EnglishViews: 343 Author: Julong Publish Time: 2024-01-26 Origin: aluminum panel systems manufacturer
We will discover that there are indications of inadequate adhesion surrounding the bubbling when we remove the aluminum plate. This indication occurs because, when the bubbling is in the rolling compound, the air surrounding it cannot be fully compressed and squeezed out. A very thin layer of air prevents the panel from adhering completely in the middle. These infusibles could be either plastic particles or contaminants combined with plastic. Compared to polyethylene, these plastics have a far higher melting point. They are blocked on the side of the stainless steel wire mesh and cannot melt in the barrel. It will raise the extrusion back pressure to some degree, breaking the filter and causing it to be extruded together, which will cause the core plate to bubble.
A specific quantity of stainless steel wire meshes must be used for filtering when making thin plates. To filter aluminum-plastic core plates and prevent puncture, a specific hole plate with a pore size significantly smaller than the plate thickness can be used. This usually solves the bubbling issue with aluminum composite panels.
This type of issue will arise in some small factories without prior production experience, but Julong, our factory, which has over 20 years of rich production experience and specializes in the production of aluminum composite panels, will never make such a low-level error. Customers choose quality and peace of mind when they choose Julong, for this reason.
An aluminum composite panel is a novel material that is created by combining polyethylene and polypropylene as the core layer with a surface-treated and coated aluminum coil as the surface.
Because the aluminum composite panel is made of two materials—metal and non-metal—with entirely different properties, it not only preserves the key features of the original component materials—metal aluminum and non-metal polyethylene plastic—but also overcomes their drawbacks to obtain a variety of excellent material properties, including luxury, eye-catching decoration, resistance to weather, corrosion, impact, fire, moisture, sound, and heat insulation, as well as ease of processing, forming, transportation, and installation. These qualities have made a wide range of applications possible for aluminum composite panels. Although aluminum composite panel production appears straightforward to the uninitiated, it is a novel product with significant technical components, which presents certain technical challenges for quality control. Related prodcut: Digital Printing Aluminum Composite Panel.
The following primarily discusses the variables influencing the aluminum composite panel's 180° peel strength.
While heat treatment is one factor, some manufacturers and plates of aluminum lack stringent quality control when utilizing recycled aluminum scrap.
The composite quality of aluminum composite panels is directly correlated with the cleaning and layering quality of aluminum coils. Before the polymer film can form a strong bond, the aluminum coil needs to be cleaned to get rid of any surface oil and contaminants and create a thick chemical layer. Unfortunately, during the pretreatment process, some manufacturers do not strictly control the temperature, concentration, treatment time, and renewal of the treatment liquid, which has an impact on the cleaning quality. Even using the aluminum plate straight out of the package without any pretreatment will eventually result in unstable composites with low 180° peel strength.
PE has the best bonding between polymer film and plastic because it is inexpensive, non-toxic, and simple to process. PE is thus the primary material. Some small manufacturers cut costs by using PVC, which has a poor bonding effect and burns to produce deadly poisonous gas, or by using recycled PE materials or PE raw materials mixed with lower-quality materials. Due to varying PE types, aging levels, etc., this will produce varying composite temperatures, and the final surface will have unstable composite quality.
Polymer membrane is a type of bonding material with unique properties, and it is the primary factor influencing the quality of the composite. The polymer film is co-extruded with three layers and has two sides. The middle layer is the PE substrate, and the two sides have entirely different properties. One side is bonded to metal, and the other is bonded to PE. Self-dissolving inferior polymer membranes can produce false composites if they are not fully melted. While the strength is high in the beginning and lasts for a long time, weathering and even bubbling or cracking will cause the strength to decrease.
Shear strength, peeling strength, penetration resistance, bending strength, bending elastic modulus, and other mechanical characteristics are among the primary characteristics of aluminum composite panels. These serve as crucial performance and reliability indicators for aluminum composite panels and serve as a foundation for structural design.
Aluminum composite panels are primarily used for road signs, advertising signs, curtain walls, and outdoor and interior decoration. Of these, the curtain wall panel—also referred to as the suspended wall—is the building's external maintenance element. It primarily supports its weight as well as the loads caused by wind, temperature, and action, rather than the main structure's weight.
