US5061561A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Yarn article comprising a tetrafluoroethylene polymer and a process for producing the same
Assignee: Asahi Kasei Corp
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Filing: 1989-07-21
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Granted: 1991-10-29
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Expires: 2009-07-21
Abstract
Abstract A yarn article comprising a tetrafluoroethylene polymer is disclosed which has a specific bulk density, a specific orientation degree in an axial direction and a specific crystallinity and exhibits specific peaks in the thermogram of differential scanning calorimetry. The yarn article has excellent tensile strength at break and excellent tensile modulus of elasticity as well as inertness to chemicals. Therefore, the yarn article of the present invention can advantageously be used as a material for producing a woven fabric, a knit, a rope and the like, particularly in the field where not only chemical resistance but also high tensile strength and high tensile modulus of elasticity are required.
Inventors
- 👤 Shigeki Katayama
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:55
CPC Classifications
D; D01; D01F; D01F6/00; D01F6/02; D01F6/08; D01F6/12; Y; Y10; Y10S; Y10S57/00; Y10S57/907; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2973; Y10T428/2975; Y10T428/298; Y10T428/31504; Y10T428/3154; Y10T428/31544
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
63 words
A non-porous yarn article comprising a tetrafluoroethylene polymer, which has a bulk density of 2.15 to 2.30, an orientation degree in an axial direction of 0.9 or more and a crystallinity of 85% or more and exhibits peaks at 345°±5° C. and 380°±5° C. in the thermogram of differential scanning calorimetry in the course of temperature elevation at a rate of 10° C./min.
Claim 2
Dependent Claim
63 words
A non-porous yarn article comprising a tetrafluoroethylene polymer, which has a bulk density of 2.15 to 2.30, an orientation degree in an axial direction of 0.9 or more and a crystallinity of 85% or more and exhibits peaks at 345°±5° C. and 380°±5° C. in the thermogram of differential scanning calorimetry in the course of temperature elevation at a rate of 10° C./min.
Claim 3
Dependent Claim
18 words
The yarn article according to claim 1, having a tensile modulus of elasticity of 200 g/d or more.
Claim 4
Dependent Claim
19 words
The yarn article according to claim 1, which is a monofilament having a fineness of 100 denier or less.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-10-28 | 1995-04-29 | 1995-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-10-28 | 1999-04-29 | 1999-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-10-28 | 2003-04-29 | 2003-10-29 | $7700.00 | Window Closed / Lapsed |