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Impregnation method of non-woven fabric

A technology of non-woven fabrics and base fabrics, applied in textiles and papermaking, fiber types, fiber treatment, etc.

Active Publication Date: 2010-08-04
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

And the impregnation method in the prior art can only be applicable to the synthetic leather of producing single-component fiber

Method used

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  • Impregnation method of non-woven fabric
  • Impregnation method of non-woven fabric

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] 1. Preparation of bicomponent 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 stretched sequentially by 1.8 times and 1.7 times, oiled with 4wt% silicone oil, and heat-set at 70°C to obtain composite fibers, then cut into composite fibers of 50mm, and sampled the composite fibers The tests were carried out and the result...

Embodiment 2

[0066] 1. Preparation of split-type composite fibers:

[0067] 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 backbone component is polybutylene terephthalate, and the split component is polyhexamethylene adipamide. The composite fiber was sampled and tested, and the results are listed in Table 1.

[0068] 2. Preparation of non-woven fabric:

[0069] Unpack the split-type composite fiber obtained in step 1, card and needle punch it to make a density of 0.24g / cm 3 , Gram weight is 565h / cm 2 The non-woven fabrics, the measured properties of the non-woven fabrics are listed in Table 2.

[0070] 3. Impregnated non-woven fabric;

[0071] Import the non-woven fabric prepared in step 2 into a PVA impregnating machine for impregnation. The PVA impregnating solution includes: 2.4% polyvinyl alcohol in terms of...

Embodiment 3

[0077] 1. Preparation of split-type composite fibers:

[0078] Take 16 parts of polyethylene terephthalate chips and 0.5 parts of fiber additives and put them into the polyester spinning screw extruder, take 73.5 parts of polycaprolactam chips and put them into the polyamide spinning screw extruder, and put them in the Melt and knead at 275°C, and extrude the kneaded product through a spinneret to obtain 8 lobes of nascent fibers. The nascent fibers are composed of a fiber skeleton and a split part filled between the fiber skeletons. The skeleton part is polyethylene terephthalate, and the split part is polycaprolactam;

[0079] The as-spun fibers were stretched sequentially by 1.6 times and 1.5 times, oiled with 4wt% silicone oil, and heat-set at 70°C to obtain composite fibers, which were then cut into short fibers of 50 mm and sampled for the composite fibers The tests were carried out and the results are listed in Table 1.

[0080] 2. Preparation of non-woven fabric:

...

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Abstract

The invention provides an impregnation method of non-woven fabric, which comprises the following steps of: providing the non-woven fabric made of double-component composite fiber, wherein the double components are polyester component and polyamide component; using framework parts arranged in a radioactive way and splinter parts filled among the framework parts to form the non-woven fabric, wherein the splinter parts and the framework parts are respectively formed by the double components; carrying impregnation treatment on the non-woven fabric by using polyvinyl alcohol impregnation liquid, and obtaining first impregnation base fabric; then, carrying out impregnation treatment by using polyurethane impregnation liquid, and obtaining second impregnation base fabric, wherein the polyurethane impregnation liquid comprises the components based on mass concentration: 12-20 percent of polyurethane, 1-3.2 percent of impregnation auxiliary agent and balance DMF; and finally, leading the second impregnation base fabric to enter coagulating liquid for coagulating, water washing and drying. By adopting the method, the impregnation treatment can be carried out on the non-woven fabric, so that the double-component composite fiber can be reserved inside the leather, the double components can be prevented from being adhered with the leather, and the finally obtained PU synthetic leather not only has stiffness of terylene, but also has softness of nylon.

Description

technical field [0001] The invention relates to the field of leather processing, in particular to an impregnation method for non-woven fabrics. 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 als...

Claims

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Application Information

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IPC IPC(8): D06M15/333D06M15/564D06N3/04D06N3/14D06M101/32D06M101/34
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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