Machine for making an impermeable join on impermeable three-layer or two-layer fabrics

Abstract

A machine for making an impermeable join between two panels made of three-layer or two-layer textile material including at least an internal layer, already joined along a joining line by way of a stitching operation, simple or complex, or by ultrasound joining or other, includes first movement element able to move the textile material in a direction of feed and impermeabilization element able to achieve the impermeabilization along said joining line and including second movement element able to move an impermeable tape for hot taping with adhesive, in order to determine the hot application and welding on the internal layer along the joining line. The impermeabilization element also comprise heating element suitable to effect a cauterization of the material of the internal layer and positionable directly upstream of the second movement element in the direction of feed, so that the hot taping can be effected immediately after the cauterization.

1 - 18 . (canceled) 
     
     
         19 . A fabric comprising an impermeable join between two panels made of three-layer or two-layer textile material each comprising at least an internal layer,
 the two panels joined along a joining line by a stitching, simple or complex, or ultrasound joining, or high frequency joining,   an impermeable tape for hot taping with adhesive, applied and welded hot on said internal layer of each panel along said joining line,   wherein said internal layer of each panel is cauterized to form a cauterized zone at least along said joining line and on portions lateral to said joining line.   
     
     
         20 . The fabric of  claim 19 , wherein the fabric comprises the impermeable join between the two panels made of the two-layer textile material comprising an external layer and the internal layer. 
     
     
         21 . The fabric of  claim 19 , wherein the fabric comprises the impermeable join between two panels made of the three-layer textile material comprising the three-layer fabric, formed by an external layer, an intermediate layer and the internal layer. 
     
     
         22 . The fabric of  claim 21 , wherein
 the external layer is made of textile material;   the intermediate layer is formed by a film or sheet of polymeric material functioning as a barrier against the liquids from outside to inside, and as a membrane transpirant to fluids from inside to outside; and   the internal layer is made with a complex fabric with a polymeric base.   
     
     
         23 . The fabric of  claim 21 , wherein the internal layer is selected from a fabric having a raised nap selected from the group consisting of pile, fleece, teaseled, brushed, or non-woven fabric, or fabric having a smooth surface, or fabric having relief workings. 
     
     
         24 . The fabric of  claim 19 , wherein material of the internal layer has a polymeric base modified by the cauterization to be compact, substantially without cavities or interstices between filaments or fibers that make up the threads of the internal layer, thereby eliminating the possibility of the liquids migrating through capillarity or seepage, to create a physical barrier, substantially along the joining line and in the adjacent lateral portions, against the passage of liquids from outside to inside the textile. 
     
     
         25 . The fabric of  claim 19 , wherein the fabric has a single-track cauterization zone of cauterized material which affects both the zone of the joining line and the portions adjacent to the zone of the joining line. 
     
     
         25 . The fabric of  claim 19 , wherein the fabric has a double-track cauterization cone comprising two distinct and separate tracks of cauterized material along only the lateral portions adjacent to a zone of the joining line. 
     
     
         26 . The fabric of  claim 19 , wherein the internal layer has a raised nap but in the cauterized zone the structure of the surface fibers has been modified and taken to a plastic state, flattened and partly removed. 
     
     
         27 . The fabric of  claim 19 , wherein the internal layer is a smooth fabric or has relief workings, and the heat treatment eliminates the surface down and the fabric is smooth and compact in the cauterized zone.