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Transparent ABS is ABS whose rigid matrix carries methyl methacrylate, which brings the matrix’s refractive index to that of the rubber particles so light passes through without scattering. Regular ABS keeps the two phases mismatched, so its rubber particles scatter…
PBT is an engineering polyester that is stiffer, stronger and more resistant to fuels and oils than polypropylene, while polypropylene is the lighter and cheaper material and the better one for alkalis, hot water and living hinges. PBT is the…
A homopolymer is made from a single monomer and a copolymer from two or more, and in commercial resins the second monomer is a minor addition made to correct a specific weakness of the homopolymer. In both polypropylene and acetal…
High impact PP is polypropylene toughened by a rubber phase: particles of ethylene-propylene rubber dispersed through a polypropylene matrix, either formed in the polymerisation reactor or blended in afterwards. The rubber particles make it much tougher than homopolymer, in the…
ABS plastic is acrylonitrile butadiene styrene, an amorphous thermoplastic in which a rigid styrene–acrylonitrile copolymer is toughened with polybutadiene rubber. It is chosen for its combination of stiffness, impact strength and surface finish. It is a high-volume engineering plastic, a…
Polypropylene’s common uses are packaging, household goods, car parts, building products, electrical parts, pipes and tanks, fibers and nonwoven fabrics, and medical and lab products. It covers that many uses because it is light, resists water and most chemicals, and…
MFI and MFR are the same measurement under two names: melt flow index and melt flow rate both report how much molten thermoplastic a standard die extrudes in 10 minutes at a set temperature and load. Melt flow rate is…
Bio-polypropylene is made in three steps: a renewable feedstock such as sugar crops, wood residues or used cooking oil is converted into propylene by one of several routes, and that bio-propylene is polymerized in ordinary PP plants the same way…
A general-purpose injection-molding ABS has a tensile strength of about 45 MPa (6,500 psi), reported as tensile stress at yield at 23 °C. Across unfilled grades, producer datasheets run from 38 MPa for a very-high-impact grade to 47 MPa. Every…
Polyethylene resin is polyethylene in the form it is bought and sold: a synthetic thermoplastic made by polymerising ethylene and supplied as pellets for converters to extrude or mould into products. It comes in three commodity types, LDPE, LLDPE and…