✅ Main features:

1. Excellent corrosion resistance

Most plastic materials (such as nylon, PE, PP, PTFE) have good chemical corrosion resistance to water, oil, alcohol, weak acid and alkali, etc., are not easy to rust, and are not affected by electrochemical reactions. They are particularly suitable for sealing in chemicals, solvents or humid environments.

2. Lightweight and easy to process

Plastic gaskets have low density and light weight, which are suitable for large-scale standard parts. At the same time, they are easy to cut, stamp or CNC process, and can produce gaskets or seals of various shapes and sizes, with strong adaptability.

3. Good electrical insulation

Nylon, polyethylene, polypropylene, etc. have natural electrical insulation properties and are widely used in electrical connections, electronic housings, instrument flanges and other occasions to prevent leakage or electrochemical reactions.

4. Certain wear resistance and elasticity

In particular, nylon gaskets have certain strength, elasticity and wear resistance, which are suitable for mild dynamic sealing or buffering occasions, such as protection, shock absorption and friction resistance between mechanical parts.

5. Limited temperature and pressure application range

The overall temperature and pressure resistance of plastic gaskets are not as good as metal or graphite gaskets, and are usually suitable for working conditions of room temperature ~100°C and pressure < 2 MPa. Some high-performance plastics such as PTFE can withstand temperatures up to 260°C.

? Introduction to common materials:

Nylon (PA) gaskets: high strength, wear resistance, oil resistance, suitable for mechanical assembly and flange spacing.

Polyethylene (PE) gaskets: good flexibility, low price, used for water pipes and low-pressure sealing.

Polypropylene (PP) gaskets: better acid and alkali resistance than PE, commonly used in chemical containers, pumps and valves.

Polytetrafluoroethylene (PTFE) gaskets: resistant to high temperature and strong corrosion, the preferred plastic sealing material in the chemical industry.

POM (polyoxymethylene) gaskets: high mechanical strength, suitable for structural sealing occasions with strength requirements.

? Application areas:

Static sealing of pipe flanges (plastic water pipes, chemical plastic pipes)

Chemical equipment, storage tanks, valve seals

Instruments, electrical equipment sealing connections

Buffers or gaskets for low-pressure mechanical assembly

Sealing and fixing between home appliances, automobiles, and plastic shells