JPH02221450A - Production of high stretchable nonwoven fabric - Google Patents
Production of high stretchable nonwoven fabricInfo
- Publication number
- JPH02221450A JPH02221450A JP1041381A JP4138189A JPH02221450A JP H02221450 A JPH02221450 A JP H02221450A JP 1041381 A JP1041381 A JP 1041381A JP 4138189 A JP4138189 A JP 4138189A JP H02221450 A JPH02221450 A JP H02221450A
- Authority
- JP
- Japan
- Prior art keywords
- fiber
- web
- fibers
- nonwoven fabric
- temperature
- 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.)
- Granted
Links
- 239000004745 nonwoven fabric Substances 0.000 title claims abstract description 44
- 238000004519 manufacturing process Methods 0.000 title claims description 7
- 239000000835 fiber Substances 0.000 claims abstract description 97
- 229920000642 polymer Polymers 0.000 claims abstract description 26
- 238000004049 embossing Methods 0.000 claims abstract description 17
- 239000002131 composite material Substances 0.000 claims description 39
- 238000000034 method Methods 0.000 claims description 17
- 238000002788 crimping Methods 0.000 claims description 2
- 239000003814 drug Substances 0.000 abstract description 11
- 229940079593 drug Drugs 0.000 abstract description 9
- 239000000463 material Substances 0.000 abstract description 7
- 238000002844 melting Methods 0.000 abstract description 5
- 230000008018 melting Effects 0.000 abstract description 4
- -1 polyethylene Polymers 0.000 description 15
- 239000004744 fabric Substances 0.000 description 9
- 239000011230 binding agent Substances 0.000 description 8
- 229920000139 polyethylene terephthalate Polymers 0.000 description 8
- 239000005020 polyethylene terephthalate Substances 0.000 description 8
- 229920000728 polyester Polymers 0.000 description 7
- 239000004677 Nylon Substances 0.000 description 5
- 229920001778 nylon Polymers 0.000 description 5
- 238000011084 recovery Methods 0.000 description 5
- 238000009987 spinning Methods 0.000 description 5
- 239000004698 Polyethylene Substances 0.000 description 4
- 239000004743 Polypropylene Substances 0.000 description 4
- 229920001577 copolymer Polymers 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- 230000035699 permeability Effects 0.000 description 4
- 229920000573 polyethylene Polymers 0.000 description 4
- 229920001155 polypropylene Polymers 0.000 description 4
- 239000011347 resin Substances 0.000 description 4
- 229920005989 resin Polymers 0.000 description 4
- 239000004952 Polyamide Substances 0.000 description 3
- 229920001971 elastomer Polymers 0.000 description 3
- 239000000806 elastomer Substances 0.000 description 3
- 229920002647 polyamide Polymers 0.000 description 3
- 229920000098 polyolefin Polymers 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- SGTNSNPWRIOYBX-UHFFFAOYSA-N 2-(3,4-dimethoxyphenyl)-5-{[2-(3,4-dimethoxyphenyl)ethyl](methyl)amino}-2-(propan-2-yl)pentanenitrile Chemical compound C1=C(OC)C(OC)=CC=C1CCN(C)CCCC(C#N)(C(C)C)C1=CC=C(OC)C(OC)=C1 SGTNSNPWRIOYBX-UHFFFAOYSA-N 0.000 description 2
- YZTJKOLMWJNVFH-UHFFFAOYSA-N 2-sulfobenzene-1,3-dicarboxylic acid Chemical compound OC(=O)C1=CC=CC(C(O)=O)=C1S(O)(=O)=O YZTJKOLMWJNVFH-UHFFFAOYSA-N 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000004927 fusion Effects 0.000 description 2
- QQVIHTHCMHWDBS-UHFFFAOYSA-N isophthalic acid Chemical compound OC(=O)C1=CC=CC(C(O)=O)=C1 QQVIHTHCMHWDBS-UHFFFAOYSA-N 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229920001707 polybutylene terephthalate Polymers 0.000 description 2
- 229920002635 polyurethane Polymers 0.000 description 2
- 239000004814 polyurethane Substances 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 230000000699 topical effect Effects 0.000 description 2
- LLLVZDVNHNWSDS-UHFFFAOYSA-N 4-methylidene-3,5-dioxabicyclo[5.2.2]undeca-1(9),7,10-triene-2,6-dione Chemical compound C1(C2=CC=C(C(=O)OC(=C)O1)C=C2)=O LLLVZDVNHNWSDS-UHFFFAOYSA-N 0.000 description 1
- 241000700143 Castor fiber Species 0.000 description 1
- 229920000089 Cyclic olefin copolymer Polymers 0.000 description 1
- 239000005977 Ethylene Substances 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 239000013013 elastic material Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000001747 exhibiting effect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000007500 overflow downdraw method Methods 0.000 description 1
- WXZMFSXDPGVJKK-UHFFFAOYSA-N pentaerythritol Chemical compound OCC(CO)(CO)CO WXZMFSXDPGVJKK-UHFFFAOYSA-N 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 229920001748 polybutylene Polymers 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Landscapes
- Nonwoven Fabrics (AREA)
Abstract
Description
本発明は、外用薬基布などの衛生材料に好適な高伸縮性
を有する不織布に関するもので、さらに詳しくは、高捲
縮性を有する複合繊維ウェブが非連続模様状に少なくと
も一部が熱固着されてなる高伸縮性不織布の製造方法に
関するものである。The present invention relates to a highly stretchable nonwoven fabric suitable for sanitary materials such as topical drug base fabrics, and more specifically, a composite fiber web with high crimpability is formed into a discontinuous pattern at least in part by heat fixation. The present invention relates to a method for producing a highly stretchable nonwoven fabric.
従来、不織布の製造方法としては湿式法あるいは乾式法
で作った繊維ウェブまたは紡糸した長繊維を直接繊維ウ
ェブとした後、繊維ウェブをニードルパンチ法や高速流
体流処理法等により繊維を絡合させる方法、樹脂バイン
ダーにより繊維を固定する方法やバインダー繊維を混繊
した繊維ウェブあるいは不織布を熱処理してバインダー
繊維による熱融着で繊維を接合する方法などが広く行わ
れている。さらに、伸縮性の改善のため高捲縮性繊維を
用いる方法が提案されている。
また、熱融着法による不織布に関しては、特開昭５８−
１６９５６０号公報、特開昭５９−１５７３６６号公報
にはバインダー繊維を混繊した繊維ウェブを用い、加熱
エンポスローラーにより部分的に熱融着した不織布が、
特開昭５７−１６７４４２号公報、特開昭５８−１３７
６１号公報にはバインダー繊維を混繊した繊維ウェブを
用い、繊維ウェブ全体を熱融着した後、更に加熱エンポ
スローラーにより部分的に熱融着した不織布が提案され
ている。
更に、高捲縮性を有する複合繊維ウェブを使用した不織
布に関しては、実開昭６２−９７１３４号公報には水流
絡合法とニードルパンチ法による繊維絡合不織布をパッ
プ剤基布用不織布とすることが、特開昭６３−２８９６
０号公報には繊維ウェブを水流絡合法により繊維絡合不
織布とした外用薬基布や衛生材料用不織布が、まｔ；、
特開昭６２−２１８５５号公報および特開昭６２−１７
７２６９号公報には高捲縮性を有する複合繊維にバイン
ダー繊維を混繊し、熱融着により中綿用不織布とする方
法が提案されている。Conventionally, nonwoven fabrics have been produced by directly forming a fibrous web from a fibrous web made by a wet method or a dry method, or from spun long fibers, and then entangling the fibers with the fibrous web using a needle punch method, a high-speed fluid flow treatment method, etc. Widely used methods include fixing fibers with a resin binder, heat-treating a fiber web or nonwoven fabric mixed with binder fibers, and joining the fibers by thermal fusion using the binder fibers. Furthermore, a method using highly crimpable fibers has been proposed to improve stretchability. Regarding non-woven fabrics produced by heat fusion method, Japanese Patent Application Laid-open No. 58-
No. 169560 and Japanese Patent Application Laid-open No. 59-157366 use a fiber web mixed with binder fibers, and a nonwoven fabric is partially heat-sealed using a heated embossing roller.
JP-A-57-167442, JP-A-58-137
No. 61 proposes a nonwoven fabric in which a fibrous web mixed with binder fibers is heat-sealed in its entirety and then partially heat-sealed using a heated embossing roller. Furthermore, regarding nonwoven fabrics using composite fiber webs having high crimpability, Japanese Utility Model Application Publication No. 62-97134 discloses that fiber entangled nonwoven fabrics produced by hydroentanglement method and needle punching method are used as nonwoven fabrics for poultice base fabrics. However, JP-A-63-2896
Publication No. 0 discloses a nonwoven fabric for external medicines and sanitary materials made from fiber webs using a hydroentanglement method.
JP-A-62-21855 and JP-A-62-17
Japanese Patent No. 7269 proposes a method in which binder fibers are mixed with composite fibers having high crimpability, and the mixture is thermally fused to form a nonwoven fabric for filling.
【発明が解決しようとする課題】
外用薬用基布においては関節部などの動きに対応した伸
縮性と肌添え性を得るため、基布には柔軟性と、高伸縮
性および伸長回復性が要求される。
しかし、従来の樹脂バインダーによる接着不織布では高
伸縮性で、柔軟性の高い不織布は得られにくい。また、
部分熱融着不織布は、樹脂バインダー接着不織布や全面
熱融着不織布よりは繊維の自由度が大きいため、柔軟性
のある不織布は得られ易いが、伸縮性の十分な不織布で
はない。
更に、潜在捲縮能を有する繊維を用いて作った繊維ウェ
ブをニードルパンチ法や水流絡合法で絡合して得られた
不織布は、絡合されることにより繊維の自由度が低下し
、後からの捲縮発現性が悪くなる。そして、繊維の捲縮
を発現させるために、熱処理条件を強くすると不織布の
風合がかたくなりやすい。また、繊維同志が固定されて
いないために伸縮性が得られないとか、高伸長に対して
は構造破壊を生ずるなどの欠点を有していた。
また、従来の方法においては繊維の絡合処理や樹脂バイ
ンダーによる接着、捲縮発現のための熱処理など多くの
工程をへて製造されるため、製造コストの高いものであ
った。
しかし、従来の不織布の製造において、軟化温度の異な
る少なくとも２種類の重合体からなり、高捲縮性を有す
る複合繊維を繊維ウェブとして用い、繊維間の熱融着に
よる固定と同時に、繊維の捲縮を発現させて、高伸縮性
の不織布を得る方法は提案されていない。
本発明者は、高伸縮性の不織布を簡単に製造する方法を
開発すべく鋭意研究を重ねた結果、簡単な工程により高
伸縮性の不織布を製造出来ることを見いだした。すなわ
ち、本発明は前記の潜在捲縮能を有する繊維ウェブを用
いて、安価に高伸縮性不織布を製造する方法を提供する
にある。[Problems to be Solved by the Invention] In order to obtain elasticity and skin comfort that correspond to the movements of joints, etc., in the base fabric for external use, the base fabric is required to have flexibility, high elasticity, and stretch recovery. be done. However, with conventional adhesive nonwoven fabrics using resin binders, it is difficult to obtain highly elastic and flexible nonwoven fabrics. Also,
Partially heat-sealed nonwoven fabrics have a greater degree of freedom in fibers than resin binder-bonded nonwoven fabrics or fully heat-sealed nonwoven fabrics, so it is easier to obtain flexible nonwoven fabrics, but they do not have sufficient stretchability. Furthermore, in nonwoven fabrics obtained by entangling fiber webs made using fibers with latent crimp ability using the needle punch method or hydroentanglement method, the degree of freedom of the fibers decreases due to entanglement, and The appearance of crimp becomes worse. If the heat treatment conditions are strengthened in order to develop fiber crimp, the texture of the nonwoven fabric tends to become hard. In addition, it has disadvantages such as not being able to obtain stretchability because the fibers are not fixed together, and structural failure due to high elongation. Furthermore, in the conventional method, manufacturing costs were high because the fibers were manufactured through many steps such as fiber entanglement treatment, adhesion with a resin binder, and heat treatment to develop crimp. However, in the production of conventional nonwoven fabrics, composite fibers made of at least two types of polymers with different softening temperatures and having high crimpability are used as the fiber web, and at the same time, the fibers are fixed by heat fusion and the fibers are rolled. No method has been proposed for obtaining a highly stretchable nonwoven fabric by causing shrinkage. The inventor of the present invention conducted intensive research to develop a method for easily producing a highly elastic nonwoven fabric, and as a result, discovered that a highly elastic nonwoven fabric could be produced through a simple process. That is, the present invention provides a method for manufacturing a highly stretchable nonwoven fabric at low cost using the aforementioned fibrous web having latent crimp ability.
本発明は、軟化温度の異なる少なくとも２種類の重合体
からなり潜在捲縮能を有する複合繊維よりなるウェブを
、該複合繊維を構成する高温軟化重合体成分は軟化せず
低温軟化重合体成分が軟化する温度であって、かつ該複
合繊維の捲縮発現温度以上に加熱した非連続模様を有す
るエンポスローラーとフラットローラーとの間で押圧し
、引き統き該エンポスローラー又はフラットローラー表
面に少なくともｌ／５周の長さを接触させることにより
、該繊維ウェブを非連続模様状に少なくとも一部を熱固
着するとともに３０〜７０％面積収縮させて該複合繊維
の捲縮を発現させることを特徴とする高伸縮性不織布の
製造方法である。
本発明における潜在捲縮能を有する複合繊維としては、
軟化温度の異なる少なくとも２種類の重合体からなる複
合繊維であって、後の熱処理により２−５ｃｍ当たり３
０個以上、好ましくは５０個以上の捲縮を発現する熱可
塑性重合体の複合繊維であれば繊維形態は特に限定され
ない。例えば、同一種類の重合体であって極限粘度、分
子鎖構造等の異なる重合体の組み合わせ、異なる重合体
の組み合わせにより、重合体をサイドバイサイド型構造
、偏心芯鞘構造などの異方性構造に複合紡糸して得られ
る複合繊維である。捲縮発現性のうえではサイドバイサ
イド型構造の方がより高捲縮を得られ易い。複合繊維の
繊維断面形状は円形断面、異形断面または中空断面のい
ずれであっても差し支えないが、好ましくは軟化温度の
低い繊維成分が繊維表面の一部を構成した繊維である。
複合繊誰を構成する重合体としては、例えば、ポリエチ
レン、ポリプロピレン、ポリブチレン、エチレンプロピ
レン共重合体などのポリオレフィンあるいはオレフィン
共重合体、ポリエチレンテレフタレート、８０モル％以
上のエチレンテレフタレート共重合体、ポリブチレンテ
レフタレート、スルホイソフタル酸またはその金属塩と
エチレンテレフタレートとの共重合体、ペンタエリスリ
トール共重合変成ポリエチレンテレフタレートなどのポ
リエステルあるいはポリエステル共重合体、６−ナイロ
ン、６ローナイロン、６１０−ナイロン、１２−ナイロ
ンなどのポリアミド、ポリウレタン、ポリエステルエラ
ストマー ポリアミドエラストマー などの群から選ば
れた少なくとも２種類の重合体であって、かつ少なくと
も１種類の重合体は他の重合体の軟化温度より少なくと
も２０℃低い軟化温度の重合体である。重合体の組み合
わせとしては、例えば、ポリエチレン−ポリプロピレン
、ポリエチレンテレ７タレートーエチレンテレ７タレー
ト共重合体、ポリエチレンあるいはポリプロピレン−ポ
リエチレンテレフタレート、変成ポリエステル−ポリエ
チレンテレフタレート、６ローナイロンー１２−ナイロ
ン、ポリオレフィン−ポリアミド、ポリオリフイン−ポ
リウレタン、ポリエステルエラストマー−ポリエステル
などがある。具体的な幾つかを例示すると、ポリオレフ
ィン系複合繊維としては、例えば、１２０℃の熱鬼理に
より２．５ｃｍ当たり５０側以上の捲縮を発現スるポリ
エチレンとポリプロピレン芯鞘型繊維断面構造の複合繊
維。ポリエステル系複合繊維としては、スルホイソフタ
ル酸またはその金属塩を共重合した変成ポリエチレンテ
レフタレートとポリエチレンテレフタレートとのサイド
バイサイド型繊維断面構造または偏心型芯鞘断面構造に
複合紡糸して得た複合繊維。ポリエチレンテレフタレー
トとポリブチレンテレフタレートとの複合繊維などであ
る。
複合繊維の製造における紡糸条件は、選ばれた重合体の
熱的特性から決められるが、一般には、紡糸温度が２０
０〜３１０℃、巻取速度が７００〜３０００ ｍ／ｍｉ
ｎで複合紡糸し、得られた複合繊維は７０〜９８℃の温
水中、温熱雰囲気中あるいは乾熱中のいずれかの条件下
で２〜８倍に延伸して複合繊維の単繊維繊度ｌ〜８デニ
ールとし、さらに必要があれば熱固定あるいは仮固定し
たのち、機械捲縮を付与し、必要に応じて繊維油剤を付
与した後、約３０〜１００ｍ＋ａに切断して短繊維とす
る。この繊維は最終的には機械捲縮と発現した捲縮との
総捲検数が２．５ｃ＋ａ当たり３０個以上あるいは５０
個以上の高捲縮を発現する複合繊維が得られる。次いで
、複合繊維はカードに掛けて解繊し、ウニバーで平均目
付３０” １５０ ｇ／ｒｓ”のランダムウェブ、クロ
スラップウェブ、パラレルウェブなどの繊維ウェブとす
る。繊維ウェブの目付けが小さいと不織布強度および伸
縮性に劣るものとなる。得られた繊維ウェブは複合繊維
を構成する高温軟化重合体成分は軟化せず低温軟化重合
体成分が軟化する温度であって、かつ複合繊維の捲縮発
現温度以上に加熱した非連続模様を有するエンポスロー
ラーと７ラツトローラーとの間で押圧し、非遮統模様状
に少なくとも一部が熱固着゛された表面状態とした後、
引き統き該エンポスローラー又はフラットローラー表面
に少なくともｌ／５周の長さあるいは１０秒間以上接触
させることにより、繊維ウェブの面積を３０〜７０％面
積収縮させる。それによって繊維ウェブの繊維同士が部
分的に熱固着するとともに複合繊維に捲縮が発現する。
得られた不織布は、隣接する熱融着部間の距離が０．５
〜１０ｍｍの範囲にあり、不織布の切断伸度は１００％
以上、５０％モジュラスは０．５〜ｌ ｋｇ１５ｃｍ１
５０％伸長時の回復率は６０％以上嵩密度は０．１〜０
．３ｇ／ｃｍ”の範囲であることが好ましい。
外用薬基布として用いる場合、５０％モジュラスと伸長
回復率は重要であり、経方向のモジュラスが低いと塗置
時の操作性が悪く、両方向のモジュラスが高かったり伸
長回復率が低いと関節部に貼付したときに屈伸時の違和
感が大きいものとなる。また、嵩密度が小さいと塗布し
た外用薬が裏面に浸出して好ましくない。
また、エンポスローラーの彫刻の深さは０．５ｍ■以上
であることが必要で、深さが浅いと熱固着部が非連続模
様状にならず、風合がかたく伸縮性に劣ったものとなる
。熱固着点間の距離は少なくともｌ ｍｍ以上必要であ
り、短くなると風合がかたく伸縮性に劣るものとなる。
一方、熱固着点間距離が長くなると柔軟性に富むが、伸
縮性が低下するため、好ましくは１０ｌ／０１以下の範
囲である。そして短繊維の熱固着箇所は少なくとも平均
２箇所となっていることが必要であり、好ましくは３箇
所以上である。
エンポスローラーとフラットローラーの温度は熱固着と
捲縮発現に大きく影響する。ここに熱固着とは交差する
複合繊維の低温軟化重合体成分が熱加圧下に軟化、半溶
融、又は溶融することにより変形し繊維相互間の動きが
固定された状態のことである。温度が低く繊維の熱固着
が不十分であると伸長により不織布の構造破壊が生じ易
くなり、伸長回復性に劣るものとなる。また、温度が高
く固着部が完全にフィルム化したり、固着部肩囲の繊維
までもが熱融着するほどに熱固着が強すぎると繊維間の
拘束が大きくなり、伸度が小さく、十分な伸縮性が得ら
れないばかりか風合がかたくなる。各ローラーの温度は
一方が低温軟化重合体成分の溶融温度以上であっても差
し支えないが、この場合にはエンボス後の繊維ウェブは
溶融温度未満の他方のローラーに接触させ捲縮発現させ
る。
また、繊維ウェブを加工するエンポスローラーとフラッ
トローラーの代わりにいずれか一方あるいは両方をエン
ドレスベルト状になった処理装置を使用することもでき
る。
本発明で得た高伸縮性不織布は少なくとも一面が緻密化
されていて、伸縮性に富み、柔軟で肌添え性がよく、透
気性、透湿性に優れた外用薬基布などの衛生材料として
好適である。The present invention provides a web made of composite fibers that are made of at least two types of polymers having different softening temperatures and have latent crimp ability, in which the high temperature softening polymer component that makes up the composite fibers does not soften and the low temperature softening polymer component does not soften. It is pressed between a flat roller and an embossing roller having a discontinuous pattern that is heated to a temperature at which the composite fiber softens and is higher than the crimping temperature of the composite fiber, and the embossing roller or flat roller is pulled to a surface of the embossing roller or flat roller at least 1 liter. /5 By bringing the length of the circumference into contact, at least a portion of the fiber web is heat-fixed in a discontinuous pattern, and the area is contracted by 30 to 70%, thereby causing crimp of the composite fibers. This is a method for producing highly elastic nonwoven fabric. The composite fibers having latent crimp ability in the present invention include:
Composite fibers made of at least two types of polymers with different softening temperatures, and after a subsequent heat treatment,
The fiber form is not particularly limited as long as it is a thermoplastic polymer composite fiber that exhibits 0 or more crimps, preferably 50 or more crimps. For example, by combining polymers of the same type but with different intrinsic viscosities, molecular chain structures, etc., or by combining different polymers, the polymers can be composited into anisotropic structures such as side-by-side structures and eccentric core-sheath structures. It is a composite fiber obtained by spinning. In terms of crimp development, the side-by-side type structure is easier to obtain high crimp. The conjugate fiber may have a circular cross-section, a modified cross-section, or a hollow cross-section, but it is preferably a fiber in which a fiber component with a low softening temperature forms part of the fiber surface. Examples of the polymer constituting the composite fiber include polyolefins or olefin copolymers such as polyethylene, polypropylene, polybutylene, and ethylene propylene copolymers, polyethylene terephthalate, 80 mol% or more ethylene terephthalate copolymers, and polybutylene terephthalate. , copolymers of sulfoisophthalic acid or its metal salts and ethylene terephthalate, polyesters or polyester copolymers such as pentaerythritol copolymerized modified polyethylene terephthalate, 6-nylon, 6-row nylon, 610-nylon, 12-nylon, etc. At least two types of polymers selected from the group such as polyamide, polyurethane, polyester elastomer, polyamide elastomer, etc., and at least one type of polymer has a softening temperature at least 20°C lower than the softening temperature of the other polymers. It is. Examples of polymer combinations include polyethylene-polypropylene, polyethylene tere-7-thalerate-ethylene tere-7-thaleate copolymer, polyethylene or polypropylene-polyethylene terephthalate, modified polyester-polyethylene terephthalate, 6-row nylon-12-nylon, polyolefin-polyamide, and polyolefin. - Polyurethane, polyester elastomer - Polyester, etc. To give some specific examples, examples of the polyolefin composite fiber include a composite of polyethylene and polypropylene core-sheath type fiber cross-sectional structure that develops 50 or more crimps per 2.5 cm when heated at 120°C. fiber. The polyester composite fiber is a composite fiber obtained by composite spinning into a side-by-side fiber cross-sectional structure or an eccentric core-sheath cross-sectional structure of modified polyethylene terephthalate copolymerized with sulfoisophthalic acid or its metal salt and polyethylene terephthalate. These include composite fibers of polyethylene terephthalate and polybutylene terephthalate. The spinning conditions for producing composite fibers are determined by the thermal properties of the selected polymer, but generally the spinning temperature is 20°C.
0~310℃, winding speed 700~3000 m/mi
Composite spinning is carried out at n, and the obtained composite fiber is stretched 2 to 8 times in hot water at 70 to 98°C, in a heated atmosphere, or in dry heat to obtain a single fiber fineness of composite fiber of l to 8. The fibers are made into a denier, heat-set or temporarily fixed if necessary, mechanically crimped, applied with a fiber oil if necessary, and then cut into lengths of about 30 to 100 m+a to obtain short fibers. This fiber finally has a total number of crimps of 30 or more per 2.5c+a or 50 crimps per 2.5c+a.
Composite fibers exhibiting high crimps can be obtained. Next, the composite fibers are carded and defibrated to form fibrous webs such as random webs, cross-wrap webs, parallel webs, etc., with an average basis weight of 30" 150 g/rs" using Univer. If the basis weight of the fibrous web is low, the nonwoven fabric will have poor strength and elasticity. The resulting fibrous web has a discontinuous pattern that is heated to a temperature at which the high temperature softening polymer component constituting the composite fibers does not soften and the low temperature softening polymer component softens, and is heated to a temperature higher than the crimp onset temperature of the composite fibers. After pressing between an embossing roller and a 7-ratto roller to obtain a surface state in which at least a portion of the material is heat-fixed in an uninterrupted pattern,
By bringing the fiber web into contact with the surface of the embossing roller or flat roller for at least 1/5 circumference or for 10 seconds or more, the area of the fiber web is contracted by 30 to 70%. As a result, the fibers of the fibrous web are partially thermally bonded to each other, and the composite fibers are crimped. In the obtained nonwoven fabric, the distance between adjacent heat-sealed parts is 0.5
It is in the range of ~10mm, and the cutting elongation of the nonwoven fabric is 100%.
Above, 50% modulus is 0.5~l kg15cm1
Recovery rate at 50% elongation is over 60% Bulk density is 0.1 to 0
．． 3 g/cm" range. When used as a base fabric for external medicine, 50% modulus and elongation recovery rate are important. If the modulus in the warp direction is low, the operability during application will be poor, and the If the modulus is high or the extension recovery rate is low, when it is applied to a joint, it will cause a great discomfort during bending and stretching.In addition, if the bulk density is low, the applied topical medicine will leak out to the back surface, which is undesirable. The depth of the roller engraving must be 0.5 m or more; if the depth is shallow, the heat-fixed area will not form a discontinuous pattern, resulting in a hard texture and poor elasticity. The distance between the heat-fixed points must be at least 1 mm; if it is short, the texture will be stiff and the elasticity will be poor. On the other hand, if the distance between the heat-fixed points is long, it will be more flexible but the elasticity will decrease. , preferably in the range of 10 l/01 or less.And it is necessary that the short fibers are thermally fixed at at least two places on average, and preferably at least three places.The temperature of the embossing roller and flat roller is Heat fixation and crimp development are greatly affected.Heat fixation is the deformation caused by the low-temperature softening polymer components of the intersecting composite fibers softening, semi-melting, or melting under heat and pressure, and the movement between the fibers is prevented. It refers to a fixed state.If the temperature is low and the thermal fixation of the fibers is insufficient, the structure of the nonwoven fabric will easily break due to elongation, resulting in poor elongation recovery.Also, if the temperature is high and the fixed part is If the heat fixation is so strong that it completely forms a film or even the fibers around the shoulder area of the bonded area are heat-fused, the restriction between the fibers will become large, the elongation will be low, and sufficient elasticity will not be obtained. The texture becomes hard.The temperature of each roller may be higher than the melting temperature of the low-temperature softening polymer component, but in this case, the fibrous web after embossing should not be brought into contact with the other roller whose temperature is lower than the melting temperature. Crimp is developed.Furthermore, instead of embossing rollers and flat rollers for processing the fiber web, it is also possible to use a processing device in which one or both of them are in the form of an endless belt.Highly elastic nonwoven fabric obtained by the present invention At least one side of the material is densified, it is highly stretchable, flexible, and has good skin contact, and is suitable as a sanitary material such as a base fabric for external medicines, which has excellent air permeability and moisture permeability.
軟化温度の異なる２種類以上の重合体からなる潜在捲縮
能を有する複合繊維の繊維ウェブを、対の加熱ローラー
でプレスし、更に加熱ローラー面に接触させることによ
って、複合繊維の低温軟化重合体成分によって繊維間の
接着を、また複合繊維の熱的特性の異方性によって捲縮
の発現と収縮を生じさせる。それによって高伸縮性の不
織布となる。A fiber web of composite fibers having latent crimp ability made of two or more types of polymers with different softening temperatures is pressed with a pair of heated rollers, and further brought into contact with the heating roller surface to produce a low-temperature softening polymer of composite fibers. The components cause adhesion between the fibers, and the anisotropy of the thermal properties of the composite fibers causes crimp and shrinkage. This results in a highly stretchable nonwoven fabric.
次ぎに、本発明の実施態様を具体的な実施例で説明する
。なお、実施例中、特に断りのない限り部および％は重
量によるものである。
実施例１
単繊維の繊度１．５デニール、繊維長５１ｍ＋ｍのポリ
エチレン−ポリプロピレン系複合繊維１００％をカード
ウニバーで平均目付５０ｇ／ｍ”の繊維ウェブを形成し
、１２０℃に加熱したビンポイントエンポスローラーと
ｌ／５℃に加熱したフラットローラーとの間を通過させ
、引き統きフラットローラー表面に３７５周の長さを巻
き付けて熱処理し、不織布に収縮を付与した。面積収縮
率は約６２％、収縮後の平均目付１３２ｇ／ｍ”、見掛
は密度０．２３ｇ／ｃｓ＋３の不織布を得た。この不織
布はエンポスローラーのビン跡がきれいな模様状につい
たものとなり、伸縮性が高く、外用薬基布に好適なもの
であった。
比較例１．２
実施例１の繊維ウェブを処理する両ローラーの温度を（
１）１００℃、（２）１３５℃の２条件とした以外は実
施例１と同様に繊維ウェブを処理した。
ローラー温度１３５℃で処理したものはウェブが７ラツ
トローラーに巻き付き、工程通過性が悪いものであった
。
得られた各不織布の物性を表１に示した。
（以下余白）
表１
実施例２
ポリエチレンテレフタレート５５部とイソフタル酸１２
モル％を共重合したポリエステル４５部からなるサイド
バイサイド型複合繊維で、単繊維繊度１．５デニール、
繊維長５１ｇ＋■、機械捲縮の平均捲縮数１６個／ ２
５ ａｍの短繊維を用い、平均目付７０ｇ／＋ｍ”のパ
ラレルウェブを作り、１７５℃に加熱した深い凹凸の模
様エンポスローラーと、１４０℃に加熱したフラットロ
ーラーとの間を通過させ、引き統いてフラットローラー
表面に３１５濁の長さを巻き付けて熱処理収縮した。得
られた収縮不織布は面積収縮率４８．２％、平均目付１
３５ｇ／ｍ”であって、繊維には平均捲縮数５０側／２
５ｍ−以上のマイクロクリンプが発生したものとなった
。そして、不織布面は模様状に繊維間が固定されたもの
となっており、切断強力および伸縮性が高く、薬剤の塗
布性が良く、外用薬基布に好適であった。Next, embodiments of the present invention will be explained with specific examples. In the examples, parts and percentages are by weight unless otherwise specified. Example 1 100% polyethylene-polypropylene composite fibers with a single fiber fineness of 1.5 denier and a fiber length of 51 m+m were formed into a fiber web with an average basis weight of 50 g/m'' using a card univer, and heated to 120°C to form a fibrous web using a bin point empos. The nonwoven fabric was passed between a roller and a flat roller heated to 1/5°C, and then heat-treated by wrapping it around the surface of the flat roller for 375 turns to give the nonwoven fabric shrinkage.The area shrinkage rate was about 62%. A nonwoven fabric having an average basis weight after shrinkage of 132 g/m'' and an apparent density of 0.23 g/cs+3 was obtained. This nonwoven fabric had a neat pattern of embossing roller bottle marks, had high elasticity, and was suitable for use as a base fabric for external medicines. Comparative Example 1.2 The temperature of both rollers processing the fibrous web of Example 1 was set to (
The fibrous web was treated in the same manner as in Example 1, except that the two conditions were 1) 100°C and (2) 135°C. In the case where the web was processed at a roller temperature of 135° C., the web was wrapped around the 7-layer roller, and the processability was poor. Table 1 shows the physical properties of each of the obtained nonwoven fabrics. (Left below) Table 1 Example 2 55 parts of polyethylene terephthalate and 12 parts of isophthalic acid
A side-by-side type composite fiber consisting of 45 parts of polyester copolymerized with mol%, single fiber fineness of 1.5 denier,
Fiber length 51g+■, average number of mechanical crimps 16/2
A parallel web with an average basis weight of 70 g/+m was made using short fibers of 5 am, passed between a deep uneven pattern embossing roller heated to 175°C and a flat roller heated to 140°C, and pulled. A length of 315 mm was wrapped around the surface of a flat roller and heat treated to shrink.The resulting shrinkable nonwoven fabric had an area shrinkage rate of 48.2% and an average basis weight of 1.
35 g/m", and the fiber has an average number of crimps of 50/2
A micro crimp of 5 m or more was generated. The surface of the nonwoven fabric had fixed fibers in a pattern, had high cutting strength and elasticity, and had good drug applicability, making it suitable for use as a base fabric for external drugs.
本発明で得た不織布は、伸縮性に富み、柔軟で肌添え性
、透気性、透湿性に優れていて、薬剤の塗布性の良い外
用薬基布などの衛生材料として好適な高伸縮性の不織布
である。The nonwoven fabric obtained in the present invention is highly stretchable, flexible, and has excellent skin adhesion, air permeability, and moisture permeability, and is a highly elastic material suitable for use as a sanitary material such as a base fabric for external medicines that has good drug applicability. It is a non-woven fabric.
Claims (1)
なり潜在捲縮能を有する複合繊維よりなるウエブを、該
複合繊維を構成する高温軟化重合体成分は軟化せず低温
軟化重合体成分が軟化する温度であって、かつ該複合繊
維の捲縮発現温度以上に加熱した非連続模様を有するエ
ンポスローラーとフラットローラーとの間で押圧し、引
き統き該エンポスローラー又はフラットローラー表面に
少なくともｌ／５周の長さを接触させることにより、該
繊維ウエブを非連続模様状に少なくとも一部を熱固着す
るとともに３０〜７０％面積収縮させて該複合繊維の捲
縮を発現させることを特徴とする高伸縮性不織布の製造
方法。1) A web made of composite fibers made of at least two types of polymers having different softening temperatures and having a latent crimp ability, in which the high temperature softening polymer component constituting the composite fiber does not soften, but the low temperature softening polymer component softens. Press between an embossing roller having a discontinuous pattern heated to a temperature higher than the crimping temperature of the composite fiber and a flat roller, and pulling at least 1/5 onto the surface of the embossing roller or flat roller. The fiber web is heat-fixed at least in part in a discontinuous pattern by bringing the circumferential lengths into contact, and the fiber web is contracted by 30 to 70% in area to develop crimp of the composite fiber. Method for manufacturing stretchable nonwoven fabric.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1041381A JP2544798B2 (en) | 1989-02-20 | 1989-02-20 | Method for manufacturing highly stretchable nonwoven fabric |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1041381A JP2544798B2 (en) | 1989-02-20 | 1989-02-20 | Method for manufacturing highly stretchable nonwoven fabric |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02221450A true JPH02221450A (en) | 1990-09-04 |
| JP2544798B2 JP2544798B2 (en) | 1996-10-16 |
Family
ID=12606817
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1041381A Expired - Fee Related JP2544798B2 (en) | 1989-02-20 | 1989-02-20 | Method for manufacturing highly stretchable nonwoven fabric |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2544798B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1991017296A1 (en) * | 1990-05-01 | 1991-11-14 | Uni-Charm Co. Ltd | Stretchable nonwoven polyolefin fabric and production thereof |
| US6888046B2 (en) | 2002-02-25 | 2005-05-03 | Kao Corporation | Topsheet for absorbent article |
| JP2005307422A (en) * | 2004-03-22 | 2005-11-04 | Kureha Ltd | Stretchable nonwoven fabric to which printing is rendered and method for producing the same |
| JP2011137247A (en) * | 2009-12-25 | 2011-07-14 | Kao Corp | Method for producing three-dimensionally formed nonwoven fabric |
-
1989
- 1989-02-20 JP JP1041381A patent/JP2544798B2/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1991017296A1 (en) * | 1990-05-01 | 1991-11-14 | Uni-Charm Co. Ltd | Stretchable nonwoven polyolefin fabric and production thereof |
| GB2250303B (en) * | 1990-05-01 | 1994-10-05 | Chisso Corp | Method of making polyolefin containing stretch non-woven fabric |
| US6888046B2 (en) | 2002-02-25 | 2005-05-03 | Kao Corporation | Topsheet for absorbent article |
| JP2005307422A (en) * | 2004-03-22 | 2005-11-04 | Kureha Ltd | Stretchable nonwoven fabric to which printing is rendered and method for producing the same |
| JP2011137247A (en) * | 2009-12-25 | 2011-07-14 | Kao Corp | Method for producing three-dimensionally formed nonwoven fabric |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2544798B2 (en) | 1996-10-16 |
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