US3939636A
Expired / Lapsed
US
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Mixed yarn
Assignee: Toray Industries Inc
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Filing: 1974-07-24
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Granted: 1976-02-24
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Expires: 1994-07-24
Abstract
Abstract A mixed yarn having a uniform dyeability to an acid dye, which comprises at least two kinds of polyamide filaments differing in shrinkage, each consisting mainly of repeating units represented by the following general formula: ##SPC1##
Inventors
- 👤 Yuzaburo Nakayama
- 👤 Akinori Yamamoto
- 👤 Tomohiko Asahara
- 👤 Masaharu Shimamura
- 👤 Yoshizo Tsuda
- 👤 Keisuke Igawa
- 👤 Mitsuhiro Okamoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 11:46
CPC Classifications
D; D02; D02G; D02G1/00; D02G1/18; D01; D01F; D01F6/00; D01F6/78; D01F6/80; D01F6/805; D06; D06P; D06P3/00; D06P3/02; D06P3/04; D06P3/24; D06P3/241
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
263 words
A mixed yarn having a uniform dyeability to an acid dye which comprises at least two kinds of polyamide filaments differing in shrinkage, characterized in that A. a lower shrinkage filament in which the amount of units each represented by the general formula ##SPC7## or the sum total of the amount of said units and the amount of other isomorphous units is at least 75 mole %, and in the carboxylic acid component in the polymer, ##SPC8## and in the diamine component in the polymer, --HN(CH.sub.2).sub.n NH-- unit ≧ 70 mole % (3) and, (B) a higher shrinkage filament in which the amount of units each represented by the general formula ##SPC9## or the sum total of the amount of said units and the amount of other isomorphous units is smaller than that of said lower shrinkage filament by at least 15 mole % and at least 20 mole % of non-isomorphous units is contained, and wherein in the carboxylic acid component in the polymer, ##SPC10## and in the diamine component in the polymer, --HN(CH.sub.2).sub.n NH-- unit ≧50 mole %, (6) wherein the content of amino end groups in the lower shrinkage polymer is about 5 × 10 - 5 - 12 × 10 - 5 mole/g, said content in the higher shrinkage polymer is about 3 × 10 - 5 - 10 × 10 - 5 mole/g and the content of amino end group in the lower shrinkage filament is larger than that in the higher shrinkage filament by about 2 × 10 - 5 - 8 × 10 - 5 mole/g.
Claim 2
Dependent Claim
263 words
A mixed yarn having a uniform dyeability to an acid dye which comprises at least two kinds of polyamide filaments differing in shrinkage, characterized in that A. a lower shrinkage filament in which the amount of units each represented by the general formula ##SPC7## or the sum total of the amount of said units and the amount of other isomorphous units is at least 75 mole %, and in the carboxylic acid component in the polymer, ##SPC8## and in the diamine component in the polymer, --HN(CH.sub.2).sub.n NH-- unit ≧ 70 mole % (3) and, (B) a higher shrinkage filament in which the amount of units each represented by the general formula ##SPC9## or the sum total of the amount of said units and the amount of other isomorphous units is smaller than that of said lower shrinkage filament by at least 15 mole % and at least 20 mole % of non-isomorphous units is contained, and wherein in the carboxylic acid component in the polymer, ##SPC10## and in the diamine component in the polymer, --HN(CH.sub.2).sub.n NH-- unit ≧50 mole %, (6) wherein the content of amino end groups in the lower shrinkage polymer is about 5 × 10 - 5 - 12 × 10 - 5 mole/g, said content in the higher shrinkage polymer is about 3 × 10 - 5 - 10 × 10 - 5 mole/g and the content of amino end group in the lower shrinkage filament is larger than that in the higher shrinkage filament by about 2 × 10 - 5 - 8 × 10 - 5 mole/g.
Claim 3
Dependent Claim
49 words
A mixed yarn according to claim 1, wherein in the general formulae (1) and (3) in the polymer in said lower shrinkage filament and in the general formulae (4) and (6) in the polymer in said higher shrinkage filament, each symbol η is selected from 11 or 12 respectively.
Claim 4
Dependent Claim
44 words
A mixed yarn according to claim 1, wherein in the general formulae (1) and (3) in the polymer in said lower shrinkage filament and in the general formulae (4) and (6) in the polymer in said higher shrinkage filament, the symbol η is 11.
Claim 5
Dependent Claim
44 words
A mixed yarn according to claim 1, wherein in the general formulae (1) and (3) in the polymer in said lower shrinkage filament and in the general formulae (4) and (6) in the polymer in said higher shrinkage filament, the symbol η is 12.
Claim 6
Dependent Claim
36 words
A mixed yarn according to claim 1, wherein the difference in filament length (DFL) when the mixed yarn is heat-set under the load of 20 mg/d at 180°C for 5 minutes is at least about 5%.
Claim 7
Dependent Claim
22 words
A mixed yarn according to claim 1, wherein the cross sectional configuration of the yarn consisting of said mixed yarn is non-circular.
Claim 8
Dependent Claim
17 words
A mixed yarn according to claim 6, wherein the cross-sectional configuration of the filament yarn is trilobal.
Claim 9
Dependent Claim
41 words
A mixed yarn according to claim 6, wherein the modification ratio (ratio of the diameter of a circumscribed circle to that of an inscribed circle in the cross-sectional configuration of the yarn) is within the range of about 1.3 - 1.9.
Claim 10
Dependent Claim
26 words
A mixed yarn according to claim 1, wherein the content of said lower shrinkage filament is within the range of about 25 - 75% by weight.
Claim 11
Dependent Claim
19 words
A mixed yarn according to claim 1, dyed with an acid dye having substantially no difference of dye absorption.
Claim 12
Dependent Claim
26 words
A knitted or woven fabric consisting of a mixed yarn according to claim 1, dyed with an acid dye having substantially no difference of dye absorption.
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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) | 1979-02-23 | 1979-08-25 | 1980-02-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-02-23 | 1983-08-25 | 1984-02-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-02-23 | 1987-08-25 | 1988-02-24 | $7700.00 | Window Closed / Lapsed |