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Preparation method of superfine fiber high-imitation grain synthetic leather

A technology of imitating top layer skin and ultra-fine fiber, which is applied in the directions of fiber processing, chemical instruments and methods, synthetic resin layered products, etc. problems such as the price of the top layer of leather, to achieve the effect of enhancing international competitiveness, uniform cell size and distribution, and improving quality

Active Publication Date: 2012-01-04
SHANDONG TONGDA ISLAND NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current synthetic leather products have no difference in the uniformity of the surface layer and the bottom layer density, so they do not have the plump feel and delicate surface effect of natural top layer leather, which makes it impossible to replace the top layer leather, let alone reach the price of the top layer leather.

Method used

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  • Preparation method of superfine fiber high-imitation grain synthetic leather

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] (1) Spinning of composite fibers

[0030] Nylon 6 slices and low-density polyethylene are mixed according to the mass ratio of 50:50, extruded and melted by a screw extruder, and the spinning temperature range is controlled at 245-285°C, after cooling and blowing (air temperature 25°C), pulling Stretching (drawing ratio 4.5 times), oiling (oil concentration 4.0%), crimping (the number of crimps is 20 / 25mm) and cutting, spinning 6D×51mm sea-island composite fibers, nylon 6 in the composite fibers For the island component, low density polyethylene is for the sea component.

[0031] (2) Production of non-woven fabrics

[0032] Use the island-in-the-sea composite fiber prepared in step (1) to make a non-woven fabric with a width of 1.55m and a thickness of 1.50-1.70mm. Its density reaches 0.29g / cm 3 , The thickness reaches 1.48mm. The process parameters of non-woven fabric production are needle punching frequency 500-1000 punches / min, needle punching density 1000-1500 p...

Embodiment 2

[0043] (1) Spinning of composite fibers

[0044] Nylon 6 slices and low-density polyethylene are mixed according to the mass ratio of 55:45, extruded and melted by a screw extruder, and the spinning temperature range is controlled at 245-285°C, and cooled and blown (air temperature 20°C) , drafting (drawing ratio 4 times), oiling (oil concentration 6.0%), crimping (17 crimps / 25mm) and cutting, and spinning a 7D×38mm sea-island composite fiber. Nylon 6 is the island component, and low-density polyethylene is the sea component.

[0045] (2) Production of non-woven fabrics

[0046] Use the island-in-the-sea composite fiber prepared in step (1) to make a non-woven fabric with a width of 1.65m and a thickness of 1.95-2.15mm. Its density reaches 0.30g / cm 3 , The thickness reaches 1.75mm. The process parameters of non-woven fabric production are needle punching frequency 1000-1500 punches / min, needle punching density 1500-2000 punches / m 2 , The number of laying layers is 40 laye...

Embodiment 3

[0057] (1) Spinning of composite fibers

[0058] Nylon 6 slices and low-density polyethylene are mixed according to the mass ratio of 60:40, extruded and melted by a screw extruder, and the spinning temperature range is controlled at 245-285°C, and cooled and blown (air temperature 16°C) , drafting (drawing ratio 6 times), oiling (oil concentration 10%), crimping (the number of crimps is 22 / 25mm) and cutting, and spinning a sea-island composite fiber of 5D×64mm, the composite fiber Nylon 6 is the island component, and low-density polyethylene is the sea component.

[0059] (2) Production of non-woven fabrics

[0060] Use the island-in-the-sea composite fiber prepared in step (1) to make a non-woven fabric with a width of 1.70m and a thickness of 3.10-3.30mm. Its density reaches 0.28g / cm 3 , The thickness reaches 3.0mm. The process parameters of non-woven fabric production are acupuncture frequency 800-1200 punches / min, acupuncture density 900-1700 punches / m 2 , The number...

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Abstract

The invention discloses a preparation method of superfine fiber high-imitation grain synthetic leather. The preparation method comprises the following steps of: spinning sea-island composite fibers by utilizing nylon 6 and low-density polythene as raw materials, manufacturing non-woven fabric by utilizing the sea-island composite fibers, coating one surface of the non-woven fabric by utilizing high-solid-concentration polyurethane slurry, infiltrating the non-woven fabric by utilizing low-solid-concentration polyurethane slurry, enabling the non-woven fabric to pass through an aqueous solution of dimethylformamide after infiltrating, solidifying polyurethane and forming a cellular structure to obtain synthetic leather semi-finished products, enabling the synthetic leather semi-finished products to pass through methylbenzene to separate sea-component low-density polythene out of the sea-island fibers, peeling off the sea-island composite fibers to be superfine fibers, washing away methylbenzene through boiling water, and drying to obtain the superfine fiber high-imitation grain synthetic leather. The product manufactured by the method disclosed by the invention has the advantages of strong gradient, abundant hand feeling, fine and smooth surface wrinkles and strong toughness after being bent, and has the beneficial effects on aspects of pollution reduction, animal protection, ecological protection and the like.

Description

technical field [0001] The invention relates to a preparation method of synthetic leather, in particular to a preparation method of superfine fiber high imitation head leather synthetic leather. Background technique [0002] Microfiber synthetic leather is a new type of high-grade artificial leather made of extremely fine fibers. It can be used in various fields such as shoes, bags, furniture, and automotive interiors. It has the characteristics of genuine leather and has better physical properties than genuine leather. index. It is a polyurethane synthetic leather based on a three-dimensional network structure microfiber nonwoven fabric. It is a new generation of synthetic leather developed in recent years. Some people call it the fourth generation of artificial leather, which is comparable to high-grade natural leather. , has the inherent breathability and moisture permeability of natural leather, and exceeds natural leather in terms of chemical resistance, physical prope...

Claims

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Application Information

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IPC IPC(8): D06N3/14B32B37/14B32B38/08B32B38/18B32B27/18D01D5/30
Inventor 刘利坤苑浩亮王吉杰郝盈博郑永贵王乐智
Owner SHANDONG TONGDA ISLAND NEW MATERIALS
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