Oil rubber is a part of the tire carcass. It is located on the inner surface of the load tire to protect the inner tube from wear. Compared with the tire tread, sidewall and ply rubber, the performance requirement of the oil rubber is lower. The tensile strength and aging resistance of rubber have certain requirements, so it is possible to use a large amount of reclaimed rubber to reduce the production cost of the entire truck tire. Xiaobian today shares with you a high proportion of heavy-duty carcass oil-adhesive rubber blended with recycled rubber.
70 parts of natural rubber; 30 parts of styrene-butadiene rubber; 100 parts of reclaimed rubber; 5 parts of zinc oxide; 2 parts of stearic acid; 2.6 parts of anti-aging agent; 30 parts of semi-reinforcing carbon black; 30 parts of light calcium; Parts; pine tar 10 parts; accelerator CZ 1 part; accelerator TMTD 0.1 parts; sulfur 2.3 parts; total: 303 parts.
Natural rubber and styrene-butadiene rubber are the main raw materials for the production of automobile tires. The use of recycled rubber can reduce the amount of natural rubber and styrene-butadiene rubber, thereby reducing the cost of raw materials. In the actual production process, although the oil-powder is mechanically strong. The requirements are not particularly high, but in order to ensure the safety of the tires, rubber manufacturers are better to choose high-strength tire tread reclaimed rubber to ensure the performance and service life of the oil rubber.
In the production process, the rubber tire rubber requires the vulcanization starting point to be earlier in the production process, avoiding the problem of migration to the ply during the vulcanization process and affecting the performance of the curtain rubber; therefore, insoluble sulfur can be used for vulcanization with sulfur as a vulcanizing agent. The highly active after-effect accelerator CZ is the main accelerator. It is combined with a small amount of accelerator TMTD to shorten the curing time, ensure the uniformity of the oil skin glue and improve the aging resistance of the oil skin glue.
Filling an appropriate amount of light calcium carbonate in the oil-filled rubber filling system containing reclaimed rubber can further reduce the production cost, and the use of semi-reinforcing carbon black can improve the elongation of the oil rubber, reduce the heat generation, and improve the carcass of the load tire. The elasticity and aging resistance of the oil rubber; the silica-alumina carbon black in the above formula is not common. It is a kind of inorganic substance prepared by the process of pulverizing and then calcining under the action of mechanical force. The new rubber filler of organic matter has high organic matter content, which can improve the processing plasticity of the oil skin glue and improve the mechanical strength of the rubber material.
The aging resistance is the main influencing factor affecting the service life of the rubber tire rubber of the truck tire. The aging resistance of the reclaimed rubber itself is better than that of the natural rubber and styrene-butadiene rubber. Adding an appropriate amount of anti-aging agent can further improve the aging resistance of the oil-powder rubber. Amine anti-aging agent A has good protection against heat, oxygen, flexing, weathering and fatigue, but it has certain pollution. It must be controlled. It can be used to improve the oil and rubber. Resistance to aging caused by oxygen.
In the production process of truck tires, oil rubber, tire tread rubber, sidewall rubber, curtain rubber, ring rubber, etc. can be mixed with a certain proportion of reclaimed rubber. Tire inner tube and tubeless tire inner liner can also be used for regeneration. Glue, but the type of reclaimed rubber is very different from the amount of regrind. We will discuss it later.