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Pre-Coated Aluminum Sheets with Conductivity“FUSCOAT LUBERS Series”

1.

INTRODUCTION

As downsizing and weight reduction in portable electronicequipment, notebook PCs, etc. are proceeding, the use of
pre-coated aluminum sheets is increasing replacing galvanized steel sheets and stainless steel sheets. When precoated aluminum sheets are used in such applications,the coating film is often required to have conductivity,
besides formability and corrosion resistance, so as to provide the sheets with grounding and electromagnetic wave
shielding properties.
In view of such needs, Furukawa Electric has developed
pre-coated aluminum sheets “FUSCOAT LUBERSSeries”, which greatly reduce the electrical resistance of
coating film, while maintaining the basic properties as ofstructuring materials.

resin. Furukawa Electric has a lineup of multiple products for each type, thus being capable of responding
to diversified needs.
2) Because the coating film is lubricative, the sheet has
excellent formability thereby permitting processing tocomplicated shapes.
3) The sheet is resistant against finger printing with barehands, thus enabling easy handling.
4) The coating film is hardly soluble against chemicals,so that wide ranges of detergents are available forselection in case of cleansing.
5) Because it is pre-coated, the sheet is stabilized inquality realizing cost reductions on the processed
products.

3.
2.

FEATURES

1) Because the coating film is low in electrical resistance, the sheets are applicable to many productsthat require grounding and shielding properties.
Figure 1 shows the cross sectional structures of thesheets. The sheets can be largely categorized into
two types according to the method of providing conductivity: with and without the addition of conductivity
reinforcing agent into the coating film. The former
uses fine particles of metal as conductivity reinforcing
agent, and the latter is based on electrical conductive

PROPERTIES

Table 1 shows the properties of FUSCOAT LUBARS.
It can be seen that not only is the sheet superior in conductivity to ordinary coated materials, but also it meets all
the property requirements for customers’ production anduse in a satisfactory manner.

4.

USES

The sheet is widely applicable to various electro-electronicequipment such as driving hardware for personal computers and casings for measuring equipment, where ground-

Reducing electrical conductivity of coating film

Addition of conductivity reinforcing agent

Use of electrical conductive resin

Coating film

Coating film

Chemicalconversion film
Aluminum

Chemicalconversion film
Aluminum

Conductivity reinforcing agent

Figure 1

Structures of FUSCOAT LUBARS.

Furukawa Review, No. 23

2003

132

Pre-Coated Aluminum Sheets with Conductivity “FUSCOAT LUBERS Series”

Table 1

Properties of FUSCOAT LUBARS.
Conductivity non-reinforced type

Conductivity reinforced type
ProductItem

FLN01

FLN02

FLN03

FLR01

FLR02

(FC42)(Doujun-1)(Doujun-007)(FC47)(Doujun-A)

Electrical conductivity

Contact resistance (Ω)

≤5≤4

≤3

≤2

≤2Lubricity

Coefficient of dynamic friction

≤ 0.1

≤ 0.1

≤ 0.1

≤ 0.1

≤ 0.1

Ease of handling
Corrosion resistanceFinger-print resistance
External-damage resistance
SST in 100 hrEthanol

Chemical resistanceHydro carbon cleaners
Neutral detergents
Trichloroethylene<Evaluation method>• Electrical conductivity: See the figure below.
ResistancemeterLoad: 500 gfSample
Probe(Made from die steel, 5 mm in tip radius)• Lubricity: Coefficient of dynamic friction is measured using Bawden Tester. Probe with φ3 mm steel ball; Load: 100 gf; No lubrication• Ease of handling: Visibility of finger prints and scratches is checked with visual observation.
• Corrosion resistance: Salt-water spray test in conformity to JIS Z 2371.
• Chemical resistance: Coating film conditions are observed after rubbing test using specified chemicals. Load: 450 gf; Rubbing times: 50 repetition

ing and shielding properties are required.
Figure 2 shows an example of use for a casing of CDROM drive.
For more information, please contact:Developmental Marketing Gr., Developmental
Marketing Dept.
UNIFUS ALUMINUM CO., LTD.
TEL: +81-3-5611-2398
FAX: +81-3-5611-2413
or visit our website at:
http://www.unifus.co.jp/Figure 2

CD-ROM drive using FUSCOAT LUBARS.

Furukawa Review, No. 232003133