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Antiflaming aluminum plastic film and preparation method thereof

A technology of aluminum-plastic film and flame retardant, which is applied in the field of aluminum-plastic film, can solve the problem of reducing the strength of the bonding layer, the mechanical properties of the aluminum-plastic film, the incompatibility of the flame retardant and the material of the bonding layer, and affecting the aluminum-plastic film. interlayer bond strength etc.

Active Publication Date: 2019-05-31
桑顿新能源科技(长沙)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this method, 10%-60% volume fraction of flame retardant is added to the adhesive layer of aluminum-plastic film. On the other hand, due to the incompatibility between the flame retardant and the adhesive layer material, the flame retardant and the adhesive layer will be phase separated during the long-term use of the battery, resulting in retardation. The fuel is precipitated from the adhesive layer, which seriously affects the interlayer bonding strength between the layers of the aluminum-plastic film, and eventually leads to package failure, posing a great safety hazard
[0005] The existing aluminum-plastic film is easy to burn. Once the lithium-ion battery short-circuits and generates heat, the battery wrapped by the aluminum-plastic film is very likely to burn or even explode.

Method used

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  • Antiflaming aluminum plastic film and preparation method thereof
  • Antiflaming aluminum plastic film and preparation method thereof
  • Antiflaming aluminum plastic film and preparation method thereof

Examples

Experimental program
Comparison scheme
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preparation example Construction

[0045] A method for preparing a flame-retardant aluminum-plastic film, the method comprising:

[0046] Preparation of flame retardant modified nylon layer:

[0047] Add 0.5-2 parts by mass of reactive flame retardant, 0.1-0.5 parts by mass of absolute ethanol and 0.5-2 parts by mass of deionized water into a three-necked flask, stir fully in an oil bath environment at 60-100°C, and slowly drop Add 0.01-0.05 parts by mass of hexamethylenediamine-ethanol solution, and react at a constant temperature for 2-4 hours; after the reaction, filter the reaction product with suction, and vacuum-dry the obtained solid product at 60-80°C for 12-24 hours to obtain a flame retardant salt ,spare;

[0048] Mix 0.3-2.3 parts by mass of flame retardant salt with 4.2-7.7 parts by mass of nylon salt, add 0.4-1.7 parts by mass of deionized water to the mixed salt, and adjust its pH value to 7.5-8; add 0.05-0.5 parts by mass of sodium hypophosphite to the mixed solution as a catalyst, mix well and...

Embodiment 1

[0058] 1. Preparation of surface flame retardant modified nylon layer

[0059] 1.1 Synthesis of flame retardant salt

[0060] Add 0.05 parts by mass of reactive flame retardant 2,2-bis((4-phenoxyphenylphosphine oxide)-p-aminobenzoic acid) propane (BPOAP), 0.13 parts by mass of absolute ethanol and 1 mass part 0.05 parts by mass of hexamethylenediamine-ethanol solution (hexamethylenediamine volume concentration: 5%) was slowly dropped into the above solution, and reacted at constant temperature for 2 hours. After the reaction, the reaction product was filtered with suction, and the obtained solid product was vacuum-dried at 80° C. for 12 hours for future use.

[0061] 1.2 Synthesis of flame retardant modified nylon layer

[0062] 1.2.1 Weigh 1 part by mass of the flame retardant BPOAP salt prepared in step 1 and mix it with 6.8 parts by mass of nylon 66 salt (intermediate product of nylon 66 synthesis, non-polymeric state), and add 1.2 parts by mass of Deionized water, and a...

Embodiment 2

[0079] The difference from Example 1 is that the composition of the flame-retardant modified CPP layer is different, and the mass and number ratio of PP, intumescent flame retardant (PEPA:MPP=11:9 (wt%)) and compatibilizer in step 2.1 Be 10:3:0.05, all the other parameters are identical with embodiment 1.

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Abstract

The invention relates to the field of lithium batteries, and discloses an antiflaming aluminum plastic film and a preparation method thereof. The aluminum plastic film comprises an antiflaming modified nylon layer as a surface layer, an aluminum layer and an antiflaming modified CPP heat sealing layer as an inner layer; the antiflaming modified nylon layer as the surface layer, the aluminum layerand the antiflaming modified CPP heat sealing layer as the inner layer successively bond with one another through a bonding agent. The aluminum plastic film achieves a quite good antiflaming effect, and the safety performance of a lithium ion battery is greatly improved.

Description

technical field [0001] The invention relates to the technical field of aluminum-plastic films, in particular to a flame-retardant aluminum-plastic film and a preparation method thereof. Background technique [0002] In recent years, with the rapid development of portable electronic products, electric vehicles, and energy storage power stations, lithium-ion batteries have become the preferred chemical power sources due to their high energy density, high operating voltage, small self-discharge, and long cycle life. With the upgrading of products, people have higher and higher requirements for the energy density of lithium-ion batteries, but the safety performance has not been upgraded simultaneously. In actual use, safety accidents occur from time to time, mainly because lithium-ion batteries are exposed to high During the process of falling, shrinkage and embrittlement of the diaphragm, the contact short circuit of the cathode and the anode will cause thermal runaway, which w...

Claims

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Application Information

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IPC IPC(8): B32B15/088B32B15/20B32B27/06B32B27/34B32B27/32B32B7/12B32B27/20B32B33/00C08L23/12C08L83/04C08K5/521C08K5/3492C08K5/5397C08L77/06
Inventor 李景夫易四勇林琳任超林洋
Owner 桑顿新能源科技(长沙)有限公司
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