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A dipped cord using hybrid cord and a radial tire using the same

A technology for dipping cords and radial tires, applied in the field of radial tires, can solve the problems of low wettability elastic coefficient, poor fatigue resistance of solvent-processed cellulose fibers, and poor adhesion.

Inactive Publication Date: 2011-04-27
HYOSUNG CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this polynaphthalate fiber is superior in strength compared with rayon, its application range is limited due to its poor adhesion to rubber
[0006] Compared with polyester fibers, solvent-process cellulose fibers have excellent adhesion to rubber, and compared with rayon, solvent-process cellulose fibers are extremely excellent in terms of elastic modulus, but solvent-process cellulose fibers have poor fatigue resistance. Shortcomings
[0007] In order to solve this defect, although it is possible to use rayon which is superior in elongation than solvent-process cellulose fibers, this rayon has the disadvantage of a slightly lower wettability modulus of elasticity.

Method used

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  • A dipped cord using hybrid cord and a radial tire using the same
  • A dipped cord using hybrid cord and a radial tire using the same
  • A dipped cord using hybrid cord and a radial tire using the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0088]In order to produce fibers for tire reinforcement, solvent-process cellulose fibers and rayon are produced, respectively, according to the above-mentioned method. After 1 artificial (1500D, Cordenka700) is pre-twisted with 40TPM, the 1 artificial (1500D, Cordenka700) and the untwisted 1 solvent-process cellulose fiber (1500D) that have been added are added respectively. The twist of 420TPM twist is used to make the first twisted yarn, and then two of the first twisted yarns are paralleled, and the double twist of 420TPM is added to make the raw cord.

[0089] The obtained composite raw cord was dried at 100° C. for 130 seconds, and then passed through an adhesive liquid prepared as follows to coat the adhesive liquid. When drying, a stretch of 2% was imparted to prevent deformation of the green cord due to heat shrinkage.

[0090] 29.4% by weight resorcinol 45.6 parts by weight

[0091] 255.5 parts by weight of pure water

[0092] 37% formalin 20 parts by weight

[0...

Embodiment 2

[0101] Except for pretwisting rayon (1500D, Cordenka700) with a twist of 80 TPM, the experiment was carried out in the same manner as in Example 1 to manufacture raw cords and treated cords. The physical properties of the thus-produced dipped cords were evaluated, and the evaluation results are shown in Table 1.

Embodiment 3

[0103] In addition to adding 1 artificial (1500D, Cordenka700) and 1 solvent-based cellulose fiber (1500D) to the twist of 360TPM and 420TPM twists respectively to make primary twisted filaments, and then paralleling the 2 primary twisted filaments, adding 420TPM at the same time The double twisting of the twist was carried out in the same manner as in the above-mentioned Example 1 except for the production of the raw cords, and the raw cords and the treated cords were produced. The physical properties of the thus-produced dipped cords were evaluated, and the evaluation results are shown in Table 1.

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Abstract

The present invention provides a hybrid dipped cord applicable to a tyre layer or a cap ply (belt enhancement ply) for a vehicle inflation radial tyre and the radial tyre using the same. The cord consists of a rayon yarn and solvent-method cellulose fibrils. The cord is produced by the following steps: producing a pre-silk twisting by adding a twisting in an S direction with a twist of 20TPM-200TPM to one rayon yarn, then producing a primary silk twisting by respectively twisting the rayon yarn pre-silk twisting and one solvent-method cellulose fibril without twisting, doubling two primary silk twistings and retwisting simultaneously; or, the cord is produced by the following method: without the operation of pre-twisting, during the primary twisting operation, the twist of the rayon yarn being 20TPM-200TPM lower than that of the solvent-method cellulose fibrils, producing the primary silk twisting by respectively twisting one rayon yarn and one solvent-method cellulose fibril, then doubling the two primary twistings and retwisting simultaneously.

Description

technical field [0001] The present invention relates to a composite cord formed of rayon and solvent-process cellulose (Lyocell) fiber filaments, and a radial tire using the same, the composite cord being suitable for a carcass ply or a crown band of a radial tire for passenger cars layer (belt reinforcement layer). Background technique [0002] In conventional radial tires, the rubber is reinforced with fiber cords such as polyester or rayon in the carcass layer, and the rubber is reinforced with steel cords in the belt layer. In addition, the tire wire (beadwire) to prevent the tire from falling off the rim and maintain stability is reinforced where the tire meets the rim. The tire steel wire also has the function of fixing the carcass. [0003] In the first pneumatic tires, cotton canvas was used as a carcass material. Thereafter, along with the development of rayon, fiber cords such as rayon, nylon, and polyester are now also used as carcass layer materials, and in re...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D02G3/48B60C9/12
CPCB29C70/16B29C70/50B29D30/38
Inventor 权益铉崔秀明房允赫周时奂李泰政
Owner HYOSUNG CORP