JPH0457789B2 - - Google Patents
Info
- Publication number
- JPH0457789B2 JPH0457789B2 JP17090685A JP17090685A JPH0457789B2 JP H0457789 B2 JPH0457789 B2 JP H0457789B2 JP 17090685 A JP17090685 A JP 17090685A JP 17090685 A JP17090685 A JP 17090685A JP H0457789 B2 JPH0457789 B2 JP H0457789B2
- Authority
- JP
- Japan
- Prior art keywords
- polyurethane elastomer
- polyvinyl alcohol
- impregnated
- fibers
- solution
- 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 34
- 229920003225 polyurethane elastomer Polymers 0.000 claims description 23
- 239000002649 leather substitute Substances 0.000 claims description 12
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 10
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 10
- 239000007788 liquid Substances 0.000 claims description 9
- 238000004519 manufacturing process Methods 0.000 claims description 6
- 239000003960 organic solvent Substances 0.000 claims description 6
- 239000002904 solvent Substances 0.000 claims description 6
- 229920001169 thermoplastic Polymers 0.000 claims description 2
- 239000004416 thermosoftening plastic Substances 0.000 claims description 2
- 230000001112 coagulating effect Effects 0.000 claims 1
- 239000000243 solution Substances 0.000 description 11
- 239000000463 material Substances 0.000 description 7
- 239000004745 nonwoven fabric Substances 0.000 description 7
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 description 6
- 239000010410 layer Substances 0.000 description 6
- -1 polyethylene terephthalate Polymers 0.000 description 5
- 239000004677 Nylon Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 229920001778 nylon Polymers 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 239000007864 aqueous solution Substances 0.000 description 3
- 238000001035 drying Methods 0.000 description 3
- 238000006116 polymerization reaction Methods 0.000 description 3
- 238000007127 saponification reaction Methods 0.000 description 3
- 239000002518 antifoaming agent Substances 0.000 description 2
- 230000015271 coagulation Effects 0.000 description 2
- 238000005345 coagulation Methods 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 238000005470 impregnation Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000004014 plasticizer Substances 0.000 description 2
- 229920000139 polyethylene terephthalate Polymers 0.000 description 2
- 239000005020 polyethylene terephthalate Substances 0.000 description 2
- 238000004080 punching Methods 0.000 description 2
- 229920003188 Nylon 3 Polymers 0.000 description 1
- 229920002292 Nylon 6 Polymers 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 239000006096 absorbing agent Substances 0.000 description 1
- 239000003429 antifungal agent Substances 0.000 description 1
- 229940121375 antifungal agent Drugs 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000010828 elution Methods 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 239000010985 leather Substances 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
- 239000004810 polytetrafluoroethylene Substances 0.000 description 1
- 229920005749 polyurethane resin Polymers 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
Landscapes
- Synthetic Leather, Interior Materials Or Flexible Sheet Materials (AREA)
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は表面平滑性に富む人工皮革の製造方法
に係り、更に詳しくは靴、鞄、衣料、ケース、ベ
ルト等の用途に適した風合の優れた表面平滑性に
富む人工皮革の製造方法に関する。[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a method for manufacturing artificial leather with excellent surface smoothness, and more specifically, the present invention relates to a method for producing artificial leather with a smooth surface, and more specifically, a texture suitable for use in shoes, bags, clothing, cases, belts, etc. The present invention relates to a method for producing artificial leather with excellent surface smoothness.
（従来技術）
従来、表面平滑な人工皮革を製造する方法とし
ては、ニードルパンチングにより短繊維交絡体を
製造し、この短繊維交絡体にポリビニルアルコー
ル水溶液を含浸被覆し、乾燥して繊維相互を固定
し、次いでポリウレタンエラストマーの水混和性
有機溶剤溶液を含浸し、水を主成分とするポリウ
レタンエラストマーの非溶媒中で凝固させた後乾
燥させて基材となし、この基材をそのままか若し
くは表面を漉き取り平滑面を得た後銀面層を形成
するポリウレタンエラストマーの水混和性有機溶
剤溶液を塗布し、これを湿式凝固させていた。(Prior art) Conventionally, as a method for manufacturing artificial leather with a smooth surface, an intertwined short fiber body is manufactured by needle punching, the intertwined short fiber body is impregnated and coated with an aqueous solution of polyvinyl alcohol, and the fibers are fixed together by drying. Then, the polyurethane elastomer is impregnated with a water-miscible organic solvent solution, coagulated in a water-based polyurethane elastomer non-solvent, and dried to form a base material. After a smooth surface was obtained, a solution of a polyurethane elastomer in a water-miscible organic solvent to form a grain layer was applied and wet-coagulated.
（発明が解決しようとする問題点）
従来法による場合、短繊維交絡体層と銀面層と
が密度や硬さで大きく異なり風合的にも天然皮革
にほど遠いものであるばかりでなく、漉き加工を
施した場合には繊維及びポリウレタン樹脂の両者
を除去することになり経済的なものとは言えなか
つた。(Problems to be Solved by the Invention) In the conventional method, the short fiber entangled layer and the grain layer differ greatly in density and hardness, and the texture is far from natural leather. When processing was carried out, both the fibers and the polyurethane resin were removed, which could not be said to be economical.
（問題を解決するための手段）
本発明の人工皮革の製造方法は、熱可塑性繊維
よりなる短繊維交絡体にポリビニルアルコール水
溶液を含浸し、乾燥して短繊維相互を固定した
後、片面をスライスマシンにより除去し、次いで
ポリウレタンエラストマーの水混和性有機溶剤溶
液を含浸した後、to−0.2≦Ｔmm（to：スライス後
の短繊維交絡体の厚み、Ｔ：絞液クリアランス）
なる条件を満足する絞液クリアランスで絞液し、
次いで非溶媒中に浸漬してポリウレタンエラスト
マーを微細な多孔質体として凝固させ、しかる
後、ポリビニルアルコールを溶解除去することか
らなるものである。(Means for Solving the Problem) The method for producing artificial leather of the present invention involves impregnating a short fiber entangled body made of thermoplastic fibers with an aqueous polyvinyl alcohol solution, drying it to fix the short fibers to each other, and then slicing one side. After removal by machine and then impregnation with a water-miscible organic solvent solution of polyurethane elastomer, t o -0.2≦Tmm (t o : thickness of short fiber entangled body after slicing, T: squeeze liquid clearance)
The liquid is squeezed with a liquid clearance that satisfies the following conditions.
The polyurethane elastomer is then immersed in a non-solvent to solidify it as a fine porous body, and then the polyvinyl alcohol is dissolved and removed.
本発明の構成については以下に詳細に説明す
る。 The configuration of the present invention will be explained in detail below.
短繊維交絡体は６ナイロン、6.6ナイロン、ポ
リエチレンテレフタレートよりなる群から選ばれ
た短繊維の単独或いは混合物のニードルパンチン
グにより得られたもので、ポリエチレンテレフタ
レートは熱収縮性繊維を含んでいてもよい。 The short fiber entangled body is obtained by needle punching short fibers selected from the group consisting of nylon 6, nylon 6.6, and polyethylene terephthalate, either singly or as a mixture, and the polyethylene terephthalate may contain heat-shrinkable fibers.
ポリビニルアルコールは、ポリウレタンエラス
トマー含浸、凝固工程中での非溶媒中への溶出速
度、繊維とポリウレタンエラストマーとの接着
性、繊維への接着性、繊維相互の固定等総合して
重合度、ケン化度、濃度、可塑剤、消泡剤、絞り
率、乾燥速度等条件設定する必要がある。 Polyvinyl alcohol has a high degree of polymerization and saponification, including impregnation with polyurethane elastomer, elution rate into non-solvent during coagulation process, adhesiveness between fiber and polyurethane elastomer, adhesion to fiber, and fixation of fibers to each other. It is necessary to set conditions such as concentration, plasticizer, antifoaming agent, squeezing rate, drying speed, etc.
スライスは、通常のエンドレス型ナイフを備え
たスライスマシンにより容易に行える。不繊布の
強度低下を最少限に抑えるためにスライスは所望
の平滑度を得るだけでよく、過度の厚味を取り去
ることは避けるべきである。 Slicing is easily accomplished by a slicing machine equipped with a conventional endless knife. In order to minimize the loss of strength of the non-woven fabric, the slices need only achieve the desired smoothness, and excessive thickness should be avoided.
ポリウレタンエラストマーは特に組成の限定は
なく、一般に人工皮革に使用されているポリウレ
タンエラストマーであればいずれのものも使用で
きる。但し、耐屈曲性、耐加水分解性、凝固性等
の点からポリウレタンエラストマーの分子量はで
きるだけ大きいことが望ましい。 The composition of the polyurethane elastomer is not particularly limited, and any polyurethane elastomer commonly used for artificial leather can be used. However, it is desirable that the molecular weight of the polyurethane elastomer is as large as possible from the viewpoints of bending resistance, hydrolysis resistance, coagulation properties, etc.
このポリウレタンエラストマーには必要に応じ
て顔料、紫外線吸収剤、酸化防止剤、界面活性
剤、柔軟剤、可塑剤、防黴剤、セル調整剤、消泡
剤、レベリング剤等添加される。使用される水混
和性有機溶剤はジメチルフオルムアミドが最も好
ましい。ポリビニルアルコールで繊維相互を固定
した短繊維交絡体の空隙部にポリウレタンエラス
トマーの水混和性有機溶剤溶液を含浸、充填した
後一定量付与するために一定間隙の一対の駆動ロ
ール間を通過させ余剰液を除去するが、この際駆
動ロールの間隙はポリビニルアルコールで繊維相
互を固定した短繊維交絡体の厚味に対して0.2mm
以上薄くては平滑性に富む人工皮革用基材は得ら
れ難い。従つてスライス後の短繊維交絡体の厚味
をto（mm）とし、駆動ロールの絞液間隙をＴ（mm）
とするとto−0.2≦Ｔなる条件で余剰液を除去す
ることが必要である。この条件で絞液した後直ち
に非溶媒中に浸漬して凝固させてもよいし、更に
この上に銀面層となるポリウレタンエラストマー
溶液を塗布積層した後非溶媒中に浸漬してもよ
い。 Pigments, ultraviolet absorbers, antioxidants, surfactants, softeners, plasticizers, antifungal agents, cell conditioners, antifoaming agents, leveling agents, and the like are added to this polyurethane elastomer as necessary. Most preferably, the water-miscible organic solvent used is dimethyl formamide. After impregnating and filling a solution of polyurethane elastomer in a water-miscible organic solvent into the voids of the tangled short fibers in which the fibers are fixed with polyvinyl alcohol, the excess liquid is passed between a pair of driven rolls with a certain gap to apply a certain amount. However, at this time, the gap between the drive rolls is 0.2mm relative to the thickness of the short fiber tangled body in which the fibers are fixed with polyvinyl alcohol.
If it is thinner than this, it is difficult to obtain a base material for artificial leather that is rich in smoothness. Therefore, the thickness of the tangled short fibers after slicing is t o (mm), and the squeezing gap of the drive roll is T (mm).
Then, it is necessary to remove the excess liquid under the condition that t o −0.2≦T. After squeezing under these conditions, it may be immediately immersed in a non-solvent to solidify it, or it may be further coated with a polyurethane elastomer solution to form a silver surface layer and then immersed in a non-solvent.
（実施例）
以下に実施例を示して、本発明をさらに説明す
るが下記の実施例は本発明を制限するためのもの
ではない。(Example) The present invention will be further explained with reference to Examples below, but the following Examples are not intended to limit the present invention.
実施例 １
６ナイロン1.5デニール、繊維長51mm70％、６
ナイロン３デニール繊維長38mm30％より成る短繊
維交絡体（200ｇ／m2）に重合度550、ケン化度
96.5％のポリビニルアルコールの８％水溶液を含
浸し繊維に対して150％になるように絞液した後、
140℃で乾燥し、繊維相互を固定した。次いで厚
味調整のため、155℃の表面温度を有する上下駆
動の熱ロール間を通過させ、1.3mm厚の不織布を
得た。次いでこれをスライスマシンによりスライ
スし、1.1mmの片面が極めて平滑性に富む不織布
を得た。次いで100％モジユラス57Kg／cm2、抗張
力684Kg／cm2、破断時伸度518％のポリウレタンエ
ラストマーの19.5％ジメチルフオルムアミド溶液
に含浸し、余剰液を除去するために1.0mmの間隙
を有する一対の上下駆動のロール間を通過させ、
直ちに20℃の水中へ浸漬し、ポリウレタンエラス
トマーを凝固させた。このものは極めて表面平滑
性に富み人工皮革用基材として優れていた。この
基材上に0.3mm厚の銀面層を設けたところ極めて
表面平滑性と充実感に富む人工皮革が得られた。Example 1 6 Nylon 1.5 denier, fiber length 51mm 70%, 6
A short fiber entangled body (200 g/m 2 ) consisting of nylon 3 denier fiber length 38 mm 30% with a polymerization degree of 550 and a saponification degree
After impregnating the fiber with an 8% aqueous solution of 96.5% polyvinyl alcohol and squeezing the solution to 150%,
It was dried at 140°C to fix the fibers together. Next, in order to adjust the thickness, the nonwoven fabric was passed between vertically driven heat rollers having a surface temperature of 155°C to obtain a nonwoven fabric with a thickness of 1.3 mm. This was then sliced using a slicing machine to obtain a 1.1 mm nonwoven fabric with extremely smooth one side. A polyurethane elastomer with a 100% modulus of 57 Kg/cm 2 , a tensile strength of 684 Kg/cm 2 and an elongation at break of 518% was then impregnated with a 19.5% dimethylformamide solution, and a pair of polyurethane elastomers with a gap of 1.0 mm were prepared to remove excess liquid. Pass it between vertically driven rolls,
The polyurethane elastomer was immediately immersed in water at 20°C to coagulate. This material had extremely smooth surface and was excellent as a base material for artificial leather. When a 0.3 mm thick grain layer was formed on this base material, artificial leather with extremely smooth surface and rich feeling was obtained.
実施例 ２
６ナイロン1.2デニール、繊維長63mm70％、6.6
ナイロン0.8デニール、繊維長38mm30％より成る
短繊維交絡体（160ｇ／m2）に重合度1750、ケン
化度98.3％のポリビニルアルコールの５％水溶液
を含浸し、繊維に対して160％になるように絞液
したのちポリテトラフルオロエチレンで被覆した
熱ロールに沿わせて乾燥させ1.1mmの厚味を有す
る不織布を得たのち、0.9mmにスライスマシンで
片面を除去し平滑な面を得た。次いで、実施例１
で使用したポリウレタンエラストマー溶液に含浸
し、0.85mmのロール間間隙を有する上下駆動のロ
ール間を通過させ20℃の水中で凝固させた。この
ものも実施例１同様に極めて平滑性に富む人工皮
革用基材であつた。Example 2 6 Nylon 1.2 denier, fiber length 63mm 70%, 6.6
A short fiber entangled body (160 g/m 2 ) consisting of nylon 0.8 denier, fiber length 38 mm, 30% was impregnated with a 5% aqueous solution of polyvinyl alcohol with a degree of polymerization of 1750 and a degree of saponification of 98.3%, so that the fiber was 160% After squeezing the liquid, it was dried along a heated roll coated with polytetrafluoroethylene to obtain a nonwoven fabric with a thickness of 1.1 mm, and one side was removed using a slicing machine to obtain a smooth surface of 0.9 mm. Next, Example 1
It was impregnated with the polyurethane elastomer solution used in 2007, passed between vertically driven rolls with a roll gap of 0.85 mm, and coagulated in water at 20°C. Similar to Example 1, this material was also an extremely smooth substrate for artificial leather.
比較例 １
実施例１で使用した短繊維交絡体をスライス加
工せずにポリウレタンエラストマー溶液に含浸
し、絞液間隙1.2mmで絞液した後20℃の水中でポ
リウレタンエラストマーを凝固させたが、実施例
１で得られたような平滑な表面は得られなかつ
た。Comparative Example 1 The short fiber entangled body used in Example 1 was impregnated with a polyurethane elastomer solution without slicing, and after squeezing the liquid with a squeezing gap of 1.2 mm, the polyurethane elastomer was coagulated in water at 20°C. A smooth surface as obtained in Example 1 was not obtained.
比較例 ２
実施例１にて使用したスライス後1.1mmの片面
平滑な不織布を、やはり実施例１にて使用したポ
リウレタンエラストマー溶液に含浸させた後絞液
する時に、間隙0.8mmのニツプロール間を通過さ
せて得た人工皮革基材は、樹脂の充填量が少なく
充実感に欠けるばかりでなく、銀面層をこの上に
0.4mm厚で形成しても不織布層の平滑性不足によ
つて、実施例１のものよりは、平滑性の点で劣る
ものであつた。Comparative Example 2 The single-sided smooth nonwoven fabric of 1.1 mm after slicing used in Example 1 was impregnated with the polyurethane elastomer solution also used in Example 1, and when squeezed, it passed between nip rolls with a gap of 0.8 mm. The artificial leather base material obtained by this process not only lacks a sense of fulfillment due to the small amount of resin filled, but also has a grain layer on top of it.
Even when formed with a thickness of 0.4 mm, the smoothness was inferior to that of Example 1 due to the lack of smoothness of the nonwoven fabric layer.
Claims (1)
ニルアルコール水溶液を含浸し、乾燥して短繊維
相互を固定した後、片面をスライスマシンにより
除去し、次いでポリウレタンエラストマーの水混
和性有機溶剤溶液を含浸した後、to−0.2≦Ｔmm
（to：スライス後の短繊維交絡体の厚み、Ｔ：絞
液クリアランス）なる条件を満足する絞液クリア
ランスで絞液し、次いで非溶媒中に浸漬してポリ
ウレタンエラストマーを微細な多孔質体として凝
固させ、しかるのち、ポリビニルアルコールを溶
解除去することを特徴とする人工皮革の製造方
法。1 A short fiber entangled body made of thermoplastic fibers was impregnated with an aqueous polyvinyl alcohol solution, dried to fix the short fibers to each other, one side was removed using a slicing machine, and then impregnated with a water-miscible organic solvent solution of polyurethane elastomer. After, t o −0.2≦Tmm
The polyurethane elastomer is squeezed with a squeezing clearance that satisfies the following conditions: (t o : thickness of short fiber entangled body after slicing, T: squeezing liquid clearance), and then immersed in a non-solvent to form a polyurethane elastomer into a fine porous body. A method for producing artificial leather, which comprises coagulating it and then dissolving and removing polyvinyl alcohol.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17090685A JPS6233885A (en) | 1985-08-02 | 1985-08-02 | Production of artificial leather having improved surface smoothness |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17090685A JPS6233885A (en) | 1985-08-02 | 1985-08-02 | Production of artificial leather having improved surface smoothness |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6233885A JPS6233885A (en) | 1987-02-13 |
| JPH0457789B2 true JPH0457789B2 (en) | 1992-09-14 |
Family
ID=15913524
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17090685A Granted JPS6233885A (en) | 1985-08-02 | 1985-08-02 | Production of artificial leather having improved surface smoothness |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6233885A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002030579A (en) * | 2000-07-17 | 2002-01-31 | Toray Ind Inc | Napped leather-like sheet-like material and method for producing the same |
| JP5958060B2 (en) * | 2012-05-10 | 2016-07-27 | 東レ株式会社 | Sheet material and method for producing the same |
| EP2896741B1 (en) * | 2012-09-14 | 2019-08-07 | Toray Industries, Inc. | Process for manufacturing a leather-like nonwoven fabric |
-
1985
- 1985-08-02 JP JP17090685A patent/JPS6233885A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6233885A (en) | 1987-02-13 |
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