Abstract: A method of manufacturing a bra, comprising providing a first fabric layer as an outer layer, a second fabric layer as an inner layer, and a material made of thermo-adhesive polyurethane film that joins elements between the two fabric layers in a finished bra; sprinkling the first fabric layer on a side facing the second fabric layer with a reactive hotmelt polyurethane glue, which is reactivated only once; applying the thermo-adhesive polyurethane film on a side of the second fabric layer facing the first fabric layer; superimposing the two fabric layers such that the side of the first fabric layer covered with the glue faces the second layer and the thermo-adhesive polyurethane film portions applied to the second fabric layer face the first fabric layer; joining the two layers by hot-pressing with the thermo-adhesive polyurethane film portions, and reactivating the polyurethane glue to become temporarily in a liquid phase and triggering a cross-linking process causing the glue to solidify permanently.

Abstract: Method for manufacturing a bra, comprising the steps of: providing a first fabric layer (11), designed to realize the outer layer of the underwear article, a second fabric layer (13), designed to realize the inner layer of the underwear article and a third material (17) made of thermo-adhesive polyurethane film, designed to realize permanent joining elements between the two fabric layers (11, 13) in the finished article; sprinkling the first fabric layer (11), on its side destined to face the second fabric layer (13), with a reactive “hotmelt” polyurethane glue, capable of being reactivated only once; applying said thermo-adhesive polyurethane film (17) on the side of the second fabric layer (13) destined to face the first fabric layer (11); superimposing the two fabric layers (11, 13), with the side of the first fabric layer covered with glue faced towards the second layer and the thermo-adhesive polyurethane film portions (17) applied to the second fabric layer facing the first fabric layer; joining, by hot