JPS63112776A - Production of artificial leather - Google Patents
Production of artificial leatherInfo
- Publication number
- JPS63112776A JPS63112776A JP25406786A JP25406786A JPS63112776A JP S63112776 A JPS63112776 A JP S63112776A JP 25406786 A JP25406786 A JP 25406786A JP 25406786 A JP25406786 A JP 25406786A JP S63112776 A JPS63112776 A JP S63112776A
- Authority
- JP
- Japan
- Prior art keywords
- artificial leather
- base material
- contact
- solvent
- polyurethane elastomer
- 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
- 239000002649 leather substitute Substances 0.000 title claims abstract description 50
- 238000004519 manufacturing process Methods 0.000 title claims description 12
- 239000000835 fiber Substances 0.000 claims abstract description 53
- 238000010438 heat treatment Methods 0.000 claims abstract description 40
- 238000001816 cooling Methods 0.000 claims abstract description 31
- 229920003225 polyurethane elastomer Polymers 0.000 claims abstract description 26
- 239000003960 organic solvent Substances 0.000 claims abstract description 10
- 239000004677 Nylon Substances 0.000 claims abstract description 9
- 229920001778 nylon Polymers 0.000 claims abstract description 9
- 239000000463 material Substances 0.000 claims description 36
- 239000002904 solvent Substances 0.000 claims description 22
- 238000001704 evaporation Methods 0.000 claims description 3
- 229910052721 tungsten Inorganic materials 0.000 claims description 3
- 238000007654 immersion Methods 0.000 claims description 2
- 239000010985 leather Substances 0.000 abstract description 13
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 abstract description 12
- 229920002635 polyurethane Polymers 0.000 abstract description 7
- 239000004814 polyurethane Substances 0.000 abstract description 7
- 230000001112 coagulating effect Effects 0.000 abstract description 3
- 238000003825 pressing Methods 0.000 abstract description 2
- 239000000758 substrate Substances 0.000 abstract 5
- 206010016322 Feeling abnormal Diseases 0.000 abstract 1
- 229920001971 elastomer Polymers 0.000 abstract 1
- 239000000806 elastomer Substances 0.000 abstract 1
- 239000002657 fibrous material Substances 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 10
- 239000004745 nonwoven fabric Substances 0.000 description 8
- 229920000728 polyester Polymers 0.000 description 7
- -1 finenesses Substances 0.000 description 6
- 239000010410 layer Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 3
- 239000004372 Polyvinyl alcohol Substances 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 229920002451 polyvinyl alcohol Polymers 0.000 description 3
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 2
- 239000004952 Polyamide Substances 0.000 description 2
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 229920002647 polyamide Polymers 0.000 description 2
- 238000004080 punching Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 238000007711 solidification Methods 0.000 description 2
- 230000008023 solidification Effects 0.000 description 2
- RYHBNJHYFVUHQT-UHFFFAOYSA-N 1,4-Dioxane Chemical compound C1COCCO1 RYHBNJHYFVUHQT-UHFFFAOYSA-N 0.000 description 1
- UPMLOUAZCHDJJD-UHFFFAOYSA-N 4,4'-Diphenylmethane Diisocyanate Chemical compound C1=CC(N=C=O)=CC=C1CC1=CC=C(N=C=O)C=C1 UPMLOUAZCHDJJD-UHFFFAOYSA-N 0.000 description 1
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 1
- 235000017491 Bambusa tulda Nutrition 0.000 description 1
- 241001330002 Bambuseae Species 0.000 description 1
- 239000005057 Hexamethylene diisocyanate Substances 0.000 description 1
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 1
- 239000006096 absorbing agent Substances 0.000 description 1
- 239000002518 antifoaming agent Substances 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- 239000003125 aqueous solvent Substances 0.000 description 1
- 239000011425 bamboo Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 125000005442 diisocyanate group Chemical group 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 239000000417 fungicide Substances 0.000 description 1
- RRAMGCGOFNQTLD-UHFFFAOYSA-N hexamethylene diisocyanate Chemical compound O=C=NCCCCCCN=C=O RRAMGCGOFNQTLD-UHFFFAOYSA-N 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 230000002209 hydrophobic effect Effects 0.000 description 1
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 1
- 239000003112 inhibitor Substances 0.000 description 1
- 239000012948 isocyanate Substances 0.000 description 1
- 150000002513 isocyanates Chemical class 0.000 description 1
- 210000003127 knee Anatomy 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 235000014593 oils and fats Nutrition 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 229920001610 polycaprolactone Polymers 0.000 description 1
- 239000004632 polycaprolactone Substances 0.000 description 1
- 229920000921 polyethylene adipate Polymers 0.000 description 1
- 229920005862 polyol Polymers 0.000 description 1
- 150000003077 polyols Chemical class 0.000 description 1
- 229920001451 polypropylene glycol Polymers 0.000 description 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
- 239000004810 polytetrafluoroethylene Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000009987 spinning Methods 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 1
- DVKJHBMWWAPEIU-UHFFFAOYSA-N toluene 2,4-diisocyanate Chemical compound CC1=CC=C(N=C=O)C=C1N=C=O DVKJHBMWWAPEIU-UHFFFAOYSA-N 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Landscapes
- Synthetic Leather, Interior Materials Or Flexible Sheet Materials (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は片面側に緻密できわめて平滑性に優れた表面が
形成され、天然皮革様の柔軟な風合を有する人工皮革を
提供することのできる人工皮革の製造方法に関する。[Detailed Description of the Invention] [Industrial Application Field] The present invention aims to provide artificial leather having a dense and extremely smooth surface formed on one side and having a soft texture similar to natural leather. This article relates to a method for producing artificial leather.
〔従来の技術及び発明が解決しようとする問題点〕従来
よ）人工皮革として短繊維交絡体の空隙部にポリウレタ
ンニジストマーの水混和性有機溶媒溶液を含浸させ１後
、水を主成分とする非溶媒中に浸漬してポリウレタンエ
ラストマーを凝固させていわゆる不織布とし、次いでこ
の不織布の片面にポリウレタンエラストマーの水混和性
有機溶媒溶液を塗布した後、非溶媒中でポリウレタンエ
ラス）−ｒ−を凝固させてミクロポーラス層を形成して
得られたものが用いられているが、従来の人工皮革は外
観の平滑性を付与するために不織布のミクロポーラス層
形成面側に漉き加工を施して平滑面を形成した後にミク
ロポーラス層を形成する方法が採用されている。[Prior Art and Problems to be Solved by the Invention] Conventional) Artificial leather is made by impregnating the voids of a short fiber tangled body with a water-miscible organic solvent solution of polyurethane disstomer, and then converting it to water as the main component. The polyurethane elastomer is coagulated by immersion in a non-solvent to form a so-called non-woven fabric, and then a solution of the polyurethane elastomer in a water-miscible organic solvent is applied to one side of the non-woven fabric, and then the polyurethane elastomer)-r- is coagulated in the non-solvent. However, in conventional artificial leather, in order to give a smooth appearance, the surface of the nonwoven fabric on which the microporous layer is formed is skived to create a smooth surface. A method is adopted in which a microporous layer is formed after the formation.
しかしながら平滑面を形成するために不織布に漉き加工
を施すとミクロポーラス層表面の平滑性をよシ高めるこ
とができる反面、相互に交絡しあって不織布を構成して
いる繊維を切断してしまうために不織布の強度が低下し
ていわゆる腰の弱い人工皮革となるとともに、不織布の
漉き加工面にミクロポー２ス層を形成した場合にはミク
ロポーラス層と不織布との接合強度に問題があシ、靴胛
材として用いた場合、表面に擦シ傷が付いたシ、表面が
剥離し易いという問題があった。However, if the nonwoven fabric is skived to form a smooth surface, the smoothness of the surface of the microporous layer can be improved, but on the other hand, the fibers that are intertwined with each other and make up the nonwoven fabric will be cut. In addition, the strength of the nonwoven fabric decreases, resulting in what is called a weak artificial leather, and if a microporous layer is formed on the skimmed surface of the nonwoven fabric, there is a problem with the bonding strength between the microporous layer and the nonwoven fabric. When used as a bamboo material, there were problems such as scratches on the surface and easy peeling of the surface.
本発明は上記の点に鑑みなされたもので優れた平滑表面
を有し、天然皮革様の風合に富んだ人工皮革の製造方法
を提供することを目的とする。The present invention has been made in view of the above points, and an object of the present invention is to provide a method for producing artificial leather having an excellent smooth surface and rich in natural leather-like texture.
即ち本発明は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媒溶液を含浸せしめ１後、水
性非溶媒中に浸漬してポリウレタンエラストマーを凝固
せしめて人工皮革用基材を得、次いで該基材中に前記非
溶媒が残存する状態で基材の片面を加熱体表間に接触さ
せ、信置を冷却体表面に接触させ、かつ加熱体と冷却体
とによって挟圧して加熱体表面と接触させた側の表面付
近の非溶媒を蒸発除去して緻密で平滑な表面を形成する
ことを特徴とする人工皮革の製造方法を要旨とする。That is, the present invention impregnates the voids of a short fiber entangled body with a water-miscible organic solvent solution of a polyurethane elastomer, and then immerses it in an aqueous non-solvent to coagulate the polyurethane elastomer to obtain a base material for artificial leather. With the non-solvent remaining in the base material, one side of the base material is brought into contact with the surface of the heating body, the trust is brought into contact with the surface of the cooling body, and the heating body is pressed between the heating body and the cooling body to cool the surface of the heating body. The gist of the present invention is a method for producing artificial leather, which is characterized by forming a dense and smooth surface by evaporating and removing the non-solvent near the surface that is in contact with the leather.
本発明において短繊維交絡体としては、ポリエステル短
繊維、ポリアミド短繊維よ〕なるものが好ましく、ポリ
エステル短繊維は熱収縮性を有するものが、表面平滑性
向上の上で好ましい。またポリアミド短繊維としては６
−ナイロン、６ローナイロン等が用いられるが、柔軟性
の点で６−ナイロンが好ましく、特に短繊維交絡体とし
ては、６−ナイロンを５０％以上含有するものが好まし
い。上記短繊維は、紡出の容易さ、単糸強度、交絡強度
、人工皮革としての表面の平滑性、柔軟性、風合等を総
合的に考慮すると、繊度０．５〜２．０デニールのもの
が好ましく、皮革を靴胛材として使用する場合１ζはＬ
Ｏデニール以上のものが好ましい。また短繊維の繊維長
が短かすぎると人工皮革の伸びが少なくなって引裂強度
が低下し、逆に長すぎると表頁平滑性低下をきたしやす
いため、３０〜７０絽のものが好ましく、特に３５〜６
５冨凰のものが好ましい。短繊維は材質、繊度、繊維長
の異なるものを混合して用いることができる。In the present invention, the tangled short fibers are preferably polyester short fibers or polyamide short fibers, and the polyester short fibers are preferably heat-shrinkable in terms of improving surface smoothness. In addition, as polyamide staple fiber, 6
- Nylon, 6-row nylon, etc. are used, but 6-nylon is preferred from the viewpoint of flexibility, and especially as short fiber entangled material, one containing 50% or more of 6-nylon is preferred. The short fibers mentioned above have a fineness of 0.5 to 2.0 denier, considering the ease of spinning, single yarn strength, interlacing strength, surface smoothness as artificial leather, flexibility, texture, etc. If leather is used as shoelace material, 1ζ is L.
A denier of O denier or more is preferred. Also, if the fiber length of the short fibers is too short, the elongation of the artificial leather will be reduced and the tear strength will be lowered, and if it is too long, the surface smoothness will tend to decrease. 35-6
Preferably, the one with a diameter of 5 tungsten. Short fibers having different materials, finenesses, and fiber lengths can be mixed and used.
短繊維交絡体は上記短繊維をニードルパンチングするこ
とにより得られるが、繊維配列方向、繊維混合比率、ニ
ードルパンチングの針密度、繊維密度、繊維の密度勾配
等は使用目的に応じて決定する必要がある。また短繊維
交絡体にポリウレタンニジストマーを含浸、凝固させる
工程での寸法安定性を保持するために、ポリビニルアル
コール、メチルセルロマス等の公知の水溶性糊剤にょシ
短繊維交絡体中の繊維相互を固着しておくことが好まし
い。水溶性糊剤の短繊維交絡体への付着量は３〜５０％
程度が好ましく、繊維組成、繊度等に応じて決定される
。The short fiber entangled body can be obtained by needle punching the above short fibers, but the fiber arrangement direction, fiber mixing ratio, needle density of needle punching, fiber density, fiber density gradient, etc. need to be determined depending on the purpose of use. be. In addition, in order to maintain dimensional stability during the process of impregnating and coagulating the polyurethane distomer into the tangled short fibers, known water-soluble glues such as polyvinyl alcohol and methylcellulomas are used to bond the fibers in the tangled short fibers together. It is preferable to keep it fixed. The amount of water-soluble glue attached to the short fiber entanglement is 3 to 50%.
The degree is preferable and is determined depending on the fiber composition, fineness, etc.
上記短繊維交絡体の空隙部に充填されるポリウレタンエ
ラストマーは、人工皮革用に用いられているものであれ
ば使用できるが、表面平滑性、柔軟性、屈曲性、凝固速
度等を考慮すると高分子量のものが好ましい。ポリウレ
タンエラストマーのポリオール成分としては、ポリテト
ラメチレングリコール、ポリプロピレングリコール等の
ボリエ＋ ７− ル／ リコール類、ポリエチレンアジ
ペート、ポリブチレンアジペート、ポリエチレンブチレ
ンアジベート、ポリカプロラクトン等のポリエステル類
等が用いられる。またインシアネート成分としてｉ、４
．４’−ジフェニルメタンジイソシアネート、トリレン
ジイソシアネート、インホロンジイソシアネート、４
、４’−ジアミノジシクロヘキシルメタンジイソシアネ
ート、ヘキサメチレンジイソシアネート等が用いられる
が、湿式凝固速度、熱軟化点、湿式成膜性、湿式セル形
状、抗張力、柔軟性の点で４．４′−ジフェニルメタン
ジイソシアネートが特に好ましい。ポリウレタンニジス
トマーは熱軟化点が低すぎると乾燥工程で基材の厚み低
下を生じたシ、風合の低下（硬質化）を生じやすく、ま
た熱軟化点が高すぎると後述する加熱体と冷却体とに接
触せしめて挟圧しても平滑面が得られ難いため、用いる
ポリウレタンエラス）ｗ−の熱軟化点は１７０〜２００
℃が好ましい。ポリウレタンニジストマーはポリエステ
ル成分、イソシアネート成分、熱軟化点等の異なるもの
を２種以上混合して用いることもできる。The polyurethane elastomer to be filled in the voids of the above-mentioned tangled short fibers can be used as long as it is used for artificial leather, but considering surface smoothness, flexibility, flexibility, solidification speed, etc., it has a high molecular weight. Preferably. As the polyol component of the polyurethane elastomer, polyesters such as polytetramethylene glycol and polypropylene glycol, polyesters such as polyethylene adipate, polybutylene adipate, polyethylene butylene adipate, and polycaprolactone are used. In addition, i, 4 as an incyanate component
．． 4'-diphenylmethane diisocyanate, tolylene diisocyanate, inphorone diisocyanate, 4
, 4'-diaminodicyclohexylmethane diisocyanate, hexamethylene diisocyanate, etc. are used, but 4,4'-diphenylmethane diisocyanate is preferred in terms of wet solidification rate, thermal softening point, wet film formability, wet cell shape, tensile strength, and flexibility. Particularly preferred. If the heat softening point of polyurethane nystomer is too low, the thickness of the base material may decrease during the drying process, and the texture may deteriorate (hardening).If the heat softening point is too high, the heating element and cooling Since it is difficult to obtain a smooth surface even if it is brought into contact with the body and pressed, the heat softening point of the polyurethane elastomer (w) used is 170 to 200.
°C is preferred. The polyurethane disstomer can also be used by mixing two or more types of polyester components, isocyanate components, and those having different thermal softening points.
ポリウレタンエラストマーを溶解するための水混和性有
機溶媒としてはジメチルフォルムアミド、テトラヒドロ
フラン、アセトン、ジオキサン等が挙げられるが、特に
ジメチルフォルムアミドが好ましい。ポリウレタンエラ
ストマーの水混和性有機溶媒溶液は、粘度があまシ低い
と短繊維交絡体の空隙部に均一に含浸され難く、微多孔
構造を形成しにくい。更ｌど加熱体と冷却体とによりて
挟圧した後に緻密な表面層が形成され難いため表面平滑
性に乏しくなるので、２０℃において１０００ＣＰＳ以
上の粘度を有することが好ましい。ポリウレタンエラス
トマー溶液の濃度は特に限定されないが、１０〜２５％
が好ましく、特に１５〜２０％が好ましい。また短繊維
交絡体に対するポリウレタンエラストマーの含浸量は５
０〜２００％、特１ζ７０〜１５０％が好ましい。Examples of water-miscible organic solvents for dissolving the polyurethane elastomer include dimethylformamide, tetrahydrofuran, acetone, and dioxane, with dimethylformamide being particularly preferred. If the viscosity of the water-miscible organic solvent solution of the polyurethane elastomer is too low, it will be difficult to uniformly impregnate the voids of the tangled short fibers, making it difficult to form a microporous structure. Furthermore, it is difficult to form a dense surface layer after pressing with a heating body and a cooling body, resulting in poor surface smoothness, so it is preferable to have a viscosity of 1000 CPS or more at 20°C. The concentration of the polyurethane elastomer solution is not particularly limited, but is 10 to 25%.
is preferable, particularly preferably 15 to 20%. In addition, the amount of polyurethane elastomer impregnated into the short fiber entangled body was 5
0 to 200%, particularly 1ζ 70 to 150% is preferable.
ポリウレタンエラストマーの水混和性有機溶媒溶液を空
隙部に充填した短繊維交絡体を水性非溶媒中に浸漬して
ポリウレタンエラストマー溶液固させる際の凝固速度調
整、セル径調整のためにポリウレタンニジストマーの有
機溶媒溶液中に界面活性剤、各種油脂、疎水性溶媒を添
加しておくことができ、更に必要に応じて抗酸化剤、紫
外線吸収剤、加水分解防止剤、消泡剤、防かび剤、顔料
等を添加することもできる。上記水性非溶媒とはポリウ
レタンエラストマーは溶解しないが、前記水混和性有機
溶媒は溶解する水性溶媒であシ、水又は水を主成分とす
る溶媒が用いられる。A short fiber entangled body whose voids are filled with a water-miscible organic solvent solution of a polyurethane elastomer is immersed in an aqueous non-solvent to solidify the polyurethane elastomer solution. Surfactants, various oils and fats, and hydrophobic solvents can be added to the solvent solution, and if necessary, antioxidants, ultraviolet absorbers, hydrolysis inhibitors, antifoaming agents, fungicides, and pigments can be added. etc. can also be added. The above-mentioned aqueous non-solvent is an aqueous solvent in which the polyurethane elastomer is not dissolved, but the water-miscible organic solvent is soluble, and water or a solvent having water as a main component is used.
非溶媒中に浸漬してポリウレタンニジストマーを凝固せ
しめて得られる人工皮革用基材は、次いで非溶媒が残存
する状態で一方の面を加熱体に接触せしめ、他方の面を
冷却体に接触せしめるとともに、加熱体と冷却体とによ
って挟圧するが、この際の人工皮革用基材中の非溶媒の
残存量は少なすぎて屯多すぎても充分な平滑性向上効果
が得られ難いため、人ニー皮革用基材の乾燥重量の３０
〜１５０％程度が好ましく、特に５０〜１２０％が好ま
しい。加熱体、冷却体としては板状のもの（加熱板や冷
却板）、ロール状のもの（加熱ロールや冷却ロール）が
用いられるが、通常は加熱ロールと冷却ロールが用いら
れる。非溶媒の残存する人工皮革用基材を挟圧する際の
加熱体の表面温度は短繊維交絡体を構成する短繊維の熱
軟化点−５０℃以上、熱軟化点以下の温度が好ましく、
冷却体の表面温度は室温以下、５℃以上の温度、特に人
工皮革用基材の温度以下、５℃以上の温度が好ましい。The base material for artificial leather obtained by coagulating the polyurethane distomer by immersing it in a non-solvent is then brought into contact with a heating element on one side and a cooling element on the other side with the non-solvent remaining. At the same time, pressure is applied using a heating element and a cooling element, but the amount of non-solvent remaining in the base material for artificial leather at this time is too small, and even if there is too much, it is difficult to obtain a sufficient smoothness improvement effect. 30 of the dry weight of the base material for knee leather
About 150% is preferable, and 50 to 120% is particularly preferable. As the heating body and the cooling body, plate-shaped bodies (heating plates and cooling plates) and roll-shaped bodies (heating rolls and cooling rolls) are used, but usually heating rolls and cooling rolls are used. The surface temperature of the heating body when compressing the artificial leather base material in which the non-solvent remains is preferably a temperature not less than -50°C and not more than the heat softening point of the short fibers constituting the short fiber entangled body,
The surface temperature of the cooling body is preferably below room temperature and above 5°C, particularly below the temperature of the base material for artificial leather and above 5°C.
加熱体と冷却体とで非溶媒の残存する人工皮革用基材を
挟圧する際の加熱体と冷却体との間のクリアランス（ｎ
）は、クリアランスの値をＣＬ、人工皮革用基材の乾燥
時の重量１／ゼンの値をＷとしたとき、Ｗ／１０００≦
ＣＬ≦２Ｗ／１０００であることが好ましい。このよう
に非溶媒が残存している状態の人工皮革用基材の一方の
面を加熱し、他方の面を冷却しながら加熱体と冷却体と
で狭圧することによって、加熱体と接触せしめた側は、
表面付近の非溶媒が蒸発除去されて緻密で平滑な表面が
形成され、かつ全体としての柔軟性を有する天然皮革様
の風合の人工皮革が得られるものであ）、加熱体と接触
させた面と反対側の面を冷却体に接触させないと全体が
つぶれて肉薄となって柔軟な風合が得られず、また一方
の面を加熱体に接触させ、他方の面を冷却体に接触させ
ても、加熱体と冷却体とで狭圧しない場合には緻密で平
渭な表面が形成されない。また加熱体と冷却体とで狭圧
する際の人工皮革用基材の温度は、表面から裏面への密
度勾配がより天然皮革様の人工皮革を得るために、室温
以下であることが好ましい。The clearance between the heating body and the cooling body (n
) is W/1000≦, where CL is the clearance value and W is the dry weight 1/zen of the base material for artificial leather.
It is preferable that CL≦2W/1000. In this way, one side of the artificial leather base material in which the non-solvent remains is heated, and the other side is cooled while being compressed between a heating element and a cooling element to bring it into contact with the heating element. The side is
The non-solvent near the surface is removed by evaporation to form a dense and smooth surface, and an artificial leather with a texture similar to natural leather with overall flexibility is obtained), and is brought into contact with a heating element. If the opposite side is not in contact with the cooling element, the entire surface will be crushed and the wall will become thin, and a soft texture will not be obtained. However, if there is no narrow pressure between the heating body and the cooling body, a dense and flat surface will not be formed. Further, the temperature of the artificial leather base material when compressed by the heating body and the cooling body is preferably below room temperature in order to obtain artificial leather with a density gradient from the front surface to the back surface that is more similar to natural leather.
、声：発明方法により得られる人工皮革は、そのままで
靴胛材用原料として用いることができるが、必要に応じ
て加熱体と接触せしめて平滑とした面側にポリウレタン
ニジストマー表皮層を転写形成して用いることもできる
。, Voice: The artificial leather obtained by the method of the invention can be used as it is as a raw material for shoe laces, but if necessary, it can be brought into contact with a heating element to transfer and form a polyurethane nystomer skin layer on the smooth surface side. It can also be used as
以下実施例を挙げて本発明を更に詳細に説明する。 EXAMPLES The present invention will be explained in more detail with reference to Examples below.
実施例１
繊度１．５デニール、繊維長５１）１ｍの６−ナイロン
短繊維７０％と、繊度１．２デニール、繊維長６３簡の
６−ナイロン短繊維３０％とからなる短繊維交絡体（坪
量２２０，９／ｍ’）に、ポリビニルアルコールを固形
分換算で短繊維交絡体の重量に対して７．５％となる量
を付着させた後、該短繊維交絡体を熱軟化点１９５℃、
１００％モジ瓢ラス６０ｋｇ／１０ｉのポリウレタンエ
ラストマーの１＆５％ジメチルフォルムアミド溶液（３
５００ＣＰＳ／２０Ｃ）中に浸漬して空隙部にポリウレ
タンエラストマー溶液を含浸せしめ、次いで１８℃の水
中に浸漬してポリウレタンエラストマーを凝固せしめ、
更に水で洗浄した後、ニップロールにて含水率が４１％
になるように絞った。この時の厚さは１．６ｎであった
。次いでこの水を含んだ人工皮革用基材を、１５５℃の
表面温度を有し、ポリテトラフルオロエチレンで表面被
覆された熱ロールと、冷却水によ）表面温度を１７℃に
保持した冷却ロールとの間を、両ロール間のクリアラン
スをα５ｔｍとして通過させて加熱ロールと接触した表
面側に緻密で平滑な表面を有し、しかも表面側から裏面
側へと天然皮革様の密度勾配を有し、柔軟な風合の厚さ
１３１）ｍ＋の人工皮革を得た。この人工皮革の繊維対
ポリウレタンエラストマーの重量比は１００対１）５で
あった。Example 1 A short fiber entangled body consisting of 70% 6-nylon staple fibers with a fineness of 1.5 denier and a fiber length of 51) and 30% of 6-nylon staple fibers with a fineness of 1.2 denier and a fiber length of 63 strands ( After attaching polyvinyl alcohol in an amount of 7.5% based on the weight of the short fiber entangled body in terms of solid content, the short fiber entangled body was heated to a heat softening point of 195. °C,
1 & 5% dimethyl formamide solution of polyurethane elastomer (3
500CPS/20C) to impregnate the voids with a polyurethane elastomer solution, then immerse in 18°C water to coagulate the polyurethane elastomer,
After further washing with water, the water content is 41% with nip rolls.
I narrowed it down to The thickness at this time was 1.6n. Next, this water-containing artificial leather base material was passed through a heating roll having a surface temperature of 155°C and whose surface was coated with polytetrafluoroethylene, and a cooling roll whose surface temperature was maintained at 17°C (using cooling water). The material is passed between the two rolls with a clearance of α5tm, and has a dense and smooth surface on the surface side in contact with the heating roll, and has a density gradient similar to natural leather from the front side to the back side. An artificial leather having a soft texture and a thickness of 131) m+ was obtained. The weight ratio of fiber to polyurethane elastomer in this artificial leather was 100:1)5.
実施例２
０．５デニール、３８鵡の６−ナイロン短繊維３０％、
１．５デニール、５１ｍの６一ナイＣＩ７短繊維４０％
、２０デニール、５１簡のポリエステル短繊維３０％よ
シなる短繊維交絡体（坪量１６５１／ｌ）にポリビニル
アルコールを固形分換算で短繊維交絡体の重量に対して
２５％となる量付着させ喪後、該短繊維交絡体の空隙部
に実施例１と同様のポリウレタンエラストマー溶液を含
浸させ、次いでポリウレタンエラストマーを凝固させた
後、ニップロールで絞って含水率３８％、厚さ１．１ｎ
の水を含有する人工皮革用基材を得た。次にこの人工皮
革用基材を、実施例１同様の加熱ロールと冷却ロール間
を、クリアランスＱ、３１ＪＩとして通過させ、片面に
緻密できわめて平渭な表面を有し、天然皮革様の密度勾
配、柔軟性を有する厚さα６鵡の人工皮革を得た。この
皮革の繊維対ポリウレタンエラストマーの重量比は１０
０対８ｏであった。Example 2 0.5 denier, 30% 6-nylon short fibers of 38 mm,
1.5 denier, 51m 61 Ny CI7 staple fiber 40%
, 20 denier, 51 short polyester staple fibers (basis weight 1651/l) made of 30% polyester staple fibers were coated with polyvinyl alcohol in an amount equivalent to 25% of the weight of the short fiber entangled body in terms of solid content. After mourning, the voids of the intertwined short fibers were impregnated with the same polyurethane elastomer solution as in Example 1, and then the polyurethane elastomer was coagulated and squeezed with nip rolls to give a moisture content of 38% and a thickness of 1.1 nm.
A base material for artificial leather containing water was obtained. Next, this base material for artificial leather was passed between a heating roll and a cooling roll similar to Example 1 with a clearance of Q and 31JI. An artificial leather having flexibility and a thickness of α6 was obtained. The weight ratio of fiber to polyurethane elastomer in this leather is 10.
The score was 0-8.
比較例１
実施例１と同様にして得た人工皮革用基材を乾燥して実
質的に水が残存しない状態とした後、実施例１と同一条
件で加熱ロールと冷却ロール間を通過させたところ、表
面の緻密さ平滑さが著しく劣っていた。Comparative Example 1 A base material for artificial leather obtained in the same manner as in Example 1 was dried to a state where substantially no water remained, and then passed between a heating roll and a cooling roll under the same conditions as in Example 1. However, the surface density and smoothness were significantly inferior.
比較例２
実施例１と同様にして装造し、含水率４１％とじ九人工
皮革用基材を、冷却ロールにかえて１５５℃の表面温度
を有する加熱ロールを用い、両面を加熱ロールに接触さ
せた他は実施例１と同様の条件でロール間を通過させた
ところ平滑な表面は形成され九が肉厚が薄くな）柔軟性
に乏しく、天然皮革様の風合を有するものではなかった
。Comparative Example 2 A base material for artificial leather prepared in the same manner as in Example 1 with a water content of 41% was brought into contact with the heating roll on both sides by using a heating roll with a surface temperature of 155°C instead of the cooling roll. When the material was passed between the rolls under the same conditions as in Example 1, a smooth surface was formed, but the material had poor flexibility (the wall thickness was thin) and did not have the texture of natural leather. .
以上説明したように本発明方法は、人工皮革用基材の片
面を加熱体に接触させて加熱し、他面を冷却体に接触さ
せて冷却するとともに、加熱体と冷却体とで挟圧するこ
と、更に上記の処理を人工皮革用基材中に非溶媒が残存
した状態で行なう方法を採用したことにより、加熱体に
接触させた側の表面は緻密できわめて平滑な面が形成さ
れるとともに、この表面から裏面側にかけての密度勾配
は天然皮革にきわめて似たものとなシ、更には優れた柔
軟性を有し、天然皮革様の風合を有する人工皮革を得る
ことができる。また本発明方法は、従来法のように漉き
加工によって平滑面を形成するものではないから、基材
中の交絡繊維切断による強度低下を生じる慮れかなく、
強度的にも優れたものとなる等、種々の効果を有するも
のである。As explained above, the method of the present invention involves heating one side of the base material for artificial leather by bringing it into contact with a heating body, cooling the other side by bringing it into contact with a cooling body, and compressing the base material between the heating body and the cooling body. Furthermore, by adopting a method in which the above-mentioned treatment is carried out with the non-solvent remaining in the base material for artificial leather, a dense and extremely smooth surface is formed on the side that is in contact with the heating element, and This density gradient from the front side to the back side is very similar to natural leather, and furthermore, it is possible to obtain artificial leather having excellent flexibility and a texture similar to natural leather. In addition, since the method of the present invention does not form a smooth surface by skiving as in the conventional method, it is inevitable that strength will be reduced due to cutting of entangled fibers in the base material.
It has various effects such as superior strength.
Claims (8)
ーの水混和性有機溶媒溶液を含浸せしめた後、水性非溶
媒中に浸漬してポリウレタンエラストマーを凝固せしめ
て人工皮革用基材を得、次いで該基材中に前記非溶媒が
残存する状態で基材の片面を加熱体表面に接触させ、他
面を冷却体表面に接触させ、かつ加熱体と冷却体とによ
って狭圧して加熱体表面と接触させた側の表面付近の非
溶媒を蒸発除去して緻密で平滑な表面を形成することを
特徴とする人工皮革の製造方法。(1) After impregnating the voids of the intertwined short fibers with a water-miscible organic solvent solution of polyurethane elastomer, the polyurethane elastomer is coagulated by immersion in an aqueous non-solvent to obtain a base material for artificial leather. With the non-solvent remaining in the base material, one side of the base material is brought into contact with the surface of the heating body, the other side is brought into contact with the surface of the cooling body, and the base material is compressed by the heating body and the cooling body and brought into contact with the surface of the heating body. A method for producing artificial leather, characterized by forming a dense and smooth surface by evaporating and removing a non-solvent near the surface on the side that has been rubbed.
る特許請求の範囲第１項記載の人工皮革の製造方法。(2) The method for producing artificial leather according to claim 1, wherein the intertwined short fibers contain 50% or more of 6-nylon.
２．０デニールである特許請求の範囲第１項又は第２項
記載の人工皮革の製造方法。(3) The fineness of the short fibers constituting the short fiber entangled body is 0.5 or more
The method for producing artificial leather according to claim 1 or 2, which has a denier of 2.0.
液の２０℃における粘度が１０００ＣＰＳ以上である特
許請求の範囲第１項〜第３項のいずれかに記載の人工皮
革の製造方法。(4) The method for producing artificial leather according to any one of claims 1 to 3, wherein the solution of the polyurethane elastomer in a water-miscible organic solvent has a viscosity of 1000 CPS or more at 20°C.
上、熱軟化点以下である特許請求の範囲第１項〜第４項
のいずれかに記載の人工皮革の製造方法。(5) The method for producing artificial leather according to any one of claims 1 to 4, wherein the surface temperature of the heating body is equal to or higher than the thermal softening point of the short fibers by 50°C and equal to or lower than the thermal softening point.
許請求の範囲第１項〜第５項のいずれかに記載の人工皮
革の製造方法。(6) The method for producing artificial leather according to any one of claims 1 to 5, wherein the surface temperature of the cooling body is below room temperature and above 5°C.
基材中の非溶媒の残存量が、人工皮革用基材の乾燥時の
重量に対して３０％〜１５０％である特許請求の範囲第
１項〜第６項のいずれかに記載の人工皮革の製造方法。(7) A patent claim in which the amount of non-solvent remaining in the base material for artificial leather when compressed by a heating body and a cooling body is 30% to 150% of the dry weight of the base material for artificial leather. The method for producing artificial leather according to any one of items 1 to 6.
体とによって狭圧する際の加熱体と冷却体との間のクリ
アランス（ｍｍ）の値：ＣＬが、人工皮革用基材の乾燥
時の重量（ｇ／ｍ＾２）の値をＷとするとき、Ｗ／１０
００≦ＣＬ≦２Ｗ／１０００である特許請求の範囲第１
項〜第７項のいずれかに記載の人工皮革の製造方法。(8) The value of the clearance (mm) between the heating body and the cooling body when the artificial leather base material containing a non-solvent is compressed by the heating body and the cooling body: CL is the value of the clearance (mm) of the artificial leather base material. When the value of dry weight (g/m^2) is W, W/10
Claim 1 where 00≦CL≦2W/1000
7. The method for producing artificial leather according to any one of items 7 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61254067A JPH0788628B2 (en) | 1986-10-25 | 1986-10-25 | Manufacturing method of artificial leather |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61254067A JPH0788628B2 (en) | 1986-10-25 | 1986-10-25 | Manufacturing method of artificial leather |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63112776A true JPS63112776A (en) | 1988-05-17 |
| JPH0788628B2 JPH0788628B2 (en) | 1995-09-27 |
Family
ID=17259759
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61254067A Expired - Lifetime JPH0788628B2 (en) | 1986-10-25 | 1986-10-25 | Manufacturing method of artificial leather |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0788628B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1303283C (en) * | 2004-02-13 | 2007-03-07 | 三芳化学工业股份有限公司 | Environmental protection product artificial leather and its manufacturing method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5287201A (en) * | 1976-01-09 | 1977-07-20 | Mitsubishi Rayon Co | Production of leather like sheet article |
| JPS60239573A (en) * | 1984-05-10 | 1985-11-28 | Achilles Corp | Production of leather-like substance |
-
1986
- 1986-10-25 JP JP61254067A patent/JPH0788628B2/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5287201A (en) * | 1976-01-09 | 1977-07-20 | Mitsubishi Rayon Co | Production of leather like sheet article |
| JPS60239573A (en) * | 1984-05-10 | 1985-11-28 | Achilles Corp | Production of leather-like substance |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1303283C (en) * | 2004-02-13 | 2007-03-07 | 三芳化学工业股份有限公司 | Environmental protection product artificial leather and its manufacturing method |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0788628B2 (en) | 1995-09-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP3187357B2 (en) | Leather-like sheet and method for producing the same | |
| US4515854A (en) | Entangled fibrous mat having good elasticity and methods for the production thereof | |
| US3871938A (en) | Process of making leather like sheet material | |
| JP4005364B2 (en) | Leather-like sheet and manufacturing method thereof | |
| JPWO2001057307A1 (en) | Leather-like sheet material and method for producing the same | |
| JP4116215B2 (en) | Leather-like sheet and method for producing the same | |
| JPS63112776A (en) | Production of artificial leather | |
| US4174414A (en) | Production of synthetic suede leather | |
| JPS61152859A (en) | Production of nonwoven fabric suitable for wipers | |
| JP3378153B2 (en) | Manufacturing method of artificial leather | |
| JPH101881A (en) | Leather-like sheet having silver surface and method for producing the same | |
| JP3361967B2 (en) | Non-woven fabric and artificial leather made of it | |
| KR100542506B1 (en) | 4-way high elastic polyurethane artificial leather and manufacturing method | |
| JP2902307B2 (en) | Artificial leather and manufacturing method thereof | |
| JPH07145569A (en) | Method for producing smooth leather-like sheet | |
| JP3015130B2 (en) | Method for producing a leather-like sheet having good surface smoothness | |
| JPH085148B2 (en) | Method of manufacturing artificial leather shoes | |
| US3725171A (en) | Process for the manufacture of synthetic leather material | |
| JPS6233885A (en) | Production of artificial leather having improved surface smoothness | |
| JPH06248578A (en) | Production of leather-like sheet | |
| JP2681889B2 (en) | Nonwoven fabric manufacturing method | |
| JPS59157383A (en) | Synthetic leather and production thereof | |
| JPS5927418B2 (en) | Greta suede | |
| JPH0545714B2 (en) | ||
| JPS6039488A (en) | Manufacture of artificial leather sheet |