Made from polyurethane (PU), the monomers are easy molding. Having high light transmittance, high Abbe number, good shock resistance, lenses are applicable to rimless eyeglasses.

 

Monomer Properties 

Polyurethane (PU) 

A

Appearance Colorless transparent liquid 

Viscosity (CPS/25℃ ) 10 ± 3  

Density (g/cm3) 1.14

Refractive Index  (nE25) 1.483 ± 0.003

Color (APHA ) ≤ 10

Polyurethane (PU) 

B

Appearance Colorless to yellowish liquid 

Viscosity (CPS/25℃ ) 51 ± 5

Density (g/cm3) 1.28

Refractive Index  (nE25)1.5825 ± 0.003

Color (APHA ) ≤ 30

 

Lens Properties 

Refractive Index (nE25) 1.597

Abbe Number (vE20) 42.0

Density  (g/cm3, 25 ℃) 1.31

Volume Shrinkage (%) 10.6

Transparency (%)≥ 92

Glass Transition Temp.  (℃)97

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