Processing method for water-proof polyurethane imitation leather

A processing method, polyurethane technology, applied in chemical instruments and methods, textile and papermaking, synthetic resin layered products, etc. The effect of simple processing

Active Publication Date: 2009-07-29
WUXI MANYOULI NEW COMPOSITE MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are two main types of waterproof artificial leather, "PVC" waterproof leather and "PU" waterproof leather: "PVC" waterproof leather generally uses the characteristics of polyvinyl chloride itself to achieve waterproof effect, but at the same time because of the material itself The weight is relatively large, causing the weight of the product to exceed 500g per square meter, making the product very bulky and

Method used

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  • Processing method for water-proof polyurethane imitation leather

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] 1) Preparation of slurry: Mix 100 parts of polyester polyurethane UM-80F, 15 parts of dimethylformamide DMF, 7 parts of MEK, and 4 parts of leveling agent 224, then add modified polysiloxane defoamer 3 parts of BYK-A5551, use a 32KW high-speed mixer to stir at high speed for 1-2 hours, and when the viscosity of the slurry reaches 8000Pa.s or more, filter it twice with a 120-mesh nylon filter. The filtered slurry should be stored in a sealed plastic bag set In the iron drum, the standing time is more than 12 hours and it is used as fabric slurry.

[0014] 2) Coating process: first, unwind the inspected release paper without holes into the No. 1 oven, preheat it at 60°C, and then reach the No. 1 coating station. 150g / m 2 After coating and scraping, enter the No. 2 oven and dry at 160°C to reach the No. 2 coating station. The same prepared slurry is used at 180g / m 2 After coating and scraping, enter the No. 3 oven, dry at 160-165°C, and then send it to the No. 3 coating ...

Embodiment 2

[0017] 1) Preparation of slurry: Mix 100 parts of polyester polyurethane UM-80F, 10 parts of dimethylformamide DMF, 5 parts of butanone MEK, and 2242 parts of leveling agent, then add modified polysiloxane defoamer BYK - A55512 parts, use a 32KW high-speed mixer to stir at high speed for 1-2 hours, and when the viscosity of the slurry reaches 8000Pa.s or more, filter it twice with a 120-mesh nylon filter. The filtered slurry should be stored in an iron drum with a sealed plastic bag Inside, the standing time is more than 12 hours and it is used as fabric slurry.

[0018] 2) coating process: with embodiment 1.

[0019] Product performance: According to this example, the water pressure resistance of the finished leather can reach about 6800mm

Embodiment 3

[0021] 1) Preparation of slurry: Mix 100 parts of polyester polyurethane UM-80F, 20 parts of dimethylformamide DMF, 10 parts of MEK, and 5 parts of leveling agent 224, then add modified polysiloxane defoamer BYK -5 parts of A5551, use 32KW high-speed mixer to stir at high speed for 1-2 hours, and filter twice with 120-mesh nylon filter when the viscosity of the slurry reaches more than 8000Pa.s. The filtered slurry should be stored in a sealed plastic bag suit In the bucket, the standing time is more than 12 hours and it is used as fabric slurry.

[0022] 2) coating process: with embodiment 1.

[0023] Product performance: According to this example, the water pressure resistance of the finished leather can reach about 5500mm

[0024] The source of the used main raw material of embodiment:

[0025] Polyester polyurethane UM-80F Zhangjiagang Dongfang Synthetic Resin Co., Ltd.

[0026] Modified polysiloxane defoamer BYK-A5551 Hangzhou Wuyou Plastic Chemical Co., Ltd.

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Abstract

The invention discloses a processing method for waterproof polyurethane artificial leather. The polyurethane and dimethylformamide are mixed and then added with a modified polysiloxane defoaming agent for sufficient agitation, the agitated mixture, after being still placed for over 12 hours, is coated twice as a material slurry on release paper followed by drying and adherence of tetrahedral elastic foundation fabric, and is then dried by a baking oven to be winded and peeled; after being still placed for over 12 hours, the finished waterproof polyurethane artificial leather can be obtained. The invention has good waterproof performance, colorful appearance and soft hand feeling, and can withstand the high-frequency-suppressed temperature when processing. Compared with domestic similar products, the peeling force of the invention is 1.5 times, the bursting force of the invention is higher by 1/4, the tear load of the invention is 1.7 times, the resistance at high temperature of 180 DEG C is 20 minutes, the hydrolytic resistance is doubled and the like. In addition, the processing technique is simple and is convenient for specific implementation.

Description

technical field [0001] The invention relates to a processing method of artificial leather, in particular to a processing method of waterproof polyurethane artificial leather. Background technique [0002] Since the artificial leather product interview, products with various textures and specifications have appeared on the market, and their functions have also developed in diversification. Gradually, the waterproof artificial leather product has appeared due to the needs of the market. There are two main types of waterproof artificial leather, "PVC" waterproof leather and "PU" waterproof leather: "PVC" waterproof leather generally uses the characteristics of polyvinyl chloride itself to achieve waterproof effect, but at the same time because of the material itself The weight is relatively large, causing the weight of the product to exceed 500g per square meter, making the product very bulky and uncomfortable to wear, and the water pressure resistance effect can only reach abo...

Claims

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Application Information

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IPC IPC(8): D06N3/14B32B27/12B32B27/40
Inventor 宗政宇叶均
Owner WUXI MANYOULI NEW COMPOSITE MATERIALS
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