I really like investigating materials, it is hard to believe that Thermoplastics using synthetics and intended for use as metal alternatives are in production for approx’ a Century.
Non synthetic compounds to produce a material like a plastic able to molded by adding heat are near 125 years of production (Prior to the age of Petrochemical residuals being repurposed to produce plastics).
See the following to assist with understanding UHMW against Acetal, which is a much used Thermoplastic i designs for TT.
Many savvy engineers/pioneers in engineering have adopted acetal as their go-to material. Platters are acclaimed for the End Sound that becomes available when Acetal is used. Platter Mats produced from Acetal also has devoted followers.
I myself like the Thermoplastic Torlon to perform a role that UHWM or Acetal could both be selected for as the material.
A 20mm thick Acetal Platter Round is to be mechanically fastened to the Platter belonging to the owned Kaneta design DD TT.
Key Differences at a Glance
Acetal: Often referred to by brand names like Delrin, acetal should be your go-to material if you need parts that require structural integrity and tight tolerances (e.g., gears, manifolds, and intricate mechanical components). It holds its shape well under long-term stress and resists creep, but can be more brittle in high-impact environments.
UHMW: This material acts as the default "workhorse" for bulk material handling. It possesses extreme impact toughness—deforming instead of fracturing under stress—and is highly economical for large sheets or slabs. It is the superior choice if the material is going to be continuously hit, rubbed, or scraped by abrasive materials like rocks, sand, or bulk goods.
Energy Absorption: UHMWPE is well known for its high impact strength and excellent ability to dissipate mechanical energy, making it an excellent choice for noise and vibration damping in industrial machinery.
