Release paper taking stearate as release agent

A technology of stearate and release paper, which is applied in papermaking, paper coating, textiles and papermaking, etc. It can solve the problems of high coating amount, easy curling of release paper, and failure to meet the process conditions, etc. The effect of low coating weight and no curling

Active Publication Date: 2018-12-28
浙江池河科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] (1) Polyolefin (polyethylene, polypropylene) is used as the release material. The release paper has poor temperature resistance and the maximum operating temperature is 140°C. It is only suitable for PU artificial leather process, but cannot meet the process conditions of PVC and PU/PVC composite artificial leather.
The Chinese invention patent with the publication number CN 103866649A discloses a high-temperature-resistant release paper and its preparation process. The release paper release material is low-density polyethylene and high-density polyethylene, and the obtained release paper has high brightness. , high strength, low peeling force, but its maximum temperature resistance can only reach 135 ℃
In addition, the release paper contai

Method used

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  • Release paper taking stearate as release agent
  • Release paper taking stearate as release agent
  • Release paper taking stearate as release agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] (1) Raw material composition of anti-seepage layer

[0049]

[0050] 100 parts by weight of deionized water, add 1 part by weight of water-based dispersant (Bocheng Chemical SP-5040), add 100 parts by weight of light calcium carbonate (2000 mesh, Lingshou County Baifeng Mineral Products Processing Factory) under stirring conditions, Stir and disperse at high speed for 1 hour at a speed of 3000r / min, then add epoxy-modified acrylic emulsion (BLJ-6050A, Changzhou Aobang Chemical Co., Ltd. BLJ-6050A) and silicone leveling agent (Bocheng Chemical SP-931) in sequence according to the above weight parts, After stirring evenly, an anti-penetration layer coating solution was prepared, with a solid content of 49%, a pH of 9, and a viscosity of 560 cps.

[0051] (2) Raw material composition of release layer

[0052]

[0053] Add 4 parts by weight of fumed silica (2500 mesh, Wacker HDK-N20) into 30 parts by weight of deionized water, disperse in a high-speed mixer for 1 hour,...

Embodiment 2

[0056] (1) The raw material composition and process of the anti-seepage layer are the same as in Example 1

[0057] (2) Raw material composition of release layer

[0058]

[0059] Add 8 parts by weight of fumed silica (2500 mesh, Wacker HDK-N20) into 60 parts by weight of deionized water, disperse in a high-speed mixer for 1 hour, and rotate at a speed of 3000r / min, then add polyvinyl alcohol solution, alcohol Acid resin (Shandong Jiaying Chemical HKP-3180), chromium stearate (Zhengzhou Hanshuo Chemical Raw Materials Co., Ltd.), silicone leveling agent (Bocheng Chemical SP-931), continue to stir evenly to make a release layer coating The cloth liquid has a solid content of 15%, a pH of 3.1, and a viscosity of 380 cps.

[0060] The quantitative is 140g / m 2 The anti-penetration layer coating liquid is coated on the paper base by doctor blade coating process, the coating speed is 40m / min, the oven drying temperature is 140°C, and the coating amount of the anti-penetration la...

Embodiment 3

[0062] (1) The raw material composition and process of the anti-seepage layer are the same as in Example 1

[0063] (2) Raw material composition of release layer

[0064]

[0065] Add 3 parts by weight of aluminum hydroxide (2500 mesh, Shanghai Liangjiang Titanium White Chemical Products Co., Ltd.) into 30 parts by weight of deionized water, disperse in a high-speed mixer for 1 hour, and rotate at a speed of 3000r / min, then add polyvinyl alcohol in sequence according to the above parts by weight solution, zinc stearate emulsion (Dongguan Miaoke Industrial Co., Ltd.), polyether modified silicone wetting agent (Bocheng Chemical SP-994), and continue to stir evenly to make a release layer coating solution. The solid content It is 11%, the pH is 3.2, and the viscosity is 310cps.

[0066] The quantitative is 140g / m 2 The anti-penetration layer coating liquid is coated on the paper base by doctor blade coating process, the coating speed is 60m / min, and the oven drying temperatu...

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Abstract

The invention discloses release paper taking stearate as a release agent. The release paper includes base paper, an anti-permeation primer layer and a release layer which are sequentially composited,and the release layer takes the stearate as the release agent and takes polyvinyl alcohol resistant to high temperature as a resin. The release layer comprises, by weight parts, 100-300 parts of polyvinyl alcohol solution, 0-20 parts of alkyd resin, 2-30 parts of stearate release agent, 2-36 parts of matting agent, 1-10 parts of coating aid and 30-200 parts of water. The release paper is characterized by resisting high temperature, can be applied to a process of production of PU, PVC and PU/PVC composite artificial leather at the same time, the coating amount is low, the release paper is not curled, and the peeling strength can be adjusted for different artificial leather resins.

Description

technical field [0001] The invention relates to the field of leather processing and manufacturing, in particular to a release paper for artificial leather and a manufacturing method thereof. Background technique [0002] Leather release paper, also known as transfer paper, is an indispensable carrier in the production process of artificial leather and synthetic leather. It can transfer the pattern embossed on it to artificial leather and synthetic leather. When in use, polyurethane (PU) and polyvinyl chloride (PVC) resins are coated on the surface of this type of release paper in the form of a solution, and then dried, cross-linked, and cured, and then peeled off from the release paper to obtain Smooth or embossed faux leather. [0003] In the prior art, the release paper is composed of the base paper and the release coating on it. In order to improve the smoothness of the paper surface and prevent the surface coating from penetrating, some processes require coating a layer...

Claims

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Application Information

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IPC IPC(8): D21H19/82D21H19/58D21H19/38D21H19/60D21H19/40D21H19/62D21H19/46D21H21/14
CPCD21H19/38D21H19/40D21H19/46D21H19/58D21H19/60D21H19/62D21H19/822D21H21/14
Inventor 韩守臣陈涛
Owner 浙江池河科技有限公司
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