Reinforcing ply for articles made of an elastomeric material, preferably for pneumatic vehicle tyres, and pneumatic vehicle tyre

• US 20190308453A1
• Filed: 05/08/2017
• Published: 10/10/2019
• Est. Priority Date: 06/09/2016
• Status: Active Application

• Current Assignee: Continental Reifen Deutschland GmbH (Continental AG)
• Original Assignee: Continental Reifen Deutschland GmbH (Continental AG)
• Inventors: REESE, Wolfgang, KRAMER, Thomas
• Application Number:
  US16/307,948
• Publication Number:
  US 20190308453A1
• Time in Patent Office: Days
• CPC Class Codes: B60C 15/0632 using flippers in contact with and wrapped around the bead core and, at least partially, in contact with the bead filler
• CPC Class Codes: B60C 15/0635 using chippers between the carcass layer and chafer rubber wrapped around the bead
• CPC Class Codes: B60C 2009/0071 characterised by special physical properties of the reinforcements
• CPC Class Codes: B60C 2009/0078 Modulus
• CPC Class Codes: B60C 2009/0092 Twist structure
• CPC Class Codes: B60C 2009/2074 Physical properties or dimension of the belt cord
• CPC Class Codes: B60C 2009/2077 Diameters of the cords; Linear density thereof
• CPC Class Codes: B60C 2009/208 Modulus of the cords
• CPC Class Codes: B60C 2009/2083 Density in width direction
• CPC Class Codes: B60C 2009/2096 Twist structures
• CPC Class Codes: B60C 2015/0689 Cord density in width direction
• CPC Class Codes: B60C 9/0042 Reinforcements made of synthetic materials
• CPC Class Codes: C08J 5/046 with synthetic macromolecular fibrous material
• CPC Class Codes: D02G 3/26 with characteristics dependent on the amount or direction of twist
• CPC Class Codes: D02G 3/48 Tyre cords tyre reinforcements B60C9/00; metal cords for reinforcing rubber or plastic articles D07B1/0606
• CPC Class Codes: D06M 15/693 with natural or synthetic rubber, or derivatives thereof
• CPC Class Codes: D07B 1/0606 Reinforcing cords for rubber or plastic articles
• CPC Class Codes: D07B 1/162 characterised by a plastic or rubber enveloping sheathing
• CPC Class Codes: D07B 2501/2046 Tire cords

Abstract

The invention relates to a rubberized reinforcing ply for articles made of elastomeric material, preferably for vehicle tires, where the reinforcing ply has a multiplicity of parallel strengthening elements spaced apart from one another, with each strengthening element consisting of polyamide 6.6 and having an x1 construction, hence being a twisted multifilament yarn of polyamide 6.6. The crude yarn of polyamide 6.6 has a tenacity which, at an elongation of 4%, is within a range from 1.35 cN/dtex to 1.60 cN/dtex; the multifilament yarn has a tenacity which, at an elongation of 4%, is within a range from 2.0 cN/dtex to 2.8 cN/dtex, and the cord has a thermal shrinkage at 177° within a range of 4.0%-7.0%, wherein the tenacity in accordance with ASTM D885-16 and the thermal shrinkage at 77° C. are determined under a pre-tension of 0.045 g/dtex with an exposure time of two minutes.

Claims

1-9. -9. (canceled)

10. A rubberized reinforcing ply for articles made of elastomeric material, wherein the reinforcing ply comprises a multiplicity of parallel strengthening elements spaced apart from one another, wherein each strengthening element consists of polyamide 6.6 and has an x1 construction, hence being a twisted multifilament yarn of polyamide 6.6;

wherein a crude yarn of polyamide 6.6 forming the twisted multifilament yarn of polyamide 6.6 has a tenacity which, at an elongation of 4%, is within a range from 1.35 cN/dtex to 1.60 cN/dtex;

wherein the multifilament yarn after twisted, dipped and hot-stretched, has a tenacity which, at an elongation of 4%, is within a range from 2.0 cN/dtex to 2.8 cN/dtex, and wherein the multifilament yarn has a thermal shrinkage at 177°

within a range of 4.0%-7.0%; and

,

wherein the tenacity, measured in accordance with ASTM D885-16, and the thermal shrinkage at 177°

C. are determined under a pre-tension of 0.045 g/dtex with an exposure time of two minutes.

11. The reinforcing ply as claimed in claim 10, wherein the multifilament yarn has a linear density of from 300 to 4000 dtex.

12. The reinforcing ply as claimed in claim 10, wherein a twist factor a of the multifilament yarn is within a range from 35 to 45, and wherein α

=twist [t/m]·

(linear density [tex]/1000)^1/2 .

13. The reinforcing ply as claimed in claim 10, wherein the raw yarn of polyamide 6.6 has a tenacity which, at an elongation of 4%, is within a range from 1.35 cN/dtex to 1.50 cN/dtex.

14. The reinforcing ply as claimed in claim 13, wherein the multifilament yarn has a linear yarn density of 940 dtex, in that the yarn has a tenacity which, at an elongation of 4%, is within a range from 2.0 cN/dtex to 2.8 cN/dtex, and wherein the multifilament yarn is arranged in the reinforcing ply in a density of up to 210 epdm.

15. The reinforcing ply as claimed in claim 13, wherein the multifilament yarn has a linear yarn density of 1400 dtex, wherein the yarn has a tenacity which, at an elongation of 4%, is within a range from 2.0 cN/dtex to 2.8 cN/dtex, and wherein the multifilament yarn is arranged in the reinforcing ply in a density of up to 180 epdm.

16. The reinforcing ply as claimed in claim 10, wherein the multifilament yarn has a thermal shrinkage at 177°

in a range of 5.0%-6.5%.

17. The reinforcing ply as claimed in claim 10, wherein the reinforcing ply is a bead reinforcement such as a chipper or flipper.

18. A pneumatic vehicle tire which has a reinforcing ply as claimed in claim 10.