Method for manufacturing an underlay material, and underlay material

Abstract

A method for manufacturing an underlay material ( 8 ) to be set under parquet or a laminate, the underlay material including a sheet material layer ( 1 ) and a flexible cellular plastic material layer ( 3 ) bonded under the sheet material layer, and a bottom surface of the cellular plastic layer being processed for providing an air space, whereby the bottom surface of the cellular plastic material layer ( 3 ) is processed by melting the cellular plastic material locally for providing an air space ( 9 ) and for simultaneously bonding the cellular plastic material layer to the sheet material layer ( 1 ). An underlay material manufactured by such a method is also described.

1 . A method for manufacturing an underlay material ( 8 ) to be set under parquet or a laminate, said underlay material consisting of a sheet material layer ( 1 ) and a flexible cellular plastic material layer ( 3 ) bonded under the sheet material layer, and a bottom surface of said cellular plastic layer being processed for providing an air space, characterized in that the bottom surface of the cellular plastic material layer ( 3 ) is processed by melting the cellular plastic material locally for providing an air space ( 9 ) and for simultaneously bonding the cellular plastic material layer to the sheet material layer ( 1 ). 
     
     
         2 . A method according to  claim 1 , characterized in that the melting and bonding of the cellular plastic material layer ( 3 ) to the sheet material layer ( 1 ) is conducted by conveying the material layers through between rolls  5  and  6  set in opposition to each other, whereby the roll ( 6 ) placing itself against the cellular plastic material has its surface formed with uniform protrusions ( 7 ,  7 ′), the roll placing itself against the cellular plastic material layer having at least its protrusions heated. 
     
     
         3 . A method according to  claim 1 , characterized in that the cellular plastic material layer ( 3 ) is by melting formed with at least two sets of continuous and parallel grooves ( 9 ), the grooves of various sets crossing each other to make up a pattern of squares or lozenges on the surface of the cellular plastic material layer. 
     
     
         4 . A method according to  claim 1 , characterized in that the sheet material layer ( 1 ) is made of plastic, paper or cardboard and is preferably in the form of a material web. 
     
     
         5 . A method according to  claim 1 , characterized in that the cellular plastic material layer ( 3 ) is made of a foamed polymer or polymer blend and is preferably in the form of a material web. 
     
     
         6 . An underlay material ( 8 ) to be placed under parquet or a laminate, said underlay material consisting of a sheet material layer ( 1 ) and a flexible cellular plastic material layer ( 3 ) bonded under the sheet material layer, and said cellular plastic having recesses on its bottom surface for providing an air space ( 9 ), characterized in that the cellular plastic material layer ( 3 ) is bonded to the sheet material layer ( 1 ) only by melting the plastic material at the recesses ( 9 ) formed in the cellular plastic material layer. 
     
     
         7 . An underlay material ( 8 ) according to  claim 6 , characterized in that the recesses of the cellular plastic material layer ( 3 ) consist of at least two sets of continuous and parallel grooves ( 9 ), the grooves of various sets crossing each other to make up a pattern of squares or lozenges. 
     
     
         8 . An underlay material ( 8 ) according to  claim 6 , characterized in that the sheet material layer ( 1 ) is made of plastic, paper or cardboard. 
     
     
         9 . An underlay material ( 8 ) according to  claim 6 , characterized in that the cellular plastic material layer ( 3 ) is made of a foamed polymer or polymer blend. 
     
     
         10 . An underlay material ( 8 ) according to  claim 6 , characterized in that the underlay material ( 8 ) is in the form of a material web. 
     
     
         11 . A method according to  claim 2 , characterized in that the cellular plastic material layer ( 3 ) is by melting formed with at least two sets of continuous and parallel grooves ( 9 ), the grooves of various sets crossing each other to make up a pattern of squares or lozenges on the surface of the cellular plastic material layer. 
     
     
         12 . An underlay material ( 8 ) according to  claim 7 , characterized in that the sheet material layer ( 1 ) is made of plastic, paper or cardboard. 
     
     
         13 . An underlay material ( 8 ) according to  claim 7 , characterized in that the cellular plastic material layer ( 3 ) is made of a foamed polymer or polymer blend. 
     
     
         14 . An underlay material ( 8 ) according to  claim 8 , characterized in that the cellular plastic material layer ( 3 ) is made of a foamed polymer or polymer blend.