Patent ID: 9546303
Date: 2017-01-17
CPC Classifications: C08L,C09J,Y10T

Claim:
1. A moisture-proof material comprising a polyurethane film substrate and an adhesive layer formed on at least one surface of the substrate, which has a tensile strength of 8800-13000 psi and an elongation at break of 780-1500%, wherein the polyurethane film substrate consists of a polyurethane whose polyol component consists of polyester polyol, wherein the adhesive layer comprises a polyurethane adhesive, wherein the polyurethane adhesive comprises a curing agent, and wherein, when the moisture-proof material is cut into a tape T (1 inch width, 40 cm length), one end (1 inch length) of the tape T is adhered to a glass plate, and 30 cm in length of the tape T is adhered to the glass plate while pulling the other end of the tape along the axis direction of the tape T with a force of 2 kg, and the narrowest part of the tape T on the glass plate has a width larger than 23 mm.