Glass Laminate

GENERAL DESCRIPTION

Phenolic Laminates are made by applying heat and pressure to layers of
paper, canvas, linen or glass cloth impregnated with synthetic thermosetting
resins. When heat and pressure are applied to the layers, a chemical
reaction (polymerization) transforms the separate layers into a single
laminated material with a "set" shape that cannot be softened again --
therefore, these materials are called "Thermosets". A variety of resin
types and cloth materials can be used to manufacture thermoset laminates
with a range of mechanical, thermal, and electrical properties.

GENERAL PROPERTIES

Physical strength, resiliency, ease and versatility of fabrication, and
excellent electrical properties make Phenolic Laminates useful as support
components in a wide range of mechanical and electrical applications.
Phenolic Laminates are strong, stiff, and have high impact and compressive
strengths. And, they do not soften upon re-heating, so they are easy to saw,
drill, tap, and machine with ordinary tools. "FR" grades are flame retardant.

Glass-based grades have the highest dimensional stability and mechanical
strength, as well as low moisture absorption. However, they are not as easily
machined as paper or cotton fabric laminates.

GLASS-BASED PHENOLIC GRADES

G-3 (Glass Cloth / Phenolic Resin)
This material is made from woven glass cloth and high-temperature phenolic resin. It has excellent flexural, compressive and impact strengths and is capable of continuous operation over 350°F (175°C). NOTE: G-3 is not a common material...call for more information about availability.

G-5 and G-9 (Glass Cloth / Melamine Resin)
These materials are very hard, flame resistant, and have excellent
electrical properties. G-5 and G-9 have high arc and heat resistance.
G-9 is recommended for humid environments. They are used for
switch board panels, arc barriers, circuit breaker parts, and structural
electrical parts Melamine phenolics are available in sheet, rod, and
tube forms.

G-7 (Glass Cloth / Silicon Resin)
This glass-silicon laminate has good electrical properties under
humid conditions, excellent heat and arc resistance, and is
self-extinguishing. G-7 is used for electrical grade insulation, and
for heating & appliance insulation.

G-10 and G-11 (Glass Cloth / Epoxy Resin)

These glass-epoxy laminates are specified for their extremely high
strength and high dimensional stability over temperature. G-10 and G-11
are used for terminal boards, high humidity applications, electrical and
electronic test equipment and electric rotor insulation. G-10 and G-11
are difficult to cut or machine and may require special equipment. G-10 is
slightly stronger while G-11 is a better insulator and can take higher
temperatures. FR-4 is a fire-retardant G-10 glass-epoxy laminate that
is used primarily in the printed circuit board industry.