Preparation method of gum dipping cord fabric for passenger radial tire

A technology for dipping cord fabrics and radial tires, applied in textiles, single-component polyester rayon, fabrics, etc., can solve the problems of nylon dimensional stability and low cost performance, and achieve high strength and low dry heat shrinkage , cost reduction effect

Pending Publication Date: 2021-09-17
ZHEJIANG HAILIDE NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For ordinary performance tires, nylon has insufficient dimensional stability and cost performance

Method used

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  • Preparation method of gum dipping cord fabric for passenger radial tire
  • Preparation method of gum dipping cord fabric for passenger radial tire
  • Preparation method of gum dipping cord fabric for passenger radial tire

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0025] The preparation method for the dipped cord fabric of passenger radial tire is realized through the following steps:

[0026] (1) Solid state polymerization:

[0027] Using polyester wet chips as raw materials, after heating, the low-molecular terminal hydroxyl and carboxyl groups of the polyester are fully activated, so that chain growth reactions gradually occur between low-molecular chains, and the produced high-viscosity PET slices have a viscosity of 1.19dl / g or more. slice;

[0028] (2) spinning process:

[0029] Melting process: high-viscosity PET chips in N 2 Under protection, the raw material is heated and melted in the range of 280°C to 300°C, and then enters the spinning box, and the temperature of the spinning box is controlled at 280°C to 300°C; high-strength raw silk is produced;

[0030] (3) Twisting process

[0031] The high-strength raw yarn is twisted on the direct twisting machine, the spindle speed is 8500-9000 rpm, the outer tension is 10-20%, th...

Embodiment 1—3

[0040] (1) Solid phase polymerization

[0041] Improved solid phase polymerization process, adopting temperature>210℃, air volume>6800m 3 The technological conditions of high temperature and large air volume per hour promote the activation of the low-molecular terminal hydroxyl and carboxyl groups of the polyester, so that the chain growth reaction between the low-molecular chains proceeds forward, and the molecular weight further increases. See the table below for details:

[0042] Solid phase polymerization process and slice index

[0043]

[0044] By experimenting with different temperature and wind speed adjustments, different effects can be obtained and prepared for the implementation of subsequent steps. After preheating and solid-phase thickening in a continuous solid-phase thickening device, the intrinsic viscosity after PET chip processing is 1.19-1.22dl / g.

Embodiment 4—7

[0046] In step 2 of the preparation:

[0047] (2) Melting process

[0048] Under the protection of N2, the high-viscosity chip raw materials are heated and melted in the range of 280 ° C to 300 ° C, and then enter the spinning box, and the temperature of the spinning box is controlled at 280 ° C ~ 300 ° C; then through the melt distribution pipe , metering pump, spinning assembly, slow cooling, full cooling forming, oiling, multi-stage stretching, heat setting winding and other processes to produce high-strength polyester industrial yarn. See the table below for details:

[0049] Melting temperature and raw silk index

[0050]

[0051]

[0052] Under different melting temperature conditions, the obtained polyester industrial yarns have different strengths; in order to meet the purpose of this application, this application selects a temperature control range that meets the requirements to prepare the indicators of the original yarn.

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Abstract

The invention belongs to the technical field of polymer fiber production, and particularly relates to a preparation method of a gum dipping cord fabric for a passenger radial tire. The preparation method comprises the following steps of through solid-phase polymerization, taking a polyester wet slice as a raw material, and heating to fully activate low-molecular terminal hydroxyl and carboxyl of polyester so as to form a high-viscosity PET slice; then carrying out a spinning procedure of a melting process to produce high-strength protofilaments; twisting the high-strength protofilaments on a direct twisting machine through a twisting process; weaving the twisted re-twisted yarns on an air jet loom; and finally, carrying out a gum dipping process by using a gum dipping solution mainly comprising blocked isocyanate and epoxy resin. The preparation method has the advantages that the produced product is high in strength, good in definite elongation and small in dry heat shrinkage rate, and is used for replacing a conventional 1100dtex/2 product, so that the effects of reducing the cost and enabling the tire to be lighter in weight are achieved.

Description

technical field [0001] The invention belongs to the technical field of polymer fiber production, and in particular relates to a preparation method of 930dtex / 2 dipped cord fabric for passenger radial tires. Background technique [0002] The revolution of tire structure and the improvement of product performance are inseparable from the renewal of skeleton materials. With the urgent demand for high-performance cord in the tire industry, more and more tire companies have begun to pay attention to light weight, low rolling resistance and good heat resistance. skeleton material products. At present, the carcass of semi-steel radial tires is made of polyester or nylon. For ordinary performance tires, nylon has insufficient dimensional stability and cost performance. In addition, for tire companies, reducing the cost of raw materials is very critical. Therefore, the development of fine denier and high-strength dipped cord fabrics has attracted the attention of the market. It c...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C70/52D01F6/92D03D15/283
CPCB29C70/52B29C70/525B29C70/528D01F6/92D03D15/283D10B2331/04
Inventor 王君毅吴警高君潘叶佳马小平费林辉
Owner ZHEJIANG HAILIDE NEW MATERIAL
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