The thickness and flatness of aluminum foil light-proof self-sealing bag directly affect its performance and application effect. It is very important to accurately control these two indicators in the production process.
First of all, the selection and pretreatment of raw materials are the basic links. The purity and manufacturing process of raw materials of high-quality and uniform thickness aluminum foil coils will affect the subsequent processing. Before putting it into production, the aluminum foil is strictly inspected and pretreated, such as cleaning surface impurities and oxides to ensure that the initial state of the aluminum foil is good, providing a stable basis for accurate control of thickness and flatness.
In the composite process, the lamination parameters of each layer of material must be accurately controlled. For the case where aluminum foil is composited with other plastic films to form a self-sealing bag, the pressure, temperature and speed of the composite equipment are adjusted to make the layers of material evenly laminated together to avoid uneven thickness. For example, the advanced extrusion composite process is used to accurately control the screw speed and extrusion volume of the extruder to ensure the uniform thickness of the plastic coating, thereby ensuring the thickness consistency of the entire bag.
The stretching process is also a key step. When stretching aluminum foil, precise control of the stretch ratio and stretching temperature can adjust the microstructure and mechanical properties of the foil, thereby affecting its thickness and flatness. Too high a stretch ratio may cause the foil to become thin and uneven, while too low a stretch ratio may not achieve the required physical properties. Through experiments and data analysis, the optimal stretching parameters are determined so that the foil can achieve good performance while maintaining precise control of thickness and flatness.
In the bag making process, the design and manufacturing accuracy of the mold have an important impact on the flatness of the bag. High-precision molds can ensure that the shape of the bag is regular, the edges are neat, and wrinkles and deformation are avoided. At the same time, the tension control system of the bag making equipment is optimized to ensure that the aluminum foil is subjected to uniform tension during the processing process to prevent thickness and flatness problems caused by uneven tension.
Quality inspection and feedback adjustment are important means to ensure thickness and flatness. High-precision thickness measuring instruments and flatness detection equipment are used to monitor the aluminum foil and finished bags in the production process in real time to detect deviations in thickness and flatness in a timely manner. Once a problem is detected, the production process parameters are adjusted immediately to form a closed-loop quality control system to ensure the stability and consistency of product quality.
In addition, the control of the production environment cannot be ignored. Keep the temperature and humidity of the workshop stable to avoid environmental factors affecting the performance of aluminum foil and other materials, thereby indirectly affecting the thickness and flatness of the bag. For example, high humidity may cause the aluminum foil to get damp, affecting its processing performance and the flatness of the final product.
Through strict screening of raw materials, precise control of composite processes, optimization of stretching processes, upgrading of bag-making molds and equipment, strengthening of quality inspection and feedback, and stable control of the production environment, the thickness and flatness can be accurately controlled in the production process of aluminum foil light-proof self-sealing bag, the product quality can be improved, and the application needs in different fields can be met.
