How do you calculate pultrusion scrap length cost?

Multiply scrap footage by loaded cost per foot and the unrecoverable fraction, then add fixed handling. With 100 ft at $45/ft, an 80% factor, and $250 fixed, total scrap cost is $3,850, or $38.50 per foot.

Why can't pultrusion scrap be recycled like plastic scrap?

Cured thermoset composites are crosslinked and reinforced with glass or carbon, so they can't be melted and re-pulled. Most scrap is landfilled or ground into low-value filler, which is why the unrecoverable fraction runs high.

What is a good scrap rate for pultrusion?

Efficient lines keep scrap under 3-5% of linear footage, with most of it die-change lead-in. Chronic in-run scrap above that usually points to cure, pull-speed, or resin-bath control issues.

How much does a die change cost in scrap?

Depends on lead-in length and profile value. At $38.50 per scrapped foot, even 30 ft of startup waste plus handling runs well over $1,000 per changeover — a strong case for setup improvements.

Should fixed handling cost be included in scrap cost?

Yes. Disposal, labor to clear the die, and bin fees are real. In the example the $250 fixed charge lifts total cost from $3,600 of captured material to $3,850 — about 6.5% you'd miss if you counted only footage.

What does the capture factor represent here?

It's the share of scrap cost you actually lose after any salvage. An 80% factor means 20% is recovered — as regrind filler credit or partial rework — leaving 80% as true loss on the material line.

Pultrusion & Continuous Composite Profiles calculator

Scrap Length Cost Calculator

Scrap length cost puts a dollar figure on the feet of pultruded profile that never ship — startup transients, off-color runs, out-of-tolerance sections, and the lead-in scrap around every die change. Cost engineers and pultrusion plant managers use it to see what continuous scrap really costs once material, labor, and disposal are loaded in, since composite scrap cannot be reground and re-pulled like thermoplastics. A foot of cured FRP scrap is a total loss of resin, glass, and pull time, so quantifying it exposes whether die-change waste or a marginal cure is quietly eating margin. It also justifies investment in faster startups and better cut-off control.

What this calculator does

Scrap length cost puts a dollar figure on the feet of pultruded profile that never ship — startup transients, off-color runs, out-of-tolerance sections, and the lead-in scrap around every die change.
Use it when scrap length cost in pultrusion and continuous composite profiles is being put through a pultrusion and continuous composite profiles weighted-cost review.
It multiplies scrap footage by a loaded cost per foot and an unrecoverable fraction, adds fixed handling cost, and returns total and per-foot scrap cost.

Formula used

Scrap Length Cost cost = quantity × rate × capture factor + fixed cost
Per-unit scrap length cost = total cost ÷ quantity

Inputs explained

Scrap profile length:
Loaded cost per scrap foot:
Unrecoverable-material fraction:
Fixed scrap handling cost:

How to use the result

Use it when tallying the cost of a die change, a bad run, or a chronic startup-scrap problem, and when building a scrap-reduction business case.
It treats cost per foot as uniform; heavy or carbon-loaded profiles cost far more per scrapped foot than light glass rod, so a blended rate can mask where the money is going.

Current U.S. benchmarks

The producer price index for plastic resins and materials stands at 319.371 (BLS, May 2026), up 19.5% from a year earlier. Quotes priced off last quarter's material cost miss this move.

Common questions

How do you calculate pultrusion scrap length cost? Multiply scrap footage by loaded cost per foot and the unrecoverable fraction, then add fixed handling. With 100 ft at $45/ft, an 80% factor, and $250 fixed, total scrap cost is $3,850, or $38.50 per foot.
Why can't pultrusion scrap be recycled like plastic scrap? Cured thermoset composites are crosslinked and reinforced with glass or carbon, so they can't be melted and re-pulled. Most scrap is landfilled or ground into low-value filler, which is why the unrecoverable fraction runs high.
What is a good scrap rate for pultrusion? Efficient lines keep scrap under 3-5% of linear footage, with most of it die-change lead-in. Chronic in-run scrap above that usually points to cure, pull-speed, or resin-bath control issues.
How much does a die change cost in scrap? Depends on lead-in length and profile value. At $38.50 per scrapped foot, even 30 ft of startup waste plus handling runs well over $1,000 per changeover — a strong case for setup improvements.
Should fixed handling cost be included in scrap cost? Yes. Disposal, labor to clear the die, and bin fees are real. In the example the $250 fixed charge lifts total cost from $3,600 of captured material to $3,850 — about 6.5% you'd miss if you counted only footage.

Last reviewed 2026-05-12.