What material is polyvinyl chloride

Plastic products are exposed to many places in our daily lives. For example, the slippers we wear, computer keyboards, toys, or drinking cups are all plastic products. The chemical name of this material is called polyvinyl chloride, which is composed of an amorphous thermoplastic resin made by the polymerization of vinyl chloride monomer with certain additives, stabilizers, lubricants and fillers. Next, let's take a look at what kind of material is PVC?

● What material is polyvinyl chloride?

Polyvinyl chloride is actually made by polymerization of vinyl chloride monomer and is one of the commonly used thermoplastic plastics. Its trade name is abbreviated as "Chlorine Plastic", and its English abbreviation is PVC. Pure polyvinyl chloride resin is a very hard thermoplastic substance, its decomposition temperature is very close to the plasticization temperature, and its mechanical strength is relatively poor. Therefore, products that cannot be molded with polyvinyl chloride resin must be added with certain plasticizers, stabilizers, fillers, etc. to improve their performance, and then made into polyvinyl chloride plastics, and then processed into various products. Polyvinyl chloride can be divided into rigid polyvinyl chloride and soft polyvinyl chloride according to the amount of plasticizer added.

● What are the properties of PVC?

1. Soft PVC generally contains 30-50% plasticizer. Because the texture is very soft, the strength will be relatively high; it has very good air tightness and impermeability.

2. Rigid PVC can only be made by adding a small amount of plasticizer. Its characteristics are very hard texture, high mechanical strength, and good chemical resistance.

3. Polyvinyl chloride plastic has poor heat resistance, and its strength is greatly affected by temperature. The strength at -20°C is 80% lower than that at 20°C. Therefore, film products are not easy to store and use at low temperatures; the temperature used for soft products cannot exceed 45°C, and the temperature used for hard products cannot exceed 60°C. When exposed to long-term light, it will age and become brittle.

4. In order to prevent thermal decomposition of polyvinyl chloride film during processing, a heat stabilizer needs to be added. Because the heat stabilizer contains a certain amount of lead salt, the polyvinyl chloride plastic is toxic, so it cannot be used as food packaging Things.

5. When polyvinyl chloride comes in contact with organic solvents and naphthalene and other insect repellents, it will become sticky and melted, and it is easy to absorb peculiar smells. Because plasticizers are relatively volatile, they should not be stored for too long.

The above is the content of the relevant knowledge of what material PVC is. In summary, PVC is a kind of plastic product, and its application range is very wide. The performance of PVC is also very much. If you don’t understand, you can also consult Henan Saifu Trading Co., Ltd. I believe you will get more results.