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Preparation method of easy-dyeing microfiber leather

A microfiber leather and dyeing solution technology, which is applied in dyeing, textiles and papermaking, etc., can solve the problems of poor color fastness and color migration resistance, high temperature and high pressure required for dyeing process conditions, and restrictions on the application of high-end microfiber leather. , to achieve the effect of excellent drapability, high environmental protection and strong sense of skeleton

Inactive Publication Date: 2016-07-27
SHANDONG TONGDA ISLAND NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, most enterprises in the market use PA6 / LDPE melt-blended sea-island fibers, and use acupuncture technology to make nonwovens with a three-dimensional network structure. After relaxation and heat setting, the semi-finished product has a certain apparent density and hardness, and is produced by wet polyurethane impregnation. technology, complete polyurethane resin impregnation and DMF solvent extraction; use hot toluene extraction and separation technology to extract LDPE components in sea-island fibers to form PA6 ultrafine fiber bundles; finally, through soft finishing, sanding processing, dyeing and dry veneer, etc. The PA6 / PU superfiber synthetic leather made by post-processing technology has poor dyeing fastness and color migration resistance. Application in the field of leather

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] (1) Spinning of NEDDP / LDPE melt blended sea-island fibers

[0043] Select NEDDP polyester chips with an intrinsic viscosity of 0.768dl / g, and use continuous drying equipment for drying treatment. The pre-crystallization temperature is 110°C, the crystallization time is 1 hour, the drying temperature is 140°C, and the drying time is 5 hours, and the moisture content is ≤0.03%. The dry chips of NEDDP / LDPE were spun out according to the proportion relationship of NEDDP / LDPE mass fraction ratio of 60 / 40, and the melt-blended sea-island fibers with a length of 51mm and a fiber fineness of 6dtex were spun.

[0044] (2) Production of non-woven fabrics

[0045] Take the fibers prepared in step (1), and make a high-density nonwoven fabric with a thickness of 2.0 mm through opening, carding, laying, pre-punching with a pre-punching machine and needle-punching with a needle-looming machine; the pre-punching density is 300 pricks / m 2 , the needling density is 2000 pricks / m 2 , ...

Embodiment 2

[0057] (1) Spinning of CDP / COPET island-fixed composite sea-island fiber

[0058] Cationic dyeable polyester chips with an intrinsic viscosity of 0.575dl / g were selected and dried by continuous drying equipment. The pre-crystallization temperature was 120°C, the crystallization time was 1.5 hours, the drying temperature was 150°C, and the drying time was 4 hours. The moisture content was ≤ 0.03% dry slices; according to the mass ratio CDP / COPET ratio of 55 / 45, the fixed-island composite sea-island fiber with a length of 64mm and a fiber fineness of 8dtex was spun.

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

[0060] Take the fibers prepared in step (1), and make a high-density nonwoven fabric with a thickness of 1.8 mm through opening, carding, laying, pre-punching with a pre-punching machine and needling with a needle-punching machine; the pre-punching density is 400 stabs / m 2 , the needling density is 1000 pricks / m 2 , the number of laying layers is 25, the laying width ...

Embodiment 3

[0072] (1) Spinning of NECDP / LDPE island-fixed composite sea-island fiber

[0073] Select NECDP chips with an intrinsic viscosity of 0.650dl / g, and use continuous drying equipment for drying treatment. The pre-crystallization temperature is 130°C, the crystallization time is 1 hour, the drying temperature is 140°C, and the drying time is 6 hours. Slicing; according to the mass ratio NECDP / LDPE ratio of 65 / 35, spun island-fixed composite sea-island fibers with a length of 64 mm and a fiber fineness of 7 dtex.

[0074] (2) Production of non-woven fabrics

[0075] The above-mentioned fibers are made into a high-density nonwoven fabric with a thickness of 2.6 mm through opening, carding, web laying, pre-punching with a pre-punching machine and needle-punching with a needle-punching machine; wherein the pre-punching density is 350 punches / m 2 , the needling density is 1500 pricks / m 2 , the number of laying layers is 30 layers, the laying width is 3800cm, and the average weight is...

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Abstract

The invention discloses a preparation method of easy-dyeing microfiber leather.The preparation method comprises the steps that 1, sea-island fibers are spun; 2, a non-woven fabric is made from the sea-island fibers; 3, heat setting is conducted on the non-woven fabric; 4, a polyurethane sizing agent is impregnated and cured, and then semi-finished synthetic leather is prepared; 5, decrement is conducted on the unfigured sea-island fibers through a methylbenzene stripping technology or decrement is conducted on the figured sea-island fibers through an alkali decrement stripping technology, and superfine fiber synthetic leather can be prepared; 6, softening treatment and sueding treatment are conducted, and then synthetic leather to be dyed can be prepared after treatment is finished; 7, the synthetic leather to be dyed is dyed with dispersed dye liquid or cationic dye liquid, and after dyeing is finished, the easy-dyeing microfiber leather is obtained.The easy-dyeing microfiber leather product prepared through the method has the advantages of being high in fiber content, skeleton sense and environmental friendliness, excellent in drapability and high in dyeing fastness.

Description

technical field [0001] The invention relates to a preparation method of easy-to-dye superfiber leather. Background technique [0002] At present, most enterprises in the market use PA6 / LDPE melt-blended sea-island fibers, and use acupuncture technology to make nonwovens with a three-dimensional network structure. After relaxation and heat setting, the semi-finished product has a certain apparent density and hardness, and is produced by wet polyurethane impregnation. technology, complete polyurethane resin impregnation and DMF solvent extraction; use hot toluene extraction and separation technology to extract LDPE components in sea-island fibers to form PA6 ultrafine fiber bundles; finally, through soft finishing, sanding processing, dyeing and dry veneer, etc. The PA6 / PU superfiber synthetic leather made by post-processing technology has poor dyeing fastness and color migration resistance. application in the field of leather. Contents of the invention [0003] The purpos...

Claims

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Application Information

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IPC IPC(8): D06N3/14D06N3/00D06P1/16D06P1/41
CPCD06N3/0004D06N3/0011D06N3/14D06P1/16D06P1/41
Inventor 王乐智郑永贵张丰杰马丽豪王晓磊付红杰董瑞华王吉杰
Owner SHANDONG TONGDA ISLAND NEW MATERIALS
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