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US4122658A
Expired / Lapsed
US
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False-twist yarn and process
Assignee: Toray Industries Inc
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Filing: 1977-08-29
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Granted: 1978-10-31
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Expires: 1997-08-29
Abstract
Abstract "Islands-in-a-sea" type composite filaments consisting of a relatively low melting point sea component and a plurality of higher melting point island components are false-twisted at a false-twisting temperature Q, wherein: P + 10 ≦ Q < R (wherein P is the melting point of the sea component and R is the melting point of each of the island components) to obtain a false-twist yarn. The cross-sectional configuration of the composite filaments as a whole undergoes deformation, but the cross-sectional configuration of each of the island components in said filaments undergoes substantially no deformation.
Inventors
- 👤 Atsumi Morioka
- 👤 Tamotsu Nakashima
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 11:56
CPC Classifications
D; D02; D02G; D02G1/00; D02G1/02; D02G1/0286; Y; Y10; Y10S; Y10S57/00; Y10S57/905
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
74 words
A false-twist yarn comprising a plurality of false-twisted "islands-in-a-sea" type composite synthetic polymer filaments, said filaments comprising a plurality of island components having a predetermined melting point, and a sea component having a melting point below that of said island components, characterized in that the cross-sectional configuration of the composite filament as a whole has been deformed the cross-sectional configuration of each of the island components in said filaments is substantially free of deformation.
Claim 2
Dependent Claim
74 words
A false-twist yarn comprising a plurality of false-twisted "islands-in-a-sea" type composite synthetic polymer filaments, said filaments comprising a plurality of island components having a predetermined melting point, and a sea component having a melting point below that of said island components, characterized in that the cross-sectional configuration of the composite filament as a whole has been deformed the cross-sectional configuration of each of the island components in said filaments is substantially free of deformation.
Claim 3
Dependent Claim
29 words
A false-twist yarn according to claim 1, wherein said composite filaments are free of fusion to one another and the crimp rigidity of the yarn is at least 7%.
Claim 4
Dependent Claim
16 words
A false-twist yarn according to claim 1, wherein said composite filaments are fused to one another.
Claim 5
Dependent Claim
32 words
A false-twist yarn according to claim 1, wherein the difference between the melting point of each of said island components and that of said sea component is at least about 100° C.
Claim 6
Dependent Claim
17 words
A false-twist yarn according to claim 4, wherein the said difference is at least about 120° C.
Claim 7
Dependent Claim
27 words
A false-twist yarn according to claim 1, wherein said island components are selected from the group consisting of polyester and polyamide, and said sea component is polystyrene.
Claim 8
Dependent Claim
26 words
A false-twist yarn according to claim 1, wherein the weight ratio of said island components, based upon the total, is within the range of about 65-90%.
Claim 9
Dependent Claim
20 words
A false-twist yarn according to claim 1, wherein the number of said island components is from about 3 to 10.
Claim 10
Dependent Claim
21 words
A false-twist yarn according to claim 1, wherein the denier of each of said island components averages from about 0.5-0.9 d.
Claim 11
Dependent Claim
22 words
A false-twist yarn according to claim 1, wherein at least two island components are different in deformation degree of the cross-sectional configuration.
Claim 12
Dependent Claim
69 words
A process for the production of a false-twist yarn which comprises false-twisting "islands-in-a-sea" type composite filaments which comprise a plurality of higher melting point island components and a lower melting point sea component at the temperature Q, wherein Q satisfies the relationship P + 10 ≦ Q < R wherein P is the melting point of the sea component and R is the melting point of the island components.
Claim 13
Dependent Claim
69 words
A process for the production of a false-twist yarn which comprises false-twisting "islands-in-a-sea" type composite filaments which comprise a plurality of higher melting point island components and a lower melting point sea component at the temperature Q, wherein Q satisfies the relationship P + 10 ≦ Q < R wherein P is the melting point of the sea component and R is the melting point of the island components.
Claim 14
Dependent Claim
29 words
A process according to claim 11, wherein the difference between the melting point of said island components and that of said sea component is at least about 100° C.
Claim 15
Dependent Claim
31 words
A process according to claim 12, wherein the difference between the melting point of each of said island components from that of said sea component is at least about 120° C.
Claim 16
Dependent Claim
20 words
A process according to claim 11, wherein said island components are polyester or polyamide and said sea component is polystyrene.
Claim 17
Dependent Claim
23 words
A process according to claim 11, wherein said Q is within the following range: P + 10 ≦ Q < P + 40
Claim 18
Dependent Claim
21 words
A process according to claim 11, wherein said Q is within the following range: P + 40 ≦ Q < R
Claim 19
Dependent Claim
112 words
a false-twist yarn comprising a plurality of false-twisted "islands-in-a-sea" type composite filaments, said filaments comprising a plurality of thermoplastic island components having a predetermined melting point, and a thermoplastic polymer sea component having a melting point at least 100° C. lower than said island components, the percentage by weight of island components to the total weight of yarn being essentially within the range of 65-90%, the denier of each of said island components being within the range of about 0.001-10 denier, the cross-sectional configuration of the composite filament as a whole having been deformed, and the cross-sectional configuration of each of the island components in said filaments being substantially free of deformation.
Claim 20
Dependent Claim
112 words
a false-twist yarn comprising a plurality of false-twisted "islands-in-a-sea" type composite filaments, said filaments comprising a plurality of thermoplastic island components having a predetermined melting point, and a thermoplastic polymer sea component having a melting point at least 100° C. lower than said island components, the percentage by weight of island components to the total weight of yarn being essentially within the range of 65-90%, the denier of each of said island components being within the range of about 0.001-10 denier, the cross-sectional configuration of the composite filament as a whole having been deformed, and the cross-sectional configuration of each of the island components in said filaments being substantially free of deformation.
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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) | 1981-10-30 | 1982-05-01 | 1982-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-10-30 | 1986-05-01 | 1986-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-10-30 | 1990-05-01 | 1990-10-31 | $7700.00 | Window Closed / Lapsed |