One-step method production process of ultra-low contract terylene industry fiber

Abstract

The invention discloses an one-step production technology of ultra-low shrinkage terylene industrial fibers, which comprises the steps as follows: A. the preparation of high-viscosity chips: the high-viscosity chips with the viscosity of 0.99 plus or minus 0.015 are obtained by the solid phase polymerization of low-viscosity chips; B. melt spinning: the high-viscosity chips are extruded by melting by a screw extruder in a spinning manifold, spun by a spinning component, and shaped by lateral blowing cooling, and pump oiling is carried out by adopting an ester leveling agent with the kinematic viscosity of 20 to 60mm<2> / s at the temperature of 30 DEG C, and the oiling rate is 0.6 plus or minus 0.15 percent; C. heat setting by drawing: heat setting by drawing is carried out firstly by a pre-tension roller, and sequentially by two groups of drawing rollers and three groups of hot rollers for shaping; and D. shaping by winding: products can be obtained by winding by a winding head after the obtained fibers pass through a main network device. In the invention, not only the technology has high production efficiency, but also the dry heat shrinkage value of the obtained ultra-low shrinkage terylene industrial fibers is low and has high strength and excellent combination property.

Description

technical field [0001] The invention relates to a one-step production process of ultra-low shrinkage polyester industrial fibers, which are especially suitable for coating waterproof fabrics and belong to the technical field of industrial fibers. Background technique [0002] Polyester industrial fiber has become a product due to its high strength, high modulus, high temperature resistance and other excellent properties [0003] The main raw material of industrial textiles, especially in the application of industrial coated waterproof fabrics, polyester industrial fibers have shown their strong advantages. [0004] In recent years, with the application of coated waterproof fabrics and the development of production technology, polyester [0005] The performance indicators of industrial fibers put forward higher requirements, mainly because the dry heat shrinkage level of ultra-low shrinkage polyester industrial fibers cannot meet the high-temperature coating process in the p...

AI Technical Summary

Problems solved by technology

[0006] According to the requirements of the coated fabric industry, when used to weave wide-width waterproof coated fabrics at 190°C, 15min, and 0.01g / d, the dry heat shrinkage value should be below 2%, and the uniformity should be controlled at ±0.3%. However, the dry heat shrinkage of ultra-low shrinkage polyester industrial fibers produced by one-step method is about 2.5% (190°C, 15min, 0.01g / d), which cannot meet the requirements

In foreign countries such as Korea Husung, Netherlands Acordice and other companies use two-step process to produce this variety, but the two-step production process has low speed, long process, backward equipment, and the product is far inferior to the one-step process except for low dry heat shrinkage. Craft products, while the production efficiency is far lower than the one-step process, and the production cost is much higher than the one-step process

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