TECHNICAL INFORMATION

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Type of Signs

Section

Surface Treatment and Painting Process

 *         Powder coating by Tribostatic charging (friction charging) – Indoor Products.

By increasing the flow speed and constricting the spray tube bore of the gun, the powder particles get charged by being rubbed against the hose wall.  Thus, between the spray gun and the object, no powder electric fields and lines of force develop.  This makes it possible to achieve good powder penetration into other ways inaccessible area.  By being less dependent on spray distance and the geometry of components, the tribostatic method often secures a more uniform coat thickness.

*          5 Stages pre-treatment of Iron and Steel

- Degreasing

- Iron Phosphate

- Rinse

- Rinse

- Deionization water rinse

*          Powder coating by Electrostatic charging – Outdoor products

A high, usually negative, voltage of 40-100 kV causes a large number of electrons to attach to the powder particles. In addition to this build up of charge on the particles, a large number of electrons are carried through the air, causing the objects to receive considerably more charge than is transferred through the powder itself.

*          7 Stages Pre-treatment Aluminum

- Degreasing

- Rinse

- Etching

- Rinse

- Chromatisation

- Rinse

- Demi-rinse

Corrosion class 4: Constant, high humidity. Near industry which manufactures or utilizes chemicals.  VERY LARGE CORROSION RISK (AGGRESSIVITY).

*          Wet painting – Indoor and outdoor products

This manual application is carried-out in a painting booth.  The paint is directly supplied through air powdered double diaphragm pump to spray guns.  This ensures a constant and virtually non-pulsing paint delivery giving a high quality of the painted surface.  The process handles products that are not possible with automatic powder paint process due to its size or special colour requirement.

*         Quality Assurance (based on ISO-9000) is of high importance at SLC’s painting lines.  Twice each production shifts, a test plate undergoes the following quality tests:

- GLOSS

- COATING THICKNESS

- SCRATCH TEST, HARDNESS

- IMPACT ADHESIVENESS

- BENDING TEST

With the latest painting equipment and the highest corrosion classification 4 (Pre-treatment of Aluminum – Outdoor products) SLC is market leader in both quality and in technology.