{
  "type": "product",
  "id": "hexcel-hexply-m21",
  "url": "https://www.nomyparts.com/companies/hexcel/products/hexply-m21/",
  "name": "HexPly M21",
  "fullName": "HexPly M21 toughened epoxy prepreg matrix",
  "manufacturer": {
    "id": "hexcel",
    "name": "Hexcel",
    "url": "https://www.nomyparts.com/companies/hexcel/"
  },
  "category": {
    "id": "structures",
    "name": "Structures"
  },
  "subcategory": {
    "id": "composite-materials",
    "name": "Composite materials"
  },
  "description": "HexPly M21 is a toughened epoxy prepreg matrix for primary aerospace structures. It is supplied with carbon or glass reinforcement and uses a 180 °C cure, with press or autoclave processing selected to develop the required cured-laminate performance.",
  "manufacturerPage": "https://www.hexcel.com/wp-content/uploads/2025/12/HexPly_M21_global_DataSheet.pdf",
  "certifications": [],
  "specifications": [
    {
      "id": "grade",
      "name": "Grade",
      "sources": [],
      "verified": null,
      "value": "Aerospace-grade"
    },
    {
      "id": "market",
      "name": "Market",
      "sources": [],
      "verified": null,
      "value": "Dual-use"
    },
    {
      "id": "platform-class",
      "name": "Platform class",
      "sources": [],
      "verified": null,
      "value": [
        "Large UAS (25–150 kg)",
        "Heavy UAS (>150 kg)",
        "eVTOL",
        "Manned aircraft"
      ]
    },
    {
      "id": "airframe",
      "name": "Airframe",
      "sources": [],
      "verified": null,
      "value": [
        "Fixed-wing",
        "Helicopter",
        "Hybrid VTOL",
        "Tiltrotor/tiltwing"
      ]
    },
    {
      "id": "availability",
      "name": "Availability",
      "sources": [],
      "verified": null,
      "value": "In production"
    },
    {
      "id": "material-form",
      "name": "Material form",
      "sources": [
        "https://www.hexcel.com/wp-content/uploads/2025/12/HexPly_M21_global_DataSheet.pdf"
      ],
      "verified": "2026-10-19",
      "value": "Prepreg"
    },
    {
      "id": "cure-temperature",
      "name": "Cure temperature",
      "sources": [
        "https://www.hexcel.com/wp-content/uploads/2025/12/HexPly_M21_global_DataSheet.pdf"
      ],
      "verified": "2026-10-19",
      "value": 180,
      "unit": "°C"
    },
    {
      "id": "resin-system",
      "name": "Resin system",
      "sources": [
        "https://www.hexcel.com/wp-content/uploads/2025/12/HexPly_M21_global_DataSheet.pdf"
      ],
      "verified": "2026-10-19",
      "value": "Toughened epoxy resin system."
    }
  ],
  "sources": [
    {
      "url": "https://www.hexcel.com/wp-content/uploads/2025/12/HexPly_M21_global_DataSheet.pdf",
      "checked": "2026-10-25"
    }
  ],
  "updated": "2026-11-04",
  "license": "https://creativecommons.org/licenses/by/4.0/",
  "licenseName": "CC BY 4.0",
  "attribution": "Source: NomyParts, https://www.nomyparts.com/companies/hexcel/products/hexply-m21/"
}