US3901989A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composite filament
Assignee: Asahi Kasei Corp
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Filing: 1973-07-20
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Granted: 1975-08-26
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Expires: 1993-07-20
Abstract
Abstract A crimpable composite filament wherein the one component is homogeneous polyamide and the other random copolyamide, is provided. The obtained filament is superior in crimp developing ability and the knit from the filament is especially suitable for, among others, stretch hosiery.
Inventors
- 👤 Hisao Hokonoki
- 👤 Tatsuo Ishikawa
- 👤 Masahira Sakashita
- 👤 Tetsuhiro Kusunose
- 👤 Noboru Fukuma
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:21
CPC Classifications
D; D01; D01F; D01F8/00; D01F8/04; D01F8/12; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2922; Y10T428/2924; Y10T428/2929
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
161 words
A CIRMPABLE PARTIALLY HEAT RELAXED COMPOSITE NYLON FILAMENT COMPRISING ECCENTRICALLY ARRANGED HOMOPOLYAMIDE AND RANDOM COPOLYAMIDE COMPONENTS, THE HOMOPOLYAMIDE COMPONENT BEING SELECTED FROM THE GROUP CONSISTING OF NYLON 6, NYLON 11, NYLON 12, NYLON 66, NYLON 610 AND NYLON 612, THE RANDOM COPOLYAMIDE COMPONENT BEING NON-CRYSTALLINE AND BEING MADE UP OF MONOMERIC UNITS OF A. NYLON 6 AND NYLON 66 CONTAINING 30 TO 60 WEIGHT PERCENT OF NYLON 6, B. NYLON 6, NYLON 66 AND NYLON 6T OF A COMPOSITION FALLING WITHIN THE SHADED AREA OF FIG. 3, C. NYLON 6, NYLON 66 AND NYLON 610 OF A COMPOSITION FALLING WITHIN THE SHADED AREA OF FIG.4, D. NYLON 6, NYLON 66 AND NYLON 612 OF A COMPOSITION FALLING WITHIN THE SHADED AREA OF FIG.5, E. NYLON 66, NYLON 6T AND NYLON 610 OF A COMPOSITION FALLING WITHIN THE SHADED AREA OF FIG,6, OR F. NYLON 66, NYLON 6T AND NYLON 612 OF A COMPOSITION FALLING WITHIN THE SHADED AREA OF FIG. 7.
Claim 2
Dependent Claim
161 words
A CIRMPABLE PARTIALLY HEAT RELAXED COMPOSITE NYLON FILAMENT COMPRISING ECCENTRICALLY ARRANGED HOMOPOLYAMIDE AND RANDOM COPOLYAMIDE COMPONENTS, THE HOMOPOLYAMIDE COMPONENT BEING SELECTED FROM THE GROUP CONSISTING OF NYLON 6, NYLON 11, NYLON 12, NYLON 66, NYLON 610 AND NYLON 612, THE RANDOM COPOLYAMIDE COMPONENT BEING NON-CRYSTALLINE AND BEING MADE UP OF MONOMERIC UNITS OF A. NYLON 6 AND NYLON 66 CONTAINING 30 TO 60 WEIGHT PERCENT OF NYLON 6, B. NYLON 6, NYLON 66 AND NYLON 6T OF A COMPOSITION FALLING WITHIN THE SHADED AREA OF FIG. 3, C. NYLON 6, NYLON 66 AND NYLON 610 OF A COMPOSITION FALLING WITHIN THE SHADED AREA OF FIG.4, D. NYLON 6, NYLON 66 AND NYLON 612 OF A COMPOSITION FALLING WITHIN THE SHADED AREA OF FIG.5, E. NYLON 66, NYLON 6T AND NYLON 610 OF A COMPOSITION FALLING WITHIN THE SHADED AREA OF FIG,6, OR F. NYLON 66, NYLON 6T AND NYLON 612 OF A COMPOSITION FALLING WITHIN THE SHADED AREA OF FIG. 7.
Claim 3
Dependent Claim
29 words
A filament according to claim 1, wherein the random copolyamide component comprises monomeric units of nylon 6 and nylon 66 containing 30 to 60 weight percent of nylon 6.
Claim 4
Dependent Claim
33 words
A filament according to claim 1, wherein the random copolyamide component comprises monomeric units of nylon 6, nylon 66 and nylon 6T of a composition falling within the shaded area of FIG. 3.
Claim 5
Dependent Claim
33 words
A filament according to claim 1, wherein the random copolyamide component comprises monomeric units of nylon 6, nylon 66 and nylon 610 of a composition falling within the shaded area of FIG. 4.
Claim 6
Dependent Claim
33 words
A filament according to claim 1, wherein the random copolyamide component comprises monomeric units of nylon 6, nylon 66 and nylon 612 of a composition falliNg within the shaded area of FIG. 5.
Claim 7
Dependent Claim
33 words
A filament according to claim 1, wherein the random copolyamide component comprises monomeric units of nylon 66, nylon 6T and nylon 610 of a composition falling within the shaded area of FIG. 6.
Claim 8
Dependent Claim
33 words
A filament according to claim 1, wherein the random copolyamide component comprises monomeric units of nylon 66, nylon 6T and nylon 612 of a composition falling within the shaded area of FIG. 7.
Claim 9
Dependent Claim
45 words
A filament according to claim 1, wherein the filament has 5 to 30 percent of crimp developing ability, less than 15 percent shrinkage in boiling water and a difference of at least 10 percent in the boiling water shrinkages of the homopolyamide and copolyamide components.
Claim 10
Dependent Claim
88 words
The process for producing a composite filament according to claim 8, comprising extruding melts of the homopolyamide and copolyamide components to form an eccentrically arranged filament, drawing the filament, and heat relaxing the drawn filament about 15 to 25 percent under conditions which do not crystallize the random copolyamide component, whereby the filament develops 5 to 30 percent of crimp developing ability, less than 15 percent shrinkage in boiling water and a difference of at least10 percent in the boiling water shrinkages of the homopolyamide and copolyamide components.
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) | 1978-08-25 | 1979-02-24 | 1979-08-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-25 | 1983-02-24 | 1983-08-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-25 | 1987-02-24 | 1987-08-26 | $7700.00 | Window Closed / Lapsed |