Under the tensile force of the PTFE biaxially stretched film, 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 transmitted to the middle area of the base tape in sequence, and then the middle part of the base tape is stretched.
Therefore, biaxially stretched films tend to be thin on both sides and thick in the middle.
High-temperature stretching makes the film thinner more easily than low-temperature stretching.
In the transverse stretching direction of the film, in areas with the same distance from the edge, the pore diameter of the film stretched at high temperature is generally larger; at the same stretching temperature, the pore diameter of the area closer to the edge of the film is also generally higher than that of the middle area. .
The size and thickness of the film pores correspond to each other. In areas where the film thickness is small, the pore size is also large due to the larger fiber elongation, and vice versa.
The ptfe biaxially stretched film produced has strong hydrophobicity, chemical resistance, waterproofness and low wind resistance, and can achieve high dust removal efficiency. For some extremely small objects with a diameter of 0.1um-0.3um For particles, the filtration level can reach H13-U16.
In addition, biaxially oriented film can undoubtedly achieve ultra-low emissions in intercepting various types of dust generated during the production process of the company, and it fully complies with current environmental protection standards.
The ptfe materials produced by the manufacturer are all imported raw materials, with a full set of advanced production equipment, an advanced clean room and an independent composite slitting workshop to ensure the production quality of ptfe membrane; imported from the United States It has advanced production and testing instruments to test the quality of PTFE film, and has passed international SGS testing and certification, as well as ISI testing and certification.
Interested parties can enter the store and contact us.
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