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Solvent-free top layer leather-imitated microfiber leather processing method

A technology that imitates top layer leather and processing methods, applied in textiles, papermaking, non-woven fabrics, etc., can solve problems such as consumer health impact, poor compactness of dense layer, environmental protection production pressure, etc., and achieve good physical properties and soft hand feeling , Delicate crease effect

Inactive Publication Date: 2018-11-16
SHANDONG TONGDA ISLAND NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional microfiber synthetic leather production process uses solvent-based pulp to form a dense layer on the non-woven fabric, which leads to the defects of poor density of the dense layer and residual solvents, which not only brings pressure on environmental protection production, but also may It has an impact on the health of consumers; therefore, it is of great significance to study a method for preparing imitation top layer microfiber leather without using or using less organic solvents

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] (1) Production of high-density nonwovens

[0030] Select indeterminate island-sea-island composite fibers with a length of 51mm, a fiber fineness of 8dtex, and a mass fraction ratio of PA6 and LDPE of 54:46 to make a nonwoven fabric with a web width of 1680mm and a thickness of 2.0mm. The process parameters are acupuncture frequency 900 pricks / min, acupuncture density 1500 pricks / cm 2 , the number of laying layers is 40 layers, the speed is 3.5m / min, and the average weight is 600g / m 2 , apparent density 0.30g / cm 3 .

[0031] (2) Scratch coating of solvent-free slurry

[0032] Select the model XCNS-4060C solvent-free slurry, and mix it according to the mass ratio of material A and material B at 100:74. When mixing, add additive 1 of model WRJ-514 and additive 2 of model WRJ307. The addition amount of agent 1 and auxiliary agent 2 is 0.2% of the total mass of material A and material B. Use a gap of 0.35mm to scrape-coat the solvent-free slurry on the flat release pap...

Embodiment 2

[0039] (1) Production of high-density nonwovens

[0040] Select indeterminate island-sea-island composite fibers with a length of 51mm, a fiber fineness of 7dtex, and a mass fraction ratio of PA6 and LDPE of 54:46 to make a nonwoven fabric with a web width of 1680mm and a thickness of 2.35mm. The nonwoven fabric The process parameters are acupuncture frequency 600 pricks / min, acupuncture density 800 pricks / cm 2 , the number of laying layers is 40 layers, the speed is 3.5m / min, and the average weight is 540g / m 2 , apparent density 0.23g / cm 3 .

[0041] (2) Scratch coating of solvent-free slurry

[0042] The non-woven fabric prepared in step (1) is rolled and shaped by rollers under the conditions of a drying room temperature of 130°C and a vehicle speed of 9m / min, so that the density reaches 0.315g / cm 3 , thickness 1.7mm. Select the model XCNS-4060C solvent-free slurry, and mix it according to the mass ratio of material A and material B at 100:74. When mixing, add additive...

Embodiment 3

[0049] (1) Production of high-density nonwovens

[0050] Select island-in-the-sea composite fibers with a length of 51mm, a fiber fineness of 6dtex, and a mass fraction ratio of PET and COPET of 65:35 to make a nonwoven fabric with a web width of 1680mm and a thickness of 2.4mm. The process of making nonwoven fabrics The parameters are acupuncture frequency 700 pricks / min, acupuncture density 1200 pricks / cm 2 , the number of laying layers is 40 layers, the speed is 3.5m / min, and the average weight is 600g / cm 2 , apparent density 0.25g / cm 3 .

[0051] (2) Scratch coating of solvent-free slurry

[0052] Put the nonwoven fabric prepared in step (1) under the conditions of drying room temperature of 135°C and vehicle speed of 8m / min, and roll the nonwoven fabric through rollers to make the density reach 0.35g / cm 3 , thickness 1.7mm. Select the solvent-free slurry of model XCNS-3016C, and mix it according to the mass ratio of material A and material B of 100:76. When mixing, a...

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Abstract

The invention discloses a solvent-free top layer leather-imitated microfiber leather processing method. The method comprises the following steps: 1) a figured or unfigured sea-island fiber composite fiber is used for producing high-density non-woven fabric; 2) a dense layer on the nonwoven fabric is formed by using solvent-free paste to obtain a base fabric, 3) the base fabric impregnated polyurethane slurry is solidified to obtain a synthetic leather semi-finished product, 4) according to different components in sea ingredients in the sea-island fiber, the synthetic leather prepared in the step 3) employs a toluene extraction or alkali decrement technology, sea ingredients in the sea-island fiber is stripped out, and steps of washing and drying are carried out to obtain the solvent-free top layer leather-imitated microfiber leather. The solvent-free top layer leather-imitated microfiber leather has the advantages of soft handle, good drapability, fine folding grain and good physical properties, the simulated effect is better, and no solvent residue is left in the microfiber.

Description

technical field [0001] The invention relates to a processing method of non-solvent imitation top layer superfiber leather. Background technique [0002] Microfiber synthetic leather is a new type of high-grade synthetic leather made of open fiber, which can be used in various fields such as leather shoes, bags, car seats, etc. It has a structure similar to genuine leather and has superior properties than genuine leather. physical index. It is a polyurethane synthetic leather based on a three-dimensional network structure microfiber non-woven fabric. It is a new generation of artificial leather currently developed. Therefore, the production and research and development of microfiber leather have always been aimed at replacing natural top layer leather. At present, Microfiber synthetic leather has successfully replaced natural split leather and sheepskin to quickly occupy the market and is favored by people. The traditional microfiber synthetic leather production process use...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06N3/00D06N3/14D04H1/46
CPCD04H1/46D06N3/0004D06N3/0011D06N3/004D06N3/005D06N3/0097D06N3/145D06N3/147D06N2209/1671D06N2211/28
Inventor 王乐智郑永贵马金美张丰杰王霏霏王晓磊
Owner SHANDONG TONGDA ISLAND NEW MATERIALS
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