US4058967A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Textured polyester multifilament yarn
Assignee: Teijin Ltd
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Filing: 1976-04-22
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Granted: 1977-11-22
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Expires: 1996-04-22
Abstract
Abstract Textured polyester multifilament yarns usable for producing knitted or woven fabrics having a desirable dyeing property but no objectionable appearance of local glitter, are prepared, with high efficiency, by simultaneously drawing and false-twist texturing an undrawn polyester multifilament feed yarn composed of a plurality of polyester filaments each having a multilobal cross-sectional profile having 5 to 10 lobes projected radially with substantially equal angular intervals therebetween about the center of the filament, the cross-sectional profile satisfying the relationship (1) 1.05 ≦ R.sub.1 /R.sub.0 ≦ 1.16 (1) wherein R 0 is the radius of an imaginary circle inscribed within the cross-section around the center of the filament and R 1 is the radius of another imaginary circle circumscribed about the tips of at least half the total number of the lobes, around the center of the filament.
Inventors
- 👤 Hiroyuki Iimuro
- 👤 Takumi Horiuchi
- 👤 Yoji Kuroda
- 👤 Kikuo Hori
- 👤 Tatumi Kawano
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:16
CPC Classifications
D; D02; D02G; D02G1/00; D02G1/02; D02G1/0206; D02G1/022; D01; D01D; D01D5/00; D01D5/253; D02G1/0286; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2973; Y10T428/298
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
104 words
A polyester multifilament feed yarn, comprising a plurality of undrawn polyester filaments each having a multilobal cross sectional profile having 5 to 10 lobes projected radially with substantially equal angular intervals therebetween about the center of the filament, said cross sectional profile satisfying the following relationship (1): 1.05 ≦ R.sub.1 /R.sub.0 ≦ 1.16 1 wherein R 0 represents the radius of an imaginary circle inscribed within said cross section around the center of the filament, R 1 represents the radius of another imaginary circle circumscribed about the tips of at least half the total number of said lobes around the center of the filament.
Claim 2
Dependent Claim
104 words
A polyester multifilament feed yarn, comprising a plurality of undrawn polyester filaments each having a multilobal cross sectional profile having 5 to 10 lobes projected radially with substantially equal angular intervals therebetween about the center of the filament, said cross sectional profile satisfying the following relationship (1): 1.05 ≦ R.sub.1 /R.sub.0 ≦ 1.16 1 wherein R 0 represents the radius of an imaginary circle inscribed within said cross section around the center of the filament, R 1 represents the radius of another imaginary circle circumscribed about the tips of at least half the total number of said lobes around the center of the filament.
Claim 3
Dependent Claim
72 words
A feed yarn as claimed in claim 1, wherein said cross sectional profile has one or more lobes other than said lobes satisfying the relationship (1), and said other lobes satisfy the following relationship (2): 1.05 ≦ R.sub.2 /R.sub.1 ≦ 1.20 2 wherein R 1 is as defined hereinbefore and R 2 represents the radius of another imaginary circle circumscribed about the tips of said other lobes around the center of filament.
Claim 4
Dependent Claim
26 words
A feed yarn as claimed in claim 1, wherein said polyester filament consists of a polyester containing at least 80% by mole of ethylene terephthalate units.
Claim 5
Dependent Claim
16 words
A feed yarn as claimed in claim 3, wherein said polyester consists essentially of polyethylene terephthalate.
Claim 6
Dependent Claim
26 words
A feed yarn as claimed in claim 1, wherein said undrawn polyester filaments are prepared by melt-spinning at a take-up speed of 2500 to 4000 m/min.
Claim 7
Dependent Claim
22 words
A feed yarn as claimed in claim 1, wherein said undrawn polyester filaments have an elongation at break of 90 to 230%.
Claim 8
Dependent Claim
17 words
A feed yarn as claimed in claim 1, wherein said polyester filaments contain therein a delustering agent.
Claim 9
Dependent Claim
17 words
A feed yarn as claimed in claim 7, wherein said delustering agent consists essentially of titanium dioxide.
Claim 10
Dependent Claim
29 words
A feed yarn as claimed in claim 7, wherein said delustering agent is present in an amount of 0.05 to 0.35% based on the weight of said polyester fiber.
Claim 11
Dependent Claim
33 words
A feed yarn as claimed in claim 1, wherein the number of said lobes is 8 and said R 0 and R 1 satisfy the following relationship: 1.10 ≦ R.sub.1 /R.sub.0 ≦ 1.16.
Claim 12
Dependent Claim
33 words
A feed yarn as claimed in claim 1, wherein the number of said lobes is 7 and said R 0 and R 1 satisfy the following relationship: 1.05 ≦ R.sub.1 /R.sub.0 ≦ 1.16.
Claim 13
Dependent Claim
33 words
A feed yarn as claimed in claim 1, wherein the number of said lobes is 6 and said R 0 and R 1 satisfy the following relationship: 1.06 ≦ R.sub.1 /R.sub.0 ≦ 1.16.
Claim 14
Dependent Claim
21 words
A feed yarn as claimed in claim 1, wherein said undrawn polyester filaments each has a denier of 2.5 to 9.0.
Claim 15
Dependent Claim
20 words
A feed yarn as claimed in claim 1, wherein said feed yarn has a total denier of 40 to 450.
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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) | 1980-11-21 | 1981-05-23 | 1981-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-11-21 | 1985-05-23 | 1985-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-11-21 | 1989-05-23 | 1989-11-22 | $7700.00 | Window Closed / Lapsed |