or use with commercial fishing boat equipment the polymer is filled with a filler chosen from talc barium sulfate barytes calcium sulfate clay diatomatious earth silica alumina kaolin carbon aluminum hydroxide titanium dioxide glass wollastonite organosilicone powders sand calcium silicate and magnesium silicate calcium silicate iron oxides aluminum silicate and combination mixtures of these these filler materials vary considerably in their chemical and physical properties and are not to be considered to give equivalent results some are hydrophobic others anhydrous others hydrophilic some are crystalline in two directions and amorphous in the third others are crystalline in three directions and even others are non crystalline the specific filler material chosen will also affect the practical range of particle size for the filler the combination of a particular polymer with a specific filler will not provide identical results as different polymer with a different filler what is uniform across the choices is that a filled melt processes polymer will have a higher specific gravity and be more wear resistant than the non filled version of the polymer polyester rope filled with particles of any of barium sulfate barytes silica calcium sulfate alumina or a silicate of calcium magnesium or aluminum appear to give excellent results particle sizes in the range of about 0 25 to about 20 microns with a size deviation of plus to minus 25 also give excellent results the resultant rope product of the present.