Polymer composite heat resisting waterproof sheet and preparation method thereof

Abstract

The invention belongs to waterproof material technical field in water conservancy and civil building engineering, and in particular discloses a macromolecule composite heat-resistance waterproof sheet used for production of waterproof coil and the preparation method. The technical proposal is that the invention consists of a middle layer consisting of polypropylene, HDPE and maleic anhydride grafting agent and surface layers consisting of linear polyethylene and HDPE bonded at two side surfaces of the middle layer; the macromolecule composite heat-resistance waterproof sheet is extruded and compounded by the middle layer and the surface layers at two sides of the middle layer; the physical performances of the formed waterproof sheet are greatly improved; by detection, the longitudinal and transverse tensile strength is more than 300N / 50mm, namely, more than 500%; the perforation resistance reaches more than 80KN / m when the thickness is more than 0.5mm and reaches 30KN / m when the thickness is less than 0.5mm, thus meeting the engineering requirement.

Description

technical field [0001] The invention belongs to the technical field of waterproof coiled materials, and in particular relates to a polymer composite heat-resistant waterproof sheet for producing waterproof coiled materials and a preparation method thereof. Background technique [0002] Self-adhesive waterproof membrane is a new type of high-grade waterproof material developed in recent years, mainly used for waterproofing of base surfaces in water conservancy and civil engineering projects. Polymer composite waterproof sheet is a kind of polymer material made of one or several synthetic resins blended and extruded and calendered. It is used as the main material of polymer composite self-adhesive waterproof membrane—that is, waterproof membrane. It is composed of a synthetic resin sheet as its base layer, a layer of "creep self-adhesive" adhesive compounded on one or both sides of it, and an isolation film layer covering the surface of the adhesive. Therefore, the performanc...

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Problems solved by technology

[0003] And the waterproof roll material that is used at present, the synthetic resin sheet that forms its base layer is made of single common low-density polyethylene or high-density polyethylene material, and the self-adhesive waterproof roll material that utilizes this base base production is due to the durability of the sheet material. Low heat——In the production process of compounding a layer of "creep self-adhesive" adhesive on the surface of the self-adhesive waterproof membrane, the temperature of the modified asphalt in the molten state is above 140 ° C, while ordinary low-density polymer The use temperature of the polymer synthetic resin sheet made of ethylene or high-density polyethylene is between 110-130°C. Therefore, the waterproof membrane formed by covering the asphalt adhesive with the polymer synthetic resin sheet will shrink, wrinkle or even Fracture phenomenon

In addition, the longitudinal and transverse fracture tensile strength of the polymer synthetic resin sheet constituting the self-adhesive waterproof membrane base layer is less than 100N / 50mm, the longitudinal and transverse fracture elongation is less than 400%, and the tear strength is less than 60KN / m, that is, due to The performance defects of the polymer synthetic resin sheet composed of ordinary low-density polyethylene or high-density polyethylene make the self-adhesive waterproof membrane formed suffer from tensile strength at break, longitudinal and transverse elongation at break and tear The strength cannot meet the needs of the project

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