Extruded plastic net including polypropylene - has size of filaments forming mesh calculated to reduce breakage on passage from extruder

摘要

Lightweight extruded plastic net has the lengti (L) of each filament forming the mesh of the net given by the formula L/W >64.3 (or 11.5) x Dn/Dp where L is in cm or ins. per sq. metre or square foot of net; W is the weight per sq. metre or sq. ft. in kgms or lbs., and Dn is the density of the filaments. The net also includes polypropylene filaments whose density is Dp. The net, which is pref. extruded in tubular form, is less likely to break as it is drawn from the extrusion head and cooled.