Patent US5349028A successfully refreshed from Google Patents.
US5349028A
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US
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Polyester fibers
Assignee: Resonac Holdings Corp
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Filing: 1993-04-20
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Granted: 1994-09-20
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Expires: 2013-04-20
Abstract
Abstract Polyester fiber consisting of an aliphatic polyester having a melt viscosity of 1.0×10 2 -1.0×10 4 poises at a temperature of 190° C. at a shear rate of 1000 sec -1 and a melting point of 70-190° C. The polyester fiber of the present invention exhibits biodegradability when buried in the ground. The amount of combustion heat generated on incineration is smaller than that of polyethylene and polypropylene. The polyester fiber of the present invention has excellent physical properties.
Inventors
- 👤 Tetuya Takahashi
- 👤 Hitoshi Uda
- 👤 Akira Nakamura
- 👤 Ryosuke Kamei
- 👤 Eiichiro Takiyama
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:31
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/16; C08J9/18; B; B32; B32B; B32B27/00; B32B27/06; B32B27/10; B32B27/36; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/0895; C08G18/28; C08G18/40; C08G18/42; C08G18/4236; C08G18/4238; C08G18/4241; C08G18/4266; C08G18/4283; C08G18/4286; C08G18/48; C08G18/4854; C08G63/00; C08G63/02; C08G63/12; C08G63/16; C08G63/20; C08G63/91; C08G63/914; C08G63/916; C08J5/00; C08J5/18; C08J9/04; C08J9/06; C08J9/12; C08J9/14; D; D01; D01D; D01D5/00; D01D5/42; D01F; D01F6/00; D01F6/58; D01F6/62; D01F6/625; D01F6/70; C08G2101/00; C08G2110/00; C08G2110/0008; C08G2230/00; C08G2250/00; C08J2201/00; C08J2201/02; C08J2201/03; C08J2367/00; C08J2367/02; C08J2375/00; C08J2375/04; C08J2375/06; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/2964; Y10T428/2967; Y10T428/2969
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
145 words
Polyester fiber comprising an aliphatic polyester having a melt viscosity of 1.0×10 2 -1.0×10 4 poises at a temperature of 190° C. and a shear rate of 100 sec -1 , and having a melting point of 70-190° C. wherein said aliphatic polyester is obtained from ingredients consisting essentially of diisocyanate and a prepolymer in a molten state by adding from 0.1 to 5 parts by weight of diisocyanate to 100 parts by weight of the prepolymer in a molten state, wherein said prepolymer is obtained from a reaction of at least an aliphatic glycol and an aliphatic dicarboxylic acid, wherein the reaction includes (a) succinic acid, or its anhydride, reacted with 1,4-butanediol, (b) succinic acid, adipic acid, or their anhydride, reacted with 1,4-butanediol, or (c) succinic acid, or its anhydride, reacted with ethylene glycol, and has a number-average molecular weight of at least 10,000.
Claim 2
Dependent Claim
145 words
Polyester fiber comprising an aliphatic polyester having a melt viscosity of 1.0×10 2 -1.0×10 4 poises at a temperature of 190° C. and a shear rate of 100 sec -1 , and having a melting point of 70-190° C. wherein said aliphatic polyester is obtained from ingredients consisting essentially of diisocyanate and a prepolymer in a molten state by adding from 0.1 to 5 parts by weight of diisocyanate to 100 parts by weight of the prepolymer in a molten state, wherein said prepolymer is obtained from a reaction of at least an aliphatic glycol and an aliphatic dicarboxylic acid, wherein the reaction includes (a) succinic acid, or its anhydride, reacted with 1,4-butanediol, (b) succinic acid, adipic acid, or their anhydride, reacted with 1,4-butanediol, or (c) succinic acid, or its anhydride, reacted with ethylene glycol, and has a number-average molecular weight of at least 10,000.
Claim 3
Dependent Claim
31 words
The polyester fiber as claimed in claim 1 wherein said fiber is a monofilament having a tensile strength of 2.0 to 12.0 g/d and a tensile elongation of 7 to 110%.
Claim 4
Dependent Claim
37 words
The polyester fiber as claimed in claim 1 wherein said fiber is a parallel fiber having a tensile strength of 2.0 to 12.0 g/d and a tensile elongation of 5 to 80% in a separated single fiber.
Claim 5
Dependent Claim
31 words
The polyester fiber as claimed in claim 1 wherein said fiber is a multifilament having a tensile strength of 2.0 to 10.0 g/d and a tensile elongation of 10 to 120%.
Claim 6
Dependent Claim
35 words
The polyester fiber as claimed in claim 1 wherein said fiber is a staple consisting of the multifilaments having a tensile strength of 2.0 to 10.0 g/d and a tensile elongation of 10 to 120%.
Claim 7
Dependent Claim
32 words
The polyester fiber as claimed in claim 1 wherein said fiber is a crimped fiber having a tensile strength of 2.0 to 10.0 g/d and a percentage crimp of 3 to 20.
Claim 8
Dependent Claim
55 words
The polyester fiber as claimed in claim 1 wherein said fiber is a composite fiber comprising a sheath component made of one of a group of raw materials respectively consisting of as a main component a high-melting point aliphatic polyester and low-melting point aliphatic polyester; and a core component made of the other raw material.
Claim 9
Dependent Claim
78 words
The polyester fiber as claimed in claim 1 wherein the aliphatic polyester has a repeated chain structure in which a polyester prepolymer having a number-average molecular weight (Mn) of 1,000 or more and obtained by reacting the aliphatic glycol, the aliphatic dicarboxylic acid and, as a third component, at least one polyfunctional component selected from the group consisting of trifunctional or tetrafunctional polyols, oxycarboxylic acids and polybasic carboxylic acids or acid anhydrides thereof, is combined through urethane bonds.
Claim 10
Dependent Claim
38 words
The polyester fiber as claimed in claim 8 wherein the polyester prepolymer contains one or more compounds selected from the group consisting of trimethylol propane, glycerin and pentaerythritol as the trifunctional or tetrafunctional polyol of the third component.
Claim 11
Dependent Claim
41 words
The polyester fiber as claimed in claim 8 wherein the polyester prepolymer contains one or more compounds selected from the group consisting of malic acid, citric acid and tartaric acid as the trifunctional or tetrafunctional oxycarboxylic acid of the third component.
Claim 12
Dependent Claim
50 words
The polyester fiber as claimed in claim 8 wherein the polyester prepolymer contains one or more compounds selected from the group consisting of trimesic acid, propane tricarboxylic acid, trimellitic anhydride, pyromellitic anhydride, benzophenone tetracarboxylic anhydride and cyclopentane tetracarboxylic anhydride as the trifunctional or tetrafunctional polybasic carboxylic acid the third component.
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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) | 1997-09-19 | 1998-03-21 | 1998-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-09-19 | 2002-03-21 | 2002-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-09-19 | 2006-03-21 | 2006-09-20 | $7700.00 | Window Closed / Lapsed |