Solvent free composite due to the special coating mechanism and glue process, so the glue and temperature of each brand will affect the product quality, so pay attention to the temperature of each section, that is, pay attention to the product quality.
1、 Temperature of rubber barrel
The temperature of glue will greatly affect the viscosity of glue, and the viscosity of glue will seriously affect the coating effect. Because the speed of the equipment is too fast, too much glue is used per unit time, and the glue pipeline is too short, so the temperature of the rubber bucket is particularly important.
The temperature of the rubber storage barrel will be seriously affected by the heating mode, such as the bottom heating and the heating around the barrel. Due to the different installation methods of the heating devices, the heating performance will be different. Generally, the bottom heating is more uniform, it will form convection between the heated glue and the upper glue, and the effect is good, but generally the preheating time is long, and there is a slight overshoot in the initial stage.
However, the bottom temperature of the barrel is easily different from the surrounding temperature, so it is widely used in the early heating system.
In addition, the position of the rubber outlet and the position of the thermometer have a great relationship with the temperature of the rubber barrel. Therefore, the temperature accuracy in the barrel is generally ± 2 ℃, which can ensure the coating process of glue.
2、 Temperature of hose
The accuracy of the temperature of the rubber conveying pipe is very important, which is generally within ± 1 ℃. However, the temperature of the rubber conveying pipe is closely related to the heating mode, the heat preservation mode and the temperature measurement method, which usually plays an auxiliary role, and even has a greater relationship with the conveying amount and the material of the rubber conveying pipe. Therefore, it is very important to study the material, heat preservation material, heating method, temperature measurement method and control mode of the hose.
3、 Temperature of coating section
The temperature of glue is determined by measuring roller, transfer steel roller, glue conveying temperature and glue amount. This temperature is very important, it affects the uniformity of coating and the leveling of glue, and affects the composite quality of products.
The material with good heat transfer performance and small thermal expansion coefficient shall be selected for metering roll and transfer roll, and special flow channel shall be adopted to fully ensure the temperature difference between two sections. At the same time, attention should be paid to the importance of constant temperature of the water heater. The water heater must have fast heating, strong overheat protection function and water pressure under pressure protection function.
The coating roller is finally transferred to the substrate, so in addition to its structural rationality, it must also have an independent water heater heating system. Especially in cities with low temperature in winter, in order to ensure that the temperature of the coating roller is transferred by the base material, the solvent-free laminating machine is best placed in a constant temperature workshop. Generally speaking, the temperature of the coating roller is slightly higher than that of the metering roller in the constant temperature workshop.
4、 Composite cloth temperature
The temperature of the compound roller is different from that of the glue. Generally, there is no problem within ± 3 ℃. However, attention must be paid to the process requirements of glue. It can enhance the secondary leveling of glue, and has certain influence on the uniformity and transparency of glue.
Generally, the temperature of water cooling roller is different, as long as it is even.
5、 Temperature of production workshop
The environment temperature of production workshop has a great influence on the quality of products, especially in winter. Therefore, the constant temperature of the environment is an important factor to ensure the product quality.
6、 Ripening temperature
Curing temperature is an important condition to ensure the curing of products. First of all, when curing, the base material must not be suspended by external force, while maintaining a constant temperature. At present, solvent-free glue is generally low-temperature aging. In summer, it can be cured at room temperature, and in winter, it is put into the curing room for ripening.
In a word, mastering the temperature of each stage is beneficial to transparency, peeling strength, white spots, aluminum plating transfer and bubbles. Attention to temperature is equal to quality.
Dongguan Beite packaging materials Co., Ltd. - located in Dongguan City, a world famous manufacturing city, is a subsidiary company of Beite packaging (China) Co., Ltd
With an area of 6000 square meters, it is a flexible packaging enterprise integrating R & D, production and sales. It has a complete set of advanced production equipment in China
We provide customers with high-quality products and first-class service with the support of the humanized management system and a group of experienced technical personnel.
The company produces composite bags, roll film, fruit bags, aluminum foil bags, suction mouth bags, self-supporting bags, zipper bags, anti-static bags, special-shaped bags, etc., which are suitable for food, daily chemicals, and other special-shaped bags
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