Let's Talk: PMMA (Polymethyl Methacrylate)

Posted by APC Packaging

PMMA, being the first transparent thermoplastic material, contributed to the use of plastic materials as a substitute for optically transparent glass applications.

PMMA is considered a quasi-commodity thermoplastic because it is slightly more expensive than typical commodity thermoplastics such as PE, PP, PVC, and PS. This is due to the combination of its physical and mechanical properties such as clarity, weatherability, and average to high strength. This material also has high dimensional stability, allowing it to be molded in either thin wall or thick wall applications.

These properties make PMMA an optimal choice for the cosmetic packaging industry. This material is a naturally amorphous thermoplastic material, and has a refractive index of 1.49, which is comparable to glass which has a refractive index of 1.60. PMMA has theoretically the maximum obtainable light transmission of plastic materials at 92-93%. It also has excellent UV light resistance and weatherability, making it a suitable material choice for applications where extended outdoor use is likely.

Although PMMA has good chemical resistance for an amorphous material, it is however susceptible to strong acids, alcohols, and ethers, so be sure to consult with our experts with regards to the contents of your bulk when considering to use PMMA as the intended material selection for the product.

Topics: Materials, Plastic, PMMA

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