What is ppgi sheet?

PPGI sheet (Pre-Painted Galvanized Iron, pre-coated galvanized steel) as a surface galvanized and pre-coated metal sheet, plays a very important role in the modern industrial field, its application range widely covers construction, home appliances and many other key areas. Here is a detailed and comprehensive list of key information about it:

Core structure

Substrate

Cold-rolled steel plate is usually used as the substrate material. The cold-rolled steel sheet has excellent mechanical properties and good surface quality, which can provide a solid and reliable foundation strength for the entire PPGI sheet. This high strength foundation makes PPGI sheet in the subsequent use process, whether it is subjected to external forces or cope with a variety of complex environments, can maintain stable structural performance, not easy to deformation or damage.

Galvanized layer

The formation of galvanizing layer is achieved by advanced hot dip galvanizing process. In this process, a pre-treated cold-rolled steel plate is immersed in a molten zinc solution so that the zinc layer is tightly bound to the steel plate matrix. This layer of galvanized layer has excellent rust resistance and corrosion resistance, which is like a solid protective armor, effectively blocking the erosion of water, oxygen and other corrosive substances in the external environment. Even in humid, rainy or corrosive gas environments, the galvanized layer can play its powerful protective role, greatly extending the service life of PPGI sheet.

Coating

The coating is a multi-layer coating process, which generally includes two parts: primer and top paint. The design of this multi-layer coating structure has been carefully considered to provide more comprehensive and long-lasting protection for PPGI sheets. Common coating materials are polyester (PE), silicon modified polyester (SMP) or polyvinylidene fluoride (PVDF).

Polyester (PE) coating has good adhesion and flexibility, can be tightly bonded to the substrate, and can maintain stable performance under different temperature and humidity conditions. The silicon modified polyester (SMP) coating is more prominent in weather resistance and corrosion resistance, and can resist many adverse factors such as ultraviolet radiation and acid and alkali corrosion in long-term outdoor use. Polyvinylidene fluoride (PVDF) coating is known for its excellent weather resistance, chemical resistance and self-cleaning properties, especially for high weather resistance environments with high durability and appearance requirements, such as building exterior decoration in coastal areas. These coatings not only give PPGI sheets a wide variety of color options, enabling them to meet the aesthetic needs of different users, but also provide them with additional protective functions, further enhancing the overall performance of the sheet.

Main characteristics

Corrosion resistance

Due to the dual protection mechanism of galvanized layer and coating, PPGI sheet has excellent corrosion resistance. As the first line of defense, the galvanized layer can effectively prevent the direct contact between the steel matrix and the external corrosive substances, so as to play a preliminary anti-rust role. The coating acts as a second line of defense, further isolating the erosion of the steel plate by air, moisture and various chemicals. The synergistic effect of this dual protection greatly extends the service life of PPGI sheets, enabling them to maintain good performance and appearance under harsh environmental conditions.

Highly decorative

PPGI panels come in a wide variety of colors to meet almost any design need. Whether it is bright and bright colors or understated calm tones, it can be achieved through different coating formulations and coating processes. At the same time, the surface is smooth and smooth, the texture is fine, and it can be directly used for the production of various appearance parts without additional surface treatment. This makes PPGI panels have great advantages in architectural decoration, home appliance housings and other fields, and can add unique visual charm and high-quality appearance to the product.

Easy to process

PPGI sheet has good processing properties and is very suitable for shearing, stamping, bending and other processing processes. Its softness is moderate, neither because it is too hard to cause processing difficulties, nor because it is too soft to affect the processing accuracy. This excellent processing performance allows PPGI sheet to easily adapt to a variety of different modeling needs, whether it is a simple flat shape or a complex curved surface structure, can be achieved through the corresponding processing technology. For example, in the automotive manufacturing process, PPGI sheets can be processed into various shapes of body parts; In furniture manufacturing, a variety of unique cabinets and office partitions can also be made according to design requirements.

Environmental protection

Since PPGI panels are pre-coated in the factory, compared with the traditional on-site coating method, the emission of volatile organic compounds (VOC) and other pollutants generated during the on-site construction process is greatly reduced. This not only helps to protect the environment around the construction site and the health of the staff, but also meets the requirements of modern society for green and environmentally friendly building materials. In addition, the recyclability of PPGI sheet is also good, and at the end of its service life, it can be reused through reasonable recycling treatment, further reducing the impact on the environment.

Lightweight

Under the premise of ensuring excellent performance, the relatively light weight of PPGI sheet is one of the most significant advantages. Compared with traditional heavy metal materials, the lightweight characteristics of PPGI sheets make it more cost-effective and practical in many application scenarios. For example, in the field of construction, the use of lightweight PPGI panels can reduce the overall weight of buildings and reduce the cost and difficulty of infrastructure construction; In the field of transportation, the use of lightweight PPGI panels as interior or compartment panels for vehicles can effectively reduce the body weight of the vehicle, thereby improving fuel economy and transportation efficiency.

Typical application

Construction field

Roofing: PPGI panels are often used for building roofing. Its good corrosion resistance enables it to remain stable and durable in long-term exposure to the natural environment, and is not easy to rust or damage. At the same time, the rich and varied color choices can meet the needs of different architectural styles, adding a unique appearance to the building. Moreover, due to its easy processing characteristics, it can be flexibly cut and installed according to the shape and size of the roof, ensuring the waterproof performance of the roof and the overall beauty.

Walls: In the application of building walls, PPGI panels also show their excellent performance. It can be used as an exterior decoration material, not only to protect the main structure of the building, but also to create different visual effects through its rich colors and textures. For example, in some commercial buildings or residential communities, the use of colored PPGI panels can make the appearance of the building more eye-catching and beautiful. In addition, the thermal insulation properties of PPGI panels also help to improve the energy efficiency of buildings.

Partition: In large public buildings such as airports and gymnasiums, PPGI panels are often used as partition materials. It can be flexibly separated according to different spatial requirements to form different functional areas. At the same time, its good fire performance and sound insulation performance can provide a safe and comfortable environment for personnel. Moreover, PPGI sheets have a smooth, flat surface that is easy to clean and maintain, making them ideal for use in these densely populated locations.

Home appliance field

Refrigerator: The use of PPGI sheet for the refrigerator shell can provide good protection and aesthetic effect. Its corrosion resistance can prevent the refrigerator from being eroded by water vapor and oil smoke in the kitchen environment during use, and extend the service life of the refrigerator. At the same time, the colorful appearance of PPGI sheet can meet the needs of consumers for personalized and fashionable household appliances, making the refrigerator a beautiful decoration in the kitchen.

Washing machine: The washing machine needs to be in frequent contact with chemicals such as water and detergent during the working process, so the corrosion resistance of its shell material is higher. The galvanized layer and coating of PPGI sheet can effectively resist the corrosion of these substances, maintaining the integrity and beauty of the washing machine shell. In addition, the lightweight characteristics of PPGI sheets also help to reduce the overall weight of the washing machine and facilitate the handling and use of users.

Air conditioning housing: Air conditioners are usually installed on outdoor or indoor walls and need to withstand the influence of wind and sun and various environmental factors. The weatherability and corrosion resistance of PPGI sheets make them an ideal material for air conditioning housings. It can maintain stable performance under different climatic conditions, prevent problems such as rust and fading of the shell, and also provide good protection for the air conditioner to ensure its normal operation.

Transportation field

Automotive interiors: PPGI panels are being used more and more widely in automotive interiors. It can be used to make car seats, door upholstery panels, dashboards and other components. Its good decorative performance can create a comfortable and luxurious atmosphere for the interior of the car; And its easy processing characteristics can meet the needs of complex automotive interior design. In addition, the environmental performance of PPGI panels also meets the requirements of the automotive industry for green materials.

In the manufacture of freight trains or truck carriages, PPGI sheets are often used as carriage plates. It has the advantages of high strength, light weight and corrosion resistance, and can withstand the weight of goods and various impact forces during transportation. At the same time, the surface of the PPGI sheet can be specially treated to improve its wear resistance and anti-slip properties, ensuring the safety of the goods during transportation.

Noise barriers: Setting noise barriers on both sides of highways, railways and other traffic trunk lines is one of the effective measures to reduce the impact of traffic noise on the surrounding environment. PPGI sheet is widely used in the manufacture of noise barriers because of its good sound insulation performance and weather resistance. It can effectively absorb and reflect traffic noise, creating a quiet living and working environment for residents along the line.

Furniture field

Cabinets: In furniture manufacturing, PPGI sheets are often used to make cabinets. Its rich colors and textures can meet the needs of different consumers for kitchen decoration styles, making the cabinet a beautiful landscape in the kitchen. At the same time, the moisture-proof and antibacterial properties of PPGI sheet are also very suitable for the humid environment of the kitchen, which is easy to breed bacteria.

Office partition: In the office space, PPGI panels can be used to make office partitions. It can be flexibly separated according to the spatial layout and design style of the office, creating different work areas. Moreover, the surface of the PPGI sheet is smooth and smooth, easy to clean and maintain, and can provide a clean and comfortable working environment for office workers.

Other names

PPGI sheet is also known as color coated sheet or color galvanized steel sheet. The main difference between it and ordinary galvanized sheet (GI) is the presence of a pre-coated layer. Although ordinary galvanized sheet also has certain anti-corrosion properties, because there is no pre-coated layer, its appearance is relatively simple, and it is not as good as PPGI sheet in weather resistance. The pre-coated layer of PPGI sheet can not only provide better aesthetics, giving it a colorful appearance, but also significantly improve its weather resistance. In different application environments, different coating materials play their respective roles. For example, polyvinylidene fluoride (PVDF) coating because of its excellent weather resistance, chemical resistance and self-cleaning properties, especially suitable for high weather resistance environment, such as building exterior wall decoration in coastal areas; The polyester coating is commonly used for general purposes, such as interior decoration, ordinary building roofing, etc., and its cost is relatively low and can meet the needs of use in most cases.