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Single-sided hot-melt ultrathin termination adhesive tape for lithium battery and preparation method of single-sided hot-melt ultrathin termination adhesive tape

A technology for terminating tapes and lithium batteries, applied in the direction of adhesives, pressure-sensitive films/sheets, film/sheet release coatings, etc. problem, to achieve the effect of shielding penetration and excellent resistance to electrolyte aging.

Active Publication Date: 2022-03-11
YANTAI DARBOND TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing solution is to use hot-melt adhesive tape to fix the inner surface of the lithium battery cell and the outer packaging aluminum-plastic film. The Chinese invention patent CN104610883 discloses that polyethylene terephthalate is used as the base material and coated with synthetic rubber Ethylene-isoprene-styrene copolymer (SIS), low-molecular-weight polyolefin rubber, and petroleum resin rubber-type pressure-sensitive adhesives are cross-linked with initiators, and the tapes made have the following disadvantages: (1) tapes The overall thickness is thicker, which affects the energy density of lithium batteries to a certain extent; (2) Use polyethylene terephthalate (PET) as the tape base material, and after bonding under a certain temperature and pressure, it is resistant to electrolyte sticking Poor connection performance, which has potential impact on battery performance and safety

Method used

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  • Single-sided hot-melt ultrathin termination adhesive tape for lithium battery and preparation method of single-sided hot-melt ultrathin termination adhesive tape
  • Single-sided hot-melt ultrathin termination adhesive tape for lithium battery and preparation method of single-sided hot-melt ultrathin termination adhesive tape
  • Single-sided hot-melt ultrathin termination adhesive tape for lithium battery and preparation method of single-sided hot-melt ultrathin termination adhesive tape

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A single-sided hot-melt ultra-thin termination tape for lithium batteries, with a total thickness of 12um, including a first pressure-sensitive adhesive layer and a second substrate layer arranged in sequence from top to bottom;

[0026] The coating thickness of the first pressure-sensitive adhesive layer is 4 μm, and includes the following components in parts by weight:

[0027] Hydrogenated styrene block copolymer SEBS G1654 (Kraton) 35 parts, amorphous α-olefin copolymer Vestoplast 408 (Evonik) 25 parts, hydrogenated petroleum resin ARKON P90 (Arakawa) 20 parts, modified terpene resin 5 parts, 14 parts of oxidized polyethylene wax; 1 part of antioxidant Irganox 1010;

[0028] The second substrate layer is a specially treated PET film with a thickness of 8 μm. Among them, 2 parts of green pigment, 38 parts of amorphous α-olefin copolymer, 60 parts of modified terpene resin, mixed uniformly to form green glue; one side of 6um PET film was corona treated, and the coron...

Embodiment 2

[0030] A single-sided hot-melt ultra-thin termination tape for lithium batteries, with a total thickness of 8um, including a first pressure-sensitive adhesive layer and a second substrate layer arranged in sequence from top to bottom;

[0031] The coating thickness of the first pressure-sensitive adhesive layer is 2 μm, and includes the following components in parts by weight:

[0032] Hydrogenated styrene block copolymer SEBS G1654 (Kraton) 30 parts, amorphous α-olefin copolymer Vestoplast 408 (Evonik) 30 parts, hydrogenated petroleum resin ARKON P90 (Arakawa) 20 parts, modified terpene resin 10 parts, 9 parts of oxidized polyethylene wax; 1 part of antioxidant Irganox 1010;

[0033] The second substrate layer is a specially treated PET film with a thickness of 6 μm. Among them, there are 2 parts of green pigment, 48 parts of amorphous α-olefin copolymer, and 50 parts of modified terpene resin, which are mixed evenly to form green glue; one side of the 4um PET film is corona...

Embodiment 3

[0035] A single-sided hot-melt ultra-thin termination tape for lithium batteries, with a total thickness of 12um, including a first pressure-sensitive adhesive layer and a second substrate layer arranged in sequence from top to bottom;

[0036] The coating thickness of the first pressure-sensitive adhesive layer is 6 μm, and includes the following components in parts by weight:

[0037] Hydrogenated styrene block copolymer SEBS G1654 (Kraton) 30 parts, amorphous α-olefin copolymer Vestoplast 408 (Evonik) 30 parts, hydrogenated petroleum resin ARKON P90 (Arakawa) 20 parts, modified terpene resin 10 parts, 9 parts of oxidized polyethylene wax; 1 part of antioxidant Irganox 1010;

[0038]The second substrate layer is a PET film with a thickness of 6 μm. The film is only corona treated, and the corona treatment is performed on one side of the 6um PET film, and the corona intensity is controlled at about 1-2.

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Abstract

The single-sided hot-melt ultrathin termination adhesive tape comprises a first pressure-sensitive adhesive layer and a second base material layer which are sequentially arranged from top to bottom, the first pressure-sensitive adhesive layer has viscosity at normal temperature and is used for bonding the outer surface of a lithium battery cell, and the second base material layer is a base material layer of which the surface is specially treated; the total thickness of the single-sided hot melt adhesive tape for the lithium battery is 8-12 microns; according to the adhesive tape, modified terpene resin is introduced into the first sensitive adhesive layer, the first sensitive adhesive layer can have good initial adhesion and adhesion performance after electrolyte aging resistance, the second base material layer can provide a good color, meanwhile, electrolyte permeation can be shielded to a certain degree, a glue adhesion place is provided, and finally the adhesive tape has excellent electrolyte aging resistance.

Description

technical field [0001] The invention relates to a single-sided hot-melt ultra-thin adhesive tape for lithium batteries and a preparation method thereof, belonging to the technical field of adhesives. Background technique [0002] Lithium-ion battery is a kind of rechargeable battery. Due to its high working voltage, small size, light weight, high energy, no memory effect, small self-discharge, and long cycle life, it is widely used in portable fields such as mobile phones and notebooks. In addition, since lithium-ion batteries do not contain heavy metal chromium, compared with nickel-chromium batteries, the pollution to the environment is greatly reduced. [0003] With the development of science and technology, the requirements for lithium batteries in various application fields are getting higher and higher, especially the trend of high energy density and lightweight, and the anti-drop performance of lithium batteries determines the stability and safety of lithium batteries...

Claims

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Application Information

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IPC IPC(8): C09J153/02C09J123/00C09J157/02C09J11/08C09J11/06C09J7/38C09J7/25C09J7/50
CPCC09J153/025C09J123/00C09J11/08C09J11/06C09J7/387C09J7/25C09J7/50C09J2203/33C09J2301/122C09J2301/302C09J2467/006C09J2453/00C09J2423/003C08L23/00C08L57/02C08L45/00C08L23/30C08K5/1345Y02E60/10
Inventor 李龙王建斌陈田安
Owner YANTAI DARBOND TECH
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