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A major polycarbonate market is the production of compact discs, DVDs, and Blu-ray discs. [13] These discs are produced by injection-molding polycarbonate into a mold cavity that has on one side a metal stamper containing a negative image of the disc data, while the other mold side is a mirrored surface.
Paper converting is required for the manufacture of nearly all paper based products, such as magazines, books, newspapers, labels, bags, and general purpose paper products. [ 8 ] The process of processing pre-cut cartons or "blanks" and folding them into the appropriate shape to become finished packaging containers is known as tray forming or ...
For instance, a 6-inch-diameter (150 mm) screw at 24:1 will be 144 inches (12 ft) long, and at 32:1 it is 192 inches (16 ft) long. An L:D ratio of 25:1 is common, but some machines go up to 40:1 for more mixing and more output at the same screw diameter. Two-stage (vented) screws are typically 36:1 to account for the two extra zones.
Die swell is an expansion of the melt as the pressure is released, and is dependent on polymer chemistry and die design. After curing, the solid, continuous part is drawn onto a take-up roller or cut into transportable lengths, depending on the type of part. This process may vary significantly depending on the type of die and extrusion process. [1]
Global Plastic Production (1950-2022) [2] Plastics production has been growing globally. The numbers include thermoplastics and polyurethanes, as well as thermosets, adhesives, coatings, sealants, and PP-fibers. [1] Data was gathered by PlasticsEurope (PEMRG) and Consultic, or the nova-institute. [3] [4]
[1] Multiple layers are formed by coextrusion, lamination, or various coating technologies. The material of construction of multilayered packaging ranges from paper to plastics to metals. Most multilayered packages are not readily recyclable. [2] Basf company and Uflex recently developed multilayered food packaging from 100% recyclable ...
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In-mould labelling is the use of paper or plastic labels during the manufacturing of containers by blow molding, injection molding, or thermoforming processes. The label serves as the integral part of the final product, which is then delivered as pre-decorated item. [1]
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