PVC is the abbreviation for Polyvinyl Chloride. Using non-crystalline material as raw material, it has super high performance in oxidation resistance, strong acid resistance and reduction resistance. Polyvinyl chloride also has high strength and excellent stability, and is not flammable, can resist the corrosion of climate change and other phenomena. It is a very good material, because of its high safety, so it can be seen everywhere in life.
Meanwhile, PVC, as a plastic product with huge global output, is divided into two types: soft and hard PVC, which provide different choices for different use occasions. Soft PVC is usually used as the surface material of floor and ceiling, while hard PVC material is more widely used in corrugated board, door and window structure and various chemical industry manufacturing. In addition, PVC material also has changeability. By adding different additives, the physical properties and mechanical properties of PVC can be changed, which can be used in different occasions. For example, the soft and hard PVC mentioned above can even be made into transparent materials for special needs.
PVC material not only has many advantages such as corrosion resistance, non-inflammability, insulation and oxidation resistance, but also has a high sales volume in the material market due to its reprocess-ability and low production cost. It is also thanks to its wide range of USES and affordable prices. A variety of functions did not let its worth rise, but has been occupying a piece of land in the material market with cheap price. At present, the improvement and design technology of PVC materials in China have reached the international advanced level. From the previous need to import special PVC materials from abroad, now we can use PVC developed and produced by ourselves to replace the import, and start to export products to foreign countries.
Polyvinyl chloride is also a commonly used plastic. It is made up of polyvinyl chloride resins, plasticizers, and antiaging agents. But the addition of plasticizer, anti-aging agents and other main auxiliary toxic, plastic plasticizer for daily use of polyvinyl chloride, mainly using dibutyl terephthalate, dioctyl phthalate, such as these chemicals are toxic, polyvinyl chloride anti-aging agent lead stearate is toxic. Polyvinyl chloride (PVC) products containing lead salts can precipitate lead in contact with ethanol, ether and other solvents. Polyvinyl chloride containing lead salt is used for food packaging and Fried dough sticks, Fried cakes, Fried fish, cooked meat products, cakes and snacks, which will make lead molecules spread into the oil, so it is not possible to use polyvinyl chloride plastic bags to hold food, especially not containing oil. In addition, polyvinyl chloride plastic products in higher temperature, such as 50℃ or so will slowly decompose hydrogen chloride gas, this gas is harmful to the human body, so polyvinyl chloride products should not be used as food packaging.
As disposable medical equipment products are mostly used medical-grade polyvinyl chloride (PVC) or polycarbonate (PC), and PVC processing in the thermal decomposition of steel has a strong corrosion, PC hardness, viscosity, so the plastic parts of the material requirements must be able to resist corrosion, wear and have a higher polishing performance. Most medical injection molding machines adopt the method of hard chromium plating with cylinder screw or make machine screw with stainless steel to meet the above special requirements. In addition, in order to prevent the process of PVC thermal decomposition gas, demands for dynamic template surface plating aluminum processing, but also to the peripheral sheet metal aluminum plating processing or stainless steel plate production of sheet metal, sheet metal flat-fell seam USES the non-toxic silica gel seal, in case of plastic processing of gas in the process of running outside (plastic processing process of gas can be collected through special equipment for centralized after purification treatment shall be discharged into the atmosphere).
PVC is a major source of dioxins. Dioxin (TCDD), the deadliest dioxin in the dioxins family, is a well-known carcinogen and hormone decomposer, and a toxic compound, causing great harm to humans and animals. Dioxins are produced when PVC is produced, recycled and destroyed in incinerators, or when PVC products are accidentally burned, such as in landfill.
In the case of a large number of demand, it is easy to appear mixed, uneven quality phenomenon. Especially in ordinary users to buy PVC materials, often easy to be small shop owners of the black heart boss. Poor quality PVC material in wear resistance, anti – pollution performance is far inferior to good quality PVC material. Products made of inferior PVC not only have poor functionality, but also have a very short service life. So everyone in their own purchase of PVC materials, please be sure to the relevant store for purchase. Above is about the content of what meaning PVC is, hope to be able to be helpful to everybody!