Composite flexible packaging production environment by reason of bubble and solution

Dry type composite is a dry type composite equipment, use glue to two or more films together made from composite flexible packaging process. In plastic composite flexible packaging, the dry type composite is one of the most commonly used methods of production, due to the choice of substrate surface is broad, compound high strength, convenient for printing and production advantages of fast speed and its important status in the packaging industry. But in the dry type composite products, often can appear bubbles, affect the product not only beautiful, but also affect the composite membrane oxygen resistance, permeability resistance and peel strength, this problem has long been plagued by flexible packaging production enterprises. The cause of the bubble, there are many, including the production environment, membrane material, adhesive, coating, drying process, composite, curing, etc. , almost in every link in production factors have led to bubbles appear. Here introduces production environment on the influence of air bubbles. When the environment temperature is too high, easy to muddy white two-component adhesives, viscous, coating properties, which result in producing composite flexible packaging bubbles. While the low temperature lead to adhesive dispersion is bad, wettability and adhesion of film were not so good, can also lead to the generation of air bubbles. In general the workshop temperature control must be in 18 ~ 25 ℃. Environmental humidity is too high, More than 70%) Will happen, in the anilox roll and rubber roll phenomenon of condensate water, water react with curing agent will produce carbon dioxide, eventually lead to air bubbles. Besides plastic film easy absorption of moisture in the air, especially the hygroscopicity of plastic film, such as nylon and cellophane, compound formed bubbles. To keep the relative humidity of 60% ~ 70% advisable. Air contains a lot of dust and impurity particles, the particles adsorbed on the plastic film, or fall on the applicator roll, a composite roller, glue solution could lead to the generation of air bubbles. , therefore, be sure to keep the workshop clean, health, reduce dust in the air, and should be regularly swept path, and try to keep the shop good sealing condition. Of course, in addition to the production environment, there are many reasons that cause composite flexible packaging of air bubbles, to the specific circumstances, specific analysis.