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Engineering plastics [1] are a group of plastic materials that have better mechanical or thermal properties than the more widely used commodity plastics ...
Röchling SE & Co. KG is a plastics engineering company headquartered in Mannheim, Baden-Württemberg, Germany. [2] The company has three divisions: Industrial, Automotive and Medical. Currently Röchling employs 11,988 people in 90 locations across 25 countries (North- and South America, Europe and Asia), [ 3 ] with annual sales of €2.723 ...
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LDPE has SPI resin ID code 4 Schematic of LDPE branching structure. Low-density polyethylene (LDPE) is a thermoplastic made from the monomer ethylene.It was the first grade of polyethylene, produced in 1933 by John C. Swallow and M.W Perrin who were working for Imperial Chemical Industries (ICI) using a high pressure process via free radical polymerization. [1]
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HDPE is known for its high strength-to-density ratio. [4] The density of HDPE ranges from 930 to 970 kg/m 3. [5] Although the density of HDPE is only marginally higher than that of low-density polyethylene, HDPE has little branching, giving it stronger intermolecular forces and tensile strength (38 MPa versus 21 MPa) than LDPE. [6]
High-performance plastics are thus about 3 to 20 times as expensive as engineering plastics. [2] In the future, a significant price decline cannot be expected, since the investment costs for production equipment, the time-consuming development, and the high distribution costs are going to remain constant. [5]