Process application of the hottest vegetable ink

2022-07-27
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Process application of vegetable inks

inks are the main consumables in the printing industry. They can be divided into several types according to the ink composition and content, the purpose of the substrate, the printing method and use method of the printing equipment. Most of the existing inks contain organic (or D machine) solvents, pigments, etc., which do not meet the requirements of environmental protection and green printing. Nowadays, with the improvement of people's awareness of environmental protection and the growing voice of environmental protection, ink, as the main component of green printing, has increasingly enhanced its environmental requirements. The amount of printing ink suitable for environmental protection is increasing year by year. Environmental protection has become the only way for future ink development. Let's talk about the characteristics and applications of green and environmentally friendly vegetable ink

vegetable ink refers to vegetable oil-based ink, which uses vegetable oil as connecting material. At present, the connecting families developed and applied mainly include alkali refined soybean oil, rapeseed oil, cottonseed oil, sunflower seed oil, safflower seed oil and canoia oil, among which the most commonly used is soybean oil-based vegetable ink. Vegetable ink is mainly made of pure natural vegetable color paste, natural vegetable oil water and some additives. The utility model has the advantages that the release amount of volatile organic compounds can be reduced, and the pigment paste does not contain any heavy metals and is harmless to human body. The vegetable ink completely removes the hydrocarbon resin in the common ink and reduces the amount of pigment, which is enough to be used as a substitute for petroleum based ink to change the operation of the experimental machine. There are some points needing attention in the process of use. The thermosetting and quick drying offset printing inks synthesized from rapeseed oil and sunflower oil modified alkyd resin are replaced by mineral oil by fatty acid methyl ester derived from vegetable oil, but the performance of thermosetting offset printing inks needs to be improved; In addition, there are many lithographic intaglio inks with vegetable oil as the main component. In these products, vegetable oil is modified as resin or solvent, which effectively reduces the content of v0c. However, in order to ensure the printing performance, there will still be a certain amount of petroleum resin or solvent. It is believed that with the deepening of research, the amount of these petroleum resins or solvents will gradually decrease

the plant ink has a wide range of applications. It can be applied to the printing of various trademarks, self-adhesive labels of newspapers and magazines, beverages, wine, drugs and various cosmetics in soft packaging boxes and bags, fast food lunch boxes for sanitary products, shopping bags, paper cups and cigarette boxes. In addition, the plant ink will not cause friction and electrification, and can also emit natural flavor. The diversified characteristics of vegetable ink in technology and application make it an environmental friendly ink with a wide application prospect. Taking soybean oil ink as an example, it has better technical characteristics than ordinary petroleum ink, thus forming a more extensive and novel ink application market. To sum up, vegetable ink mainly has the following characteristics

1. Technical features

① excellent environmental protection

ordinary petroleum based inks contain a large number of volatile organic compounds harmful to human body. During ink manufacturing, printing, drying, equipment cleaning and waste ink treatment, a large number of volatile organic compounds not only seriously endanger the health of production operators, but also cause great damage to the environment, For example, the volatile organic compounds contained in v0c series petroleum based inks are one of the strongest carcinogens, seriously endangering human health. However, the content of polycyclic aromatic compounds in plant inks is low, so they basically do not emit VOC when used, and will not pollute the environment, which is conducive to the health of manufacturers and users. In addition, the oil used in ordinary inks is a non renewable resource, and the energy crisis caused by large-scale use has become a serious problem faced by mankind. However, vegetable inks, such as soybean oil, can be regenerated indefinitely and biodegradable. Because D, vegetable inks have incomparable advantages over ordinary inks in terms of resource utilization and environmental protection

② good friction resistance

prints printed with ordinary petroleum based ink (such as newspapers) have poor friction resistance. Usually, when reading, the printing ink on the newspaper is easy to blacken the readers' hands, and often feel the presence of petrochemical odor volatile components in the ink, affecting the readers' health. Newspapers printed with soybean ink As soy ink is more friction resistant, readers will not be troubled by black hands when reading At the same time, there is no bad stimulating odor, so it is generally welcomed by readers. In addition, the boiling point of vegetable ink is much higher than that of petroleum volatile components. When it needs to be heated for printing (such as laser printing, photocopying, etc.), it will not stick to the paper due to volatilization, which is also the feature that vegetable ink is significantly better than ordinary ink. ③ The deinking of waste paper is easy and the damage of paper fiber is less.

according to the research, for the deinking of recycled waste paper, soybean ink is easier to deink than ordinary ink, and the damage of paper fiber is less. At the same time, the waste ink residue after deinking is easier to decompose than the oil-based ink (because the soybean oil system is biodegradable, while the oil system is biodegradable), which is conducive to the drainage treatment operation. This characteristic of soybean ink It is a very favorable factor for waste paper recycling (recycled paper) operation

④ more printing

the moving beam stops automatically; Because soybean oil ink can show a thicker and brighter color effect So that printers can use less ink The cost is reduced and the unit printing volume is increased by about 10% ~ 15%

⑤ the color is deep, rich and bright, which is suitable for a wide range of color printing. ⑥ Non toxic

soybean ink is non-toxic because it does not contain aromatic polycyclic hydrocarbons and other organic volatile harmful components, which is conducive to environmental protection

⑦ good laser resistance

when the printed matter needs laser resistance Soybean ink is the best choice. Its boiling point is much higher than that of petroleum volatile components. When the ink is heated by a laser printer or copier, it will not volatilize and stick to the paper It will not pollute the printing machine parts

2. Application characteristics

unlike petroleum ink, vegetable ink is a non renewable resource For example, soybean oil contained in soybean ink is a rich resource of sustainable regeneration and biodegradable It can continuously provide raw materials for ink production, and has good environmental protection. Use vegetable oil (such as soybean oil) instead of some petroleum mineral oil to make ink It can promote the industrial utilization of vegetable oils in various countries Expand the application scope of vegetable oil At the same time, it can reduce the consumption and import of non renewable oil Save foreign exchange It can be said to be a plan to kill several birds with one stone

3. The main types of soybean inks

due to different printing methods and substrates, different formulations of soybean inks using vision, smell and touch are required Just as gasoline cannot be used in diesel engine vehicles. Therefore Soybean ink also needs to develop a variety of formulas For different printing situations. At present There are mainly the following: ① newspaper ink: newspaper printing with web printing It is a kind of absorption reaction that makes the oil in the ink absorbed by the paper and leaves the printing color on the surface of the paper to complete the printing. This newspaper ink has a high oil content (soybean oil content) Generally, the oil content of black ink is at least 40%, and that of color ink is at least 30%. ② Sheet fed ink: this kind of ink contains more resin, and vegetable oil is at least 20%. ③ Thermosetting ink: low oil content At least 7%. ④ Cold set ink: oil content at least 3o%. ⑤ Commercial form printing ink: containing at least 20% oil. ⑥ Relief ink: this ink is based on water or solvent, and does not contain vegetable oils such as soybean oil But it contains vegetable protein (such as soybean protein) Enables the pigment to adhere to the paper To complete printing. Generally, the protein content is i5% ~ 20%

the rise of vegetable ink originated from the global oil crisis in 1979, when the oil price was soaring The oil supply has brought some problems to the related industries, including the printing industry. In particular, the ink industry is very sensitive to the market supply. In order to mitigate the impact of the oil crisis on the printing industry and avoid the impact of raw material supply on production. The head of the American newspaper Printers Association (now the American Newspaper Association) advocates promoting the development of printing inks that replace petroleum substrates After years of research on the formulation of various vegetable oils, the experimental results show that Soybean ink is non-toxic and pollution-free Moreover, the soybean oil used for cooking is rich in output, cheap, safe and reliable The printing effect is good and conforms to various standard specifications of printing ink, especially the environmental protection performance is superior. The final choice is to make vegetable ink based on soybean oil It was successfully printed in 1987, which enabled the application of soybean ink in the newspaper industry. It can be said that the application of soybean ink is the first in the newspaper industry. There are about 10000 newspapers in the United States, one third of which have used soybean ink, especially more than 90% of the larger 1500 have confirmed its effect and adopted soybean ink. Most newspapers use soybean ink for color printing, and because the price of color soybean ink can compete with petroleum color ink, it has excellent printing effect, bright color and good environmental protection. In the long run Black soybean ink has a strong competitive advantage in newspaper printing because of its good printing effect and high efficiency (if more copies are printed, the cost can be reduced). In addition to newspaper printing, other printing, such as sheet fed ink Thermosetting ink, cold setting ink, commercial form printing ink, relief ink, etc. soybean ink can also be used. In thermosetting printing, vegetable ink can avoid the environmental pollution caused by the volatilization of v0c, and give the printed matter a strong and bright appearance in color printing, so it is recommended by the American Newspaper Association

in recent years, the demand for green printing has been growing, and the advantages of soybean ink have become increasingly prominent. Whether it is to protect the environment, reduce dependence on imported oil, or to ensure sustainable production and renewable use of resources, it is possible to promote the use of soybean oil ink. The United States, Japan, South Korea and other countries have been vigorously promoting the use of soybean ink. At present, 230 ink factories in Japan are engaged in the production of soybean ink and have been used by 75 units. The new environmentally friendly offset printing ink OPI s1o0 for sheet fed paper recently launched by Osaka printing ink company in Japan is a kind of soybean ink recognized by the American Soybean Association. It can be said that the plant ink (big turbulence) will be one of the best choices for environmental protection ink in the future, and its development prospect is very broad.

2005. Canon (China) grandly launched imageprogramw8400/w6400 series two models and four types of new large format inkjet printers for the graphics and imaging industry, leading a new storm in the printing industry

professional strength and excellence

Canon w8400/w6400 series printer not only inherits the dual performance of high speed and high quality that Canon imageprogram I is proud of In addition, Canon's unique large-size, high-density nozzle fine print head technology (1.07 inches) is adopted to create a high-density multi nozzle print head (1280 x 6=7680 nozzles), as well as a new type of print head with built-in 4p1 (microliter) ultra-fine micro ink drops and a new image processing system Greatly improve the printing quality. Adopt PG color ink unique to canon While giving full play to the excellent light resistance, water resistance and color stability, it has achieved the gorgeous and grayscale expressiveness comparable to that of dye ink. Professional color control technology, perfect color matching method and flexible customized ICC curve These two printers have taken the lead in the industry

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