This film production line use PE air-permeable plastic granule as raw material, and adopts casting extrusion method to melt-extrude the PE-modified air-permeable plastic granule containing inorganic filler through a flat die and the roller is stretched at a high rate to produce a sub-nanometer micro breathable film.

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Disposable medical protective clothing materials need to meet the requirements of “three resistance and one resistance” (that is, water repellent, blood repellent, alcohol repellent, and anti-static) requirements of micro-nano grade materials. This composite material can be combined with different materials, such as polyethylene/polypropylene spun-bonded non-woven fabric, combined with breathable micro-porous film or other non-woven fabric, or spun lace non-woven fabric combined with breathable micro-porous film, or Wooden paddle composite spun lace non-woven fabric. In addition, some membranes made of PTFE can be used for high-end protective clothing fabrics. In the composite of these materials, the breathable micro-porous film is particularly important.

The so-called breathable film is a kind of functional inorganic product that is uniformly mixed into the polyolefin raw material, so that the product has pores due to high stretching during the film formation process, so as to have the function of breathability and moisture transmission; the function of the breathable film In short: Waterproof and breathable (moisture), take the most commonly used PE as a carrier as an example.