food grade non smell silicone arch support


Introduction of Shoe Insole making medical silicone 
Our RTV silicone rubber for insoles, is normally of translucent color and in a viscous liquid state.It is composed of 2 parts(A:Silicone rubber, B:Curing agent), which are mixed in a proper ratio and react to turn solid during some curing time.It embraces 2 categories, namely condensation cured type and addition cured type.In order to cater to different applications and customers, we have various items with different hardness depending on customers' requirements.Our products are applicable to multiple fields and purposes, including candle casting, resin casting, polyurethane casting, gypsum product reproduction, life casting, metal casting, concrete casting,etc



Features of Shoe Insole making medical silicone 
Almost nil shrinkage
1)high chemical resistance to aggressive components of some types of resins
2)good tear strength (this feature ensures higher resistance to wearing and shearing)
3)high degree of precision in reproduction
4)high dimensional stability over time and non-deformability
5)high resistance to high temperature and aging(resist -60 to 200 centigrade)
6)excellent non-stick effect
7)food grade silicone (environmental,odorless and nontoxic)



OPERATION PROCEDURES of Shoe Insole making medical silicone 

1.Stir the liquid silicone (Part A and part B) well before use (except when depending on machine).

2.Weigh the desired amount of part A into a clean mixing container,and then weigh the proper amount of part B into the container.Mix the two component together by stirring with a stick.Scrape the container walls and bottom well to insure a thorough mix.

3.Though it is often unnecessary to deair the material due to its low viscosity and our special formulation, it is better to do so to obtain a bubble free rubber.If so, place the container into a vacuum chamber and evacuate the entrapped air from the mixture using a vacuum pump capable of achieving 29 inches of mercury vacuum.The mixture will rise,crest and then collapse in the container.Interruption (bumping) of the vacuum may be necessary to prevent overflowing the container.Keep the mixture under full vacuum for 2-3 minutes.

4.Bleed air slowly into the vacuum chamber.When the chamber is at atmospheric equilibrium,remove the cover plate and take out the container.

5.Pour the deaired material slowly in a steady stream from one end of the mould so that the material flows evenly over the pattern.This should minimize entrapment of air bubbles under the flowing material.A "ready" mold may be poured firstly over the pattern,which will also help reduce the possibility of entrapping air on the pattern and in the cured rubber.A mold release agent may be applied on the pattern first to improve release.

6.Allow the rubber to cure for 2 hours at 24C before removing the cured rubber mold from the pattern.Heat acceleration is recommended if necessary.

Free sample is available for your test.