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Woodworking & Cabinetry (3553-WC)
Woodworking & Cabinetry
Woodworking & Cabinetry - Woodworkers manufacture a variety of products such as cabinets and furniture, using wood, veneers, and laminates. They often combine and incorporate different materials into wood, or utilize non-wood products into their finished designs. Panels of clear, colored or ...
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Styrofoam Cups & Plates (3086-CP)

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Styrofoam Cups & Plates (3086-CP)
Expanded polystyrene foam (EPF) is a plastic material that has special properties due to its structure. Composed of individual cells of low density polystyrene, EPF is extraordinarily light and can support many times its own weight in water. Because its cells are not interconnected, heat cannot travel through EPF easily, so it is a great insulator. EPF is used in flotation devices, insulation, egg cartons, flats for meat and produce, sandwich and hamburger boxes, coffee cups, plates, peanut packaging, and picnic coolers. Although it is generally called Styrofoam, Styrofoam is a trademark of Dow Chemical Company and refers specifically to a type of hard, blue EPF used mainly in boating. To make small-cell EPF, workers then melt, add a blowing agent to, and extrude the beads. To produce smooth-skinned EPF, they pre-expand the beads, dramatically reducing their density. Next they heat and expand them before allowing them to sit for 24 hours so that they can cool and harden. The beads are then fed into a mold of the desired shape. The production of Styrofoam Cups & Plates often utilize PTFE Molds for efficient high-speed manufacturing, due to their inherent heat resistance and non-stick properties.

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