PTFE base tape film generally refers to a microporous film formed from polytetrafluoroethylene as raw material and expanded and stretched.
It has a fibrillar microporous structure, and the porosity of the membrane can reach more than 88% or even higher.
PTFE is not affected by oxygen or ultraviolet light, has good flame retardancy, and has a high reflectivity to light radiation.
PTFE has outstanding high and low temperature resistance and thermal stability, and can be used for a long time at -250~260℃.
It has good wear resistance, excellent self-lubricating properties, good electrical insulation and arc resistance, and is not affected by the working environment, temperature and frequency.
Its water absorption rate is extremely small, generally between 0.001% and 0.005%, and its permeability is low.
It also has outstanding surface non-stickiness, and almost all solid materials cannot adhere to its surface.
PTFE base tape membrane has many superior properties and has a wide range of uses. However, PTFE has a large linear expansion coefficient and is prone to deformation under continuous load; it has poor resilience, low bending and compression strength, and extremely high melt viscosity , forming and secondary processing are difficult; and under long-term load, creep is large and cold flow is prone to occur. This cold flow phenomenon is one of the main reasons that currently limits its wider application.
In recent years, domestic and foreign scholars have modified pure PTFE to improve its comprehensive properties to meet different requirements.
It is a manufacturer of polytetrafluoroethylene microporous membranes that specializes in R&D, production and sales.
The materials of the ptfe base tape membrane products produced by our company are all imported raw materials, with high uniformity, stable performance and good air permeability.
It also has high filtration efficiency and can meet the filtration efficiency level requirements of sub-high efficiency, high efficiency and ultra high efficiency filters.