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Ensinger PEI

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CHT ALPA-SIL MF 3 Silicone Molding Rubber
Categories: Polymer; Thermoset; Silicone; Silicone Rubber

Material Notes: Description: This is a pourable 2-part addition cure silicone elastomer system. After mixing parts ‘A’ and ‘B’ in the correct proportions, the system will cure at ambient temperatures within 24 hours, but the rate of cure can be accelerated by heat. The cured rubber exhibits excellent physical and electrical properties.

Key Features

  • Crosslinks at temperatures > 23 °C/77°F even under total exclusion of air and moisture
  • Easy processing
  • Very good mechanical properties, especially resistance to further tearing
  • Crosslinks to a resistant, rubbery-elastic vulcanizate without reaction heat
Application: Application in model making and mould construction as well as for the jewellery industry and for pad printing.

Information provided by CHT Group

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Physical PropertiesOriginal ValueComments
Density 1.10 g/ccA; BS ISO 2781
 1.10 g/ccB; BS ISO 2781
 1.10 g/ccCured Product; BS ISO 2781
Brookfield Viscosity 7000 cPB
 15000 cPMixed
 22500 cPA
Linear Mold Shrinkage <= 0.0010 cm/cm
Storage Temperature <= 30.0 °C
 
Mechanical PropertiesOriginal ValueComments
Hardness, Shore A 28DIN 53 505
Tensile Strength 1088 psiISO 37
Elongation at Break 600 %ISO 37
Tear Strength 115 pliBS ISO 34-1
 
Processing PropertiesOriginal ValueComments
Cure Time 16.0 hourDe-mould Time / Full Cure
Pot Life 60.0 min
Shelf Life 12.0 Month
 
Descriptive Properties
AppearanceTranslucent
ColortranslucentA
 translucentCured Product
Cure typeAddition
Mix Ratio10:1By Weight

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PCHTSIL109 / 314592

Proto3000 – 3D Engineering Solutions

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