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Optical Plastics - Properties and Melt Flow Rate
Polymer Materials – Optical Properties and Melt Flow Rate
*Material type: OKP is Polyester, LEV1700KL is Polycarbonate, U-100 and T-200 are Polyarylate (Ultem-like)
**Birefringence OGC Method: Measurement instrument KOBRA-CCD, Lens diameter 4.68mm, Thickness of center 0.65mm (at meniscus)
| Material* | OKP1 (Polyester) |
OKP4 (Polyester) |
OKP4HT (Polyester) |
OKPV1 (Polyester) |
OKPA2 (Polyester) |
LEV1700KL (PC) |
U-100 (Ultem-like) |
T-200 (Ultem-like) |
|---|---|---|---|---|---|---|---|---|
| Refractive Index @ 589nm |
1.642 | 1.607 | 1.632 | 1.637 | 1.661 | 1.585 | 1.61 | 1.58 |
| Abbe Number |
22.3 | 26.8 | 23.1 | 22.8 | 20.4 | 34 | 19 | 26 |
| %-T Transmittance in Visible Spectrum (Thickness) |
90 (1mm) |
90 (1mm) |
90 (1mm) |
90 (1mm) |
90 (1mm) |
90 (50mm) |
87 (2mm) |
87 (3mm) |
| Birefringence** OGC Method nm, 10-4 |
<5 | <5 | 55 | 34 | 9 | - | - | - |
| MFR (g/10min) | 5 (230 °C/2.16Kg) |
12 (230 °C/2.16Kg) |
2 (230 °C/2.16Kg) |
3 (230 °C/2.16Kg) |
2 (230 °C/2.16Kg) |
37 (300 °C/1.2Kg) |
4.9 (360 °C/1.2Kg) |
2.7 (380 °C/2.16Kg) |