A-A-56023B
requirements of the uncured insulating compounds are shown in table I. The physical and
electrical requirements of the cured insulating compounds are shown in table II. Conditioning
TABLE I. Physical requirements, uncured insulating compounds.
Requirement
Conditioning
Requirement values
procedure 1
Type I
Type II
Type III
Type IV
(see table III)
Uncatalyzed, viscosity, average,
A
200/500
200/600
300/900
80/250
minimum/maximum, poises
Catalyzed, pot life, minimum,
A
0.5
0.5
0.5
0.5
hours
1
Conditioning procedure A: As received, no special conditioning. Conditioning procedure E: Temperature
conditioned (see table II, footnotes 1, 2 and 3).
TABLE II. Physical and electrical requirements, cured insulating compounds.
Conditioning procedures 1 2 3
Requirement
Requirement
(see table III)
values,
all types
Hardness shore A, average,
A
35/70
minimum/maximum
E-70/232 °C + E-1/-24 °C
35/70
E-1/-54 °C + E-1/24 °C
35/70
Tensile strength, average, minimum,
A
300
pounds force per square inch (lbf/in 2)
E-70/232 °C + E-1/24 °C
150
E-1/-54 °C + E-1/24 °C
300
Tear strength, average, minimum, pounds
A
15
force per inch of thickness (lbf/in)
Elongation, average, minimum, percent
A
100
E-70/232 °C
75
E-1/-54 °C
100
Dielectric strength, average, minimum,
A
350
volts per mil, approx. 75 mil sheet
1
Proceed with conditioning procedures after curing insulating compounds for not less than 72 hours at 24 °C ±3 °C.
2
Conditioning procedure A: As received, no special conditioning.
3
Conditioning procedure E: Temperature conditioned; encoding definition is a capital letter indicating type of
conditioning, a number indicating the duration of the conditioning in hours, and a number indicating the temperature
in degrees C. A sequence of conditions is denoted by a "+" sign between conditions, see ASTM D618, "Standard
Practice for Conditioning Plastics for Testing".
2
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