3A Composites Airex C70.75 Cross-Linked PVC Sandwich Core vs. Divinycell® H80 Structural PVC Foam
3A Composites Airex C70.75 Cross-Linked PVC Sandwich Core (3A Composites) and Divinycell® H80 Structural PVC Foam (Diab Group) achieve a 92.4% ASTM engineering compatibility score in Structural Sandwich Cores (PVC, SAN, PET Foam & End-Grain Balsa). Tensile strength delta is +0.2 MPa (+8%) and thermal HDT delta is +8 °C, making them qualified for direct drop-in substitution under standard cure schedules.
Side-by-Side ASTM Mechanical, Thermal, Rheological & Pricing Delta
| ASTM Parameter | A: 3A Composites Airex C70.75 Cross-Linked PVC Sandwich Core (3A Composites) | B: Divinycell® H80 Structural PVC Foam (Diab Group) | Engineering Delta (A vs. B) |
|---|---|---|---|
| OEM Manufacturer & SKU | 3A Composites • 3AC-C70-75-20MM | Diab Group • DIAB-H80-34IN-GS | Cross-Brand OEM Equivalent |
| ASTM D638 Tensile Strength (MPa / PSI) | 2.7 MPa (392 psi) | 2.5 MPa (362 psi) | +0.2 MPa (+8 %) |
| ASTM D648 Heat Deflection Temp (HDT °C / °F) | 88 °C (190 °F) | 80 °C (176 °F) | +8 °C (Verify Post-Cure) |
| ASTM D790 Flexural Strength (MPa) | 3.8 MPa | 3.6 MPa | +0.2 MPa (+5.6 %) |
| ASTM D2583 Barcol Hardness | N/A | N/A | N/A |
| ASTM D2196 Brookfield Viscosity @ 25°C | Solid Reinforcement / Core | 5 cPs | Solid State |
| Gel Time @ 25°C (Minutes) | N/A | 35 min | N/A |
| ASTM D792 Specific Density (kg/m³) | 80 kg/m³ | 1120 kg/m³ | -1040 kg/m³ |
| US DOT 49 CFR & TDG Hazmat Class | Non-Regulated Solid Polymer (N/A) | Non-Hazmat Standard Freight (N/A) | Identical (N/A) |
| Unit Price ($/kg USD) & Pack Price | $25.4/kg • $1,219 (Crate of 10 Grooved & Perforated Sheets) | $0.71/kg • $142 (Sheet (48 x 96 in)) | +24.69 $/kg (+3477.5 %) |
| US Stocking Warehouses | DeSoto, TX • Statesville, NC • Tampa, FL | FL • NC • ME • CA | 1–3 Days LTL Dispatch |
Companion process stack: Structural Core-Bonding Putty (0.55 kg/m² kerf fill) + Marine Vinyl Ester or Infusion Epoxy Matrix. Follow CORE BEDDING & RESIN UPTAKE: Grid-scored (GS) or grooved/perforated (GP) sheets require ~0.55 kg/m² extra resin for kerf/groove filling or a dedicated structural core-bonding putty.
Post-Cure Schedule Adjustment Advised: ASTM D648 HDT differs by 8 °C (88 °C vs. 80 °C). For elevated-temperature tooling or dark-colored marine hulls, perform a 4–6 hour post-cure ramp at 60–80 °C (140–176 °F) to lock in full cross-link density.
Identical Hazmat Logistics Profile: Both SKUs ship under US DOT 49 CFR & Transport Canada TDG as Non-Regulated Solid Polymer (UN Number: N/A). Note 49 CFR § 177.848 segregation if ordering with Class 5.2 Organic Peroxides (UN3105).
Engineering FAQ: 3A Composites Airex C70.75 Cross-Linked PVC Sandwich Core vs. Divinycell® H80 Structural PVC Foam
1. Is 3A Composites Airex C70.75 Cross-Linked PVC Sandwich Core a direct drop-in equivalent for Divinycell® H80 Structural PVC Foam?▼
3A Composites Airex C70.75 Cross-Linked PVC Sandwich Core (3A Composites) and Divinycell® H80 Structural PVC Foam (Diab Group) achieve a 92.4% ASTM engineering compatibility score in Structural Sandwich Cores (PVC, SAN, PET Foam & End-Grain Balsa). Tensile strength delta is +0.2 MPa (+8%) and thermal HDT delta is +8 °C, making them qualified for direct drop-in substitution under standard cure schedules.
2. What is the ASTM D638 Tensile Strength and ASTM D648 HDT difference between 3A Composites Airex C70.75 Cross-Linked PVC Sandwich Core and Divinycell® H80 Structural PVC Foam?▼
3A Composites Airex C70.75 Cross-Linked PVC Sandwich Core (3A Composites) delivers ASTM D638 Tensile Strength of 2.7 MPa (392 psi) and ASTM D648 HDT of 88 °C, whereas Divinycell® H80 Structural PVC Foam (Diab Group) delivers 2.5 MPa (362 psi) and HDT of 80 °C. The net delta is +0.2 MPa (+8 %) tensile and +8 °C HDT.
3. Do 3A Composites Airex C70.75 Cross-Linked PVC Sandwich Core and Divinycell® H80 Structural PVC Foam use the same catalyst or hardener cure system?▼
Companion process stack: Structural Core-Bonding Putty (0.55 kg/m² kerf fill) + Marine Vinyl Ester or Infusion Epoxy Matrix. Follow CORE BEDDING & RESIN UPTAKE: Grid-scored (GS) or grooved/perforated (GP) sheets require ~0.55 kg/m² extra resin for kerf/groove filling or a dedicated structural core-bonding putty. Post-Cure Schedule Adjustment Advised: ASTM D648 HDT differs by 8 °C (88 °C vs. 80 °C). For elevated-temperature tooling or dark-colored marine hulls, perform a 4–6 hour post-cure ramp at 60–80 °C (140–176 °F) to lock in full cross-link density.
4. How do US DOT 49 CFR Hazmat shipping rules and B2B drum/pack prices compare between 3A Composites Airex C70.75 Cross-Linked PVC Sandwich Core and Divinycell® H80 Structural PVC Foam?▼
Identical Hazmat Logistics Profile: Both SKUs ship under US DOT 49 CFR & Transport Canada TDG as Non-Regulated Solid Polymer (UN Number: N/A). Note 49 CFR § 177.848 segregation if ordering with Class 5.2 Organic Peroxides (UN3105). In US B2B distribution, 3A Composites Airex C70.75 Cross-Linked PVC Sandwich Core is priced at $1,219 per Crate of 10 Grooved & Perforated Sheets ($25.4/kg) vs. $142 per Sheet (48 x 96 in) ($0.71/kg) for Divinycell® H80 Structural PVC Foam (delta: +24.69 USD/kg).
Related Drop-In Comparisons in Structural Sandwich Cores (PVC, SAN, PET Foam & End-Grain Balsa)
3A Composites Airex C70.75 Cross-Linked PVC Sandwich Core (3A Composites) and Divinycell® H80 Structural PVC Foam (Diab Group) are trademarks of their respective owners. CompositeMatrix Technologies Inc. is an independent North American B2B composite material intelligence registry; comparative ASTM D638, D648, D790, D2583, and D2196 figures are presented under the US legal doctrine of Nominative Fair Use (Lanham Act, 15 U.S.C. § 1125) and Feist Publications, Inc. v. Rural Telephone Service Co. (499 U.S. 340) for scientific and industrial cross-reference. Cure schedules, exotherm behavior, and laminate qualification must be verified by a licensed Naval Architect or Professional Engineer (PE) against current manufacturer batch Technical Data Sheets (TDS) and Safety Data Sheets (SDS).