a self-adhesion type multilayer TPU sheet, a waterproof layer and waterproof method using the same

摘要

PURPOSE: A self-adhesion type multilayer polyurethane waterproof sheet in which the water resistance is improved, a waterproof layer using the same, and a waterproofing method are provided to improve the compliance, durability, thermal resistance, tensile strength, and water resistance. CONSTITUTION: A self-adhesion type multilayer polyurethane waterproof sheet(100) in which the water resistance is improved includes a first blown thermoplastic polyurethane film layer(101), a second blown thermoplastic polyurethane film layer(102), and a butyl synthesized rubber layer(103). The first blown thermoplastic polyurethane film layer is laminated to the thickness ratio of 1 to 4 by a co-extrusion process. The second blown thermoplastic polyurethane film layer includes slipping agent less than 2%. The second blown thermoplastic polyurethane film layer is better than the first blown thermoplastic polyurethane film layer in tensile strength, durability and so on. A release paper layer(105) is formed in the lower part of the second blown thermoplastic polyurethane film layer. The first blown thermoplastic polyurethane film layer contains polyether polyol and a pigment . The second blown thermoplastic polyurethane film layer contains an aqueous coating material(102a).