Blow molding description

The final product may take any one of a vast multitude of final forms. These include, but are not limited to, construction materials, toys, automotive parts, kitchen aids, industrial parts, sports and recreational equipment, containers of all sizes and description, and an unlimited variety of packaging products for foods, drugs, cosmetics, and other consumer products. The processes that are used to produce or mold or fabricate the final products are also varied and depend on the design and purpose of the product. Some of these processes include extrusion, compression molding, roto-molding, blow molding, sheeting, and films. 

A technical description of the blow molding of an object would involve both heat transfer and rheology. In this case, the rheology is especially complicated because it involves the movement of the polymer in relation to its exiting the die, to the force of gravity, and to the pressure exerted in the polymer by the gas when the polymer is formed in the mold. 

For a description of melt fracture and the high-rate blow-molding process, see Schaul, J. S., M. J. Hannon, and K. F. Wissbrun, Trans. Soc. RheoL, 19, 351 (1975). 

Pellethane thermoplastic polyurethane elastomers range from hard to soft and can be fabricated by a variety of methods, from injection molding to extrusion and blow molding. These elastomers offer a combination of properties rarely seen in an engineering thermoplastic. Table 16 gives descriptions and applications of Pellethane TPE-U products. 

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