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Coating method of two-component polyurethane synthetic leather and coating machine special for two-component polyurethane synthetic leather

A two-component polyurethane and coating method technology, which is applied to chemical instruments and methods, devices for coating liquid on the surface, coatings, etc., can solve the problems of fast adhesion, production failure, etc., and increase production capacity , prevent loss, reduce energy consumption and environmental pollution

Active Publication Date: 2013-01-16
杭州云知本实业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the two-component liquid polyurethane gel is fast and has strong adhesion. The existing coating process is a coating machine using a fixed coating knife. When the two-component polyurethane mixture is scraped, the coating machine , the mixture will gel at the edge of the coating knife and stick to the edge of the knife, making production impossible

Method used

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  • Coating method of two-component polyurethane synthetic leather and coating machine special for two-component polyurethane synthetic leather
  • Coating method of two-component polyurethane synthetic leather and coating machine special for two-component polyurethane synthetic leather
  • Coating method of two-component polyurethane synthetic leather and coating machine special for two-component polyurethane synthetic leather

Examples

Experimental program
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Effect test

Embodiment 1

[0036] Embodiment 1: as figure 1 , figure 2 , image 3 , as shown in Figure 4, the special coating machine for two-component polyurethane synthetic leather consists of a frame 14, a substrate guide roller 7, an upper release paper guide roller 12, a lower release paper guide roller 13, an upper coating roller 6, Lower coating roller 10, motor 1, transfer case 2, upper coating roller transmission shaft 3, lower coating roller transmission shaft 8, left two-component polyurethane coating thickness adjustment arm 5, upper left coating roller opening cylinder 15, Left two-component polyurethane coating thickness adjustment motor 25, left two-component polyurethane coating thickness adjustment worm 24, left two-component polyurethane coating thickness adjustment worm wheel 22, right two-component polyurethane coating thickness adjustment arm 17, upper right gap Roller opening cylinder 16, right two-component polyurethane coating thickness adjustment motor 18, right two-component...

Embodiment 2

[0042] Embodiment 2: The difference between the two-component polyurethane synthetic leather coating machine provided in this embodiment and the embodiment 1 is that a release paper pallet 9 is added, so that the two-component polyurethane mixture is sprinkled on the attached release paper A controllable leveling time of the two-component polyurethane mixture is obtained on the surface layer of the paper, and then it is scraped by the upper coating roller 6 and the lower coating roller 10 to obtain a high-quality two-component polyurethane with uniform thickness, firm adhesion and soft hand feeling. Polyurethane synthetic leather.

[0043] Such as Figure 5 , Image 6 , Figure 7 , as shown in Figure 8, the two-component polyurethane synthetic leather special coating machine includes a motor 1, a transfer case 2, an upper coating roller transmission shaft 3, a bearing shaft seat 4, a left two-component polyurethane coating thickness adjustment arm 5, Upper coating roller 6,...

Embodiment 3

[0050] Embodiment 3: the difference between the two-component polyurethane synthetic leather special coating machine provided in this embodiment and embodiment 1 is that a pair of coating rollers, the upper coating roller 6 is a powerless roller, and the lower coating roller 10 Rotate under the drive of motor 1; the upper coating roller 6 is pulled by the winding machine I31, such as Figure 9 As shown, the winder I31 and the winder II32 are synchronized. Under the action of the base cloth and the upper coating roller wrapping angle, the upper coating roller 6 rotates accordingly, and the lower coating roller 10 rotates under the drive of the motor 1 to make the release paper (surface layer) moves forward with the substrate, such as Figure 10 As shown, the two-component polyurethane is sprinkled on the release paper (surface layer) at the front end of the upper and lower coating rollers, and is extruded evenly through the gap between the upper and lower coating rollers as the...

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Abstract

The invention relates to a synthetic leather and the production field of the synthetic leather, particularly to a coating method for producing a polyurethane synthetic leather by using two-component polyurethane and a coating machine special for the two-component polyurethane synthetic leather. The coating method includes penetrating a base material and release paper through gaps of a pair of coating rolls, spraying a two-component polyurethane mixture on the release paper, evenly blade coating the two-component polyurethane mixture on the release through the coating gaps, and clamping the coating between the base material and the release paper. The coating method of two-component polyurethane synthetic leather and the coating machine special for the two-component polyurethane synthetic leather have the advantages that the two-component polyurethane does not contact with the coating rolls directly, but contacts with the base material and the release paper (surface layer), so that production interruption due to the fact that gel adheres to a knife edge is avoided; the coating machine can adjusts the thickness of the two-component polyurethane accurately; the two-component polyurethane mixture can be prevented from running away and can be evenly sprayed on the base material; and production links are reduced, the capacity is improved, energy consumption and environmental pollution are reduced substantially, and the high-quality polyurethane synthetic leather is obtained.

Description

technical field [0001] The invention relates to the field of synthetic leather and its manufacture, in particular to a coating method for producing polyurethane synthetic leather with two-component polyurethane and a special coating machine thereof. Background technique [0002] At present, the production methods of polyurethane synthetic leather mainly include dry method and wet method. Both methods adopt the method of dissolving one-liquid polyurethane resin pellets in an organic solvent to form a slurry, and then use a coating machine to coat the slurry. The material is scraped and coated on the substrate to form a wet coating. The former is dried by heating, and the latter is solidified by water displacement to obtain a product. Whether it is heated and dried or solidified by water displacement, the obtained polyurethane solidified body is in a crystalline state. , its molecules are in a bonded state, so its physical properties are not in the best state. [0003] After ...

Claims

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Application Information

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IPC IPC(8): D06N3/14B32B37/15B05C1/08B05C11/00
Inventor 陈云铭傅小林
Owner 杭州云知本实业有限公司
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