Footwear with last area sealing and method for its production

Abstract

Footwear is described that has an insole with an insole bottom; an upper which is constructed with an outer material and which has an end region on the sole side; and a waterproof upper functional layer, which lines at least partially the outer material on its inside and also has an end region on the sole side. The upper has a lasting margin area, in which the end region of the upper is adhered to the insole bottom by means of a lasting adhesive. An outsole is adhered to the lasting area bottom by means of an outsole adhesive. The lasting adhesive is a waterproof reactive hot melt adhesive.

1 . Footwear comprising: 
 a) an insole with an insole bottom;    b) an upper which is constructed with an outer material;    c) a waterproof upper functional layer, which forms a part of the upper and at least partially lines the outer material of the upper on its inside, particularly in the end region of the upper;    d) in which the upper has an end region in the lasting margin area which is adhered to the insole bottom;    e) and an outsole which is adhered to the bottom of the lasted margin area;    f) wherein the lasting adhesive is a reactive hot melt adhesive which is waterproof in the reacted state.    
     
     
         2 . Footwear according to  claim 1 , in which the outsole is adhered by a waterproof reactive hot melt adhesive.  
     
     
         3 . Footwear according to  claim 2 , wherein the reactive hot melt adhesives form an enclosure that encloses the end region on the sole side of both the outer material and the upper functional layer.  
     
     
         4 . Footwear according to  claim 2 , in which the lasting adhesive and the outsole adhesive consist of the same reactive hot melt adhesive.  
     
     
         5 . Footwear according to  claim 1  or  2  wherein the reactive hot melt adhesive has been moisture cured.  
     
     
         6 . Footwear according to  claim 1  or  2  wherein the reactive hot melt adhesive is selected from the adhesive groups consisting of polyurethane hot melt adhesives and condensation resins.  
     
     
         7 . Footwear according to  claim 1  or  2  wherein the reactive hot melt adhesive is a PU reactive hot melt adhesive that is constructed with blocked isocyanate.  
     
     
         8 . Footwear according to  claim 1  or  2  in which the reactive hot melt adhesive contains a thermoplastic.  
     
     
         9 . Footwear according to  claim 1  or  2 , in which the upper functional layer is water vapor-permeable.  
     
     
         10 . Footwear according to  claim 1  or  2  in which the functional layer is porous polytetrafluoroethylene.  
     
     
         11 . Method for production of footwear, that has: 
 a) an insole with an insole bottom:    b) an upper which is constructed with an outer material and has an end region on the sole;    c) a waterproof shaft functional layer, which at least partially lines the outer material of the upper on its inside and has an end region on the sole side;    d) in which the upper has a lasting region at its end; and    e) an outsole;    wherein the process comprises:    f) adhering the upper end region to the insole bottom by means of lasting adhesive in which a reactive hot melt adhesive is used as lasting adhesive;    g) adhering an outsole to the bottom.