Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

A kind of release paper with stearate as release agent

A stearate, release paper technology, applied in papermaking, paper coatings, textiles and papermaking, etc., can solve the problems of high coating weight, low peeling force, unfavorable PU resin film formation, etc., and achieve low coating weight. , The effect of stable peel strength

Active Publication Date: 2021-12-21
浙江池河科技有限公司
View PDF6 Cites 0 Cited by
  • 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 containing polyolefin release layer is coated by coating process in the production process, the coating amount is high, and the release paper is easy to curl during use
[0006] (2) Using polysiloxane as a release material, due to its poor adhesion to PU resin, is not conducive to PU resin film formation, and is prone to pre-peeling; and for artificial leather resins of different materials and compositions, the peeling strength will vary. There is a difference. For the hard-to-peel artificial leather resin, the peeling strength of the release paper is required to be lower, while for the easy-peelable artificial leather resin, the peeling strength is required to be higher. At present, several release materials cannot achieve controllable peeling. strength

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A kind of release paper with stearate as release agent
  • A kind of release paper with stearate as release agent
  • A kind of release paper with stearate as release agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] (1) The raw material composition of the impermeable 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. 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, and rotate at a speed of 3000r / min, then add polyvinyl alcohol solution, alcohol Acid resin (Shandong Jia...

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 380cps.

[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 lay...

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...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
diameteraaaaaaaaaa
particle diameteraaaaaaaaaa
thicknessaaaaaaaaaa
Login to View More

Abstract

The invention discloses a release paper using stearate as a release agent, comprising sequentially compounded base paper, an anti-penetration primer layer and a release layer, the release layer uses stearate as a release agent, Using high-temperature-resistant polyvinyl alcohol as the resin, the raw material of the release layer consists of: 100-300 parts of polyvinyl alcohol solution; 0-20 parts of alkyd resin; 2 parts of stearate release agent ‑30 parts; matting agent 2‑36 parts; paint additives 1‑10 parts; water 30‑200 parts. The release paper of the invention has high temperature resistance, can be simultaneously applied to the production process of PU, PVC and PU / PVC composite artificial leather, has low coating amount and does not curl, and can adjust its peeling strength according to 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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
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
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products