Briefly describe the development and characteristics of aluminum-plastic composite panels

First, aluminum composite panel introduction

Aluminum-plastic composite panel is actually the abbreviation of aluminum-plastic composite panel. The aluminum-plastic composite panel is a lightweight wall decoration material which is composed of an inner and outer two-sided aluminum alloy plate, a low-density polyethylene core layer and an adhesive composite. As a new type of building materials, aluminum-plastic panels are widely used in exterior wall decoration, signboards, display panels, advertising billboards, building partitions, decorative panels for interior walls, etc.

Second, the development of aluminum-plastic composite panels

The production of aluminum-plastic composite panels in China began in the 1990s. After nearly 10 years of development, significant progress has been made in market recognition, production, variety, process, quality, standards, and applications. According to incomplete statistics, since 1998, the annual output of aluminum-plastic composite panels has increased by nearly 30%. By 2002, the annual output of aluminum-plastic composite panels has exceeded 50 million square meters, with an annual output value of more than 10 billion yuan, and has formed a certain scale of export capacity. It can be said that aluminum-plastic composite panels have flourished as an industry in China.

The aluminum-plastic composite panel can be divided into two types, outdoor and indoor, and can be divided into fireproof and general type. Nowadays, a large number of products are sold in the market. The outdoor aluminum-plastic composite board is O. 5mm aluminum plate (generally pure aluminum plate), the middle interlayer is PE (polyethylene) or PVC (polyvinyl chloride), the interlayer thickness is 3-5mm. The middle interlayer of fireproof aluminum-plastic composite board is FR (fireproof plastic). The outdoor composite aluminum composite panel has a thickness of 4-6 mm. The aluminum-plastic panel for indoor use is generally 0.2-O.25mm aluminum plate, the thickness of the interlayer is 2.5-3mm, and the thickness of the indoor aluminum-plastic plate is 3-4mm. The standard specifications of aluminum composite panel products are generally 1220 (width) x 2440 (length) x thickness, and the width can also reach 1250 or 1500 mm. The outermost thickness of the outdoor is usually 4mm, and the thickness of the room is 3mm. If the intermediate interlayer of the aluminum-plastic composite panel is PVC (polyvinyl chloride), the composite panel will generate chlorine (toxic gas) when it is heated, which is very dangerous. There are individual manufacturers who are not responsible. It is wrong to think that the inner aluminum plate of the aluminum-plastic composite board is placed indoors, and the thickness is not big. The thickness of the inner surface aluminum plate is deliberately reduced to 0.42 or 0.3mm, and even more. What's more, these people only look at the practical point of view, and they do not realize that the rigidity and strength of the entire aluminum-plastic composite panel are significantly reduced after the inner surface aluminum plate is thinned, which is not allowed. Some aluminum-plastic composite panels are less than 0.5mm, about 0.45mm, which is a product that cut corners.

Third, the characteristics of aluminum-plastic composite panels

The board surface is flat, the color is uniform, the color difference is small (directional), the body is light, and it has certain rigidity and strength. Because the surface of the board is made of fluorocarbon paint, it can resist acid and alkali corrosion, powder resistance and ultraviolet radiation resistance. The advantages of discoloration, etc., but unlike some manuals, "easy to process, there are simple woodworking tools that can be processed on site", this is not realistic. Generally, the aluminum-plastic panel can't be fireproof. When the surface encounters high temperature, the aluminum plate will bubble. If the 0.5mm aluminum plate encounters fire, it will melt easily. The middle interlayer PE and PVC will burn, emitting harmful gas and suffocating. Danger. Aluminum-plastic composite panels are widely used in various aspects due to their excellent characteristics. For example: renovation of old buildings in the curtain wall of the building (low-rise), decoration of a large number of street shops, interior decoration, interior pillars, partitions of indoor office rooms, furniture, interior decoration of vehicles, etc. In order to reduce the light pollution of the large-area hidden frame glass curtain wall, the composite panel strip curtain wall is used in the opaque portion of the low-rise curtain wall to reduce the large-area mirror effect of the hidden frame glass curtain wall.

Why can't aluminum-plastic composite panels be used in high-rise buildings? The main reasons are: 1. Considering the strength production structure, the bending edge of the composite panel is only 0.5mm aluminum plate strength; The high quality aluminum-plastic composite board has a service life of 10-20 years, which is difficult to replace at the upper level; More importantly, the plastic is sandwiched between the two layers of aluminum, and the plastic is a poor electrical conductor and is not lightning-proof. In addition, high-voltage lightning will penetrate a very thin 0.5mm aluminum plate. Photographs on foreign brands of aluminum-plastic panels are rarely seen at the top.

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