Regrind Blend Calculator

Calculate virgin and regrind mass for a planned blend percentage. Use this as a documented planning estimate, then validate it against the actual machine, mold, resin, and process.

Formula and method

Regrind mass = total blend mass x regrind percentage.

Use the exact grade, moisture condition, and an approved regrind limit from the supplier/specification.

Inputs and units

Use controlled records, CAD, measured production data, the exact resin data sheet, or machine-maker specifications. Keep the material and time basis with the result.

Worked example

500 kg at 20% regrind = 100 kg regrind and 400 kg virgin.

What the result supports

This result is a first-pass screen for materials planning. Use it to identify the next record or engineering check, not as a release decision.

Sanity check

Check the unit basis and whether all quantities describe the same cavity, shot, machine, or production window before comparing values.

Important limitation

Never infer an allowable percentage from this arithmetic.

Reference: BASF Ultradur processing notes.

Next calculation

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FAQ

What must be checked after using regrind blend calculator?

Retain the input source and compare this estimate with the applicable machine, mold, supplier, or production record before relying on it.