High-blasting-volume waterborne polyurethane condom and preparation method therefor

Abstract

The present invention provides a waterborne polyurethane condom having a high burst volume and a preparation method thereof. The method comprises the steps of: providing a waterborne polyurethane; dipping into the waterborne polyurethane and then drying, and repeating the process of dipping into the waterborne polyurethane and then drying for N times so as to obtain a waterborne polyurethane film; rolling up an end of the waterborne polyurethane film and then drying; dipping into a releasing agent, followed by drying, mold releasing, and electrical inspection to obtain a waterborne polyurethane condom; wherein N is equal to 1-5, the waterborne polyurethane is an anionic waterborne polyurethane, and the waterborne polyurethane has a 100% tensile modulus of less than or equal to 2.0 Mpa and an elongation at break of greater than or equal to 650%; the polyurethane condom prepared by the method has a burst volume of greater than 12 L, a burst pressure of greater than 1 KPa, and a 100% tensile modulus of less than or equal to 2.0 MPa.

Dependencies are inferred from the claim text.