Audited Supplier
Organic Silicone
Household, Medical, Industrial, Agricultural
ISO, FDA, REACH, RoHS
Anran
Packaging Bags and Cardboard Boxes
China Hebei
3926901000
Product Description
Unlock the potential of rubber with our bespoke customization process! This systematic approach is designed to skillfully tailor rubber materials to meet your unique product requirements. Dive into a world where material selection, performance optimization, and precise process adjustments converge, guided by the latest industry practices, to deliver exceptional quality and innovation.
1. Raw Material Preparation and Pretreatment1. Main Material Selection
Choose the ideal raw rubber based on its intended application: opt for natural rubber for its superior elasticity, nitrile rubber for outstanding oil resistance, or silicone rubber for high-temperature endurance.
2. Compound Agent Dispensing
Enhance performance by meticulously adding vulcanizers (sulfur or peroxide), promoters, anti-aging agents, and fillers like carbon black. Achieve precision in customization with a weighing accuracy of 0.1%.
3. Treatment of Reinforcement Materials
To fortify binding strength, precondition the skeletal materials, such as steel wire or fiber, by soaking them in rubber and drying at 60-70ºC.
2. Plastic Refining Process
Refine the plasticity by mechanically extruding the material through an opening machine or employing thermal oxidative degradation using a compacting machine to reduce molecular weight.
1. Mechanical Plastic Smelting: Maintain a steady temperature of 60ºC, ensuring viscosity remains below 60 for optimal results.
2. Thermoplastic Refining: Ideal for natural rubber pretreatment, introducing compressed air refines elasticity and resilience.
3. Mixed Refining Process
Achieve uniform dispersion and consistency by meticulously mixing in a rubber refining machine, crafting a uniformly mixed rubber with balanced properties.
Master the art of refinement with key control points: keep temperature at ≤120°C, process time between 5-15 minutes, and roll distance from 1-3mm.
Customized adjustments
1. For high wear-resistant products: Elevate wear resistance by increasing carbon black content to 40-50 parts.
2. For high temperature resistant products: Enhance durability with zinc oxide (5-8 parts) and a silane coupling agent for optimal performance.
4.moulding process
| Placement forming | Suitable for rubber plate and sealing strip, need to control the adhesive thickness tolerance ± 0.1mm |
| Squeeze and shape | For the hose and sealing ring, the mouth die design directly affects the accuracy of the section |
| Modular pressure molding | Metal-rubber composite mold should be used for the complex structure |
| injection mo(u)lding | Complex structural parts are multi-material composite components |
5. Full Test of Finished Products
(1) Appearance Inspection: Ensure impeccable quality by examining surfaces for bubbles, cracks, tolerances (± 0.1mm), and color consistency using precise tools like vernier calipers and micrometers.
(2) Physical Performance Test
1. Tensile Strength: Test fracture resistance and elongation per GB/T 528-2009 for robust and reliable products.
2. Hardness Test: Measure with precision via a Shore hardness meter (Type A/D), adhering to ISO 7619-1:2010 for optimal results.
3. Abrasion Resistance: Evaluate durability with a clone wear test machine, ensuring long-lasting wear resistance.
(3) Chemical performance test
| Oil resistance | Soak in mineral oil or solvent for 72 hours to measure volume rate of change (e. g. 30% in NBR tube) |
| resistance to chemical attack | The immersion test was used to evaluate the tolerance of acid and alkali (e. g. fluorine rubber and concentrated sulfuric acid) aging performance test |
| heat deterioration | Placed in 150ºC oven for 72 hours to test hardness change (e. g. silicone rubber 15%) |
| ultraviolet radiation aging | Use the xenon lamp aging tester to simulate 500 hours of light |
- Environmental protection and safety testing
| RoHS check | Screening for lead, mercury, cadmium and other harmful substances, the limit of 1000ppm (such as rubber for electronic accessories) |
| Food contact safety | Total migration (10 mg/dm²) and specific migration (e. g. heavy metals) were tested according to GB 4806.11-2023 standard |
| biocompatibility | The total number of colonies (100 CFU / g) and sensitization were tested by the ISO 10993 standard |
6. Quality control
1. Data record and traceability: Maintain impeccable inspection records, detailing test dates, items, outcomes, and corrective actions for nonconforming products, enhancing product reliability.
2. Treatment of nonconforming products: Swiftly isolate and analyze defects, addressing issues like formula deviations and process lapses with effective corrective actions.
7.Test standards and equipment
| surveillance project | Core standards | Typical equipment |
| tensile property | GB/T 528-2009,ISO37-2005 | tensile machine |
| hardness | GB/T 531.1-2008,ASTM D2240 | Shore durometer |
| Ozone-resistant aging | GB/T 7762-2022 | ozone box |
| Food contact safety | GB 4806.11-2023 | Analog migration Tester |
| RoHS check | IEC 62321-7-2017 | X ray fluorescence spectrometer |
(1) 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 |
(2)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 |
| 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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