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Superfine fiber polyurethane synthetic leather base fabric and preparation method thereof

A technology of ultrafine fiber and polyurethane, which is applied in the direction of conjugated synthetic polymer artificial filament, melt spinning, textiles and papermaking, etc., can solve the problems of easy adhesion of spandex and poor quality stability of ultrafine fiber synthetic leather products, and achieve Satisfy the effects of high resilience in one direction, good product quality stability, and good dimensional stability of finished products

Active Publication Date: 2010-10-06
HUAFON MICROFIBER SHANGHAI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Although ordinary nylon-based microfiber polyurethane synthetic leather has certain elasticity and softness, it still cannot meet the requirements of downstream products for high elasticity in one direction. For example, the elbow and knee parts of clothing require softness and high resilience at the same time. , so that the design style and graceful shape of the garment can be maintained
[0005] Patent ZL200510023908.5 reports that using polyurethane as the island phase and polyethylene as the sea phase to produce island-in-the-sea staple fibers can be used to produce high-resilience microfiber synthetic leather. High strength, high elongation at break, good elastic recovery, etc., but spandex is easy to stick during the process of dipping and toluene-soluble fiber opening, which will lead to poor product quality stability of superfine fiber synthetic leather

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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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Nylon 6 (nylon 6 chips, produced by Sinopec Baling Branch, the same below), PBT as the hard segment and polytetrahydrofuran diol as the elastic polyester TPEE of the soft segment (the hard segment accounts for 70%, the soft segment accounts for 30%) and Low-density polyethylene (LDPE) (1I50A, produced by Yanshan Petrochemical, the same below) three kinds of slices are mixed according to the ratio of 25.3: 21.7: 53 by weight, and vacuum sucked into a single-screw melt spinning machine for spinning (each section of the spinning machine The temperature is respectively, first stage: 145°C, second stage: 190°C, third stage: 250°C, fourth stage: 270°C, fifth stage: 285°C, sixth stage: 290°C, spinneret: 291°C), and then through the upper Oiling, drafting, crimping, setting and cutting processes, the island-in-the-sea type composite staple fiber with a monofilament fineness of 7dtex and a length of 50mm was obtained.

[0037] With above-mentioned short fiber, adopt the method k...

Embodiment 2

[0045] Nylon 6, PBT are the elastic polyester TPEE (hard segment accounts for 40%, soft segment accounts for 60%) and low-density polyethylene (LDPE) three kinds of chips that are hard segment and polyoxyethylene diol as soft segment by weight ratio: The ratio of 20: 20: 60 is mixed, vacuum sucked into a single-screw melt spinning machine for spinning (the temperature of each section of the spinning machine is respectively, one section: 150 ° C, two sections: 190 ° C, three sections: 250 ° C, four sections: 275°C, fifth stage: 285°C, sixth stage: 292°C, spinneret: 295°C), and then through the processes of oiling, drawing, crimping, shaping and cutting, the monofilament fineness is 7dtex and the length is 35mm. island-in-the-sea composite staple fiber.

[0046] With above-mentioned short fiber, adopt the method known in the art, after carrying out opening, impurity removal, carding, laying net, make fiber cross entanglement through needle punching, make the grammage 750g / m 2 ,...

Embodiment 3

[0054] With nylon 6, PBT as hard segment and polyoxypropylene glycol as soft segment elastic polyester TPEE (hard segment accounts for 80%, soft segment accounts for 20%) and low density polyethylene (LDPE) three kinds of slices are by weight: Mixed at a ratio of 45:15:40, vacuum sucked into a single-screw melt spinning machine for spinning (the temperature of each section of the spinning machine is respectively, the first section: 150 ° C, the second section: 190 ° C, the third section: 250 ° C, the fourth section: 275°C, 5th stage: 285°C, 6th stage: 292°C, spinneret: 295°C), and then through oiling, drawing, crimping, shaping and cutting, the monofilament fineness is 5dtex and the length is 50mm. island-in-the-sea composite staple fiber.

[0055] With above-mentioned short fiber, adopt the method known in the art, after carrying out opening, impurity removal, carding, laying net, make fiber cross entanglement through needle punching, make the grammage 670g / m 2 , Non-woven f...

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Abstract

The invention discloses superfine fiber polyurethane synthetic leather base fabric and a preparation method thereof. The superfine fiber polyurethane synthetic leather base fabric comprises the following components based on weight percent: 15-58% of nylon6; 2-40% of polyester elastomer and 30-56% of polyurethane resin. The elastic polyester is selected from one or more from TPEE (Thermoplastic Polyester Elastomer) and polytrimethylene terephthalate; and the TPEE is a linear segmented copolymer with the hard segment of PBT (Polybutylene Terephthalate) and the soft segment of aliphatic polyester. In the invention, the synthetic leather base fabric has excellent elasticity and resilience and is easy to process, and the size stability of the finished product is good. The zonal elasticity of the finished product base fabric is further higher than the radial elasticity thereof, and the zonal resilience of the finished product base fabric is more remarkable than the radial resilience thereof, thereby the finished product base fabric can meet the requirements of clients on the unidirectional high resilience of the superfine fiber synthetic leather.

Description

technical field [0001] The invention relates to an indeterminate island ultra-fine fiber polyurethane synthetic leather base cloth and a manufacturing method thereof, in particular to a unidirectional high-elastic ultra-fine fiber polyurethane synthetic leather base cloth and a manufacturing method thereof. Background technique [0002] Ultrafine fiber polyurethane synthetic leather is the third generation of artificial leather developed after PVC artificial leather and ordinary PU synthetic leather. High-density non-woven fabric with network structure, filled with polyurethane with optimized microporous structure, and processed after post-processing, it is comparable to natural leather in terms of strength, comfort and feel, and even in chemical resistance and wrinkle resistance. , wear resistance, processability and quality uniformity are better than natural leather. [0003] At present, domestic microfiber polyurethane synthetic leather is mainly used in shoemaking, clot...

Claims

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Application Information

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IPC IPC(8): D06N3/14D01D5/08D01F8/12D01F8/14D01F8/06
Inventor 刘文辉王贺玲夏佳弟吴义根叶芬弟王克亮
Owner HUAFON MICROFIBER SHANGHAI
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