Flexible material including active particles, process for the production thereof, and protective clothing made therefrom

A process for the production of a flexible sheet material comprising an at least substantially air-permeable carrier, spaced-apart adhesive points applied to the carrier, and active particles adapted to interact with at least one of noxious and odorous substances and fixed on said carrier by said adhesive points in a substantially uniform distribution on the carrier, wherein said spaced-apart adhesive points are applied to said carrier which is of a material which shrinks when subjected to the effect of heat, and active particles are applied to said carrier at said adhesive points while said adhesive points are still sticky, whereupon the carrier with said adhesive points and said active particles thereon is subjected to a heat treatment which results in shrinkage of said carrier and at the same time hardening of said adhesive to fix said active particles on said carrier.

In a process for the production of a flexible sheet material comprising an at least substantially air-permeable carrier to which active particles adapted to interact with at least one of noxious and odorous substances are fixed in a substantially uniform distribution by means of spaced-apart adhesive points on said carrier, the process including the steps of applying adhesive to the surface of said carrier in the form of adhesive points which are disposed at spacings from each other, then applying active particles to said surface of said carrier whereby active particles adhere to said adhesive points, and then causing hardening of said adhesive of said adhesive points to fix said active particles thereon, the improvement that the surface area of the carrier is reduced after the application thereto of said adhesive points and said active particles whereby said adhesive points with the active particles adhering thereto are moved closer together.