Adhesive film and preparation method thereof

A technology for bonding adhesive films and adhesives, applied in the directions of adhesives, adhesive types, conjugated diene adhesives, etc. Unequal problems, to achieve the effect of improving die-cutting performance and thermal conductivity, reducing temperature, and bonding firmly

Pending Publication Date: 2022-04-22
潍坊同有新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The bonding of small structural parts mainly adopts ultra-thin PET double-sided tape and dispensing processes. When ultra-thin PET double-sided tape is used for bonding, there are disadvantages such as low bonding strength and poor reworkability; although the dispensing process can effectively avoid sticking The problem of low junction strength, but poor reworkability and large investment in equipment
[0004] At present, in the field of electroacoustics, the bonding of the dome and the diaphragm is realized by the process of dispensing UV glue. This process cannot be widely used due to the different types of diaphragm materials, such as the commonly used TPU diaphragm or TPEE diaphragm. The film has the problem of poor solvent resistance in the dispensing process, which leads to the dissolution and expansion of the diaphragm material and leads to poor finished products; at the same time, the dispensing will cause uneven glue thickness, resulting in poor bonding between the diaphragm and the dome. The dispensing process must be used with UV lamps, which will cause certain harm to the human body

Method used

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  • Adhesive film and preparation method thereof
  • Adhesive film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The raw materials for the preparation of the adhesive layer include the following components in parts by weight: 100 parts of solution-polymerized styrene-butadiene rubber Nipol NS616, 50 parts of terpene resin, 1.0 part of sulfur, 0.5 part of TMTD, 2,2'-methylenebis(4- Methyl-6-tert-butylphenol) 4.0 parts, graphite powder 10 parts.

[0028] The preparation method of adhesive is as follows:

[0029] (1) Dissolve the solution-polymerized styrene-butadiene rubber Nipol NS616 in toluene, and the solid content of the prepared rubber solution is 50%.

[0030] (2) Dissolve the tackifying resin with toluene, and the solid content of the prepared resin solution is 50%.

[0031] (3) Put the rubber solution in (1) above in a stirring device, add the tackifying resin solution in (2) above; then add sulfur, vulcanization accelerator TMTD, 2,2'-methylene Bis(4-methyl-6-tert-butylphenol) and graphite powder; fully dissolved and stirred into a uniform and stable viscous liquid, that...

Embodiment 2

[0034] The raw materials for the preparation of the adhesive include the following components in parts by weight: 100 parts of solution polymerized styrene-butadiene rubber Nipol NS616, 60 parts of terpene phenolic resin, 0.5 part of sulfur, 1.0 part of CZ, 2,6-di-tert-butyl p-cresol 5.0 parts, 20 parts of graphene.

[0035] The preparation method of adhesive is as follows:

[0036] (1) Dissolve solution polystyrene butadiene rubber Nipol NS616 with ethyl acetate, and the solid content of the prepared rubber solution is 30%;

[0037] (2) Dissolve the tackifying resin with ethyl acetate, and the solid content of the prepared resin solution is 40%.

[0038] (3) Put the rubber solution in (1) above in a stirring device, add the tackifying resin solution in (2) above; then add sulfur, vulcanization accelerator CZ, 2,6-di-tert-butyl P-cresol and graphene; fully dissolved and stirred into a uniform and stable viscous liquid, that is, a rubber-type pressure-sensitive adhesive (adhe...

Embodiment 3

[0041] The raw materials for the preparation of the adhesive include the following components in parts by weight: 100 parts of solution-polymerized styrene-butadiene rubber Nipol NS616, 70 parts of rosin resin, 2.0 parts of sulfur, 2.0 parts of NA-22, tetrakis[β-(3,5-ditertiary 1.0 parts of butyl-4-hydroxyphenyl) propionate] pentaerythritol ester, 5 parts of carbon nanotubes.

[0042] The preparation method of adhesive is as follows:

[0043] (1) Dissolve solution-polymerized styrene-butadiene rubber Nipol NS616 with ethyl acetate, and the solid content of the prepared rubber solution is 40%;

[0044] (2) Dissolve the tackifying resin with ethyl acetate, and the solid content of the prepared resin solution is 55%.

[0045] (3) Put the rubber solution in (1) above in a stirring device, add the tackifying resin solution in (2) above; then add sulfur, vulcanization accelerator NA-22, tetrakis[β-(3 , 5-di-tert-butyl-4-hydroxyphenyl) propionate] pentaerythritol ester and carbon n...

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Abstract

The invention belongs to the technical field of electroacoustic materials, and particularly relates to an adhesive film and a preparation method thereof, and the preparation method comprises the following steps: (1) preparing an adhesive; and (2) coating, rolling and curing. The adhesive film sequentially comprises a light release film layer, an adhesive layer and a heavy release film layer from top to bottom. The prepared adhesive film is excellent in performance, the technological operation is convenient, the defects of a dispensing technology are greatly overcome, the adhesive film is resistant to high temperature, waterproof and sealed, firm in bonding and uniform in thickness, meanwhile, the temperature of a vibrating diaphragm can be effectively reduced through the heat conduction performance, and the stability and reliability of the acoustic performance of an electronic product are greatly guaranteed.

Description

technical field [0001] The invention belongs to the technical field of electroacoustic materials, and in particular relates to an adhesive film and a preparation method thereof. Background technique [0002] With the rapid development of electronics and communication industries, various adhesive tapes are suitable for such industries. With the multi-functionality, portability and high integration of electronic products such as mobile phones, TVs, computers, navigators or notebooks, it is necessary to combine multiple components, especially the bonding of small components inside electronic equipment. [0003] The bonding of small structural parts mainly adopts ultra-thin PET double-sided tape and dispensing processes. When ultra-thin PET double-sided tape is used for bonding, there are disadvantages such as low bonding strength and poor reworkability; although the dispensing process can effectively avoid sticking The problem of low junction strength, but the reworkability is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J109/06C09J11/08C09J11/04C09J7/40C09J7/10
CPCC09J109/06C09J11/08C09J11/04C09J7/40C09J7/10C08K2201/011C09J2203/326C09J2301/408C08L45/00C08K3/04C08L61/06C08K3/042C08L93/04C08K3/041
Inventor 汪勇
Owner 潍坊同有新材料科技有限公司
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