The influence of temperature and humidity of boiled bag
The high temperature and high humidity season in summer is the frequent period of dry composite coating quality accidents of two-component polyurethane adhesive. According to an adhesive factory, 95% of the quality feedback received in summer is related to the non drying of the adhesive layer. In the environment of high temperature and humidity, the water content in the air is very high, and it is easy to enter the rubber tray through the volatilization of acetic acid and acetic acid to consume the curing agent, which makes the ratio of the main agent and curing agent unbalanced, resulting in the incomplete crosslinking and wrinkling phenomenon of the adhesive layer when boiling.
If there is no condition to control the temperature and humidity of the workshop, the following points should be paid attention to in the high temperature and humidity season in summer
① By detecting the temperature and humidity of the environment and the temperature above the rubber tray and solvent barrel, the "dew point" phenomenon can be avoided. Once the "dew point" appears, it means that a large amount of moisture in the air enters into the rubber tray, and the rubber layer is easy to dry.
② During the production arrangement, the water boiled bag should avoid the high humidity period for compound processing.
③ The compound ethyl acetate barrel and glue circulation barrel should be sealed with cover. If the semi closed rubber plate is used, the influence of environmental humidity can be further reduced.
Expand knowledge: packaging film manufacturers introduce the status of pigment particles
When making ink, when adding pigments, fillers and other materials, the evaporation rate of solvent is greatly reduced. The finer the pigment particles and the larger the surface area, the slower the solvent volatilization. www.dgbpk.com/
Dongguan Beite packaging materials Co., Ltd
Dongguan special bag, plastic bag, plastic bag, plastic bag