Chemical stability of geotextile filters - HDPE anti-seepage geotextile membranes have excellent chemical stability and are widely used in sewage treatment, chemical reaction tanks, and landfill sites. High and low temperature resistance, asphalt resistance, oil and tar resistance, acid resistance, alkali resistance, salt resistance and more than 80 kinds of strong acid and strong alkali chemical media corrosion resistance of composite geotextile filter screen -- hdpe anti-seepage geomembrane has excellent anti-aging, anti ultraviolet, anti decomposition capabilities, can be used, and the service life of the material can reach 50-70 years, providing a good material guarantee for environmental anti-seepage.