A composite geomembrane

Abstract

A composite geomembrane is provided. The composite geomembrane comprises a non-woven fabric layer, a geotechnical cloth layer and an impermeable membrane layer. The impermeable membrane layer comprises a first impermeable layer, a second impermeable layer and a third impermeable layer. The first impermeable layer, the second impermeable layer and the third impermeable layer are combined in order. The impermeable membrane layer is prepared from 30-80 parts by weight of high density polyethylene and 40-60 parts by weight of linear high density polyethylene. The impermeable membrane layer also comprises following auxiliary materials by weight: 0.05-0.4 part of an antioxidant, 0.1-0.6 part of an ultraviolet-light-resistant absorbent, 0.1-0.3 part of an anti-ageing agent, 0.05-0.5 part of carbon black, 0.1-0.5 part by weight of a fire retardant, and the like. The composite geomembrane has high impermeability, chemical stability and penetration resistance, effectively prevents permeation of harmful chemical compounds, and has good stretching flexibility and resistance to stress cracking. In addition, addition of the auxiliary materials improves safety performance of the composite geomembrane and largely prolongs the service lifetime of the composite geomembrane.

Description

technical field [0001] The invention belongs to the field of waterproof materials, in particular to a geomembrane, in particular to a composite geomembrane. Background technique [0002] Geomembrane is a very good waterproof and anti-seepage basic building material. At present, it has been widely used in infrastructure construction in many fields, such as environmental sanitation, water conservancy, municipal engineering, gardens, petrochemicals, agriculture, mining, aquaculture, etc. Existing geomembranes are mainly made of high-density polyethylene single-layer or double-layer anti-seepage membrane technology. Such geomembranes are relatively brittle. During use or construction, crack-induced stress can easily make the anti-seepage layer of the membrane Cracks appear, and even the geomembrane is damaged, which greatly shortens the service life of the geomembrane. In addition, high-density polyethylene, the main material of the existing geomembrane, is a flammable materia...

AI Technical Summary

Problems solved by technology

Existing geomembranes are mainly made of high-density polyethylene single-layer or double-layer anti-seepage membrane technology. Such geomembranes are relatively brittle. During use or construction, crack-induced stress can easily make the anti-seepage layer of the membrane Cracks appear, and even the geomembrane is damaged, which greatly shortens the service life of the geomembrane

In addition, high-density polyethylene, the main material of the existing geomembrane, is a flammable material, which is prone to fire when exposed to open flames, and poses a great safety hazard