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A kind of production method of ultra-thin imitation polyurethane leather

A polyurethane leather and production method technology, applied in the direction of chemical instruments and methods, layered products, synthetic resin layered products, etc., can solve the problems of high toxicity, low similarity, and potential safety hazards, and achieve good scratch resistance, Not easy to fade, smooth hand effect

Active Publication Date: 2017-07-04
宏盛皮具(东莞)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the manufacturing process of artificial leather, solvent-based surface resins, solvent-based surface layer resins and solvent adhesives, surface resins, etc. are required to give leather lightening, extinction and various effects. These surface resins, surface layer resins and adhesives The glue is mainly solvent-based PU or acrylic. Organic solvents are flammable, explosive, smelly, and toxic, which not only poses safety hazards, but also endangers the physical and mental health of workers.
In addition, the artificial leather currently prepared has the defects of low similarity between the surface effect and PU products, and the physical properties such as peeling and hydrolysis resistance cannot meet the requirements for use.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A kind of production method of ultra-thin imitation polyurethane leather, comprises the steps:

[0024] (1) After treating the polyurethane surface layer with a pre-treatment agent, dry it at 120-130°C for 60 seconds;

[0025] (2), on the polyurethane surface layer of step (1), smear and scrape 5%w polyvinyl chloride foam layer slurry, coating thickness is 0.2mm, after carrying out micro-foaming treatment, put into baking oven again with 170~ Dry at 175°C for 30 seconds;

[0026] (3) Add hydrolysis-resistant resin to the slurry of the foam layer in step (2), and then apply a scraped polycarbonate sub-adhesive layer with a thickness of 0.08mm, and then put it in an oven and dry it at 155-160°C for 4 Hour;

[0027] (4), take the adhesive layer and the full viscose base cloth of step (3) in the three-version surface processing machine for processing and bonding;

[0028] (5), the polishing material of step (4) carries out embossing, polishing, rinsing grain, finished pr...

Embodiment 2

[0031] The adhesive used in the adhesive layer in step (3) is polyaziridine, and the embossing and water embossing of step (5) also includes a haze treatment process, and other steps are the same as in Example 1. The imitation PU leather is naturally bright, the coating has good wear resistance, scratch resistance and stain resistance, and the hand feels smooth, plump and thick.

Embodiment 3

[0033] The adhesive used for the bonding layer in step (3) is epoxy resin, and the embossing and water rubbing of step (5) also include the haze treatment process, and the other steps are the same as in Example 1. The surface effect of PU leather is more than 90% similar to that of PU products. It has a bright appearance, a smooth feel, a foaming ratio of 1.8, and moderate softness.

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PUM

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Abstract

The invention discloses a production method for an ultrathin polyurethane (PU) imitating leather. The method comprises the steps of: (1) treating a polyurethane surface layer by a pretreatment agent and then performing drying at 120-130DEG C; (2) coating the polyurethane surface layer with a foaming layer slurry, then putting the polyurethane surface layer into an oven to conduct drying at 170-175DEG C; (3) adding hydrolysis resistant resin to the foaming layer slurry, then coating an adhesive layer, and putting the material into an oven to perform drying at 155-160DEG C; (4) taking the adhesive layer and an all-adhesive base cloth to conduct treatment by a three-edition surface processor; and (5) carrying out after-treatment. According to the method provided by the invention, pretreatment is conducted on the polyurethane surface layer to make it have better scratch resistance and physical strength, the base layer adopts special hydrolysis resistant resin, the base cloth employs the all-adhesive base cloth, and the product is subjected to three-edition treatment and then to after-treatment. The prepared PU imitating leather finished product can reach the surface effect of PU products, and the peeling, hydrolysis resistance and other physical properties of the product are superior to those of PU products.

Description

technical field [0001] The invention belongs to the technical field of artificial synthetic leather, and in particular relates to a production method of ultra-thin imitation polyurethane leather. Background technique [0002] The characteristic of imitation PU leather is that the surface layer is polyurethane (PU), and the bottom layer is PVC. It not only has the characteristics of good hand feeling, appearance, air permeability, moisture permeability and easy surface treatment of PU leather, but also has the advantages of durable and low price of PVC leather. It has strong market competitiveness and has been widely used in the production of bags, clothing, footwear, furniture, sporting goods and other fields, accounting for 30-40% of the output of artificial leather. [0003] At present, in the production method of artificial leather, coating method (comprising direct coating method and transfer coating method) is the main manufacturing method of artificial leather. In the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D06N3/18B32B27/12B32B27/40B32B27/32
CPCB32B7/12B32B38/164B32B38/18B32B2255/10B32B2255/26D06N3/0043D06N3/0077D06N3/08D06N2203/068D06N2209/103D06N2209/16D06N2209/1621D06N2211/28
Inventor 林炳忠
Owner 宏盛皮具(东莞)有限公司
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