is dependent upon the same factors discussed above with respect to the heated embossing rolls a second alternative is the use of a heated smooth calender 34 heated to a temperature sufficient to effect thermal bonding again the temperature selected is dependent upon the same factors discussed above in fig1 the belt bonder 26 is shown in the line before the embossing calender 20 and the smooth calender 34 is shown after the embossing calender 20 this arrangement is not required and can be reversed if desired after the web has been thermally embossed and if used subjected to the auxiliary thermal bonding step the finished fabric 36 is collected on a conventional windup 38 a 50 50 by weight mixture of fiber a celanese fortrel type 310 polyester 1 5 denier 11 2 inch staple and fiber b a low melting polyester 2 25 denier 11 2 inch staple fiber the polyester polymer from which the fiber was drawn had a dsc melting point of 130 u00b0 c and a density of 1 24 grams per cubic centimeter was processed through an opener blender and fed to a card which deposited a 240 grains per square yard web on an endless belt.