The classification of coated paper not only reflects the progress and diversity of materials science, but also reflects the differentiated needs of different industries for functional paper!
Mar 26,2023
There are various classification methods of coated paper, one of which is more intuitive is to distinguish it according to whether it contains plastic coating, that is, there are two categories of plastic release paper and non-plastic release paper. To further refine, we can also divide the coated paper into silicone release paper and non-silicon release paper according to the type of release agent used. This classification standard is mainly based on the difference of release agent composition, which has a direct impact on the performance and application field of the product.
In the category of plastic coated paper, due to the use of the release agent often has a certain penetration ability, if the paper surface is not properly blocked, these release agents may penetrate into the inside of the paper, and then cause a series of problems. The first thing is that the curing effect is not ideal, which is manifested as the coating is not fully cured, which affects the stability and durability of the product. In addition, the penetration phenomenon also leads to a significant increase in the use of release agents, which not only increases the material consumption in the production process, but also directly pushes up the production cost and reduces the economic benefits. Therefore, in order to overcome these problems, the industry generally adopts the method of plastic coating on the surface of the paper, which is vividly called "laminating". In China, polyethylene (PE) particles have become the preferred material for coating treatment due to their good processability and cost-effectiveness. Generally, there are certain requirements for the melt index of PE particles, which is controlled at about 7 to ensure the uniformity and adhesion of the coating layer. Among the domestic PE particles, the 1C 7A model of Yanshan Petrochemical is widely favored by the market because of its excellent performance and stable quality. According to the different layers of the film, plastic film paper can be divided into single plastic release paper and double plastic release paper, the latter is often better in anti-permeability and durability.
On the other hand, plastic-free release paper has attracted the attention of specific fields with its unique material and process. This kind of paper mainly includes Glassine paper, CCK, etc., which have excellent release performance and surface characteristics through specific chemical treatment or physical modification. These plastic-free release paper in the increasingly stringent environmental requirements today, because it does not contain plastic components and highly respected, widely used in food packaging, pharmaceutical packaging and other areas of high material safety requirements. At the same time, they also with its unique surface structure and good processing adaptability, to meet the electronics, automotive and other industrial fields of precision die cutting and pasting operations of high standards.
In summary, the classification of coated paper not only reflects the progress and diversity of materials science, but also reflects the differentiated needs of different industries for functional paper. Whether it is the pursuit of cost-effective plastic coated paper, or pay attention to environmental performance of plastic release paper, in their respective fields play an irreplaceable role.
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The company is a paper-based, double-layer, multi-layer paper-plastic film composite-based, engaged in printing industry and consumer goods packaging materials semi-finished products and product processing, mainly producing a variety of disposable paper cups, catering boxes, paper bowls, paper dishes and other high value-added environmental protection paper products manufacturers.
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