US3853659A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for improving the bonding of nylon filaments by the use of a hydrogen halide gas
Assignee: Fitesa Simpsonville Inc
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Filing: 1972-12-29
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Granted: 1974-12-10
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Expires: 1992-12-29
Abstract
Abstract A process for improving the bonding efficiency of nylon fibers for the formation of a high-strength spunbonded fabric including preparing the fibers for bonding by increasing the moisture regain of the nylon fibers which comprise a mat to at least 2% based on the weight of the fiber, subjecting the mat to a gaseous atmosphere containing less than 2% by volume of a hydrogen halide gas and greater than about 0.5% by volume of water vapor to increase the moisture regain of the nylon to at least 3% based on weight with said fibers absorbing at least 2% of the hydrogen halide gas based on weight and completing the bonding of the fibers by pressing the fibers together while the fibers contain the mentioned water and hydrogen halide gas and by removing the hydrogen halide gas from the fibers.
Inventors
- 👤 J Rhodes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:17
CPC Classifications
D; D04; D04H; D04H3/00; D04H3/08; D04H3/14; D04H1/00; D04H1/40; D04H1/54
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
15 words
PRESSING SAID FIBERS TOGETHER WHILE SAID FIBERS CONTAIN SAID WATER AND HYDROGEN HALIDE GAS; AND
Claim 2
Dependent Claim
15 words
PRESSING SAID FIBERS TOGETHER WHILE SAID FIBERS CONTAIN SAID WATER AND HYDROGEN HALIDE GAS; AND
Claim 3
Dependent Claim
49 words
A PROCESS FOR TRANSFORMING AN UNBONDED FIBROUS MAT OF NYLON FIBERS IBINTO A HIGH-STRENGTH BONDED NON-WOVEN WEB COMPRISING THE STEPS OF: A. PREPARING THE FIBERS FOR BONDING BY A. INCREASING THE MOISTURE REGAIN OF SAID NYLON FIBERS TO AT LEAST 2% BASED ON THE WEIGHT OF SAID NYLON FIBERS;
Claim 4
Dependent Claim
49 words
A PROCESS FOR TRANSFORMING AN UNBONDED FIBROUS MAT OF NYLON FIBERS IBINTO A HIGH-STRENGTH BONDED NON-WOVEN WEB COMPRISING THE STEPS OF: A. PREPARING THE FIBERS FOR BONDING BY A. INCREASING THE MOISTURE REGAIN OF SAID NYLON FIBERS TO AT LEAST 2% BASED ON THE WEIGHT OF SAID NYLON FIBERS;
Claim 5
Dependent Claim
100 words
SUBJECTING SAID MAT TO A GASEOUS ATMOSPHERE HAVING A TEMPERATURE OF FROM 50* TO 120*F. AND CONTAINING LESS THAN ABOUT 2% BY VOLUME OF A HYDROGEN HALIDE GAS AND GREATER THAN ABOUT 0.5% BY VOLUME OF WATER VAPOR, BUT LOWER THAN THE DEW POINT OF SAID WATER VAPOR-HYDROGEN HALIDE GAS MIXTURE AT ANY GIVEN GASEOUS ATMOSPHERE TEMPERATURE, SAID NYLON FIBERS INCREASING SAID MOISTURE REGAIN TO AT LEAST 3% BASED ON WEIGHT OF SAID FIBERS AND ABSORBING AT LEAST 2% OF SAID HYDROGEN HALIDE GAS BASED ON THE WEIGHT OF SAID FIBERS; AND B. COMPLETING THE BONDING OF SAID FIBERS BY
Claim 6
Dependent Claim
100 words
SUBJECTING SAID MAT TO A GASEOUS ATMOSPHERE HAVING A TEMPERATURE OF FROM 50* TO 120*F. AND CONTAINING LESS THAN ABOUT 2% BY VOLUME OF A HYDROGEN HALIDE GAS AND GREATER THAN ABOUT 0.5% BY VOLUME OF WATER VAPOR, BUT LOWER THAN THE DEW POINT OF SAID WATER VAPOR-HYDROGEN HALIDE GAS MIXTURE AT ANY GIVEN GASEOUS ATMOSPHERE TEMPERATURE, SAID NYLON FIBERS INCREASING SAID MOISTURE REGAIN TO AT LEAST 3% BASED ON WEIGHT OF SAID FIBERS AND ABSORBING AT LEAST 2% OF SAID HYDROGEN HALIDE GAS BASED ON THE WEIGHT OF SAID FIBERS; AND B. COMPLETING THE BONDING OF SAID FIBERS BY
Claim 7
Dependent Claim
8 words
REMOVING SAID HYDROGEN HALIDE GAS FROM SAID FIBERS.
Claim 8
Dependent Claim
8 words
REMOVING SAID HYDROGEN HALIDE GAS FROM SAID FIBERS.
Claim 9
Dependent Claim
100 words
subjecting said mat to a gaseous atmosphere having a temperature of from 50* to 120*F. and containing less than about 2% by volume of a hydrogen halide gas and greater than about 0.5% by volume of water vapor, but lower than the dew point of said water vapor--hydrogen halide gas mixture at any given gaseous atmosphere temperature, said nylon fibers increasing said moisture regain to at least 3% based on weight of said fibers and absorbing at least 2% of said hydrogen halide gas based on the weight of said fibers; and B. completing the bonding of said fibers by
Claim 10
Dependent Claim
100 words
subjecting said mat to a gaseous atmosphere having a temperature of from 50* to 120*F. and containing less than about 2% by volume of a hydrogen halide gas and greater than about 0.5% by volume of water vapor, but lower than the dew point of said water vapor--hydrogen halide gas mixture at any given gaseous atmosphere temperature, said nylon fibers increasing said moisture regain to at least 3% based on weight of said fibers and absorbing at least 2% of said hydrogen halide gas based on the weight of said fibers; and B. completing the bonding of said fibers by
Claim 11
Dependent Claim
8 words
removing said hydrogen halide gas from said fibers.
Claim 12
Dependent Claim
8 words
removing said hydrogen halide gas from said fibers.
Claim 13
Dependent Claim
14 words
The process of claim 1 wherein said hydrogen halide gas is hydrogen chloride gas.
Claim 14
Dependent Claim
13 words
The process of claim 1 wherein said nylon fibers are continuous nylon filaments.
Claim 15
Dependent Claim
18 words
The process of claim 1 wherein hydrogen halide gas is removed by means of a water wash bath.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-12-09 | 1978-06-10 | 1978-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-09 | 1982-06-10 | 1982-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-09 | 1986-06-10 | 1986-12-10 | $7700.00 | Window Closed / Lapsed |