The hottest factors affecting 180 peel strength of

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Factors affecting the 180 ° peel strength of aluminum-plastic composite plate

aluminum-plastic composite plate is a new decorative material, which has been rapidly developed and widely used at home and abroad because of its strong decoration, rich colors, durability, light weight, easy processing and other characteristics

the production of aluminum-plastic composite board is very simple in the eyes of outsiders, but in fact it is a new product with high technical content, so there are certain technical difficulties in the quality control of aluminum-plastic board products. This lecture mainly talks about the factors that affect the 180 ° peel strength of aluminum-plastic composite plates

quality problem of aluminum foil itself. Although this is a relatively hidden problem, it has been reflected in the quality of aluminum-plastic plate. On the one hand, it is the heat treatment process of aluminum materials. On the other hand, some aluminum plates and producers do not have strict quality control when using recycled waste aluminum. This requires the producers of aluminum-plastic plates to evaluate the material producers in all aspects and establish business contacts to ensure the quality of materials after determining qualified subcontractors

pretreatment of aluminum plate. The cleaning and coating quality of aluminum plate are directly related to the composite quality of aluminum plastic plate. Jinan experimental machine factory of the first aluminum plate is a leader in Jinan. First, it needs to be cleaned to remove the oil and impurities on the surface, so that a dense chemical layer can be formed on the surface, so as to facilitate the good bonding of the polymer film. However, some manufacturers also operate a mold workshop, a product development laboratory and a number of experimental processing production lines during the pre-treatment process, which affect the cleaning quality. What's more, some new manufacturers directly use aluminum plates without any pretreatment. All these will inevitably lead to poor composite quality, low 180 ° peel strength or instability

selection of core material. Because the bonding effect of polymer film and PE is the best compared with other plastics, and the price is moderate, non-toxic and easy to process. Therefore, PE is selected as the core material. In order to reduce costs, some small manufacturers choose PVC with poor bonding effect and fatal toxic gas will be produced when burning, or choose PE recycled materials or PE raw materials mixed with waste materials. This will lead to different composite temperatures due to different PE models and aging degrees, and the final surface is unstable composite quality

selection of polymer membrane. Polymer film is a kind of bonding material with special properties, which is the main factor affecting the composite quality. The polymer film has two sides and is formed by CO extrusion of three layers. (3) The green side of plastic additives products is bonded with metal, the other side is bonded with PE, and the middle layer is PE substrate. The properties of both sides are completely different. There is a wide gap in the price of materials on both sides. The materials bonded with aluminum plate stores need to be imported and are expensive. However, the materials with PE fusion surface can be produced in China, so some polymer film manufacturers make a big fuss about this, and use a large number of PE fusion materials to cut corners and make huge profits. The use of polymer membrane is directional, and the front and back sides cannot be replaced. Polymer membrane is a self dissolving membrane, and incomplete melting will lead to false recombination in 2012. In the early stage, the strength is high, and over time, due to the influence of weathering, the strength will be reduced, and even bubbling or glue opening will occur

the above points are summarized from long-term production practice for peer reference

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