What Materials Will Be Used In The Production Of Rubber Bending Rolls?

Rubber bending rolls use wild rubber and film during the production process, and the film is a common production process for packaging and printing products. Generally, after the film is coated, it can not only achieve waterproof, antifouling, heat resistance, light resistance, abrasion resistance, but also improve or reduce the brightness of the surface of the product, so that the product can adapt to the requirements of different situations. The products made by the film are usually trimmed or die-cut before they become products. Therefore, this requires that the film product should not be deformed and have a good flatness, so as to ensure the quality of the finished product.

1 Printing rubber bending roller mainly transfers ink on the offset printing machine. Therefore, the daily cleaning of the rubber roller must be carefully cleaned, otherwise the surface layer of the rubber roller and the pigment and resin are easily oxidized to form a smooth and hard film, which causes the surface to be vitrified and affects the ink transfer. If it is not cleaned frequently, the surface of the rubber roller will be affected by unevenness. Therefore, the rubber roller should be washed and put back for use during shutdown.

2 In the offset printing operation, the ink is emulsified due to "large water and large ink", and a hydrophilic foundation is formed on the smooth rubber roller to deink the ink. The solution is to remove the emulsifying ink, wash the deinking roller with gasoline, mix it with pumice powder with 5% sodium hydroxide solution, and treat the metal roller (or hard roller) accordingly. The hard roller can also be sanded with fine water sand in the state of water spray. Be careful not to stay in the same place, otherwise the rubber roller will be damaged. The fundamental method is to control the pH of the water hopper and do a good job of water and ink balance.

3 rubber roller used for a long time aging, coupled with the erosion of chemicals, causing rotten rubber to drop "slag", such rubber roller is best not to use, otherwise it will seriously affect the quality of printed products.

4 In order to ensure that production and printing quality are not affected, there must be spare ink rollers, but do not store too much to avoid aging. The rubber roller is stored in the same environment as the blanket. In addition, the rubber roller should be straight and straight at the journal, and the surfaces should not touch each other or contact with other items to avoid deformation of the rubber roller.

5 Rubber rollers should not be stored in close proximity to large motors and generators. Because the large amount of ozone generated by these devices causes the surface of the rubber roller to age and crack. 6. When the weather is cold, the ink is not evenly distributed. It is appropriate to add auxiliary materials to the ink. It is forbidden to bake the ink roller with equipment such as infrared heaters to prevent oxidation of the rubber roller.

Originally, these film-forming glues accumulated on the rubber roller were transferred from the "void" portion of the film (that is, the portion where the partial film was not covered by the printed sheet) in the case of inaccurate transfer of the paper, and it was adhered over time. The amount of the film accumulated on the rubber roller is gradually increased, and the viscosity is also increased. Thus, to a certain extent, during the laminating process, the laminating glue accumulated on the rubber roller produces a certain tensile strength to the printed sheet, and this "pull" is exactly opposite to the "paper-feeding" direction of the laminated sheet. Then, at the moment of rolling under the high-speed condition of the coated sheet, the partial tensile deformation of the covered sheet is caused by the partial adhesive force of the coating rubber on the rubber roller, which is mainly manifested by the appearance of the paper surface. Obvious bumps and bumps, and even curling, resulting in inaccurate trimming or die-cutting specifications.