Seal member and method for manufacturing seal member

A sealing member with a PTFE base and alumina-filled porous structure, combined with an organosilicon compound coating, addresses the issue of polymerizable monomer penetration and polymerization, ensuring long-term durability and functionality.

JP2025102169APending Publication Date: 2025-07-08CANON KK
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Patent Information

Application Number
JP2023219456
Authority / Receiving Office
JP · JP
Patent Type
Applications
Current Assignee / Owner
Filing Date
2023-12-26
Publication Date
2025-07-08

AI Technical Summary

Technical Problem

Sealing members used for pipes and devices that come into contact with polymerizable monomers suffer from polymerizable monomer penetration and subsequent polymerization within the seal member, leading to damage and blockage, which existing materials like PTFE and silicone-coated PTFE fail to prevent effectively.

Method used

A sealing member with a polytetrafluoroethylene base material containing alumina particles in its porous structure and a coating layer made of an organosilicon compound condensate is used, which prevents polymerizable monomer intrusion by forming a three-dimensional network structure.

Benefits of technology

The sealing member maintains excellent mechanical properties while effectively preventing polymerizable monomer penetration and polymerization over an extended period, reducing damage and blockage.

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Abstract

To provide a seal member that has excellent mechanical characteristics as a seal member, and, even in a piping or a device where polymerizable monomer contacts, is capable of preventing breaking of a seal member for a long period of time, and polymerization of polymerizable monomer inside the seal member.SOLUTION: A seal member has a substrate and a coating layer formed on the substrate surface, where the substrate has a structure that alumina particles are present in gap parts of a polytetrafluoroethylene base body having a porous structure, and the coating layer is a layer of a condensate of an organic silicon compound.SELECTED DRAWING: None
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Citation Information

Patent Citations

  • Flex-resistant composite elastomer composition

    JP2002502735A

  • Fluororesin-made gasket for piping seal

    JP2014196779A