Discussion on several mainstream processes of non-

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Talking about several mainstream processes of non-woven bag printing

non woven bag generally adopts silk printing process, which is often referred to as silk printing, which has always been a common printing process for many manufacturers. Generally, it is printed manually, so the color control in the process is not easy to control. However, with the continuous improvement of customers' requirements for the exquisite degree of product printing and environmental protection, many new non-woven bag printing methods have emerged, mainly including watermark, gravure printing and heat transfer printing

here we introduce the mainstream non-woven bag printing method in the current market

first, watermark

is named because it uses water-based elastic glue as the printing medium. It is common in textile printing, also known as printing. When printing, mix the color paste with water-based elastic glue. When developing printing plates, chemical solvents are not used, and they can be directly washed with water. It is characterized by good coloring power, strong covering and fastness, water washing resistance, and basically no odor

second, gravure printing

the finished products processed by this method are usually called laminated non-woven bags. This process is divided into two steps, that is, the traditional gravure printing process is used to print the pictures and texts on the film, and then the film with the pattern is compounded on the non-woven fabric by the film covering process. This process is generally used for non-woven bags printed with large-area color patterns. It is characterized by exquisite printing, machine production throughout the process, and short production cycle. In addition, the product has excellent waterproof performance, and the durability of the finished product is also better than that of non-woven bags produced by other processes. There are two kinds of films available: bright and matte. Matte has sanding effect. Disadvantages: the fuel economy can be improved by 5%, which is in conflict with the concept of environmental protection, because the film is difficult to degrade

III. heat transfer printing

heat transfer printing belongs to special printing in printing. This method requires an intermediate medium, that is, the image and text are first printed on the heat transfer film or heat transfer paper, and then the pattern is transferred to the non-woven fabric by heating the transfer equipment. The commonly used medium in textile printing is heat transfer film. Its advantages are: exquisite printing, rich layered edition, comparable to photos. Suitable for small area color image printing. The disadvantage is high price and high printing cost

IV. printing characteristics of non-woven bag silk

1 It is not limited by the size and shape of the substrate. Generally, printing can only be carried out on the plane, while silk screen printing can not only print on the plane, but also on special shaped objects and concave and convex surfaces, but also print all kinds of super large advertising paintings, vertical curtains and curtains

2. The layout is soft and the impression is small. Silk screen printing plate is soft and elastic with small printing pressure, so it can not only print on soft substrates such as paper and textiles, but also on glass that is easy to be damaged under pressure Printing on ceramic vessels

3. Thick ink layer, strong coverage. The ink thickness of silk printing can reach 30 m ~ 100 m. therefore, the covering power of the ink is particularly strong, and it can be printed in pure white on all black paper. Silk printing has a thick ink layer and a strong three-dimensional sense of graphics and texts, which is unmatched by other printing methods

4. Suitable for all types of inks. The wide range of inks used in silk screen printing has gone beyond the definition of ordinary inks. In fact, some are slurry, plastic, paint, adhesive type or solid powder. Therefore, sometimes silk screen printing inks are collectively referred to as printing materials

5. Strong light resistance. In a broad sense, the classification of ink should be divided according to the type of printing plate, that is, relief ink, lithographic ink, gravure ink and filter ink. However, such classification has completed a total investment of 4.84 billion yuan in the principle of the project, which cannot express all the reality. In recent years, due to the increasing variety of inks, new designs and colors have appeared continuously. It is limited only to divide the version by using thermoplastic plastics (such as PVC)

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