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Light transmission of 92 %, clearer than glass
Light transmission of 92 %, clearer than glass
Excellent UV stability with no yellowing outdoors
Excellent UV stability with no yellowing outdoors
Scratch resistant compared to polycarbonate
Scratch resistant compared to polycarbonate
Machines, polishes and flame polishes to optical clarity
Machines, polishes and flame polishes to optical clarity
Available in cast, extruded and coloured sheet
Available in cast, extruded and coloured sheet
Suitable
Suitable for light guides and edge-lit displays
材料
| Cast PMMA sheet |
| Extruded acrylic sheet |
| Coloured and tinted PMMA |
| Light guide grade PMMA |
| Impact modified acrylic |
| PMMA rod and tube |
关键规格
| 项目 | 参数 |
|---|---|
| Light transmission | 92 % |
| Tensile strength | 70 MPa |
| Impact strength | Notched Izod 20 J/m |
| Heat deflection | 95 °C at 1.82 MPa |
| Density | 1.18 g/cm³ |
| Scratch resistance | Good |
表面处理与后加工
Flame polishing to optical clarity
Flame polishing to optical clarity
Vapour polishing
Vapour polishing
Hard coating
Hard coating
Edge lit preparation
Edge lit preparation
常见问题解答
PMMA or PC for a clear guard?
PMMA resists scratching better and stays clearer for longer, while PC absorbs impact. For safety critical guards choose PC; for display and lens parts choose PMMA.
How do you achieve optical clarity?
By diamond machining followed by flame or vapour polishing, which removes tool marks. For light guides we also polish the edges that couple to the LED.
Does acrylic crack around holes?
It can, because it is brittle and sensitive to stress concentrations. We use slow feed rates, generous radii and anneal parts to prevent crazing around holes and slots.
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