| Customization: | Available |
|---|---|
| Material: | Bakelite |
| Application: | Medical, Household, Electronics, Automotive, Agricultural |
|
Still deciding? Get samples of $ !
Request Sample
|
Suppliers with verified business licenses
1. Raw Material Preparation and Pretreatment
1. Main Material Selection
Choose the ideal type of raw rubber based on the specific application of your product. Natural rubber offers exceptional elasticity, nitrile rubber excels in oil resistance, while silicone rubber withstands high temperatures effortlessly.
2. Compound Agent Dispensing
Employ a precise blend of vulcanizers (sulfur or peroxide), promoters, anti-aging agents, and fillers (carbon black or white carbon black) to tailor the performance. Achieve perfection with accurate weighing that boasts an error margin of just 0.1%.
3. Treatment of Reinforcement Materials
Enhance the durability by pretreating the skeletal materials like steel wire or fiber. Soak them in rubber, followed by drying at 60-70°C, to ensure a robust bond with the rubber.
2. Plastic Refining Process
Refine the plasticity of raw glue by reducing its molecular weight through mechanical extrusion using an opening machine or thermal oxidative degradation with a compacting machine.
1. Mechanical Plastic Smelting: Keep the temperature steady at 60°C and ensure viscosity remains below 60 for optimal results.
2. Thermoplastic Refining: Ideal for pretreating natural rubber, this process introduces compressed air to achieve desired results.
3. Mixed Refining Process
Achieve superior quality with uniform dispersion of the mixture in the rubber refining machine, resulting in a mixed rubber that exhibits consistent properties throughout.
Key control points: Maintain a temperature of ≤120°C, a processing time of 5-15 minutes, and a roll distance of 1-3mm to ensure perfection.
Customized adjustments:
1. For products demanding high wear resistance: Elevate carbon black content to 40-50 parts by weight.
2. For high temperature endurance: Integrate zinc oxide (5-8 parts by weight) alongside 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 |
Rubber materials and characteristics
| native rubber(NR) | High elasticity (tensile strength 20-25MPa), wear resistance, tear resistance, but poor oil resistance and ozone resistance |
| styrene-butadiene rubber(SBR) | Excellent wear resistance (low cost), but the elasticity, tear resistance is weaker than natural rubber |
| butadiene rubber(BR) | Outstanding cold resistance (-70ºC is still elastic), wear resistance, but low strength, poor tear resistance |
| Ding eyes rubber(NBR) | Excellent oil resistance (mineral oil, lubricating oil), low compression permanent deformation, but poor low temperature resistance |
| ethylene-propylene rubber(EPDM) | Optimal weather resistance, ozone resistance, high temperature resistance (150ºC), good electrical insulation, but poor oil resistance |
| chloroprene rubber(CR) | Good aging resistance, ozone resistance and flame retardant, but poor low temperature performance (brittle below-30ºC) |
| silastic(VMQ) | Temperature resistance range (-70~300ºC), excellent biocompatibility, but low mechanical strength |
| fluorine(-containing)rubber(FKM) | High temperature resistance (250ºC), strong acid and alkali resistance, oil resistance, but poor air permeability, high processing difficulty |
| hydrogenated butadiene-acrylonitrile rubber (HNBR) | Oil resistance, high temperature resistance is better than ordinary NBR, wear resistance is strong |
| chlorosulfonated polyethylene(CSM) | Resistance to strong acid and strong alkali (such as concentrated sulfuric acid), ozone resistance, but poor oil resistance |
| urethane rubber(PU) | Excellent wear resistance (high Shaw hardness), tear resistance, but poor oil resistance, weak weather resistance |
| acrylic rubber(ACM) | High temperature resistance (200ºC), oil resistance (such as ester lubricating oil), but poor cold resistance |
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) |
){kind=link}