Knowde Enhanced TDS
Identification & Functionality
- Chemical Family
- Polymer Name
- Composite Materials Functions
- Technologies
Features & Benefits
- Product Highlights
- High melt viscosity giving easy processing characteristics
- Tolerant to a wide variation of processing conditions
- Latitude for low to high pressure laminating or molding processes
- Medium tack level giving excellent drape characteristics
- Good shelf life
HexPly® 914 is easily processed by press or autoclave for optimum composite properties and is also suitable for vacuum-bag cure of high quality thin components.
Applications & Uses
Properties
- Physical Form
- Cured Properties
| Value | Units | Test Method / Conditions | |
| Tensile strength at 175°C | 47.7 | Mpa | ISO R527 type 1 |
| Tensile Modulus at 175°C | 3.9 | GPa | ISO R527 type 1 |
| Tensile Strain at 175°C | 1.5 | % | ISO R527 type 1 |
| Poisson’s ratio at 175°C | 0.41 | — | ISO R527 type 1 |
| Calculated shear Modulus at 175°C | 1.4 | GPa | ISO R527 type 1 |
| Compression strength at 175°C | 180 | Mpa | ISO 604 |
| Toughness K1C at 175°C | 0.7 | Mpa | — |
| Toughness G1C at 175°C | 103 | J/m2 | — |
| Glass transition temperature (Tg) at 175°C | 190 | °C | DMTA |
| Cured Density at 175°C | 1.29 | g/cm3 | — |
Technical Details & Test Data
- Curing Conditions
- 1 hour at 175°C and 700kN/m2 (7 bar) pressure plus 4 hours postcure at 190°C.
- Heat up rate 2°C to 5°C.
Components up to 2 mm thick can be cured without a dwell in the cure schedule, provided a maximum heat up rate of 2°C/minute is used. For thicker components a dwell temperature between 120-135°C is recommended to avoid the possibility of an exotherm in the matrix. (Thicker components need longer dwells at the lower temperature).
Storage & Handling
- Storage
- Tack Life @ 23°C 60 days
- Guaranteed Shelf Life @ -18°C 19 months (maximum from date of manufacture)
Storage conditions.
HexPly® 914 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).