Silicone rubber for general purpose

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Silicone rubber for general purpose
Posting date : Nov 29, 2010
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40-
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1, Silicone rubber for computer keyboard 1) Basic model: LSR2009-40A/B, LSR2010-40A/B,LSR2000-40A/B 2) Product Description  This series are 2-part translucent liquid silicone rubber suitable for injection molding processes,catalyzed by platinum(LSR2009-40A/B is fast cured type). 3)Key Features Good rebound property Excellent thermal and cold stability(-60℃~250℃) Good fluidity,easy to be injected Stable shrinkage rate High tear strength 4) Application   The series are suitable for making lining of computer keyboard 5) Storage:   Correctly stored in its original closed container at room temperature (max 27℃). SQUARE® LSR20**-40A/B has a shelf life of 180 days. The ready to use LSR20**-40A/B should be kept tightly closed, if it doesn’t , it will affect the shelf life. 6)How to use   Ready-to-use mixtures(components 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,the mixed silicone rubber will be vulcanized in a few seconds. 7) Packaging The product is available in 20kgs pails or 200kgs drums 8) Typical Properties Components Part A Part B Appearance ivory-white transparent ivory-white translucent Viscosity mPa.s 75000 60000 The safe operating period is 3days under airproof condition and 20℃, after mixing component A and B. The safe operating period will be shorter when the temperature is higher. The silicone rubber properties are as the flowing ,after mixing parts A and B at the mixing ratio 1:1, then moulding under 150℃X10 minutes Properties Test method Unit Value LSR2010-40A/B Value LSR2009-40A/B Density DIN53 479A G/cm3 108 108 Shore A hardness DIN53 305 °A 43 43 Tensile strength DIN53 504 S2 N/mm2 5.0 5.0 6) Remarks:These figures are for reference only, Please contact us for detail

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