Two-component loop yarns comprising aramid filaments, manufacture thereof and use thereof

• US 5,645,935 A
• Filed: 12/05/1995
• Issued: 07/08/1997
• Est. Priority Date: 12/07/1994
• Status: Expired due to Fees

• Current Assignee: Arteva North America S.A.R.L (KOCH Industries Incorporated)
• Original Assignee: Hoechst Trevira GmbH & Co. KG (Sanofi )
• Inventors: Kemper, Wilbert, Neuert, Richard
• Primary Examiner(s): EDWARDS, NEWTON O
• Application Number:
  US08/567,289
• Time in Patent Office: 581 Days
• Field of Search: 428/395, 428/370, 428/373, 428/369, 428/399, 57/6, 57/247, 57/903
• US Class Current: 428/370
• CPC Class Codes: D01F 6/805 from aromatic copolyamides
• CPC Class Codes: D02G 1/165 characterised by the use of certain filaments or yarns
• CPC Class Codes: D02G 3/46 Sewing-cottons or the like
• CPC Class Codes: D10B 2331/021 aromatic polyamides, e.g. aramides
• CPC Class Codes: Y10S 57/903 Sewing threads
• CPC Class Codes: Y10T 428/2922 Nonlinear [e.g., crimped, coiled, etc.]
• CPC Class Codes: Y10T 428/2924 Composite
• CPC Class Codes: Y10T 428/2969 Polyamide, polyimide or polyester
• CPC Class Codes: Y10T 428/2976 Longitudinally varying

Abstract

Two-component loop yarns are composed of core and effect filaments, at least part of the core component consisting of aromatic polyamides, wherein the aromatic polyamides contain the structural repeat units of the formulae I and II

--OC--Ar.sup.1 --CO--NH--Ar.sup.2 --NH--                   (I)

--OC--Ar.sup.1 --CO--NH--Ar.sup.3 --NH--                   (II),

where Ar¹, Ar² and Ar³ are each independently of the others a bivalent mono- or polycyclic aromatic radical whose free valences are disposed para or meta or comparably parallel, coaxial or angled to each other, and Ar² and Ar³ each have different individual meanings within the scope of the given definitions, and the respective monomer components underlying the polymer are selected so as to produce an aromatic polyamide which forms preferably isotropic solutions in organic solvents.

Claims

1. A two-component loop yarn comprising core filaments and effect filaments, at least part of the core filaments consisting of aromatic copolyamides, wherein the aromatic copolyamides contain the structural repeat units of the formula I and II

View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)

2. The two-component loop yarn of claim 1 wherein the aromatic copolyamide has two structural repeat units of the formula III and IV or of the formula III and VI or of the formula III, IV and V or of the formula III, IV, and VI or of the formula IV, V and VI ##STR2## where Ar¹ and Ar⁴ are independently of each other a bivalent mono- or polycyclic aromatic radical whose free valences are disposed para or comparably parallel or coaxial to each other, and are in particular monocyclic or bicyclic aromatic radicals,

Ar⁵ and Ar⁶ are each independently of the other a bivalent mono- or polycyclic aromatic radical whose free valences are disposed para or comparably parallel or coaxial to each other, or where Ar⁶ additionally may be a bivalent mono- or polycyclic aromatic radical whose free valences are disposed meta or comparably angled to each other,

Q is a C--C bond or a group of the formula --O--, --S--, --SO₂ --, --O-phenylene-O-- or alkylene,

Ar⁷ and Ar⁸ each have one of the meanings defined for Ar⁵ and Ar⁶,

Y has one of the meanings defined for Q or may additionally be a group of the formula --HN--CO--, and

X is a group of the formula --O--, --S-- or in particular --NR¹ --, where R¹ is alkyl, cycloalkyl, aryl, aralkyl or in particular hydrogen.

3. The yarn of claim 2 wherein the aromatic copolyamide has the structural repeat units of the formula III, IV and V where Ar¹ is 1,4-phenylene, Ar⁴ is 1,4-phenylene or a bivalent radical of 4,4'"'"'-diaminobenzanilide, Ar⁵, Ar⁶ and Ar⁷ are each 1,4-phenylene, Ar⁸ is 1,3-phenylene, Q is --O-1,4-phenylene-O-- and Y is --O--;

and in particular the proportions of the structural repeat units of the formula III, IV and V vary within the following ranges, based on the total amount of these structural units;

structural repeat unit of the formula III;

40-60 mol %,

structural repeat unit of the formula IV;

1-20 mol %, and

structural repeat unit of the formula V;

15-40 mol %.

4. The yarn of claim 2 wherein the aromatic copolyamide has the structural repeat units of the formula III, IV and V where Ar¹ is 1,4-phenylene, Ar⁴ is 1,4-phenylene or a bivalent radical of 4,4'"'"'-diaminobenzanilide, Ar⁵ and Ar⁶ are each 1,4-phenylene, Ar⁷ and Ar⁸ are each methyl-substituted 1,4-phenylene, Q is --O-1,4-phenylene-O-- and Y is a C--C bond;

and in particular the proportions of the structural repeat units of the formula III, IV and V vary within the following ranges, based on the total amount of these structural units;

structural repeat unit of the formula III;

10-30 mol %,

structural repeat unit of the formula IV;

10-30 mol %, and

structural repeat unit of the formula V;

10-60 mol %.

5. The yarn of claim 2 wherein the aromatic copolyamide has the structural repeat units of the formula III, IV and V where Ar¹ is 1,4-phenylene, Ar⁴ is 1,4-phenylene or a bivalent radical of 4,4'"'"'-diaminobenzanilide, Ar⁵ and Ar⁶ are each 1,4-phenylene, Ar⁷ and Ar⁸ are each methyl-substituted 1,4-phenylene, Q is --O-- and Y is a C--C bond;

and in particular the proportions of the structural repeat units of the formula III, IV and V vary within the following ranges, based on the total amount of these structural units;

structural repeat unit of formula III;

10-30 mol %,

structural repeat unit of formula IV;

10-50 mol %, and

structural repeat unit of formula V;

10-60 mol %.

6. The yarn of claim 2 wherein the aromatic copolyamide has the structural repeat units of the formula III and IV where Ar¹ is 1,4-phenylene, Ar⁴ is 1,4-phenylene or a bivalent radical of 4,4'"'"'-diaminobenzanilide, Ar⁵ is 1,4-phenylene, Ar⁶ is 1,3-phenylene and Q is --O--;

and in particular the proportions of the structural repeat units of the formula III and IV vary within the following ranges, based on the total amount of these structural units;

structural repeat unit of the formula III;

20-50 mol %, and

structural repeat unit of the formula IV;

40-60 mol %.

7. The yarn of claim 2 wherein the aromatic copolyamide has the structural repeat units of the formula III and VI where Ar¹ is 1,4-phenylene, Ar⁴ is 1,4-phenylene or a bivalent radical of 4,4'"'"'-diaminobenzanilide and X is --NH--;

and in particular the proportions of the structural repeat units of the formula III and VI vary within the following ranges, based on the total amount of these structural units;

structural repeat unit of the formula III;

20-70 mol %, and

structural repeat unit of the formula VI;

20-70 mol %.

8. The yarn of claim 2 wherein the aromatic copolyamide has the structural repeat units of the formula III, IV and VI where Ar¹ is 1,4-phenylene, Ar⁴ is 1,4-phenylene or a bivalent radical of 4,4'"'"'-diaminobenzanilide, Ar⁵ is 1,4-phenylene, Ar⁶ is 1,4- or 1,3-phenylene, Q is --O-- or --O-1,4-phenylene-O-- and X is --NH--;

and in particular the proportions of the structural repeat units of the formula III, IV and VI vary within the following ranges, based on the total amount of these structural units;

structural repeat unit of formula III;

10-30 mol %,

structural repeat unit of the formula IV;

10-40 mol %, and

structural repeat unit of the formula VI;

30-70 mol %.

9. The yarn of claim 2 wherein the aromatic copolyamide has the structural repeat units of the formula IV, V and VI where Ar¹ is 1,4-phenylene, Ar⁵ is 1,4-phenylene, Ar⁶ is 1,4-phenylene or 1,3-phenylene, Q is --O-- or --O-1,4-phenylene-O--, Ar⁷ and Ar⁸ are each methyl-substituted 1,4-phenylene, Y is a direct C--C bond, and X is --NH--;

and in particular the proportions of the structural repeat units of the formula IV, V and VI vary within the following ranges, based on the total amount of these structural units;

structural repeat unit of the formula IV;

10-40 mol %,

structural repeat unit of the formula V;

20-60 mol %, and

structural repeat unit of the formula VI;

30-70 mol %.

10. The two-component loop yarn of claim 1 having a yarn linear density of from 100 to 1000 dtex.

11. The two-component loop yarn of claim 1 whose tenacity is more than 50 cN/tex.

12. The two-component loop yarn of claim 1 having an elongation at break is below 4%.

13. The two-component loop yarn of claim 1 having a tenacity of more than 50 cN/tex and an elongation at break of below 4%.