Injection Molding
This process consists of melting the material, together with colorants or additives, and then forcing it under pressure into a mold. This mold is cooled, the material solidifies and the final article is extracted.
This method is used to make many types of articles, such as bottles, lids, plastic furniture, appliance bodies, household appliances and automotive parts. Polypropylene is appreciated for its easy processing and excellent final properties, which include low density, high gloss and stiffness, thermal and chemical resistance, among others.
Extrusion Molding
This process can be used to produce a wide range of continuous articles, including tubes, sheets, fibers, etc.
Polypropylene sheets are made by passing the molten material through a flat die and then cooling it in parallel cylinders. The sheets can be used for the production of various articles through cutting and bending, or thermoformed for the production of pots, cups, etc.
The fibers are produced by cutting and then stretching a sheet, which are then used in looms for the production of fabrics, bags, etc.