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Foaming adhesive tape applied to automobile EPDM (Ethylene-Propylene-Diene Monomer) sealing strip and preparation method thereof

A foam and sealing strip technology, applied in the field of foam tape and its preparation, can solve the problems of low surface energy, complex process, cohesive damage and sticking, etc., to achieve improved bonding performance, simple preparation process, and environmental friendliness Effect

Pending Publication Date: 2022-05-27
GUANGDONG HONGQING ELECTRONICS MATERIALS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Due to the relatively low surface energy of the automobile sealing strip EPDM, the conventional acrylic foam tape is not firmly pasted, and it is easy to fall off, causing the paste to fail; the PE foam tape or PU foam used, because the foam cohesion is too small, resulting in Poly destroys the paste and fails
[0003] The matrix resin of acrylic foam is mostly a single acrylic resin, the storage modulus of the resin is low, the foaming technology adopts the physical filling type, mainly adding hollow glass beads, the tape product is hard, the polarity is relatively high, only It is suitable for the paste of high surface energy materials, and it is not firm for EPDM sealing strips
[0004] At present, the solution adopted in the market is to brush a layer of primer on the EPDM sealing strip to increase the bonding strength of the acrylic foam, but the disadvantage is that the process is complicated, and the primer contains highly volatile toluene, xylene, etc. Affect the environment and the physical and mental health of operators

Method used

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  • Foaming adhesive tape applied to automobile EPDM (Ethylene-Propylene-Diene Monomer) sealing strip and preparation method thereof

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Experimental program
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preparation example Construction

[0032] Preparation method of foaming body tape applied to automotive EPDM sealing strip, comprising the following steps:

[0033] C1, weigh the low molecular weight acrylic acid prepolymer for 40-50 parts, high molecular weight acrylic prepolymer for 10-20 parts, stir for 1h, completely mix evenly, and then add to the first area of the twin screw extruder;

[0034] C2, add 10-20 parts of block copolymer, 10-30 parts of tackifying resin, 0.2-1 part of antioxidant, 0.2-0.5 parts of carbon black to the second region of the twin screw extruder, the temperature is 150 °C;

[0035] C3, and then further add the foaming powder to the third area of the twin screw extruder, the temperature is 160 °C, to obtain the foam glue;

[0036] C4, finally mixed evenly, coated 0.8-1.1mm thick foam gel into the cooling roller, after cooling to transfer to the release film, and then with the EB electron beam curing cross-linked molding, rewind to obtain foam body tape.

Embodiment 1

[0038] C1, weigh the low molecular weight acrylic acid prepolymer for 52 parts, high molecular weight acrylic acid prepolymer for 14.5 parts, stir for 1h, completely mix evenly, and then add to the first area of the twin screw extruder;

[0039] C2, add 20 parts of block copolymer, 11 parts of tackifying resin, 0.2 parts of antioxidant, 0.3 parts of carbon black to the second area of the twin screw extruder, the temperature is 150 °C;

[0040] C3, and then further add the foaming powder to the third zone of the twin screw extruder, the temperature is 160 °C, to obtain the foam glue;

[0041] C4, finally mixed evenly, coated with 1.1mm thick styrofoam into the cooling roller, after cooling transferred to the release film, and then with the EB electron beam for curing cross-linking molding, rewinding to obtain foam body tape.

[0042] Wherein, the block copolymer is a multi-peak asymmetrical star-shaped block copolymer, the block copolymer using Kraton D1124; the tackifying resin us...

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Abstract

The invention relates to the field of adhesive tapes, in particular to a foaming body adhesive tape applied to an automobile EPDM (Ethylene-Propylene-Diene Monomer) sealing strip, which sequentially comprises a release film protective layer and a foam layer from top to bottom, the foam layer is prepared from the following raw materials in parts by weight: 40 to 50 parts of low molecular weight acrylic acid prepolymer, 10 to 20 parts of high molecular weight acrylic acid prepolymer, 1 to 3 parts of foaming agent, 10 to 20 parts of block copolymer, 10 to 30 parts of tackifying resin, 0.2 to 1 part of antioxidant, 1 to 3 parts of foaming powder and 0.2 to 0.5 part of carbon black. According to the foaming body adhesive tape applied to the automobile EPDM sealing strip, the adhesive property of the EPDM sealing strip is improved. The invention also provides a preparation method of the foaming adhesive tape applied to the automobile EPDM sealing strip, and the preparation method is simple in process and environment-friendly.

Description

Technical field [0001] The present invention relates to the field of tape, in particular to a foaming body tape applied to automotive EPDM sealing strip and a preparation method thereof. Background [0002] Automotive sealing strip EPDM due to the relatively low surface energy, the paste tape using conventional acrylic foam body tape paste is not strong, easy to fall off and cause the paste failure; the use of PE foam tape or PU foam, due to the cohesion of the foam is too small, resulting in cohesion damage paste and failure. [0003] The matrix resin of acrylic foam mostly uses a single acrylic resin, the energy storage modulus of the resin is low, the foaming technology adopts physical filling type, mainly adding hollow glass beads, tape products are hard, polarity is relatively high, can only be applied to the paste of high surface energy materials, and the EPDM sealing strip is not firmly attached. [0004] At present, the scheme used on the city Yang is to brush a layer of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J7/10C09J7/30C09J7/40C09J5/08C09J133/08C09J11/04C09J11/06C09J11/08
CPCC09J7/10C09J7/30C09J7/401C09J5/08C09J133/066C09J11/04C09J11/06C09J11/08C09J2203/354C09J2423/045C09J2467/005C08L33/064C08L53/02C08L93/04C08K5/1345C08K3/04
Inventor 方友梁书泉陈小聪
Owner GUANGDONG HONGQING ELECTRONICS MATERIALS TECH CO LTD
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