This specification covers the basic properties of thermoplastic molding compounds used to mold electric and electronic component parts.

The thermoplastic molding compounds governed by this specification are of the following types, as specified (see 6.2).

      Type                            Description

     PT-F     - Thermoplastic polyester (polytetramethylene terephthalate or poly
                 1, 4 butylene terephthalate) compound, flame resistant.

     GPT-7.5F - Thermoplastic polyester (polytetramethylene terephthalate or poly
                 1, 4 butylene terephthalate) compound, 7.5 percent glass
                 reinforced, flame resistant.

     GPT-15F  - Thermoplastic polyester (polytetramethylene terephthalate or poly
                 1, 4 butylene terephthalate compound, 20 percent glass
                 reinforced, flame resistant.

Beneficial comments (recommendations, additions, deletions) and any pertinent data which may be of use in improving this document should be addressed to: Commander, Naval Sea Systems Command, SEA 55Z3, Department of the Navy, Washington, DC 20362-5101 by using the self-addressed Standardization Document, Improvement Proposal (DD Form 1426) appearing at the end of this document or by letter.

 Types           Description

GPT-20F  - Thermoplastic polyester (polytetramethylene terephthalate or poly
            1, 4 butylene terephthalate compound, 20 percent glass
            reinforced, flame resistant.

GCT-30F  - Thermoplastic polyester (1, 4-cylohexylenedimethylene
            terephthalate -(PCT) compound, 30 percent fiber reinforced, flame
            retardant.

GPT-30F  - Thermoplastic polyester (polytetramethylene terephthalate or poly
            1, 4 butylene terephthalate) compound, 30 percent glass
            reinforced, flame resistant.

GAT-22F  - Thermoplastic, polyarylether compound, 22 percent glass
            reinforced, flame resistant.

GET-30F  - Thermoplastic polyester (polyethylene terephthalate) compound, 30
            percent glass reinforced, flame resistant.

GET-35F  - Thermoplastic polyethylene terephthalate compound, 35 percent
            glass reinforced, flame retardant.

GMT-40F  - Thermoplastic polyester (polytetramethylene terephthalate or poly
            1, 4 butylene terephthalate) compound, 40 percent glass and
            mineral reinforced, flame resistant.

GLT-10F  - Thermoplastic polyetherimide compound, 10 percent glass
            reinforced, flame resistant.

GLT-20F  - Thermoplastic polyetherimide compound, 20 percent glass
            reinforced, flame resistant.

GLT-30F  - Thermoplastic polyetherimide compound, 30 percent glass
            reinforced, flame resistant.

GST-40F  - Thermoplastic polyphenylene sulfide compound, 40 percent glass
            reinforced, flame resistant.

MLT-20F  - Mineral plastic polytherimide compound, 20 percent mineral filled,
            flame resistant.

GLCP-30F - Thermoplastic polyester, 30 percent glass reinforced liquid
            crystalline.

GLCP-50F - Thermoplastic polyester, 50 percent glass reinforced liquid
            crystalline.