Development and application of the most popular in

Development and application of inkjet paper

1 preface

Japan's North Vietnam paper company has recently developed inkjet paper with offset printing adaptability. This paper will introduce its longitude and latitude together with the trend of paper

1) trend of printing paper

the highest record of paper production was in 2000. After 2001, affected by the recession, it entered a period of reduction. In the field of printing paper, it reflects the sluggish demand related to it (personal computers, mobile instructions, etc.) and the continuous paper fans in the publishing industry. All paper companies are seeking to develop new products corresponding to market demand to expand market share

generally, printing paper is divided into two categories: books and periodicals paper used to print magazines, literary and art books, books and periodicals paper that filters out some script identifiers and some useless advertising information business books (non coated paper centered on offset paper) and coated paper used to print product samples, manuals, advertising leaflets, etc. the competition in the field of coated paper, which accounts for an absolute share of these printing papers, is very fierce

summarize the current situation in the field of coated paper, such as the following points

① high whiteness and high opacity

the requirement is to rely on whiteness to achieve photographic reproducibility, and not be affected by the negative side when printing thin paper, and pursue high opacity

② high gloss

for gravure inserts, high gloss is required

③ low density (loose density)

requires corresponding light and volume publications

in order to meet the above market demand, North Vietnam company has developed the products shown in Table 1 to be put on the market, so as to actively expand the sales road for users with diversified requirements

2 trend of inkjet paper

in recent years, due to the digitization of offices and the popularity of personal computers and digital cameras in general families, inkjet printers are popular with small and inexpensive output devices. This not only meets the needs of individuals, but also expands the large-scale inkjet printers for full-time personnel in the field of billboards and printing

in terms of inkjet materials, it provides a wide variety of materials, such as matte paper, glossy paper, photographic glossy paper, film (PET, vinyl chloride), synthetic paper, non-woven fabric, etc. Among them, the output of paper-based inkjet paper (matte paper, light here we sincerely thank our customers for their recognition of our company's 1-to-1 Zeze paper) in 2001 reached 2500 tons per month, with an increase of 35%. The growth rate of matte paper type is about 10%, while that of glossy paper type is about 50%

in the future, due to the high performance of inkjet printers, their demand in various fields will increase significantly

2 the difference between printing paper and inkjet paper

the difference between offset paper and inkjet paper is shown in Table 2. In contrast, inkjet paper has a porous structure that absorbs inkjet. The printability of ink-jet printer is completely invisible on offset paper. According to the different inorganic pigments on the surface coating, the absorption of ink-jet is very different. According to the different types of adhesives, the surface strength during offset printing and the printing density of ink-jet are very different, and because of the water resistance of water-soluble ink-jet, the mixing amount of cationic resin is also very different

when inkjet paper coated with silicon as the main body is used for offset printing, due to the differences in ink absorption and surface strength, compared with printing paper, the printing operability and dot reproducibility are greatly reduced, and its commodity value is generally not recognized

according to the above different characteristics, it is very difficult for offset paper and inkjet paper to be universal

3 development of inkjet hybrid special paper

by combining the advantages of offset printing and inkjet printing, the combination of commercial printing and personal printing, and the combination of fixed information using offset printing and variable information using inkjet printing in commercial printing, we are looking forward to expanding new applications

the "inkjet mixed paper" introduced here combines the advantages of inkjet printer printing and offset printing. It is not only an inkjet paper of silicon coated paper type, but also takes into account the inkjet adaptability and offset printing adaptability. Therefore, the advantages of the two printing methods can be combined to produce paper with good printing quality for both fixed information and variable information. 1) Inkjet mixed paper

requires that the characteristics of inkjet paper, such as ink penetration, color, uniformity, ink absorption, water resistance, etc., are made according to the level of special paper, so silicon coating is adopted; Layer. In addition, the composition of paper blank and coating layer is further studied, which is developed as a paper with both inkjet adaptability and offset printing adaptability

just ponder the differences with printing paper and the longitude and latitude of development, and you can see that inkjet mixed paper combines the above two printing adaptability

2) characteristics of inkjet mixed paper

① high matte quality

the paper surface is smooth, and the transfer performance of offset printing ink to paper is good

② natural whiteness

as a paper for printing media, whiteness is required. In addition to giving an impression on the appearance, the whiteness of paper can also get image contrast, which is an indispensable factor to create high-quality images. The relative humidity is not greater than 80%

③ ink jet printing can be used on offset prints. Ink jet printers can be used on offset prints (less than 60%) to overlap printing, and its chromaticity and penetration remain unchanged

④ the pen is suitable for writing, and there is no ink leakage when writing with a water-based pen or an oil-based pen

3) use of inkjet mixed paper

inkjet mixed paper is a kind of printing paper that can give consideration to the fixed information of offset printing and the variable information of inkjet printing on one paper

therefore, as a hybrid paper that can reproduce high-quality images with the help of offset printing and inkjet digital images at the same time, it is expected to be applied in many fields

for example, for offset printing, personal favorite patterns, photos, and words are printed in color, and enterprises then overprint variable information in color, such as postcards, business cards, cards, calendars, etc., which are suitable for various purposes

in addition, the following points should be paid attention to when using inkjet mixed paper for offset printing

① the printing can be completed with general printing ink, but the viscosity can be reduced with ink blending oil, so the printing can be carried out without problem, and stable and good prints can be obtained

② the printing speed should be 8000 sheets per hour

③ the stamping setting should be slightly higher to improve the density of the field

product specification of inkjet mixed paper

inkjet mixed paper can be divided into double-sided coating (W) and single-sided coating (V). The physical property values of its products are shown in Table 3 (reference values)

because it is a product developed with new concepts, it does not need to be bound by fixed concepts. In the future, I want to gradually develop new uses in the process of exchanging views with users from all walks of life. (Wen Dingyi)