| 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 tailored to your product's purpose. Whether it's the unmatched elasticity of natural rubber, the oil resistance of nitrile rubber, or the superior high-temperature resilience of silicone rubber, we offer unparalleled choices.
2. Compound Agent Dispensing
Elevate rubber performance with precision. Inject vulcanizers like sulfur or peroxide, alongside promoters, anti-aging agents, and fillers such as carbon black or white carbon black, achieving unmatched accuracy with a minimal error margin of just 0.1%.
3. Treatment of Reinforcement Materials
For optimal bonding strength, the skeletal material, whether steel wire or fiber, undergoes meticulous pretreatment. This includes immersion in rubber and precise drying at 60-70°C, ensuring superior integration with the rubber.
2. Plastic Refining Process
Enhance plasticity by reducing molecular weight through advanced mechanical extrusion or thermal oxidative degradation techniques. Cutting-edge machinery, including opening and compacting machines, is employed for this process.
1. Mechanical Plastic Smelting: Maintain a precise temperature of 60°C to effectively lower viscosity to under 60, ensuring seamless processing.
2. Thermoplastic Refining: Perfect for natural rubber pretreatment, this method utilizes compressed air to achieve outstanding results.
3. Mixed Refining Process
Achieve impeccable consistency by uniformly dispersing the mixture in a high-performance rubber refining machine, crafting a mixed rubber of extraordinary quality.
Key control points: Precisely maintain temperature at ≤120°C, with a timeframe of 5-15 minutes, and set roll distance meticulously at 1-3mm.
Customized adjustments:
1. For products requiring extraordinary wear resistance, enhance durability by increasing carbon black content to 40-50 parts by weight.
2. For products enduring high temperatures, incorporate zinc oxide (5-8 parts by weight) and a silane coupling agent for outstanding 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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