Nonwoven Costing

Nonwoven Cost Estimation: Building a Quote That Survives an Audit

Where nonwoven cost per kilogram actually comes from and how to build a quote that holds up, with realistic rates, scrap math, and the estimating traps.

Fiber and polymer typically account for 50 to 70 percent of nonwoven cost per kilogram, which means a quote lives or dies on material assumptions before machine rates even enter the sheet. The rest splits roughly into machine time and energy at 15 to 25 percent, labor at 5 to 10 percent, and scrap plus packaging plus overhead making up the balance. Customers buy in $/kg, $/1,000 m2, or $/roll, so lock the unit basis first: a 17 gsm spunbond at $2.10/kg is $35.70 per 1,000 m2, and quoting the wrong basis is the fastest way to lose 15 points of margin.

Start with delivered fiber price. Polypropylene resin runs roughly $1.10 to $1.40/kg, polyester staple $0.95 to $1.30/kg, and viscose $1.90 to $2.60/kg depending on region and volume, with high melt flow meltblown grades carrying a 10 to 15 percent premium over standard PP. The Fiber Usage Cost calculator converts a blend recipe into a weighted cost: a 70/30 PET and viscose blend at $1.10 and $2.20 costs $1.43/kg blended. Then divide by yield. At 92 percent formation yield, the fiber cost inside each saleable kilogram rises to $1.55, and quoting the blended number instead is an 8 percent giveaway.

Machine cost is the loaded line rate divided by good output. A spunbond line carrying depreciation on $40 to $60 million of capital plus maintenance runs $700 to $1,200 per hour; a needlepunch line runs $250 to $450. Use the Line Throughput calculator to establish realistic kg/h at the quoted basis weight, then divide. At $900/h and 1,800 kg/h, conversion cost is $0.50/kg; the same $900 line making a light 12 gsm product at 950 kg/h costs $0.95/kg. Meltblown is the extreme case: a $400/h line producing 90 kg/h carries $4.44/kg in machine time alone.

Scrap carries full conversion value, not just fiber value, because every rejected kilogram already consumed machine time and energy. The Roll Scrap Cost calculator prices trim, transition, and reject scrap at loaded cost. A line with 4 percent edge trim plus a grade change every 8 hours that wastes 15 minutes at 250 m/min throws away roughly 3,750 linear meters per transition. If loaded cost is $2.00/kg and recovered regrind offsets only $0.40/kg, a plant running 6 percent total scrap on 12,000 t/year is burning about $1.15 million annually. Quote scrap by product family; light meltblown grades scrap at twice the rate of commodity spunbond.

Energy varies more by process than estimators expect. Needlepunch consumes roughly 0.3 to 0.6 kWh/kg, spunbond 1.0 to 1.5, spunlace 1.5 to 2.5, and meltblown 2.5 to 4.0 because of hot air volumes. At $0.09/kWh, that puts meltblown energy at $0.23 to $0.36/kg, a line item bigger than labor. Use the Bonding Energy calculator with measured oven or calender power rather than nameplate figures, and quote energy as a separate escalator when contracts run past 12 months. Plants that folded energy into a flat overhead rate in 2021 ate 30 to 40 percent utility inflation with no pass through.

Converting and packaging are quoted per roll, not per kilogram, so small slit widths quietly destroy margin. The Slitting Capacity calculator shows why: converting a 3,200 mm parent into 160 mm rolls produces 19 sellable rolls plus edge waste, and every roll needs a core at $0.60 to $1.50, film wrap, a label, and 30 to 60 seconds of handling. One operator at $28/h loaded tending a rewinder that turns 25 rolls per hour adds $1.12 per roll. Add pallets, stretch wrap, and freight, which on low density nonwovens is cube limited rather than weight limited and often adds 5 to 12 percent to delivered cost.

Build the quote bottom up and show your assumptions. Line items: fiber at yield adjusted cost, machine time at demonstrated rate and speed, energy, a scrap allowance by product family, converting per roll, packaging, freight, then overhead at 8 to 15 percent and margin at 10 to 25 percent depending on volume commitment. Attach the resin index and date to the fiber line, and add a reopener clause at plus or minus 5 percent index movement. A quote that survives an audit lists throughput in kg/h and yield in percent, because those two numbers are where buyers attack first.

The classic estimating failures are predictable. Assuming nameplate speed instead of demonstrated speed overstates capacity 15 to 25 percent. Assuming 98 percent yield when line history shows 91 misprices fiber by 7 points. Forgetting that a 140 mm slit width strands 200 mm of a 3,200 mm deckle adds 6 percent hidden waste. Quoting from last quarter's resin price on a 12 month contract hands the customer your margin the next time PP moves $0.15/kg. Pull three months of actual line data before every major quote, and reconcile quoted versus actual cost on your top ten SKUs every quarter.

Published 2026-07-02.