Feeding fluff, powder, and a pinch of pellets.When an extruder feed system combines pellets with powders and/or regrind flake, the powder and flake are usually the minor ingredients in the mix. But an unusual custom-designed system from CRG CRG Centre for Research on Globalisation CRG Council for Responsible Genetics CRG Contingency Response Group CRG Citizens for Responsible Government CRG Corporate Renaissance Group CRG Columbia River Gorge CRG Consulting Resource Group CRG Columbia Resource Group Logics Inc., Green Bay, Wis., uses continuous gravimetric blenders to feed very large amounts of mineral fillers, regrind, and powdered rubber from recycled tires together with minute amounts of pelletized concentrates. Regrind is fed at 4000 lb/hr. Calcium carbonate calcium carbonate, CaCO3, white chemical compound that is the most common nonsiliceous mineral. It occurs in two crystal forms: calcite, which is hexagonal, and aragonite, which is rhombohedral. , clay, and powdered rubber together make up roughly another 4000 lb/hr. Meanwhile, specially controlled vibratory vibratory /vi·bra·to·ry/ (vi´brah-tor?e) vibrating or causing vibration. vibratory vibrating or causing vibration; vibritile. feeders add as little as 0.25 lb/hr up to 100 lb/hr of pelletized materials. Such a formulation would typically pass through a twin-screw mixer or extruder and a pelletizer before it could be extruded into sheet. But CRG's customer skips the compounding step and directly extrudes monolayer mon·o·lay·er n. 1. A film or layer one molecule thick formed at the interface between water and either oil or air by a substance such as a partially esterified fatty acid that contains both hydrophobic and hydrophilic groups in the same polyolefin sheet. Tel: (920) 884-7400 * PT Direct 857NZ [ILLUSTRATION OMITTED] |
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