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HexPly® M81 is a high performance tough epoxy matrix for use in industrial applications requiring good impact resistance and damage tolerance, such as the automotive industry. HexPly® M81 is based on the highly successful HexPly® 8552 toughened epoxy resin system, used widely around the world for the manufacture of aircraft structures. Non-aerospace customers now have the opportunity to benefit from the excellent performance of this resin system presented with reinforcements specially adapted for industrial markets.

Polymer Name: Epoxy Resins & Compounds

Functions: Prepreg

Technical Data Sheet

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Identification & Functionality

Composite Materials Functions

Features & Benefits

Materials Features
Product Highlights
  • Toughened epoxy matrix with excellent mechanical properties
  • Elevated temperature performance (Tg up to 200°C)
  • Versatile cure cycle (from 135°C to 180°C)
  • Available on various reinforcements
  • Excellent drape and tack

Applications & Uses

Properties

Physical Form
Typical Properties
ValueUnitsTest Method / Conditions
Density1,30g/cm3
Maximum Glass Transition Temperature, Tg onset (Dry)200°C
Maximum Glass Transition Temperature after ageing, Tg onset (Wet)140°C

Storage & Handling

Storage Life
  • Shelf Life: 12 months at -18°C/0°F (maximum, from date of manufacture).
  • The maximum storage life for HexPly® prepreg, when stored continuously, in a sealed moisture-proof bag, at -18°C/0°F or 5°C/41°F. To accurately establish the exact expiry date, consult the box label.
  • Out Life: 14 days at room temperature (25°C max).
  • The maximum accumulated time allowed at room temperature between removal from the freezer and cure.
  • Tack Life: 10 days (depending of the reinforcements) at room temperature (25°C max).|
  • The time, at room temperature, during which prepreg retains enough tack for easy component lay-up.
Storage

HexPly® M81 prepregs should be stored as received in a cool dry place or in a refrigerator. After removal from refrigerator storage, prepreg should be allowed to reach room temperature before opening the polythene bag, thus preventing condensation (a full reel in its packaging can take up to 48 hours).