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Rubber-reinforcing polyester cord and method for producing the same

A technology for polyester cords and manufacturing methods, applied in the field of crown ply cords, can solve problems such as not necessarily having mechanical properties, and achieve the effects of high elastic rate, heat-resistant bonding and strength retention

Inactive Publication Date: 2007-06-13
TOYOBO CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Therefore, aiming at the problem of heat-resistant adhesiveness of polyethylene terephthalate, the present inventors have proposed a method for producing a polyester fiber material having improved adhesiveness with rubber (refer to Patent Document 3), However, because its specific use is not considered, it may not have the mechanical properties suitable for tire crown ply use

Method used

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  • Rubber-reinforcing polyester cord and method for producing the same
  • Rubber-reinforcing polyester cord and method for producing the same
  • Rubber-reinforcing polyester cord and method for producing the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0068]Polyethylene terephthalate chips with an intrinsic viscosity of 0.95dl / g are melted and sprayed from a spinneret with 190 holes at a spinning temperature of 300°C, passed through a heating zone of 320°C, and then processed by 20 The cooling wind at ℃ cools and solidifies it, draws it at a spinning speed of 550m / min, and then stretches it with a draw ratio of 5.8 times, and imparts sorbitol polyglycidyl ether as an epoxy compound to make it relax. 3.0% after coiling. 2 strands of polyethylene terephthalate precursors (intrinsic viscosity 0.88dl / g, strength 8.3cN / dex) obtained in this way of 1100dex, 190 filaments are ply twisted to obtain a twist number of 47×47(t / 10cm) billet line.

[0069] This cord was immersed in 1 treatment solution, and the cord soaked in the treatment solution was wrung with a squeeze roller with adjusted pressure to remove excess solution. Then, the cords to which the treatment liquid was applied were dried in an oven at 120° C. for 56 seconds ...

Embodiment 2

[0072] In the treatment of Example 1, the relaxation rate during drying and heat treatment after application of the second treatment liquid was changed to -1.0%. The normalized tension at this time is 8.1N / cord (0.37cN / dtex). Except for this, the immersion treatment was performed using the same strand and treatment liquid as in Example 1.

Embodiment 3

[0074] In the treatment of Example 1, the relaxation rate during drying and heat treatment after application of the second treatment liquid was changed to 0%, and the normalized tension at this time was 10.6 N / cord (0.48 cN / dtex). Except for this, the immersion treatment was performed using the same strand and treatment liquid as in Example 1.

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Abstract

It is provided a polyester cord for reinforcement of rubber suitable to the use for tire cap ply where a high elastic modulus is available and heat-resisting adhesive property and strength retaining rate upon exposure to high temperature for long time in rubber are significantly improved and also to provide a method for producing the same. A method for production of polyester cord for reinforcement of rubber, characterized in that , in bestowing adhesive property to rubber on a polyester fiber material, four members of (A) a treating solution containing a carrier, (B) an aqueous solution of a blocked isocyanate, (C) a dispersion of an epoxy compound and (D) a mixed solution of resorcinol-formaldehyde-latex (RFL) are combined as a treating solution and said polyester fiber material is subjected to a treatment by means of a one-stage or two or more multi-stage treatment, wherein said polyester fiber material is treated with a first treating solution compounded at least with (A) a treating solution containing a carrier, then treated with a second treating solution where at least (D) a mixed solution of resorcinol-formaldehyde-latex (RFL) is compounded and, after treating with the second treating solution in the final stage, a thermal treatment under a normalizing tension adjusted to not less than 0.2 cN / dtex is carried out.

Description

technical field [0001] The invention relates to a polyester cord for rubber reinforcement and a manufacturing method thereof. The polyester cord for rubber reinforcement is exposed to high temperature conditions in rubber for a long time, and the heat-resistant adhesion and strength retention rate have been significantly improved. [0002] The rubber-reinforcing polyester cord obtained according to the present invention is suitable for tire cords, especially tire cap ply cords used for the outer layer portion of a reinforcing belt of a radial tire. Background technique [0003] Polyester fibers represented by polyethylene terephthalate have excellent mechanical properties, dimensional stability, and durability, and are widely used in industrial materials, especially tire cords, V-belts, and conveyor belts , hoses and other rubber reinforcement purposes. [0004] When used in tire cords, properties of high strength, high modulus of elasticity, low shrinkage, adhesion and fat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M15/41
CPCB60C9/22D02G3/48B32B2255/28B32B2307/306B60C9/0042B32B25/10D06M15/564D06M15/693B32B25/12B32B2413/00B32B2255/02Y10T428/2913B32B27/36B32B2307/54D06M17/04D06M15/41B32B2262/0276B32B2255/26B32B2307/51B32B27/04
Inventor 小桥正直今冈克利
Owner TOYOBO CO LTD
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