Guiding Systems

Application of Web Guiding System in PRE-Coating Industry

The pre-coated film first appeared in the American GBC company in the 1980s. It was quickly promoted because of its advantages of simple use, environmental protection, safety, low labor cost, good after-covering effect and high production efficiency. Domestic pre-coated films began to appear in 1998. The introduction of American GBC products by Kangdexin was promoted and sold in China, and Kangdexin started the research and development and technical reserve of related products since then. In 2002, it built the first domestic production line and created the domestic pre-coating film industry. And lead the development of the pre-coated film industry to this day. At present, there are more than 100 various coating production lines in our country, with an annual output of about 400,000 tons. The domestic product is thinner and the EVA coatings used are over 180,000 tons.

There is still a huge gap between the use of domestic pre-coated film and Europe and the United States. Now the proportion of pre-coated film in the film market is less than 30%, and there is still huge room for development; and in the context of China becoming a manufacturing power, the product The market demand for packaging materials is increasing; with the upgrading of China's manufacturing industry, the packaging quality requirements of products are becoming more and more beautiful, the products of film coating will be more and more, and the film coating market will become more and more large; The level is constantly improving, China's environmental protection requirements, labor costs are getting higher and higher, the subsequent processing of laminating products is more and more complicated, some simple peritoneal processes will be eliminated, and the demand for pre-coated films is increasing. The market share of the film market will be higher and higher.

At present, China's pre-coating film production technology began to develop from the first generation to the second generation; the first generation consists of the substrate primer EVA, the second generation consists of the substrate EVA; compared to the first generation, the second The generation products are more efficient, better in quality, more widely used, and there is also the need to help pre-coating films to replace other film products in the future.

In recent years, with the advancement of technology and changes in market demand, pre-coated films have also begun to develop in new directions, and the following new trends have emerged:

First, the development of digital printing film technology

Digital printing Because a lot of printed ink contains a lot of silicone oil, it brings great difficulty to the bonding of the pre-coated film. In 2005, GBC Company of the United States pioneered the digital pre-coating film. Digital film now has digital AGB film, digital NEW film, digital cleaning film and so on. At present, digital film has occupied a large application field in the world. Domestically, it has developed rapidly from scratch. Due to the birth of digital technology, pre-coated film began to serve in the digital printing industry. This is the general coating process. Uncoated film technology.

Second, the emergence of special pre-coating films is increasing

Special pre-coating film requires higher adhesion and can adapt to more changes of printing materials, making the printed matter more beautiful after covering, and has more development space for subsequent processing; currently special film development products: such as soft surface Precoat film, nylon precoat film, scratch precoat film, tackified precoat film, laser precoat film, embossed film, screw film, chemical treatment film, and the like.

Third, the pre-coated film has already stepped out of the field of packaging and began to develop into new fields.

In the field of building insulation, a new type of pre-coating film-metal pre-coating film and aluminized pre-coating film are widely used. This product is suitable for use and has the functions of heat preservation, radiation resistance, fire prevention and waterproofing; for example, in the field of building insulation in the United States. The foam board is coated on both sides and coated with a metal pre-coating film to resist radiation, and a BOPP pre-coating film or BOPET pre-coating film is coated on the side. In the process of manufacturing pre-coated film, we can carry out special treatment, such as adding special additives in the resin - anti-UV masterbatch, flame retardant, etc., prolong the aging time of the film, improve the ignition point of the material, make the film incombustible Or difficult to burn. Thus, the foamed sheets on both sides of the film can be waterproof, more heat-resistant, resistant to radiation, and also reduce fire hazards. If this product is listed in China, it will be promising in the Chinese construction market.

Pre-coating capacity is the peak production period from June to December, and the output can reach two-thirds of the annual production. In 2013, as various types of coating material production lines are also constantly increasing, the number of EVA coating materials will also increase. Therefore, the use of coating materials in the second half of 2013 will also be greatly improved. As a pioneer, Europe and the United States today are often China's tomorrow. From this point of view, the production of domestic pre-coated film is still growing rapidly, and the demand for EVA coatings will increase significantly.

The PRE guiding system adopts an integrated design, is compact in structure, and is supplied to the user in components. Therefore, the user is extremely easy to install and therefore can serve the pre-coated film industry well.

It adopts the guiding shaft positioning and rotating structure, and has the characteristics of high precision, good rigidity and small deformation. It is widely used in the guiding of pre-coated film materials.

The correcting system comprises a set of servo drives and a set of guiding mechanisms, wherein the guiding mechanism is driven by the driving device to move in a specific trajectory, so that the strip material passing through the guiding mechanism changes its lateral position due to the lateral frictional force and the cross-sectional tension distribution. change.

Main Features:

1. Mainly used in pre-coated film, label printing, sanitary products, packaging industry;

2. The aviation plug is connected, which is convenient and safe;

3. A large number of aluminum alloy materials are used to effectively reduce the driving inertia and reduce the response time;

4. Special guide rail design makes the moving parts highly connected, stable and vibration-free.

5. Optional infrared or ultrasonic sensor;

6. Specially designed motion trajectory optimizes material guiding.

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