Wrinkle Matt Prepainted Steel Coil

Prepainted galvalume steel coils used galvalume/aluzinc (AZ20 -275gsm) steel coils as the basic raw materail. After pretreatment (the surface of the basic raw materail is cleaned to remove impurities, degreasing, and undergoes composite oxidation and passivation treatment), the surface is coated with PE. SMP, PVDF paint is then baked and solidified. It is more suitable for applications in corrosive and coastal areas.

BOMIS  is one of professional PPGL supplier factory in China Shandong province . We supply all RAL colors and special patterns can be made, such as wood grain, flower print, camouflage, and brick. We manufacture thickness is 0.1-2.0 mm, width is 600-1250 mm, color painting includes PE, HDP ,SMP, and PVDF to meet customer needs.

We offer commercial steel (CS Types A, B, and C) and structural steel (SS). We use Polyester, Silicone Modified Polyester, Polyvinylidene Difluoride paints for customers to choose from.

Paint Coating Thickness

The Top Finish Coating Is Larger Than 20μm To Prevent The Intrusion Of Corrosive Media. Due To The Different Anti-Corrosion Mechanisms Of Primer And Finish Coating, Not Only The Total Coating Thickness Should Be Guaranteed, But Also The Thickness Of Primer (>5μm) And Finish Coating (>15μm).

PVDF Pre-Painted Galvalume Steel Coil Requires A Thicker Coating. It Provides A Longer Service Life. The Requirements For The Backside Paint Coating Depend On The Application, And The Sandwich Panel Only Requires A Layer Of Primer. The Formed Steel Plate Requires Two Coats. The Thickness Is At Least Greater Than 10 Μm.

Coating Thickness: For Polyester, The Thickness Of The Primary Coating Is Generally 14um, And The Thickness Of The Secondary Coating Is Generally More Than 20um.

Coating Color: According To The User's Needs To Choose (Common Colors Are White Gray, Aquamarine, Ivory, Scarlet, Orange, Dark Soybean Green, Brick Red, Etc.)

Pre painted Galvalume Steel Coils Structure

Prepainted galvalume steel coil coatings can be divided into three categories: primer, topcoat, and backcoat. Common ones are 2/2 and 2/1 coating structures.

The back side of the 2/1 can be coated with a layer of primer or only a layer of backcoat. It is mainly used for sandwich panels, which require the coating to have good bonding and foaming properties. The 2/2 uses a two-coat system of primer and backcoat, and is used as a single steel sheet.

Top Finish Coating (PE/HDP/PVDF, etc.), When the thickness is above 20um, it can effectively prevent the damage of ultraviolet rays and harsh environments to the coating.

1.Primer Coating 

2.Surface Treatment Layer(Chromate Coating)

3.Metallic Coated Layer (aluzinc)

4.Steel Substrate (Cold Rolled Steel Sheet) 

5.Metallic Coated Layer (aluzinc)

6.Surface Treatment Layer (Chromate Coating)

7.Back Primer 

8.Back Finish Coating(Epoxy, Polyester )

Package: 

Each coil to be securely tied with two bands through the eye coil and one circumferential, the contact points of these bands on the coil edge to be protect with edge protectors. Coil then to be properly wrapped with water proof/resistant paper, it then to be properly and completely metal wrapped. And each packed coil to be properly wrapped with band, three-six such band through the eye of coil at about equal distance, and two-four such bands securely tied around belly of coil at about equal distance.

1-Steel coil; 2-Outer peripheral anti-rust paper; 3-Inner core anti-rust paper; 4-Paper inner corner protector; 5-Paper outer corner protector; 6-Plastic sleeve; 7-Outer peripheral corrugated paper; 8-Round corrugated paper protector; 9-Outer peripheral wrapping plate; 10-Inner peripheral protector; 11-Ferrous round corrugated paper protector; 12-Ferrous outer corrugated paper protector; 13-Ferrous inner corrugated paper protector; 14-Peripheral bundling tape; 15-Radial bundling tape; 16-Locking gasket; 17-Locking clips