Manufacturers Direct Selling Nylon/ABS/PP/PC/PS/PE/PET/POM/PA PTFE Custom Plastic Injection Molding Parts

Hangzhou Bright Rubber Plastic Product Co., Ltd. is one of the leading manufacturers and suppliers of manufacturers direct selling nylon/abs/pp/pc/ps/pe/pet/pom/pa ptfe custom plastic injection molding parts in China. If you're going to buy manufacturers direct selling nylon/abs/pp/pc/ps/pe/pet/pom/pa ptfe custom plastic injection molding parts made in China, welcome to get more information from our factory. We also accept customized orders.

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Our biggest advantage is customization.
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Plastic Seals

Plastic seals are fundamental industrial components that achieve sealing, isolation, cushioning, or fixing functions through their own deformation or by filling gaps. They are widely used in scenarios such as preventing fluid (liquid or gas) leakage, blocking external contaminants, and damping vibration and noise.

Primary Applications

Leak Prevention & Sealing:​ This is the core function. Installed between two mating parts (such as flanges, threads, pistons, and cylinders), they fill microscopic surface irregularities to prevent inward or outward leakage of oil, water, air, or chemical media. Examples include automotive engine cylinder head gaskets and pipe flange O-rings.

Dust and Waterproofing (Isolation):​ Acting as static or dynamic seals, they block environmental pollutants like dust, mud, and moisture from entering precision components, ensuring normal equipment operation. Common applications include outdoor lighting fixtures, automotive parts (e.g., shock absorber seals), and household appliances.

Shock Absorption and Noise Reduction:​ Utilizing the elasticity of plastics (such as rubber elastomers), these seals absorb mechanical vibration and impact energy to reduce noise. They are frequently used in automotive chassis, pump and valve equipment, and motor bases for home appliances.

Fixing and Insulation:​ In electrical connections, plastic seals provide both fastening and anti-loosening functions while offering electrical insulation protection to prevent short circuits or electric shock risks.

Common Application Industries

Automotive Manufacturing:​ Extensive use of oil-resistant and high-temperature resistant fluoroelastomers or silicone seals in engine systems, transmissions, braking systems, and HVAC systems.

Household Appliances:​ Waterproof sealing rings for washing machines, dishwashers, and water dispensers; magnetic door gaskets for refrigerators.

Electronics & Electrical:​ Housing seals for waterproof smartphones and watches; waterproof caps for cable connectors.

Chemical and Pharmaceutical:​ Use of corrosion-resistant sealing gaskets and packing made from PTFE (Teflon) for conveying corrosive acids and alkalis.

Material Selection Determines Performance Limits

The choice of plastic material dictates the operating environment for the seal:

Silicone:​ Resistant to extreme temperatures (-60°C to 200°C) and food-grade compliant; commonly used in tableware, medical devices, and high-temperature equipment.

Fluoroelastomer (FKM/Viton):​ Offers excellent oil, acid, and high-temperature resistance; primarily used in automotive and aerospace industries.

Polytetrafluoroethylene (PTFE):​ Chemically inert to almost all chemicals with an extremely low coefficient of friction; commonly used in chemical piping and piston rings.

Polyurethane (PU):​ High abrasion resistance and strength; frequently used for lip seals in hydraulic cylinders.

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