plastic granules .plastic raw materials in pellets for industry. colorant for polymers in granules

background batch chemical chemistry clear closeup colorant colorless density ethylene factory fine for grained granule granules horizontal industrial industry injection low manufacturing master material materials mold molding particle pellets plastic polyethylene polymer polymerization polymers polypropylene polystyrene polythene production protoplast pvc raw recycling research resin small technology thermoplastic translucent transparent white working