Adhesive tape

A technology of adhesive tape and gel rate, applied in the direction of adhesive, adhesive type, film/sheet adhesive, etc., can solve the problems of weakened surface release effect, irregular mold surface, and floating of the bonding surface, etc. , to achieve the effect of increasing gel rate and molecular weight, improving work efficiency, and improving anti-reflection

Active Publication Date: 2015-08-26
NITTO DENKO SHANGHAI SONGJIANG
View PDF4 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, since RIM molding is formed by opening and closing the upper and lower molds, and the surface of the mold is irregular and has a certain curvature
After 3

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
  • Adhesive tape
  • Adhesive tape
  • Adhesive tape

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0055] Example 1

[0056] 30 parts by weight of acrylic acid, 2.5 parts by weight of AIBN, 55 parts by weight of vinyl acetate, and 900 parts by weight of butyl acrylate were blended, and nitrogen replacement was performed for 2 hours. Under nitrogen substitution, polymerization was performed at 60°C for 6 hours to obtain an acrylic polymer (1) having a weight average molecular weight of 500,000 and a gel fraction of 45%.

[0057] 100 parts by weight of the acrylic polymer (1) and 2 parts by weight of a trifunctional isocyanate-based compound (trade name "CORONATEL", manufactured by Nippon Polyurethane Co., Ltd.) were uniformly mixed to obtain an acrylic adhesive (1).

[0058] The acrylic adhesive (1) was coated on a fluorinated ethylene-propylene polymer FEP (75 μm in thickness) as a substrate so that the thickness after drying was 30 μm, and after drying, an adhesive tape (1) was obtained.

Example Embodiment

[0059] Example 2

[0060] 40 parts by weight of acrylic acid, 3.0 parts by weight of AIBN, 55 parts by weight of vinyl acetate, and 900 parts by weight of butyl acrylate were blended, and nitrogen replacement was performed for 2 hours. Under nitrogen substitution, polymerization was carried out at 60°C for 6 hours to obtain an acrylic polymer (2) having a weight average molecular weight of 600,000 and a gel fraction of 55%.

[0061] 100 parts by weight of the acrylic polymer (2) and 2 parts by weight of the trifunctional isocyanate-based compound (trade name "CORONATEL", manufactured by Nippon Polyurethane Co., Ltd.) were uniformly mixed to obtain an acrylic adhesive (2).

[0062] The above-mentioned acrylic adhesive (2) was coated on a fluorinated ethylene-propylene polymer FEP (75 μm in thickness) as a substrate so that the thickness after drying was 30 μm, and after drying, an adhesive tape (2) was obtained.

Example Embodiment

[0063] Example 3

[0064] Repeat the steps of Example 1, except that the above-mentioned acrylic adhesive (1) of Example 1 is coated on the polytetrafluoroethylene PTFE (thickness of 75μm) as the base material so that the thickness after drying is 30μm. After drying, an adhesive tape (3) is obtained.

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

No PUM Login to view more

Abstract

The application relates to an adhesive tape which comprises a base material and a pressure-sensitive adhesive layer arranged on the base material in a lamination manner, and is characterized in that the base material is made of a fluorine-containing polymer; the pressure-sensitive adhesive layer is made of a (methyl) acrylate-based adhesive containing a (methyl) acrylate-based polymer. The adhesive tape has favorable contra warping resistance and abrasion resistance and a favorable surface release property before and after abrasion, and after being used, the adhesive tape can be formed and produced repeatedly for about 7,000 times, and floating and release weakening are avoided.

Description

technical field [0001] The application relates to an adhesive tape, which belongs to the field of adhesives. Background technique [0002] Reaction injection molding (reaction injection molding), referred to as RIM molding. In the past, in the RIM molding process, the resin used would contaminate the mold. In order to facilitate later cleaning, the mold will be protected with a pressure-sensitive tape with a release effect on the surface, and it will be peeled off after use. [0003] However, because RIM molding is formed by opening and closing the upper and lower molds, and the surface of the mold is irregular and has a certain curvature. Existing pressure-sensitive adhesive tapes can't be used because the surface release effect is weakened and the bonding surface floats after 3000-4000 times of repeated molding production. Contents of the invention [0004] The problem to be solved by the invention [0005] This application uses a substrate with a release effect and...

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): C09J7/02C09J175/04C08F220/18C08F218/08C08F220/06
Inventor 马文君
Owner NITTO DENKO SHANGHAI SONGJIANG
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap