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Patent US4929471A successfully refreshed from Google Patents.
US4929471A
Expired / Lapsed
US
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Method of treating polyester fabric
Assignee: Duro Industries Inc
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Filing: 1989-04-13
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Granted: 1990-05-29
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Expires: 2009-04-13
Abstract
Abstract A method of treating polyester fabric to enhance the physical properties thereof. The fabric is first exposed to a solution comprising a wetting agent, a nonionic fluorocarbon long chain polymer, a nonionic, cationic or anionic nonsilicone based softener, a gum and a carrier comprising water and/or an organic solvent. The fabric is then exposed to heat and tension to evaporate the carrier from the solution, polymerize the nonionic fluorocarbon long chain polymer, cross-link the polyester, the softener, the gum and the nonionic fluorocarbon long chain polymer and reorient the polyester to a more crystalized structure.
Inventors
- 👤 Howard Groelinger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 15:27
CPC Classifications
D; D06; D06M; D06M15/00; D06M15/19; D06M15/21; D06M15/244; D06M15/256; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/3154; Y10T428/31544; Y10T442/00; Y10T442/20; Y10T442/2279; Y10T442/2287; Y10T442/2352; Y10T442/2369; Y10T442/2385; Y10T442/2418; Y10T442/2484; Y10T442/2631; Y10T442/2713; Y10T442/2861
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
252 words
A method of treating a polyester fabric comprising the steps of: a. exposing said fabric to a solution comprising between approximately 0.5% and 2% by weight of a wetting agent, 4% and 16% by weight of nonionic fluorocarbon long chain polymer, 1% and 6% by weight of nonionic, cationic or anionic nonsilicone based softener, 1% and 10% by weight of gum and 66% and 931/2by weight of a carrier, the nonionic fluorocarbon long chain polymer comprising a copolymer of at least 25% by weight of a fluoroalkyl monomer and an alkylvinyl ether having the formula CH 2 ═CH-OR wherein R represents a halogen substituted lower alkyl group, the carrier being selected from a group consisting of water, water plus a water soluble organic solvent, and a water soluble organic solvent wherein the water soluble organic solvent is of a type which can be volatilized at a temperature below 360° F. without leaving a significant residue and also of a type which can be mixed with the nonionic fluorocarbon long chain polymer without reacting therewith; b. heating said fabric to a temperature sufficient to evaporate substantially all of the carrier thereon; c. heating said fabric from which the carrier has been evaporated to a temperature of between 360° F. and 440° F. to effect curing of said fabric and the remaining components of said solution thereon; and d. applying between approximately 0.5 lbs. per linear in. and 2.0 lbs. per linear in. of tension to said fabric in both longitudinal and transverse directions.
Claim 2
Independent Claim
252 words
A method of treating a polyester fabric comprising the steps of: a. exposing said fabric to a solution comprising between approximately 0.5% and 2% by weight of a wetting agent, 4% and 16% by weight of nonionic fluorocarbon long chain polymer, 1% and 6% by weight of nonionic, cationic or anionic nonsilicone based softener, 1% and 10% by weight of gum and 66% and 931/2by weight of a carrier, the nonionic fluorocarbon long chain polymer comprising a copolymer of at least 25% by weight of a fluoroalkyl monomer and an alkylvinyl ether having the formula CH 2 ═CH-OR wherein R represents a halogen substituted lower alkyl group, the carrier being selected from a group consisting of water, water plus a water soluble organic solvent, and a water soluble organic solvent wherein the water soluble organic solvent is of a type which can be volatilized at a temperature below 360° F. without leaving a significant residue and also of a type which can be mixed with the nonionic fluorocarbon long chain polymer without reacting therewith; b. heating said fabric to a temperature sufficient to evaporate substantially all of the carrier thereon; c. heating said fabric from which the carrier has been evaporated to a temperature of between 360° F. and 440° F. to effect curing of said fabric and the remaining components of said solution thereon; and d. applying between approximately 0.5 lbs. per linear in. and 2.0 lbs. per linear in. of tension to said fabric in both longitudinal and transverse directions.
Claim 3
Dependent Claim
75 words
In the method of claim 1, said exposing step further characterized as exposing said fabric to said solution to achieve a pick up corresponding to a percent add-on of between approximately 1% and 6% of the weight of said fabric of said fluorocarbon long chain polymer, between approximately 0.25% and 4% of the weight of said fabric of said softener and between approximately 0.25% and 4% of the weight of said fabric of said gum.
Claim 4
Dependent Claim
31 words
In the method of claim 2, said exposing step further characterized as comprising the steps of: a. immersing said fabric in said solution; and b. passing said fabric through a mangle.
Claim 5
Dependent Claim
13 words
In the method of claim 1, said solvent further characterized as an alcohol.
Claim 6
Dependent Claim
59 words
In the method of claim 1, said heating step further characterized as heating said fabric to a temperature of between approximately 360° F. and 440° F. for a period of between 1 and 25 seconds, said method further comprising the step of cooling said fabric to a temperature of less than approximately 350° F. immediately after said heating step.
Claim 7
Dependent Claim
10 words
A polyester fabric treated by the method of claim 1.
Claim 8
Dependent Claim
10 words
A polyester fabric treated by the method of claim 2.
Claim 9
Dependent Claim
10 words
A polyester fabric treated by the method of claim 5.
References Cited (Backward Citations)
US4764395A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-05-28 | 1993-11-27 | 1994-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-05-28 | 1997-11-27 | 1998-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-05-28 | 2001-11-27 | 2002-05-29 | $7700.00 | Window Closed / Lapsed |