The cover plate is mainly used in the outer layer of the touch screen, and the main raw material of the product is glass or PMMA, which has the functions of anti-impact, scratch resistance, oil resistance, anti-fingerprint, and enhanced light transmittance.
Which is more suitable for touch display panel, glass or PMMA?
1, The surface hardness of PMMA cover lens is usually 3H, glass is 6H, like Corning glass can reach 8H ~ 9H, so PMMA cover lens are more likely to be scratched.
2, The impact resistance of PMMA cover lens than glass several times, almost no risk of fracture, the same height free fall, glass panels are more likely to break.
3, Thermal expansion and contraction is the physical properties of PMMA, toughened glass also has, but much smaller than the PMMA cover lens, it's negligible. So if you use PMMA cover lens, which need to be aware of this problem when mounting the case. In addition, the heat resistance of PMMA cover lens is much lower than cover glass, the general temperature of more than 90 degrees PMMA will produce thermal deformation.
4, PMMA cover lens acid resistance is not as good as cover glass, if the product will often come into contact with rain, it is recommended to use cover glass, better durability.
5, PMMA cover lens is light weight, the same size and thickness, PMMA lighter than glass.
6, PMMA cover lens and cover glass through the rate are quite high, but PMMA is more prone to aging, there will be a sense of haze after a long time.
7, PMMA cover lens in the process is the first batch screen printing, and then CNC processing, and glass must be done in shape before screen printing, which is lower efficiency than PMMA.
9, PMMA cover lens cost is lower than glass, coupled with the low yield of glass in the production process, it is difficult to process, so the cost is also higher than PMMA.
The cover lens of the two materials have their own advantages and disadvantages, chossing which is mainly based on their own use of the environment. If you do not know which one to choose, please kindly contact us, we have a professional engineering team to evaluate for your project, I believe we will give you the most suitable touch display solution.
We support customised plexiglass cover (acrylic cover/PMMA cover), glass cover (high temperature ink glass cover, AG anti-glare glass cover, one-piece black glass cover, explosion-proof glass cover, transmittance-enhancing glass cover, ultra-white glass cover, antimicrobial glass cover, Asahi Glass cover, Corning glass cover, regular glass cover, 2.5D glass cover, 3D glass cover, heat-bending glass cover, special-shaped glass cover, and so on. (cover plate, shaped glass cover plate, ultra-thick glass cover plate, etc.).