Easily-recognized and easily-unwound composite expansion adhesive tape and preparation method thereof

An easy-to-identify and tape technology, applied in the direction of film/sheet adhesives, adhesives, adhesive types, etc., can solve the problems of low expansion ratio of intumescent films, difficulty in industrial production, and high unwinding force of tapes, and achieve the same The effect of good capacitance, stable and clear color retention, and easy unwinding performance

Pending Publication Date: 2022-04-12
DONGGUAN AOZON ELECTRONICS MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Patent CN112646505A discloses a high-temperature-resistant composite expansion film, but it is a transparent or solid-color tape, which cannot realize automatic and precise glue alignment during the glue application process, and the glue application process is complicated
Moreover, the unwinding force of the tape is high, and it is difficult to unwind during use, which makes it difficult for industrial production
Moreover, the expansion ratio of the expansion film is low and the temperature resistance is poor. In the high-temperature electrolyte environment existing in the production and use of lithium batteries, the anti-shrinkage performance, the expansion ratio improvement, and the ability to maintain shape and strength need to be further improved.

Method used

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  • Easily-recognized and easily-unwound composite expansion adhesive tape and preparation method thereof
  • Easily-recognized and easily-unwound composite expansion adhesive tape and preparation method thereof
  • Easily-recognized and easily-unwound composite expansion adhesive tape and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] figure 1 A structural diagram of the second rubber viscosity of the composite expansion tape provided by the present embodiment. 1 is the rubber area, 2 is the detail area.

[0041] A method of preparing a composite expansion tape that is easy to unconflexible, specifically comprising the steps of:

[0042] Step 1: 50μmPET film as a temperature resistant layer, including back pairs of corona surfaces and non-electric disoste, continuously coating transparent polyacrylate glue, forming a first rubber, thickness at 50 μmPET film 10μm;

[0043] Step 2: The 50 μmPET film coated with the first rubber layer is solidified after the oven is solidified with the corona surface of the expanded film (50 μm thickness);

[0044] Step 3: The blue polyacrylate glue is applied in the width direction of the 25 μmPET from the width direction of the 25 μmPET to form a second gel layer, the thickness of 6 μm; the second rubber layer includes along the tape The width direction interval sets the...

Embodiment 2

[0052] A method of preparing a composite expansion tape that is easy to unconflexible, specifically comprising the steps of:

[0053] Step 1: 50μmPET film as a temperature resistant layer, including back pairs of corona surfaces and non-electric disoste, continuously coating transparent polyacrylate glue, forming a first rubber, thickness at 50 μmPET film 8μm;

[0054] Step 2: 50 μmPET membranes coated with the first rubber viscosity were solidified with an electric silica surface of the expansion film (40 μm thick) after the oven;

[0055] Step 3: The blue polyacrylate glue is applied in the width direction of the 25 μmPET from the width direction of the 25 μmPET to form a second rubber viscous layer, and the thickness is 8 μm; the second rubber is included. The width direction interval sets the rubber area and the detail.

[0056] Step 4: 25 μmPET release film coated with a second rubber layer was solidified with a 50 μmPET film.

[0057] Step 5: Target, remove 25 μmPet release ...

Embodiment 3

[0063] A method of preparing a composite expansion tape that is easy to unconflexible, specifically comprising the steps of:

[0064] Step 1: 50μmPET film as a temperature resistant layer, including back pairs of corona surfaces and non-electric disoste, continuously coating transparent polyacrylate glue, forming a first rubber, thickness at 50 μmPET film 6μm;

[0065] Step 2: 50 μmPET membranes coated with the first rubber viscosity were solidified with an electric silica surface of the expansion film (40 μm thick) after the oven;

[0066] Step 3: Blue polyacrylate glue is applied in the width direction of 25 μmPET from the width direction of 25 μmPET, and the thickness is 10 μm, and the second rubber viscosity layer includes along the tape. The width direction interval sets the rubber area and the detail.

[0067] Step 4: 25 μmPET release film coated with a second rubber layer was solidified with a 50 μmPET film.

[0068] Step 5: Target, remove 25 μmPet release film.

[0069] Th...

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Abstract

The invention provides a composite expansion adhesive tape easy to identify and unroll. The composite expansion adhesive tape comprises an expansion film, a first adhesive layer, a base film and a second adhesive layer which are sequentially compounded, the second adhesive layer comprises a gluing area and a blank area which are arranged at an interval in the width direction of the composite expansion adhesive tape; the gluing area contains a color developing material, so that color contrast is formed between the gluing area and the blank area; glue for forming the first adhesive layer is transparent polyacrylate glue, and the transparent polyacrylate glue comprises 45%-55% of polyacrylate, 0.04%-0.07% of a curing agent, 0.1%-0.3% of amino resin and p-toluenesulfonic acid. The adhesive tape provided by the invention has the advantages of being capable of realizing automatic rubberizing, easy to unroll and capable of reducing the difficulty of industrial production.

Description

Technical field [0001] The present invention belongs to the technical field of lithium battery, and more particularly to a composite expansion tape which is easy to unconflexible and the preparation method thereof. Background technique [0002] There is a gap between the bare core and the housing in the cylindrical lithium battery, and in the case of frequent use frequent vibration and shaking everyday, it is easy to cause the lithium battery and the bare core and the housing to cause the electrode sheet damage, the battery short circuit, Resistance increases. It is usually used to bond the lithium battery bone and housing by expanded tape to fill the gap in the cylindrical lithium battery to enhance its anti-vibration and shaking properties. Patent CN 11646505A discloses a high temperature resistant composite expansion film, but is a transparent or solid color tape, which cannot achieve automatic precision gelatin in the gelatin process, and the glue process is complicated. And ...

Claims

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Application Information

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IPC IPC(8): C09J7/29C09J133/04C09J161/20C09J11/08C09J11/06C08L25/06C08L51/04C08K3/36
Inventor 冯穗冠王升褚宬成陈鹏
Owner DONGGUAN AOZON ELECTRONICS MATERIAL
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