NewNew Products
Products

High Heat-Radiation Pre-Coated Aluminum Sheet,
FUSCOAT HS Series

INTRODUCTION

As performance improves in electric and electronicequipment in recent years, the amount of heat generated
in these equipment is increasing. On the other hand,space-saving design is spreading thus restricting
installation of heat dissipating fans. Consequently,
temperatures within these equipment tend to rise
substantially, thereby impeding full exhibition of theirinherent performance. This is why the technique ofdissipating heat externally has emerged as an important
point in equipment designing.
Against this background, UniFus Aluminum hasdeveloped a highly heat-radiative pre-coated aluminum
sheet, FUSCOAT HS series, where HS standing for “heatsolution.”

2.

FEATURES

1) The heat-radiation property of the product is almost
equal to that of the ideal black body over 4~14 µm,
i.e. an essential wavelength range in terms of heatradiation. The property was experimentally verified
at the Kanagawa Industrial Technology ResearchInstitute. Thus FUSCOAT HS series compares
favorably with black anodized aluminum film, arepresentative material of good heat-radiation
property.
2) The combination of aluminum base material of goodheat conductivity with FUSCOAT HS series ensures
superior heat radiation.
3) Due to its superior formability and high degreeof flexibility in forming, FUSCOAT HS series is afeasible substitute material for post-anodizing andpost-coating processes, raising a good prospect forconsiderable cost reduction.

Highly heat-radiative coating
Chemical conversion coating
Aluminum sheet
Chemical conversion coating

Figure 14.

Table 1 shows measured emissivity of various materials,and Figure 2 and Figure 3 show the spectral emissivity
and the experimental data on the emissivity of FUSCOAT
HS series. From Figure 3 it can be seen that comparedwith unpainted materials with an emissivity of 0.1,
FUSCOAT HS with an emissivity of 0.92 can reducethe material temperature by about 10°C. Not only has
FUSCOAT HS series superior heat radiation property,
but also its other properties satisfactorily meet thestandard specified in JIS H 4001, “Painted aluminium andaluminium alloy sheets and strips.”
1.0

0.8

0.6

0.4

0.2

05

1015

Wavelength (µm)

Figure 23.

Structure of coating layer.

PROPERTIES

Total emissivity

1.

Spectral emissivity of FUSCOAT HS at 60°C.

STRUCTURE OF COATING LAYER

Figure 1 shows the structure of the coating layer. After
conversion treatment is applied onto the aluminum barematerial as an undercoat, highly heat-radiative coating isprovided.

Furukawa Review, No. 26

2004

58

High Heat-Radiation Pre-Coated Aluminum Sheet, FUSCOAT HS Series

Table 1

Measured emissivity of various materials.

FUSCOAT HS, black

0.75~0.92

Anodized aluminum film

0.70~0.80

Bare aluminum

0.05~0.10

Bare stainless steel

0.15

Bare steel

0.06

Coal, smooth surface

0.80

Notes:• Emissivity of ideal black body is 1.0.
• Black paint can increase the emissivity of an unpainted surface largely
by a factor of 10.

Shielding panel

Outline of measuring set up

Heater (10 mm sq.)

Painted aluminum sheet

Thermo couples
Thermal insulator

10090

Figure 4

Temperature (˚C)

80

Application example of back cover for plasma display
panel.

7060

For more information, please contact:
Marketing Gr., Marketing Dept., UniFus Aluminum
Arca Central Bldg 20F, 2-1, Kinshi 1-chome, Sumida-ku,Tokyo, 130-0013
TEL: +81-3-5611-2398
FAX: +81-3-5611-2413

50403020
1000.0

0.2

0.4

0.6

0.8

1.0

Emissivity
CenterFigure 3

5.

Difference (Center-End)End

Experimental data on emissivity and temperature.

APPLICATIONSWith its superior heat radiation and formability, FUSCOAT
HS series has been adopted in various commodities suchas back covers for large-sized TV sets and monitors, heatradiators for IC substrates, heat radiators for under-floor
heating systems.
Figure 4 shows an application example of a back coverfor plasma display panel.

Furukawa Review, No. 26

200459