A kind of double tire base pre-laid waterproofing membrane and its preparation method

Abstract

This application relates to the field of building waterproofing, specifically disclosing a double-layer pre-laid waterproof membrane and its preparation method. The double-layer pre-laid waterproof membrane includes a silicone oil film layer, a first asphalt self-adhesive layer, a polyester base layer, a second asphalt self-adhesive layer, a polyethylene base layer, a third asphalt self-adhesive layer, and an anti-adhesive layer. The raw materials of the polyethylene base layer include: 50-60 parts linear low-density polyethylene, 8-10 parts EVA, 8-10 parts chlorinated polyethylene, 3-5 parts MAH-g-LLDPE, 0.2-0.3 parts organically modified montmorillonite, 0.3-0.5 parts nano-sepiolite, 0.2-0.4 parts coupling agent, and 0.1-0.2 parts carbon black masterbatch. The waterproof membrane of this application achieves simultaneous improvement in tensile strength and elongation at break, can adapt to building deformation, is not prone to cracking and leakage, and has a maximum tensile strength of over 800 N / 50 mm and an elongation at break of over 400%.