Vitro Minerals VitroBloc™ 350 Recycled Glass Powder Antiblock

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Vitro Minerals VitroBloc™ 350 Recycled Glass Powder Antiblock
Categories:	Ceramic; Glass
Material Notes:	VitroBloc™ Glass Powders, VB-350 and VB-500, are high clarity, inorganic antiblock additives made from recycled glass. The feedstocks for VitroBloc™ are pure glass, which is free of crystalline silica or other impurities. VitroBloc™ products are white powders finer than 40 µm top size with a very low level of minus 5 µm fines. The products are designed for excellent blocking and clarity properties utilizing a recycled powder. VB-350 and VB-500 offer two different refractive indices and specific gravities to optimize film properties of clarity, haze, and weight. Information provided by Vitro Minerals.
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Physical Properties	Original Value	Comments

Specific Gravity	2.20 - 2.40 g/cc	ASMT D153
Bulk Density	45.0 lb/ft³	ASTM D25
Brightness	89 - 90 %	Y value
Oil Absorption	22 %	ASTM D281
Fineness	4.0	Hegman; ASTM D-1210-79
Moisture Absorption at Equilibrium	<= 0.30 %	Free; ASMT C566
Particle Size	8.0 - 10 µm	d₅₀ median; Laser interferometer
Particle Mesh Size	325 Mesh	99.9%; ASTM C25
pH	9.9	AFS 113-87-S
Specific Surface Area	2.1 m²/g

Mechanical Properties	Original Value	Comments
Hardness, Mohs	5.5

Electrical Properties	Original Value	Comments
Surface Resistance	3500 ohm	ASTM D2448

Optical Properties	Original Value	Comments
Refractive Index	1.47	ASTM D801

Component Elements Properties	Original Value	Comments
Al2O3	0.30 - 20 %
B2O3	0.20 - 4.0 %
CaO	0.10 - 10 %
Fe2O3	<= 1.0 %
K2O	<= 0.10 %
Loss on Ignition(%)	<= 0.50 %
MgO	>= 4.0 %
Na2O	12 - 14 %
SiO2	60 - 75 %
TiO2	<= 0.10 %

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CVITRO916 / 209590

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