| 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 align with the intended function of your product. Whether it's the exceptional flexibility of natural rubber, the oil resistance of nitrile rubber, or the outstanding high-temperature resilience of silicone rubber, we provide the finest selection available.
2. Compound Agent Dispensing
Amplify the rubber's performance by accurately incorporating vulcanizers such as sulfur or peroxide, accelerators, anti-aging agents, and fillers like carbon black or white carbon black. Achieve unparalleled precision with an error margin as low as 0.1%.
3. Treatment of Reinforcement Materials
To ensure optimal bonding strength, the reinforcement material, whether it's steel wire or fiber, is carefully pretreated. This involves immersion in rubber followed by drying at a calculated 60-70°C for seamless integration with the rubber.
2. Plastic Refining Process
Enhance the plasticity by reducing molecular weight through innovative mechanical extrusion or thermal oxidative degradation processes. Cutting-edge machinery, such as opening and compacting machines, is employed for this procedure.
1. Mechanical Plastic Smelting: Maintain an exact temperature of 60°C to effectively decrease viscosity below 60, ensuring flawless processing.
2. Thermoplastic Refining: Ideal for natural rubber pretreatment, this technique introduces compressed air to reach optimal outcomes.
3. Mixed Refining Process
Attain impeccably consistent features by uniformly dispersing the mixture within a high-performance rubber refining machine, producing a mixed rubber of exceptional quality.
Key control points: Maintain an exact temperature of ≤120°C, with a processing time spanning 5-15 minutes, and a roll gap precisely set at 1-3mm.
Customized adjustments:
1. For products necessitating exceptional wear resistance, increase carbon black content to 40-50 parts by weight to enhance longevity.
2. For products required to endure 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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