US3919033A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fabric bonding process utilizing powdered interpolyamides
Assignee: Imperial Chemical Industries Ltd
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Filing: 1973-05-01
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Granted: 1975-11-11
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Expires: 1993-05-01
Abstract
Abstract Bonding fabrics, using as a fusible adhesive a polyamide consisting essentially of hexamethyleneazeleamide units, Epsilon -aminocaproic acid units and optionally hexamethylene adipamide units randomly distributed, the proportions of the units being such that the softening point range (by ball and ring technique) is 120* to 160*C.
Inventors
- 👤 Wendy Rawstron Gill
- 👤 John Norbury
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 05:40
CPC Classifications
C; C08; C08G; C08G69/00; C08G69/02; C08G69/36; D; D06; D06M; D06M17/00; D06M17/04; D06M17/08; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31725; Y10T428/31739
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
109 words
A FABRIC BONDING PROCESS COMPRISING APPLYING TO A FABRIC SURFACE AN INTERPOLYAMIDE IN THE FORM OF A FINELY DIVIDED POWDER CONSISTING ESSENTIALLY OF HEXAMETHYLENEAZELEAMIDE UNITS IN A PROPORTION OF 20-62% BY WEIGHT, E-AMINO CAPRIOC ACID UNITS IN A PROPORTION 25-65% BY WEIGHT AND HECAMETHYLENE ADIPAMIDE UNITS IN A PROPORTION OF 0-30% BY WEIGHT, THE PROPORTION OF THE UNITS BEING SUCH THAT THE SOFTENING POINT RANGE OF THE POLYAMIDE DETERMINED BY THE BALL AND RING TECHNIQUE USING AN OIL BATH HEATING RATE OF 4* TO 5*C PER MINUTE IS BETWEEN 120* AND 160*C, BRINGING SAID SURFACE INTO CONTACT WITH A SECOND FABRIC SURFACE AND APPLYING HEAT TO SOFTEN THE POLYAMIDE.
Claim 2
Dependent Claim
109 words
A FABRIC BONDING PROCESS COMPRISING APPLYING TO A FABRIC SURFACE AN INTERPOLYAMIDE IN THE FORM OF A FINELY DIVIDED POWDER CONSISTING ESSENTIALLY OF HEXAMETHYLENEAZELEAMIDE UNITS IN A PROPORTION OF 20-62% BY WEIGHT, E-AMINO CAPRIOC ACID UNITS IN A PROPORTION 25-65% BY WEIGHT AND HECAMETHYLENE ADIPAMIDE UNITS IN A PROPORTION OF 0-30% BY WEIGHT, THE PROPORTION OF THE UNITS BEING SUCH THAT THE SOFTENING POINT RANGE OF THE POLYAMIDE DETERMINED BY THE BALL AND RING TECHNIQUE USING AN OIL BATH HEATING RATE OF 4* TO 5*C PER MINUTE IS BETWEEN 120* AND 160*C, BRINGING SAID SURFACE INTO CONTACT WITH A SECOND FABRIC SURFACE AND APPLYING HEAT TO SOFTEN THE POLYAMIDE.
Claim 3
Dependent Claim
31 words
A fabric bonding process according to claim 1 wherein the interpolyamide is in the form of a finely divided powder having a number average particle size less than 300 Mu .
Claim 4
Dependent Claim
24 words
A fabric bonding process according to claim 2 wherein the number average particle size is in the range of 100 to 300 Mu .
References Cited (Backward Citations)
US2252554A
Cited
US2252555A
Cited
US2293760A
Cited
US2285009A
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US3583949A
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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) | 1978-11-10 | 1979-05-12 | 1979-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-10 | 1983-05-12 | 1983-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-10 | 1987-05-12 | 1987-11-11 | $7700.00 | Window Closed / Lapsed |