Color Painting Steel Panel and Filming steel Panel

Steel Panel is the basic raw material of steel drum production line.

Basic concepts:
On the unit in a continuous cold-rolled strip steel, galvanized steel ( galvanized and hot dip galvanized ) as the substrate , through surface pretreatment ( degreasing and chemical treatment ) , with a roll coating method , coated with one or more layers of liquid coatings , chemical after baking and cooling the resulting sheet is coated steel . Since the coating can have a variety of colors, the habits of the coated steel called color coated steel . Also, because the coating is a steel sheet before forming , and in foreign countries this is called pre-coated steel sheet .

Process

Color coated steel is cold rolled steel and galvanized steel as the substrate , after the surface pretreatment ( degreasing , cleaning, chemical conversion treatment ) , in order to apply the paint in a continuous process ( roll coating method ) , after baking and cooling of the system into products.

Common two painted two baking process with continuous color coating unit main production processes : uncoiling → ​​pretreatment → coating → ​​baking → ​​post-processing → ​​coiling .

Product Use:

Coated steel with a light , beautiful and good corrosion resistance , can be directly processed , it gives the construction industry , shipbuilding , vehicle manufacturing industry , the furniture industry , the electrical industry to provide a new type of raw material , played by steel -generation wood, efficient construction , energy conservation , pollution prevention and other good results . Use galvanized steel color coated steel substrate , with the exception of zinc protection, the organic coating on the zinc layer plays a role in covering isolation to prevent rusting steel , longer service life than galvanized steel , it was introduced coating galvanized steel plate life 50% longer than that . However, in the different regions and the use of different parts of the same amount of zinc , the same kind of coating, the same coating thickness of color coated plate , its life will be very different .For example, in industrial areas or coastal areas, due to sulfur dioxide gas or a salt effect , etching speed, the service life is affected.

During the rainy season , long coat soaked by rain or condensation in the day and night temperature too easy to parts will corrode quickly , life will be reduced.

Made with color coated steel buildings or factories, often by rainwater flushing longer service life , otherwise , due to sulfur dioxide gas , salt and dust affect the use of the role .Therefore , in the design , if the roof slope is larger, less likely to accumulate dust and dirt , longer service life ; For those who frequently wash the area from rain or parts, should regularly wash with water.

Colored steel classification

Color coated steel products can be made ​​of cold rolled substrate , hot dip galvanized and electro-galvanized substrate substrate . Classified according to color coated steel substrate types are as follows:

Color coated steel

Color coated steel cold-rolled substrate

Galvanized color coated steel

Hot galvanized color coated steel zinc plated 5% aluminum color coated steel

55% aluminum-zinc plated color -coated steel

Galvanized color coated steel

Other printing color plates

Metal embossed color plates

■ color coated steel cold-rolled substrate

The color of the substrate produced by the cold plate having a smooth beautiful appearance, and the processing performance of a cold-rolled sheet ; , but any small scratches the coating substrate will be exposed to cold air, so that the dew point quickly iron generate red rust . Therefore, these products can only be used for less demanding temporary quarantine measures and for interior timber.

■ Galvanized color coated steel

The organic paint coated galvanized steel sheet in the product obtained shall be hot dip galvanized color coated . Galvanized color coated protective effect of zinc addition to the outer surface of the organic coating also isolated from the protection against rust effect , a longer service life than hot dip galvanized sheet . Zinc galvanized substrate is generally 180g/m2 ( two-sided ) , building external galvanized hot dip galvanized substrate up to the amount of 275g/m2.

■ Hot galvanized color coated

Upon request, can also be used as a pre-painted hot galvanized steel substrate (55% AI-Zn and 5% AI-Zn).

■ Galvanized color coated

Electric galvanized sheet as the substrate , coated with organic coating baking the resulting product is galvanized color coated galvanized sheet zinc as thin , usually zinc content of 20/20g/m2, so the product is not suitable for use production of the outdoor walls , roofs. But there is a beautiful appearance and excellent processing performance , so the main can be used for home appliances, audio , steel furniture, interior decoration and so on.

■ Paint

Coating is a powder state flow condition or organic , can be applied to the dried and cured on the substrate to form a thin film uniformly covering and adhered well . The main performance of protective resistance (such as moisture resistance , water resistance, weather resistance, chemical resistance , etc. ) and decorative ( have a variety of color and gloss ) .

■ coating composition and its role

A variety of coatings , has four components , namely (1 ) Resin ( 2 ) Pigment ( 3 ) Solvent ( 4 ) additives. Wherein the solvent is volatile , it is not essential for the three parts volatiles .

( 1 ) Resin

Resin film material that is the main ingredient in paint and foundation , also known as the base material, it was decided to film the nature of the main factors. Requests for the coating film-forming resin material is quite stable during storage , no obvious physical changes and chemical changes ; in the film when , under the specified conditions can be quickly cured film .

A wide range of resins , commonly used in coil coating resins are acrylic resin , epoxy resin, polyester resin and polyurethane resin. Different trees ' resin , its physical and chemical properties , and weather resistance, corrosion resistance is not the same .

( 2 ) Pigment

Pigments and resins to be used in conjunction with a major role in the coating so that the coating is colored pigments in different proportions will affect the film hardness , gloss and corrosion resistance .

( 3 ) Solvent

The solvent is an important part of a liquid paint , the paint drying process is to volatile components . Generally adjusted with solvent coating viscosity , which is used to adjust the viscosity of the solvent, paint thinner called . Solvent for paint manufacture, storage , coating , film formation and film quality has a great impact .

( 4 ) Additives

Aid is to improve coating performance and a small amount of additive added . Minimal amount of additives in the coating , but a significant role , if any, can improve the performance of coatings and film , and some can improve the drying time , and some can prevent the coating produce morbid and so on. Additives wide range, there driers, curing agents , leveling agents , defoamers , matting agents , stabilizers.

Almost most of the liquid coating consists of the four components in the composition of certain raw materials , of which the most important is the resin , which is any coating are unavoidable. It can be said resin ( sometimes plus solvents and additives ) is lacquer, you can then add pigment into a variety of paint .

Color coated steel with coatings generally divided into two categories according to use : the construction and appliance use . Architectural coatings according to environment, in the epoxy resin , polyester resin , polyvinyl chloride sol , silicon modified polyester and poly (vinylidene fluoride) in the selection. Appliances with coatings generally colored polyester resins.