Tearable tube formed from fluororesin
US-2018281262-A1 · Oct 4, 2018 · US
Thermoplastic fluororesin tube
US11802199B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11802199-B2 |
| Application number | US-201816959976-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jul 5, 2018 |
| Priority date | Jan 4, 2018 |
| Publication date | Oct 31, 2023 |
| Grant date | Oct 31, 2023 |
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- Title
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- Abstract
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Abstract
Official abstract text for this publication.
There is provided a thermoplastic fluororesin tube that, during the production of a catheter, can prevent a gap or air bubbles from being formed in the connection part of the catheter, and can be suitably used for the production of a catheter. A thermoplastic fluororesin tube, the thermoplastic fluororesin tube having tearability in a longitudinal direction, wherein a thermal expansion coefficient in the longitudinal direction upon heating in a gaseous phase at a temperature of 100° C. for 5 minutes is 0% or more.
First claim
Opening claim text (preview).
The invention claimed is: 1. A method for producing a thermoplastic fluororesin tube comprising a tetrafluoroethylene-hexafluoropropylene-perfluoroalkyl vinyl ether copolymer (FEP), the thermoplastic fluororesin tube having tearability in a longitudinal direction, wherein a thermal expansion coefficient in the longitudinal direction upon heating in a gaseous phase at a temperature of 100° C. for 5 minutes is 0% or more, the method comprising the steps of: subjecting a thermoplastic fluororesin comprising a tetrafluoroethylene-hexafluoropropylene-perfluoroalkyl vinyl ether copolymer (FEP) to melt extrusion molding to obtain a raw tube of the thermoplastic fluororesin tube; and expanding an inner diameter of the raw tube while heating the raw tube to a temperature of from 110-135° C. 2. The method according to claim 1 , wherein the thermoplastic fluororesin further comprises a tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer (PFA). 3. The method according to claim 1 , wherein a heat shrinkage ratio of an inner diameter of the thermoplastic fluororesin tube, upon heating in a gaseous phase at a temperature of 200° C. for 5 minutes, is 51% or more. 4. The method according to claim 1 , wherein the thermal expansion coefficient in the longitudinal direction upon heating at a temperature of 100° C. for 5 minutes is 0 to 4%. 5. The method according to claim 1 , which comprises a weld line in the longitudinal direction. 6. The method according to claim 1 , wherein a tear strength of the thermoplastic fluororesin tube is 12 N/mm or less.
Assignees
Inventors
Classifications
by stretching tubes {(in general B29C55/22, B29C55/28)} · CPC title
- C08L27/20Primary
Homopolymers or copolymers of hexafluoropropene · CPC title
combined with shaping by orienting, stretching or shrinking, e.g. film blowing (B29C48/0017 takes precedence) · CPC title
Homopolymers or copolymers or tetrafluoroethene · CPC title
Making of catheters or other medical or surgical tubes · CPC title
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- What does patent US11802199B2 cover?
- There is provided a thermoplastic fluororesin tube that, during the production of a catheter, can prevent a gap or air bubbles from being formed in the connection part of the catheter, and can be suitably used for the production of a catheter. A thermoplastic fluororesin tube, the thermoplastic fluororesin tube having tearability in a longitudinal direction, wherein a thermal expansion coeffici…
- Who is the assignee on this patent?
- Gunze Kk
- What technology area does this patent fall under?
- Primary CPC classification C08L27/20. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Oct 31 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).