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Pre-coating is a process of coating a film on the surface of the substrate, which can improve the surface quality and functionality of the product. By pre-coating a layer of film, the substrate can be effectively prevented from being corroded by the outside, and the wear resistance and corrosion resistance of the product can be enhanced. In addition, the pre-coating film can also improve the gloss and touch of the product, and improve the visual effect and user experience of the product.
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07
2024
Introduction of several advantages of pre-coated film pre-coated film
First, because the pre-coated film coating process does not produce any harmful substances, the pre-coated film coating process is more environmentally friendly. Second, the pre-coating film process is simple, and it is not necessary to adjust the glue solution like the coating film process before production. There is no need to control the amount of glue in the production process, and there is no need to dry the adhesive. Just control the temperature, pressure and speed, stop processing is relatively simple, no need to clean the glue coating mechanism. Third, in the production will not produce bubbles, wrinkles, film and other phenomena, therefore, the film product quality is higher. Fourth, the wide range of adaptation of laminating equipment, pre-coated laminating equipment or
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01
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15
2018
Industry trends for various substrates of pre-coated films
The main raw materials of the pre-coating film are BOPP film, EVA hot melt adhesive, BOPET film and LDPE hot melt adhesive. The development status of the industry is as follows: 1. BOPP film in BOPP industry is made of polypropylene particles that have been co-extruded and stretched vertically and horizontally, and is used as a substrate in the production of BOPP pre-coating film. The reason why BOPP film is widely used is mainly because the film itself is light, non-toxic, non-polluting, odorless, stable physical properties, good mechanical strength and air tightness, high transparency and gloss, good printing performance, and the production process Simple, time-saving, low pollution, and cheap.
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01
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15
2018
Pre-coating film industry development history and product classification
1. The development process of the pre-coated film industry is combined with the printed film and the film through professional laminating equipment to form a paper-plastic product. This technology is called laminating technology (lamination). After the film printed matter, the surface is more bright, smooth, the pattern is more vivid, wear resistance, folding resistance, tensile resistance, moisture resistance, chemical corrosion resistance and other properties have also been strengthened, and even some apparent defects in the printing process can be made up to a large extent, so not only the service life is prolonged, but also the aesthetics of the product is greatly improved. Since the birth of film technology in the 1950 s, film technology has experienced solvent-based
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15
2018
Pre-coating film relative to the more prominent advantages
If the pre-coating film is used for coating, it can effectively prevent bubbles or demoulding of the coated product. That is, the common point of foaming and stripping of film products processed by gluing wet composite process is that the film is separated from the matrix of paper printed matter, which destroys the tightness and smoothness of paper/plastic composite. Just different forms of expression. Blistering is the emergence of needle tips, rice grains, stripes, cracks and other shapes of local void. Delamination is a large area or the whole paper, plastic separation. Careful analysis of various manifestations of the accident cases, "film length", "glue hair sticky" is a basic law. The reason for the change of "film lengthening" and "adhesive hair" is that glue is applied.
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15
2018
Pre-coating film-green environmental protection printing new materials
The precoated film was born in the United States in the late 1980 s. Since its rise, its environmental protection, ease of operation, high safety and high efficiency have been recognized by people. China since the 90 s of last century began to introduce pre-coating technology, at that time, pre-coating film mostly by imports, the price is quite expensive, only a few domestic enterprises can process low-grade high temperature pre-coating film, which to a certain extent restricts the application and promotion of pre-coating film in China. At present, in the US film market, the pre-coated film accounts for 97% of the total film, and its market share in Japan and South Korea has reached 70%. In some countries and regions in South America and Africa, the pre-coated film accounts for 97% of the total film.
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15
2018
Common Problems and Solutions of BOPP Pre-coating Film
1. The product has wrinkles (1) The pressure of the rubber roller is too large, causing the film to deform, and the pressure should be reduced appropriately. (2) If the surface of the rubber roller is damaged or uneven, the rubber roller should be replaced. (3) The pressure between the rubber roller and the heating roller is unbalanced and should be properly adjusted. (4) The tension on both sides of the film is inconsistent, or there are wavy edges, the film material should be replaced. 2. The product has snowflake spots (1) The pressure of the rubber roller is not enough, and the pressure should be increased appropriately. (2) The glue on the pre-coated film is not completely melted, which can be solved by the following methods. ① Increase the film temperature appropriately. ② Increase the contact area between the film and the heating roller to make the phase
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01
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15
2018