P  R  O  D  U  C  T  S  ,    I  N  C

Phenolic

Phenolic resins offer cost effective molding while delivering outstanding heat, flame, steam, UV radiation, moisture and chemical resistance. Phenolics have a reputation for long term dimensional stability, surface hardness, rigidity and minimal creep, making them the ideal choice for applications requiring high ratings for electrical arc and isolation, superior strength at elevated temperatures and surface abrasion resistance.

injection moldingMOLDING
Injection molding is the most common method used to process and it yields the lowest piece price for extended runs. Compression molding is also used to process Phenolics. Compression molding is most commonly used for applications requiring metal inserts. Transfer molding is also widely practiced.

 

 

CHEMICAL RESISTANCE
Phenolics are resistant to common organic solvents (aromatic or aliphatic, polar or nonpolar, aqueous solutions of salt and halogenated organics such as carbon tetrachloride and trichloroethane (common cleaning solvents). Phenolics are also highly resistance to automotive fluids such as brake fluid, antifreeze, glycol/petro-chemicals/hydrocarbons - including methanol and some acids and bases.

CHEMICAL RESISTANCE
6 week immersion at 72°F
(23°C) · (% weight gain / surface appearance after exposure)
PHENOLIC COMPOUND
Sulfuric Acid 35%
2.2 moderate attack
Nitric Acid 10%
-0.9 moderate attack
Hydrochloric Acid 10%
-2.4 moderate attack
Sodium Hydroxide 10%
1.8 strong attack
Toluene
0.1 no change
Acetone
0.1 no change
Trichloroethylene
0.2 no change



THERMAL PERFORMANCE
Phenolics excel in retention of mechanical properties up to 400°F (200°C) and glass transition temperatures of over 572°F (300°C) with proper post curing. Phenolics have a high arc resistance and UL V-O recognition. Many grades also have a high self-ignition temperature (about 1112°F/600°C), a high limiting oxygen index (40-49% 02), low smoke emission and low coefficient of linear thermal expansion.

PHYSICAL & MECHANICAL PROPERTIES
Phenolics offer excellent dimensional stability under thermal cycling and high stress conditions, as well as, low water absorption and high surface harness. Phenolics are available in high impact grades with notched Izod impact strengths to 20 ft.-lb./in. (1067J/m), high compressive strength and low creep under bolt loads, fatigue resistance at elevated temperatures and thermal expansion coefficients similar to metals.

RETENTION AND CREEP RESISTANCE
(All materials are glass- reinforced with comparable percentages of glass)
MATERIAL
PHENOLIC
EPOXY
PPS
Compressive Strength @ 73°F, kpsi
Compressive Strength @ 250°F, kpsi
42
34
30
20
31
13
Flex Strength @73°F kpsi
Flex Modulus @73°F, Mpsi
31
2.6
29
2.7
33
1.7
% Flex Strength Retention @ 300°F
% Flex Modulus Retention @ 300 °F
75
92
54
49
39
18

MECHANICAL
GLASS FILLED PHENOLIC
Impact Strength, ft.lbs/in. notch, side
0.60
Flexural Modulus, psi
2.0 x 106
Tensile Strength, psi
10,000

FORMALATING
There are over 100 commercially available formulations of Phenolic. For assistance in choosing the right one for your application, please contact Parkway Products, Inc.

PROCESSING
Phenolic molding compounds are offered as granules, powders or pellets for injection, compression or transfer molding. Parkway Products, Inc. is an expert in molding Phenolics and can assist with design, molding, machining and assembly.

In all new applications Parkway Products, Inc. should be contacted to assist with the selection of the most appropriate material and in the design of parts and tooling.

APPLICATIONS
· Brake Pistons
· Water Pumps
· Power Steering Bushings
· Coil Bobbins
· Motor End Plates
· Oil Filter Adapters
· Cookware Handles
· Electrical Thermal Strips
· Gas Meter Parts