Method for preparing high-modulus super low shrinkage industrial yarn using pyromellitic dianhydride

A pyromellitic acid, ultra-low shrinkage technology, applied in the field of industrial textiles, can solve the problem of equipment and technology relying on imports, and achieve the effects of low thermal shrinkage, fast condensation rate, and improved unevenness

Inactive Publication Date: 2008-11-12
JIANGNAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Moreover, equipment and technology are dependent on imports

Method used

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  • Method for preparing high-modulus super low shrinkage industrial yarn using pyromellitic dianhydride
  • Method for preparing high-modulus super low shrinkage industrial yarn using pyromellitic dianhydride

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Embodiment Construction

[0009] The following examples will further describe the present invention in detail: ordinary PET is pre-crystallized and dried at 120° C. to 130° C. for 6 hours, and sent to a screw extruder. At the same time, a chain extender PDMA is added with a mass fraction of 0.2%. Set the outlet pressure of the screw extruder to 15 MPa, heat through five heating zones, and control the heating temperature of each zone of the screw extrusion to 250°C, 260°C, 270°C, 280°C, and 300°C to gradually soften and melt the polyester. Finally, the melt temperature was controlled at 300°C. The above temperature accuracy is controlled within ±1°C. After the melt is filtered by the RL-472 melt filter, it enters the spinning box through the melt pipeline, and the temperature of the biphenyl boiler is controlled to keep the box temperature at 300±1°C. Carry out spinning and oiling, the spinning speed is 800m / min, adjust the speed of the metering pump according to the winding speed and the specification...

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Abstract

The invention relates to a method that uses equal benzene tetracarboxylic acid anhydride making high modulus ultralow shrinking industrial yarn that includes the following steps: sending normal polyethylene terephthalate or normal polyester precrystallization and drying into screw extruder, adding expanding agent, setting outlet pressure and heating temperature of screw extruder to gain high viscosity polyester melt; putting the polyester melt into spinning box to take spinning to make high modulus ultralow shrinking industrial yarn. By using the method, the device investing and producing cost would be lowered, and the polyester industrial yarn is high intention high modulus and ultralow shrinking.

Description

technical field [0001] The invention relates to the technical field of industrial textiles, and relates to a high-modulus ultra-low shrinkage polyester industrial yarn and a manufacturing method thereof. Background technique [0002] High modulus low shrinkage (HMLS) polyester industrial yarn is one of the most important industrial fibers and has a very wide range of applications. The cord fabric processed with HMLS polyester industrial yarn has excellent properties of high modulus, high fatigue strength, dimensional stability and low heat shrinkage, especially suitable for radial tires. In addition, this kind of polyester industrial yarn also has certain applications in conveyor belts, transmission belts and geotextiles. There are one-step and two-step methods for producing HMLS polyester industrial yarn. Both methods use the high-viscosity polyester high-speed spinning process, and increase the crystallinity and orientation of the fiber by using the high-temperature tens...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01D5/10D01D5/096D01F6/62
Inventor 葛明桥姚峻李永贵
Owner JIANGNAN UNIV
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