US3988491A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluorination of polyesters and polyamide fibers
Assignee: Air Products and Chemicals Inc
•
Filing: 1974-01-17
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Granted: 1976-10-26
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Expires: 1994-01-17
Abstract
Abstract The present invention relates to surface modification of synthetic resin fiberform materials, notably polyamide and polyester fiberform materials whose surface has been modified by treatment with elemental fluorine, and to the fluorination process.
Inventors
- 👤 Dale D. Dixon
- 👤 Larry J. Hayes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 12:03
CPC Classifications
D; D06; D06M; D06M11/00; D06M11/07; D06M11/09; D06M11/11; D06M11/32; D06M11/34; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/2964; Y10T428/2967; Y10T428/2969; Y10T442/00; Y10T442/20; Y10T442/2861; Y10T442/2893
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
89 words
An oil stain release moisture transporting fiber form comprising a synthetic resin selected from the group consisting of polyamides and polyesters, said fiber form being surface fluorinated from about [4 × 10 - 7 to 4 × 10 - 1 ] 4 × 10 - 6 to 1 × 10 - 3 mg F/cm 2 on an after wash basis, said fluorinated fiber form exhibiting a neutralization equivalent of below about 15,000 and said fluorinated fiber form having at least 90% of the tensile strength of untreated fiber form.
Claim 2
Dependent Claim
89 words
An oil stain release moisture transporting fiber form comprising a synthetic resin selected from the group consisting of polyamides and polyesters, said fiber form being surface fluorinated from about [4 × 10 - 7 to 4 × 10 - 1 ] 4 × 10 - 6 to 1 × 10 - 3 mg F/cm 2 on an after wash basis, said fluorinated fiber form exhibiting a neutralization equivalent of below about 15,000 and said fluorinated fiber form having at least 90% of the tensile strength of untreated fiber form.
Claim 3
Dependent Claim
25 words
The fluorinated fiber form of claim 1 wherein the carboxy content thereof is at least 50% more than the carboxyl content of untreated fiber form.
Claim 4
Dependent Claim
13 words
The fluorinated fiber form of claim 1 wherein the resin is a polyamide.
Claim 5
Dependent Claim
13 words
The fluorinated fiber form of claim 1 wherein the resin is a polyester.
Claim 6
Dependent Claim
13 words
The fluorinated fiber form of claim 1 wherein the fiber form is fabric.
Claim 7
Independent Claim
86 words
A method for surface treating a fiber form comprising a synthetic resin selected from the group consisting of polyamides and polyesters which comprises contacting the fiber form for less than 15 minutes with a fluorine containing gas having less than about 1% by volume of elemental oxygen, and from about 0.1-5% by volume of elemental fluorine to a combined fluorine level in the fiber form to from 4 × 10 - 6 to 1 × 10 - 3 mg F/cm 2 on an after wash basis.
Claim 8
Independent Claim
86 words
A method for surface treating a fiber form comprising a synthetic resin selected from the group consisting of polyamides and polyesters which comprises contacting the fiber form for less than 15 minutes with a fluorine containing gas having less than about 1% by volume of elemental oxygen, and from about 0.1-5% by volume of elemental fluorine to a combined fluorine level in the fiber form to from 4 × 10 - 6 to 1 × 10 - 3 mg F/cm 2 on an after wash basis.
Claim 9
Dependent Claim
19 words
The method of claim 6 wherein the fluorine containing gas has less than about 0.1% by volume of oxygen.
Claim 10
Dependent Claim
15 words
The method of claim 6 wherein the fluorine containing gas is substantially free of oxygen.
Claim 11
Dependent Claim
13 words
The method of claim 6 wherein the fiber form treated is a fabric.
Claim 12
Dependent Claim
15 words
The method of claim 6 wherein the fiber form fluorinated is an already dyed fabric.
Claim 13
Dependent Claim
19 words
The method of claim 6 wherein the fluorination gas fiber form contact time is less than about 10 minutes.
Claim 14
Dependent Claim
19 words
The method of claim 6 wherein the fluorination gas fiber form contact time is less than about 5 minutes.
Claim 15
Dependent Claim
13 words
The method of claim 6 wherein the fiber form resin is a polyamide.
Claim 16
Dependent Claim
13 words
The method of claim 6 wherein the fiber form resin is a polyester.
References Cited (Backward Citations)
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Cited
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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) | 1979-10-26 | 1980-04-26 | 1980-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-10-26 | 1984-04-26 | 1984-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-10-26 | 1988-04-26 | 1988-10-26 | $7700.00 | Window Closed / Lapsed |