Aluminum foil coating method
2017/2/4 10:39:45
Most of the aluminum foil coating equipment using anilox roller coating device, it is known as the textured coating method. Anilox roll is composed of net hole, mesh wall, roll concave point is usually called the net hole, the high part is called the net wall or network cable. Anilox roll after processing a layer of 0.015 ~ 0.02 mm thickness of the hard chrome plating, in order to increase the surface hardness of anilox, the hardness value H RC62-65.
When coating with an aluminum foil coating apparatus, the anilox roller works by rotating the anilox roll when the adhesive is filled with the cavities of the anilox roll, and when the netting leaves the adhesive liquid surface, The liquid at the surface smooth is scraped off by a scraper, leaving only the liquid that is not scraped in the cells. The liquid (adhesive) is in contact with the surface of the coated aluminum foil substrate. This contact is effected by the action of a resilient rubber pressure roller so that a portion of the binder solution in the cell is transferred to the surface of the aluminum foil substrate.
Because the adhesive has fluidity, it will slowly and automatically on the aluminum foil surface leveling, so that the original discontinuous liquid into a continuous uniform liquid layer. The liquid in the anilox roller mesh is partly transferred to the aluminum foil, while the anilox roll is rotating at the same time, and is re-immersed in the adhesive liquid after one revolution, and the liquid adhesive fills the cell , This cycle. An anilox roller with a small diameter can continuously and uniformly transfer the binder solution to the aluminum foil substrate without any interruption so that the surface of the aluminum foil can be uniformly coated with the adhesive.
Obviously, if the anilox roller per unit area of the network cable is less, the deeper the hole, the coating amount is greater; when the anilox roller number is higher, the more shallow network, the less full of adhesive , The coating amount is relatively small.
In addition, the anilox roller mesh shape is different, the coating amount is not so. For example, 200 pyramid-type anilox rolls, i.e., 200 mesh cells per inch, and about 8 mesh cells per millimeter, and the binder has a storage capacity of about 0.5 pounds per square inch, or 24 grams per square meter. While the 24-delta-thread form has an adhesive stock of 13 pounds per square foot, or 63 grams per square meter.