| 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 quintessential type of raw rubber to align perfectly with your product's intended function. From the superior elasticity of natural rubber to the oil resistance offered by nitrile rubber and the outstanding high-temperature resilience of silicone rubber, we provide you with an unparalleled selection to meet any need.
2. Compound Agent Dispensing
Elevate rubber performance by precisely incorporating vulcanizers such as sulfur or peroxide, along with accelerators, anti-aging compounds, and fillers like carbon black or white carbon black. Attain exceptional precision with an impressively minimal error margin of just 0.1%.
3. Treatment of Reinforcement Materials
To achieve peak bonding strength, skeletal materials, be it steel wire or fiber, undergo meticulous pretreatment. This involves submersion in rubber followed by controlled drying at an exacting 60-70°C, ensuring superior integration with the rubber matrix.
2. Plastic Refining Process
Augment plasticity by diminishing molecular weight via state-of-the-art mechanical extrusion or thermal oxidative degradation techniques. Cutting-edge machinery, including opening and compacting machines, is leveraged for this advanced process.
1. Mechanical Plastic Smelting: Sustain a precise temperature of 60°C to effectively diminish viscosity to below 60, facilitating seamless processing.
2. Thermoplastic Refining: Ideally suited for natural rubber pretreatment, this approach introduces compressed air for optimal results.
3. Mixed Refining Process
Achieve unparalleled consistency in properties by uniformly distributing the mixture within a high-performance rubber refining machine, thereby fabricating a mixed rubber of extraordinary quality.
Key control points: Maintain a precise temperature of ≤120°C, with a processing window of 5-15 minutes, and a roll distance meticulously adjusted to 1-3mm.
Customized adjustments:
1. For products requiring exceptional wear resistance, increase the carbon black content to 40-50 parts by weight to substantially enhance durability.
2. For products that must endure high temperatures, integrate zinc oxide (5-8 parts by weight) alongside a silane coupling agent for optimal performance.
3. For the molding 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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