Do you know the material ptfe biaxially stretched film? Do you know what it is used for? Let us learn about it in detail below.
In the 1960s, PuPont first used uniaxial stretching to produce PTFE stretched membranes, but the size of the micropores, porosity, and membrane strength were not ideal.
In the mid-1970s, the American Gore Company successfully developed expanded PTFE microporous films using biaxial stretching technology. After that, Japan made great progress in research in this area and applied for a number of patents.
my country began to develop PTFE stretched membranes after the 1970s, but it has been stuck in the uniaxial stretching process for a long time. Since the 1990s, some units have developed and produced biaxially stretched microfiltration membranes.
After the dry PTFE fine powder is fully mixed with additives, it enters the extruder. The powder is pushed and extruded into strips of PTFE, as shown in Figure 1, and then rolled into a film under a rolling machine. It is heated and volatilized. After removing the additives, it can be stretched longitudinally and transversely, and then through heat treatment, shaping, cutting and rolling to obtain ptfe biaxially stretched film.
The biaxial stretching process of ptfe biaxially stretched film gives the film good void characteristics. After the film is stretched in different directions, the structure of the micropores and agglomeration of the film changes, and at the same time the mechanical properties of the film are improved. Has anisotropic properties.
Suzhou New Material Technology Co., Ltd. is a fluorine material film manufacturer integrating production, sales and customization.
The company has advanced ptfe film production lines and composite production lines.
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