| Super-Hemit®, a newly developed highly efficient heat insulation board,
has bean developed using Sumitomo Bakelite's long experience with composite
molding architecture. The features and characteristics of Super-Hemit® are
summarized as follows: |
| 1. |
This products raw material comprise of glass cloth and specific synthetic
resins. This means that it is completely free from asbestos, and therefore
environmentally friendly. |
| 2. |
The mechanical strength in terms of loaded thickness dislocation is half of
asbestos materials composition and the compressed load yielding strength remains at 40Kg/mm2 under 200ºC. |
| 3. |
The thermal conductivity of 0.21W/mk up to 200ºC is lower than current
asbestos materials or glass compositions and therefore the following merits
can be secured:
(1) The time of heating molds is shortened
(2) The rise of the molding machine is speeded up.
(3) Energy is saved. |
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Representative properties
|
|
|
Item
|
Unit
|
Conditioning
|
Measured value
|
|
Flexural strength (vertical)
|
MPa
|
A
|
410
|
|
E-/200
|
130
|
|
Compression strength (vertical)
|
MPa
|
A
|
580
|
|
E-/200
|
270
|
|
Compressed creep strain (vertical)
(150kg/cm2)
|
%
|
E-720/200
|
1.99
|
| Izod impact strength (vertical) |
J/cm
|
A
|
15.3
|
|
Bonding strength
|
KN
|
A
|
7.2
|
|
Rockwell hardness
|
HRM
|
A
|
120
|
|
Water absorption
|
%
|
E-24/50+D-24/23
|
0.02
|
|
Specific gravity
|
-
|
A
|
1.86
|
|
Thermal conductivity (vertical)
|
Kcal/nhºC
|
A
|
0.344
|
|
Coefficient of thermal expansion (vertical)
|
1/ºC
|
30ºC→200ºC
|
1.9×10-4
|
|
Dimensional change under heating
|
MD
|
%
|
E-700/180
|
0.08
|
|
TD
|
0.09
|
|
Thickness
|
0.36
|
|
Weight change by heating
|
%
|
E-700/180
|
1.58
|
|
|
|
Coefficient to linear expansion
|
|
|
|
MD
|
TD
|
Thickness D
|
|
180ºC (1/ºC×10-5)
|
0.6
|
0.8
|
9.1
|
|
150ºC (1/ºC×10-5)
|
1.1
|
1.3
|
7.8
|
|
