| Customization: | Available |
|---|---|
| Material: | Organic Silicone |
| Application: | Household, Medical, Industrial, Agricultural |
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1. Raw Material Preparation and Pretreatment
1. Main Material Selection
Select the perfect raw rubber type to align seamlessly with your product's function. Whether you require the outstanding elasticity of natural rubber, the oil resistance of nitrile rubber, or the extraordinary high-temperature resilience of silicone rubber, our curated selection assures the best match for your needs.
2. Compound Agent Dispensing
Refine the rubber's capabilities by accurately adding vulcanizers like sulfur or peroxide, along with promoters, anti-aging agents, and fillers such as carbon black or white carbon black. Our precision ensures an error margin as minimal as 0.1% for impeccable performance.
3. Treatment of Reinforcement Materials
Achieve optimal binding strength by meticulously pretreating the skeletal material, be it steel wire or fiber. This procedure involves immersing it in rubber and drying it at an exact 60-70°C to ensure seamless integration with the rubber matrix.
2. Plastic Refining Process
Enhance rubber plasticity by strategically reducing molecular weight using advanced mechanical extrusion or thermal oxidative degradation techniques. Cutting-edge equipment like opening and compacting machines ensure precision in this process.
1. Mechanical Plastic Smelting: Carefully maintain a temperature of 60°C to efficiently lower viscosity to below 60, facilitating seamless processing.
2. Thermoplastic Refining: Ideal for natural rubber pretreatment, this process injects compressed air to achieve superior results.
3. Mixed Refining Process
Achieve flawlessly consistent properties by thoroughly dispersing the mixture in a high-performance rubber refining machine, producing a mixed rubber of outstanding quality.
Key control points: Precisely maintain a temperature of ≤120°C, with a duration of 5-15 minutes, and a roll distance meticulously calibrated to 1-3mm.
Customized adjustments:
1. For products demanding exceptional wear resistance, enhance durability by increasing carbon black content to 40-50 parts by weight.
2. For products that must endure high temperatures, integrate zinc oxide (5-8 parts by weight) with a silane coupling agent for superior performance.
3. For the moulding process:
| Placement forming | Suitable for rubber plates and sealing strips, it is necessary to control the adhesive thickness tolerance within ± 0.1mm. |
| Extrusion and shaping | For the hose and sealing ring, the design of the mouth die directly affects the accuracy of the section. |
| Modular pressure molding | Metal-rubber composite molds should be used for complex structures. |
| Injection molding | Complex structural parts are multi-material composite components |
Comparison of key performance parameters
| index | NR | NBR | FKM | SIR | EPDM |
| Temperature resistance range | -60~100ºC | -25~130ºC | -20~250ºC | -70~300ºC | -60~150ºC |
| oil resistivity | insufficient | excellent(NBR40) | extremely excellent | insufficient | insufficient |
| ozone resistance | insufficient | insufficient | excellent | excellent | excellent |
| abrasion performance | excellent | middle | middle | insufficient | excellent |
| Electric insulation | excellent | insufficient | insufficient | excellent | excellent |
Suggestions for type selection
| Oil resistance scene | Nitrile rubber (NBR) or fluorine rubber (FKM) is preferred |
| hot environment | Silicone rubber (VMQ) or fluorine rubber (FKM) |
| resistance to chemical attack | Chlorosulfated polyethylene (CSM) or fluorine rubber (FKM) |
| dynamic packing | Ethpropylene rubber (EPDM) or polyurethane rubber (PU) |
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