Release time:

2021-11-12

Medical plastics have a broad market, performance requirements are generally relatively high, especially thermal stability, biocompatibility, drug compatibility, environmental protection and other aspects have relevant national and industry standards, only to meet the standards, in order to obtain a pass in the relevant fields. Easy oxide is a very special name. It may be the first time many friends have heard of it, but it is very common in the medical industry. Often encountered in medical equipment or medical packaging materials such as the above encounter easy to exceed the standard said. What is an easy oxide? It refers to a substance that is easy to chemically react with oxygen in a normal environment. For example, iron, aluminum, copper, etc., common and easy to understand is easy to rust metal. However, in the medical industry, it refers to many kinds of substances that are easy to oxidize with oxygen. Organic matter, metal powder, reducing agent, sulfur, phosphorus and other combustibles, human cells and cell membranes and fatty acids are all easy oxides. The easy oxide content of packaging materials is the main technical standard of the country. Medical PVC plastic is usually used for disposable blood transfusion (liquid) equipment, oxygen suction tube, catheter, oxygen mask and other products and medical equipment accessories. At the same time, because of the ideal transparency and appropriate cost, pharmaceutical PVC packaging sheet also occupies a large share in the field of pharmaceutical packaging materials. Because PVC is a heat-sensitive plastic, in the formulation of production generally add heat stabilizers, lubricants, enhancers or modifiers and many other raw materials, the reason for adding these raw materials is to make PVC easier to process and use. Although many raw materials are ideal, they are not allowed to be used in the field of medical PVC. The easy oxides in the field of medical plastics are caused by many factors such as insufficient thermal stability, excessive raw material oxides added, poor stability in later use, and influence of storage conditions. The main reason is that metal atoms or molecules dissociate or fall off during the formula production process, and react with oxygen to lead to the survival of easy oxides. Don't underestimate the role of non-toxic phosphite as an auxiliary heat stabilizer. It can effectively chelate the metal atoms or molecules that fall off, and at the same time, it has a group effect with the hydrogen that falls off polyvinyl chloride. Many enterprises say that the use of this raw material is still easy. Oxides exceed the standard, so the purity of the raw materials needs to be studied.