Uncoupling Mat

Abstract

An uncoupling mat includes a flexible plastic layer ( 2 ) made of film-like plastic with structuring that defines indentations ( 6 ) provided with undercuts ( 5 ) on the first side ( 4 ) and cavities ( 8 ) positioned between the indentations ( 6 ) on the opposite second side ( 7 ). A fleece or fabric ( 3 ) is securely connected to the second side ( 7 ) and covers the cavities ( 8 ). A cross-section of the indentations ( 6 ) in at least some corner regions ( 10 ) increases towards the first side ( 4 ).

I claim: 
     
         1 . An uncoupling mat ( 1 ) comprising:
 a flexible plastic layer ( 2 ) made of film-like plastic with structuring that defines indentations ( 6 ) provided with undercuts ( 5 ) on the first side ( 4 ) and cavities ( 8 ) positioned between the indentations ( 6 ) on the opposite second side ( 7 ), and   a fleece or fabric ( 3 ) securely connected to the second side ( 7 ) and covering the cavities ( 8 ),   wherein a cross-section of the indentations ( 6 ) in at least some corner regions ( 10 ) increases towards the first side ( 4 ).   
     
     
         2 . The uncoupling mat ( 1 ) according to  claim 1 , wherein the cross-section of the indentations ( 6 ) in at least some corner regions ( 10 ) increases constantly towards the first side ( 4 ). 
     
     
         3 . The uncoupling mat ( 1 ) according to  claim 1 , wherein the cross-section of the indentations ( 6 ) in at least some corner regions ( 10 ) increases constantly towards the first side ( 4 ) from the bottom ( 11 ) of the corresponding indentation ( 6 ). 
     
     
         4 . The uncoupling mat ( 1 ) according to  claim 1 , wherein the plastic layer ( 2 ) is provided with a plurality of weakening zones ( 12 ) which extend continuously between opposing side edges of the plastic layer ( 2 ). 
     
     
         5 . The uncoupling mat ( 1 ) according to  claim 4 , wherein in the weakening zones ( 12 ) comprise grooves. 
     
     
         6 . The uncoupling mat ( 1 ) according to  claim 4 , wherein the plastic layer ( 2 ) has a substantially constant thickness (d), the thickness (d) being smaller in the region of the weakening zones ( 12 ). 
     
     
         7 . The uncoupling mat ( 1 ) according to  claim 4 , wherein at least some of a first group of weakening zones ( 12 ) extend parallel to one another, said parallel weakening zones extending transversely to a longitudinal direction of the uncoupling mat ( 1 ). 
     
     
         8 . The uncoupling mat ( 1 ) according to  claim 7 , wherein at least some of a second group of weakening zones ( 12 ) extend parallel to one another, the second group of parallel weakening zones crossing the first group of parallel weakening zones at right angles. 
     
     
         9 . The uncoupling mat ( 1 ) according to  claim 4 , wherein the weakening zones ( 12 ) are arranged spaced apart from one another equally at distances being in the range of from 10 to 100 mm. 
     
     
         10 . The uncoupling mat ( 1 ) according to  claim 9 , wherein the weakening zones ( 12 ) are spaced at distances being in the range of from 10 to 50 mm. 
     
     
         11 . The uncoupling mat ( 1 ) according to  claim 4 , wherein the weakening zones ( 12 ) each extend between two rows of indentations ( 6 ). 
     
     
         12 . The uncoupling mat ( 1 ) according to  claim 1 , wherein the fleece of fabric ( 3 ) has through holes ( 13 ) with a cross-section in the range of from 0.5 to 1.0 mm 2 . 
     
     
         13 . The uncoupling mat ( 1 ) according to  claim 12 , wherein the through holes ( 13 ) include a cross-section in the range of from 0.5 to 0.8 mm 2 . 
     
     
         14 . The uncoupling mat ( 1 ) according to  claim 1 , wherein the cavities ( 8 ) cross one another and define a grid- or net-like arrangement. 
     
     
         15 . The uncoupling mat ( 1 ) according to  claim 14 , wherein the mat includes 100 to 3000 indentations ( 6 ) per square metre. 
     
     
         16 . The uncoupling mat ( 1 ) according to  claim 1 , wherein the indentations ( 6 ) cross one another and define a grid- or net-like arrangement. 
     
     
         17 . The uncoupling mat ( 1 ) according to  claim 16 , wherein the mat includes 100 to 3000 cavities ( 8 ) per square metre. 
     
     
         18 . The uncoupling mat ( 1 ) according to  claim 17 , wherein the cavities ( 8 ) at least partially have an annular cross-section. 
     
     
         19 . The uncoupling mat ( 1 ) according to  claim 18 , wherein the indentations ( 6 ) have a minimum width (B min ) in the range of from 3 to 20 mm. 
     
     
         20 . The uncoupling mat ( 1 ) according to  claim 1 , wherein the indentations ( 6 ) have a minimum width (B min ) in the range of from 3 to 20 mm and a maximum height (H max ) in the range of from 2 to 20 mm.