Claims
- 1. A feed yarns for air-jet texturing spun at a spinning speed greater than 2200 MPM, said yarn comprising:
- a. polyamide filaments having a relative viscosity of at least 46, as measured on a solution of 11.0 grams of polyamide dissolved in 100 ml of 90% formic acid at 25.degree. C. and a modification ratio between 1.5 and 4.0;
- b. a normalized small angle x-ray scattering peak intensity of at least 1.3; and
- c. a normalized lamellar dimensional product of at least 1.3.
- 2. The yarn defined in claim 1, wherein said polyamide has a relative viscosity of at least 53, as measured on a solution of 11.0 grams of polyamide dissolved in 100 ml of 90% formic acid at 25.degree. C.
- 3. The yarn defined in claim 1, wherein said polyamide has a relative viscosity of at least 65, as measured on a solution of 11.0 grams of polyamide dissolved in 100 ml of 90% formic acid at 25.degree. C.
- 4. The yarn defined in claim 1, wherein said polyamide is nylon 66.
- 5. The yarn defined in claim 1, wherein said yarn has an elongation of less than 100%.
- 6. A feed yarn for air-jet texturing spun at a spinning speed greater than 2200 MPM, said yarn having an elongation less than 100%, said yarn comprising polyamide filaments having:
- a. a normalized small angle x-ray scattering peak intensity of at least 1.3;
- b. a normalized lamellar dimensional product of at least 1.3;
- c. less than 3 branches; and
- d. a modification ratio greater than 1.5 and a relative viscosity of at least 46, as measured on a solution of 11.0 grams of polyamide dissolved in 100 ml of 90% formic acid at 25.degree. C.
- 7. The yarn defined in claim 6, wherein said polyamide having a relative viscosity of at least 53, as measured on a solution of 11.0 grams of polyamide dissolved in 100 ml of 90% formic acid at 25.degree. C.
- 8. The yarn defined in claim 6, wherein said polyamide having a relative viscosity of at least 65, as measured on a solution of 11.0 grams of polyamide dissolved in 100 ml of 90% formic acid at 25.degree. C.
- 9. The yarn defined in claim 6, wherein said polyamide is nylon 66.
Parent Case Info
This is a continuation of application Ser. No. 776,932, filed Sep. 17, 1986, now abandoned.
US Referenced Citations (12)
Non-Patent Literature Citations (1)
Entry |
Annual Book of ASTM Standards 1982, Part 36, pp. 57-65. |
Continuations (1)
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Number |
Date |
Country |
Parent |
776932 |
Sep 1985 |
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