Acetal

Transparent white, black

• Good electrical properties (400-465 v/mil)
• High mechanical properties & rigidity
• Fatigue, moisture, gasoline & solvent resistant
• Cannot resist: steam, hot water or strong bases
• Good cold flow resistance

Fibre

Provided in any of the following colors: Red, Gray, Black

• Extensively used for electrical insulation applications where little moisture is present (150-250 v/mil)
• Fair mechanical properties
• Can be formed
• Good cold flow resistance
• Non-magnetic & corrosion resistant
• Good thermal conductivity (.25 BTU/hr/ft²/°F/ft)

Fiberglass

Fiberglass

• Laminate of layers of fiberglass mesh with different impregnated resins for different based properties

G–7, Silicone resin

• Best heat resistance

G–9, Heat resistant Melamine resin

• Best mechanical properties of non-metallics
• Good electrical insulator particularly under wet conditions (350 v/mil)
• Good dimensional stability
• Good thermal conductivity for a non-metallic (.29 BTU/hr/ft²/°F/ft)

G–10, Epoxy resin

• Good dimensional stability
• High mechanical strength at room temperature
• Good electrical insulator even in humid conditions (400 v/mil)

G–11, Heat resistant epoxy resin

• Same properties as G-10 at room temperature
• Retains 50% of room temperature standard flexural strength when measured at 150°C after 1 hour at 150°C

Kapton®

Red-brown to yellow-orange

• DuPont® trade name for polyimide plastic film
• Excellent electrical properties (i.e. 7000 v/mil)
• Tensile strength—good(25,000 psi)
• Ability to tolerate fairly high temperature (750°F)
• Flexible—will not chip, flake or disintigrate under compression loads or in vibratory situations as does Mics
• Indicator applications

Mica

Clear to light brown

• Excellent electrical properties (3,000-6,000 v/mil)
• High heat resistance—1050°F
• Insulating material
• It can chip, flake & disintigrate under compression loads & vibratory situations
• Does not lend itself to automated production methods

Mylar®

• Extremely good electrical properties (4,000 v/mil)
• Insulating material
• Maximum thickness—0.014
• Less expensive alternate to Kapton for lower temperature applications (300°F)

Neoprene

Black synthetic rubber, 60 shore hardness

• Resilient—tear resistant
• Cushioning properties—gaskets
• Aircraft applications grade
• Good oil resistance
• Excellent abrasion & flame resistance
• Excellent sealing capabilities

Nylatron®

Charcoal gray

• Polymer Corp. trade name for molybdenum disulfide filled nylon
• Electrical properties lessened slightly by the molybdenum disulfide (356 v.mil)
• Increased resistance to cold flow and greater bearing qualities as compared to nylon

Nylon

Opaque white, blue, black

• Good electrical grade material (385 v/mil)
• Good bearing properties
• Good anti-frictional properties
• High strength for a non-metallic
• Self-extinguishing—flammability reading of 94V2
• Fair cold flow properties

PCTFE

Transparent

• Electrical grade plastic
• Good insulator
• Expensive
• Due to small sheet size, does not lend itself to automated production methods

Phenolics

XXXP

• Paper based with phenolformaldehyde resin impregnated
• Best moisture resistance for phenolics (0.8%)
• Low dielectric losses under severe humidity conditions
• Good electrical properties (325 v/mil)
• Less expensive than LE & CE, although more difficult to fabricate

LE

• Fine weave cotton cloth impregnated with phenolformaldehyde resin
• Good electrical properties (225 v/mil)
• Good moisture resistance (1.3%)
• Better machining properties & appearance than CE
• Easiest phenolic to fabricate
• Not good for primary insulation
• Good mechanical properties

CE

• Coarser weave cottom cloth impregnated with phenolformaldehyde resin
• Best mechanical properties of phenolics
• Good moisture resistance (1.6%)
• Good electrical properties (225 v/mil)
• Not good for primary insulation

Nylon, brown

• Nylon fabric impregnated with phenolformaldehyde resin
• All purpose electrical grade
• Good for operating temp. below 160°F

Polyethylene

Translucent white

• Common plastic—quite inexpensive
• Good electric insulator (460 v/mil)
• Good sealing capabilities
• Low water absorption rate (0.015%)

Polyurethane

• Stable in harsh environments
• Hard as a bowling ball or as soft as a marshmallow
• Resistant to abrasion
• High load-bearing capacity
• Highly resistant to impact
• Ideal for high flex applications
• A wide resilience range
• Available in high and low friction formulations
• Bonds to metal, wood and most plastics

PTFE

Provided in any of the following colors: White

• Excellent anti-frictional properties
• Good electrical properties (480 v/mil)
• Excellent chemical & corrosion resistance
• High heat resistance (500°F)
• Fair cold flow properties
• Very lw water absorption rate (0.005%)
• Excellent for low temperature applications