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High-temperature-resistant and easy-to-unroll composite expansion adhesive tape, and preparation method and application thereof

A high temperature resistant and unwinding technology, which is applied in the direction of film/sheet adhesives, adhesives, electrical components, etc., can solve the problems of increased lateral shrinkage and folding thickness, inability to fully apply shrinkage, and low temperature resistance of tapes. Achieve the effects of avoiding electrolyte leakage, improving shrinkage resistance, temperature resistance and smoothness

Pending Publication Date: 2022-01-21
DONGGUAN AOZON ELECTRONICS MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Patent CN111995957A discloses a high expansion ratio oriented polystyrene swelling tape and its preparation method, which is composed of a single-sided release oriented polystyrene film substrate and an acrylate adhesive layer. The tape is easy to shrink laterally when heated, and the thickness of the fold increases, and it can absorb a large amount of solvent in the electrolyte to cause three-dimensional swelling. This technology tape has low temperature resistance, and it will shrink when there is a high temperature in the production process of the battery manufacturer. It cannot be fully applied.
In addition, although the currently used expansion tape can achieve high-rate expansion in the electrolyte, it is difficult to unwind it during use, which causes great inconvenience to industrial production.

Method used

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  • High-temperature-resistant and easy-to-unroll composite expansion adhesive tape, and preparation method and application thereof
  • High-temperature-resistant and easy-to-unroll composite expansion adhesive tape, and preparation method and application thereof
  • High-temperature-resistant and easy-to-unroll composite expansion adhesive tape, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] A high-temperature-resistant and easy-to-unwind composite expansion tape, comprising a first adhesive layer (4 μm), a temperature-resistant layer (6 μm), a second adhesive layer (4 μm) and a base layer (40 μm), wherein the base layer is oriented Polystyrene membrane.

[0043] The material of the oriented polystyrene film includes 88% of general-purpose polystyrene (GPPS), 6% of high-impact polystyrene (HIPS), and 2% of nanometer silicon dioxide, calculated by weight percentage. The above material constituting the oriented polystyrene film can be obtained through melt extrusion, extrusion molding, and then transverse and longitudinal stretching; the transverse stretching ratio is 3 to 5 times; the longitudinal stretching ratio is 2 to 3 times.

[0044]The composition of the polyacrylate glue forming the adhesive layer includes: 45% polyacrylate, 0.1% 1,6-isocyanate, and the balance is ethyl solvent.

[0045] The specific preparation steps of the high temperature-resista...

Embodiment 2

[0051] A high-temperature-resistant and easy-to-unwind composite expansion tape, comprising a first adhesive layer (2 μm), a temperature-resistant layer (4 μm), a second adhesive layer (2 μm) and a base layer (50 μm) arranged in sequence, wherein the base layer is oriented Polystyrene membrane.

[0052] The materials of the oriented polystyrene film include 85% of general-purpose polystyrene (GPPS), 5% of high-impact polystyrene (HIPS), and 2.3% of nanometer silicon dioxide, calculated by weight percentage.

[0053] The composition of the adhesive layer glue and the production steps of the adhesive tape are the same as in Example 1.

Embodiment 3

[0055] A high-temperature-resistant and easy-to-unwind composite expansion tape, including a first adhesive layer (6 μm), a temperature-resistant layer (10 μm), a second adhesive layer (6 μm) and a base layer (60 μm) arranged in sequence, wherein the base layer is oriented Polystyrene membrane.

[0056] The material of the oriented polystyrene film includes 90% of general-purpose polystyrene (GPPS), 8% of high-impact polystyrene (HIPS), and 0.9% of nano-silicon dioxide, calculated by weight percentage.

[0057] The composition of the adhesive layer glue and the production steps of the adhesive tape are the same as in Example 1.

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Abstract

The invention provides a high-temperature-resistant and easy-to-unroll composite expansion adhesive tape. The composite expansion adhesive tape comprises a base layer and an adhesive layer which are compounded with each other, and the adhesive layer comprises a temperature-resistant layer; and the base layer is an oriented polystyrene film, and the oriented polystyrene film is prepared from, by weight, 85-90% of general polystyrene, 5-8% of high-impact polystyrene and 0.9-2.3% of nano silicon dioxide. The composite expansion adhesive tape provided by the invention has high expansion rate, can be kept not shrunk at high temperature, and is easy to uncoil in industrial production.

Description

technical field [0001] The invention belongs to the technical field of lithium batteries, and in particular relates to a high-temperature-resistant and easy-to-unwind composite expansion tape, a preparation method and application thereof. Background technique [0002] Cylindrical lithium batteries have been widely used in production due to their mature manufacturing process, high degree of automation, and convenience for standardized production. When it should be used in daily equipment, it often shakes and vibrates frequently during use, and there is a certain gap between the bare cell of the cylindrical lithium battery and the cylindrical shell. Shaking and vibration can easily cause the relative movement of the bare cell and the shell of the lithium battery, resulting in damage to the electrode sheet, short circuit of the battery, increase in resistance, etc., which affects the performance of the lithium battery and also poses a great safety hazard. [0003] In order to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J7/29C09J7/40C09J133/00C08L25/06C08L51/04C08K7/26H01M50/242
CPCC09J7/29C09J7/405C09J133/00H01M50/242C09J2301/122C09J2301/16C09J2467/006C09J2425/006C09J2301/41C09J2203/33Y02E60/10
Inventor 冯穗冠王升褚宬成陈鹏
Owner DONGGUAN AOZON ELECTRONICS MATERIAL
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