Patent ID: 6234171
Filing Date: 2001-05-22
Classification: A41D,B32B

Abstract:
A method for making a respirator having an air-permeable sorbent-particle-containing layer and air-permeable particle-retaining layers, at least one of the layers of such respirator being a shape-retaining layer, comprising the steps of:a) forming such particle-containing layer from thermoplastic fibers and such particles, the fibers being sufficiently tacky after being formed by themselves into a particle-free web and cooled to room temperature so that the web will adhere to itself;b) combining such particle-containing layer with the particle-retaining layers so that the particle-containing layer is between the particle-retaining layers; andc) forming such layers to a generally cup-like shape, wherein the particle-containing layer is stretchable during shaping to such cup-like shape without tearing or significant loss of particles.