Print Logo
Technical Articles


Polypro (Polypropylene) ASTM D4101

Natural Polypropylene — Plast-O-Matic uses homopolymer or copolymer  depending on the application.  Polypropylene is a thermoplastic with low specific gravity and excellent chemical resistance to a wide range of acids, alkalies and organic solvents. It is also used in deionized water distribution. It is not recommended for use with strong oxidizing acids, chlorinated hydrocarbons and aromatics. The polypropylene used by Plast-O-Matic, unless indicated as “GPP” or “Glass-Filled,” is 100% natural, virgin (unprocessed) resin with no pigments or other fillers whatsoever. These high purity properties make Natural Polypro an ideal alternative to PTFE and PVDF in many instances. The maximum service temperature is 180°F (82°C). Although polypropylene has a low melting point, it offers excellent structural rigidity.
Polypropylene is joined by heat fusion, threading or flanging.

Glass-Filled Polypropylene — The addition of glass fibers to Polypropylene provides greater mechanical strength and therefore higher pressure & temperature capabilities. This type of polypropylene generally has a small amount of pigmentation.

Glass-filled polypropylene is joined by heat fusion, threading or flanging.