Advertising production industry bottomless paper laminating machine product application process.
Publish Time: 2020-04-15 Views:
Advertising industry has no bottom paper laminating machine product application technology, the improvement of printing substrate surface smoothness, printing and processing cycle shorten the paper moisture content increase and the ink completely dry and no residual solvent, and the wet glue coating composite process after production of the product still hold some content of organic solvents, making the strength of composite resin coated products more intensified.
To ensure that there is no pollution and high strength composite has become an inevitable reform of covering technology. The selection of solvent-free melting coating of hot melt adhesive pre-coated film (smell no smell, hand contact is not sticky) as a composite material, the use of hot pressing dry composite technology is the basic measure.
Standard operability on the surface tension of small pressure coated paper substrate coated film processing, to ensure that the adhesive has a better leveling. For the synthetic modified thermoplastic adhesive, only under the thermal condition of no less than 80℃, there is a better solid-liquid phase change, viscosifier resin, main adhesive resin can play a role. At this time the composite machinery to provide heat, but also composite substrate paper continued to absorb.
If the substrate quantitative large, compact, high humidity, ink printing layer thick, color heavy, the absorption of heat is greater. In addition to the thermal instability, uneven, less than the supply, the thermal energy of the adhesive attenuation. Therefore, the compound production process is often in the process of heating up. The temperature set during production operation should take into account the above several factors and the actual influence of various conditions such as temperature, humidity and air exchange energy of the production environment, which cause the decline of the composite heat. Generally, the lowest value of the compound setting temperature should not be lower than 85℃ and the highest value should not exceed 115℃. When the composite working pressure and workpiece running speed are determined and continuous production operation is conducted, the heating system should always be in the state of maintaining the temperature and the good brightness of the composite product is normal. The operation of the heating process that reaches the lowest value at the end of the set temperature should be avoided.
Laminating is hot pressing production. The guarantee of its heat, also need pressure. The working pressure should be 8 ~ 15Mpa. According to the basic conditions of the workpiece, the pressure supply can be appropriately increased, but should not be reduced.