Pultrusion & Continuous Composite Profiles worked example

Resin Gel Time Margin with available resin gel time in the die of 63 units: a worked example

This worked example runs the resin gel time margin numbers for a tougher week than the baseline: available resin gel time in the die of 63 units instead of the typical 125 units. Resin Gel Time Margin is the cushion between how long your resin stays workable in the heated die and how long the process actually needs it to before it gels.

The inputs for this scenario

  • Available resin gel time in the die: 63 units (the input this scenario stresses; the baseline uses 125)
  • Required gel time for full cure: 100 units (held at the documented default)
  • Reference gel time for percent basis: 100 units (held at the documented default)

Working through the calculation

  • The calculation starts from the formula this tool documents: Resin Gel Time Margin margin = available value - required value.
  • Absolute margin works out to -37 hr at these inputs, and this is the headline figure for the scenario.
  • Margin works out to -37 % at these inputs.
  • Available amount works out to 63 value at these inputs.
  • Required amount works out to 100 value at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where available resin gel time in the die sits at 125 units and the headline result is 25 hr, this scenario comes in 248% below the baseline at -37 hr.
  • Use it when tuning catalyst loading, die temperature, or line speed, and you need to know how much processing headroom the resin system leaves. A result at this level usually justifies acting on the stressed input before touching anything else, because every other figure in the table is downstream of it.

Results at a glance

  • Absolute margin: -37 hr (headline result)
  • Margin: -37 %
  • Available amount: 63 value
  • Required amount: 100 value

Run it with your numbers

  • To rerun this with your own numbers, open the live Resin Gel Time Margin calculator, set available resin gel time in the die to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.