As a professional silicone product manufacturer with years of experience in foreign trade, we adhere to strict quality control standards throughout the entire production process. Our one-stop production line covers raw material selection, compounding, molding, curing, post-processing, quality inspection and packaging, ensuring that every silicone product meets international standards (FDA, LFGB, RoHS) and your customization needs. Below is the detailed production process of our silicone products.

The foundation of high-quality silicone products lies in premium raw materials. We select high-purity silica (SiO₂) from quartz sand as the core raw material, which is processed through purification to remove impurities such as metal oxides, ensuring the purity of the raw material reaches over 99%. Then we choose food-grade, medical-grade or industrial-grade silicone base materials according to your product application scenarios, and all raw materials are certified by international authorities to ensure non-toxicity, high temperature resistance and chemical stability.

First, the purified silica is heated to about 2000°C in an electric arc furnace with carbon sources (coal or wood chips) to produce metallurgical-grade silicon (MG-Si) with a purity of 98-99%. Then, the metallurgical-grade silicon reacts with methyl chloride at 250-350°C under the action of a copper-based catalyst to generate methyl chlorosilane mixture, which is separated by distillation to obtain dimethyldichlorosilane, the key raw material for silicone rubber production. After that, the chlorosilane undergoes hydrolysis and polycondensation reactions to form polysiloxane, the basic material of silicone rubber. Finally, we mix the base silicone polymer with functional additives (reinforcing fillers, colorants, curing agents, flame retardants, UV stabilizers, etc.) in precise proportions to meet the specific performance requirements of different products, such as hardness, elasticity, color and heat resistance. The mixing process is completed in professional equipment (Banbury mixer or two-roll mill) with strict control of temperature and time to ensure uniform dispersion of all components.

We adopt different molding processes according to your product shape, size, precision requirements and production volume, ensuring high efficiency and high precision of production:

• Compression Molding (SSI): Suitable for small and medium batches, thick-walled and simple-structured products (such as seals, buttons). The pre-cut and weighed silicone compound is put into a preheated mold (150-200°C), pressed by a hydraulic press (50-150MPa) and vulcanized for 10-60 seconds, then demolded and trimmed.
• Liquid Silicone Rubber (LSR) Injection Molding: Suitable for high-precision, thin-walled and complex-structured products (such as baby pacifiers, wearable device seals). The two-component LSR (A/B ratio 1:1) is vacuum degassed first, then injected into a preheated mold (80-150°C) by a screw/plunger, and cured by platinum catalysis for 10-30 seconds, then automatically ejected.
• Extrusion Molding: Suitable for long strip and uniform cross-section products (such as silicone tubes, sealing strips). The silicone compound is melted in a heating barrel (80-120°C), extruded into shape through a die, then vulcanized in a tunnel vulcanizing furnace (200-300°C) and cooled and cut to length.
• Other Molding Processes: For small-batch customized products, we use RTV room temperature vulcanization molding; for rapid prototyping, we adopt 3D printing molding; for sheet products, we use calendering molding.

Curing is a key step to make silicone products have durability and elasticity. According to the type of silicone and product requirements, we adopt different curing methods: high-temperature vulcanization (HTV) for solid silicone, platinum-catalyzed addition curing for LSR, and room-temperature vulcanization (RTV) for special adhesives or sealants. During the curing process, the long-chain silicone polymer forms a three-dimensional network structure through chemical bonding, and the product is shaped while curing. After curing, the product has excellent flexibility, heat resistance and chemical inertness, which can meet the needs of different application scenarios.

After demolding, the silicone products need to go through a series of post-processing steps to optimize their appearance and functionality:

• Trimming & Deburring: Remove excess material (flash) on the product surface by manual trimming, punch trimming or frozen deburring (liquid nitrogen freezing makes the burr brittle, then removed by sandblasting) to ensure smooth edges and precise dimensions.
• Surface Treatment: According to the application needs, perform polishing, matte treatment, spray feel oil, or coating (such as parylene coating) to improve the product's touch, anti-slip performance and weather resistance.
• Custom Marking: Add logos, instructions or decorative elements to the product by screen printing, laser engraving, pad printing or heat transfer to meet your brand customization needs.
• Secondary Processing: For composite products, perform overmolding (combining silicone with plastic, metal and other materials) or insert molding (placing metal/plastic inserts in advance and combining with silicone during molding) to realize multi-functional integration of products.
• Sterilization Treatment: For baby products and medical devices, perform high-pressure steam sterilization or ozone sterilization to meet hygiene standards.

Quality is the core of our foreign trade cooperation. We have a professional quality inspection team and complete testing equipment to conduct strict inspections on every batch of products:

• Visual Inspection: Check the product surface for defects, color uniformity and dimensional accuracy to ensure that there are no bubbles, scratches or color differences.
• Performance Testing: Test the product's hardness, tensile strength, elongation at break, heat resistance, chemical resistance and other mechanical properties to ensure they meet the agreed standards.
• Compliance Testing: For food-grade, medical-grade products, conduct FDA, LFGB, RoHS and other certification tests to ensure non-toxicity, safety and compliance with international market access requirements.
• Batch Record: Record the test results of each batch in detail, and only products that pass all inspections can enter the packaging link; unqualified products will be scrapped or reprocessed to ensure zero defective products leave the factory.

We customize packaging solutions according to your export needs and product characteristics to ensure that the products are not damaged during transportation and meet the standards of international logistics and retail terminals. The packaging options include independent packaging, environmental protection packaging, custom printed boxes, blister packaging, etc. We also attach barcodes, FNSKU or brand labels as required to meet the requirements of e-commerce platforms and retailers. All products are sealed with moisture-proof materials and packed in strong corrugated cartons with sufficient buffer materials to ensure safe delivery to your designated location around the world.