Wuhan heat shrinkable film label manufacturer, product quality meets standards, cost-effective service, perfect service

Wuhan heat shrinkable film label manufacturer product quality meets the standard price, cost-effective service is perfect Release time: 2020-03-26 Wuhan heat shrink film label manufacturer product quality meets the standard price, cost-effective service is perfect, Wuhan Packaging Materials Co., Ltd. is a heat shrinkable film label, ops heat A professional manufacturer of shrink film labels, I searched on the Internet, and placed an order, the manufacturer’s service attitude is very good, the product quality is good, and it is worth having. The protective film is widely used, not only on mobile phones, but also for other purposes , But our understanding of this product is not very comprehensive. For example, regarding the drying process of the protective film adhesive, what effect will it have on the quality of the protective film? The drying process of the protective film adhesive refers to the coating on the base The process in which the solvent or water in the adhesive layer on the material volatilizes to solidify the adhesive. Since it always takes a certain amount of time for solvent or water to volatilize, drying is a relatively slow step in the production process of protective film. The drying speed not only determines the production speed but also greatly affects the quality of the product. Heat-sealing time The heat-sealing time of the automatic packaging machine or the old bag making machine is determined by the machine speed. When the heat-sealing temperature and heat-sealing pressure remain unchanged, the longer the heat-sealing time, the stronger the bond between the heat-sealing layers. However, if the heat-sealing time is too long, the heat-sealed parts of the composite film will be wrinkled and uneven, which will seriously affect the appearance quality of the product. Heat sealing pressure For the heat sealing strength of plastic composite flexible packaging, a certain heat sealing pressure is essential. Therefore, the heat sealing pressure is required to be moderate and uniform during the heat sealing process. If the heat-sealing pressure is not enough or uneven, bubbles will be generated in the heat-sealed part and false welding will result in poor heat-sealing. Packaging users not only pay attention to the beauty and logistics performance of the packaged products, but also pay attention to the heat-sealing strength of the packaged products. Because the heat sealing strength of packaged products directly affects the packaging speed, transportation and sales. In actual production, each manufacturer regards the heat-sealing strength as an important quality index to control whether it is bag-making products or coil products used in automatic packaging production lines. The following is a simple analysis of the factors that affect the heat-sealing strength of the heat shrinkable film based on the actual production experience. The heat-sealing temperature and the heat-sealing temperature directly affect the heat-sealing strength of the plastic composite packaging product. It meets the American PDA standard and can pack food. Moisture and dustproof. The packaging cost is low, which is better than that of carton and other materials. With the rapid development of food, cosmetics and medicine industries, the demand for plastic composite packaging products is increasing, and the quality requirements for plastic composite packaging products are getting higher and higher. Once the adhesive of the protective film is applied, the solvent will evaporate quickly before entering the dryer oven. However, due to the heat absorption of volatilization, the surface temperature of the adhesive layer is reduced, so the volatilization rate also decreases. When the protective film enters the oven, the heat absorbed by the solvent volatilization is supplemented by the heat conducted from the outside. When the heat reaches equilibrium, the adhesive layer The surface temperature and the volatilization rate of the solvent can also be kept constant. The viscosity and other rheological properties of the protective film adhesive are also factors that affect the coating process of the protective film. The greater the deviation of the rheological properties of the adhesive from the Newtonian fluid, the more likely to have various quality problems in the coating operation, especially when the adhesive exhibits swelling. In terms of properties, since its viscosity will increase rapidly with the increase of coating speed during the coating process, a greater mechanical force must be used to spread the adhesive. Therefore, the faster the coating speed, the more difficult it is to obtain a uniform coating. Previous: Four elements of printing quality control and detection methods