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JP4194834B2 - Artificial leather - Google Patents
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JP4194834B2 - Artificial leather - Google Patents

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JP4194834B2
JP4194834B2 JP2002373734A JP2002373734A JP4194834B2 JP 4194834 B2 JP4194834 B2 JP 4194834B2 JP 2002373734 A JP2002373734 A JP 2002373734A JP 2002373734 A JP2002373734 A JP 2002373734A JP 4194834 B2 JP4194834 B2 JP 4194834B2
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Prior art keywords
artificial leather
section
nonwoven fabric
fibers
cross
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JP2004204381A (en
Inventor
靖之 林田
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Filwel
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Filwel
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Description

【0001】
【発明の属する技術分野】
本発明は、軽量化され、ソフトな風合いを有する人工皮革に関する。
【0002】
【従来の技術】
人工皮革は、ナイロン、ポリエステルの主として円形繊維を用いて三次元絡合された不織布とそれに担持されたポリウレタンなどの高分子弾性体からなる人工皮革基体で構成されている。
一般に、すぐれた表面感触、風合いの人工皮革を得るためには極細繊維を用いるのがよいとされているが、極細繊維は生産性が低くコストが高いため、分割性繊維からの割繊方法など極細繊維のつくり方について多くの検討がなされてきた(例えば特許文献1)。さらには、極細偏平断面繊維を高収縮紡績糸織編物に絡合させて、スエード調光沢感をより天然皮革のそれに近づけた立毛繊維シートを得ることも提案されている(例えば特許文献2)。
このように、従来、人工皮革についての改良は如何にしてより天然皮革に近いものにするか、そのような物性のものを如何に安価につくるか、という課題に向けられてきた。
一方で、人工皮革にはさまざまな用途があり、天然皮革により近づけることよりも、靴、スポーツシューズ、カバン、ランドセルなど軽量化の方が求められる用途も少なくない。
【0003】
【特許文献1】
特開平6−17360号公報
【特許文献2】
特開2001−96658号公報
【0004】
【発明が解決しようとする課題】
本発明は、軽量化され、ソフトな風合いを有し、かつ、安価に製造される人工皮革を提供することを目的とする。
【0005】
【課題を解決するための手段】
本発明者らは、上記の目的を達成するために、鋭意検討した結果、基布不織布製造の際、非極細の異型断面糸の短繊維を使用することにより、通常の円形繊維を使ったものよりも見掛け密度の低い、バルキーな三次元絡合不織布が形成され、このものから軽量で、ソフトな人工皮革がつくれることを見出し、本発明を完成した。
すなわち本発明は、繊維長が20〜150mmであり、繊度が0.5〜5.0デシテックスである異形断面短繊維を、構成短繊維中に少なくとも30重量%以上含有させて三次元絡合させた不織布を基布として使用した人工皮革を提供するものである。
好ましい態様において、異形断面短繊維は、繊維断面の長径/短径で表される偏平率Aが1.5≦A≦8.0である偏平断面短繊維である。
好ましい態様において、人工皮革は、前記基布としての不織布をポリウレタンエラストマー溶液に含浸し、次いで水性媒体中で湿式凝固せしめて得られたものである。
好ましい態様において、人工皮革は、前記基布としての不織布にポリビニルアルコールを固着せしめて、得られた前処理不織布をポリウレタンエラストマー溶液に含浸し、次いで水性媒体中で湿式凝固せしめて得られたものである。
好ましい態様において、人工皮革は、不織布が加熱収縮および繊維の割繊をせずに得られたものである。
【0006】
【発明の実施の形態】
本発明における基布不織布の製造に使用する異形断面短繊維は、繊維長が20〜150mmであり、繊度が0.5〜5.0デシテックスである非極細の異形断面短繊維であることを要し、このような非極細の異形断面短繊維を三次元絡合した不織布は、空隙率の大きい、嵩高いバルキーなものとなる。
【0007】
ここで異形断面とは、通常の円形断面でないことを言い、楕円形や矩形のような偏平断面のほか、例えば、図1に示すような三角形型、ドッグボーン型、十字型、三日月型など、あるいはそれらを押し潰した長い形状等の変形断面であってもよい。
【0008】
このような異形断面であるゆえに、通常の円形断面繊維に比して、不織布製造時、交絡点での繊維同士の接触度合がゆるく、空隙の多い疎な接触状態となり、かつ、非極細繊維ゆえに、その交絡状態が全体的に維持されて、空隙率の大きい三次元絡合状態の不織布が形成されるものと推定される。
【0009】
異形断面繊維であっても、繊度が0.5デシテックス以下の繊維、特に0.1デシテックス以下の極細繊維では不織布のバルキー化が実現しにくく、繊度が5.0デシテックス以上の太すぎる繊維では人工皮革としての風合いが出ない。すなわち本発明で使用する異形断面繊維は、非極細であって、人工皮革としたときに風合いが損なわれない程度の繊度(太さ)であることを要する。
さらに、非極細の異形断面繊維であっても、150mm以上の長繊維では、繊維間の三次元絡合が密には起こりにくくなって、不織布はバルキー性が出にくく、強度的にも難点があるものとなる。したがって、本発明の基布不織布のための異形断面繊維は、繊維長が20〜150mmの短繊維と呼ばれる領域のものが用いられなければならない。
【0010】
なお、このような非極細の異形断面短繊維の中でも、全体として偏平形状の断面を有するものであることが、不織布製造時、絡合繊維同士の接触度合がゆるくなり、空隙率の大きい三次元絡合が実現し易いため好ましい。
そのような偏平形状として、繊維断面の長径/短径で表される偏平率Aが1.5≦A≦8.0であることが好ましい。
【0011】
上記偏平形状の異形断面短繊維(以下、偏平断面短繊維という。)の偏平率Aが1.5未満の場合は、不織布のバルキー性が不足し、十分な軽量化、ソフト化が実現できず、偏平率Aが8.0を超える場合は、不織布化が極端に困難となり、不織布化できたとしても、人工皮革基布のための不織布として必要な品位(強度など)に到達し得ない恐れがある。
なお、ここで、偏平形状における偏平率Aとは、繊維断面の長径/短径で表される。長径とは、該繊維断面の最も長い部分の長さを言い、短径とは、該繊維断面内で長径とほぼ直交する方向のうち最も長い部分の長さを言う。
【0012】
本発明に使用される非極細異形断面短繊維は、常法により、ポリマー成分を、所望の当該異形断面形状の紡糸口金孔に導き紡糸し、ECカッター、ぐるぐるカッターなどでカッティングすること等によって得ることができる。
【0013】
また、本発明で使用される非極細異形断面短繊維は、ポリエステル、ポリアミド、ポリオレフィン、ポリアクリロニトリルなどのポリマーからつくることができ、なかでも寸法安定性の点から、ポリエステルが好ましく用いられる。
【0014】
本発明の基布不織布の製造は上記のような非極細異形断面短繊維を、該三次元絡合不織布中に好ましくは少なくとも30重量%以上、さらに好ましくは40重量%以上含有されているのが、前記課題を達成する上から好ましい。
【0015】
本発明の人工皮革用基布不織布の製造において、非極細異形断面短繊維と組み合わせて使用してもよい繊維としては、得られる人工皮革の物性および経済性の点から、通常汎用されているポリエステル、ナイロン等の円形断面の、短繊維が好ましく用いられる。
また、基布不織布は、本発明の目的を損なわない範囲内であれば、少量の羊毛、木綿、絹などの天然繊維やレーヨン、ポリアミド、アクリル、アセテート、ポリビニルなどの化学繊維や合成繊維を含むものであってもよい。
【0016】
本発明の人工皮革の好ましい製法の一例は次のようである。
非極細異形断面短繊維を含むポリエステル繊維をニードリング処理によって三次元絡合した基布不織布に、ポリビニルアルコールを固着せしめて前処理不織布を得る。次いで、ポリウレタンエラストマーの水混和性有機溶媒溶液に含浸し、余剰のポリウレタンエラストマー溶液を絞り取りした後、表面にポリウレタンエラストマー溶液を塗布し、これを水性媒体中で湿式凝固せしめ、水洗、乾燥して、皮革様シート状物を製造する。
【0017】
【実施例】
次に本発明を、実施例、比較例によって、さらに詳細に説明する。
なお、各種特性値の測定は以下の方法によった。
(厚み):
株式会社尾崎製作所製ピーコック厚み計モデルH(最小目盛0.01mm)により、それぞれの工程における厚み測定を行った。
(密度):
JIS K−6505に規定される方法に準拠して測定した。
(ガ−レ剛軟度):
JIS L−1079に規定される方法に準拠して測定した。数値が小さい程ソフトであることを示す。
【0018】
実施例1
繊維長が51mm、2.2デシテックスに相当する繊度であって、繊維断面の長径/短径で表される偏平率Aが4の楕円状のポリエステル偏平断面短繊維(ユニチカ社製、銘柄名F330)と、繊維長が51mm、2.2デシテックスの通常の円形断面短繊維(ユニチカ社製、E100)を混合率=50/50で混綿し、180g/mの目付けでニードリング処理して、厚み1.7mm、密度0.11の基布不織布を得た。
次に、ポリビニルアルコール(日本合成化学工業社製、商品名ゴーセノ−ルGL−05)、メチルHシリコン(日華化学社製、商品名ドライポン600)、亜鉛触媒(日華化学社製、商品名ドライポンZ7)を水に分散せしめた各々の割合が水/ポリビニルアルコール/メチルHシリコン/亜鉛触媒=88/8/2/2であるエマルジョンに前記基布不織布を含浸処理し、圧搾ロールで過剰の液を絞り120℃で乾燥して、前処理済不織布を得た。
前処理による基布不織布の質量増加は約10%であった。
ついで、固形分濃度が10重量%のポリテトラメチレン系ポリウレタン溶液に前記前処理済不織布を含浸させ、圧搾ロールで過剰の液を絞って、その上に固形分が22重量%のポリテトラメチレン系ポリウレタン溶液をドクターナイフにて700g/m塗工し、35℃の温水にて湿式凝固させた。
さらに50℃温水で充分水洗後、120℃にて乾燥させ、厚みが1.3mm、密度が0.31g/cmであり、製品目付けが400g/m前後の人工皮革原反を得た。
この物にエンボス加工を施し、着色加工、クリア仕上げをして得られた人工皮革は、表1に示す通り軽量でソフトであった。
【0019】
比較例1
基布不織布の製造に2.2デシテックス、51mmの円形断面のポリエステル短繊維(ユニチカ社製、E100)のみ単独で使用し、含浸ポリウレタン溶液の固形分濃度を10重量%とした以外は、実施例1と全く同様に処理した。
製品厚みが1.3mmとなるよう調整して得た、人工皮革原反の製品目付けは450g/m前後であった。
【0020】
比較例2
基布不織布の製造に2.2デシテックス、51mmの円形断面のポリエステル短繊維(ユニチカ社製、E100)のみ単独で使用し、不織布製造時の目付けを200g/mとした以外は、実施例1と全く同様に処理した。
製品厚みが1.3mmとなるよう調整して得た、人工皮革原反の製品目付けは450g/m前後であった。
【0021】
【表1】

Figure 0004194834
【0022】
表1に示す通り、非極細偏平断面短繊維を使用した基布不織布から作製した本発明の人工皮革は、通常の円形断面繊維を使用した場合に比し、軽量でソフトな感触の人工皮革であった。
【発明の効果】
極細ではない異形断面短繊維を使用することにより、通常の円形断面繊維を使った場合、あるいは極細繊維を使った場合よりも、見掛け密度の低い、バルキーな三次元絡合不織布が形成され、このものから軽量で、ソフトな感触の人工皮革がつくることができる。
【図面の簡単な説明】
【図1】 本発明で使用することのできる、楕円形や矩形以外の断面形状を有する異形断面短繊維の例であり、(A)三角形型、(B)ドッグボーン型、(C)十字型、(D)三日月型それぞれの繊維断面(1)および繊維側面(2)を示すものである。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an artificial leather that is light in weight and has a soft texture.
[0002]
[Prior art]
Artificial leather is composed of a non-woven fabric that is three-dimensionally entangled using mainly circular fibers of nylon and polyester, and an artificial leather substrate made of a polymer elastic body such as polyurethane supported on the nonwoven fabric.
In general, it is said that it is better to use ultrafine fibers in order to obtain artificial leather with excellent surface feel and texture. However, since ultrafine fibers are low in productivity and high in cost, a method of splitting from splittable fibers, etc. Many studies have been made on how to make ultrafine fibers (for example, Patent Document 1). Furthermore, it has also been proposed to obtain a napped fiber sheet in which ultra-fine flat cross-section fibers are entangled with a high shrinkage spun yarn knitted fabric so that the suede glossiness is closer to that of natural leather (for example, Patent Document 2).
Thus, conventionally, the improvement of artificial leather has been directed to the problem of how to make it closer to natural leather and how to make such physical properties at low cost.
On the other hand, artificial leather has a variety of uses, and there are many uses that require weight reduction, such as shoes, sports shoes, bags, and school bags, rather than being closer to natural leather.
[0003]
[Patent Document 1]
Japanese Patent Laid-Open No. 6-17360 [Patent Document 2]
Japanese Patent Laid-Open No. 2001-96658
[Problems to be solved by the invention]
An object of the present invention is to provide an artificial leather that is reduced in weight, has a soft texture, and is manufactured at low cost.
[0005]
[Means for Solving the Problems]
As a result of intensive investigations to achieve the above object, the present inventors have used ordinary circular fibers by using short fibers of non-ultra-shaped irregular cross-section yarns in the production of nonwoven fabrics. The present inventors have found that a bulky three-dimensional entangled nonwoven fabric having a lower apparent density is formed, and that a lightweight, soft artificial leather can be produced from this nonwoven fabric, thereby completing the present invention.
That is, in the present invention, at least 30% by weight or more of the irregular cross-section short fibers having a fiber length of 20 to 150 mm and a fineness of 0.5 to 5.0 dtex are contained in the constituent short fibers and three-dimensionally entangled. The present invention provides an artificial leather using a non-woven fabric as a base fabric.
In a preferred embodiment, the irregular cross-section short fiber is a flat cross-section short fiber having a flatness ratio A expressed by the major axis / minor axis of the fiber cross section of 1.5 ≦ A ≦ 8.0.
In a preferred embodiment, the artificial leather is obtained by impregnating the nonwoven fabric as the base fabric into a polyurethane elastomer solution and then wet coagulating it in an aqueous medium.
In a preferred embodiment, the artificial leather is obtained by fixing polyvinyl alcohol to the nonwoven fabric as the base fabric, impregnating the obtained pretreated nonwoven fabric with a polyurethane elastomer solution, and then wet coagulating in an aqueous medium. is there.
In a preferred embodiment, the artificial leather is a nonwoven fabric obtained without heat shrinkage and fiber splitting.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
It is necessary that the irregular cross-section short fiber used for the production of the base fabric nonwoven fabric in the present invention is a non-ultra fine irregular cross-section short fiber having a fiber length of 20 to 150 mm and a fineness of 0.5 to 5.0 dtex. However, a nonwoven fabric obtained by three-dimensionally intertwining such non-fine thin irregular-shaped short fibers becomes a bulky bulky material having a large porosity.
[0007]
Here, the irregular cross section means that it is not a normal circular cross section, in addition to a flat cross section such as an ellipse or a rectangle, for example, a triangular shape, a dogbone shape, a cross shape, a crescent shape, etc. as shown in FIG. Alternatively, it may be a deformed cross section such as a long shape obtained by crushing them.
[0008]
Because of such an irregular cross-section, compared to ordinary circular cross-section fibers, the degree of contact between the fibers at the entanglement point is loose, the sparse contact state with many voids, and non-fine fibers It is presumed that the entangled state is maintained as a whole, and a three-dimensional entangled nonwoven fabric having a large porosity is formed.
[0009]
Even for irregularly shaped fibers, fibers with a fineness of 0.5 decitex or less, especially ultrafine fibers with a decitex of 0.1 decitex or less, are difficult to bulky nonwoven fabrics, and fibers that are too thick with a fineness of 5.0 decitex or more are artificial. There is no texture as leather. That is, the modified cross-section fiber used in the present invention is non-fine and needs to have a fineness (thickness) that does not impair the texture when made into artificial leather.
In addition, even with non-fine thin shaped cross-section fibers, long fibers of 150 mm or more are less likely to cause dense three-dimensional entanglement between the fibers, and the nonwoven fabric is less likely to have a bulky property and has strength difficulties. There will be something. Therefore, the modified cross-section fiber for the base fabric nonwoven fabric of the present invention should be used in a region called a short fiber having a fiber length of 20 to 150 mm.
[0010]
In addition, among such non-ultra-thin irregular cross-section short fibers, it is a three-dimensional structure having a flat cross section as a whole. It is preferable because entanglement is easy to realize.
As such a flat shape, it is preferable that the flatness ratio A represented by the major axis / minor axis of the fiber cross section is 1.5 ≦ A ≦ 8.0.
[0011]
When the flatness A of the above-mentioned flat shaped irregular short fiber (hereinafter referred to as flat short fiber) is less than 1.5, the bulky property of the nonwoven fabric is insufficient, and sufficient weight reduction and softening cannot be realized. When the flatness ratio A exceeds 8.0, it becomes extremely difficult to make a nonwoven fabric, and even if it can be made into a nonwoven fabric, it may not reach the necessary quality (strength, etc.) as a nonwoven fabric for an artificial leather base fabric. There is.
Here, the flatness ratio A in the flat shape is represented by the major axis / minor axis of the fiber cross section. The major axis refers to the length of the longest part of the fiber cross section, and the minor axis refers to the length of the longest part in the direction substantially perpendicular to the major axis in the fiber cross section.
[0012]
The non-ultrafine irregular cross-section short fibers used in the present invention are obtained by a conventional method by introducing the polymer component into a spinneret hole having the desired irregular cross-section and spinning it with an EC cutter, round and round cutter, etc. be able to.
[0013]
Further, the non-ultrafine irregularly shaped short section fibers used in the present invention can be made from a polymer such as polyester, polyamide, polyolefin, polyacrylonitrile and the like, and polyester is preferably used from the viewpoint of dimensional stability.
[0014]
In the production of the base fabric nonwoven fabric of the present invention, the non-fine fine-shaped short section fibers as described above are preferably contained in the three-dimensional entangled nonwoven fabric at least 30% by weight or more, more preferably 40% by weight or more. From the viewpoint of achieving the above object, it is preferable.
[0015]
In the production of the nonwoven fabric for artificial leather according to the present invention, as a fiber that may be used in combination with non-ultrafine irregular cross-section short fibers, polyesters which are generally used from the viewpoint of physical properties and economical efficiency of the obtained artificial leather Short fibers having a circular cross section such as nylon are preferably used.
In addition, the base fabric nonwoven fabric includes a small amount of natural fibers such as wool, cotton and silk, and chemical fibers and synthetic fibers such as rayon, polyamide, acrylic, acetate and polyvinyl as long as the object of the present invention is not impaired. It may be a thing.
[0016]
An example of a preferred method for producing the artificial leather of the present invention is as follows.
A pre-treated nonwoven fabric is obtained by fixing polyvinyl alcohol to a non-woven fabric obtained by three-dimensionally intertwining polyester fibers containing non-fine fine cross-section short fibers by needling treatment. Next, after impregnating the polyurethane elastomer in a water-miscible organic solvent solution and squeezing out the excess polyurethane elastomer solution, the polyurethane elastomer solution is applied to the surface, wet coagulated in an aqueous medium, washed with water and dried. , To produce leather-like sheets.
[0017]
【Example】
Next, the present invention will be described in more detail with reference to examples and comparative examples.
Various characteristic values were measured by the following methods.
(Thickness):
The thickness was measured in each step using a Peacock thickness meter model H (minimum scale 0.01 mm) manufactured by Ozaki Mfg. Co., Ltd.
(density):
It measured based on the method prescribed | regulated to JISK-6505.
(Gurley stiffness):
It measured based on the method prescribed | regulated to JISL-1079. The smaller the value, the softer it is.
[0018]
Example 1
An elliptical polyester flat section short fiber having a fiber length of 51 mm and a fineness equivalent to 2.2 dtex, and a flatness ratio A expressed by the major axis / minor axis of the fiber cross section (brand name F330, manufactured by Unitika Ltd.) ) And a normal circular cross-section short fiber (Unitika, E100) having a fiber length of 51 mm and 2.2 decitex, blended at a mixing ratio = 50/50, and subjected to a needling treatment with a basis weight of 180 g / m 2 , A base nonwoven fabric having a thickness of 1.7 mm and a density of 0.11 was obtained.
Next, polyvinyl alcohol (manufactured by Nippon Synthetic Chemical Industry Co., Ltd., trade name Gohsenol GL-05), methyl H silicon (manufactured by Nikka Chemical Co., Ltd., trade name Drypon 600), zinc catalyst (manufactured by Nikka Chemical Co., Ltd., trade name) The base fabric non-woven fabric was impregnated with an emulsion in which dry pon Z7) was dispersed in water and each ratio was water / polyvinyl alcohol / methyl H silicon / zinc catalyst = 88/8/2/2, and the excess was pressed with a pressing roll. The liquid was squeezed and dried at 120 ° C. to obtain a pretreated nonwoven fabric.
The increase in mass of the base nonwoven fabric by pretreatment was about 10%.
Subsequently, the polytetramethylene-based polyurethane solution having a solid content concentration of 10% by weight is impregnated with the pretreated non-woven fabric, the excess liquid is squeezed with a squeeze roll, and the polytetramethylene-based solution having a solid content of 22% by weight thereon. The polyurethane solution was applied with a doctor knife at 700 g / m 2 and wet coagulated with warm water at 35 ° C.
Further, after sufficiently washing with warm water at 50 ° C. and drying at 120 ° C., an artificial leather raw fabric having a thickness of 1.3 mm, a density of 0.31 g / cm 3 , and a product basis weight of around 400 g / m 2 was obtained.
As shown in Table 1, the artificial leather obtained by embossing, coloring and clearing the product was lightweight and soft.
[0019]
Comparative Example 1
Example, except that only 2.2 decitex, 51 mm circular cross-section polyester short fiber (E100, manufactured by Unitika Co., Ltd.) was used alone for the production of the base fabric nonwoven fabric, and the solid content concentration of the impregnated polyurethane solution was 10% by weight. Treated exactly as in 1.
The product weight of the artificial leather raw fabric obtained by adjusting the product thickness to 1.3 mm was around 450 g / m 2 .
[0020]
Comparative Example 2
Example 1 except that only 2.2 decitex, 51 mm circular cross-section polyester short fibers (E100, manufactured by Unitika Ltd.) were used alone for the production of the base nonwoven fabric, and the basis weight at the time of manufacturing the nonwoven fabric was 200 g / m 2. And processed in exactly the same way.
The product weight of the artificial leather raw fabric obtained by adjusting the product thickness to 1.3 mm was around 450 g / m 2 .
[0021]
[Table 1]
Figure 0004194834
[0022]
As shown in Table 1, the artificial leather of the present invention produced from a non-woven fabric using non-fine flat cross-section short fibers is a lightweight and soft artificial leather compared to the case of using ordinary circular cross-section fibers. there were.
【The invention's effect】
By using irregularly shaped short cross-section fibers that are not very fine, a bulky three-dimensional entangled nonwoven fabric with a lower apparent density than when using ordinary circular cross-section fibers or ultrafine fibers is formed. It is possible to make artificial leather that is light and soft to the touch.
[Brief description of the drawings]
BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is an example of a deformed cross-section short fiber having a cross-sectional shape other than an ellipse or a rectangle that can be used in the present invention. (A) Triangular type, (B) Dogbone type, (C) Cross type , (D) shows the fiber cross section (1) and the fiber side surface (2) of the crescent moon type.

Claims (5)

繊維長が20〜150mmであり、繊度が0.5〜5.0デシテックスである異形断面短繊維を、構成短繊維中に少なくとも30重量%以上含有させて三次元絡合させた不織布を基布として使用した人工皮革。  A non-woven fabric in which at least 30% by weight or more of irregular shaped short fibers having a fiber length of 20 to 150 mm and a fineness of 0.5 to 5.0 dtex are contained in the constituent short fibers and woven in three dimensions. Artificial leather used as. 異形断面短繊維が、繊維断面の長径/短径で表される偏平率Aが1.5≦A≦8.0である偏平断面短繊維である請求項1記載の人工皮革。  2. The artificial leather according to claim 1, wherein the odd-shaped short cross-section fibers are flat cross-section short fibers having a flatness ratio A expressed by a major axis / minor axis of the fiber cross section of 1.5 ≦ A ≦ 8.0. 前記基布としての不織布をポリウレタンエラストマー溶液に含浸し、次いで水性媒体中で湿式凝固せしめて得られたものである請求項1または2記載の人工皮革。The artificial leather according to claim 1 or 2, wherein the nonwoven fabric as the base fabric is impregnated with a polyurethane elastomer solution and then wet coagulated in an aqueous medium. 前記基布としての不織布にポリビニルアルコールを固着せしめて、得られた前処理不織布をポリウレタンエラストマー溶液に含浸し、次いで水性媒体中で湿式凝固せしめて得られたものである請求項1から3のいずれかに記載の人工皮革。The polyvinyl alcohol is fixed to the nonwoven fabric as the base fabric, the resulting pretreated nonwoven fabric is impregnated with a polyurethane elastomer solution, and then wet coagulated in an aqueous medium. Crab artificial leather. 不織布は加熱収縮および繊維の割繊をせずに得られたものである請求項1から4のいずれかに記載の人工皮革。The artificial leather according to any one of claims 1 to 4, wherein the nonwoven fabric is obtained without heat shrinkage and fiber splitting.
JP2002373734A 2002-12-25 2002-12-25 Artificial leather Expired - Fee Related JP4194834B2 (en)

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