Composite base material root resistant waterproof sheet material and preparation method thereof

Abstract

The invention discloses a composite base material root resistant waterproof sheet material. The sheet material is a multi-layer coextrusion composite sheet, including two outer layers and at least a three layer structure between the two and formed by alternately stacking of a buffer layer and a matrix layer; the outer layer is non-woven fabric; the buffer layer is modified polymer mixed polyethylene; the modified polymer mixed polyethylene comprises 40%-60% of linear low density polyethylene, 25%-35% of metallocene and 15%-25% of ethylene acrylic acid; the base material is a at least seven layer structure formed by alternately stacking of a nylon layer and a heat sealing layer, wherein the nylon accounts for more than 30% of the total weight of the matrix layer. The invention also discloses a preparation method of the sheet material, and the method employs fusion coextrusion. The sheet material of the invention has strong root resistant performance and waterproof performance, and is light and transparent, and suitable for application.

Description

technical field [0001] The invention relates to a waterproof material, in particular to a polymer composite tire base root puncture-resistant waterproof sheet and a preparation method thereof. Background technique [0002] In recent years, with people's demand for green health, ecological buildings have gradually received attention and development. The specific application is to build planting systems in buildings, such as planting roofs, green roofs, planting platforms in underground garages, etc. to improve the living environment and improve the quality of life . Planting systems are usually built on non-natural bases, such as building floors, walls, etc., which are very important for the protection of buildings, especially in terms of waterproofing and leakage. Traditional waterproof materials or coatings are mostly single polymer materials, which are difficult to resist the extension of plant root tips, and are easily punctured by plant roots, destroying the building an...

AI Technical Summary

Problems solved by technology

Non-woven fabric and other polymer layers are adhered on both sides of the metal base, and the density of the metal base such as copper foil itself is used to achieve root resistance; the performance difference between metal and polymer is large, and the compatibility is not good. Dimensional stability is poor, easy to peel off, and metals are prone to corrosion in high humidity environments

Asphalt is a common waterproof material. The effect of root resistance is achieved by adding chemical root resistance components to inhibit root growth. However, modified asphalt is prone to segregation during storage and transportation, and its properties are not uniform. The process is relatively complicated and the cost high, difficult to promote

The combination of the above two can further improve the root puncture resistance and waterproof performance, but still cannot solve the above problems

In addition, the existing root puncture-resistant waterproof materials are all opaque materials and have poor flexibility, so their application in special landscape design or soilless planting is limited

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