Robert McKeown Company, Inc.
Robert McKeown Company, Inc.
111 Chambers Brook Road
Branchburg NJ 08876
Toll Free: 1.800.631.1125
Phone: 908.218.9000
Fax: 908.218.8949
Email: sales@robertmckeown.com
Website: www.robertmckeown.com
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CF silicone solid rubber reinforced with fiberglass is a dimensionally-stable, durable material for press pads, belting and gasketing. It is available in six constructions.
CF3320, available in three thicknesses, was developed to meet AMS 3320. Consequently, 3320 has lubricating oil resistance and excellent compression set resistance.
CF4032 and CF4050 are thin, flexible and abrasion-resistant for generalpurpose use.
CF4420 is specially formulated for thermal stability and long life under extreme heat and pressure for extended dwell times. It resists reversion (i.e. softening and outgassing) longer than general purpose silicone. Throughout its useful life, 4420 has thermal stability for consistent thermal conductivity.
CF4444 has a specially formulated rubber compound to give better reversion resistance. The reinforcement is a special crush-resistant fiberglass, making the product excellent for press pads in high-temperature and pressure lamination applications.
CF4451 is a fiberglass fabric coated with static dissipating silicone rubber having a surface resistivity of 1 x 105Ohms – cm.Virtually eliminates static electric discharges which cause operator discomfort and can potentially damage electrical laminates.
CF4480 utilizes our most reversionresistant silicone rubber compound. The product is designed for use in applications involving the tough combination of prolonged high-pressure confinement at temperatures in the range of 375 °F to 650 °F.
Reiforced Solid Rubber
Unit of Measure
Items Reiforced Solid Rubber
4032-1/32
Reiforced Solid Rubber Tape 		Reiforced Solid Rubber
4050-.050
Reiforced Solid Rubber Tape 		Reiforced Solid Rubber
3320-1/16
Reiforced Solid Rubber Tape 		Reiforced Solid Rubber
3320-3/32
Reiforced Solid Rubber Tape 		Reiforced Solid Rubber
3320-1/8
Reiforced Solid Rubber Tape
Test Method Water Absorption N/A
Dielectric Strength N/A 500 V/mil
Thermal Conductivity (Average from 75 to 350 ºF) N/A 1.9 BTU in/h·ft2 ºF
Elongation at Break N/A Less than 10 %
Linear Thermal Expansion N/A 1.5 x 10-4 in/in/ºF (silicone rubber) 4.7 x 10-6 in/in/ºF (fiberglass)
Width N/A 36 in
Color N/A Gray N/A Gray N/A Red N/A Red N/A Red
Test Method Thickness N/A D751
Thickness N/A 1/32 ±.005 in N/A .050 ±.005 in N/A 1/16 ±.005 in N/A 3/32 ±.010 in N/A 1/8 ±.010 in
Fiberglass Thickness N/A .014 in
Test Method Weight N/A D751
Weight per Square Yard N/A 35 lb N/A 57 lb N/A 65 lb N/A 94 lb N/A 124 lb
Fiberglass (% of Weight) N/A 37 % N/A 23 % N/A 20 % N/A 14 % N/A 10 %
Test Method Weight Loss N/A D751
Weight Loss (4 h at 400 ºF) N/A 1.0 % N/A 1.5 % N/A 1.5 % N/A 1.5 % N/A 1.5 %
Test Method Break Strength N/A D751
Break Strength (Warp) N/A 300 ppi
Test Method Diaphragm Burst Strength N/A D751
Diaphragm Burst Strength N/A 750 psi
Durometer (Shore A ±5)1 N/A 81 N/A 75 N/A 74 N/A 66 N/A 65
  • 1 Actual rubber durometer is 50 for 4032; 60 for 3320, 4420, 4444; 65 for 4451; 70 for 4480.