Initial Gas Amount Dialog

Use this dialog to specify the weight percentage and the foaming gas conversion percentage of the chemical blowing agent.

Prerequisites
Mesh type: Analysis sequence specific
  • 3D
  • Dual Domain
  • Midplane
Molding Process: Thermoplastics Microcellular Injection Molding
Analysis sequence: Dependent on mesh type
Dialog location
Click Process Settings (Home tab > Molding Process Setup panel > Process Settings) and click Advanced options then the Edit icon associated with Process controller. Select the Microcellular Control tab. From the Initial gas amount drop down list select Chemical blowing agent (CBA). Click Edit value.
Dialog element Explanation
Weight % of CBA

The weight of chemical blowing agent in the resin, as a percentage.

Foaming gas conversion % of CBA by weight

The weight of foaming gas generated from the reaction of the chemical blowing agent, as a percentage. 1

Parent topic: Microcellular Injection Molding using a Chemical Blowing Agent
1 For example, for this chemical reaction:

2 NaHCO3 -> CO2 + H2O + Na2CO3,

For each gram of sodium bicarbonate in the resin, 0.262 g of carbon dioxide is generated. Therefore, the Foaming gas conversion % of CBA is 26.2%.