DuPont Kevlar 49 Style 285 4HS Crowfoot Ballistic Aramid vs. Owens Corning Knytex DBM 1708 Advantex E-CR Biaxial
DuPont Kevlar 49 Style 285 4HS Crowfoot Ballistic Aramid (DuPont / Hexcel) and Owens Corning Knytex DBM 1708 Advantex E-CR Biaxial (Owens Corning) achieve a 83.8% ASTM engineering compatibility score in E-Glass / E-CR Stitched Multiaxials (1708 / 1808) & Kevlar Hybrids. Tensile strength delta is -1120 MPa (-43.1%) and thermal HDT delta is matched, making them interchangeable with post-cure temperature and viscosity flow adjustments.
Side-by-Side ASTM Mechanical, Thermal, Rheological & Pricing Delta
| ASTM Parameter | A: DuPont Kevlar 49 Style 285 4HS Crowfoot Ballistic Aramid (DuPont / Hexcel) | B: Owens Corning Knytex DBM 1708 Advantex E-CR Biaxial (Owens Corning) | Engineering Delta (A vs. B) |
|---|---|---|---|
| OEM Manufacturer & SKU | DuPont / Hexcel • DUP-KEV49-285 | Owens Corning • OC-DBM1708-50IN | Cross-Brand OEM Equivalent |
| ASTM D638 Tensile Strength (MPa / PSI) | 1480 MPa (214,656 psi) | 2600 MPa (377,099 psi) | -1120 MPa (-43.1 %) |
| ASTM D648 Heat Deflection Temp (HDT °C / °F) | N/A | N/A | Ambient / N/A |
| ASTM D790 Flexural Strength (MPa) | 990 MPa | N/A | N/A |
| ASTM D2583 Barcol Hardness | N/A | N/A | N/A |
| ASTM D2196 Brookfield Viscosity @ 25°C | Solid Reinforcement / Core | Solid Reinforcement / Core | Solid State |
| Gel Time @ 25°C (Minutes) | N/A | N/A | N/A |
| ASTM D792 Specific Density (kg/m³) | 2560 kg/m³ | 2620 kg/m³ | -60 kg/m³ |
| US DOT 49 CFR & TDG Hazmat Class | Non-Regulated Industrial Fiber (N/A) | Non-Regulated (N/A) | Identical (N/A) |
| Unit Price ($/kg USD) & Pack Price | $46/kg • $4,600 (100 kg Roll (50 in)) | $5.4/kg • $315 (65 yd Roll (50" Wide, 125 lbs)) | +40.6 $/kg (+751.9 %) |
| US Stocking Warehouses | Phenix City, AL • Tampa, FL • Minneapolis, MN | Lakeland, FL • St. Petersburg, FL • Minneapolis, MN | 1–3 Days LTL Dispatch |
Companion process stack: Marine Vinyl Ester Resin (~0.68 kg/m² per ply in VIP) + Norox MEKP-925H Catalyst (1.5%). Follow RESIN DEMAND FORMULA: 1708 Biaxial (25.5 oz/yd² total) absorbs ~0.95 kg of Vinyl Ester resin per m² per ply in hand layup, or ~0.68 kg/m² per ply under vacuum infusion.
Direct Drop-In Qualified: Thermal deflection (ASTM D648 HDT) differs by only 0 °C (N/A °C vs. N/A °C). Existing mold cure and demold cycles can be maintained without thermal schedule modification.
Identical Hazmat Logistics Profile: Both SKUs ship under US DOT 49 CFR & Transport Canada TDG as Non-Regulated Industrial Fiber (UN Number: N/A). Note 49 CFR § 177.848 segregation if ordering with Class 5.2 Organic Peroxides (UN3105).
Engineering FAQ: DuPont Kevlar 49 Style 285 4HS Crowfoot Ballistic Aramid vs. Owens Corning Knytex DBM 1708 Advantex E-CR Biaxial
1. Is DuPont Kevlar 49 Style 285 4HS Crowfoot Ballistic Aramid a direct drop-in equivalent for Owens Corning Knytex DBM 1708 Advantex E-CR Biaxial?▼
DuPont Kevlar 49 Style 285 4HS Crowfoot Ballistic Aramid (DuPont / Hexcel) and Owens Corning Knytex DBM 1708 Advantex E-CR Biaxial (Owens Corning) achieve a 83.8% ASTM engineering compatibility score in E-Glass / E-CR Stitched Multiaxials (1708 / 1808) & Kevlar Hybrids. Tensile strength delta is -1120 MPa (-43.1%) and thermal HDT delta is matched, making them interchangeable with post-cure temperature and viscosity flow adjustments.
2. What is the ASTM D638 Tensile Strength and ASTM D648 HDT difference between DuPont Kevlar 49 Style 285 4HS Crowfoot Ballistic Aramid and Owens Corning Knytex DBM 1708 Advantex E-CR Biaxial?▼
DuPont Kevlar 49 Style 285 4HS Crowfoot Ballistic Aramid (DuPont / Hexcel) delivers ASTM D638 Tensile Strength of 1480 MPa (214,656 psi) and ASTM D648 HDT of N/A °C, whereas Owens Corning Knytex DBM 1708 Advantex E-CR Biaxial (Owens Corning) delivers 2600 MPa (377,099 psi) and HDT of N/A °C. The net delta is -1120 MPa (-43.1 %) tensile and N/A HDT.
3. Do DuPont Kevlar 49 Style 285 4HS Crowfoot Ballistic Aramid and Owens Corning Knytex DBM 1708 Advantex E-CR Biaxial use the same catalyst or hardener cure system?▼
Companion process stack: Marine Vinyl Ester Resin (~0.68 kg/m² per ply in VIP) + Norox MEKP-925H Catalyst (1.5%). Follow RESIN DEMAND FORMULA: 1708 Biaxial (25.5 oz/yd² total) absorbs ~0.95 kg of Vinyl Ester resin per m² per ply in hand layup, or ~0.68 kg/m² per ply under vacuum infusion. Direct Drop-In Qualified: Thermal deflection (ASTM D648 HDT) differs by only 0 °C (N/A °C vs. N/A °C). Existing mold cure and demold cycles can be maintained without thermal schedule modification.
4. How do US DOT 49 CFR Hazmat shipping rules and B2B drum/pack prices compare between DuPont Kevlar 49 Style 285 4HS Crowfoot Ballistic Aramid and Owens Corning Knytex DBM 1708 Advantex E-CR Biaxial?▼
Identical Hazmat Logistics Profile: Both SKUs ship under US DOT 49 CFR & Transport Canada TDG as Non-Regulated Industrial Fiber (UN Number: N/A). Note 49 CFR § 177.848 segregation if ordering with Class 5.2 Organic Peroxides (UN3105). In US B2B distribution, DuPont Kevlar 49 Style 285 4HS Crowfoot Ballistic Aramid is priced at $4,600 per 100 kg Roll (50 in) ($46/kg) vs. $315 per 65 yd Roll (50" Wide, 125 lbs) ($5.4/kg) for Owens Corning Knytex DBM 1708 Advantex E-CR Biaxial (delta: +40.6 USD/kg).
Related Drop-In Comparisons in E-Glass / E-CR Stitched Multiaxials (1708 / 1808) & Kevlar Hybrids
DuPont Kevlar 49 Style 285 4HS Crowfoot Ballistic Aramid (DuPont / Hexcel) and Owens Corning Knytex DBM 1708 Advantex E-CR Biaxial (Owens Corning) 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).