Introduction to the six processes of silicone products

1. The moulding

Molding, the most common process.The mould shape determines the shape of the silicone product.Molded silica gel products are usually formed by applying pressure at high temperature through vulcanizing machine after placing solid silica gel raw materials with vulcanizing agent. The hardness of molded silica gel is usually 30°C-70°C. This kind of production process is relatively simple and suitable for all silicone products.

2. Injection (injection)

This process is a combination of liquid silica gel and plastic with high quality requirements.Its product performance is better thermal stability, cold resistance, excellent electrical insulation performance, combustion will not produce toxic substances, etc.Therefore, it has become an irreplaceable material in the production and design of health products, cars, baby products, medical products, diving products, kitchen appliances and seals.

3. Squeeze out

Extrusion molding, extruded silica gel products are usually formed by extruding machine extruding silica gel, generally the shape of extruded silica gel is long, tubular can be cut at will, extrusion technology to make the product shape is relatively simple, mostly for the strip.Silica gel tube is widely used in medical treatment and mechanical equipment.It can also be used for caching in packaging materials.

4. The calender

The silicone rubber is kneaded with silica and silicone oil to form a compound and then rolled out into a sheet.The longitudinal and transverse physical and mechanical properties of the film produced by calendering are obviously different. This phenomenon is calendering effect.Specifically, the tensile strength of the film is greater than that of the film, the elongation of the film is greater than that of the film, and the shrinkage of the film is greater than that of the film.

The calendering effect is the result of macromolecule and aciculate and flake coordination agent in the calendering process.The size of the calendering effect is related to the composition, calendering temperature, speed and speed ratio of the binder.For larger products, such as silicone sheet, silicone plate.

5. Perfusion

Method of irrigation mode or perfusion mode of operation: filling mould or filling mould, is used to compare smooth or simple products, no save work line to save time, is you want to copy product or model, with plastic board or glass plate that will be a vacuum of silica gel directly into the products above, after being dry silica gel forming, take out the products, mould is molding (note: perfusion model generally adopts the hardness of soft silicone to do die, so demould easily, does not damage the inside of the silicone mold products), belongs to a combination of solid and liquid, using products such as mobile phone sets, luggage sets, etc.

6. Coating

Rapid vulcanization, strong adhesion, good fluidity, easy defoaming.Catalyzed by platinum complex, non-toxic and odorless;Excellent thermal stability and cold resistance (service temperature -60℃ ~ 200℃) after molding, it has good air permeability, heat resistance and certain tensile strength;Excellent anti-slip performance, no pollution, low hardness, Strong bonding with plant glue.

High tear strength, high transparency, good tensile properties.Wear-resisting, washable, high temperature resistant;High three-dimensional level, the fabric smooth, soft, flexible texture is better, good elasticity, washable and dry cleaning.Apply to the cloth above, have the effect of anti-aging.Such as silicone gloves, rain shoes and so on.