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Reactive type polyurethane hot melt adhesive for flexible packaging lithium ion battery edgefold

A polyurethane hot-melt adhesive and lithium-ion battery technology, which is applied in the field of polyurethane hot-melt adhesives, can solve problems such as insufficient adhesion between the side and the battery core body, weak adhesion between the side tape and the battery core body, and inconsistent adhesive tape positions , to achieve the effect of improving dimensional stability and safety performance, moderate opening time, and high peel strength

Inactive Publication Date: 2018-11-06
东莞华工佛塑新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a reactive polyurethane hot-melt adhesive for the folding of lithium-ion batteries in flexible packaging in view of the deficiencies in the prior art, aiming to solve the problem of sticking the side tape and the battery core body in the existing side insulation package. It is not firm, the tape sticking position is inconsistent, and even the side is missing glue and metal, the tape sticking effect is not good, and the consistency is poor; and the side is not firmly pasted to the battery cell body after the side shaping

Method used

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  • Reactive type polyurethane hot melt adhesive for flexible packaging lithium ion battery edgefold
  • Reactive type polyurethane hot melt adhesive for flexible packaging lithium ion battery edgefold
  • Reactive type polyurethane hot melt adhesive for flexible packaging lithium ion battery edgefold

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] This embodiment provides a reactive polyurethane hot-melt adhesive for folding lithium-ion batteries in flexible packaging. In terms of mass percentage, the hot-melt adhesive includes the following components:

[0031]

[0032] The preparation steps of this hot melt adhesive are as follows:

[0033] (1) Pretreatment: Add Dynacoll 7360, CMA-24, DL-2000D, EVA, and rosin resin into the reaction kettle, heat to 150°C and stir for 30 minutes, let the raw materials fully melt and mix evenly, then cool down to 110°C, and stir Under vacuum dehydration for 1.8 hours, then lower the temperature to 80°C;

[0034] (2) Preparation of isocyanate-terminated prepolymer: Take the measured 4,4'-diphenylmethane diisocyanate, preheat to 60°C, add to the reaction kettle and stir evenly, in N 2 The prepolymerization reaction was carried out at 100°C under protection for 140 minutes, and the NCO% content was detected to be 2.5% by di-n-butylamine titration method for sampling;

[0035] (...

Embodiment 2

[0038] This embodiment provides a reactive polyurethane hot-melt adhesive for folding lithium-ion batteries in flexible packaging. In terms of mass percentage, the hot-melt adhesive includes the following components:

[0039]

[0040] The preparation steps of this hot melt adhesive are as follows:

[0041] (1) Pretreatment: Add Dynacoll 7380, MX-2325, DL-1000D, polymethacrylate, α-methylstyrene pure monomer resin into the reaction kettle and heat to 160°C and stir for 40 minutes to fully melt the raw materials and Mix well, then cool down to 108°C, vacuum dehydrate under stirring for 1.6 hours, then cool down to 78°C;

[0042] (2) Preparation of isocyanate-terminated prepolymer: Take the measured 4,4'-diphenylmethane diisocyanate, preheat to 58°C, add to the reaction kettle and stir evenly, 2 The prepolymerization reaction was carried out at 98°C under protection for 130 minutes, and the NCO% content was detected to be 2.6% by di-n-butylamine titration method for sampling;...

Embodiment 3

[0046]

[0047]

[0048] The preparation steps of this hot melt adhesive are as follows:

[0049] (1) Pretreatment: Add Dynacoll 7250, ODX-218, XCP-2000N, DL-3000D, hydroxyl-terminated thermoplastic polyester, and terpene resin into the reactor and heat to 170°C and stir for 20 minutes to fully melt and mix the raw materials evenly. Then lower the temperature to 112°C, vacuum dehydrate for 1.9 hours under stirring, and then lower the temperature to 82°C;

[0050] (2) Preparation of isocyanate-terminated prepolymer: Take the measured 4,4'-diphenylmethane diisocyanate, preheat it to 62°C, add it into the reaction kettle and stir evenly, and carry out prepolymerization at 102°C under the protection of argon. The polyreaction was carried out for 145 minutes, and the NCO% content was detected to be 2.4% by di-n-butylamine titration method for sampling;

[0051] (3) Addition of additives: After the prepolymerization is completed, add the metered catalyst triethylenediamine, a...

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Abstract

The invention belongs to the technical field of polyurethane hot melt adhesives, in particular to a reactive type polyurethane hot melt adhesive for flexible packaging lithium ion battery edgefold. The hot melt adhesive comprises the following components by mass percentage: 20%-45% of polyester polyol; 10%-30% of polyether polyol; 10%-20% of tackifying resin; 10%-20% of a thermoplastic elastomer;13%-25% of diisocyanate; 0.1%-0.2% of a catalyst; 0.3%-2% of an antioxidant; and 0.01%-0.04% of a stabilizer; the hot melt adhesive prepared by the invention has a moderate opening time, facilitates the application of an adhesive to an aluminum-plastic composite film of a flexible packaging lithium ion polymer battery, is high in initial bond strength, high in peel strength to the bonded aluminum-plastic film, good in heat resistance after cured completely and good in thermal stability, does not flow at a high temperature of 170 DEG C, and has the important application value for improving thedimensional stability and the safety performance of lithium battery packaging.

Description

technical field [0001] The invention belongs to the technical field of polyurethane hot-melt adhesives, and in particular relates to a reactive polyurethane hot-melt adhesive for edge folding of lithium-ion batteries in flexible packaging. Background technique [0002] Lithium-ion polymer batteries have the advantages of high specific energy, many cycle times, and long storage time. They are not only widely used in portable electronic devices, but also the main development direction of large and medium-sized power battery devices for new energy vehicles. Lithium-ion batteries are usually called lithium batteries. At present, electronic products such as mobile phones, digital cameras, and power banks all need built-in lithium batteries as power sources, and the main power is supplied by polymer soft pack batteries. Before the lithium battery enters the market, in order to avoid short circuit, overcharge and overdischarge caused by improper use of the product during use, the b...

Claims

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Application Information

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IPC IPC(8): C09J175/04C08G18/40C08G18/48C08G18/42
CPCC08G18/4018C08G18/4213C08G18/4238C08G18/4825C08G18/4866C09J175/04
Inventor 陈海丰马志安邹明清黎艳飞
Owner 东莞华工佛塑新材料有限公司
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