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Superfine fiber polyurethane synthesis leather and preparation method thereof

A superfine fiber, polyurethane technology, applied in fiber processing, chemical instruments and methods, synthetic resin layered products, etc., can solve the problems of strong rigidity, poor rigidity, and uneven leather.

Inactive Publication Date: 2010-08-11
厦门象屿兴泓超细材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Under the prior art, due to the need to use solvent to selectively remove the sea component or the island component to form polyester ultrafine fiber or polyamide ultrafine fiber, the ultrafine fiber synthetic leather made by the composite island-in-the-sea fiber method can only be Fibers that retain one component, such as nylon (polyamide fiber) or polyester (polyester fiber), and nylon is characterized by being too soft, and polyester is characterized by being too rigid, so that only the nylon component is retained in the final leather Time-sharing, although it is soft and has a good hand feeling, its rigidity is poor, causing the problem of "leather is not firm"; when only the polyester component is kept, the rigidity is too strong and the hand feels hard

Method used

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  • Superfine fiber polyurethane synthesis leather and preparation method thereof
  • Superfine fiber polyurethane synthesis leather and preparation method thereof
  • Superfine fiber polyurethane synthesis leather and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] 1. Preparation of composite fibers

[0054] Take 25 parts of polyethylene terephthalate slices and put them into a polyester spinning screw extruder to melt and knead at 280 °C; take 75 parts of polycaprolactam chips into a polyamide spinning screw extruder to melt at 280 °C kneading. The mixed products of two screw extruders were subjected to figure 2 The 8-split spinneret shown is extruded, and the following examples all use this spinneret extrusion molding to obtain 8-split as-spun fibers, and the as-spun fibers are filled between the fiber skeleton and the fiber skeleton. The lobes between the fibers are composed of polyethylene terephthalate and the lobes are polycaprolactam;

[0055] The as-spun fibers were drawn sequentially by 1.8 times and 1.7 times, oiled with 4wt% silicone oil, and heat-set at 70°C to obtain composite fibers, which were then cut into 50mm composite short fibers.

[0056] 2. Preparation of non-woven fabric:

[0057] Unpack the composite s...

Embodiment 2

[0066] 1. Preparation of composite fibers

[0067] In this example, when preparing composite fibers, the weight ratio of polyethylene terephthalate: polycaprolactam is 75:25; wherein, polyethylene terephthalate forms the split part, and polycaprolactam forms the skeleton part; other The spinning process was the same as in Example 1 to obtain composite fibers.

[0068] 2. Preparation of non-woven fabrics

[0069] Get described composite fiber unpacking, carding, acupuncture to make density 0.23g / cm 3 , Gram weight is 525g / cm 2 of non-woven fabrics.

[0070] 3. Impregnated non-woven fabric

[0071] The PVA dipping solution comprises by weight: 3% polyvinyl alcohol and the remainder water;

[0072] Polyurethane impregnation liquid comprises by weight: 20% polyurethane resin P-138 (Shandong Yutian chemical company provides), 2.8% ammonium lauryl sulfate and balance DMF for wet-process synthetic leather;

[0073] The coagulation liquid comprises by weight: 39% dimethylformami...

Embodiment 3

[0078] 1. Preparation of composite fibers

[0079] In this example, when preparing composite fibers, the weight ratio of polyethylene terephthalate: polycaprolactam is 70:30; wherein, polyethylene terephthalate forms the split part, and polycaprolactam forms the skeleton part; other The spinning process was the same as in Example 1 to obtain composite fibers.

[0080] 2. Preparation of non-woven fabrics

[0081] Get described composite fiber unpacking, carding, acupuncture to make density 0.24g / cm 3 , the weight is 536g / cm 2 of non-woven fabrics.

[0082] 3. Impregnated non-woven fabric

[0083] The PVA dipping liquid comprises by weight: 1.5% polyvinyl alcohol and the remainder water;

[0084]Polyurethane dipping solution comprises by weight: 15% polyurethane resin P-138 (provided by Shandong Yutian Chemical Co., Ltd.), 2.1% ammonium lauryl sulfate and remainder DMF for wet-process synthetic leather;

[0085] The coagulation liquid comprises by weight: 30% dimethylforma...

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Abstract

The invention provides superfine fiber polyurethane synthesis leather, comprising non-woven fabric and polyurethane dipped in the non-woven fabric. The non-woven fabric is prepared from double-component superfine fibers, and the double components in the double-component superfine fibers are polyamide superfine fibers and polyester superfine fibers. The double-component superfine fibers comprise framework fibers in radial arrangement and ceasma fibers filled among the framework fibers, and the double components respectively form the framework fibers and the ceasma fibers. The superfine fiber polyurethane synthesis leather provided by the invention contains the polyester superfine fibers and the polyamide superfine fibers, thereby the synthesis leather retains the performances of the two superfine fibers, and has both the stiffness of terylene and the plasticity of nylon.

Description

technical field [0001] The invention relates to the field of artificial leather, in particular to a superfine fiber polyurethane synthetic leather and a preparation method thereof. Background technique [0002] Artificial leather is widely used because of its good wear resistance, heat resistance, cold resistance, high toughness and tensile strength. The artificial leather produced by impregnating non-woven fabrics with PU (polyurethane) resin is called PU synthetic leather. PU synthetic leather has the pattern and luster of natural leather. It is widely used for its rich colors, high strength, and not easy to damage. It is widely used in footwear industry, clothing industry, luggage industry, sports industry, automobile manufacturing and other industries. [0003] Microfiber PU synthetic leather is an artificial leather with a microfiber structure with a fineness of less than 0.33dtex. Due to the strong water absorption of superfine fibers, it has hygroscopicity comparable...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06N3/14B32B27/12D06C11/00D01D5/32
Inventor 张飞跃李为富
Owner 厦门象屿兴泓超细材料有限公司
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