Silicone rubber for goggles

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Silicone rubber for goggles
Posting date : Nov 29, 2010
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40-
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4,Silicone rubber for goggles 1) Basic model:LIM39XXAG/BG 2) Product Description SQUARE® LIM39XXAG/BG is high transparence,high strength and high tear strength 2-part liquid silicone rubber,suitable for injection molding processes,catalyzed by platinum 3) Key Features High transparence High tear strength(≥35N/mm) Good rebound property Excellent thermal and cold stability(-60℃~250℃) Low yellowing Outstanding resistance to ageing Meet US FDA CFR 21.Part.177.2600 and EN14350.2 and 4.9 of volatile compound testing standard and Europe RoHS stardard. The safe operating period is 5days under airproof condition and 20℃,after mixing component A and B. The safe operating period will decrease with the increasing of the temperature. 4) Applications Goggles and other products contacted with food 5) Storage: Correctly stored in its original closed container at room temperature (max 27℃). SQUARE® LIM39XXAG/BG has a shelf life of 360 days. The ready to use LIM39XXAG/BG should be kept tightly closed, if it doesn’t , it will affect the shelf life. 6) How to use: Ready-to-use mixtures(component A and B)are fed directly to injection molding machine from the original containers by means of a metering end mixing unit (called static mixer. The mixture(at the mixing ratio 1:1) is injected into the heated mould at the mould temperature of 160-200℃,the mixed silicone rubber will be vulcanized in a few seconds. 7) Packaging SQUARE® LIM39XXAG/BG is available in 20kgs pails or 200kgs drums. 8)Typical properties Property Test method Unit LIM3920 LIM3930 LIM3940 LIM3950 LIM3960 LIM3970 Appearance Transparent ,noimpurity Transparent Transparent Transparent Transparent Transparent Viscosity [mPa.s] 700,000 400,000 600,000 700,000 700,000 800,000 Density DIN53 479A g/cm3 1.08 1.07 1.08 1.10 1.12 1.14 Shore A hardness DIN53 305 ºA 20 30 40 50 60 70 Tensile strength DIN53 504 S2 n/mm2 7.0 8.0 7.5 8.5 7.0 7.0 Tear strength ASTM D624 Die B KN/m 15 25 30 32 35 28 Elongation at break DIN53504 S2 % 880 400 450 500 400 320 Compression set DIN53 517 22hrs at 175℃ % 24 25 25 25 25 25 Linear shrinkage rate JISK 6301 % 2.4 2.5 2.0 2.0 2.0 2.4

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