Tempered Glass VS PMMA

Recently, we are receiving quite a lot of inquiries regarding whether to replace their old acrylic protector with a tempered glass protector.

Let’s state what is tempered glass and PMMA firstly as a brief classification: 

What is tempered glass?

Tempered glass is a type of safety glass processed by controlled thermal or chemical treatments to increase its strength compared with normal glass. 

Tempering puts the outer surfaces into compression and the interior into tension.

It shatters into small granular chunks instead of jagged shards as ordinary annealed glass does with no injury to humans. 

It mainly applies in 3C electronic products, buildings, vehicles, and many other areas. 

broken glass

What is PMMA?

Polymethyl methacrylate (PMMA), a synthetic resin produced from the polymerization of methyl methacrylate. 

A transparent and rigid plastic, PMMA is often used as a substitute for glass in products such as shatterproof windows, skylights, illuminated signs, and aircraft canopies. 

It is sold under the trademarks Plexiglas, Lucite, and Perspex.

 PMMA Scratch mark

They are mainly differing in the below aspects:

Differences 1.1mm Tempered Glass 1mm PMMA
Moh’s Hardness ≥7H Standard 2H, after strengthened ≥4H
Transmittance 87~90% ≥91%
Durability Without aging & color fake off after years Easy get aging & yellowish  
Heat Resistant Can bear 280°C high temperature without broken PMMA start to soften when 80°C 
Touch Function Can realize touch & protective function Only have a protective function

The above is clearly shows the advantage of using a glass protector better than a PMMA protector, hope it will help to make the decision soon.  


Post time: Jun-12-2021

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