A membrane having a reacted network
A membrane with a reacted polyolefin layer addresses 'splittiness' by forming a crosslinked structure, improving strength and reducing tears, thus enhancing safety and functionality in battery separators and fabrics.
JP7880895B2Active Publication Date: 2026-06-26CELGARD LLC
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Patents
- Current Assignee / Owner
- CELGARD LLC
- Filing Date
- 2022-04-28
- Publication Date
- 2026-06-26
AI Technical Summary
Technical Problem
Existing dry films used in battery and fabric applications suffer from 'splittiness', leading to cracks or breaks that compromise safety and functionality.
Method used
A membrane comprising a dry porous layer formed by reacting a polyolefin with compounds having epoxy and carboxyl groups, which can be monolayer, dilayer, trilayer, or multilayer, and is produced through extrusion, stretching, and heat application to initiate a crosslinking reaction.
Benefits of technology
The membrane exhibits improved strength and reduced tearability, enhancing safety and barrier function in battery separators and fabric applications by minimizing cracks and breaks.
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Smart Images
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Abstract
Disclosed is a membrane having one or more dry porous layers comprising (1) a polyolefin and (2) a product formed by reacting two components, which may be a compound having one or more carboxy groups and a compound having one or more epoxy groups. The product may be a reactive network, a three-dimensional reactive network, or a crosslinked network. The resulting membrane has improved strength, reduced tearing, or both improved strength and reduced tearing. The membrane may be used in batteries, capacitors, HVAC, filter devices, or textiles. A method for making the membrane is also disclosed.
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