US4128989A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Deep-dyeing polyester spinning process
Assignee: Monsanto Co
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Filing: 1977-04-04
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Granted: 1978-12-12
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Expires: 1997-04-04
Abstract
Abstract Polyester yarn is spun at a sufficiently high speed to produce substantial stress-induced crystallinity and low shrinkage. The resulting feed yarn is textured, yielding a textured yarn which dyes considerably deeper than conventional polyester yarns.
Inventors
- 👤 James E. Bromley
- 👤 Wayne T. Mowe
- 👤 Frank Stutz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:52
CPC Classifications
D; D02; D02G; D02G1/00; D02G1/02; D02G1/0286
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
113 words
A process for making a deep-dyeing polyester yarn, comprising the steps of: a. texturing a polyester feed yarn having less than 30% shrinkage, an elongation greater than 10% and less than 80%, and a stress-induced crystalline structure having an average crystallite volume of at least 4 × 10 5 cubic angstroms and an average lateral minimum dimension as determined by X-ray diffraction of more than 45 angstroms, said step of texturing comprising heat-setting of said feed yarn at a temperature above 170° C. and below the melt point of said feed yarn while said feed yarn is deformed into a non-rectilinear configuration, and b. collecting the resulting textured yarn in an orderly fashion.
Claim 2
Dependent Claim
113 words
A process for making a deep-dyeing polyester yarn, comprising the steps of: a. texturing a polyester feed yarn having less than 30% shrinkage, an elongation greater than 10% and less than 80%, and a stress-induced crystalline structure having an average crystallite volume of at least 4 × 10 5 cubic angstroms and an average lateral minimum dimension as determined by X-ray diffraction of more than 45 angstroms, said step of texturing comprising heat-setting of said feed yarn at a temperature above 170° C. and below the melt point of said feed yarn while said feed yarn is deformed into a non-rectilinear configuration, and b. collecting the resulting textured yarn in an orderly fashion.
Claim 3
Dependent Claim
18 words
The process defined in claim 1, wherein said step of texturing comprises drawing while false-twist heat-setting said yarn.
Claim 4
Dependent Claim
18 words
The process defined in claim 2, wherein the temperature of heat-setting is between 180° C. and 245° C.
Claim 5
Dependent Claim
16 words
The process defined in claim 1, wherein said feed yarn has a shrinkage less than 10%.
Claim 6
Dependent Claim
24 words
The process defined in claim 1, wherein said feed yarn has a longitudinal crystallite dimension in the 103 direction of at least 100 angstroms.
Claim 7
Dependent Claim
14 words
A deep-dyeing textured polyester yarn having a crystallite skewness angle between 5° and 35°.
Claim 8
Dependent Claim
14 words
A deep-dyeing textured polyester yarn having a crystallite skewness angle between 5° and 35°.
Claim 9
Dependent Claim
15 words
A yarn as defined in claim 6, wherein said yarn is a false-twist heat-set yarn.
Claim 10
Dependent Claim
16 words
A yarn as defined in claim 6, wherein said skewness angle is between 20° and 30°.
Claim 11
Dependent Claim
16 words
A yarn as defined in claim 7, wherein said skewness angle is between 20° and 30°.
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) | 1981-12-11 | 1982-06-12 | 1982-12-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-12-11 | 1986-06-12 | 1986-12-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-12-11 | 1990-06-12 | 1990-12-12 | $7700.00 | Window Closed / Lapsed |