The present invention relates to a wrapped cord, to a method of making said wrapped cord, to a method of treating said wrapped cord with an adhesive treatment composition, to the treated wrapped cord obtainable by said method as well as to a reinforced rubber article comprising said treated cord, such as automotive tires.
1. A wrapped cord comprising a core bundle of organic filaments having a modulus of about 60 to about 500 cN/dtex and a wrap helically wound around said core bundle of filament in a spaced manner, wherein the wrap material has a free shrinkage at 100° C. being at least 10% higher than the free shrinkage of the core filaments.
2. The wrapped cord of claim 1 , wherein the organic core filaments have a tensile strength of about 5.0 to about 15 cN/dtex.
3. The wrapped cord of claim 1 , wherein the organic core filaments have a dtex of about 1.0 to about 10.0 dtex.
4. The wrapped cord of claim 1 , wherein the core bundle of filaments comprises about 200 to about 2,000 filaments.
5. The wrapped cord of claim 1 , wherein the organic core filaments are made of an organic material selected from the group consisting of aliphatic polyesters, aromatic polyesters and aliphatic polyamides.
6. The wrapped cord of claim 1 , wherein the wrap comprises at least one filament.
7. The wrapped cord of claim 6 , wherein the wrap has a dtex that is from 5 to 40% of the dtex of the organic core filaments dtex.
8. The wrapped cord of claim 1 , wherein the wrap has a hot air shrinkage of about 10 to about 60% in hot air at 100° C.
9. The wrapped cord of claim 1 , wherein the material of filaments of the wrap is selected from the group consisting of aliphatic polyesters, aromatic polyesters and aliphatic polyamides.
10. The wrapped cord of claim 9 , wherein the polyester is selected from the group consisting of polyethylene terephthalate, polyethylene naphthalate, polyethylene bibenzoate, polytrimethylene terephthalate, polytrimethylene naphthalate, polytrimethylene bibenzoate, polybutylene terephthalate, polybutylene naphthalate and polybutylene bibenzoate or polyesters made from mixtures of the individual monomers.
11. The wrapped cord of claim 9 , wherein the polyamide is selected from the group consisting of PA 6, PA 6.6 and PA 4.6.
12. The wrapped cord of claim 1 , wherein the filaments of the wrap have the following further properties:
a modulus of about 20 to about 150 cN/dtex and
a tenacity of about 2.0 to about 12.0 cN/dtex.
13. The wrapped cord according to claim 1 , wherein the organic filaments are made of at least one polyester.
14. The wrapped cord according to claim 1 and comprising a core bundle of organic filaments and a low dtex, high shrinkage organic fiber wrap.
15. The wrapped cord according to claim 14 , wherein the number of wrap turns per meter of core bundle is from about 100 to about 500 for a 2,200 dtex polyester core yarn.
16. The wrapped cord according to claim 15 , wherein the number of wrap turns per meter of core bundle is from about 200 to about 400 for a 2,200 dtex polyester core yarn.
17. The wrapped cord according to claim 15 , wherein the number of wrap turns per meter of core bundle is from 250 to 350 for a 2200 dtex polyester core yarn.
18. The wrapped cord of claim 5 , wherein the organic core filaments are made of at least one polyester.
19. A wrapped cord comprising a core bundle of organic filaments having a modulus of abut 60 to about 500 cN/dtex and a wrap helically wound around said core bundle of filaments in a spaced manner, wherein the wrap material has a free shrinkage at 100° C. being at least 10% higher than the free shrinkage of the core filaments and shrunk by exposing the wrapped cord to an elevated temperature.
20. The wrapped cord of claim 19 , wherein the organic core filaments have a tensile strength of about 5.0 to about 15 cN/dtex.
21. The wrapped cord of claim 19 , wherein the organic core filaments have a dtex of about 1.0 to about 10.0 dtex.
22. The wrapped cord of claim 19 , wherein the core bundle of filaments comprises about 200 to about 2,000 filaments.
23. The wrapped cord of claim 19 , wherein the organic core filaments are made of an organic material selected from aliphatic polyesters, aromatic polyesters and aliphatic polyamides.
24. The wrapped cord of claim 19 , wherein the wrap comprises at least one filament.
25. The wrapped cord of claim 21 , wherein the wrap dtex is from 5 to 40% of the dtex the organic core bundle dtex.
26. The wrapped cord of claim 19 , wherein the wrap filaments have a hot air shrinkage of about 10 to about 60% in hot air at 100° C.
27. The wrapped cord of claim 19 , wherein the material of the wrap is selected from aliphatic polyesters, aromatic polyesters and aliphatic polyamides.
28. The wrapped cord of claim 27 , wherein the polyester is selected from the group consisting of polyethylene terephthalate, polyethylene naphthalate, polyethylene bibenzoate, polytrimethylene terephthalate, polytrimethylene naphthalate, polytrimethylene bibenzoate, polybutylene terephthalate, polybutylene naphthalate and polybutylene bibenzoate or polyesters made from mixtures of the individual monomers.
29. The wrapped cord of claim 27 , wherein the polyamide is selected from the group consisting of PA 6, PA 6.6 and PA 4.6.
30. The wrapped cord of claim 19 , wherein the wrap material has filaments which have the following further properties:
a modulus of about 20 to about 150 cN/dtex and
a tenacity of about 2.0 to about 12.0 cN/dtex.
31. The wrapped cord according to claim 19 , wherein the core bundle comprises organic filaments and a wrap is helically wound around the bundle of organic filaments wherein the number of wrap turns per meter of core bundle is from about 100 to 500 for a 2200 dtex polyester core bundle.
32. The wrap according to claim 19 , wherein the number of wrap times per meter of core bundle is from 200 to 400 for a 2200 dtex polyester core bundle.
33. The wrapped cord according to claim 19 , wherein the number of wrap turns per meter of core bundle is from 250 to 350 for a 2200 dtex polyester core bundle.
34. The wrapped cord of claim 23 , wherein the organic core filaments are made from at least one polyester.