| Customization: | Available |
|---|---|
| Material: | Organic Silicone |
| Application: | Household, Medical, Industrial, Agricultural |
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1. Raw Material Preparation and Pretreatment
1. Main Material Selection
Choose the ideal type of raw rubber to match your product's purpose. Whether it's the exceptional elasticity of natural rubber, the oil resistance of nitrile rubber, or the remarkable high temperature resilience of silicone rubber, we've got you covered with the best selection.
2. Compound Agent Dispensing
Enhance the rubber's performance by precisely adding vulcanizers like sulfur or peroxide, promoters, anti-aging agents, and fillers such as carbon black or white carbon black. Achieve unmatched accuracy with a minimal error margin of just 0.1%.
3. Treatment of Reinforcement Materials
For optimal binding strength, the skeletal material, whether steel wire or fiber, is meticulously pretreated. This includes soaking in rubber followed by drying at a precise 60-70°C for superior integration with the rubber.
2. Plastic Refining Process
Enhance plasticity by reducing molecular weight through cutting-edge mechanical extrusion or thermal oxidative degradation techniques. State-of-the-art equipment such as opening and compacting machines are utilized for this process.
1. Mechanical Plastic Smelting: Maintain a precise temperature of 60°C to effectively lower viscosity to under 60, ensuring smooth processing.
2. Thermoplastic Refining: Perfect for natural rubber pretreatment, this method introduces compressed air to achieve optimal results.
3. Mixed Refining Process
Achieve impeccably consistent properties by uniformly dispersing the mixture in a high-performance rubber refining machine, crafting a mixed rubber of exceptional quality.
Key control points: Maintain a precise temperature of ≤120°C, with a time frame of 5-15 minutes, and a roll distance meticulously set at 1-3mm.
Customized adjustments:
1. For products requiring exceptional wear resistance, increase carbon black content to 40-50 parts by weight to enhance durability.
2. For products that must withstand high temperatures, incorporate zinc oxide (5-8 parts by weight) along 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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