Medical plastic has a large market, the general performance requirements are relatively high, especially the thermal stability, biocompatibility have national and industry standards related to unite, drug compatibility, environmental protection and other aspects, only to meet the standard, in order to obtain the permit in the related fields.
Easy oxide is a very special name, many friends may be heard for the first time, but in the medical industry it is a very common. Often encounter in medical equipment or medical packaging materials that easy oxide above exceed the standard. What is the easy oxide? Refers to the ordinary environments easily react with oxygen substance. Such as iron, aluminum, copper and so on, the common understanding is the metal easy to rust. But in the medical industry, it refers to many kinds of easily with oxygen oxidation material. Organic compounds, metal powder, reducing agent, sulfur, phosphorus and other combustible substance, the cells of the body and cell membrane and fatty acids are easily oxidized, packaging materials easy oxide content is the main technical standards of the state.
Medical PVC plastics are usually used for disposable transfusion apparatus for blood (liquid), oxygen tubes, catheters, oxygen mask products and medical equipment parts. At the same time, because the ideal of transparency and appropriate cost, medicinal PVC packaging sheet also has a big share in charge material field. Because PVC is a heat sensitive plastics, in formula production generally heat stabilizer, lubricant, enhancer or modifier as many raw materials, adding these materials is to make the PVC more convenient processing and using. Many raw materials although the ideal, but does not allow the use of PVC in medical field, Medical plastic field oxide so easily because of thermal stability, raw materials cannot exceed the standard, oxide added late use stability poor performance, storage conditions and other factors resulting in products easy oxide exceed the standard, the main reason lies in the metal, atomic or molecular formula in the production process of free or fall off, reacts with oxygen and lead oxide survival. Don't underestimate the non-toxic phosphite auxiliary heat stabilizers, it can effectively chelate off the metal atoms or molecules, and PVC off hydrogen Baotuan effect, many enterprises that use this material or why there are easy oxide exceed the standard, the purity that this would require sophisticated materials.
