Accession Number:

ADA063540

Title:

Using Graphite Filament Compositions as a Die Material

Descriptive Note:

Final rept. Jun 1975-Mar 1978

Corporate Author:

HERCULES INC RADFORD VA

Personal Author(s):

• Styne, R. J.

Report Date:

1978-10-01

Pagination or Media Count:

85.0

Abstract:

Technological advances in graphite filament-reinforced compounds have provided a material adaptable for use in propellant extrusion operations. Two graphite composite formulations were selected for evaluation. Each contained 30 graphite and 15 Teflon, with the remaining constituent being nylon and polyphenylene sulfide PPS, respectively. Dies were fabricated from the above materials and were compared with Delrin dies, currently used in propellant manufacturing operations, to establish wear and failure characteristics. An additional die fabricated from stainless steel and coated with Teflon was also evaluated. The stainless steel-Teflon coated die and the graphite composite formulation containing PPS were found to be superior to the other dies. An economic evaluation indicated that the graphite die would be more desirable for extended production use.

Descriptors:

• *DIES
• *FIBER REINFORCED COMPOSITES
• COST EFFECTIVENESS
• DELRIN
• EXTRUSION
• FILAMENTS
• GRAPHITE
• NYLON
• PLASTIC COATINGS
• POLYPHENYLENES
• PROPELLANTS
• STAINLESS STEEL
• SULFIDES
• WEAR

Subject Categories:

• Laminates and Composite Materials
• Machinery and Tools

Distribution Statement:

APPROVED FOR PUBLIC RELEASE