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First, the role of film in the later stage of inkjet printer works
1. Laminating originated in the printing industry. Laminating is also called post-press lamination, post-press laminating or post-press lamination. It is the surface processing technology of printed works. As a process for protecting and decorating the surface of printed matter, it originated in the printing industry. When you walk into any bookstore, you will see that most book covers use this laminating method. In addition, all kinds of packaging and decoration prints, calendars, maps, etc. can be seen in its application. This laminating process that entered China in the 1980s quickly became a paper surface treatment due to its practicality and advantages of N. Important way.
2. The way of surface treatment of inkjet printers after printing In the late 1990s, the rise of inkjet printers, the surface treatment after printing showed a situation of blooming flowers. Plastic packaging and cold lamination have become mainstream. With the popularization of digitalization, laminating, laminating, UV coating, etc. have also appeared in the inkjet industry. 3. The role of post-printing surface treatment of inkjet printers The products through post-printing surface treatment are mainly strengthened in many aspects such as vision, feel, waterproof, fade resistance, etc., that is to say, it mainly plays a role of protection and decoration. It is said that after the surface treatment after printing, the business card will be more firm, and the grade of the product has been improved.
Second, the respective characteristics of commonly used inkjet printer post-print surface treatment methods
The post-printing surface treatment methods of inkjet printers are diverse and new technologies and new materials are emerging in an endless stream. However, at present, the main methods commonly used for post-printing surface treatment of inkjet printers are four methods: laminating, plastic sealing, cold laminating, and laminating.
1. Lamination
Laminating is to apply a special liquid evenly on the surface of the printed paper and then cure it. It is handled by a special laminating machine. The characteristics of the laminating are:
A. Good quality The film has strong adhesion fastness, no foam, good sealing performance, and the surface is like a mirror surface.
B. Low cost It belongs to the cheapest surface treatment cost of post-printing paper, and even costs less than one yuan per square meter of material.
C. The operation is simple. There is no post-production work after the coating, no edge strips are left, there is no cutting work, and a lot of labor is saved. It is the first choice for mass production.
D. High price also requires special venues. There are many types of laminating machines, but the equipment is expensive and the volume is large. It requires a separate operation site.
2. Cold mounting
Cold lamination is a processing method of pasting a film with glue on the back to the surface of the printed paper, usually by means of a cold laminator. Its characteristics are:
A. Fast speed It belongs to the fastest way of surface treatment of paper after printing.
B. Strong adaptability Whether the printed paper is wide, narrow, long or short, all visitors will not refuse.
C. It can provide a variety of surface effects. There are many types of cold laminating films. In addition to the difference between high gloss and matt, what other matte, laser, gold powder, etc. can make the treated paper surface more diverse.
D. The equipment is simple and cheap. The cold laminator is cheap and does not need electricity when in use.
E. Average quality After all, it is glued, so the cold mounting quality is average. Especially after cold mounting, if the paper is curled and then unfolded, bubbles and wrinkles may appear. Single-sided cold mounting also makes the paper curl easily.
F. It is easy to age and shrink. It is not suitable for long-term storage and not to mention the quality problems of the cold laminating film. Even the relatively good cold laminating film on the market has problems of aging and shrinkage, which is not conducive to long-term storage. Long-term preserved photos must not be cold mounted.
3. Plastic packaging
Plastic packaging is to use a double-layer soft film to sandwich the printed paper, and then heat the plastic packaging machine to bond the four sides of the film to form a processing method to seal the paper in it. Plastic packaging has the following characteristics:
A. The equipment is simple and cheap. At present, most of them are within A3 format, and the price is cheap.
B. Simple operation Only a few switches and a temperature knob, the operation is very simple.
C. Multi-purpose machine The plastic packaging machine can be used for cold lamination and even lamination-free cards and peritoneum in addition to plastic packaging.
D. The photo after plastic packaging is very firm. The film after plastic packaging becomes hard and brittle so that it cannot be curled. The work forms a hard board to make it play a role in the production of badges, hang tags, etc. A major method of processing.
E. The quality is very limited by the plastic film. The quality of the plastic seal is average. After being heated, the plastic film adheres to the surface of the paper but is not close. That is to say, the plastic film and the paper cannot be completely pasted together. After a certain period of time, air may enter the plastic bag, so the decoration and The protective effect is also general.
F. Easy to age The plastic film becomes hard after heating, and cannot be folded or curled, so it is not suitable for large format. The plastic film is also subject to temperature changes, and it is fragile if it is too cold.
4. Hot film
The meaning of lamination can be understood as the post-processing technology of paper-plastic integration, including plastic packaging and cold lamination. The laminating in the narrow sense refers to the thermal laminating machine.
Thermal laminating machine can be divided into two major categories of instant coating laminating machine and pre-coating laminating machine. Instant coating laminating machine includes three parts: gluing, drying and hot pressing. It has a wide application range and stable and reliable processing performance. It is currently widely used in China. Instant coating laminating machine is mainly used for factory mass continuous production, the machine is also very large. The pre-coating laminating machine has no gluing and drying parts, small size, low cost, flexible and convenient operation. It is not only suitable for laminating processing of large quantities of printed products, but also suitable for laminating processing of small batches and scattered printed products such as automated desktop office systems. The machine is small in size and can be used on the desktop. The pre-coating laminator can be used for cold watch in addition to the peritoneum. The abdominal laminator mentioned later in this article refers to this kind of hot coating using a pre-coating film. Film machine.
This type of hot laminating machine uses a film pre-applied with a layer of similar hot sol, which is completely combined with the surface of the paper through high temperature and certain pressure. The film used is called a hot film and the equipment used is called a hot film machine or a hot film. machine. Hot film machine can also be used for cold lamination, so it is also called laminating machine. The hot film is generally double-sided, that is, both the front and back of the paper must be coated. When nothing is coated, the front and back of the paper are completed at one time.
The difference between the hot film and the plastic packaging is mainly the difference in the film. The plastic packaging mainly seals the edges around the film. The film and the paper surface are not completely pasted, but rely on the seal, so the plastic film is in the form of a single double layer. Sandwiched in the middle of the double-layer film for plastic sealing), the film used for the hot film is thinner and softer, relying on the intimate combination with the surface of the paper and packaged in a roll form. The characteristics of the hot film are mainly reflected in:
A. The high-quality thermal film is completely combined with the paper, without the entry of air, and the double-sided film prevents the paper from deforming due to the shrinkage of the film, which basically eliminates the phenomenon of wrinkles, bubbles, and shedding, making the quality of the film appear. Better.
B. Low cost Even if the double-sided film is also cheaper than the cost of single-sided cold lamination, the paper after the hot film is not as hard as the plastic film, and the paper still has flexibility and can be curled.
C. It can provide a variety of surface effects to increase the appearance. In addition to the calendering film and high-gloss film, there are also various patterned films with special effects on the surface to increase the appearance of the thermal film.
D. Wider use. After the heat film, there is a film on both sides of the paper. The paper has better flexibility and the corners are less likely to be torn. It is often used for picture books, photo albums, recipes, etc. The best way to handle the film
E. Simple operation and low waste rate. The hot film machine has the functions of pause, temperature adjustment and speed adjustment. It is relatively simple to operate, and uses pre-coated film in a roll, continuous operation, high production efficiency, and low waste rate in the film.
F. The post-peritoneal treatment is troublesome. After the lamination, the excess hot film will be left around the paper and need to be removed manually, which is a lot of work and it is troublesome.
G. Not suitable for a small amount of operation. The start-up and shutdown time of the hot film machine is slow. If there are only a few or a small amount of film, the time is too long, because the hot film machine needs about 20 minutes of preheating to start, and the temperature before the shutdown is also reduced. needs time.
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