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High-temperature-resistant tab film and preparation method thereof

A technology of ear glue and high temperature resistance, which is applied in the direction of adhesives, grafted polymer adhesives, adhesive types, etc., can solve the problems of high equipment requirements and the diversification of color of ear glue for customers, and achieve the goal of preparation Simple method, excellent electrolyte resistance, and the effect of improving bonding performance

Pending Publication Date: 2021-11-23
江阴苏达汇诚复合材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The invention patent with the authorized notification number CN102208576B provides a kind of ear glue and its preparation method. A three-layer co-extrusion method is used to prepare the ear glue with the structure of the surface film layer / intermediate film layer / surface film layer. The surface film layer Using uncrosslinked polyolefin as raw material, the intermediate film layer is made of crosslinked polyolefin or a mixture of polyolefin, crosslinking agent, co-crosslinking agent and antioxidant, so that the prepared ear glue can withstand long-term electrolyte immersion No delamination, no deformation during heat sealing, but this production process has high requirements on equipment, especially for high-temperature-resistant ear glue, and it does not solve the customer's demand for diversified colors of ear glue

Method used

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  • High-temperature-resistant tab film and preparation method thereof
  • High-temperature-resistant tab film and preparation method thereof

Examples

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preparation example Construction

[0044] The present invention also provides a preparation method for the above-mentioned high-temperature-resistant ear glue, comprising the following steps:

[0045] S1. Preparation of MPP membrane

[0046] The raw materials are added into the hoppers of the extruder in the order of modified PP layer, homopolymerized PP layer and copolymerized PP layer by casting process, extruded and formed, and the outer side of the copolymerized PP layer is subjected to corona treatment to obtain MPP film , prepare 2 parts of MPP membrane for use;

[0047] Among them, the parameters of the casting process are: the melting temperature is 200-260° C., the cooling temperature is 10-40° C., and the traction ratio is (1-2):1.

[0048] Here, the blown film process can also be used instead of the tape casting process to prepare the MPP film. The parameters of the blown film process are: the melting temperature is 200-260°C, the cooling temperature is 10-40°C, and the inflation ratio is (1-3): 1....

Embodiment 1

[0053] A kind of high temperature resistant ear glue, comprising PET layer, the glue layer that is arranged on both sides of PET layer, and the MPP layer that is arranged on the outside of glue layer, total thickness is 100um; Wherein, described PET layer, glue layer and MPP layer The thicknesses are 10um, 2um, and 43um respectively; the MPP layer is a three-layer structure, which is a modified PP layer, a homopolymerized PP layer and a corona-treated copolymerized PP layer from the outside to the inside, and the thickness ratio is 1:2: 1.

Embodiment 2

[0055] Compared with Example 1, the only difference is that the thicknesses of the PET layer, glue layer and MPP layer are 20um, 3.5um, and 36.5um respectively; the rest are the same as in Example 1.

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Abstract

The invention relates to the technical field of tab films, in particular to a high-temperature-resistant tab film and a preparation method thereof. The tab film prepared by adopting a dry-method compounding process comprises a PET layer, glue layers arranged on the two sides of the PET layer, and MPP layers arranged on the outer sides of the glue layers, wherein the MPP layer is of a three-layer structure and sequentially comprises a modified PP layer, a homopolymerized PP layer and a copolymerized PP layer subjected to corona treatment from outside to inside. The tab film disclosed by the invention has excellent high temperature resistance and electrolyte resistance, is simple in preparation process and low in investment cost, and can be produced according to color requirements of customers.

Description

technical field [0001] The invention relates to the technical field of ear glue, in particular to a high temperature resistant ear glue and a preparation method thereof. Background technique [0002] Tab glue is a material widely used in the field of lithium-ion batteries. The main function of the tab glue is to adhere to the tab of the lithium-ion battery, so that the tab of the lithium-ion battery has the performance of heat sealing with the PP layer (polypropylene layer) of the aluminum-plastic film. Ear glue is essentially a non-adhesive film, which completely depends on temperature and time control to make it fuse. [0003] At present, most of the ear glues on the market are single-layer or three-layer ear glue. Among them, the single-layer ear glue is generally made of polypropylene material, which is in a molten state when it is sealed by high-temperature heat-pressing, and has a certain fluidity, which often causes short circuit or leakage problems due to the conta...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J7/25C09J7/30C09J151/06C09J123/12C09J123/14H01M50/534
CPCC09J7/255C09J7/30C09J151/06C09J123/12C09J123/14C09J2467/006C09J2451/00C09J2423/10C09J2203/33
Inventor 周婷梁昌盛晁承鹏
Owner 江阴苏达汇诚复合材料有限公司
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