ECTFE melt-blown film and preparation method thereof

The invention discloses an ECTFE melt-blown film and a preparation method thereof. The melt-blown film is composed of superfine fibers with the diameter of 0.1 [mu] m-5 [mu] m; and the aperture of at least 60% of the melt-blown film is 0.3 [mu] m-0. 7 [mu] m, the aperture of less than 20% of the melt-blown film is 0.1 [mu] m-0. 3 [mu] m, and the aperture of less than 20% of the melt-blown film is 0.7 [mu] m-1. 0 [mu] m. The melt-blown film disclosed by the invention has the advantages of high tensile strength, high elongation at break, small average pore size, high filtering precision, suitability for high-temperature-resistant, acid-base-resistant and corrosion-resistant environments and the like. 本发明公开了一种ECTFE熔喷膜及其制备方法，所述熔喷膜由直径为0.1μm～5μm的超细纤维组成，至少60％的所述熔喷膜的孔径在0.3μm～0.7μm之间，小于20％的所述熔喷膜的孔径在0.1μm～0.3μm之间，小于20％的所述熔喷膜的孔径在0.7μm～1.0μm之间。本发明的熔喷膜具有拉伸强度大，断裂伸长率高，平均孔径小，过滤精度高，适用于耐高温、耐酸碱及耐腐蚀环境等优点。