We propose a variety of customized products.
“Cell-Cast sheeting method” and “CLAREX Technology Platform” make it possible to propose variety of optically valued products.
CLAREX Cell-Cast Sheeting Method
Introducing the Cell-Cast Sheeting Method and its features.
Advantages and disadvantages comparing to other sheeting method like Extrusion method can also be found.
Features of Optical Grade Cell-Cast Acrylic Sheet
Weight
2,000,000
Transmission
92～94％
Haze : ≤ 0.1%
Surface
Smoothness
0.02μm
0.2mm～90mm
Customization
Hardness
Normal Grade：2H
Hard-Coat Grade：6H
Light
Resistancy
Transmission
No Birefringence
Production Method of PMMA Sheet (Cell-Casting)
The raw material called MMA (Methyl methacrylate) Monomer and the initiator liquid are poured into a pre-polymerization unit.
This pre-polymerized liquid is poured into a cell-mold.
It is polymerized by a heat treatment.
At this heating stage, the liquid becomes a solid acrylic sheet, and this means that the MMA becomes PMMA.
A solid acrylic sheet is separated from the glass mold.
Each sheet is individually inspected foreign matter, surface quality and thickness.
Protective film is applied to both sides to protect surface quality.
The sheet is cut into standard size.
General Comparison of Sheeting Method (Extrusion vs. Cell-Casting Method)
Here explains what is Cell-Casting method and its features, and advantages comparing to Extrusion method.
| Cell-Casting Method | Cast “Liquid MMA” directly into Cell-Mold. (Batch Process) Suitable for High-Mix/Low-Volume Production. |
|---|---|
| Extrusion Method | Put “PMMA Pellet” into the extruder and make it flat sheet. (Continuous Process) Suitable for Low-Mix/High-Volume Production. |
| Cell-Casting Method | Extrusion Method | |
|---|---|---|
| Advantage | No double refraction (No birefringence). Suitable for optical sensor cover filter. High-Mix/Low-Volume. Color match and other customization. Higher molecular weight. Better chemical resistance. | Shorter production lead-time and lower production cost because of continuous process. Easier to control thickness tolerance. Easy to make large size sheet. |
| Disadvantage | Longer production lead-time and higher production cost because of batch process. More difficult to control thickness tolerance. | Double refraction (birefringence) in general. Not flexible in terms of customization. Low-Mix/High-Volume. |
CLAREX Technology Platform
We customize or develop many customer requested products by combining our original Technology Platform described below.
5 basic technologies
