Method for producing modified molded article of fluororesin
US-2017260344-A1 · Sep 14, 2017 · US
Molded article and manufacturing method for molded article
US11826975B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11826975-B2 |
| Application number | US-201716325327-A |
| Country | US |
| Kind code | B2 |
| Filing date | Aug 10, 2017 |
| Priority date | Aug 16, 2016 |
| Publication date | Nov 28, 2023 |
| Grant date | Nov 28, 2023 |
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- Title
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Abstract
Official abstract text for this publication.
The invention provides a molded article containing a specific fluororesin and having excellent hydrophilicity. The molded article containing the fluororesin has a melt flow rate of 1.00 g/10 min or lower and a water contact angle of 90° or smaller. The fluororesin contains at least one copolymer selected from the group consisting of a copolymer containing a tetrafluoroethylene unit and a perfluoro(alkylvinylether) unit and a copolymer containing a tetrafluoroethylene unit and a hexafluoropropylene unit.
First claim
Opening claim text (preview).
The invention claimed is: 1. A molded article comprising a fluororesin, a surface of the molded article having a water contact angle of 90° or smaller, the fluororesin containing at least one copolymer selected from the group consisting of a copolymer containing a tetrafluoroethylene unit and a perfluoro(alkylvinylether) unit and a copolymer containing a tetrafluoroethylene unit and a hexafluoropropylene unit, and the whole of the molded article having a melt flow rate of 0.20 g/10 min or lower, the molded article is obtained by molding the fluororesin to provide an untreated molded article and irradiating the untreated molded article at a temperature of 110° C. to 240° C. in the presence of air. 2. The molded article according to claim 1 , wherein the molded article contains 100 to 1000 functional groups on at least a surface thereof per 10 6 carbon atoms in a main chain, and the functional groups include a —OH group, a —COF group, and a —COOH group. 3. The molded article according to claim 1 , wherein the molded article is a tube. 4. A method for manufacturing the molded article according to claim 1 , the method comprising: molding a fluororesin to provide an untreated molded article; and irradiating the untreated molded article with 40 to 100 kGy of radiation at 110° C. to 240° C. in the presence of air, the fluororesin containing at least one copolymer selected from the group consisting of a copolymer containing a tetrafluoroethylene unit and a perfluoro(alkylvinylether) unit and a copolymer containing a tetrafluoroethylene unit and a hexafluoropropylene unit. 5. The method for manufacturing the molded article according to claim 4 , wherein the irradiation causes a melt flow rate increasing rate of 0% or lower. 6. The method for manufacturing the molded article according to claim 4 , wherein the radiation is an electron beam. 7. The method for manufacturing the molded article according to claim 4 , wherein the irradiation is performed at a temperature lower than a melting point of the fluororesin. 8. The method for manufacturing the molded article according to claim 4 , wherein the molded article is a tube. 9. The molded article according to claim 1 , wherein the whole of the molded article has a melt flow rate of <0.1 g/10 min.
Assignees
Inventors
Classifications
- B29D23/001Primary
Pipes; Pipe joints (pleated hoses B29D23/18) · CPC title
by wave energy or particle radiation {(B29C64/00, B29C71/04 take precedence)} · CPC title
with fluorinated vinyl ethers · CPC title
with fluorinated vinyl ethers · CPC title
- C08J7/123Primary
Treatment by wave energy or particle radiation (C08J7/18 takes precedence) · CPC title
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- What does patent US11826975B2 cover?
- The invention provides a molded article containing a specific fluororesin and having excellent hydrophilicity. The molded article containing the fluororesin has a melt flow rate of 1.00 g/10 min or lower and a water contact angle of 90° or smaller. The fluororesin contains at least one copolymer selected from the group consisting of a copolymer containing a tetrafluoroethylene unit and a perflu…
- Who is the assignee on this patent?
- Daikin Ind Ltd
- What technology area does this patent fall under?
- Primary CPC classification B29D23/001. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Tue Nov 28 2023 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 4 related publications on this page (citations in our corpus or others sharing the same primary CPC).