Foaming on the surface of the finished product after a period of time, especially at the edges and corners, is more likely to occur. This is mainly due to improper
compression, in addition, the lack of adhesion of adhesives will also appear foaming phenomenon. Therefore, in the production process should be carefully pressed, not to map the output without pressing or pressing carefully, it is best to match with a good quality foaming machine, in addition, the selection of adhesives with strong adhesion will reduce the pressing time and increase production. Deep rubber marks appear on the surface of finished products, which affect the beauty of the products. This is mainly
because the glue is too thick or the size of the adhesives is too coarse and the leveling is not good. Therefore, the use of adhesives with fine gum, good leveling and strong initial adhesion can make the adhesives thin and uniform, which can not only make the products beautiful, but also reduce the amount of adhesives and achieve cost-saving effect. 10. Any gift box glue has an optimal bonding time. If the best bonding time is missed, false bonding or non-sticking will occur. Therefore, when making gift boxes with complex technology, glue with long opening time should be selected. If the process can not be completed in open time, it is better to brush a certain amount of glue and then bond. Because gift box glue should consider the adhesion of film, it tends to be non-polar, so the adhesion of gray board is sometimes inferior to that of ordinary white latex.
In addition, because the surface of the ash board is not flat, and there are even a lot of dust, it is necessary to bond the glue in the wet state, so that the glue can penetrate the
substrate very well. Otherwise, there will be false adhesion or only a few fibers on the surface.