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High-strength high-stretch polyester tire cord yarn manufacturing method, cord yarn and cord

A technology of tire cords and cords, which is applied in the field of cords to achieve high strength and tensile properties

Active Publication Date: 2013-08-07
KOLON NANJING SPECIAL TEXTILE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In recent years, the utilization rate of HMLS in medium and high-end car tires at home and abroad has increased rapidly, and the performance is getting better and better, but there is still room for improvement in quality

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] A component is commercially available from Sinopec Shanghai Petrochemical Co., Ltd. polyethylene terephthalate, and B component is commercially available from DuPont's polyamide 66, and A component IV is promoted to 1.237, the RV of component B is 3.159, the two chips are mixed according to the proportion (component A: 95% by weight, component B: 5% by weight) and melt-spun through the spinning machine, the spinning temperature is 290 ° C, the spinning The speed is 3050 m / min, the stretching ratio (2nd stretching) is 2.5, and the 2nd stretching temperature is 230°C. After measurement, the breaking strength of the original silk was 9.34g / d, and the breaking elongation was 16.3%. After twisting and dipping, the breaking strength of the cord is 26.9kg, and the breaking elongation is 15.9%.

Embodiment 2

[0019] A component is commercially available from Sinopec Shanghai Petrochemical Co., Ltd. polyethylene terephthalate, and B component is commercially available from DuPont's polyamide 66, and A component IV is promoted to 1.229, the RV of component B is 3.134, the two chips are mixed according to the proportion (component A: 93% by weight, component B: 7% by weight) and melt-spun through the spinning machine, the spinning temperature is 290 ° C, the spinning The speed is 3050 m / min, the stretching ratio (2nd stretching) is 2.6, and the 2nd stretching temperature is 240°C. After measurement, the breaking strength of the original silk was 9.40g / d, and the breaking elongation was 15.9%. After twisting and dipping, the breaking strength of the cord is 26.6kg, and the breaking elongation is 15.3%.

Embodiment 3

[0021] A component is commercially available from Sinopec Shanghai Petrochemical Co., Ltd. polyethylene terephthalate, and B component is commercially available from DuPont's polyamide 66, and A component IV is promoted to 1.229, the RV of component B is 3.134, the two chips are mixed in proportion (component A: 90% by weight, component B: 10% by weight) and melt-spun through a spinning machine, the spinning temperature is 290°C, and the spinning The speed is 3050 m / min, the stretching ratio (2nd stretching) is 2.6, and the 2nd stretching temperature is 245°C. It was determined that the breaking strength of the original silk was 9.38 g / d, and the elongation at break was 15.4%. After twisting and dipping, the breaking strength of the cord is 25.8kg, and the breaking elongation is 15.0%.

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Abstract

The invention relates to a high-strength high-stretch polyester tire cord yarn manufacturing method which includes the steps: rising an A component IV to be higher than 1.2 and rising a B component RV to be higher than 3.0 by a drying device; melting and spinning proportionally and sufficiently mixed slices by a spinning machine; and stretching, winding and network the slices to obtain the yarn. The spinning temperature is 280-295 DEG C, the winding speed is higher than 3000 meters per minute, the stretching ratio is 2.5-3.5, the stretching temperature is 230-250 DEG C, the B component is polyamide, the A component is polyethylene terephthalate, polytrimethylene terephthalate, polybutylene terephthalate or modified polyethylene terephthalate, the content of the B component is 5-10wt%, and the content of the A component is 90-95wt%. The breaking strength of the cord yarn is higher than 9.0g / d, and the breaking elongation of the cord yarn is higher than 15%. The breaking strength of a cord made of the cord yarn is higher than 25kg, and the breaking elongation of the cord is higher than 15% under the level of 1500d / 2p.

Description

[0001] technical field [0002] The invention relates to a method for manufacturing high-strength and high-stretch polyester tire cord precursors containing polyamide, cord precursors produced by the method and cords made from the cord precursors. Background technique [0003] Starting from cotton cord, rayon was used in 1938, and the first synthetic fiber nylon was used in 1950. After that, new cord materials such as polyester and glass fiber appeared one after another. DuPont launched aramid fiber at the end of 1969 under the trade name of "B fiber". After repeated improvements, it was sold under the trade name of "Kevlar". Tire manufacturers use "Kevlar" as a new tire cord material, which actually started in the 1970s. [0004] The carcass frame material plays an important role in tire characteristics such as high-speed performance, durability and handling. At present, the framework materials of car radial tires are mainly three categories: rayon, nylon (polyamide) and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01D5/08D01D5/12D02G3/48D01F6/92D01F1/10
Inventor 吴伟
Owner KOLON NANJING SPECIAL TEXTILE