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

A production process and technology for industrial fibers, applied in the field of industrial fibers, can solve the problems of low production process speed, inability to meet requirements, low production efficiency, etc., and achieve the effects of eliminating internal stress, reducing shrinkage, ensuring stability, and improving drawing efficiency.

Active Publication Date: 2009-04-15
ZHEJIANG UNIFULL IND FIBER
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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
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  • One-step method production process of ultra-low contract terylene industry fiber

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specific Embodiment 1

[0026] Concrete embodiment 1 of the present invention: the one-step production process of ultra-low shrinkage polyester industrial fiber of the present invention comprises the following steps:

[0027] A. Preparation of high-viscosity slices: Low-viscosity slices are subjected to solid-state polymerization to obtain high-viscosity slices with a viscosity of 0.99±0.015, control carboxyl content ≤ 16, dust content ≤ 100ppm, moisture content ≤ 40ppm;

[0028] B. Melt spinning: The high-viscosity chips are melted and extruded by the screw extruder to become a high-viscosity melt, which is metered into the spinning box 1 by a metering pump. The pressure before the metering pump is 55-75Bar, and the high-viscosity melt enters The spinning assembly 2 carries out high-pressure spinning with 6 or 12 heads. The filaments are slowly cooled by a slow cooler at a temperature of 300-400°C, cooled by side air blowing, and then formed with a flow viscosity of 20-60mm at 30°C. 2 / s ester smoot...

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Abstract

The invention discloses a 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...

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Application Information

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IPC IPC(8): D01D5/08D01D5/088D01D5/096D01D5/12D01D5/00D01D1/00D01F6/62
Inventor 茅惠新
Owner ZHEJIANG UNIFULL IND FIBER
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