weight short fibers, and the short fibers are 70 to 97% by weight rayon fibers. and 3 to 30% by weight of molten fibers having a melting point of 90 to 180°C such as polypropylene, polyethylene, polypropylene/polyethylene composite, and low melting point polyester. The long fibers are partially fused and intertwined with the short fibers to maintain a nonwoven fabric form with a basis weight of 25 to 35 g/ m2 , and the nonwoven fabric is embossed under heating. . When the long fiber content is 30% by weight or less, the required amount of
MD, CD strength, especially CD strength cannot be obtained, and if the rayon fiber content is less than 70% by weight, the antistatic properties and soft touch properties of the liner will decrease, and if the molten fiber content is less than 3% by weight, , the embossing formability and surface fuzz resistance are reduced. In addition, if the basis weight is less than the above 25 g/m 2 , the liner becomes too thin and the cleaning performance decreases .
If it is more than that, the rotational torque of the disk increases,
It is also economically disadvantageous. The partially fused forms of the long fibers include many dots each having a size of 3 mm 2 or less, and many discontinuous lines each having a size of 3 mm 2 or less and a width of 1 mm or less. In addition, in these cases, the area ratio of the long fibers is 10% or less, so that the short fibers are uniformly entangled with the long fibers by jetting a high-speed water jet, which will be described later.
This is necessary to suppress the occurrence of fuzz. The embossing is applied so that the texture is substantially evenly distributed over the surface of the liner. In the recesses formed by the embossing, the long fibers and the rayon fibers are interfiber-fixed via the molten fibers. This embossment improves fuzz resistance and thickness uniformity.
This is what the previously mentioned known techniques teach. In order to manufacture such a liner of the present invention, the long fibers, that is, the thermoplastic continuous spun filaments are randomly laminated and the fibers are partially bonded by heat melting to form a spunbond nonwoven fabric with a basis weight of 8 to 25 g/ m2 . , fabric weight 8~30g/
A composite nonwoven fabric having a basis weight of 25 to 35 g/m 2 is formed by overlapping webs of m 2 of the short fibers and spraying them with a high-speed water jet to entangle the long fibers with the short fibers. Embossing is imparted by treatment with an embossing roll heated to around the melting point of the molten fiber. The aforementioned fiber entanglement is described in Japanese Patent Application Laid-Open No. 1983-1970 by the present applicant.
It is possible to use the nonwoven fabric manufacturing method or the apparatus disclosed in the publications such as No. 39268 and No. 59-125954. In this case, the pressure of the high-speed water flow is 15Kg/
It is sufficient if it is at least cm 2 , and if it is less than that, the short fibers cannot be driven into the long fiber nonwoven fabric. The higher the water pressure, the more effective it is, but usually 30~
If the amount is within the range of 60 kg/cm 2 , the fibers can be sufficiently entangled and the desired liner can be obtained. (Example) One of the many scattered fused parts is 0.9 mm 2 and consists of a continuous filament of 100% polyester whose total area accounts for 5% of the whole area 15
g/ m2 long fiber nonwoven fabric, 85% by weight of 1.5d x 44mm rayon fiber and 1.5d x 51mm polypropylene/
Short fiber webs of 17 g/m 2 consisting of 15% by weight of polyethylene composite fibers and a strength ratio of MD/CD = 4/1 are layered, and this is rolled into a columnar shape that is sprayed at a pressure of 15 kg/cm 2 on a mesh conveyor. After pre-treatment with the flow, the diameters are further spaced at predetermined intervals.
It was guided onto four 150 mm roll supports and subjected to full-scale processing. The jetting water pressure on each roll support was 20 Kg/cm 2 , 30 Kg/cm 2 , and 40 Kg/cm 2 from upstream to downstream in the transport direction of the material to be treated. In this way, the composite nonwoven fabric formed by intertwining the short fibers with the long fiber nonwoven fabric is dried in a hot air dryer.
This was dried at 140°C and was designated as sample No. 1. It was processed using an embossing machine consisting of a combination of a steel embossing roll and a woolen roll, which had many recesses with a diameter of 0.5 to 1.0 mm and a depth of 0.3 mm. The surface was embossed at 150℃, nip pressure 30Kg/cm 2 (gauge pressure), and processing speed 5m/min.
This was designated as sample No. 2. On the other hand, using only the short fiber web, a fiber entanglement treatment was performed under the same conditions as the fiber entanglement treatment to form a nonwoven fabric of 32 g/ m2 , which was designated as comparative sample No. 1, and this was further subjected to the embossing treatment. Emboss treatment was performed under the same conditions as above, and this was designated as comparative sample No. 2. Note that the fiber entanglement treatment is described in the above-mentioned Japanese Patent Application Laid-open No.
This was carried out by the method described in Publication No. 125954. The physical properties of each sample were as shown in the table below. Each physical property in the table below was measured by the following method. (1) Weigh 10 samples of 50cm x 50cm each,
The average value is shown. (2) Thickness A total of 200 points were measured from 10 samples using a thickness meter, and the average value is shown. (3) Tensile strength Samples with a width of 50 mm and a length of 150 mm are sampled at intervals of
100mm and tensile speed of 100mm, draw an S-S curve with a Tensilon type tensile strength measuring machine, read the stress at 3% extension and the stress at break, and measure 10 for each sample.
The average value of the points is shown. (4) Chargeability Collect a 45mm x 45mm sample, use a static honest meter, attach the sample to a turntable, rotate it, and check the applied voltage.
A voltage of 10,000 V was applied, and the voltage was stopped after 30 seconds to measure the time until the chargeability of the sample was reduced by half, and the value was taken as the average value of the five samples. (5) Static friction coefficient The static friction coefficient of a 35 mm x 110 mm sample was measured using a static friction tester, and the average value of the five samples was taken.
【表】【table】
【表】
（発明の効果）
本発明によれば、目的とするライナーが以上の
ような構成であり、かつ製法によりえられるもの
であるから、既述の公知技術の欠点を改良するこ
とができるとともに、とくに次の効果を有する。
(1) 部分的に融着した長繊維不織布はCD強度に
優れるが、これを用いることにより生産性に優
れた短繊維パラレルウエブを用いることができ
る。したがつて、CD強度に優れる不織布ライ
ナーをその生産速度を低下させることなく安定
的にうることができる。この不織布ライナーは
MD強度はもちろんのこと、CD強度において
ランダムウエブやクロスウエブからえられたそ
れに優るとも劣ることはない。
(2) 短繊維ウエブの目付むらによつて生ずる強度
むらを長繊維不織布を用いることによりなくし
て均一な不織布ライナーをうることができる。
ちなみに、これは長繊維不織布と併用する繊維
がパラレル、ランダム、クロスなどのいずれの
ウエブにも同様に適用することができるもので
ある。
(3) 製造工程において生ずる引張りによる短繊維
ウエブのMDへの繊維配向をこれに長繊維不織
布を併用することにより防止することができ
る。すなわち、該配向によるCD強度の低下を
防止することができる。[Table] (Effects of the Invention) According to the present invention, the target liner has the above-mentioned structure and is obtained by the manufacturing method, so that the drawbacks of the known techniques described above can be improved. In particular, it has the following effects. (1) Partially fused long fiber nonwoven fabric has excellent CD strength, and by using this, short fiber parallel webs with excellent productivity can be used. Therefore, a nonwoven fabric liner with excellent CD strength can be stably obtained without reducing its production rate. This non-woven liner
Not only MD strength but also CD strength is superior to that obtained from random web or cross web. (2) By using a long fiber nonwoven fabric, it is possible to obtain a uniform nonwoven fabric liner by eliminating the unevenness in strength caused by the unevenness in the fabric weight of the short fiber web.
Incidentally, this can be similarly applied to any type of web in which the fibers used in combination with the long-fiber nonwoven fabric are parallel, random, cross, etc. (3) Fiber orientation of the short fiber web in the MD due to tension that occurs during the manufacturing process can be prevented by using the long fiber nonwoven fabric together with this. That is, it is possible to prevent a decrease in CD strength due to the orientation.
Claims (1)
65重量％と、短繊維35〜70重量％とからなり、か
つ該短繊維はレーヨン繊維70〜97重量％と、融点
90〜180℃の溶融繊維３〜30重量％とからなり、
少なくとも前記長繊維は部分的に融着するととも
にこれと前記短繊維とは交絡することにより目付
25〜35ｇ／m2の不織布形態を維持し、該不織布は
エンボスを賦与されていることを特徴とするフロ
ツピーデイスクジヤケツト用ライナー。 ２ 熱可塑性連続フイラメントである長繊維を部
分的に熱融着してなる目付８〜25ｇ／m2の不織布
に、レーヨン繊維70〜97重量％と融点90〜180℃
の溶融繊維３〜30重量％とからなる目付８〜30
ｇ／m2の短繊維ウエブを重ね合せた上から高速水
流を少なくとも15Kg／cm2の圧力で噴射して前記長
繊維に前記短繊維を交絡させることにより目付25
〜35ｇ／m2の複合不織布を形成し、該複合不織布
を脱水乾燥したのちこれに加熱下にエンボスを賦
与することを特徴とするフロツピーデイスクジヤ
ケツト用ライナーの製法。 ３ 前記長繊維不織布の前記融着形態は、一つの
大きさが３mm2以下である多数の点状であつて、こ
れらの前記長繊維不織布における面積比率が10％
以下である特許請求の範囲第２項記載のフロツピ
ーデイスクジヤケツト用ライナーの製法。 ４ 前記長繊維不織布の前記融着形態は、一つの
大きさが３mm2以下で幅１mm以下の多数の不連続線
状であつて、これらの前記長繊維不織布における
面積比率が10％以下である特許請求の範囲第２項
記載のフロツピーデイスクジヤケツト用ライナー
の製法。[Claims] 1 Long fibers that are thermoplastic continuous filaments 30~
65% by weight of rayon fibers and 35-70% by weight of short fibers, and the short fibers have a melting point of 70-97% by weight of rayon fibers.
Consists of 3-30% by weight of molten fibers at 90-180℃,
At least the long fibers are partially fused and intertwined with the short fibers, so that the fabric weight
A liner for a floppy disk jacket, which maintains the form of a nonwoven fabric of 25 to 35 g/m 2 and is characterized in that the nonwoven fabric is embossed. 2 A nonwoven fabric with a basis weight of 8 to 25 g/m 2 made by partially heat-sealing long fibers, which are continuous thermoplastic filaments, is mixed with 70 to 97% by weight of rayon fiber and a melting point of 90 to 180°C.
Fabric weight 8-30 consisting of 3-30% by weight of fused fibers
g/m 2 short fiber webs are superimposed and a high-speed water stream is sprayed at a pressure of at least 15 kg/cm 2 to intertwine the short fibers with the long fibers to obtain a fabric weight of 25.
A method for producing a liner for a floppy disk jacket, which comprises forming a composite nonwoven fabric of ~35 g/m 2 , dehydrating and drying the composite nonwoven fabric, and then applying embossing to the composite nonwoven fabric while heating. 3. The fused form of the long fiber nonwoven fabric is a large number of dots each having a size of 3 mm 2 or less, and the area ratio of these in the long fiber nonwoven fabric is 10%.
A method for producing a liner for a floppy disk jacket as set forth in claim 2 below. 4. The fused form of the long fiber nonwoven fabric is a large number of discontinuous lines each having a size of 3 mm 2 or less and a width of 1 mm or less, and the area ratio of these in the long fiber nonwoven fabric is 10% or less. A method for manufacturing a liner for a floppy disk jacket according to claim 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2673885A JPS61187180A (en) | 1985-02-14 | 1985-02-14 | Liner for floppy disc jacket and its manufacture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2673885A JPS61187180A (en) | 1985-02-14 | 1985-02-14 | Liner for floppy disc jacket and its manufacture |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61187180A JPS61187180A (en) | 1986-08-20 |
| JPH0418393B2 true JPH0418393B2 (en) | 1992-03-27 |
Family
ID=12201642
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2673885A Granted JPS61187180A (en) | 1985-02-14 | 1985-02-14 | Liner for floppy disc jacket and its manufacture |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61187180A (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63184977A (en) * | 1987-01-28 | 1988-07-30 | Hitachi Maxell Ltd | Disk cartridge |
| JPH0197257A (en) * | 1987-10-07 | 1989-04-14 | Shinwa Kk | Production of nonwoven fabric |
| US4775579A (en) * | 1987-11-05 | 1988-10-04 | James River Corporation Of Virginia | Hydroentangled elastic and nonelastic filaments |
| US4998176A (en) * | 1989-03-08 | 1991-03-05 | Mitsubishi Rayon Co., Ltd. | Liner for floppy disk and process for producing the same |
| US5060105B1 (en) * | 1990-04-16 | 1996-12-03 | Int Paper Co | Hybrid nonwoven diskette liner |
| JPH04153351A (en) * | 1990-10-12 | 1992-05-26 | Unitika Ltd | Laminated nonwoven fabric and preparation thereof |
| JP5054887B2 (en) * | 2004-10-22 | 2012-10-24 | 株式会社神戸製鋼所 | Drilling roll, multi-fine hole metal material manufacturing apparatus, multi-fine hole metal material manufacturing method, multi-fine hole metal material |
| US20060128247A1 (en) * | 2004-12-14 | 2006-06-15 | Kimberly-Clark Worldwide, Inc. | Embossed nonwoven fabric |
| CN108342063B (en) * | 2017-08-11 | 2021-07-20 | 上海彩滨实业发展有限公司 | Color velvet board and preparation method thereof |
-
1985
- 1985-02-14 JP JP2673885A patent/JPS61187180A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61187180A (en) | 1986-08-20 |
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