No matter whether it is manual or automatic mechanical mounting of the color surface font, the amount of glue should not be too large. In actual production, some employees in order to avoid degumming artificially increase the amount of glue.
Must be strictly controlled. The coating amount should be 80-110g / m2. However, it is advisable to adjust the size of the corrugation and control the amount of glue to evenly coat the flute peaks.
The smaller the amount, the better.
    The author only considers the quality requirements of corn starch, which is one of the main raw materials for rubber production, and the water ratio of starch gum.
The degree of ash is 98-100 mesh, the ash content does not exceed 0.1%; the water content is 14.0%; the acidity is 20CC / 100g; the sulfur dioxide is 0.004%; the smell is normal; the color is white or slightly yellow.
    If the quality of the gelatinized starch does not meet this standard for digital printing, the water ratio can be appropriately reduced according to the situation. When the temperature rises, the water ratio should be reduced accordingly. Borax and protopine should be increased as appropriate.
The amount of oxygen water should be reduced. After the cooked rubber is made, it should not be put on the offset printing for a long time, especially in summer, it is best to use it as it is. Add 3% -4% formaldehyde, 0.1% each of glycerin and boric acid to the glue solution to increase the resistance
Water capacity, speed up the bonding speed, and enhance the rigidity of the cardboard.
    Most of the carton production now uses homemade or purchased corn starch glue. High-quality corn glue not only has good bonding strength, but also enhances the pressure and strength of the cardboard.
Printers patrol, and the cabinet is not easy to deform. The quality of corn starch gum is closely related to the manufacturing process, environment, quality of raw and auxiliary materials, stirring time, etc.
Speak.
    In addition, environmentally-friendly chemical adhesives, that is, PVA adhesives, can also be used when mounting sticker boards. It is characterized by flat, straight, corrugated cardboard, offset, and no deformation.
, Its production method is (taking 100kg adhesive as an example): material ratio: 13.7kg of polyvinyl alcohol, 2.74kg of polyvinyl acetate emulsion, 1.37kg of oxalic acid, 82kg of water and 1: 6 water ratio
). First heat the water to 90 ° C, add polyethylene glycol and stir well, continue heating to boiling water, keep warm for 3 hours, add oxalic acid and stir, and finally add polyvinyl acetate
Stir the emulsion evenly.