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Raising method for elastic non-woven base fabric

A non-woven and elastic technology, applied in the field of raising of new suede artificial leather, can solve the problems of affecting hairiness density, poor strength of base fabric, axial discontinuity, etc., and achieve good raising uniformity, high raising density, and wrinkle resistance. good effect

Inactive Publication Date: 2007-11-21
WUXI DOUBLE ELEPHANT MICRO FIBER MATERIAL +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Polyurethane elastic fibers made of polyurethane spinning at home and abroad cannot be produced and applied in the form of short filaments in textiles, but can only be used in weaving, knitting or compounding in the form of filaments, because the short filaments of elastic polyurethane cannot be used in carding. Carding on-board
[0005] In the existing artificial leather manufacturing technology at home and abroad, when suede artificial leather is made of fixed-island sea-island fibers, after the fixed-island type sea-island fibers are fibrillated, the sea is dissolved and removed to form ultrafine fibers. For island-sea-island fibers, because the islands are continuous in the axial direction, the strength of the base fabric is high, but the number of islands is small, and the hand feeling of artificial leather is poor (coarse fineness), which will affect the hairiness density after fluffing; For indeterminate island-type sea-island fibers, the islands are discontinuous in the axial direction, the length of the islands is short, the strength of the base fabric is poor, the number of islands after fiber opening is large, and the artificial leather feels good, but the size of the islands varies. The effect of suede is poor
Fixed island and indeterminate island sea-island fibers, after being made into non-woven base fabrics, use the elastic solvent-based polyurethane resin invented by DuPont in the United States in 1963. The resin is soft and the film is elastic, but it must be made of DMF (dimethyl At the same time, when the polyurethane resin is solidified, DMF is replaced with water, and the film produces micropores, which make the artificial leather breathable and moisture-permeable. It has good wearability, but DMF pollutes the environment and damages the operation. Therefore, developed countries and countries with advanced technology are trying to find alternatives. At present, more researches are on replacing solvent-based polyurethane with water-soluble polyurethane.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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  • Raising method for elastic non-woven base fabric
  • Raising method for elastic non-woven base fabric

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] 50% of polyurethane (PU) chips are islands, and 50% of polyethylene (PE) is sea islands. The sea-island fiber is obtained by island-fixed composite spinning. After drafting, crimping, and cutting, the fineness is 3.2dtex, and the number of crimps is 7 pieces / inch , a polyurethane elastic sea-island fiber A with a length of 51 mm.

[0036] Polyamide (PA) chip 50% islands, polyethylene (PE) 50% sea indefinite island type blend spinning to obtain indefinite island type sea-island fibers, after drafting, crimping and cutting, the fineness is 5.6dtex, and the number of crimps is 15 Each / inch, length is the polyamide inelastic sea-island short fiber B of 51mm.

[0037] The weight ratio of A fiber 30 to B fiber 70 is mixed, opened, carded, laid, and needled, and the weight of the fiber web is 360g / m 2 , needling density 800 pricks / cm 2 , Elastic needle-punched base → 95°C, 10 minutes hot water shrinkage → After drying, immerse in 10% PVA solution for sizing → After drying, u...

Embodiment 2

[0040] 50% of the polyurethane (PU) chips are islands, and 50% of polyethylene (PE) is the sea. The sea-island fiber obtained by island-fixed composite spinning, after drafting, crimping, and cutting, the fineness is 3.2dtex, and the number of crimps is 7 / , the polyurethane elastic sea-island fiber A with a length of 51mm.

[0041] Polyamide (PA) chip 50% islands, polyethylene (PE) 50% sea indefinite island type blend spinning to obtain indefinite island type sea-island fibers, after drafting, crimping and cutting, the fineness is 5.6dtex, and the number of crimps is 15 One piece / hour, polyamide non-elastic island-in-the-sea short fiber B with a length of 51mm.

[0042] The weight ratio of A fiber 50 and B fiber 50 is mixed, and the area shrinkage rate is 22.5%, and the other conditions are the same as in Example 1. The product is very soft to the touch, excellent in elasticity, dense and uniform in hairiness, strong in wrinkle resistance, and beautiful in appearance.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Abstract

The present invention adopts elastic sea-island fibre and inelastic sea-island fibre according to weight ratio of (20:80)-(80:20), and adopts the following steps: mixing, opening, carding, web-laying and needling to obtain elastic leather base fabric, then making shrinkage, applying water soluble slurry, sanding, applying adhesive, opening fibre, sanding, desizing, mellowing leather, sanding, dyeing and finishing so as to obtain the invented elastic non-woven base fabric.

Description

technical field [0001] The invention relates to a raising method of an elastic nonwoven base cloth in the field of nonwovens, in particular to a raising method of a novel suede-like artificial leather. Background technique [0002] In the past, the production of suede-like leather was based on fabrics, knitted fabrics, and non-woven fabrics, and after adding polymer resin to the base fabric, it was sanded on the surface to produce hairiness. The method of tanning. This napping is crucial to the quality of the final product suede artificial leather, especially the quality of feel and appearance, as well as physical properties such as strength. [0003] With the development of microfibers, the application of microfibers in tanning continues to expand. The artificial leather made of microfiber has a beautiful appearance and good internal quality, and is a high-end product with high added value. There are two main types of artificial leather produced with microfiber, one is s...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D04H11/00D06C11/00
Inventor 王一鸣顾宇霆郁崇文张元明郭建生刘安泰许彰
Owner WUXI DOUBLE ELEPHANT MICRO FIBER MATERIAL
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