Patent ID: 8844158
Filing Date: 2014-09-30
Classification: A61F,A61L,B32B,D04H,Y10T

Abstract:
1. Felt material having a blocking function for climatic regulation, comprising at least one felt layer and at least one fluid absorbing layer deployed at least in partial areas, characterized in that at least one fluid absorbing layer is an absorber-containing layer, at least one felt layer and the absorber-containing layer are mutually needled to each other, an absorber in the absorber-containing layer is limited in its three-dimensional expansion by the felt layer(s) and/or by locking elements, the absorber is a superabsorber polymer, or a swellable polymer selected from the group consisting of polyacrylic acid, polyacrylic acid copolymers, crosslinked sodium polyacrylate, casein, egg white and thermostatic elastomer composites, or a superabsorber polymer fiber, the felt material is at least partial permeable to air in dry, open state, and the felt material is closed when it comes into contact with a fluid, water or water vapor with the extension of the absorber, wherein the fluid transport through the felt material is limited or stopped by a swollen absorber.