JP2980261B2 - Method for producing fiber sheet - Google Patents
Method for producing fiber sheetInfo
- Publication number
- JP2980261B2 JP2980261B2 JP20756191A JP20756191A JP2980261B2 JP 2980261 B2 JP2980261 B2 JP 2980261B2 JP 20756191 A JP20756191 A JP 20756191A JP 20756191 A JP20756191 A JP 20756191A JP 2980261 B2 JP2980261 B2 JP 2980261B2
- Authority
- JP
- Japan
- Prior art keywords
- polyvinyl alcohol
- fiber
- degree
- polymer
- water
- 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 - Fee Related
Links
Description
【０００１】[0001]
【産業上の利用分野】本発明は、繊維集合体に高分子弾
性体を含有した柔軟な人工皮革等の製造方法に関する。
更に詳しくは、繊維集合体に高分子弾性体を含浸すると
きの繊維集合体の仮固定法の改良に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a soft artificial leather or the like containing an elastic polymer in a fiber assembly.
More specifically, the present invention relates to an improvement in a method for temporarily fixing a fiber assembly when the fiber assembly is impregnated with an elastic polymer.
【０００２】[0002]
【従来の技術】従来、人工皮革等に用いられる不織布や
編織物等の繊維集合体に高分子弾性体を含有した繊維シ
ート状物の製造方法において、高分子弾性体を含浸する
ときの繊維シート状物の形態変化を防止するために水溶
性高分子等を付与して繊維集合体を仮固定した状態で高
分子弾性体を含浸、凝固し、次いで該水溶性高分子を溶
解除去することはよく知られた技術である。2. Description of the Related Art Conventionally, in a method for producing a fibrous sheet material containing a polymer elastic body in a fiber aggregate such as a nonwoven fabric or a knitted fabric used for artificial leather or the like, the fiber sheet is impregnated with the polymer elastic body. It is possible to impregnate and coagulate the polymer elastic body in a state in which the fiber aggregate is temporarily fixed by applying a water-soluble polymer or the like in order to prevent a change in the form of the solid, and then dissolve and remove the water-soluble polymer. This is a well-known technique.
【０００３】例えば、繊維集合体に水溶性高分子を付与
し圧縮成形した後高分子弾性体を含浸、凝固する方法が
特公昭45−18745号公報、特公昭48−11928号公報、特公
昭51−7721号公報、特公昭51−32681号公報等に記載さ
れている。これらの方法において使用される水溶性高分
子としてはポリビニルアルコール、澱粉、カルボキシメ
チルセルロース等が例示されている。[0003] For example, a method of impregnating and coagulating a fiber assembly with a water-soluble polymer, compressing it, and then impregnating and coagulating a polymer elastic body is disclosed in JP-B-45-18745, JP-B-48-11928 and JP-B-51. No. 7721, Japanese Patent Publication No. 51-32681, and the like. Examples of the water-soluble polymer used in these methods include polyvinyl alcohol, starch, carboxymethyl cellulose, and the like.
【０００４】これら水溶性高分子を付与することによっ
て、高分子弾性体を含浸、凝固するときの繊維集合体の
形態安定性を維持することと共に、繊維表面を水溶性高
分子で被覆することにより繊維と高分子弾性体とが接着
することを防止し、より柔軟な風合いが得られることが
知られている。By providing these water-soluble polymers, it is possible to maintain the morphological stability of the fiber assembly when impregnating and coagulating the elastic polymer, and to coat the fiber surface with the water-soluble polymer. It is known that a fiber and a polymer elastic body are prevented from adhering to each other and a softer texture can be obtained.
【０００５】[0005]
【発明が解決しようとする課題】従来用いられていた水
溶性高分子は、代表的な高分子弾性体のポリウレタンの
溶剤であるジメチルホルムアミドに対して形態安定性が
不十分であったり、高分子弾性体の凝固完了前に凝固液
（主として水）に溶け出して形態変化を起こし易かった
り、乾燥時のマイグレーションが大きく繊維集合体の中
心部においては繊維表面を水溶性高分子が覆っておら
ず、その結果、得られる繊維シート状物の風合いが固い
ものとなる等の問題点があった。The water-soluble polymer which has been conventionally used has insufficient form stability with respect to dimethylformamide which is a typical solvent for a polymer elastic polyurethane. Before the solidification of the elastic body is completed, it easily dissolves in the coagulation liquid (mainly water) and changes its form easily. Migration during drying is large and the water-soluble polymer does not cover the fiber surface at the center of the fiber assembly. However, as a result, there is a problem that the texture of the obtained fiber sheet becomes hard.
【０００６】このような問題を解決するために水溶性高
分子の付着量を増大させると乾燥時のマイグレーション
が更に大きくなり繊維集合体の表面のみに強固な被膜を
形成し易くなり、また、後工程での水溶性高分子の溶解
除去に多量の温水を必要とする等の問題を生ずる。If the amount of the water-soluble polymer attached is increased to solve such a problem, migration during drying is further increased, and a strong film is easily formed only on the surface of the fiber aggregate. Problems such as the necessity of a large amount of hot water for dissolving and removing the water-soluble polymer in the process are caused.
【０００７】本発明はこれらの問題を解決した、比較的
少量の付与でジメチルホルムアミドや凝固液中での形態
保持性が高く、後工程での溶解除去が容易でかつ乾燥時
のマイグレーションが小さく柔軟な繊維シート状物の得
られる繊維集合体の水溶性高分子による仮固定方法を提
供するものである。The present invention has solved these problems. It has a high form retention in dimethylformamide or a coagulating solution by a relatively small amount of application, is easy to dissolve and remove in a later step, and has a small migration during drying. It is intended to provide a method for temporarily fixing a fiber aggregate obtained from a fibrous sheet-like material with a water-soluble polymer.
【０００８】[0008]
【課題を解決するための手段】本発明は、繊維集合体に
水溶性高分子を付与して仮固定し高分子弾性体を含浸し
凝固した後に該水溶性高分子を溶解除去する繊維シート
状物の製造方法において、該水溶性高分子として重合度
2000以上、ケン化度80モル％以上97％以下のポリビニル
アルコールを用いることを特徴とする繊維シート状物の
製造方法である。SUMMARY OF THE INVENTION The present invention is directed to a fibrous sheet in which a water-soluble polymer is applied to a fiber assembly, temporarily fixed, impregnated with a polymer elastic material, coagulated, and then dissolved and removed. In the method for producing a product, the degree of polymerization is
A method for producing a fibrous sheet, characterized by using polyvinyl alcohol having a saponification degree of not less than 2000 and not less than 80 mol% and not more than 97%.
【０００９】[0009]
【作用】本発明で使用する繊維集合体は、従来から繊維
シート状物の製造に用いられている不織布や編織物は全
て特に制限なく用いられる。不織布には補強用等の目的
で編織物等が内部または表面に積層されたものでも良
く、構成繊維は溶剤処理等により繊維成分の一部を除去
することにより極細繊維とするものであっても良く、ま
た通常の繊維であっても良い。通常の繊維の場合には、
本発明により高分子弾性体が繊維と接着することを阻害
する効果が高いため、従来よりもより柔軟な風合いのも
のが得られる。As the fiber aggregate used in the present invention, any non-woven fabric or knitted fabric conventionally used for producing a fiber sheet can be used without any particular limitation. The nonwoven fabric may be one in which a knitted fabric or the like is laminated on the inside or surface for the purpose of reinforcement or the like, and the constituent fibers may be ultrafine fibers by removing a part of the fiber component by a solvent treatment or the like. Good, and may be ordinary fibers. For ordinary fibers,
According to the present invention, the effect of inhibiting the elastic polymer from adhering to the fiber is high, so that a softer texture can be obtained than before.
【００１０】本発明において用いるポリビニルアルコー
ルは、重合度が2000以上、好ましくは2000以上5000以
下、更に好ましくは2400以上4000以下のものである。重
合度が2000未満であると、乾燥時のマイグレーションが
大きく、また、ジメチルホルムアミドや凝固液に対する
安定性が不十分である。重合度が大きくなると、温水に
対する溶解速度が小さくなり、溶解除去に多大の費用が
かかることとなり工業生産上不利となる。なお、本発明
で重合度は比粘度（ηsp）が0.4〜0.8となるような濃度
のポリビニルアルコール水溶液を用いてＪＩＳ Ｋ−６
７２６の方法で測定したものである。The polyvinyl alcohol used in the present invention has a degree of polymerization of 2,000 or more, preferably 2,000 to 5,000, more preferably 2,400 to 4,000. When the degree of polymerization is less than 2,000, migration during drying is large, and stability to dimethylformamide and a coagulating solution is insufficient. When the degree of polymerization is increased, the dissolution rate in warm water is reduced, so that a great deal of cost is required for dissolution and removal, which is disadvantageous in industrial production. In the present invention, the degree of polymerization is determined in accordance with JIS K-6 using an aqueous solution of polyvinyl alcohol having a specific viscosity (η sp ) of 0.4 to 0.8.
726.
【００１１】本発明で用いるポリビニルアルコールのケ
ン化度は80モル％以上97モル％以下である。ケン化度が
80モル％未満であるとジメチルホルムアミド中での繊維
集合体の形態安定化効果が十分でなく、ポリウレタン溶
液含浸時のローラープレス等による圧縮変形等に対する
形態維持が十分できなかったり、また、高分子弾性体の
凝固工程において凝固完了前に凝固液中に溶出し易い。
ケン化度が97モル％以上であると温水に対する溶解性が
低下し、高分子弾性体凝固後の溶解除去が不十分となり
繊維シート状物の風合いが固くなる。従って、ケン化度
は80モル％以上97モル％以下である必要があるが、実際
の使用に当たっては、高分子弾性体の含浸、凝固条件や
水溶性高分子の溶解除去条件等の組み合わせによってポ
リビニルアルコールの重合度とケン化度の組み合わせを
選択することが望ましい。The degree of saponification of the polyvinyl alcohol used in the present invention is from 80 mol% to 97 mol%. Degree of saponification
If it is less than 80 mol%, the effect of stabilizing the shape of the fiber aggregate in dimethylformamide is not sufficient, and the shape cannot be sufficiently maintained against compression deformation by a roller press or the like during the impregnation of the polyurethane solution, In the coagulation step of the elastic body, it is easily eluted into the coagulation liquid before the coagulation is completed.
If the degree of saponification is 97 mol% or more, the solubility in hot water decreases, and the dissolution and removal after coagulation of the elastic polymer become insufficient, and the texture of the fiber sheet becomes hard. Therefore, the degree of saponification needs to be not less than 80 mol% and not more than 97 mol%. However, in actual use, the degree of saponification depends on the combination of the conditions of impregnation of the elastic polymer, coagulation conditions, and dissolution and removal conditions of the water-soluble polymer. It is desirable to select a combination of the degree of polymerization and the degree of saponification of the alcohol.
【００１２】高分子弾性体の凝固温度を比較的高くする
場合には、溶解温度の比較的高いポリビニルアルコー
ル、即ちケン化度の比較的高いポリビニルアルコールを
用いる。この場合、重合度が共に高いと溶解速度が遅く
なり溶解温度等の溶解除去条件を強くする必要があり、
乾燥時のマイグレーションを満足する範囲内で重合度が
低いことが好ましい。高分子弾性体の凝固温度を低くす
る場合にはポリビニルアルコールの溶解温度も比較的低
くても良く、ケン化度の低いポリビニルアルコールが使
用できる。この場合重合度は特に小さくする必要はな
く、上記の範囲内で任意に選ばれる。When the solidification temperature of the elastic polymer is relatively high, polyvinyl alcohol having a relatively high dissolution temperature, that is, polyvinyl alcohol having a relatively high degree of saponification, is used. In this case, it is necessary to strengthen the dissolution and removal conditions such as the dissolution temperature and the dissolution rate if the degree of polymerization is high,
It is preferable that the degree of polymerization is low within a range that satisfies migration during drying. When lowering the solidification temperature of the elastic polymer, the dissolution temperature of polyvinyl alcohol may be relatively low, and polyvinyl alcohol having a low degree of saponification can be used. In this case, the degree of polymerization does not need to be particularly small and is arbitrarily selected within the above range.
【００１３】ポリビニルアルコールは前記の繊維集合体
に水溶液として付与し乾燥する。ポリビニルアルコール
水溶液の濃度は含浸時の粘度、繊維集合体の含浸のし易
さ、ポリビニルアルコールの目標とする付着量等によっ
ても異なり一概には言えないが、通常20％以下、好まし
くは５〜15％の濃度が一応の目安となる。本発明のポリ
ビニルアルコールは乾燥時のマイグレーションが小さ
く、比較的低付着量で効果を奏するが、ポリビニルアル
コールの付着量は固形分で通常１〜20重量％、好ましく
は５〜15重量％の範囲である。付着量が少ないと十分な
形態安定性が得られず、また、多いと十分に溶解除去が
行いにくく更に廃液の処理等の点からも不経済である。
ポリビニルアルコールの乾燥条件は特に限定されない
が、必要以上に強い条件で乾燥するとポリビニルアルコ
ールが乾熱処理されることにより溶解性が低下し溶解除
去が不十分となる場合があるので注意する必要がある。The polyvinyl alcohol is applied as an aqueous solution to the fiber assembly and dried. The concentration of the aqueous polyvinyl alcohol solution varies depending on the viscosity at the time of impregnation, the ease with which the fiber aggregate is impregnated, the target amount of polyvinyl alcohol to be attached, and the like, and cannot be unconditionally determined, but is usually 20% or less, preferably 5 to 15 % Concentration is a rough guide. The polyvinyl alcohol of the present invention has a small migration during drying and is effective with a relatively low adhesion amount, but the adhesion amount of polyvinyl alcohol is usually 1 to 20% by weight, preferably 5 to 15% by weight in solid content. is there. If the amount is small, sufficient morphological stability cannot be obtained, and if the amount is large, it is difficult to sufficiently dissolve and remove, and it is uneconomical in terms of waste liquid treatment and the like.
The conditions for drying the polyvinyl alcohol are not particularly limited, but care should be taken when drying under unnecessarily strong conditions because the polyvinyl alcohol may be subjected to a dry heat treatment, resulting in reduced solubility and insufficient dissolution and removal.
【００１４】本発明で用いるポリビニルアルコールには
効果を損なわない範囲で変性されたものを用いても良
く、また、ポリビニルアルコール水溶液には必要に応じ
て増粘剤、消泡剤、繊維との親和性を改善する界面活性
剤等を添加しても良い。更にまた、澱粉やカルボキシメ
チルセルロースなどを添加併用することもできる。The polyvinyl alcohol used in the present invention may be modified as long as the effect is not impaired, and the polyvinyl alcohol aqueous solution may be used, if necessary, with a thickener, a defoaming agent, and an affinity for fibers. You may add surfactant etc. which improve a property. Furthermore, starch, carboxymethylcellulose and the like can be added and used together.
【００１５】ポリビニルアルコールを付与して形態安定
化された不織布や編織物などの繊維集合体は、ポリウレ
タン等の高分子弾性体液を含浸、凝固する。含浸液の組
成や含浸方法、凝固条件等は従来公知の方法が採用でき
る。高分子弾性体を凝固した後高分子弾性体の溶剤を洗
浄除去した後または洗浄除去と同時にポリビニルアルコ
ールを溶解除去する。溶解除去温度は凝固した高分子弾
性体を損傷しない条件が選択され、通常60〜98℃の範囲
である。A fiber aggregate such as a nonwoven fabric or a knitted fabric which has been stabilized by providing polyvinyl alcohol is impregnated with an elastic polymer liquid such as polyurethane and solidified. Conventionally known methods can be employed for the composition of the impregnation liquid, the impregnation method, the solidification conditions, and the like. After coagulation of the polymer elastic body, polyvinyl alcohol is dissolved and removed after or simultaneously with washing and removing the solvent of the polymer elastic body. The dissolution and removal temperature is selected under conditions that do not damage the solidified polymer elastic body, and is usually in the range of 60 to 98 ° C.
【００１６】[0016]
【実施例】次に本発明の実施態様を具体的な実施例で説
明する。実施例中、％は断りのない限り重量に関するも
のである。なお、実施例中での評価は下記によった。ポ
リビニルアルコールのマイグレーション：乾燥後の繊維
シートの厚さ方向の断面にヨウ素のホウ酸水溶液を付与
しポリビニルアルコールを着色し50倍の実体顕微鏡で観
察した。青色に着色した部分の分布状態を４段階に評価
した。 ◎：全体が均一に染まっている。 ○：厚みの中心部がやや薄めであるが、全体がほぼ均一
に染まっている。 △：中心部と表層部で濃度の差がやや大きい。 ×：表層部が極めて濃く染まっている。EXAMPLES Next, the embodiments of the present invention will be described with reference to specific examples. In the examples, percentages relate to weight unless otherwise specified. The evaluation in the examples was as follows. Migration of polyvinyl alcohol: An aqueous solution of boric acid of iodine was applied to the cross section in the thickness direction of the dried fiber sheet to color the polyvinyl alcohol, and observed with a stereoscopic microscope of 50 times. The distribution state of the portion colored blue was evaluated on a four-point scale. A: The whole is uniformly dyed. ：: The center of the thickness is slightly thinner, but the whole is almost uniformly dyed. Δ: The difference in concentration between the central part and the surface part is slightly large. ×: The surface layer is very darkly dyed.
【００１７】N,N'-ジメチルホルムアミド（ＤＭＦ）中
での形態保持性： ポリビニルアルコールにより仮固定
した不織布を巾2.5cmの短冊状に切り取り500ｇの荷重を
かけてＤＭＦ中に３分間浸漬後取り出し、浸漬前後での
寸法変化により次の４段階に評価した。 ◎：寸法変化が１％以下 ○：寸法変化が１〜５％ △：寸法変化が５〜10％ ×：寸法変化が10％以上Shape retention in N, N'-dimethylformamide (DMF): A nonwoven fabric temporarily fixed with polyvinyl alcohol is cut into a strip having a width of 2.5 cm, immersed in DMF for 3 minutes under a load of 500 g, and taken out. And the dimensional change before and after immersion were evaluated in the following four stages. ◎: Dimensional change is 1% or less ○: Dimensional change is 1 to 5% △: Dimensional change is 5 to 10% ×: Dimensional change is 10% or more
【００１８】ポリビニルアルコールの溶解除去性： ポ
リビニルアルコールを付与した不織布を90℃の温水中に
１時間浸漬後、絞液し乾燥した。処理前後での重量変化
より付着ポリビニルアルコールの除去率を求めた。Dissolution and removal of polyvinyl alcohol: The nonwoven fabric provided with polyvinyl alcohol was immersed in warm water at 90 ° C. for 1 hour, squeezed, and dried. The removal rate of the adhered polyvinyl alcohol was determined from the change in weight before and after the treatment.
【００１９】風合い： ポリビニルアルコールで仮固定
した不織布にポリウレタン溶液を含浸、凝固し、熱水に
よりＰＶＡを溶解除去した繊維シート状物を触感により
次の４段階に評価した。 ◎：極めて柔軟である ○：柔軟である △：やや固い ×：極めて固いHand: A nonwoven fabric temporarily fixed with polyvinyl alcohol is impregnated with a polyurethane solution, coagulated, and PVA is dissolved and removed with hot water. ◎: extremely flexible ○: flexible △: slightly hard ×: extremely hard
【００２０】実施例１ 溶融紡糸、延伸された２デニールのポリエチレンテレフ
タレート繊維を捲縮し、繊維長41mmにカットしてステー
プル繊維とし、カード、ウエッバーを経て得たウエブを
ニードルパンチを行い、熱水中で収縮処理し乾燥して平
均目付300ｇ／m2、密度0.25ｇ／cm3の繊維絡合不織布を
得た。Example 1 Melt-spun and stretched 2-denier polyethylene terephthalate fiber was crimped, cut to a fiber length of 41 mm to form a staple fiber, and the web obtained through a card and a webber was subjected to needle punching and hot water The resultant was subjected to shrinkage treatment and dried to obtain a fiber-entangled nonwoven fabric having an average basis weight of 300 g / m 2 and a density of 0.25 g / cm 3 .
【００２１】次いで、重合度3300、ケン化度88モル％の
ポリビニルアルコールの５％水溶液に上記絡合不織布を
浸漬し絞液した。この不織布を熱風乾燥機で120℃、30
分、更に140℃で20分乾燥しポリビニルアルコールで仮
固定された不織布とした。このときのポリビニルアルコ
ール付着量は固形分で８％であった。この仮固定した不
織布の厚さ方向の断面にヨウ素のホウ酸水溶液を付与し
ポリビニルアルコールを着色し50倍の実体顕微鏡で観察
したところ、青色に着色した部分は断面上均一に分散し
ており、乾燥時のマイグレーションは認められなかっ
た。また、この仮固定した不織布からのポリビニルアル
コールの溶解除去率は95％と高く、ポリビニルアルコー
ル溶解除去後の不織布の風合いはポリビニルアルコール
付与前と同様に柔軟なものであった。Next, the entangled nonwoven fabric was immersed in a 5% aqueous solution of polyvinyl alcohol having a degree of polymerization of 3300 and a saponification degree of 88 mol%, and was squeezed. This nonwoven fabric is heated at 120 ° C for 30
And further dried at 140 ° C. for 20 minutes to obtain a non-woven fabric temporarily fixed with polyvinyl alcohol. At this time, the attached amount of polyvinyl alcohol was 8% in solid content. When a boric acid aqueous solution of iodine was applied to the cross section in the thickness direction of the temporarily fixed nonwoven fabric and the polyvinyl alcohol was colored and observed with a stereoscopic microscope of 50 times, the portion colored blue was uniformly dispersed on the cross section, No migration during drying was observed. The dissolution and removal rate of polyvinyl alcohol from the temporarily fixed nonwoven fabric was as high as 95%, and the texture of the nonwoven fabric after dissolution and removal of polyvinyl alcohol was as soft as before the application of polyvinyl alcohol.
【００２２】更に、ポリビニルアルコールで仮固定した
不織布にポリウレタン溶液を含浸、凝固して繊維集合体
中に高分子弾性体を含有する繊維シート状物に加工し
た。即ち、ポリウレタンの15％ＤＭＦ溶液に凝固調節剤
を添加した含浸液を上記不織布に含浸し、絞液した後Ｄ
ＭＦ水溶液中でポリウレタンを凝固させ、続いて90℃熱
水中に１時間浸漬しポリビニルアルコールを溶解除去し
た後絞液、乾燥した。ポリウレタン溶液含浸時のローラ
ープレスに対する形態安定性は良好であり、得られた繊
維シート状物の風合いは柔軟で優れており、表面状態も
シワの発生等もなく平滑性良好であった。Further, the polyurethane solution was impregnated into the non-woven fabric temporarily fixed with polyvinyl alcohol, solidified, and processed into a fiber sheet containing a polymer elastic body in a fiber assembly. That is, the nonwoven fabric is impregnated with an impregnating solution obtained by adding a coagulation controlling agent to a 15% DMF solution of polyurethane, and then squeezed.
The polyurethane was coagulated in an aqueous MF solution, and then immersed in hot water at 90 ° C. for 1 hour to dissolve and remove the polyvinyl alcohol. The morphological stability against the roller press during the impregnation of the polyurethane solution was good, the texture of the obtained fiber sheet-like material was soft and excellent, and the surface state was good without any wrinkles and the like, and the smoothness was good.
【００２３】実施例２〜５、比較例１〜４ 実施例１の繊維絡合不織布を用い、表１に示すポリビニ
ルアルコールを用いて実施例１と同様にポリビニルアル
コール付与とポリウレタン溶液の含浸、凝固を行った。
結果を実施例１と共に表１に示す。Examples 2 to 5, Comparative Examples 1 to 4 Using the fiber-entangled nonwoven fabric of Example 1, polyvinyl alcohol shown in Table 1 was used and polyvinyl alcohol was applied and the polyurethane solution was impregnated and coagulated in the same manner as in Example 1. Was done.
The results are shown in Table 1 together with Example 1.
【００２４】[0024]
【表１】 [Table 1]
【００２５】実施例２〜５はそれぞれ評価に僅かの違い
はあるもののいずれも良好であった。比較例１はポリビ
ニルアルコールの溶解除去性には優れているが、ＤＭＦ
中での形態保持効果が低く得られた繊維シート状物は表
面のシワが発生していた。比較例２においては比較例１
のポリビニルアルコール濃度を上げ付着量を増大させた
ところＤＭＦ中での形態保持効果は若干改善されたが、
乾燥時のポリビニルアルコールのマイグレーションが大
きく、得られた繊維シート状物の風合いはやや固めであ
った。Examples 2 to 5 were all good although there were slight differences in the evaluation. Comparative Example 1 is excellent in dissolving and removing property of polyvinyl alcohol, but DMF
The fiber sheet obtained with a low shape retention effect in the inside had surface wrinkles. In Comparative Example 2, Comparative Example 1
When the polyvinyl alcohol concentration was increased to increase the amount of adhesion, the shape retention effect in DMF was slightly improved.
The migration of polyvinyl alcohol during drying was large, and the texture of the obtained fiber sheet-like material was slightly hard.
【００２６】比較例３においてはポリビニルアルコール
のケン化度の高いものを使用して比較例２と同様に付着
量を多くしたところ、ＤＭＦ中での形態保持効果の改善
は小さく、ポリビニルアルコールの溶解除去性が劣るた
め風合いが固く、表面にシワが発生した。また、比較例
４は重合度、ケン化度が共に高いポリビニルアルコール
を用いたところ、付着量が少なくてもＤＭＦ中での形態
保持効果が高く表面平滑な繊維シート状物が得られた
が、ポリビニルアルコールの溶解除去性が極めて悪く残
存するポリビニルアルコールのため、風合いは極めて固
いものであった。In Comparative Example 3, when a polyvinyl alcohol having a high degree of saponification was used and the amount of adhesion was increased in the same manner as in Comparative Example 2, the improvement of the shape retention effect in DMF was small, and Due to poor removability, the texture was hard and wrinkles occurred on the surface. In Comparative Example 4, when a polyvinyl alcohol having both a high degree of polymerization and a high degree of saponification was used, a fiber sheet having a high shape retention effect in DMF and a smooth surface was obtained even with a small amount of adhesion. The texture was extremely hard because the polyvinyl alcohol was very poor in dissolving and removing properties of the remaining polyvinyl alcohol.
【００２７】[0027]
【発明の効果】本発明の方法によれば、繊維集合体の仮
固定用のポリビニルアルコールの付着量を少なくしても
高分子弾性体の含浸、凝固時の形態保持効果が高く、か
つ溶解除去が容易であり風合いの柔軟な繊維シート状物
を製造することができる。更に、ポリビニルアルコール
の使用量が少ないため、排水処理のコストも低減でき
る。According to the method of the present invention, even when the amount of polyvinyl alcohol for temporarily fixing the fiber aggregate is reduced, the effect of impregnating the polymer elastic body and maintaining the shape during coagulation is high, and dissolving and removing. And a flexible fiber sheet having a good texture can be produced. Furthermore, since the amount of polyvinyl alcohol used is small, the cost of wastewater treatment can be reduced.
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.6，ＤＢ名) D04H 1/64 D06N 3/00 ──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. 6 , DB name) D04H 1/64 D06N 3/00
Claims (1)
固定し高分子弾性体を含浸し凝固した後に該水溶性高分
子を溶解除去する繊維シート状物の製造方法において、
該水溶性高分子として重合度2000以上、ケン化度80モル
％以上97％以下のポリビニルアルコールを用いることを
特徴とする繊維シート状物の製造方法。1. A method for producing a fibrous sheet-like material, wherein a water-soluble polymer is imparted to a fiber assembly, temporarily fixed, impregnated with an elastic polymer, coagulated, and then dissolved and removed.
A method for producing a fibrous sheet, comprising using polyvinyl alcohol having a degree of polymerization of 2,000 or more and a degree of saponification of 80 mol% to 97% as the water-soluble polymer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20756191A JP2980261B2 (en) | 1991-07-23 | 1991-07-23 | Method for producing fiber sheet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20756191A JP2980261B2 (en) | 1991-07-23 | 1991-07-23 | Method for producing fiber sheet |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0533256A JPH0533256A (en) | 1993-02-09 |
| JP2980261B2 true JP2980261B2 (en) | 1999-11-22 |
Family
ID=16541781
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20756191A Expired - Fee Related JP2980261B2 (en) | 1991-07-23 | 1991-07-23 | Method for producing fiber sheet |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2980261B2 (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4644971B2 (en) * | 2000-05-10 | 2011-03-09 | 東レ株式会社 | Method for producing leather-like sheet |
| ITMI20010516A1 (en) * | 2001-03-12 | 2002-09-12 | Alcantara Spa | PROCESS FOR THE PRODUCTION OF A MICROFIBROUS SUEDE NONWOVEN FABRIC WITHOUT THE USE OF ORGANIC SOLVENTS |
| KR100378762B1 (en) * | 2001-11-13 | 2003-04-03 | Haco Co Ltd | Non-woven fabric used in synthetic leather and artificial leather, method for manufacturing the same, and synthetic leather and artificial leather using the same |
| KR100542506B1 (en) * | 2004-04-07 | 2006-01-11 | 에이치디씨 주식회사 | Artificial polyurethane leather having high elasticity in four directions and method for preparing thereof |
| EP2896741B1 (en) * | 2012-09-14 | 2019-08-07 | Toray Industries, Inc. | Process for manufacturing a leather-like nonwoven fabric |
| KR102090355B1 (en) * | 2012-11-30 | 2020-03-17 | 도레이 카부시키가이샤 | Sheet-shaped object and process for producing said sheet-shaped object |
-
1991
- 1991-07-23 JP JP20756191A patent/JP2980261B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0533256A (en) | 1993-02-09 |
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