Page 186 - DJJ 40173 compile notes - E-BOOK NEW EDIT WITH INDEX_Neat

▪ PP (Polypropylene) is a semi-rigid and lightweight material that is commonly used

in storage and packaging applications.

Polypropylene is great for high-cycle, low strength applications due to its fatigue

resistance, semi-flexible, and lightweight characteristics.

▪ PE/HDPE (High-Density Polyethylene) : Food Containers and Lids, medical objects,

objects that float, watertight, lightweight yet strong, FDA approved and

recyclable

▪ PEEK (polyether ether ketone) is a colorless, organic thermoplastic polymer that

achieves some of the best results out of all thermoplastics worldwide. High

durability and high impact strength. Very high heat resistance It is part of
the polyaryletherketone (PAEK) family.

Used in industries as medical, oil and gas industry, aerospace and automotive

▪ PMMA (polymethyl methacrylate) good thermal properties, including high

dimensional stability. Dimensional stability is maintained at temperatures of up to

about 90 degrees Celsius or down to -40 degrees Celsius. The finished material has

an impact resistance that is up to 17 times higher than that of conventional glass.

This makes the material suitable for demanding work. It also has high hardness and

rigidity. Beside it has high impact resistance, long durability, low flexibility and light

diffusion.