logo
Search
宏泰

LED UV curing ink will become the focus of future research and development

  • Categories:Industry News
  • Author:
  • Origin:
  • Time of issue:2017-03-27 15:23
  • Views:

(Summary description)The basic composition of UV ink is: prepolymer, active diluent, photoinitiator, pigment, auxiliary agent, etc. Prepolymers include: epoxy acrylate, polyester acrylate, urethane acrylate, modified acrylate, etc.

LED UV curing ink will become the focus of future research and development

(Summary description)The basic composition of UV ink is: prepolymer, active diluent, photoinitiator, pigment, auxiliary agent, etc. Prepolymers include: epoxy acrylate, polyester acrylate, urethane acrylate, modified acrylate, etc.

  • Categories:Industry News
  • Author:
  • Origin:
  • Time of issue:2017-03-27 15:23
  • Views:
Information

The basic composition of UV ink is: prepolymer, active diluent, photoinitiator, pigment, auxiliary agent, etc. Prepolymers include: epoxy acrylate, polyester acrylate, urethane acrylate, modified acrylate, etc. Reactive diluent has the function of adjusting system viscosity, curing speed and ink film performance after curing. It is divided into multifunctionality and monofunctionality. The principle of UV ink curing is that the photoinitiator absorbs radiation and forms free radicals, which initiates a cross-linking reaction between the prepolymer and the reactive diluent to form a high molecular polymer with a network structure, so that the liquid quickly becomes a solid.

At present, the light source of UV ink generally uses a high-pressure mercury lamp, and its strongest wavelength is 365nm. Years of application results show that UV curing technology is a highly efficient, energy-saving, economical, widely applicable and environmentally friendly technology. But there are some shortcomings: 1. UV mercury lamp has a limited service life. 2. UV mercury lamp consumes a lot of energy, and the effective use of energy is not high. Only about 20% of the input energy produces ultraviolet rays, while 20% is visible energy and 40% is heat, which is not suitable for heat-sensitive materials. 3. Although the UV mercury lamp has no VOC emissions for solvent-based inks, it is environmentally friendly and environmentally friendly. But there are also some hidden pollution. For example, the high pressure, high temperature and strong radiation of the mercury lamp can easily cause the surrounding oxygen molecules to chemically react to produce ozone. And ozone not only has an adverse effect on the atmosphere, but also has a greater impact on health.

Relatively speaking, LED UV light source has the following advantages:

1. Cold light source, no heat radiation, low surface temperature of the illuminated object. This feature does not deform the film during the exposure process of the liquid photosensitive solder resist ink, reduces the distortion of the image transfer, and can better ensure the consistency of the image and the image. It can solve the long-term thermal damage problem in the production of optical communication liquid crystals, and is especially suitable for occasions that require small temperature rises such as liquid crystal edge banding and film printing. The heat generation is small, which can solve the problem that the mercury lamp printing equipment heats up and the staff is unbearable. The LED light source emits high-purity single-band ultraviolet light with almost no infrared output. It is a cold light source, and the processed parts will not be affected by Deformed by heat.

2. High efficiency. The LED light energy is highly concentrated in a certain ultraviolet spectrum with effective curing effect, and the actual use effect is comparable to that of a traditional high-pressure mercury lamp UV light source with a light intensity of 1000-2000mw/cm. Therefore, the curing time is shortened. The traditional mercury lamp looks very bright, but the heat is very high, because its spectrum is very wide, the UV spectrum that is really effective for curing only occupies a part of the energy, and a considerable part of it is lost in the visible range and infrared. The degree of spectrum (causing heat generation) is serious to the operator's eyes and is likely to cause thermal deformation of the processed workpiece.

3. Super long life. The service life of the LED lamp is more than 10 times that of the traditional mercury lamp, and the service life is not affected by the number of times of switching.

4. The response (switching) time is fast. The LED lamp does not need to be preheated, and can be printed immediately after turning on the lamp, and the productivity can be improved.

5. High security. The LED lamp has no UVC rays, no ozone is released, and it is not easy to break.

6. High stability. The printing quality of UV inkjet printers is closely related to the process of UV drying and curing. The stability of the LED lamp makes the output energy predictable and stable, so the printing effect is also predictable and stable. LED makes the ink deep-cured, and the wavelength of the light emitted by the LED lamp is 395nm, which can make the ink deep-cured, so it will not happen that the surface of the printed product is dry but the bottom layer is not dry. Printing on various media has strong adhesion and scratch resistance.

7. Low energy consumption. The power of the LED lamp is extremely low, only equivalent to 10%-20% of the UV mercury lamp.

Due to the advantages of LED curing light sources, the development of LED curing inks has become the direction of research and development in the current UV ink industry. When developing LED curing inks, the first thing to consider is the compatibility with the photoinitiator. A factor that must be considered when choosing a photoinitiator is that the absorption spectrum of the photoinitiator matches the emission spectrum of the light source.

The second thing to consider is compatibility with pigments. With respect to the emission wavelength of the LED, since the UV ink contains pigments and the like and the absorption wavelength of the photoinitiator overlaps, the curing characteristics become extremely poor compared to transparent varnishes without pigments. Compared with the conventional UV ink, the LED curing type must choose a pigment with good penetrability (small absorption) for the specific UV light wavelength used.

In addition, the choice of prepolymer and reactive monomer is also very important.

At present, LED curing devices are gradually entering the market, so LED UV curing inks will gradually replace traditional UV curing inks. The development and improvement of LED curing inks will be the focus of future research and development.

Related news

  • Sustainable innovation + "national tide" become a new trend in the CMF industry? 500+ industry elites actively discuss new directions and needs in the industry
    According to surveys, more than 90% of consumers will consciously take sustainable impact into consideration, and more than half of consumers have made it clear that they are willing to pay a premium for sustainable products. "Sustainable" is being paid attention to by more and more people. In this context, on November 24, 2020, the "2020 (Ninth) CMF Summit Forum" hosted by Xuncaiwenma® and co-organized by Guangdong Industrial Design Association and ATOT was held in Shenzhen. With the theme of "Sustainable Innovation", the forum attracted more than 500 well-known CMF designers and industry professionals from terminal brands, materials technology, product innovation companies, universities, research institutions, etc. at home and abroad to discuss sustainable innovation trends. Directions, new product development requirements and material technology solutions.      Warm atmosphere at the summit 01, the organizer's speech Speaker: Xuncaiwenmao® Innovative Materials Hall, He Jie   He Jie, the curator of XunMaWNL® Creative Materials Museum, said that 2020 is an extraordinary year. The epidemic will have a serious impact on the global economy, especially the manufacturing industry. But at this moment when opportunities and challenges coexist, the CMF design community has keenly discovered a new trend-sustainable innovation. As the starting point of the manufacturing industry chain, material technology should further promote the concept of sustainability. It is understood that as a one-stop service platform for materials solutions, Xuncaiwenliang® is committed to promoting the effective integration of new materials production, teaching, research and application, creating an "Internet + new materials" connection platform for the materials industry and manufacturing industry, and creating innovative and entrepreneurial The "Double Creation" service platform aims to improve efficiency, reduce costs, promote innovation, and optimize resources for the manufacturing industry. 02, "Pantone Pantone New Direction of Color" Speaker: Pantone Huang Lei China Business Development Manager      "One of the biggest adjustments this year is that we have introduced 315 new colors related to the market, which are mainly used in clothing, home and interior decoration, and industrial design to lead the trend in these markets." As an authoritative organization that specializes in the development and research of color, which is well-known worldwide, Pantone's new colors and color interpretation can always cause a new trend in the design world. Huang Lei said that the representative color of the year in 2020 is classic blue, and the color series that Pantone has added the most color this year is also blue. After interpreting the 315 new colors, Huang Lei emphatically mentioned the new opportunities that the epidemic has brought to Pantone. "Affected by the epidemic, many foreign companies and companies have begun to work from home, and we believe that this kind of workplace change is not temporary or temporary. Google, Microsoft, Twitter, and Apple have announced that working from home may be a new work normal. However, for work that requires color processing, home office is affected by environmental conditions such as lighting conditions, design tools, and other environmental conditions. Colors are prone to inaccurate colors, leading to time waste, cost waste, and material waste." In response, Pantone has launched a free digital application system, Pantone Connect, suitable for home office. "It is a set of design tools that integrates physical and digital workflows. The selected colors can be used simultaneously on the computer, mobile and Adobe design software, and all Pantone Pantone can be seen in this software. Color library." 03, "Data Management of Product Color and Appearance" Speaker: X-Rite (Shanghai) Color Technology Co., Ltd. Liu Yu, Chief Engineer      "How to accurately describe, reproduce, and deliver the desired color effect? ​​It has always been a big problem between design and production. How to objectively evaluate the proofing effect while saving proofing time and cost? It has always been one of the brand owners and material suppliers. A big problem in the time." Liu Yu said that due to the influence of various factors such as light source, surface texture of objects, product size, environment, color blindness and color weakness of the human eye, there will always be some deviations in the color that people see with the naked eye, and after transmission and reproduction Even more deviations will be uncontrollable. The mission of X-Rite is to minimize the deviation and improve production efficiency through the digital management of color. According to Liu Yu, as a color management company in the global supply chain, X-Rite has a well-known color management solution for various industries, and in the past two years, it has once again launched a black technology-a full-look scanning s
  • Life is gorgeous because of youth, youth is wonderful because of sports 2020-11-24
  • Hao Zhimin: Thoughts on the development of organic pigments in China 2020-10-09
  • Why did Samsung dare to use a plastic case on the flagship machine? The original secret is here~ 2020-08-19
  • Samsung's flagship phone uses a plastic back cover to attract heated discussions. Can plastic enter the high-end mobile phone market? 2020-08-07
  • In 2020, the Yixing Symposium of the Radiation Curing Committee was successfully held 2020-07-25

Contact

 

Hipro Polymer Materials(Jiangsu)Co.,Ltd.
Address: NORTH INDUSTRIAL DISTRICT (NANCAO VILLIAGE),WANSHI TOWN,WUXI, YIXING, JIANGSU, CHINA
Sales Line:
0510-87855326
Fax:0510-87855629
Technical Line:
0510-87856185
Dr. Office:0510-87856290
Website:www.hiprocoating.com

Page Copyright© HIPRO POLYMER MATERIALS (JIANGSU) CO., LTD.   苏公网安备32028202000906号   苏ICP备11044518号-2  Powered by www.300.cn