US5075168A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyamide filament and process for producing the same
Assignee: Mitsubishi Chemical Corp
•
Filing: 1989-11-13
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Granted: 1991-12-24
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Expires: 2009-11-13
Abstract
Abstract Disclosed herein are a polyamide filament comprising a polyamide resin composition which comprises an aromatic polyamide resin (A) produced by polymerizing a monomer containing not less than 85 wt % of an aromatic polyamide component composed of terephthalic acid, isophthalic acid and aliphatic diamine, and an aliphatic polyamide resin (B), and having a heat-shrinkage in boiling water of not less than 20%, and a process for producing the same.
Inventors
- 👤 Seiichiro Maruyama
- 👤 Masami Tsunoda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 16:24
CPC Classifications
D; D01; D01F; D01F6/00; D01F6/88; D01F6/90; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2929
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
131 words
A polyamide filament comprising a mixture of aromatic and aliphatic polyamide resins, said mixture comprising an aromatic polyamide resin (A) produced by polymerizing a monomer mixture comprising not less than 85 wt % of an aromatic polyamide component composed of terephthalic acid, isophthalic acid and aliphatic diamine, and an aliphatic polyamide resin (B) selected from the group consisting of nylon 6 and a copolymer which is mainly composed of nylon 6, the ratio of said terephthalic acid to said isophthalic acid in said monomer mixture ranging from about 1:1.5 to 1:3 the ratio of said aromatic polyamide resin (A) to said aliphatic polyamide resin (B) in said mixture ranging from about 5:95 to about 50:50 by weight ratio; and said filament exhibiting heat-shrinkage in boiling water of not less than 20%.
Claim 2
Dependent Claim
131 words
A polyamide filament comprising a mixture of aromatic and aliphatic polyamide resins, said mixture comprising an aromatic polyamide resin (A) produced by polymerizing a monomer mixture comprising not less than 85 wt % of an aromatic polyamide component composed of terephthalic acid, isophthalic acid and aliphatic diamine, and an aliphatic polyamide resin (B) selected from the group consisting of nylon 6 and a copolymer which is mainly composed of nylon 6, the ratio of said terephthalic acid to said isophthalic acid in said monomer mixture ranging from about 1:1.5 to 1:3 the ratio of said aromatic polyamide resin (A) to said aliphatic polyamide resin (B) in said mixture ranging from about 5:95 to about 50:50 by weight ratio; and said filament exhibiting heat-shrinkage in boiling water of not less than 20%.
Claim 3
Dependent Claim
18 words
A polyamide filament according to claim 1, wherein said monomer mixture consists essentially of said aromatic polyamide component.
Claim 4
Dependent Claim
55 words
A polyamide filament according to claim 1, wherein said monomer mixture comprises not less than 85 wt % of said aromatic polyamide component and not more than 15 wt % of a component selected from the group consisting of a lactam component and a polyamide component composed of an aliphatic dicarboxylic acid and a diamine.
Claim 5
Dependent Claim
34 words
A polyamide filament according to claim 3, wherein said monomer mixture comprises not less than 85 wt % of said aromatic polyamide component and not more than 15 wt % of a lactam component.
Claim 6
Dependent Claim
24 words
A polyamide filament according to claim 1, wherein said copolymer is a polymer selected from the group consisting of nylon 6/66 and nylon 6/6T.
Claim 7
Dependent Claim
15 words
A polyamide filament according to claim 1, wherein said polyamide resin (B) is nylon 6.
Claim 8
Dependent Claim
13 words
A polyamide filament according to claim 1, wherein said aliphatic diamine is hexamethylenediamine.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1994-12-23 | 1995-06-24 | 1995-12-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-12-23 | 1999-06-24 | 1999-12-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-12-23 | 2003-06-24 | 2003-12-24 | $7700.00 | Window Closed / Lapsed |