Rubber and plastic seals are essential components used in various applications to ensure effective sealing. They generally fall into two categories: rubber seals and plastic seals, each with distinct properties and uses.

Rubber Seals:

Rubber seals are made from natural or synthetic rubber. They are valued for their softness, elasticity, and resistance to corrosion. These seals are commonly used in applications that require high flexibility and sealing effectiveness, such as automotive engines, piping systems, and mechanical equipment. Typical examples include O-rings, flat washers, gaskets, and rubber rings. The primary function of rubber seals is to create a dependable barrier that prevents the leakage of liquids, gases, or dust through joints or interfaces. They are crucial for ensuring the proper functioning of equipment, extending its service life, and enhancing operational efficiency.

Plastic Seals:

Plastic seals are crafted from synthetic plastic materials such as polypropylene (PP), polyethylene (PE), and polyvinyl chloride (PVC). They offer good chemical resistance and shape stability, making them suitable for specific applications like the chemical industry and food processing. Common plastic seals include O-rings, gaskets, sealing strips, and hose seals. The selection of plastic seals is often based on their ability to withstand various chemicals and environmental conditions.

Are They Harmful to the Body?

For most people, rubber seals are generally safe under normal usage conditions and typically do not pose a direct health risk. However, certain plastics may contain chemicals that could be harmful to health. For instance, substances like bisphenol A (BPA) in some plastics are a concern. To mitigate potential risks, it is advisable to choose seals that adhere to relevant safety standards and avoid prolonged exposure to high temperatures, which can lead to the release of harmful chemicals.