| 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 type of raw rubber to complement your product's purpose. Whether you desire the outstanding elasticity of natural rubber, the superior oil resistance of nitrile rubber, or the exceptional high-temperature resilience of silicone rubber, we offer the finest selection tailored to your needs.
2. Compound Agent Dispensing
Elevate the performance of rubber by expertly adding vulcanizers like sulfur or peroxide, along with promoters, anti-aging agents, and fillers such as carbon black or white carbon black. Achieve unparalleled precision with an error margin of merely 0.1%.
3. Treatment of Reinforcement Materials
For optimal bonding strength, the reinforcement materials, such as steel wire or fiber, undergo meticulous pretreatment. This involves soaking in rubber followed by drying at an exact 60-70°C for flawless integration with the rubber.
2. Plastic Refining Process
Enhance plasticity by reducing molecular weight using cutting-edge mechanical extrusion or thermal oxidative degradation techniques. Utilize state-of-the-art equipment, including opening and compacting machines, for this advanced process.
1. Mechanical Plastic Smelting: Maintain a precise temperature of 60°C to effectively lower viscosity below 60, ensuring smooth and efficient processing.
2. Thermoplastic Refining: Ideally suited for pretreating natural rubber, this method incorporates compressed air for optimal results.
3. Mixed Refining Process
Achieve impeccably consistent properties by uniformly dispersing the mixture in a high-performance rubber refining machine, creating a mixed rubber of superior quality.
Key control points: Maintain a precise temperature of ≤120°C, with a processing time of 5-15 minutes, and a roll distance precisely set at 1-3mm.
Customized adjustments:
1. For products demanding exceptional wear resistance, increase carbon black content to 40-50 parts by weight to enhance durability significantly.
2. For products required to withstand high temperatures, incorporate zinc oxide (5-8 parts by weight) along with 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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