The rise of pre-coated film technology and the factors restricting its development

The pre-coated film laminating process started from the United States in the late 1980s. When its advantages gradually emerged, it was soon recognized that the problem that often appeared in the country was printed matter. At present, in developed countries like the United States, the amount of pre-coated film is 150 million US dollars per year, and the amount of film equivalent is 1.5 billion square meters, about 40,000 tons; in most countries in Europe and Japan, Singapore, In countries and regions such as Hong Kong, China, the amount of pre-coated film also accounts for more than 60%; in some countries in South America and Africa, pre-coated film is also being gradually recognized and used by people. Therefore, the pre-coating film has become the main process of coating, which is an undoubted development fact.

The introduction of pre-coating film into China began in the 1990s. At that time, in addition to imported pre-coating film, only a few domestic companies could process low-grade high-temperature pre-coating film. Later, some people gradually produced pre-coating film by roller coating method. It was not until 2002 that China had the same pre-coated film products as the international market, and the number of manufacturing companies continued to increase. The annual output also reached the level of 10,000 tons. However, there is still some distance to realize the use of pollution-free pre-coated films in China soon. In the actual application process, the problem that often occurs in China at present is that after the printed products are coated with pre-coated films, rolling, bumping, Folding and die-cutting are prone to separation between the pre-coated film and the printed matter at the above-mentioned processed places. This phenomenon is commonly known as peeling. The main reason for the release is due to insufficient adhesion fastness between the pre-coating film and the printed matter.

In our country, the organic solvent precoating agent coating process (also known as oily coating film) process was first implemented in 1991. The first "Coated Film Quality Requirements and Inspection Methods" in 1991 was the standard for organic solvent coating A definition and requirement. In the development process of the next ten years, that is, the coating film process occupies most of the market of the Chinese coating process. After the pre-coating film process was born, due to its excellent surface effect, it often gave Operators and professionals have an illusion: even if the process requirements and conditions of the pre-coated film are not met, the apparent effect after coating is much better than that of coated film. At this time, the fastness of the coating (the bonding force between the pre-coated adhesive layer and the printed matter) is not large enough. Under such conditions, rolling lines and irregularities on the coated products are likely to cause filming problems.

It is the emergence of problems such as filming, which gives the industry an illusion. Why does the appearance of such a beautiful film sometimes not as good as the relatively poor, that is, the coating film has more post-processing advantages? The design of printed products, the raw materials used for printing (paper, ink), printing technology, laminating equipment, laminating technology, lack of environmental protection awareness, lack of health awareness, etc. The popularization and development of pre-coating film coating technology in China.

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