Process for improving strength of polyester cord in impregnation process

Abstract

The invention provides a process for improving the strength of a polyester cord in the impregnation process. The ratio is reasonable, and a strength improving effect is good. According to the technical scheme, the strength of the polyester cord is improved by adding polymer and nanoparticles, the mass ratio of the polymer to the nanoparticles is 80:0.2, the viscosity of the polyester cord is 0.5, the strength is more than or equal to 10Cn / dtex, dry heat shrinkage is less than or equal to 5.0 percent after 1 minute at the temperature of 168 DEG C and the pre-tension of 0.04Cn / dtex, and a high-strength high-modulus low-shrinkage polyester cord is prepared by pre-crystallizing a composite material of the polymer and the nanoparticles at the temperature of 130 DEG C for 3 hours, performing solid phase reaction at the temperature of 180 DEG C under the pressure of 40Pa for 20 hours, winding the composite material at a rate of 400m / min, and lengthening by four times. Product quality is improved, the service life of a tire is prolonged, and the process is suitable for generalization and use.

Description

Technical field: [0001] The invention relates to the technical field of tire manufacture, in particular to a process for improving the strength of polyester cords during the dipping process. Background technique: [0002] At present, the polyester cord used in the manufacture of tires adopts traditional production methods, which will degrade in high strength, heat resistance, moisture resistance and dry heat conditions, especially radial tires will generate heat after high-speed operation. Ordinary With the increase of temperature, the modulus and strength of industrial yarn will drop rapidly, and a series of serious quality problems will be caused due to insufficient strength, which cannot meet the requirements of industrial production. How to improve the strength of polyester cord during the dipping process so as to reduce the huge economic loss caused by the loss of strength in the production process is a technical problem that people urgently need to solve. Contents of...

AI Technical Summary

Problems solved by technology

[0002] At present, the polyester cord used in the manufacture of tires adopts traditional production methods, which will degrade in high strength, heat resistance, moisture resistance and dry heat conditions, especially radial tires will generate heat after high-speed operation. Ordinary As the temperature increases, the modulus and strength of industrial yarn will drop rapidly, and a series of serious quality problems will be caused due to insufficient strength, which cannot meet the requirements of industrial production.