to a windup roll which is rotated at the same speed as the feed rolls since the reticulated fabric is extruded in the form of a tube it is wound up as double ply fabric however if it is desired to wind the fabric in single plies two wind up rolls can be used a slitting means can be employed between the feed rolls and the windup rolls and the edges of the fabric slit or cut thus separating the fabric into 2 single plies each of which is wound separately the weight of the reticulated fabric can be varied over a wide range by changing the width of the annular opening in the extrusion die and also by adjusting the rate of extrusion generally a fabric having a single ply weight in the range of 0 2 to 4 0 ounces per square yard is satisfactory where the reticulated fabric is to be used as an adhesive interlayer in a laminated fabric structure a weight of 0 5 to 1 0 oz sq yd is sufficient of course increased weight can be obtained by employing more than one ply of the reticulated fabric in the present invention finely divided fillers can be employed in the polymer blend prior to extrusion thereof the small particle size fillers do not affect void structure but they do tend to promote fiber formation with fewer and smaller film like junction areas most of the well known filler materials may be used in the present invention.