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Method for preparing composite superfine fiber artificial leather base fabric

A technology of artificial leather and superfine fiber, which is applied in fiber treatment, non-woven fabrics, melt spinning, etc., can solve the problems of low physical properties of synthetic leather, many fiber voids, and low island phase components, and achieve uniform fluff length, Uniform and evenly distributed fluff

Active Publication Date: 2011-08-31
ZHEJIANG HEXIN NEW MATERIAL CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the proportion of island phase components in this method is relatively low, generally around 50%. If it reaches more than 55%, the island phase will appear in irregular and abnormal shapes (especially large islands or islands adhere to each other). The composition of the synthetic leather is relatively high, after being extracted with toluene, the fiber leaves more voids and the density is low, and the physical properties of the synthetic leather are relatively low

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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  • Method for preparing composite superfine fiber artificial leather base fabric
  • Method for preparing composite superfine fiber artificial leather base fabric
  • Method for preparing composite superfine fiber artificial leather base fabric

Examples

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preparation example Construction

[0017] Such as figure 1 Shown, the preparation method of this composite microfiber artificial leather base cloth may further comprise the steps:

[0018] (1) impregnating the non-woven fabric made of sea-island type composite fiber in the DMF solution of polyurethane;

[0019] (2) Soak the semi-finished product obtained in step (1) in an aqueous solution of coagulation liquid DMF, carry out coagulation and foaming treatment, and polyurethane is made into an elastomer containing microcellular pores;

[0020] (3) washing with water;

[0021] (4) use toluene to dissolve the "sea" part in the sea-island fiber;

[0022] (5) drying and setting.

[0023] Wherein in (1) step, the manufacturing process of described sea-island type composite fiber is as follows figure 2 Shown: Using twin-screw sea-island composite spinning equipment, the molten island phase components are divided into multiple streams through the sea-island composite spinning plate, and are wrapped by the molten se...

Embodiment 1

[0078] Embodiment 1: the preparation of vehicle leather base cloth

[0079] (a) Raw material for spinning:

[0080] Dingdao components: polyester slices, viscosity 0.64dl·g -1 ;

[0081] Sea component: a blend of LDPE with a melt index of 50MFI and PA6 with a viscosity of 2.8η, wherein:

[0082] PE, grade MB9500, melt index is 50, produced by Korean LG company,

[0083] Nylon chips, grade M32800, relative viscosity is 2.8η;

[0084] (b) Raw material ratio: weight ratio: PET / (LDPE+PA6)=50 / (25+25);

[0085] (c) Specifications of island spinneret: number of holes × number of islands × aperture is 520 × 16 × 0.35mm;

[0086] (d) Screw extruder: specification 105, length-to-diameter ratio L / D=30:1;

[0087] (e) Metering pump specification: 15cc / rev;

[0088] (f) Cooling air temperature: 16°C, wind speed: 2.5m / s, static zone height: 25mm;

[0089] (g) Rotational speed of the oil pan: 22rpm / min, oil concentration: 1.5%;

[0090] (h) Spinning (winding) speed: 400m / min;

[00...

Embodiment 2

[0107] Embodiment 2: the preparation of elastic leather base cloth

[0108] (a) Raw material for spinning:

[0109] Fixed island components: PTT chips, intrinsic viscosity 1.10dl·g -1 ;

[0110] Sea component: a blend of LDPE with a melt index of 50MFI and PA6 with a viscosity of 2.6η, wherein:

[0111] PE, brand MB9500, melt index is 50, produced by Korean LG company;

[0112] Nylon chips, grade M32600, relative viscosity is 2.6η;

[0113] (b) Raw material ratio: weight ratio: PTT / (LDPE+PA6)=50 / (25+25);

[0114] (c) Specifications of island spinneret: number of holes × number of islands × aperture is 520 × 16 × 0.35mm;

[0115] (d) Screw extruder: specification 105, length-to-diameter ratio L / D=30:1;

[0116] (e) Metering pump specification: 15cc / rev;

[0117] (f) Cooling air temperature: 16°C, wind speed: 2.0m / s, static zone height: 25mm;

[0118] (g) Rotational speed of the oil pan: 22rpm / min, oil concentration: 1.5%;

[0119] (h) Spinning (winding) speed: 400m / min...

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Abstract

The invention discloses a method for preparing a composite superfine fiber artificial leather base fabric, which comprises the following steps of: (1) impregnating sea island composite type fiber nonwoven fabric in a DMF (dimethyl formamide) solution of polyurethane; (2) preparing micropore-containing elastomer by carrying out solidification and foaming treatment in an aqueous solution of solidified solution DMF; (3) washing with water; (4) removing a 'sea' part in sea island type fiber by an organic solvent; and (5) drying and shaping, wherein the sea island composite fiber nonwoven fabric is prepared from the sea island type fiber which is prepared by double-screw sea island-type composite spinning equipment, and marine facies components adopt a blend of PE (polyurethane) and PA (polyamide) the blending proportion of which is 45:55 to 55:45. The marine facies in the sea island type fiber also contain fixed amount of non-figured sea island fiber, so the proportion of comprehensive island components is prominently enhanced, the PE which needs to be extracted is reduced correspondingly, and the density and the physical properties of the prepared superfine fiber base fabric are enhanced.

Description

technical field [0001] The invention belongs to the artificial leather manufacturing technology, and relates to a method for manufacturing an artificial leather base cloth and a preparation method for a composite superfine fiber artificial leather base cloth. Background technique [0002] The microfiber artificial leather base cloth is the base of the microfiber artificial leather, which directly determines the physical properties and feel of the microfiber artificial leather. The microfiber artificial leather base cloth is made by impregnating the sea-island fiber non-woven fabric in the DMF (dimethylformamide) solution of polyurethane, and then soaking in the aqueous solution of coagulation liquid DMF for coagulation and foaming treatment, and then using organic The solvent dissolves the "sea" part of the island-in-the-sea fiber. Currently, there are two production methods of sea-island fibers used in the synthetic leather industry, namely fixed island method and indefini...

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 Applications(China)
IPC IPC(8): D04H1/42D01D5/08D01D5/30D01F6/60D01F6/62
Inventor 许志顾海云
Owner ZHEJIANG HEXIN NEW MATERIAL CO LTD
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