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Fishpaper – Vulcanized Fiber Sheet

Western Rubber & Supply, Inc. Fishpaper.

Also browse our selection of WesTherm Films, which are ideal for placement between heat generating components and heat sinks or heat spreaders, among other applications.

 

Fishpaper – Vulcanized Fiber, also known as Fish Paper or Leatheroid, is a flexible and extremely durable paperboard material used mainly for electrical insulation due to its excellent dielectric and electrical properties. Vulcanized fiber is a tough, laminated plastic made of cellulose that is available in different grades. Fishpaper is the most common grade, and it is also referred to as Standard Electrical Grade Vulcanized Fiber. Fishpaper is made in thinner gauges than vulcanized fiber, and it also has good forming and punching capabilities. WRS can die cut and machine Fishpaper to your exact requirements. Most Fishpaper supplied by WRS is produced under the Peerless trade name, which is a registered trade name of NVF.

Applications

  • Electrical insulation
  • Slot wedge insulation

Features and Benefits

  • Tough and durable
  • Excellent dielectric and electrical properties
  • Flexible
  • Good forming and punching capabilities

Availability

  • Sheets
  • Custom parts
  • Standard color: Grey
  • Thicknesses: .0078″ to .062″

Method of Application

  • WRS can laminate adhesive to film
  • WRS can kiss cut film to a liner
PROPERTY THICKNESS
(inches)
UNITSCOMMERCIAL ELECTRICAL
Density0.062"grams/cc1.201.20
Specific Volume.062"cu. in./lb23.023.0
Mechanical
Tensile Strength
MD
CD

.062"
.062"

psi
psi

16,000
9,000

18,000
10,000
Modulus of Elasticity in Tension
MD
CD


.062"
.062"


psi x 105
psi x 105


12.0
8.0


12.0
8.0
Flexural Strength
MD
CD

.062"
.062"

psi
psi

15,000
13,000

15,000
13,000
Compressive Strength.062"psi35,00035,000
Impact Strength, Izod Edgewise
MD
CD


.062"
.062"


ft-lbs/in. notch
ft-lbs/in. notch


2.0
1.8


2.5
2.0
Hardness, Rockwell R Scale.062"Divisions8070
Bond Strength, ASTM D-952.062"psi900900
Bursting Strength, Mullen.016"psi-325
Tear Strength, Elmedorf
MD
CD


.016"
.016"


grams
grams


-
-


550
700
Electrical
Dielectric Strength, Short Time0.16"
.062"
.125"
volts/mil
volts/mil
volts/mil
230
200
195
300
215
200
Arc Resistance, ASTM D-495.062"volts/mil
80125
Physical
Thermal Conductivity, 149ºCBtu/hr/ft2/ºF/ft.0.1680.168
Specific HeatBtu/lb/ºF0.4030.403
Heat Resistance, ContinuousºF230 - 240 230 - 240
Thermal Expansion x 10-5
MD
CD


in/in/ºF
in/in/ºF


1.1
1.7


1.1
1.7
Dimensional Change per % change in Moisture Content
Thick.
MD
CD



%
%
%



1.0
0.1
0.25



1.0
0.1
0.25
Water Absorption, 24 hours.062"%66.063.0
Coefficient of Friction, Fibre on Fibre0.160.16
Coefficient of Friction, Fibre on Smooth Cast Iron0.210.21
Flammability, ASTM D-635.062"in/mm0.50.5

Data Sheet Available (Download PDF)

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