The biggest feature of nitrile rubber is its excellent oil resistance. It is an ideal raw material for the production of oil resistant rubber sheets. However, the nitrile rubber itself has poor roll properties, poor self-adhesiveness and poor ozone resistance, which seriously affects the processing performance and service life of the oil resistant rubber sheet! Then, in actual production, can the ozone resistance of oil-resistant rubber sheets with nitrile rubber as the main raw material be improved? How to improve the process performance? Rubber products manufacturers may wish to consider 1JLYY95 from the following three aspects.
1. Use PVC in the nitrile oil resistant rubber sheet formulation
Polyvinyl chloride, which is often referred to as PVC material, has stable physical and chemical properties and has a certain resistance to general chemical corrosion. After chemical cross-linking, the material's UV resistance, solvent resistance and impact resistance are significantly improved. Tests have shown that the nitrile rubber/PVC blend material test piece is placed in ozone at a concentration of 1%, and cracks still occur after 20 minutes; in contrast, the pure nitrile rubber test piece is at the same ozone concentration. Ozone cracking occurs in just 3 minutes.
Therefore, in the amount of PVC material in the nitrile rubber, the choice of rubber and plastic blending can significantly improve the ozone resistance of the nitrile oil resistant rubber sheet. In fact, the process performance of nitrile rubber blended with low molecular weight PVC will also be significantly improved.
2. Use reclaimed rubber in the nitrile oil resistant rubber sheet formulation
The surface of the rubber-coated stripping and oil-resistant rubber sheet is rough. I believe this is a headache and frequent problem for manufacturers of nitrile-resistant rubber sheets. The recycled rubber products of waste rubber products are processed and reprocessed with good fluidity, high plasticity and stable product size. The high-grade reclaimed rubber products can also improve the smoothness of the surface of the products to a certain extent. Therefore, rubber products manufacturers may wish to use oil-resistant rubber sheets. The proper amount of reclaimed rubber (butyronitrile reclaimed rubber or tire tread reclaimed rubber) can be used in the formulation to improve the performance of the oil-resistant rubber sheet and reduce the production cost of the nitrile-resistant rubber sheet.
3. Reasonable selection of the matching system of nitrile oil resistant rubber sheet
The nitrile oil resistant rubber sheet is prone to scorch problem during the production process. Although adding a proper amount of reclaimed rubber can alleviate the scorch problem to a certain extent, it still cannot be fundamentally solved. Rubber manufacturers need to choose a suitable vulcanization system. For example, the combination of accelerator CZ and accelerator TMTD can significantly improve the scorch safety and vulcanization flatness of the rubber compound. Rubber products manufacturers also need to rationally design the reinforcing filling system of oil-resistant rubber sheet, softening plasticizing system, anti-aging system, etc., while improving the technical performance of the rubber compound, further improve the comprehensive index of oil-resistant rubber sheet and prolong the service life.
When using nitrile rubber to produce oil-resistant rubber sheet, rubber products manufacturers can add appropriate amount of polyvinyl chloride or reclaimed rubber to the formula, which can improve the process performance of the rubber compound, improve the comprehensive index of oil-resistant rubber sheet and reduce the production cost. Continue to share the formula for the nitrile oil resistant rubber sheet containing reclaimed rubber.
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