Patent US3607610A successfully refreshed from Google Patents.
US3607610A
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Crimped composite filaments of polycaprolactam or polyhexamethylene adipamide, and a terpolyamide of e-caprolactam, hexamethylenediammonium adipate, hexamethylene diammonium sebacate
Assignee: Asahi Kasei Corp
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Filing: 1968-01-30
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Granted: 1971-09-21
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Expires: 1988-01-30
Abstract
Abstract Composite filaments capable of giving excellent crimped yarns are obtained by using, in the production of polyamide composite filaments, the terpolyamide 6/66/610 as a copolymer to be used in combination with either nylon 6 or nylon 66. The proportions of the individual monomers in the terpolyamide are specified in the areas A and B in the accompanying drawing.
Inventors
- 👤 Noboru Fukuma
- 👤 Hiroshi Chayamiti
- 👤 Toshio Okamoto
- 👤 Seizaburo Shigeta
- 👤 Hiroshi Takeda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:58
CPC Classifications
D; D01; D01F; D01F8/00; D01F8/04; D01F8/12; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2922; Y10T428/2924; Y10T428/2933; Y10T428/2964; Y10T428/2967; Y10T428/2969; Y10T428/2973
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
51 words
A process for producing a side-by-side or eccentric sheath-core crimped composite filaments by melt spinning poly- epsilon -caprolactam or polyhexamethylene adipamide and, a terpolyamide comprising epsilon -caprolactam, hexamethylenediammonium adipate and hexamethylenediammonium sebacate wherein the molar composition of said terpolyamide is within the range defined by the area B in the drawing.
Claim 2
Dependent Claim
68 words
A side-by-side or eccentric sheath-core crimped composite filament, one component of said filament being caprolactam, or polyhexamethylene adipamide, the other component being a terpolyamide of epsilon -caprolactam, hexamethylene diammonium adipate, and hexamethylene diammonium sebacate, wherein the epsilon -caprolactam, hexamethylenediammonium adipate and hexamethylenediammonium sebacate are present in a molar ratio of 1-30: 30-79: 20-60, with the proviso that the total amount of the three above components equals 100 percent.
Claim 3
Dependent Claim
68 words
A side-by-side or eccentric sheath-core crimped composite filament, one component of said filament being caprolactam, or polyhexamethylene adipamide, the other component being a terpolyamide of epsilon -caprolactam, hexamethylene diammonium adipate, and hexamethylene diammonium sebacate, wherein the epsilon -caprolactam, hexamethylenediammonium adipate and hexamethylenediammonium sebacate are present in a molar ratio of 85-98: 1-14: 1-14, with the proviso that the total amount of the three above components equals 100 percent.
References Cited (Backward Citations)
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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) | 1974-09-20 | 1975-03-22 | 1975-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-20 | 1979-03-22 | 1979-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-20 | 1983-03-22 | 1983-09-21 | $7700.00 | Window Closed / Lapsed |