APCM DA 4518

APCM DA 4518 is an epoxy prepreg designed for a temperature range of -67°F (-55°C) to 350°F (177°C), with a cure of 250°F (121°C) for one hour and or a cure of 350º F (177ºC) for 1 hour. This material needs to be post cure or cured to 350ºF to get the 350º properties.

Polymer Name: Epoxy Resins & Compounds

Functions: Prepreg

Processing Methods: Prepreg Processing, Vacuum Bagging

End Uses: Tanks

Technical Data Sheet

Knowde Enhanced TDS

Identification & Functionality

Composite Materials Functions

Applications & Uses

Composites End Use
Composites Processing Methods
Applications
  • Remove material from cold storage at least 20 hours prior to use to allow for stabilization at room temperature. Keep the material wrapped to prevent moisture from condensing on the adhesive. If details are cut and replaced into cold storage, shorter stabilization times may be used. Cut the material to size, remove the release paper and apply to part or mold. Remove the separator paper and join the parts together. Parts are now ready to be bonded and may be cured in a press, autoclave, or vacuum bag in an oven. Apply at least 30 psi pressure.

Properties

Physical Properties
ValueUnitsTest Method / Conditions
Volatilesmax. 1%
SeparatorRelease paper and poly film
TackMedium
FormModified epoxy impregnated fabric
Resin Content45 to 50% by Weight
Gel Time (250°F)10Minutes
Mechanical Properties
ValueUnitsTest Method / Conditions
Tensile Strength at 75°F (24°C)72000psi
Tensile Strength at 180°F (82°C)69000psi
Tensile Modulus at 75°F (24°C)4.3 X 106psi
Tensile Modulus at 180°F (82°C)4.5 X 106psi
Flexural Strength at 75°F (24°C)114000psi
Flexural Strength at 350°F (177°C)42000psi
Flexural Strength after 24 hours at 350°F (177°C)42000psi
Flexural Modulus at 75°F (24°C)4.6 X 106psi
Flexural Modulus at 180°F (82°C)4.6 X 106psi
Flexural Strength at 180°F (82°C)110000psi

Technical Details & Test Data

Cure Cycle

DA 4518 is designed to cure in one hour at 250°F (121°C), however this system may be cured at 250°F for one hour and a post cure of 350°F for one hour. This system may also be cure at 350°F for one hour the reason for the higher temperature is to have the higher operating temperature. The prepreg may be cured using either standard heat-up methods or by in-hot, outhot press applications. A pressure of 30 psi is recommended, however pressures of 10 to 50 psi may be used.

Storage & Handling

Shelf Life
6 Months (40°F), 1 Year (0°F), 30 Days (75°F)
Storage

Store material in a contaminate free container and store at O degrees F for extended storage. For shorter storage time requirements store at 40 degrees F, this enables quicker stabilization times.