HOW TO CHOOSE THE RIGHT PRE-PAINTED PRODUCT

HOW TO CHOOSE THE RIGHT PRE-PAINTED PRODUCT PART 1 The insulating panel and the pre-painted sheets: some notes PART 2 The Isopan range of pre-painted products 9 PART 3 How to extend the durability of a pre-painted product PART 4 How to choose the right pre-painted product 14 PART 5 How to choose the colour of a pre-painted product PART 6 Flashing elements 23 PART 7 The importance of zinc coat for pre-painted products PART 8 Pre-painted products and food contact 25

THE INSULATING PANEL AND THE PRE-PAINTED SHEETS: SOME NOTES INTRODUCTION ON PRE-PAINTED SHEETS This Isopan guide aims at giving clients and users advices on how to choose the right pre-painted sheet looking at the technical properties of the product. ISOPAN PANELS The ISOPAN Panel is assembled in a continuous process from an insulting mass in rigid polyurethane with high density closed cells or in composite mineral wool with two metal profiled sheets. The two sides of the panel are sometimes exposed to two completely different environments. METAL SHEET INSULATING MASS METAL SHEET • EXTERNAL SURFACE:...

The metal must be chosen on the basis of considerations on the expected durability of the product, the environment to which it is exposed, its aesthetics and its price. Isopan provides a wide range of metal sheets: “BLANK” METALS 1. Aluminium, copper, stainless steel. COATED METALS 2. Hot-dip galvanised steels with different ranges of zinc, aluminium-zinc steels (ALUZINC), pre-painted steels and pre-painted aluminium. PRE-PAINTED SHEETS FOR PANELS Pre-painted sheets can be provided on hot-dip galvanised steel substrate or on aluminium. Some of the following considerations about the layer of paint...

The steel bands are pre-painted on a continuous process called coil coating. The metal sheet that has to be pre-painted is made of hot-dip galvanised bands (SENDZMIR) which are appropriately rubbed down on the surface and coated with a zinc layer of 100 g/m2 to 275 g/m2, depending on the purpose. The steel band is unrolled on the continuous line and the paint is applied with coaters in the following steps: 1. Chemical treatment on the surface as conversion coating; this layer is essential to improve paint adhesion and reduce under skin corrosion. Both sides of the band undergo this treatment...

part 1 paint layers can be applied with only one cycle of the painting line by simply settin the thickness of every layer. Pre-painted STANDARD Application CORRUGATED SHEETS Pre-painted BACK FOAM Application PANELS Top paint Primer paint Pre-treatment Galvanizing Steel Galvanisation Pre-treatment Back paint Top paint Primer paint Pre-treatment Galvanizing Steel Galvanisation Pre-treatment Back paint Internal surface Internal surface Pre-painted DOUBLE FACE Application CORRUGATED SHEETS Pre-painted BACK COLOR Application CORRUGATED SHEETS Top paint Primer paint Pre-treatment Galvanizing Steel...

PROPERTIES OF THE COIL COATING PAINTS The used paints have been exclusively designed for the “coil coating” process and are made of polymer resins, which are fasteners, cross linkers such as melamine, several additives, solvents as well as colour pigments. POLYESTER PAINTS Paints made with oil free polyesters or amino resins must guarantee high product durability; by durability we mean no degradation and not absence of holes. What determine the product durability the most are water and its salts carried by the wind (in few words corrosion). UV action coming from the sun is also called photo degradation....

PAINTS WITH BARRIER EFFECT, PVC This product is also called Plastisol and it is made by a dispersion of PVC, polyvinyl chloride. It can have thickness from 100 microns to above 200 microns, which represents an optimal barrier. Chemical resistance is however lower than by PVDF. PLASTIC COATED SHEETS - SKIN PLATE Skin plates are steels, which are not coated with paints but with PVC films. They are usually used for inside application. They are usually applied for internal surfaces of wall panels, which have to be washed very often because of their aesthetic value. They are also used very often for...

the isopan range of pre-painted products Designers can choose from a wide range of Isopan types of pre-painted steels, which are listed next with the official names assigned by the norm on pre-painted products. range of isopan pre-painted PRUDUCTS- name given by the norm EN 10169-2 name abbrevation standard thickness p High durability polyesters PS HD P HD 25 Polyvinylidene fluoride PVDF 25/35 Thick resins PUR-PA PUR-PA 50/55 Plastic coated polyvinyl chloride PVC (F) 100 STANDARD polyester - thickness: 25 h Polyester pre-painted sheets have a 25-y-thick paint layer made of 5-y primer paint and...

POLYVINYILDEN FLUORIDE PVDF - THICKNESS: 25 µ PVDF poly fluorocarbon pre-painted sheets have a 25-µ-thick paint layer made of 5 µ primer paint and a 20 µ PVDF enamel. To improve resistance to corrosion in highly polluted environments, resistance to UV and paint layer flexibility, PVDF paint has been made completely different from polyester. Thank to its particular chemical structure, which has no organic functional group, which can be attacked, PVDFs are the most resistant pre-painted products. Resistance to corrosion is classified as RC4, resistance to UV as RUV3. A 200g/m² minimum Zinc coating...

HOW TO EXTEND THE DURABILITY OF A PRE-PAINTED PRODUCT To choose a pre-painted product one must consider the environment where the building is placed, the possibility of corrosion and of course the geographical position, as well as the UV influence. Designers and users can have a look at the results of the simulation tests to evaluate the differences between the different products: • For example the salty fog test, which helps to understand how much corrosion can build on the product after a few hours in the salty fog room. • or the QUV test that evaluates the loss of colour and gloss caused by...