Pu Jialing talks about the development and trend of inkjet printing
The first is Kodak ’s thermal CTP. Kodak ’s plate-making machine has a thermal sensitivity of 300 sheets / second. This is not easy. The reason why it can do this is that it uses a special sensitivity thermal plate, which is about 70 millijoules, which is much higher than the traditional one. In addition, the total power of its two sets of lasers can reach 45 watts, which is probably much higher than many current thermal laser heads. This is why it can achieve such a high speed.
Today I will mainly talk about inkjet technology and its development trend.
1. The technical highlights of Drupa in 2008.
Second, the characteristics of inkjet imaging technology.
3. The development of inkjet imaging technology.
4. Application fields and development trends.
When we talk about Drupa, we still want to show you from a big perspective. You must know the direction of technological development in the industry. If you do n’t know this, if you look at it, you will find everything. As He Yong told you just now, their folding technology is very fancy. When I went to their booth to see the folding machine, it was basically dazzled and very professional.
To show you the overall technical development trend of the printing industry. Speaking of the excessiveness of our country, it is to say goodbye to lead and fire, walk through light and electricity, and move towards 0 and 1. That is, through the analog era and the analog + digital era, we are moving towards the digital era.
What does CIP / CIM stand for?
We talk about CIM or CIP is the application of computer integrated manufacturing technology in the field of printing. Among the few manufacturers mentioned today, all talk about digital workflow without exception. In fact, digital workflow is just a content produced by the computer. Secondly, you can see the automation of printing equipment, including the equipment after printing, one emphasizes automation and the other emphasizes digitization. To realize the integrated production of computers, there is no automation without printing machines. Secondly, you can also see the integration of various information systems. KBA and Heidelberg [special topics, products, encyclopedias] have all shown this to you. The integration of this information system has exceeded our imagination. In fact, it has put the control information of the printing production level and the management information of the printing production design and the enterprise resource information and business information we are involved in. We are talking about three levels The information is integrated into a whole, which is also very worth seeing. It may be that different manufacturers provide different products. Everyone is similar, but they are all working hard in this direction. The fourth thing worth watching is the integration of production management. Everyone is talking about some concepts of CIP3 and CIP4, which are all developing in this aspect.
There is also a CTP. In CTP, I mainly want to talk to you about one of the technical foundations that on-demand printing depends on, namely digital printing.
There are many digital printings, but two are the most important. One is a toner-based imaging system and technology, as well as an inkjet imaging-based system and technology, so all I talk about today is based on inkjet imaging digital printing technology. This future development may be beyond our expectation, it has a huge development. [next]
Why take this question? Looking at the previous exhibitions of CTP Druba, I can see that I used the last four exhibitions as examples.
From the disappearance of the CEPS technology from the 1970s to the late 1990s, until the rise of the CTF technology in the 1980s to the disappearance of this technology today, to the rise of the CTP in the early 1990s and the current vigorous development, as well as the development of CIM computer integration technology The key to the development of these technologies. For example, Drupa 95, although it was not called CTP drupa at the beginning, but probably from 95 drupa, CTP moved from the laboratory to the industrial application. Everyone attributed it to this first year.
The 2000 exhibition actually continued the 95-year technology development trend. They had more to show and propose as a highlight.
But 04, which is also one of the few Drupa's first themes proposed before the show, is JDF. The essence of JDF is a very important content in the field of printing computer applications. At that exhibition, it was clearly called JDF Drupa. At that time, some experts estimated that what kind of drupa in 2008 would look like? Some people talk about ink-jet drupa. Why did you give everyone a question mark? I also highly admire myself and often agree with this. But in fact, computer integrated production, including a lot of content involved, like JDF, digital processes are also a lot of highlights on the extension line. So maybe this time there is such a theme, maybe there is no such sign. But whether it is or not, from what I just said, you can see that four of the six manufacturers this morning involved inkjet technology. Everyone can see that inkjet technology, regardless of whether it is written or not, should become a very important highlight of Druba in 2008, which is very worth seeing.
In addition to this, there are the CIM technology and its related technologies just mentioned, because of the time relationship, I will not show it to everyone. Only show the situation of inkjet technology.
Let me talk about the characteristics of inkjet imaging technology.
Everyone is familiar, but it seems not familiar. To talk about this, the easiest way is to compare it with the electrostatic photography technology of toner and traditional printing technology. Both electrophotography and inkjet do not rely on pressure. The pressure between the imaging medium and the imaging medium is equal to zero, but electrophotography has a distance, and its distance is not equal to zero. This distance is very small, generally not exceeding one millimeter. But the distance of inkjet imaging is very large, even reaching 1 cm. To distinguish these three different essential differences, the characteristics of inkjet printing are clear at a glance. [next]
First, it is versionless. Its imaging process must be digital.
Secondly, there is no pressure. It can be imaged on media with different materials and mechanical strength. This is also not possible with traditional printing.
Third, non-contact. You can image on flat or curved media with different thicknesses. Can be imaged on media of different formats. So, let's take a look at the development process of inkjet.
The development time of inkjet is very short. In the 1960s, the concept of inkjet was proposed. By the 1970s, continuous and on-demand injection technologies and systems began to appear. In the 1980s, the hot bubble inkjet technology and system appeared. The 1990s should be the era of the fastest development of inkjet technology in the printing field. It has been widely used in various fields of printing, even in printing. Applications in other fields have also begun. What if inkjet develops in this century? Inkjet is considered to be special printing so far. In the new century, inkjet may become a basic printing method.
At present, inkjet is classified in terms of classification. One is the continuous injection type, and the other is the on-demand injection type. The inkjet technology used in our industrial printing systems is a continuous jet type. The smaller ones are all on-demand jet types.
At present, in our field, these two categories dominate. One is a piezoelectric crystal, and there is also a thermal bubble method, and electrostatic attraction. If the inkjet technology is classified, it is such a classification method.
Inkjet technology, in fact, its nozzle is very simple, the composition of the nozzle is varied. Basically, different nozzles can be used in one integration, and there are many ways to arrange them. Its system is composed of two types, one is called single-head inkjet system, in fact, it realizes the entire format printing by its nozzle mechanical movement and round-trip movement.
There is also a way to make the nozzle into a linear array. Because its main scanning method is not implemented mechanically, but electronically. The speed of such a system is very high, and even the speed is very amazing.
For example, at present, such a small format system, the maximum speed can reach 2000 per minute. This speed is very fast.
To sum up the current arrangement of nozzles and technological development, in terms of imaging speed, today is probably at such a level.
One is large format and another is small format. The level of large format is currently close to about 1,000 square meters per hour, which is the current high-speed system. Then the future development may exceed 2000 square meters, or even reach a spray speed of 3000 square meters. Of course, this goal is still far away.
For small format, the current highest speed can achieve 2,000 sheets per minute, which is very fast. It is likely that there will be development in the future, but unfortunately, no one has made such a prediction in my survey data. But the current 2000 sheets should be very fast. This system should be widely used in the printing of data services.
Assuming its resolution, it is connected to the size of the ink droplets. From the 1970s, it has been listed until the beginning of this century. Probably the size of the ink droplet has dropped from more than 100 picoliters to the sub-microliter today, which is 1000 times lower. Its resolution has also reached hundreds of DPIs from dozens of DPIs at that time, and it can produce all grades of printing brands. After Yaweisheng, is it still necessary to improve? This depends on the application. [next]
If we sum up this, its development trend is such a trend.
From dozens of DPIs to more than 2400 DPIs today, its purpose size is very small, and this purpose size is inconsistent with the inkjet speed. But currently it can do this possibility. This is probably the development trend of resolution in the inkjet field. This picture tells everyone that inkjet technology can adapt to all print quality requirements.
We look at the inkjet ink and its development trend. Inkjet inks are actually two kinds.
One is defined as non-full solid ink. There is also a kind of solid ink.
Among non-full-solid inks, they are divided into water-based inks. Dedicated to the imaging medium. There is also a solvent ink, which is volatile and dry, and has a wide range of imaging media.
You can see its ink composition is simple. Water-based inks use pigments or dyes as couplers, and its main raw material is water. After this water penetrates, the ink is required to be fixed on the surface. If your hand is like the medium and it can't be absorbed by each other at all, you can't achieve good quality. To make ink flow on top and solvent on top, this must be matched. If not, good quality cannot be obtained.
There is also an ink called full solid content ink. There are two kinds. One used is called phase change ink, also known as fixed ink, it does not need to evaporate and penetrate things. Its composition is very simple, the main linking agent is a low-melting polymer. It does not need to be dried in this way, and the drying speed is very fast. There is also UV ink. It was just developed at the beginning of this century. The main constituent linker is the prepolymer + monomer + initiator, which may be imaged on a substantially unrestricted substrate. Its biggest feature is the vast expansion of the substrate or image-receiving medium.
In terms of ink systems, this is probably the case. If you sum up this, the current development trend is like this: from the development of water-based ink to the era of coexistence of water-based ink and solvent ink, today it has developed into the era of coexistence of water-based ink + solvent ink + ultraviolet ink, but ultraviolet ink It is a developing trend, because the imaging medium after ultraviolet ink is no longer restricted. Therefore, except for air, water can be sprayed, and water pressure can be used for printing. Its image-receiving medium is greatly expanded, such as paper, plastic, metal, ceramics, glass, fabric, and even water. The image medium is basically unlimited. This is also a very important trend in the development of inkjet.
Finally, to show you its application areas and its development trends.
The application fields of inkjet are probably the following. In fact, to summarize it, the field of printing is ubiquitous, and the field of non-printing is constantly developing its own imaging. There are probably so few typical ones.
1. Large format color printing. This was first made by screen printing or even large-format offset printing. Basically, these things are not applicable in this field. All are painted in large format color. Into a monopoly.
2. Mainstream of home / office digital color output terminal. There are two options for this terminal, one is toner, and the other is inkjet. It can be said that inkjet printing is the mainstream method.
3. Mainstream of digital color proofing (including contract proofing). This is basically a monopolistic mainstream position in our country.
4. The main technology used in high-speed variable digital printing. This toner is a good performance, but inkjet will also be a trend.
5. The main technology used in the output of digital color photos. Now it is silver salt photosensitive paper with laser scanning equipment for processing. But after the development, digital inkjet will probably become the most mainstream device. Now many manufacturers, such as Epson. HP is competing desperately in this field, because this market will undergo radical changes in the future, and everyone hopes to occupy a place in this market in the future.
6. Textile printing. This field has been used for a long time, and there should be great development in the future.
7. In other areas that we have thought of and have not thought of, maybe inkjet will work.
In summary, how important is inkjet technology? So far, we have always regarded inkjet technology as a special printing method. Perhaps in the future, it may become a basic printing method in this century, and it will play its greatest role in printing and printing-related fields.
So inkjet technology, including the computer integrated production technology that I talked about earlier, is one of the biggest highlights of our drupa this time. You may see that different manufacturers can display different devices.
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