The product of ptfe flat membrane manufacturer is made of polytetrafluoroethylene (ptfe) suspended powder as raw material, and is formed into a microporous film after expansion and stretching.
PTFE high-efficiency filter paper has a fibrillar microporous structure. The porosity of the membrane can reach more than 88% or even higher. Moreover, the membrane has 1.4 billion micropores per square centimeter, with a pore diameter ranging from 0.1um to 0.5um, high-efficiency filter paper has high and low temperature resistance (-200℃-260℃). It will not age, split, discolor, and has strong weather resistance after long-term use.
Under the tensile force, the fibrils are pulled out from the PTFE resin particles. As the force increases, the length of the fibrils increases and the film becomes thinner.
When the fibril becomes no longer extensible, the force is transferred to the middle area of the base tape in turn, and then the middle part of the base tape is stretched.
Therefore, the biaxially stretched film tends to be thin on both sides and thick in the middle.
High temperature stretching is easier than low temperature stretching to make the film thinner.
In the transverse stretching direction of the film, in the area at the same distance from the edge, the pore size of the film stretched at high temperature is generally larger; at the same stretching temperature, the pore size in the area closer to the edge of the film is also generally larger than middle area.
The size of the film pores corresponds to the thickness of the film. In areas where the film thickness is small, the pores will be larger due to the larger fiber elongation, and vice versa.
?ptfe flat membrane manufacturer is a high-tech enterprise focusing on the research, development, production and sales of fluorine material films. It strives for excellence in product quality and occupies a dominant position in the market with its unique stable performance.
Our membrane materials are all imported raw materials, with a full set of domestic advanced production equipment and advanced production technology. Our products have passed ISO9001 quality management system certification. The testing standards strictly follow the EU standard EN1822. Membrane products are tested using the MPPS method.
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