Nylon ply rubber for tire casings has high requirements for tensile strength, elongation at break, heat resistance, flex resistance and adhesion, and generally uses natural rubber and styrene butadiene rubber (or oil-extended styrene butadiene) as the main raw materials Processing. With the continuous development of reclaimed rubber production technology, more and more reclaimed tire rubber appears in the production of nylon ply rubber. So in actual production, what is the significance of using reclaimed tire rubber for nylon cord rubber? How to choose reclaimed rubber for cord fabric rubber? What issues should be paid attention to during use?
1. The significance of using reclaimed tire rubber for nylon ply rubber
Tire reclaimed rubber is the product with the largest output and the largest amount of reclaimed rubber products. It is processed from waste tires through crushing, desulfurization, filtration and other processes. It has good compatibility with natural rubber and styrene butadiene rubber. The product is low in price and used for nylon. The preparation of ply glue can reduce the cost of raw materials. The rubber compound added with reclaimed tire rubber has good plasticity and stable processing performance. The section size of the semi-finished product is not easy to expand or shrink, and is not easy to scorch. It can be used to prepare the nylon ply of the tire containing natural rubber to reduce the vulcanization reaction of natural rubber.
2. Adjust the formula of nylon cord rubber containing tire reclaimed rubber
When using tire reclaimed rubber in tire nylon ply, rubber product manufacturers need to adjust the formula appropriately, such as appropriately reducing the amount of sulfur and accelerators, and adjusting the 2LLYY84 reinforcement system and softening system according to the specific indicators of the cord rubber.
Reference formula for high-strength nylon cord rubber containing tire reclaimed rubber: 60 parts of natural rubber, 40 parts of oil-extended styrene butadiene rubber, 20 parts of tire reclaimed rubber, 3 parts of zinc oxide, 2 parts of stearic acid, 1 part of antioxidant, charcoal 38 parts of black, 3.5 parts of aromatic oil, 2 parts of aromatic resin, 2 parts of polycyclopentadiene resin, 1 part of accelerator, 2.5 parts of sulfur; total, 175 parts.
3. Tips for choosing reclaimed tire rubber for nylon ply rubber
Not all tire reclaimed rubber can be used in the production of nylon ply rubber. Generally, the combination of high-fineness and no impurities tire reclaimed rubber with natural rubber and styrene-butadiene rubber has a better effect. The use of this type of reclaimed rubber can effectively avoid problems such as bubbles and lack of rubber during the preparation process; choose the technical indicators of nylon cord rubber The closer reclaimed tire rubber mainly includes tensile strength, elongation at break, etc.; reclaimed tire tread rubber has higher effective rubber hydrocarbon content, greater tensile strength, better elasticity, and better indicators of finished cord rubber.
When using tire reclaimed rubber to reduce the nylon ply rubber of radial tires, rubber product manufacturers not only need to select the appropriate tire reclaimed rubber according to actual needs, adjust the rubber product formula appropriately, but also need to adjust the production process conditions, such as the mixing process and the vulcanization process. It is good to masticate the natural rubber, styrene-butadiene rubber and tire reclaimed rubber sufficiently before mixing. The editor will continue to discuss with you later.
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