PMMA, PMMI

PMMA is a mid-priced amorphous plastic with exceptional transparency. It is often called Acrylic.

Why choose it?

  • Glass-like transparency. PMMA is commonly used in different types of lenses.
  • Exceptionally good UV resistance.
  • Scratch resistance due to high surface hardness.

Why not choose it?

  • Poor thermal resistance. PMMP becomes very soft at temperatures as low as 70°C.
  • Fragility. Thin-walled PMMA components are sensitive to impacts.

Typical applications:

  • Boat windows
  • Car lights

PMMI is a very similar material with excellent transparency. The main difference is the improved thermal resistance. PMMI is better than PMMA in, for example, car headlight optics, in which the temperature might rise up to 150°C.

Do you have something to add? Please comment below:

All information on Plasticprop.com is based on the best knowledge and understanding of experienced plastic product designers. Nevertheless, we may be wrong. Do not use this website as your primary or only source of information. Always check and test in practice. Kindly contribute, if you know better. We do not take any responsibility, financial or ethical, for the outcome of your product.