Preparing method for reducing porosity of tire tread rubber
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A tire tread and porosity technology, applied in the field of rubber tires, can solve problems such as high return rate, many pores, and groove cracks, and achieve the effects of increasing service life, increasing tensile strength, and reducing porosity
Active Publication Date: 2019-08-09
JIANGSU GENERAL SCI TECH
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Abstract
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Problems solved by technology
There are many types of tire tread specifications. During the extrusion process, there are often more air holes and a high return rate, which leads to the failure of normal use of the tread and
Method used
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Embodiment 1
[0017] A preparation method for sound-absorbing and noise-reducing tire tread compound, comprising the following steps:
[0018] (a) 100 parts of polyisoprene rubber containing trans-azophenyl groups in the side chain, 50 parts of carbon black N134, 3 parts of zinc oxide, 1 part of stearic acid, 1 part of accelerator NS, and 1 part of antioxidant RD 2 parts, 5 parts of sulfur and 0.3 part of anti-scorch agent CTP are mixed in an internal mixer to obtain a rubber compound;
[0019] (b) The rubber compound is extruded through an extruder to make a tire tread;
[0020] (c) Put the tire tread under an ultraviolet lamp with a wavelength of 330nm and irradiate it for 10 minutes.
Embodiment 2
[0022] A preparation method for sound-absorbing and noise-reducing tire tread compound, comprising the following steps:
[0023] (a) 100 parts of polyisoprene rubber containing trans-azophenyl groups in the side chain, 55 parts of carbon black N234, 6 parts of zinc oxide, 4 parts of stearic acid, 2 parts of accelerator DZ, and 4020 parts of antioxidant 4 parts, 4 parts of sulfur and 0.1 part of anti-scorch agent CTP are mixed in an internal mixer to obtain a rubber compound;
[0024] (b) The rubber compound is extruded through an extruder to make a tire tread;
[0025] (c) Put the tire tread under an ultraviolet lamp with a wavelength of 330nm and irradiate it for 10 minutes.
Embodiment 3
[0027] A preparation method for sound-absorbing and noise-reducing tire tread compound, comprising the following steps:
[0028] (a) 100 parts of polyisoprene rubber containing trans-azophenyl groups in the side chain, 40 parts of carbon black N375, 5 parts of zinc oxide, 2 parts of stearic acid, 0.5 parts of accelerator CZ, and 0.5 parts of anti-aging agent RD 2 parts, 2 parts of anti-aging agent 4020, 2 parts of sulfur and 0.2 part of anti-scorch agent CTP are mixed in internal mixer to obtain rubber compound;
[0029] (b) The rubber compound is extruded through an extruder to make a tire tread;
[0030] (c) Put the tire tread under an ultraviolet lamp with a wavelength of 330nm and irradiate it for 10 minutes.
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Abstract
The invention belongs to the technical field of rubber tires, and particularly relates to a preparing method for reducing the porosity of tire tread rubber. The preparing method comprises the following steps that 1, polyisoprene rubber containing trans-azobenzene groups in side chains, carbon black, zinc oxide, stearic acid, an accelerant, an anti-aging agent, sulphur and a scorch retarder are mixed in an internal mixer to obtain a rubber compound; 2, the rubber compound is extruded through an extruder, and the tire tread is produced; 3, the tire tread is placed below an ultraviolet lamp and irradiated. By the adoption of the preparing method for reducing the rubber porosity of the tire tread, the rubber mixing technology does not need to be changed, and steps are easy to implement; cis-trans configuration transformation occurs by utilizing the trans-azobenzene groups on the side chains of polyisoprene rubber under irradiation of the ultraviolet lamp, so that molecular chains are movedand arrayed more compactly, and thus the porosity of the tire tread rubber is reduced; by reducing the porosity, mechanical properties such as tensile strength, elongation at break, tear strength andabrasion resistance of a rubber material are improved, and thus the service life of the tire tread rubber is effectively prolonged.
Description
technical field [0001] The invention belongs to the technical field of rubber tires, in particular to a preparation method for reducing the porosity of tire tread rubber. Background technique [0002] With the rapid development of the automobile industry, the performance requirements for tires are gradually increasing. Tires are often used under complex and harsh conditions, and they are subjected to various deformations, loads, forces, and high and low temperature effects during driving, so they must have high load-bearing performance, traction performance, and cushioning performance. Porosity is an important factor affecting tire performance. There are many types of tire tread specifications. During the extrusion process, there are often more air holes and a high return rate, which makes the tread unable to be used normally and affects the normal production. In addition, the existence of air holes will affect the wear resistance of the finished tire, and there will be ph...
Claims
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Application Information
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