High-density polyethylene (HDPE) geomembrane and processing process thereof

Abstract

The invention relates to a high-density polyethylene (HDPE) geomembrane and a processing process thereof. The processing process comprises a first step of enabling high-density polyethylene resin with the weight ratio being 95-98% to serve as a geomembrane main ingredient, adding about 1%-6% of carbon black, anti-ageing agents, antioxidants, ultraviolet absorbents and stabilizing agents, performing mixing, and injecting the mixture between a non-woven fabric and the geomembrane; a second step of drying a geomembrane high-density polyethylene resin anti-seepage layer which is compounded well; a third step of enabling the geomembrane having undergone treatment of the second step to be subjected to pressed film treatment forming. The non-woven fabric and the geomembrane are produced and adhere to each other to form the HDPE geomembrane by one-time thermal compounding, the loss of the non-woven fabric and the geomembrane is greatly reduced while the production process is simplified, and the anti-seepage capability, chemical stability, ageing resistance and puncture resistance and the like of the anti-seepage geomembrane are improved.

Description

technical field [0001] The invention relates to a HDPE geomembrane and a processing technology thereof, belonging to the technical field of waterproof materials. Background technique [0002] The anti-seepage geomembrane is the main material for the anti-seepage layer of domestic infrastructure construction, and is widely used in infrastructure in many fields such as environmental protection, sanitation, water conservancy, aquaculture, gardens, petrochemicals, mining, transportation facilities, municipal engineering, and salt industry. building. The domestic anti-seepage geomembrane mostly uses polyethylene resin, first processes the non-woven fabric, then processes the geomembrane, and then heat-composites the non-woven fabric and the geomembrane. The geomembrane is thermally compounded twice, which reduces the chemical stability, aging resistance and mechanical strength of the geomembrane. Therefore, in some areas with high anti-seepage and anti-aging requirements (such ...

AI Technical Summary

Problems solved by technology

The domestic anti-seepage geomembrane mostly uses polyethylene resin, first processes the non-woven fabric, then processes the geomembrane, and then heat-composites the non-woven fabric and the geomembrane. The geomembrane is thermally compounded twice, which reduces the chemical stability, aging resistance and mechanical strength of the geomembrane

Therefore, in some areas with high anti-seepage and anti-aging requirements (such as the laying of high-speed railway foundations), domestic anti-seepage geomembranes cannot fully meet the engineering requirements and must rely on imported geomembranes.