| 摘要 |
PURPOSE: A geocomposite with a constituent of stable resistance against deterioration from ultraviolet is provided. CONSTITUTION: A geocomposite is composed of three layers, the outer two layers are of unwoven fabric of highly crystalline polypropylene and another one being made of a grid or sheet of polyethylene of specified physical properties. The unwoven fabric is made of a highly crystalline polypropylene having a melt-fusion index number of 10-40, a crystallization degree of 90-80% by X-ray method, a melt-fusion portion of 1% by Xylen soluble method. The grid or sheet is made of high density polyethylene resin having a melt-fusion index of 0.01-1.0, a density of 0.945-0.965g/cm¬3, MRS of above 10.
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