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Water dyeing method of semi-polyurethane leather

A polyurethane leather and polyurethane technology, applied in the field of water dyeing of semi-polyurethane leather, can solve the problems of strong odor, affect the color depth, delamination, etc., and achieve the effect of reducing environmental pollution, excellent product performance, and smooth hand feeling.

Inactive Publication Date: 2014-07-23
浙江新富来实业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the manufacturing process of coated PVC leather, solvent-based surface resins, solvent-based surface layer resins, solvent adhesives, surface resins, etc. are required to endow the leather with luster, extinction and various effects. These surface resins, surface resins, etc. The first-layer resin and adhesive glue are 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.
[0005] In addition, the current semi-PU leather products often have the following problems: (1) The problem of color difference, the reason is related to the foam layer, such as the temperature of the oven is too high or too low, the temperature is too high and the foam layer is too thick, If the temperature is too low and the foaming layer is too thin, it will also affect the thickness of the finished product, and also affect the depth of the color; (2) blisters, which will occur during the production process; (3) appear Delamination
[0006] Therefore, with the improvement of people's living standards, people have put forward higher requirements for the ecology of leather products. The traditional semi-PU leather manufacturing method has been unable to meet the ecologically friendly leather requirements, nor can it meet the needs of semi-PU leather products. Appearance and performance requirements

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] A kind of water dyeing method of semi-polyurethane leather, comprises the steps:

[0019] Scrape the polyurethane surface layer slurry on the release paper, the coating thickness is 0.2mm; then put it in an oven to dry, first at 100°C for 30 seconds, then at 130°C for 30 seconds; then coat the polyurethane surface layer Scrape 5%wt polyvinyl chloride foam layer slurry, the coating thickness is 0.2mm, and then put it in an oven to dry and plasticize at 180°C for 30 seconds; apply a scratch adhesive layer on the foam layer slurry to polycarbonize Diimine is used as the adhesive, and the thickness of the adhesive layer is 0.08mm. Put it in an oven and dry it at 155-160°C for 4 hours; peel it off from the release paper, wind it up to get the bottom leather, and then emboss and surface it according to the conventional process. After surface treatment, the finished product of semi-polyurethane leather can be obtained after conventional kneading and drying.

[0020] The semi-...

Embodiment 2

[0022] A kind of water dyeing method of semi-polyurethane leather, comprises the steps:

[0023] Scrape the polyurethane surface layer slurry on the release paper with a coating thickness of 0.3mm; then put it in an oven to dry, first at 100°C for 60 seconds, then at 130°C for 30 seconds; then coat the polyurethane surface layer Scrape 10%wt polyvinyl chloride foam layer slurry, the coating thickness is 0.2mm, and then put it in an oven to dry and plasticize at 180°C for 30 seconds; apply a scratch adhesive layer on the foam layer slurry, and use epoxy The resin is used as an adhesive, and the thickness of the adhesive layer is 0.06mm. Put it in an oven and dry it at 155-160°C for 8 hours; peel off the release paper and wind it up to get the bottom leather, and then emboss and surface treat it according to the conventional process. After the surface treatment, the finished product of semi-polyurethane leather can be obtained after conventional kneading and drying.

[0024] Th...

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Abstract

The invention discloses a water dyeing method of semi-polyurethane leather. The water dyeing method of the semi-polyurethane leather comprises the steps that (1) a polyurethane surface layer sizing agents are coated on release paper and then put into a drying oven to be dried; (2) five to ten weight percent of foaming layer sizing agents are coated; (3) an adhesive layer is coated, the thickness of the adhesive layer is 0.05-0.1 mm, and then the adhesive layer is put into the drying oven to be dried; (4) base leather is obtained by stripping and coiling the release paper, surface treatment is carried out, and then a semi-polyurethane leather finished product is obtained. The water dyeing method of the semi-polyurethane leather selects water-borne adhesives, the use quantity of organic solvents in the making process of the semi-polyurethane leather is reduced, and environmental pollution is relieved. The semi-polyurethane leather made through the method is pure white in appearance, good in product performance, good in hand feeling and suitable for being used for making gloves, clothes, cases and the like.

Description

technical field [0001] The invention belongs to the technical field of artificial synthetic leather, and in particular relates to a water dyeing method of semi-polyurethane leather. Background technique [0002] Half polyurethane leather (half PU leather) is an upgraded product of PVC leather. It is characterized by PU on the surface and PVC on the bottom layer. The advantages of durable leather, low price, and strong market competitiveness have been widely used in the production of luggage, clothing, footwear, furniture, sporting goods and other fields, accounting for 30-40% of the output of artificial leather. [0003] But the semi-PU leather industry is also facing severe challenges of environmental pollution. The exhaust gas pollutants on the semi-PU leather production line mainly come from the disorderly discharge of organic solvents in solvent-based surface treatments, surface layer resins, and adhesives. These solvents include dimethylformamide (DMF), toluene, and et...

Claims

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Application Information

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IPC IPC(8): D06N3/08B32B37/26B32B38/16B32B27/08B32B27/40
Inventor 林炳忠
Owner 浙江新富来实业有限公司
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