Water-based coating of the "inherent"

Product has its unique water-based coating, the cover for the saddle class, in particular, thin cover of water-based coating will not wet curls. At the same time it also has: the production of less demanding appropriate for high-volume production line; investment cost is not high, integrated and low cost, affordable. The most noteworthy is that it is not easy to pollute the environment, are environment-friendly products, is the development direction of the coating, will be in a specific product in place. A solution to the current water-based glue flaws, its prospects are bright. However, there are inherent characteristics of its own, in a number of products to be used with caution.

    1. Not suitable for large area (especially the big field) coated graphic products

    Water-based coating of glue with some water, used for large area (especially the big field) laminating the graphic product, it will show in a larger graphic surface area of ​​the snowflake-like spots, thus affecting the appearance quality of the product . Although increasing the amount of sizing is also changed much, but to use oil or hot thermal lamination process instead.

    2 easy sizing of paper for offset

    I have used different parts, manufacturers of water-based coating glue batch of pilot production, oil in particular, with the two-component glue coating comparison, in offset coating on paper products, water-based coated paper and plastic products is likely to result out, sometimes gently tear, film and printing completely separate, easily lead to quality problems.

    3 double-sided coated products with caution

    Some products due to customer requests should be double-sided coated, water-based coating process, such as production, because of its higher water content within the adhesive, after printing laminating is difficult to quickly evaporate the water, resulting in weak crystal India, less than customer requirements, the quality of unexpected incidents.

    4 After the coating process is not easy to bump

    Of water-based coating products for embossing process will produce in its contact surface white, bow wrinkle, not a solid paste, in severe blistering, performance is more prominent on the coated paper. We can focus some of the Binding book covers, water-based adhesive coated side of the cover after the bar line is not very straight, there was uneven pressure like prints, seriously affect the appearance of the product.

    5 follow-up processing to wait too long to prepare

    Water-based coating products shall be divided by the large sheet of 24-48h of the flat shape. Sometimes by 40-500 degrees to flow under the baking process of construction. The main purpose is to glue the moisture evaporates, the adhesive strength and stability of the coated product stiffness. And sometimes have some special aid to meet finishing requirements.

    A product to save costs, cover the use of 105gm2 sided coated paper. The water-based single-sided lamination, the cover is too soft at the same time easy to produce static adhesion. 72h and the use of baking powder-coated light method, also failed to solve the disc can not be perfect binder on the cover of the automatic transmission failure. Finally came up with trick: put it in the -40 degree freezer frozen, frozen 2h, become straight, then have a certain stiffness of the package on the perfect binder, barely complete production tasks.

    6 color printing graphic

    Mainly in large areas of spot color printing to laminating, such as the Indian gold, silver ink water-based coating products for the unexpected will happen after the color change. The reason for this is because the glue in some of the chemicals and water and gold ink (containing more copper) or silver ink (containing aluminum more) due to chemical reaction. At this time only change the coating process, using technology instead of oil or hot laminating film.