PPGI

The coating of color coated board not only plays a protective role, but also increases the decoration, and the color is durable and not easy to fade. Different types of color and surface structure of embossing and printing can also be added to the surface of different types of color coated board. Although the price of traditional steel plate is lower than that of color coated steel plate, the performance price ratio of color coated steel plate still has obvious advantages due to the decoration and protection process after forming.

Compared with traditional steel plate, color coated steel plate has the advantages of convenient installation, fast construction speed (no wet operation), firm and reliable connection, unlimited construction season and no secondary decoration. In order to achieve the same decorative effect of color coated steel plate, the traditional steel plate needs to be coated. Therefore, the construction speed of color coated plate is fast.

Color coated board also has a very favorable advantage in architecture and interior decoration, which can not only play a role in fire prevention. The coating surface can maintain luster even under high temperature baking, and the surface color has no change.

In terms of processing, the surface coating of high-quality color coated plate does not fall off after bending or stamping, and the coating quality is far more uniform, stable and ideal than that of monomer spraying on the formed metal surface.

In terms of service time, the color coated plate is obviously more durable than the traditional steel plate, and can maintain its luster and rust free for more than 20-30 years indoors.

If the use of ppgi is not appropriate, the result is not a high standard of materials, resulting in waste, is the material performance can not meet the use of requirements, the use of the need to choose according to the use of ppgi.

1.The choice of substrate

(1)cold-rolled substrate: poor corrosion resistance, can be used to make home appliances parts

(2) galvanized substrate: Corrosion Resistance Than cold-rolled plate, generally for home appliances shell, furniture, interior decoration.

(3)hot-dip (aluminum) zinc substrate: corrosion resistance, external construction.

2.Coating Selection

(1)color: General Color for White Gray, sea blue, special color order to increase the price and order time.

(2)GLOSS: the Gloss of the film is high, medium and low. General Construction for 30-70 csomething O low gloss color coated roll

(3)corrosion resistance.

3.The choice of coating technology

general outer plate with 2/2 PPGI, field composite plate type can also use 2/1 PPGI, EPS composite plate must use 2/1 PPGI, in order to have better adhesion, aluminized zinc plate is generally used for roofing site composite plate, after some process can also be used aluminized zinc plate to do EPS composite plate.

4.Attention in the use of the problem

(1)PPGI used in a building, the use of the same manufacturer the same production line at the same time products, to avoid mixing.

(2)the necessary peritoneum during pressing forming, such as PVDF coated color coated sheet, aluminized zinc coated sheet.

(3)when the PPGI is sheared, the surface of the equipment in contact with the PPGI should be covered with rubber mat.

(4)remove the metal chips in time to avoid scratching the coating on the surface of the PPGI.

(5)zinc can be used as a sacrificial anode to protect the steel, but when in use, try to place the incised part of the PPGI in the hidden part, there are strict requirements of the project to protect the incisions.

(6) after the installation of the project, the welding spots and metal chips left over from

The quality of PPGI is mainly the detection of coating pretreatment and coating performance. The pretreatment detection of coating includes two aspects: degreasing and chemical conversion coating. Coating detection includes two aspects of coating detection technical performance (such as adhesion, weakness, impact strength, hardness, skin, etc.) and special properties with protective functions (such as weather resistance, acid and alkali resistance, and oil resistance) . Good performance, and the characteristic performance with protection function, can be tested according to different use requirements, and the above two performance tests can be performed internationally.

The so-called color coated steel plate refers to the color coated steel plate, which is a kind of steel plate with organic coating. At present, color steel plate is widely used in the walls and roofs of large public buildings, public factories, movable plank houses and integrated houses. Identify the advantages and disadvantages of color steel plate, and observe the thickness of substrate and coating. Color steel plate is composed of substrate and color coating or coating. We must first consider the thickness of substrate and coating. A better color steel plate substrate is 0.02-0.05mm, and the coating or coating thickness is often less than 0.15mm. Because the thickness of the substrate is very important in terms of affecting the service time of the color steel plate. Some manufacturers make changes on the substrate and color steel plate coating or coating. They reduce the thickness of the substrate, but increase the thickness of the peritoneum to reduce the production cost of color steel plate, which greatly reduces the service life of color steel plate. Observe the leakage edge of the color steel plate. Of course, I think observing the leakage edge of color steel plate is also a relatively simple method. When we get a color steel plate, we can first observe whether the exposed steel of the color steel plate has fine crystallization, gray, dark and impurities.

If the section is fine crystalline, the quality is superior. The method of listening to sound is also relatively simple, that is, knocking the color steel plate with fingers or hard objects. If the material of the color steel plate is poor, the sound is dull and the metal sound is not obvious; The sound of color steel plate with good material is loud and crisp.

Be sure to pay attention to the solubility and temperature of the applied cleaning solution during the removal step of PPGI. If the cleaning solution is too low, the oil stains on the surface of the board will not be cleaned, resulting in disadvantages in the subsequent chemical coating treatment and damage to the quality of the coating; The surface layer of the zinc and aluminum layers in the solution simply constitutes saccharate, which causes worrying corrosion and then damages the molecular biology coating effect behind it.

Organic chemical cleaning fluids generally contain surfactants. The best way for various surfactants to create high efficiency is that there are differences in temperature. If the temperature is too high, the credibility of the surfactant will be reduced, which will reduce the ability of the cleaning fluid to remove oil stains; if the temperature is too low, the saponification reaction speed is too slow to completely eliminate the oil stains, which will cause more foam damage and removal. In addition, the temperature of the cleaning liquid is too high to accelerate the corrosion of the zinc and aluminum layers when the liquid is exchanged.

PPGI will have bubbles due to external factors, which not only affects welding, but also affects the aesthetics. Therefore, we need to avoid this situation as much as possible during welding. What is the cause of the bubble phenomenon of PPGI?

If the welding surface of the PPGI is not cleaned, it is very easy to cause the appearance of bubbles, such as the presence of oil stains, moisture and other ingredients. In this regard, we can solve this problem by cleaning the surface to be welded. Impure shielding gas can also lead to the production of bubbles. For this, 99.99% argon can be used to deal with this problem. If the electrode tip is exposed to the air, bubbles will also appear. Therefore, we must keep the end of the electrode under the protection of the rare gas when welding the PPGI.

The three methods introduced above can prevent bubbles from being generated during electric welding of color-coated plates. For the bubbles that have already appeared, we can directly use an angle grinder to grind them away.