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Novel double-sided tape

A double-sided tape, a new technology, applied in the direction of adhesives, film/sheet adhesives, film/sheet release liners, etc., can solve the problems of expensive VHB tape, low bonding strength, and large equipment investment , to achieve the effect of low peel strength, high initial tack and high production yield

Pending Publication Date: 2021-08-13
宁波启合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] At present, the bonding of structural parts mainly adopts PET double-sided tape, foam double-sided tape, VHB tape, and glue dispensing. When using PET double-sided tape and foam double-sided tape for bonding, there are problems such as low bond strength and poor reworkability. Disadvantages: Although VHB tape is used for bonding, although the bonding strength is high, the die-cutting property is poor and cannot be reworked later, and VHB tape is expensive and the utilization rate is low; although the dispensing process can effectively avoid low bonding strength, the reworkability is poor and the equipment investment is large

Method used

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Experimental program
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Effect test

preparation example Construction

[0022] The preparation method of post-curing acrylic UV pressure-sensitive adhesive is as follows:

[0023] 1. Dissolve a certain proportion of butyl acrylate (BA), methyl methacrylate (MMA) and glycidyl methacrylate (GMA) monomers in ethyl acetate, add the initiator under the condition of feeding N2 Under reaction for 4-6h, polyacrylate prepolymer is obtained;

[0024] 2. Mix polyacrylate prepolymer with reactive diluent, photoinitiator, isocyanate crosslinking agent, etc. to prepare post-curing acrylic UV pressure-sensitive adhesive.

Embodiment 1

[0026] Apply the post-curing acrylic UV pressure-sensitive adhesive prepared above on the surface of the PET silicone heavy-release release film, the thickness of the coating is 5um, and after drying in the oven, it is bonded with the 2μm PET substrate layer to obtain a pressure-sensitive adhesive tape a project;

[0027] Apply the post-curing acrylic UV pressure-sensitive adhesive on the surface of the PET silicone release film, the thickness of the coating is 5um, and after drying in the oven, it is laminated with the uncoated surface of the substrate layer of the pressure-sensitive tape-engineering product. The semi-finished product is made, and the winding is completed and placed at a certain temperature for curing;

[0028] When testing and using, UV light is irradiated. When the illuminance is 58-60mW / cm², irradiate for 15s, and the cumulative energy is 1080mJ / cm² for performance testing;

Embodiment 2

[0030] Apply the post-curing acrylic UV pressure-sensitive adhesive prepared above on the surface of the PET silicone heavy release release film, the thickness of the coating is 5um, and after drying in the oven, it is bonded with the 100μm PET substrate layer to obtain a pressure-sensitive adhesive tape a project;

[0031] Apply the post-curing acrylic UV pressure-sensitive adhesive on the surface of the PET silicone release film, the thickness of the coating is 5um, and after drying in the oven, it is laminated with the uncoated surface of the substrate layer of the pressure-sensitive tape-engineering product. The semi-finished product is made, and the winding is completed and placed at a certain temperature for curing;

[0032] When testing and using, UV light is irradiated. When the illuminance is 58-60mW / cm², irradiate for 15s, and the cumulative energy is 1080mJ / cm² for performance testing;

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Abstract

The invention discloses a novel double-sided tape, comprising a first release layer, a first pressure-sensitive adhesive layer, a base material layer, a second pressure-sensitive adhesive layer and a second release layer, wherein the first release layer is arranged above the pressure-sensitive adhesive layer, the first pressure-sensitive adhesive layer is arranged above the base material layer, the second pressure-sensitive adhesive layer is arranged below the base material layer, and the second release layer is arranged below the second pressure-sensitive adhesive layer. According to the invention, the first pressure-sensitive adhesive layer and the second pressure-sensitive adhesive layer which are prepared from a post-curing acrylic acid UV pressure-sensitive adhesive are subjected to coating so as to form the tape, so the tape is high in initial viscosity at an initial stage, low in peel strength and convenient to position and rework; and after being irradiated by UV light, the tape is improved in adhesion degree, the peel strength of the tape is sharply increased to achieve a firm adhesion effect, and meanwhile, the temperature resistance of the tape is also greatly improved. A PET thin film, a PI thin film, a PVC thin film, a TPU thin film or a non-woven fabric is used as the base material layer, so a die-cutting property is excellent, the problems of adhesive overflowing, wire drawing and the like during die cutting can be avoided, and production yield is high.

Description

technical field [0001] The invention relates to the technical field of adhesive tapes, in particular to a novel double-sided adhesive tape. Background technique [0002] With the rapid development of electronics and communication industries, various adhesive tapes are suitable for such industries. As electronic products such as mobile phones, TVs, computers, navigators, or notebooks become multifunctional, lightweight, and highly integrated, multiple components need to be combined. Since adhesive tapes can effectively combine such components and make the appearance neat, so being widely used. In particular, small electronic devices are integrated with multiple components, and their internal structure is very complex, and gaps can be formed between various components arranged inside the casing and the casing, so the gaps need to be filled to make it resistant to the external environment , Therefore, it is necessary to configure sealing and shock-absorbing components. At thi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J7/25C09J7/24C09J7/40
CPCC09J7/255C09J7/245C09J7/25C09J7/40C09J2467/006C09J2475/006C09J2427/006C09J2433/00C09J2475/00C09J2421/00
Inventor 李晶刘川许梓晶孙振超
Owner 宁波启合新材料科技有限公司
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