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Dyeing method of artificial leather

A dyeing method and technology for artificial leather, applied in the field of leather processing, can solve the problems of different dye requirements and inapplicability, and achieve the effect of increasing difficulty, stiffness and softness

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

But, because the dyeing method in the prior art is only applicable to the superfine fiber PU synthetic leather that contains single-component fiber, and the superfine fiber PU synthetic leather that contains two-component fiber has polyester fiber, polyamide fiber and polyurethane three The above three components have different requirements for dyestuffs, so the dyeing method in the prior art cannot be applied to PU synthetic leather including the above three components.

Method used

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  • Dyeing method of artificial leather
  • Dyeing method of artificial leather
  • Dyeing method of artificial leather

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064] 1. Preparation of composite fibers:

[0065] Take 25 parts of polyethylene terephthalate chips and put them into polyester spinning screw extruder, take 75 parts of polycaprolactam chips into polyamide spinning screw extruder, melt and knead them at 280℃ , the mixed product is subjected to such as figure 1 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;

[0066] 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 multifilaments with a fineness of 2.22dtex, and then cut into 51mm composite fibers. The composite fiber samples were tested and the results are listed in Table 1.

[0067] 2. Preparation of non-wo...

Embodiment 2

[0081] 1. Preparation of composite fibers:

[0082] In this example, 28 parts of polybutylene terephthalate chips and 72 parts of polyhexamethylene adipamide chips are taken as spinning raw materials, and the rest of the preparation process is the same as in Example 1. The skeleton part of the composite fiber obtained The component is polybutylene terephthalate, the split part is polyhexamethylene adipamide, the fineness is 2.25dtex, and the length is 50mm. The composite fiber was sampled and tested, and the results are listed in Table 1.

[0083] 2. Preparation of non-woven fabric:

[0084] Unpack the composite fiber prepared in step 1, comb and needle punch to make a density of 0.24g / cm 3 , the weight is 565g / cm 2 The non-woven fabrics, the measured properties of the non-woven fabrics are listed in Table 2.

[0085] 3. Non-woven impregnation:

[0086] In this example, the impregnation process of the non-woven fabric is the same as in Example 1, and the PU synthetic leath...

Embodiment 3

[0094] 1. Preparation of composite fibers:

[0095] Take 26.5 parts of polyethylene terephthalate chips and put them into a polyester spinning screw extruder, take 73.5 parts of polycaprolactam chips and put them into a polyamide spinning screw extruder, melt and knead them all at 275°C, The kneading product is extruded through a spinneret to obtain 8 lobes of nascent fibers, the nascent fibers are composed of a fiber skeleton part and a split part filled between the fiber skeletons, wherein the fiber skeleton part is composed of poly pairs Ethylene phthalate, split part is polycaprolactam;

[0096] The as-spun fibers were drawn sequentially by 1.6 times and 1.5 times, oiled with 4wt% silicone oil, and heat-set at 70°C to obtain multifilaments with a fineness of 2.42dtex, and then cut into 51mm composite fibers. The composite fiber samples were tested and the results are listed in Table 1.

[0097] 2. Preparation of non-woven fabric:

[0098] Unpack the composite fiber prep...

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Abstract

The invention provides a dyeing method of artificial leather, comprising: providing superfine fibre PU synthetic leather composed of superfine fibre non-woven fabric and polyurethane impregnated in the superfine fibre non-woven fabric, wherein the superfine fibre non-woven fabric is prepared from superfine fibre, and the superfine fibre comprises polyester superfine fibre and polyamide superfine fibre; adding the superfine fibre PU synthetic leather into dye bath filled with the dye containing the following components for dyeing; the dye comprises the following components in percentage by weight: 63-78% of acidic dye, 13-29% of disperse dye and the balance of metal complex dye; and dyed superfine fibre PU synthetic leather is dried after being washed by water. The dyeing method of the invention realizes the simultaneously and evenly dye of polyester fibre, polyarmide fibre and polyurethane in the superfine fibre PU synthetic leather, and prepared superfine fibre PU synthetic leather not only has proper stiffness and softness but also has abundant color.

Description

technical field [0001] The invention relates to the field of leather processing, in particular to a method for dyeing artificial leather. 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. In the 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 to natural leather. In addition, microfiber PU synthetic leather also surp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06P1/39D06P1/16D06P3/87
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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