חומרים על בסיס זכוכית

NEMA Grade            Type                     Specifications

G3                               GPG                     MIL-I-24768/14

G7                               GSG                     MIL-I-24768/17

G9                               GME                     MIL-I-24768/1

G10 / FR4                     GEE-F                  MIL-I-24768/27

G11                             GEB                      MIL-I-24768/3

 GRADE G10 FR4 — GLASS EPOXY
A continuous woven glass fabric laminated with an epoxy resin. This grade is extremely high in mechanical strength, has low water absorption and dissipation factors and has superior electrical characteristics, which are exhibited over a wide range of temperatures and humidities. 
APPLICATIONS: Grade G-10 is used for terminal boards, washers, sleeves, structural components, and parts where the strength to size ratio is critical.
Specification: MIL-I-24768/27, Type GEE-F

GRADE G-11 — HIGH TEMP GLASS EPOXY
A grade similar in composition and properties to Grade G-10 but more suitable for continuous use at elevated temperature. G-11 retains at least 50% of its structural strength at continuous operating temperatures in excess of 300°F
(Due to its high cost, G-11 applications are limited to only the most critical high heat situations.)
Specification: MIL-I-24768/3, Type GEB

GRADE G-7 — GLASS SILICONE
A continuous glass fabric laminated with a silicone resin.
APPLICATIONS:  Grade G-7 is unequalled for high heat and arc resistance applications, and where good mechanical and electrical properties must be exhibited in humid conditions in excess of 400°F.
Specification: MIL-I-24768/17, Type GSG

GRADE G-9 — GLASS MELAMINEA continuous woven glass fabric laminated with a melamine resin. Grade G-9 has good mechanical properties plus high resistance to flame, heat, arcing, and most strong alkali solutions. It is recommended for use where good mechanical properties are needed under wet conditions.
APPLICATIONS: Grade G-9 is used for switchboard panels, arc barriers, structural electrical parts, specialty terminal blocks and circuit breaker components.
Specification: MIL-I-24768/1, Type GME

GRADE GP0-3 — GLASS POLYESTER
Produced from randomly oriented glass fibers in a polyester resin base.
APPLICATIONS: Grade GPO-3 is used in electrical transformer boxes and other heavy duty insulation applications.
 Specification: NEMA GPO-3