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

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0028] Example 1

[0029] (1) Spinning of composite fiber

[0030] Nylon 6 chips 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 is controlled to be 245-285℃. After cooling, blowing (air temperature 25℃), drawing Stretching (4.5 times the drafting ratio), oiling (oil concentration of 4.0%), crimping (20 crimps / 25mm) and cutting, spun into a 6D×51mm sea-island composite fiber. The composite fiber contains nylon 6 It is an island component, and low-density polyethylene is a sea component.

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

[0032] Use the sea-island composite fiber obtained in step (1) to make a non-woven fabric with a width of 1.55 m and a thickness of 1.50 to 1.70 mm. Under the condition of a temperature of 110-140 ℃, the non-woven fabric is pressed and shaped by a roller to make Its density reaches 0.29g / cm 3 , The thickness reaches 1.48mm. The process parameters of non-wov...

Example Embodiment

[0042] Example 2

[0043] (1) Spinning of composite fiber

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

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

[0046] Use the sea-island 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. At a temperature of 110-140°C, the non-woven fabric is pressed and shaped by a roller to make Its density reaches 0.30g / cm 3 , The thickness reaches 1.75mm. The process parameters of non...

Example Embodiment

[0056] Example 3

[0057] (1) Spinning of composite fiber

[0058] The nylon 6 chips and low-density polyethylene are mixed correspondingly according to the mass ratio of 60:40, extruded and melted by a screw extruder, and the spinning temperature is controlled to be 245-285°C. After cooling and blowing (air temperature 16°C) , Drafting (drawing ratio 6 times), oiling (oil concentration of 10%), crimping (the number of crimps is 22 / 25mm) and cutting, and spinning out a 5D×64mm island-in-the-sea composite fiber. Nylon 6 is the island component, and low-density polyethylene is the sea component.

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

[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. The non-woven fabric is rolled and shaped by a roller at a temperature of 110-140°C. Its density reaches 0.28g / cm 3 , The thickness reaches 3.0mm. The process parameters of non-woven fabric producti...

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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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