Polyethylene fiber used in construction roofing, waterproofing workshop, underground water, ground moisture, toilet water, vapor barrier insulation, interior decoration waterproof, water dam seepage canal seepage, seepage pools library, metallurgical and chemical pollution seepage, Pipeline waterproof, waterproof mine, tunnel waterproofing, artificial lake water, residential areas and plaza fountain waterproof. Polyethylene fiber is a non-toxic and pollution-free green products, has a good overall technical performance: high tensile strength. Impermeability capability, low temperature flexibility, linear expansion coefficient is small, easy adhesion, friction coefficient, good stability. Deformation adaptability to adapt to a wide temperature range, long service life of more than 50 years. Construction professionals, shelf 5-10 years.