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PHENOLICS (High Pressure Laminate)
Phenolics
are also known as MicartaŽ, TexoliteŽ and BakeliteŽ. Phenolic (High Pressure
Laminate) is a hard, dense material made by applying heat and pressure
to a series of layered materials, such as paper or fabric and then impregnated
with a synthetic resin. The layered material usually consists of cellulose
paper, cotton fabric, synthetic yarn fabrics, glass fabrics or unwoven
fabrics. Once the layers are heated and pressure is applied the layers
are transformed into a high pressure thermosetting industrial plastic.
These materials are extremely versatile because of their unusual combination of properties. All grades are light in weight (about 1/2 the weight of aluminum), dense, structurally strong, resistant to moisture, and none will soften appreciably under the reapplication of heat. No one grade can possess all the properties desirable for all applications, therefore we stock a number of grades so that the proper material may be selected for almost any application.
Product Applications
|
|
Typical Properties
|
PROPERTY
TESTED
|
ASTM
|
UNITS
|
XX
|
LE
|
L
|
C
|
CE
|
G7
|
G11
|
G10
|
|
PHYSICAL
|
.
|
.
|
.
|
.
|
.
|
.
|
.
|
.
|
.
|
.
|
| Tensile Strength |
D229
|
kpsi
|
14
|
14
|
12
|
11
|
13
|
20.5
|
45
|
50
|
| Compressive Strength |
D229
|
kpsi
|
30
|
38
|
38
|
40
|
39
|
41
|
80
|
50
|
| Flexural Strength |
D229
|
kpsi
|
17
|
22
|
20
|
19
|
22
|
25
|
75
|
60
|
| Bonding Strength |
D229
|
lbs
|
900
|
1800
|
1900
|
2200
|
1900
|
900
|
200
|
2600
|
| Impact Strength, Izod |
D732
|
ft•lb/in
|
0.6
|
1.5
|
1.7
|
2.5
|
2.0
|
11
|
13.0
|
10.0
|
| Hardness, Rockwell |
D732
|
M
|
100
|
100
|
105
|
100
|
105
|
105
|
115
|
115
|
| Water Absorption |
D229
|
%
|
0.6
|
0.7
|
1.1
|
1.5
|
1.1
|
0.03
|
0.04
|
0.05
|
| Micarta Grades |
.
|
.
|
219
|
221
|
238
|
262
|
286
|
H17825
|
H23842
|
H22033
|
| Max. Cont. Operating Temp. |
.
|
oF
|
284
|
253
|
253
|
253
|
253
|
428
|
339
|
284
|
|
ELECTRICAL
|
.
|
.
|
.
|
.
|
.
|
.
|
.
|
.
|
.
|
.
|
| Dielectric Strength |
D229
|
vpm
|
500
|
350
|
350
|
150
|
200
|
350
|
.
|
550
|
| Dielectric Constant |
D229
|
.
|
5.4
|
5.1
|
.
|
.
|
.
|
4.2
|
5.2
|
5.0
|
Phenolic Comparisons
|
GRADES
& NEMA
GOV SPECS |
DESCRIPTION
|
PHYSICAL
PROPERTIES
|
|
*XX |
A hard paper-based, reinforced laminate with a phenolic resin binder. |
Good machinability and mechanical properties, high dielectric strength and resistance to moisture. Appropriate for most electrical applications. |
|
C |
Grade C is a fabric reinforced laminate made from cotton cloth weighing over 4 ounces per sq yard. | Tough, strong and provides high impact strength. Easily machined and is outstanding for a wide variety of mechanical applications. Fair electrical properties. |
|
*CE |
Grade CE is similar to C in weight of fabric and thread count. Tough and resilient grade for uncommon electrical applications. |
Greater resistance to moisture than Grade C and controlled electrical properties. Easily machined. Good for electrical applications where mechanical strength is needed. |
|
L |
Grade L is a fine weave cotton cloth, reinforced with a phenolic binder. Made from fabric weighing not over 4 ounces/sq yard. |
Good mechanical properties and machines easily. Highly recommended for fine punchings or threading or close tolerance machining. |
|
*LE |
Grade LE is a fine weave cotton fabric grade made of the same thread count of Grade L. Recommended for fabricated parts which need smooth edges and good mechanical strength. |
LE is similar to L, however, LE has improved moisture resistance and increased dimensional stability. Good acid resistance. |
|
G-7 MIL P 997, |
Grade G-7 Glass silicone is a continuous glass fabric laminated with a silicone resin. | Unequalled for high heat and arc resistance applications, and where good mechanical and electrical properties must be exhibited in humid conditions in excess of 500oF. |
|
*G-10 &
FR-4 |
Grade G-10 is a continuous filament woven glass cloth grade, permeated with an epoxy resin. | Good machining characteristics and good flexural, bond and impact strength. Also characterized by excellent electrical properties in a wide variety of temperatures. Low moisture absorption and low heat distortion point. |
|
*G-11 |
G-11 is a glass cloth based material, permeated with an epoxy resin. |
Similar characteristics to G-10 with high mechanical strength up to 150oF and is self-extinguishing. |
*Standard available grades.
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