| Customization: | Available |
|---|---|
| Material: | Organic Silicone |
| Application: | Household, Medical, Industrial, Agricultural |
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1. Raw Material Preparation and Pretreatment
1. Main Material Selection
Selecting the perfect raw rubber is crucial to aligning with your product's specific function. Whether you're looking for natural rubber's superb elasticity, nitrile rubber's excellent oil resistance, or silicone rubber's outstanding resilience to high temperatures, our selection process guarantees the best fit.
2. Compound Agent Dispensing
Precisely enhance the rubber's performance with the meticulous addition of vulcanizers like sulfur or peroxide, along with promoters, anti-aging agents, and fillers such as carbon black or white carbon black. This process is executed with exceptional accuracy, achieving an error margin as low as 0.1%.
3. Treatment of Reinforcement Materials
For superior binding strength, the reinforcement materials, such as steel wire or fiber, are carefully pretreated. This includes immersion in rubber followed by controlled drying at 60-70°C, ensuring seamless integration with the rubber.
2. Plastic Refining Process
Increase plasticity by reducing molecular weight using cutting-edge mechanical extrusion or thermal oxidative degradation techniques. We employ state-of-the-art equipment, including opening and compacting machines, to perfect this process.
1. Mechanical Plastic Smelting: Maintain a precise processing temperature at 60°C to effectively lower viscosity below 60, ensuring flawless processing.
2. Thermoplastic Refining: Ideal for natural rubber pretreatment, this technique involves introducing compressed air to achieve superior outcomes.
3. Mixed Refining Process
Achieve exceptional consistency in properties by uniformly dispersing the compound in a high-performance rubber refining machine, creating a mixed rubber of outstanding quality.
Key control points: Ensure that temperature is strictly maintained at ≤120°C, with a precise duration of 5-15 minutes, and a carefully controlled roll distance of 1-3mm.
Customized adjustments:
1. To enhance wear resistance, increase carbon black content to 40-50 parts by weight, resulting in superior durability.
2. To improve high-temperature resistance, incorporate zinc oxide (5-8 parts by weight) and a silane coupling agent for optimal 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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