Wholly aromatic carbocyclic polycarbonamide fiber having orientation angle of less than about 45{20

Publication Number: US 3819587 A
Publication Date: 25-Jun-1974
Application Number: US 178,184 A
Filing Date: 07-Sep-1971
(Source: IFI)

US Patent Publication

Abstract (English)

Fibers of unique internal structure (evidenced by low orientation angle and/or high sonic velocity) and exceptionally high tensile properties (e.g., initial modulus) are prepared from spinning dopes of selected carbocyclic aromatic polyamides in suitable liquid media.

Inventors

KWOLECK S,US

Applicants

EI DU PONT DE NEMOURS AND CO,US

Priority

US 178,184 A  07-Sep-1971 [+1] [-1]

US 827,345 A  23-May-1969

Classifications

International (2006.01): C08L 77/00; D01F 6/60
International: C08G 20/20; C08G 20/38
Cooperative (2013.01.01): C08L 77/00; D01F 6/605; D01D 1/02
National: 528/481; 528/340; 524/606; 528/338; 524/607; 528/502.B; 264/289.6; 528/499; 264/210.8; 524/879; 528/328; 264/235 [+9] [-9]
European: C08L 77/00; D01F 6/60B

Patent References

US 3554971 A

Amorphous or weakly crystalline aromatic polyamides

Jan-1971

US 3287324 A

Poly-meta-phenylene isophthalamides

Nov-1966

US 3354127 A

Aromatic copolyamides

Nov-1967

[+3] [-3]

US 3079219 A

Process for wet spinning aromatic polyamides

Feb-1963

US 3094511 A

Wholly aromatic polyamides

Jun-1963

US 3228902 A

Process for forming polymeric dispersions of aromatic amides with negative solubility

Jan-1966

Language of Filing

English


(Source: DOCDB)

Supplemental Information

Inventors

KWOLECK S

Applicants

DU PONT

Priority

US 178,184 A  07-Sep-1971 [+1] [-1]

US 827,345 A  23-May-1969

Classifications

International (2006.01): C08L 77/00; D01F 6/60
International: C08G 20/20; C08G 20/38
Cooperative (2013.01.01): C08L 77/00; D01F 6/605

2. Fiber of claim 1 having a tenacity of at least about 5 grams per denier.
3. Fiber of claim 2 wherein said orientation is further characterized by a sonic velocity of at least about 4.0 km./sec.
4. Fiber of claim 3 wherein said oRientation angle is less than about 35*, said sonic velocity is at least about 6.0 km./sec.
5. Fiber of claim 4 wherein said sonic velocity is at least about 7.0 km./sec.
6. Fiber of claim 4 wherein said orientation angle is less than about 25* .
7. Fiber of claim 4 wherein said initial modulus is at least about 400 grams per denier.
8. As-extruded fiber of polymer consisting essentially of at least one carbocyclic aromatic homo- or copolycarbonamide having chain extending bonds from each aromatic nucleus which are coaxial or parallel and oppositely directed, the orientation of said fiber being characterized by an orientation angle of less than about 45*, said fiber having a tenacity of at least about 5 grams per denier.
9. Fiber of claim 8 having an elongation of at least about 5 percent.
10. Fiber of claim 9 having an initial modulus of at least about 200 grams per denier.
11. Fiber of claim 10 wherein said orientation is further characterized by a sonic velocity of at least about 4.0 km./sec.
12. Heat-treated fiber of polymer consisting essentially of at least one carbocyclic aromatic homo- or copolycarbonamide having chain extending bonds from each aromatic nucleus which are coaxial or parallel and oppositely directed, sad fiber being characterized by an orientation angle less than about 45* and a sonic velocity at least about 4.0 km./sec., said fiber having an initial modulus of at least about 300 grams per denier and a tenacity of at least about 5 grams per denier.
13. FIber of claim 12 wherein said orientation angle is less than about 25* and said sonic velocity is at least about 7.0 km./sec., said fiber having an initial modulus of at least about 400 grams per denier.
14. Fiber of polymer consisting essentially of at least one carbocyclic aromatic homo- or random copolycarbonamide having chain extending bonds from each aromatic nucleus which are coaxial or parallel and oppositely directed, the orientation of said fibers being characterized by an orientation angle of less than about 45*, said fibers having an intial modulus of at least about 300 grams per denier.
15. Fiber of claim 14 wherein said orientation is further characterized by a sonic velocity of at least about 4.0 km./sec. and said fiber has a tenacity of at least about 5 grams per denier.
16. Fiber of claim 1 wherein the polymer of the fiber is a homopolyamide.
(Source: IFI)


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