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    Optical Plastics - Properties and Melt Flow Rate

     

    OPTICAL PLASTICS - Physical and Mechanical Properties

    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)