Patent FI28829A successfully refreshed from Google Patents.
US3583147A
Expired / Lapsed
US
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Heat-set mechanically crimped filaments having different polyamide compositions
Assignee: EIDP Inc
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Filing: 1969-06-30
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Granted: 1971-06-08
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Expires: 1989-06-30
Abstract
Abstract A bulky yarn may be prepared by mechanically crimping yarns of intermingled continuous filaments having at least two different compositions. Typically one of the compositions is a polyamide derived from bis (para-aminocyclohexyl) methane and dodecanedioic acid, and another of the compositions is a copolymer derived from bis (para-aminocyclohexyl) methane and a mixture of dodecanedioic acid and isophthalic acid. In the typical mixed yarn the copolymer contains about 70 percent trans-trans stereoisomer in the diamine. The mixed yarn has about 2 to 25 percent elongation available due to crimp (crimp index). The two types of crimped filaments in the yarn have a difference in filament length (DFL) of at least 5 percent, this DFL being greater than the DFL of filaments prior to crimping.
Inventors
- 👤 Alfred Anthony Brizzolara Jr
- 👤 Ronald Frederick Lange
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:44
CPC Classifications
D; D02; D02G; D02G1/00; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2922; Y10T428/2924
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
279 words
The yarn of claim 1 characterized in that one of said types of filaments consists essentially of the repeating units of the formula I, and the other of said types being constituted of a member of the class consisting of: A. a copolyamide containing from 50 to 95 mol percent of the repeating units of formula (I) and 5 to 50 mol percent of another polyamide unit prepared from a member of the class consisting of (1) the same diamine as employed for production of formula (I) repeat unit with a different dicarboxylic acid and (2) the same dicarboxylic acid as employed for production of the formula (I) repeat unit with a different diamine, B. a polycarbonamide consisting essentially of the units of formula (I) but differing from the polycarbonamide constituting said first group of filaments in the steric configuration of the diamino constituent by at least 10 percent by weight in a steric form, C. a polycarbonamide consisting essentially of the units of formula (I) and having a relative viscosity that is at least about 9 units less than that of the polycarbonamide constituTing the said first group of filaments, D. a polycarbonamide consisting essentially of the units of formula (I) wherein the chain length of the diacid constituent of the polymer units constituting the said second group of filaments is less than the chain length of the diacid constituent of the polymer units constituting the said first group of filaments, and E. a polycarbonamide consisting essentially of the units of formula (I), the said second group of filaments having an Orientation Index that is at least about 1.0 greater than that of said first group of filaments.
Claim 2
Dependent Claim
26 words
Yarn of claim 1, said yarn being torsionally crimped and characterized by a crimp frequency of at least 20 crimps per inch based on extended length.
Claim 3
Dependent Claim
37 words
A heat-set mechanically crimped yarn comprising a plurality of continuous organic polymeric filaments containing at least two types of intermingled thermoplastic polyamide filaments, one of said types consisting essentially of repeating polymeric units characterized by the formula:
Claim 4
Dependent Claim
19 words
The yarn of claim 4 characterized in that y is 10 and said different dicarboxylic acid is isophthalic acid.
Claim 5
Dependent Claim
18 words
A fabric construction characterized by at least 30 percent by weight of the yarn defined in claim 5.
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) | 1974-06-07 | 1974-12-07 | 1975-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-07 | 1978-12-07 | 1979-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-07 | 1982-12-07 | 1983-06-08 | $7700.00 | Window Closed / Lapsed |