Modified CPP thin film used for lithium battery flexible packaging film

A flexible packaging film, lithium battery technology, applied in packaging, wrapping paper, transportation and packaging, etc., can solve the problems of corrosion resistance, puncture resistance, outer layer material corrosion, battery scrapping and other problems of lithium batteries without packaging, and achieve excellent high temperature resistance. Performance and mechanical properties, improve performance, enhance the effect of acid and alkali resistance

Active Publication Date: 2020-01-17
JIESHOU CITY TIANHONG PACKAGING MATERIAL
View PDF5 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, there are burrs on the copper mesh and aluminum mesh around the lithium-ion battery core. During the vacuuming operation of the package, the soft packaging film shrinks, and the burrs will puncture the inner membrane. If the inner membrane is pierced, the hydrofluoric acid in t

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Modified CPP thin film used for lithium battery flexible packaging film
  • Modified CPP thin film used for lithium battery flexible packaging film
  • Modified CPP thin film used for lithium battery flexible packaging film

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0038] Example one

[0039] A modified CPP film for lithium battery flexible packaging film, composed of three thin resin layers, from bottom to top, layer A, layer B, and layer C. The weight percentage of the three layers of A, B, and C is 15%. 70%, 15%.

[0040] The A layer is composed of 90% ternary copolymer polypropylene, 5% crosslinking monomer, 0.2% initiator, and 4.8% graphene by weight;

[0041] The composition of layer B in weight percentage: homopolypropylene 90%, crosslinking monomer 5%, initiator 0.2%, novolac epoxy vinyl ester resin 1%, graphene 3.8%, novolac epoxy vinyl ester resin to phenolic resin , Epichlorohydrin and methoxy acrylic acid as raw materials;

[0042] C layer weight percentage composition: mixed polypropylene 90%, crosslinking monomer 5%, initiator 0.2%, graphene 4.8%, mixed polypropylene is composed of 20% ternary polypropylene and 80% homopolypropylene. .

[0043] The preparation method of modified CPP film is as follows:

[0044] S1: A, B, C three la...

Example Embodiment

[0057] Example two

[0058] A modified CPP film for lithium battery flexible packaging film, composed of three thin resin layers, from bottom to top, layer A, layer B, and layer C. The weight percentage of the three layers of A, B, and C is 20%. 60%, 20%.

[0059] The composition of A layer in weight percentage: 87% ternary copolymer polypropylene, 8% crosslinking monomer, 0.5% initiator, 4.5% graphene;

[0060] The composition of layer B in weight percentage: homopolypropylene 85%, crosslinking monomer 8%, initiator 0.5%, novolac epoxy vinyl ester resin 3%, graphene 3.5%, novolac epoxy vinyl ester resin to phenolic resin , Epichlorohydrin and methoxy acrylic acid as raw materials;

[0061] C layer weight percentage composition: mixed polypropylene 87%, crosslinking monomer 8%, initiator 0.5%, graphene 4.5%, mixed polypropylene consists of 10% binary polypropylene, 20% ternary polypropylene and Composed of 70% homopolymer polypropylene.

[0062] The preparation method of the modified...

Example Embodiment

[0068] Example three

[0069] A modified CPP film for lithium battery flexible packaging film, composed of three thin resin layers, from bottom to top, layer A, layer B, and layer C. The weight percentage of the three layers of A, B, and C is 15%. 70%, 15%.

[0070] The composition of layer A in weight percentage: ternary copolymer polypropylene 84%, crosslinking monomer 10%, initiator 1%, graphene 5%;

[0071] The composition of layer B in weight percentage: homopolypropylene 79%, crosslinking monomer 10%, initiator 1%, novolac epoxy vinyl ester resin 5%, graphene 5%, novolac epoxy vinyl ester resin to phenolic resin , Epichlorohydrin and methoxy acrylic acid as raw materials;

[0072] The composition of layer C by weight percentage: mixed polypropylene 84%, crosslinking monomer 10%, initiator 1%, graphene 5%. The mixed polypropylene is composed of 20% binary polypropylene, 40% ternary polypropylene and 40% homopolypropylene.

[0073] The preparation method of the modified CPP film ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a modified CPP thin film used for a lithium battery flexible packaging film. The thin film is made through three-layer co-extrusion, flow coating roller cooling shaping, automatic thickness measuring adjusting, corona processing, side cutting winding and slitting operation. Ternary polymerization polypropylene, homo-polypropylene and mixed polypropylene serve as base materials, a crosslinking monomer and an initiating agent are added into all layers of polypropylene, an extruding machine is used for enabling the polypropylene to have a mico-crosslinking reaction with the crosslinking monomer and the initiating agent, through the method, the thin film can effectively improve corrosion resistance, composite tightness between film layers can be improved, through addingof novolac epoxy vinyl ester resin, corrosion resistance can reach the degree of lithium battery electrolyte resisting, graphene is added, reduction of composite system strength due to adding of thecrosslinking monomer and the novolac epoxy vinyl ester resin can be relieved, and the requirements of the CPP film for a lithium battery to puncture resistance and impact resistance can be effectivelyachieved.

Description

technical field [0001] The invention relates to the field of polymer materials, in particular to a modified CPP film used for lithium battery flexible packaging films. Background technique [0002] CPP film is cast polypropylene film, which is a polypropylene film produced by casting process. According to different uses, it can be divided into general CPP film, aluminized grade CPP film and cooking grade CPP film, etc. Due to the advantages of good transparency, high gloss, strong moisture resistance, high heat resistance, and easy heat sealing, it is widely used in the market, especially for food packaging. [0003] In recent years, with the development of the microelectronics industry, CPP films have begun to be used in the inner layer of flexible packaging for lithium-ion batteries. The electrolyte of lithium batteries contains a variety of organic solvents. Organic solvents usually swell, dissolve, and absorb flexible packaging materials, especially the inner layer mate...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): B65D65/40B65H18/10B65H18/02C08L23/14C08L23/12C08L63/10C08K3/04C08J5/18B29C48/08B29C48/21B29C48/00B29C69/00B29L7/00
CPCB29C69/001B29L2007/00B65D65/40B65H18/028B65H18/10B65H2701/1944B29C48/0022B29C48/08B29C48/21C08J5/18C08J2323/12C08J2323/14C08J2463/10C08K3/042
Inventor 胡伟李汪洋吴磊周正发任凤梅张伟孙晓华徐凤锦刘志强王若愚张德顺郭浩
Owner JIESHOU CITY TIANHONG PACKAGING MATERIAL
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap