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Polyester cap ply strip

A technology of cap ply and belt ply, which is applied to the reinforcement layer of pneumatic tires, tires, household appliances, etc., and can solve problems such as layer separation

Inactive Publication Date: 2018-07-31
KORDSA TEKNIK TEKSTIL AS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, high epdm cap layers have a higher tendency to form cracks, which can lead to layer separation

Method used

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  • Polyester cap ply strip
  • Polyester cap ply strip
  • Polyester cap ply strip

Examples

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Effect test

Embodiment Construction

[0057] According to the present invention, a cap ply or cap ply strip wound helically in the circumferential direction on a belt assembly of a pneumatic radial tire, with alternating polyester (PET) warp cords of different twist levels;

[0058] - Improved high-speed durability due to high modulus of low-twisted PET cords, and increased cord-to-cord distance between cords (less shear stress) (cord displacement in vertical direction bit, forming a double layer or zigzag)( Figure 3a , 3b and 5);

[0059] -improved impact resistance of belt assemblies due to higher energy absorption of high twist and highly extensible PCT cords; and

[0060] -Improved resistance to tread-cap separation due to the corrugated surface structure of the cap. The serrated surface also enhances the mechanical bond between the cap ply and the tread compound.

[0061] The first PET cord (A) and the second PET cord (B) in the band ply strip are double and / or triple cords.

[0062] The angle of the heli...

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Abstract

The invention relates to a novel tire cord fabric or strip comprising alternating parallel polyethylene terephthalate (PET) cords having different twist lengths. Such a novel tire cord fabric or stripimproves high speed durability, tread separation resistance and impact resistance when used as zero degree spirally wound cap ply in pneumatic radial tires.

Description

field of invention [0001] The present invention relates to a novel tire cord or strip comprising alternating parallel polyester cords with different twists. This novel tire cord or bar improves high speed durability, tread separation resistance and impact resistance when used as a zero degree helically wound cap ply on a belt package in a pneumatic radial tire sex. Background of the invention [0002] Under high speed conditions, the outer diameter of the tire increases due to the centrifugal force generated by the steel cord belt assembly and the tread. This diameter increase or tire enlargement increases the scaling motion of the belt edge cords, leading to crack initiation, crack propagation and eventual belt edge separation. [0003] On the other hand, an increase in temperature at the belt edge under high-speed conditions may lead to a deterioration in the local adhesion of the textile-type cap strips and lead to localized cap-tread separation, which may subsequently ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60C9/00
CPCB60C9/2204B60C2009/0092B60C2009/2214B60C2009/2257B60C2009/2285B60C2009/2295B29D30/38B60C9/005
Inventor M.S.菲丹
Owner KORDSA TEKNIK TEKSTIL AS
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