In terms of the use of some ordinary items, people often only care about the situation of the items. Only some materials of the items are often ignored by people, but in fact, doing so also belongs to a disguised impact. The materials are equivalent to the foundation for the items. If the foundation is not well investigated, it is impossible to say the following operations, Under what circumstances is PVC toxic? What material is PVC?
Under what circumstances is PVC toxic
PVC material itself has no toxicity. If it is not a fully polymerized monomer or degradation product, it will contain certain toxicity. Under the irradiation of high temperature and ultraviolet light, PVC will degrade. At this time, if people reuse the degraded PVC plastic products, it is easy to damage the internal system of the human body, resulting in hepatic angiosarcoma.
1. Due to the insufficient characteristics of PVC materials, people have to add a large number of additives to stabilize PVC plastics. In fact, pure PVC plastics are not toxic, but after people's transformation with a large number of additives, PVC plastics chemically react with toxic substances under the comprehensive action of a variety of additives, In other words, these additives can turn PVC plastic into a softer chemical additive phthalein. After using a large amount of PVC plastic, has a great impact on the inner kidney, liver, and so on.
2. PVC plastics include urea formaldehyde and melamine formaldehyde. If we process and manufacture PVC plastics, their reaction is incomplete, which will lead to the existence of a large amount of free formaldehyde in PVC plastics, which is a kind of cell protoplasm poison. If a bowl made of PVC materials is used to contain hot food, After human consumption, it is easy to cause the deterioration of some cells, which is harmful to human health. In addition, PVC plastic contains chlorine. When we burn it, it will produce a toxic substance and pollute the environment.
What material is PVC
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PVC, fully named polyvinyl chloride, is mainly composed of polyvinyl chloride. In addition, other components are added to enhance its heat resistance, toughness and ductility. The top layer of the surface film is lacquer, the main component in the middle is polyvinyl chloride, and the bottom layer is the back coating adhesive. It is a popular and widely used synthetic material in the world.
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Its global usage ranks second among all kinds of synthetic materials. According to statistics, in 1995 alone, the production of PVC in Europe was about 5 million tons, while its consumption was 5.3 million tons. In Germany, the average production and consumption of PVC are 1.4 million tons. PVC is being produced and applied all over the world at a growth rate of 4%. The growth rate of PVC in Southeast Asia is particularly significant, which is due to the urgent need for infrastructure construction in Southeast Asian countries. PVC is the most suitable material for producing the three-dimensional surface film.
2. PVC was first discovered by the famous French scientist (Henri Victor Regnault) in 1835. Then another German scientist (Eugen Baumann) discovered the new material in 1872. At that time, PVC material was white solid, very fragile, and had no practical application. In the early 20th century, a group of chemists such as Ivan Ostromislensky and Fritz Klatte tried to change the fragility of PVC and make it a commercial product, but they all failed.
Does the above content mainly describe under what circumstances is Xiaobian toxic to PVC? PVC is a specific introduction of what materials. Good materials have many very good advantages, and these advantages can directly facilitate everyone's handling and use. Of course, the materials can't be so perfect in every aspect. On some levels, if we do in-depth research, we can really understand some shortcomings.