Approaching pre-coating: the mainstay of coating technology

[Extended]: On the development and application of pre-coating technology

[Extended]: A brief introduction to the technological process of pre-coating film

[Extended]: Detailed description of the structure of pre-coated film and the characteristics of pre-coated film products

[Extension]: On the difference between the pre-coating film and the immediate coating film coating process

Pre-coated film refers to the process of pre-gluing and rewinding plastic film before compounding with paper prints. It is first applied by the pre-coating film processing plant according to the different format of the application of the glue on the film and rewinded for the choice of the manufacturer, and then combined with the printed matter. Laminating, that is, sticking film, is the processing technology of coating plastic film with adhesive, and heating and pressurizing the paper print to make it bond together to form a paper-plastic integrated product. The film-covered printed matter has a thin and transparent plastic film on the surface, which makes the surface smoother and brighter, thereby improving the gloss and fastness of the printed matter. The graphics and text are brighter in color and rich in three-dimensional sense. Antifouling, abrasion resistance, folding resistance, chemical corrosion resistance, etc.

In the 1950s and 1960s, BOPET (biaxially stretched polyester), BOPP (biaxially stretched polypropylene), BOPA (biaxially stretched nylon) and other film products were born one after another, which quickly led to the transformation of the packaging material industry. This was born. The solvent-based instant coating technology was invented by the United States in the late 1950s. The solvent-based instant coating glue blended with benzene solvent was applied to the film by using special instant coating film equipment. Laminating technology for printed materials. The film-covered packaging is beautiful and durable, so that the solvent-based instant coating technology has been rapidly promoted.

[Extended reading]: On the development and application of pre-coating technology

In recent years, the coating is basically a pre-coated film. Due to the short time of use and the many problems that occur, according to process practice, the main factors affecting the quality of the pre-coating film are temperature and pressure. The three factors of speed, so correctly handling the relationship between the three is critical to ensure the quality of the pre-coating film and the impact on the production of the next process.

Paper-plastic coating will be the comprehensive result of the physical function of hot pressing. Temperature, pressure and speed are the three basic factors to achieve this physical comprehensive effect. Correctly handling the relationship between these three is the key to the process operation technology.

The technological process of pre-coating film is roughly as follows: paper conveying at the paper conveying station-printing film pressing and collecting finished product.


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