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

Release layer and release paper used for artificial leather

A release layer and artificial leather technology, applied in papermaking, textiles, papermaking, coating, etc., can solve the problems of reducing polyurethane film detachment, easy curling of release paper, no oily shine, etc., achieve good peelability, not easy to curl, good silky effect

Inactive Publication Date: 2012-12-12
浙江池河科技有限公司
View PDF7 Cites 11 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] (1) When polysiloxane is used as the release layer, due to the poor affinity between polyurethane and polysiloxane, polyurethane is not easy to form a film, and polyurethane is prone to fall off during film formation. , the polyurethane film is also easy to detach from the release layer, that is, "pre-peeling";
[0008] (2) When using alkyd resin as the release layer, due to the good affinity between polyurethane and alkyd resin, the polyurethane film is not easy to peel off from the release layer after the adhesive is cured; When the type paper is embossed, the release paper will continuously produce cracks and voids. These cracks and voids will significantly reduce the ability of the polyurethane film to detach from the release paper on the one hand, and on the other hand will significantly reduce the oil wax on the surface of the polyurethane artificial leather. feel and silky
[0009] (3) When polyolefin (such as polypropylene or poly-4-methyl-1-pentene) is used as the release layer, due to the good affinity between polyolefin and polyurethane, the cured polyurethane artificial leather is not easy to peel off, especially It is especially difficult when there is a deep embossing on the polyolefin release liner. In addition, the release paper containing the polyolefin release liner tends to curl in a humid environment
[0010] In the embossing process in the manufacturing process of artificial leather, the pattern on the embossing roller determines the surface structure of the release layer of the release paper. Due to the defects of the existing embossing roller manufacturing technology itself, the details of the pattern of the embossing roller cannot be completely smooth , Usually, there will be burrs and unevenness. The pattern formed on the surface of the release paper by the embossing roller and the surface of the artificial leather made of this release paper all have the same problem, and the surface of the prepared artificial leather is whitish. , dry, non-greasy

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
  • Release layer and release paper used for artificial leather
  • Release layer and release paper used for artificial leather
  • Release layer and release paper used for artificial leather

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] In parts by weight, take 95 parts of polypropylene (melt index MFR: 28g / 10min), 5 parts of branched vinyl silicone oil (purchased from Shandong Dayi Chemical Co., Ltd., number average molecular weight: 60,000, vinyl content: 0.6 %), mix well and heat to 90°C, keep it warm for 2 hours, remove volatile components, then add 0.05 parts of dicumyl peroxide and mix well, and use extruder to coat base paper under the following extrusion coating conditions (quantitatively 128g / m 2 , corona treatment before coating) surface, while coating, embossing patterns were pressed by embossing rollers, and a release paper with a release layer thickness of 30 microns was prepared.

[0042] Extrusion coating conditions:

[0043] The temperature of each section of the extruder: C1 / C2 / C3 / C4 / XH / FP / die head are respectively

[0044] 240 / 270 / 310 / 330 / 320 / 320 / 310°C;

[0045] Mold width: 1800mm;

[0046] Extrusion speed: 80~100m / min.

Embodiment 2

[0048] In parts by weight, take 90 parts of polypropylene (MFR (melt index): 28g / 10min), 10 parts of branched vinyl silicone oil (purchased from Shandong Dayi Chemical Co., Ltd., number average molecular weight: 60,000, vinyl content is 0.6%) and mixed evenly and heated to 90 ° C, heat preservation for 2 hours, remove volatile components, then add 0.1 parts of dicumyl peroxide and mix evenly, under the extrusion coating conditions of Example 1, using extrusion Exit machine coated on base paper (quantity is 128g / m 2 , corona treatment before coating) surface, while coating, embossing patterns by embossing rollers to prepare a release paper with a release layer thickness of 35 microns.

Embodiment 3

[0050] In parts by weight, take 85 parts of polypropylene (MFR (melt index): 28g / 10min), 15 parts of branched vinyl silicone oil (purchased from Shandong Dayi Chemical Co., Ltd., number average molecular weight: 50,000, vinyl content is 0.5%) and mixed evenly and heated to 90 ° C, heat preservation for 2 hours, remove volatile components, then add 0.15 parts of dicumyl peroxide and mix evenly, under the extrusion coating conditions of Example 1, using extrusion Exit machine coated on base paper (quantity is 128g / m 2 , corona treatment before coating) surface, and embossing pattern by embossing roller while coating to prepare a release paper with a release layer thickness of 37 microns.

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
Thicknessaaaaaaaaaa
Thicknessaaaaaaaaaa
Thicknessaaaaaaaaaa
Login to View More

Abstract

The invention discloses a release layer used for artificial leather, which comprises the following raw material components of polyolefin, vinyl silicone oil and initiating agent. The invention also discloses release paper used for the artificial leather, which comprises body paper and the release layer adhered on one side of the surface of the body paper, wherein the thickness of the release layer is 30-150mu m. The release paper used for the artificial leather, which is disclosed by the invention, is unlikely to curl in the humid environment, the artificial leather prepared from the release paper is easy to strip from the release paper, and the surface of the manufactured artificial leather has excellent smooth feeling and oil wax feeling.

Description

technical field [0001] The invention relates to the field of artificial leather processing and manufacturing, in particular to a release layer and release paper for artificial leather. Background technique [0002] Release paper, also known as release paper, is a kind of anti-adhesive paper that can prevent prepreg from sticking and protect prepreg from contamination. [0003] Release paper is commonly used in the manufacture of artificial leather. The release paper includes a substrate and a release layer coated on the substrate. The substrate is generally base paper, and the release layer is usually formed by coating one side of the base paper surface with materials such as polysiloxane, alkyd resin, and polyolefin. . [0004] The invention with the application number 200810079831.7 discloses a release paper for synthetic leather, a multifunctional layer is arranged between the base material and the release layer, the components of the multifunctional layer and the parts...

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
IPC IPC(8): D21H27/18D21H19/22D21H19/32
Inventor 陈跃祖江黎明
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

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com