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Silicone Rubber Part Design Manual
Table of Contents
Introduction to Silicone Rubber
Silicone Rubber for Medical Device Applications
Silicone Defined
History of Silicones in Medical Devices
Types and Properties of Moldable Silicone Rubber
Chemical Structure and Resistance
Electrical
Flammability
Fungus Resistance
Food Contact Status and FDA Regulations
Mechanical
  1. Compression Set Resistance
  2. Resistance and Damping Factor
  3. Hardness Range from 0000 shore a to 70 shore D
  4. Tensile Strength
  5. Elongation
  6. Bulk Modulus
  7. Flex Life
  8. Tear Strength
  9. Coefficient of Friction
  10. Ozone and Oxidation Resistance
  11. Permeability (Gas and Liquid)
  12. Bondability
  13. Radiation Resistance
  14. Temperature Resistance
  15. Weather Resistance
  16. Bio-Testing
Factors in Selecting Medical Silicones
Custom Silicones
Oil Bleeding Grades of Silicones
  1. Crosslinking Density
  2. Storage Time
  3. Temperature
Medical Sterilization of Silicone Parts
Procesing
Molding
  1. Silicone Lost (Disposable) Core
Hardness Testing of Plastics - Shore Durometer
Part Design
Wall Thickness
Tolerances and Molded Part Shrinkage
Tolerances
Shrinkage
Coefficient of Thermal Expansion
Thermal and Electrical Conductivity
Optical Properties
Radii and Fillets
Surface Finish
Draft Angles
Undercuts
Parting Lines and Gate Location
Over-Molding
Heat Aging Effects on Silicone's Mechanical Properties
  1. Effects on Tensile Strength
  2. Effects on Elongation
  3. Effects on Hardness
Medical Marking
Laser Marking
Inks
Specifying Liquid Silicone Medical Rubber Parts
Examples of Silicone Products
Delta® Valves
Silicone for Prosthetics
Silicone Rubber Suppliers, Molders, Manufacturers and Testers
Liquid Silicone Rubber Suppliers
Medical Silicone Molders
Silicone Equipment Manufacturers
Silicone Medical Product Testers
Additional Sources for Information on Silicone Rubber
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