Acoustic · WS-ACS-02 · v1.4.3
Acoustic Panel – STC 60
Higher-density acoustic stack for ACS-PNL-60 wall assemblies. Denser formulation and thicker panel deliver STC 60 with reasonable weight.
Approved
Batch size
500 g
Nominal
Total mass
608.0 g
Incl. finishing
Parts
3
A · B · C
Ingredients
10
Across all parts
Cost / batch
$2.23
All parts
Cost / kg
$3.67
Finished material
Measured performance
Aggregated across attached testsCompression
38.6 MPa
Water absorption
3.4%
UV (0–10)
6.2/10
Density
520 kg/m³
Ingredients
Organized by mixing part · mass% = share of total recipeA
Part A · Base matrix
6 ingredients · 535.0 g · $2.09
| Ingredient | Material | Amount | Mass % | Purpose | Cost |
|---|---|---|---|---|---|
Sawdust | Sawdust | 240 g | 39.5% | Structural filler — bulk biomass | $0.120 |
Polyurethane emulsion (48% solids) | Additive | 80 g | 13.2% | Elastomeric binder for damping | $0.440 |
Kraft Lignin | Lignin | 40 g | 6.6% | Binder and matrix stabilizer | $0.080 |
CaCO₃ (Calcium Carbonate) | Additive | 45 g | 7.4% | Stiffener and filler | $0.014 |
CNF (Cellulose Nanofibers) | NC | 30 g | 4.9% | Reinforcement and cohesion | $1.44 |
Water | — | 100 g | 16.4% | Hydration and flow medium | $0.000 |
B
Part B · Cure activator
1 ingredient · 12.0 g · $0.030
| Ingredient | Material | Amount | Mass % | Purpose | Cost |
|---|---|---|---|---|---|
Hydrogen Peroxide (H₂O₂, 3%) | Additive | 12 g | 2.0% | Curing agent (via Fenton reaction) | $0.030 |
C
Part C · Rheology & plasticizer
3 ingredients · 61.0 g · $0.110
| Ingredient | Material | Amount | Mass % | Purpose | Cost |
|---|---|---|---|---|---|
Xanthan Gum | Additive | 6 g | 1.0% | Viscosity booster (thickener) | $0.072 |
Warm Water | — | 40 g | 6.6% | Disperses xanthan evenly | $0.000 |
Glycerin | Additive | 15 g | 2.5% | Co-plasticizer, flow modifier | $0.038 |
Mixing instructions
4 steps · total hands-on time 52 h 26 min- 1Part A mix10 min
As ACS-01 but with added kraft lignin for density.
- 2CNF + whip6 min
CNF disperse, then light whip (400 rpm) — fewer / smaller cells than STC-40.
- 3Combine A + C10 min
Mix 10 min.
- 4Cast + cure52 h85 °C
Cast into double-layer mold. Cure 48h ambient, then 85°C for 4h.
Cost contribution by ingredient
Ranked high to low1.
CNF (Cellulose Nanofibers)
$1.44
64.5%
2.
Polyurethane emulsion (48% solids)
$0.440
19.7%
3.
Sawdust
$0.120
5.4%
4.
Kraft Lignin
$0.080
3.6%
5.
Xanthan Gum
$0.072
3.2%
6.
Glycerin
$0.038
1.7%
7.
Hydrogen Peroxide (H₂O₂, 3%)
$0.030
1.3%
8.
CaCO₃ (Calcium Carbonate)
$0.014
0.6%
9.
Water
$0.000
0.0%
10.
Warm Water
$0.000
0.0%
Batch economics
Total cost / batch$2.23
Finished mass608.0 g
Cost per kg$3.67
Priciest inputCNF (Cellulose Nanofibers)
Share of total from top 390%
Safety
- See ACS-01.
Batches mixed from this recipe
All batches →No batches yet. Mix the first one from the Batches page.
Attached tests
All tests →T-8817STC rating60pass