1.Manufacturing process of ePTFE expanded Polytetrafluoroethylene microporous waterproof and breathable film.
The production of expanded polytetrafluoroethylene microporous waterproof and breathable membrane is ePTFE microporous waterproof and breathable membrane made by multi-directional stretching high-temperature sintering process. Using self-made multi-directional stretcher, PTFE raw materials and additives Mixing according to a certain proportion, through flat vulcanizer molding, double-roll calendering, drying, stretching, sintering, and cooling processes, you can produce ePTFE microporous waterproof expanded polytetrafluoroethylene that is white, soft and full of good elasticity. Breathable membrane.The specific method is to mix the raw materials of polytetrafluoroethylene dispersion resin and additives in a certain proportion to obtain polytetrafluoroethylene paste, and then put the adjusted paste into a customized mold for compaction under a certain pressure to obtain Slightly smaller than the diameter of the barrel of the extruder, and the solvent oil is evenly dispersed, put the billets into the extruder, adjust the extrusion temperature and extrusion speed, and then extrude all the billets well to obtain extrusion The extruded rod is placed on the double-roller calender equipment and after the calendering process, it becomes a film-like sheet with a certain thickness; then under certain heating conditions, the film material is stretched in one direction or two directions. It has become a finished product of expanded polytetrafluoroethylene microporous waterproof and breathable membrane material. The core of the processing technology of expanded polytetrafluoroethylene microporous waterproof and breathable membrane material is extrusion molding, stretching to form holes, and sintering to fix.
2.ePTFE Characteristics
1-Breathable: The micropore diameter is 700 times larger than that of water vapor. It is waterproof and allows air to pass through smoothly, which can effectively dissipate heat, prevent frost on the inner wall of the product, and balance the air pressure difference between the inside and outside.
2-Dustproof: The microporous channels form a net-like three-dimensional structure in the membrane, and the uniform and dense distribution of micropores makes dust encounter barriers to achieve an effective dust-proof effect, and the smallest particles of 0.1 microns can be captured.
3-Corrosion resistance, strong acid and alkali resistance, high and low temperature resistance, weather resistance, etc...
4-anti-UV.
5-Thin and lightweight, it brings convenience to design and production, and is the most ideal waterproof and breathable product.
6-Installation: Easy to install, can be processed by hand or simple punching.
3.ePTFE expanded polytetrafluoroethylene application case
1-Used as a HEPA filter in an air purifier.
2-Used in electronic products such as gas detectors, batteries, hearing aids, video cameras, cameras, sensors, sensors, underwater equipment and testing instruments.
3-Medical function. Expanded polytetrafluoroethylene (expanded PTFE) is a new type of medical polymer material with good blood compatibility and resistance to biological aging. It is used to manufacture artificial blood vessels, heart patches and other medical products. From a medical point of view, it is currently the most ideal biological tissue substitute.
4-For Textiles.