Grace Davison Applications Engineers can help you select the optimal grade for your needs. When components of PVC formulations accumulate on calender rolls and extruder screws, two problems occur - undesirable surface effects start happening and additional cleaning costs are incurred when switching between colored formulations. The chief cause of the plateout problem is incompatibility between various additives and raw material. Mold Release Injection molded parts produced by deep-drawing techniques are often difficult to separate after packing. Items such as beakers, boxes, cups and glasses stick together.
Plastic parts are easier to remove, shortening further processing time.
During storage, transport and handling, the fine particles of pigments tend to form agglomerates. These are often difficult to disperse, leading to non-homogeneous distribution of color in plastics. Plastic powder and powder blends form clumps, especially if the materials are hygroscopic. The result is a free-flowing powder that is easy to dispense. Over the past few years combination products comprising silica gels and slip aids have shown significant advantages in polymer film and injection moulding applications.