Molded article and manufacturing method for molded article
US-11826975-B2 · Nov 28, 2023 · US
Member to be compressed for electrochemical devices
US12312427B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-12312427-B2 |
| Application number | US-202017599086-A |
| Country | US |
| Kind code | B2 |
| Filing date | Apr 3, 2020 |
| Priority date | Apr 5, 2019 |
| Publication date | May 27, 2025 |
| Grant date | May 27, 2025 |
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- Title
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Abstract
Official abstract text for this publication.
A member to be compressed for an electrochemical device, including a copolymer containing a tetrafluoroethylene unit and a fluoroalkyl vinyl ether unit, the copolymer having a content of the fluoroalkyl vinyl ether unit based on all the monomer units of the copolymer of 4.3% by mass or more and less than 5.5% by mass, and having a melt flow rate of 10 to 23 g/10 min.
First claim
Opening claim text (preview).
The invention claimed is: 1. A sealing member to be compressed for an electrochemical device, comprising a copolymer comprising a tetrafluoroethylene unit and a fluoroalkyl vinyl ether unit, the copolymer having a content of the fluoroalkyl vinyl ether unit based on all the monomer units of the copolymer of 4.5% by mass or more and 4.7% by mass or less, and having a melt flow rate of 10 to 23 g/10 min, wherein the copolymer has a compression set of 85% or less, the compression set being measured after the copolymer in a state of being compression-deformed at a compression deformation rate of 50% is retained at 40° C. for 1,000 hours. 2. The sealing member to be compressed for an electrochemical device according to claim 1 , wherein the fluoroalkyl vinyl ether unit is at least one selected from the group consisting of perfluoro (ethyl vinyl ether) unit and perfluoro (propyl vinyl ether) unit. 3. The sealing member to be compressed for an electrochemical device according to claim 1 , wherein the copolymer has a melting point of 305° C. or lower. 4. The sealing member to be compressed for an electrochemical device according to claim 1 , to be used in a state of being compression-deformed at a compression deformation rate of 30% or more. 5. The sealing member to be compressed for an electrochemical device according to claim 1 , to be used in an environment where the maximum temperature reaches 40° C. or higher. 6. The sealing member to be compressed for an electrochemical device according to claim 1 , wherein the sealing member is an injection-molded article. 7. The sealing member to be compressed for an electrochemical device according to claim 1 , wherein the sealing member is a member to be compressed for a battery.
Assignees
Inventors
Classifications
as weight or mass percentages · CPC title
Organic material · CPC title
Fluorocarbon polymers · CPC title
Monomers containing halogen · CPC title
Homopolymers or copolymers or tetrafluoroethene · CPC title
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Frequently asked questions
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- What does patent US12312427B2 cover?
- A member to be compressed for an electrochemical device, including a copolymer containing a tetrafluoroethylene unit and a fluoroalkyl vinyl ether unit, the copolymer having a content of the fluoroalkyl vinyl ether unit based on all the monomer units of the copolymer of 4.3% by mass or more and less than 5.5% by mass, and having a melt flow rate of 10 to 23 g/10 min.
- Who is the assignee on this patent?
- Daikin Ind Ltd
- What technology area does this patent fall under?
- Primary CPC classification C08F214/262. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue May 27 2025 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 9 related publications on this page (citations in our corpus or others sharing the same primary CPC).