Plastics for Injection Molding

In Maspi are used different plastics materials for injection molding depending on the technical characteristics to achieve 

Polypropylene (PP) is one of the most widely used polymers in the world. Developed in the 1960s, it has found wide use in the field of furniture because of its strength, structural and lightweight characteristics. In Maspi it is used for the production of interior and exterior furniture shells and chairs. Its use is often accompanied by additional fillers such as fiberglass or calcium and, if necessary, expanders in order to properly manufacture products without blemishes.

* In photo the difference between virgin polypropylene (left) and recycled polypropylene (right). 


Styrene-acrylonitrile (SAN) is a copolymer of styrene with acrylonitrile. It is a polymer with good strength, high stiffness, and and dodated with excellent scratch resistance. Aesthetically, it appears in a more glossy form than other materials. In Maspi this material is used, combined with ABS, for the hydrosanitary sector to make shower trays of different sizes.


Acrylonitrile-butadiene-styrene (ABS) has a rubber component that provides greater impact resistance. In Maspi it is used together with SAN to create Co-injected shower trays. The ABS inserted into the core of the item gives the product greater strength by making each shower tray more impact resistant. 

*In photo the division into core (ABS) and skin (SAN) of the article obtained by co-injection. 


Polyamide (PA) also known as Nylon is a material that is used in plastic injection molding due to its very high structural properties. Unlike PP in fact, it is used to confer greater strength and structure to the molded item.