MULTILAYER COMPOSITE-TYPE WATERPROOFING SHEET AND PREPARATION METHOD THEREOF

摘要

PURPOSE: A multilayer composite-type waterproofing sheet and its preparation method are provided, to obtain a soft waterproofing sheet having excellent extrusion moldability, waterproofing confidence, mechanical properties, weather resistance, durability and thermal fusing property. CONSTITUTION: The multilayer composite-type waterproofing sheet comprises a thermoplastic elastomeric waterproofing sheet positioned at upper and lower layers; and a central reinforcing material positioned between the upper and lower layers. Preferably the thermoplastic elastomeric waterproofing sheet is made by using a resin comprising 50-90 parts by weight of a polyolefin-based thermoplastic elastomer, 5-30 parts by weight of a linear low density polyethylene and 5-30 parts by weight of a modified polyethylene. Preferably the central reinforcing material is a glass fiber-based or polyester-based reinforcing material.