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 t

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0035] Example 1

[0036] Nylon 6 (nylon 6 slices, produced by Sinopec Baling Branch, the same below), PBT as the hard segment and polytetrahydrofuran diol as the soft segment, elastic polyester TPEE (hard segment accounts for 70%, soft segment accounts for 30%) and Three kinds of low-density polyethylene (LDPE) (1I50A, produced by Yanshan Petrochemical, the same below) were mixed in a weight ratio of 25.3: 21.7: 53, and were vacuumed into a single-screw melt spinning machine for spinning (each section of the spinning machine). The temperatures are, 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, shaping and cutting, and other processes, the sea-island type composite staple fiber with a monofilament fineness of 7dtex and a length of 50mm was prepared.

[0037] The above-mentioned short fibers are subjected to opening, impurity rem...

Example Embodiment

[0044] Example 2

[0045] The elastic polyester TPEE (hard segment accounts for 40%, soft segment accounts for 60%) and low density polyethylene (LDPE) three slices by weight ratio are: Mixing in a ratio of 20:20:60, vacuum suction into a single-screw melt-spinning machine for spinning (the temperatures of each section of the spinning machine are: 1st stage: 150°C, 2nd stage: 190°C, 3rd stage: 250°C, 4th stage: 275°C, five stages: 285°C, six stages: 292°C, spinneret: 295°C), and then through the processes of oiling, drawing, crimping, shaping and cutting, the monofilament has a fineness of 7dtex and a length of 35mm. Sea-island composite staple fibers.

[0046] The above-mentioned short fibers are subjected to opening, impurity removal, carding and laying by methods known in the art, and then the fibers are cross-entangled by needle punching to obtain a gram weight of 750 g / m. 2 , Non-woven fabric with a thickness of 3.98mm.

[0047] The above-mentioned non-woven fabric was...

Example Embodiment

[0053] Example 3

[0054] The elastic polyester TPEE (hard segment accounts for 80%, soft segment accounts for 20%) and low density polyethylene (LDPE) three pieces according to weight ratio are nylon 6, PBT as hard segment and polyoxypropylene glycol as soft segment. Mixing in a ratio of 45:15:40, vacuum suction into a single-screw melt-spinning machine for spinning (the temperatures of each section of the spinning machine are: 1st stage: 150°C, 2nd stage: 190°C, 3rd stage: 250°C, 4th stage: 275°C, five stages: 285°C, six stages: 292°C, spinneret: 295°C), and then after oiling, drawing, crimping, shaping and cutting, the monofilament fineness is 5dtex and the length is 50mm. Sea-island composite staple fibers.

[0055] The above-mentioned short fibers are subjected to opening, impurity removal, carding, and net laying by methods known in the art, and then the fibers are cross-entangled by needle punching to obtain a gram weight of 670 g / m. 2 , Non-woven fabric with a thickn...

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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

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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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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