Large tracts of land frosted and specular light become the technology of antifalse effect pattern
Technical field
The present invention relates to the ornamental print process of a kind of imitative metal etch etc., relate in particular to the technology that a kind of large tracts of land frosted and specular light become the antifalse effect pattern.
Background technology
The aluminizer gold card paper is the packaging material paper of the about 12 microns aluminizer of a compound bed thickness on all kinds of paperboards, and it is golden that the aluminizer surface is, and it is used for the packaging of high-grade goods more, for example is used for cigarette case, wine box, tea caddy, Medicine box and cosmetic container etc.On this class aluminizer gold and silver paperboard, further form the promptly imitative metal etch of frosted finish effect pattern, can make this paperboard packing have more high-grade sensation.The method of common formation frosted pattern is to adopt the imitative metal etch ink screen print process of UV, but chromatography frosted simultaneously of large tracts of land high accuracy and minute surface frosted are very difficult, and print speed printing speed is also slow, and production capacity is low, does not satisfy the needs of silk screen seal commercial technology.
In addition, also have following point also to reflect the difficulty that the imitative metal etch printing ink of UV uses in serigraphy: 1, the frosted of described frosted pattern is to produce by the particle in the imitative metal etch printing ink of UV, it is responsive especially to the variation of environment temperature, the temperature height, the sand oil viscosity that becomes is low, and the sand sense becomes thin and slides; When temperature was hanged down, ink flow was poor, and the sand sense becomes coarse.Particle in the printing ink also can block up version, and the silk screen seal can't be continued: 2, in the imitative metal etch printing ink of UV a lot of kinds such as carse, medium and small are arranged, the particle in the printing ink is difficult to be evenly distributed, poor repeatability, and the frosted finish effect that each kind is printed off is all inequality.3, the imitative metal etch printing ink of UV needs to carry out photocuring with high-power ultraviolet lamp earlier and could produce frosted finish effect, and its radiation parameter slightly changes, and the pattern of the frosted finish effect that produces has significant difference, and for this reason, the homogeneity of printing is very poor.
Summary of the invention
The objective of the invention is to overcome the defective that the imitative metal etch printing ink of UV exists in the prior art in serigraphy, provide a kind of large tracts of land frosted and specular light to become the technology of antifalse effect pattern, produce frosted and two kinds of patterns of minute surface frosted finish effect simultaneously to reach, the homogeneity of its printing is good, be difficult for stifled version, print speed printing speed is fast, and output is big, forms frosted and the requirement of good quality of minute surface frosted finish effect pattern.
For achieving the above object, the invention provides the technology that a kind of large tracts of land frosted and specular light become the antifalse effect pattern, may further comprise the steps:
1. the frosted finish effect pattern is carried out silk screen latex sensitization phototypesetting plate-making, adopt the oblique wire drawing reticulated printing of silk screen version;
2. prepare the imitative metal etch printing ink of UV, the filler in the prescription will use the spherical nano powder of silica:
3. the food blending machine with the transformation of the way stirs the imitative metal etch printing ink of UV; The selection of mixing speed and time: summer and autumn with 4800 change/hour speed stirred 40 minutes, save 7200 commentaries on classics/speed at one hour rating winter in spring and stirred 1 hour; Through the agitating friction heating of mixer, the temperature of the imitative metal etch printing ink of last UV is increased to 48-50 ℃.
4. with the electrical heat tracing bucket the imitative metal etch printing ink of UV is carried out heat tracing and handle, make the temperature of the imitative metal etch printing ink of UV keep 60 ℃ of constant temperature constant.
5. the screen printing plate that makes is installed on the screen process press, in ink feed slot, adds the imitative metal etch printing ink of UV.
6. the pressure by scraping blade for printing machine is transferred to printing ink on the silk screen version on the aluminizer gold card paper, will carry out the control heating while printing to the imitative metal etch printing ink of the UV between doctor and the returning blade simultaneously in printing process;
The imitative metal etch printing ink of UV that 7. will be transferred on the aluminizer gold card paper carries out the ultraviolet light oven dry and makes it the dusting typing by the uv cure machine below the 470nm, and the baking and curing time is about 3-6 second, and the baking and curing temperature is about 165 ℃-200 ℃;
8. the oven dry after the aluminizer gold card paper through fan group wind-cooling heat dissipating, go the diluent smell to finish the printing of frosted finish effect pattern.
The principle of ultraviolet light polymerization of the present invention is to activate free radical by the ultraviolet light below the 470nm, and the molecule of free radical is cross-linked with each other, and is become the process of solid by liquid.
The used filler sand powder of the present invention is selected the spherical nano powder of silica for use, because the specific surface of nano powder is big especially, some performances different have been produced thus with conventional pulvis, after adding in the silk screen printing ink, not only in time, produce decorative pattern good moulding effect arranged, and can improve curing rate significantly.
Advantage of the present invention is that large tracts of land frosted and specular light become that the antifalse effect pattern changes into the site by the silk screen emulsion or lines are made a plate, transfer to the imitative metal etch printing ink of UV on the stock on demand during printing, directly obtain pattern, it is very easy to control, and the homogeneity of pattern printing is fine.So long as a forme, with the imitative metal etch printing ink of a kind of UV, same seal machine with a kind of paper, even print up to a million, also is difficult to mutual difference.It has made full use of the high scattering of the imitative metal etch printing ink of UV, high refractivity, the high reflective that cooperates oblique wire drawing network technology, aluminizer gold card paper, print out pattern with frosted sense and optically variable anti-counterfeiting, owing to adopted the thermostatic control technology, overcome the contradiction that produces between frosted finish effect and the stifled version, the homogeneity of pattern more is protected.In addition, the diluent of reactive diluent in the imitative metal etch printing ink of the UV that the present invention disposed for participating in reacting.To the innocuousness of human body, light trigger non-carcinogenesis material belongs to environment-friendly ink; Be particularly suitable for top grades such as cigarette, wine, cosmetics, health products packing is printed.The speed of a motor vehicle of screen printing reaches as high as 450 meters/minute more than 80 meters/minute, and it is fast to have print speed printing speed, the advantage that pattern is of good quality.
The specific embodiment
Below product-elaboration " red rose " frosted operation of being printed of preferred our company be that example describes the present invention in detail.
The elaboration that company printed " red rose " frosted operation is:
1. print preparation, the frosted finish effect pattern carried out silk screen latex sensitization phototypesetting plate-making, adopt silk screen tiltedly to draw, the screen printing plate tension stability 31-33 newton/centimetre in, make screen printing plate indeformable;
2. be equipped with the imitative metal etch printing ink of UV by following constituent and percentage by weight:
Epoxy acrylic resin 20-50%, reactive diluent 20-40%, sensitising agent 3-8%, defoamer 1-5%, filler 20-40%, colorant 1-20%;
In the said ratio, active reactive diluent is tripropylene glycol diacrylate or ethoxylated trimethylolpropane triacrylate or the composition of the two; Sensitising agent is 1-hydroxyl-cyclohexyl-phenyl ketone, methyl o-benzoylbenzoate, or 4-chlorobenzophenone, or its composition; Filler is the spherical nano powder of silica;
3. stir the imitative metal etch printing ink of UV: stir the imitative metal etch printing ink of UV and change a social system the selection of mixing speed and time with food blending machine: summer and autumn with 4800 commentaries on classics/hour speed stirred 40 minutes, save 7200 commentaries on classics/speed at one hour rating winter in spring and stirred 1 hour; Through the agitating friction heating of mixer, the temperature of the imitative metal etch printing ink of last UV is increased to 48-50 ℃.So that the molecule of the imitative metal etch printing ink of UV is active, improve printability.
4. the imitative metal etch printing ink of UV being carried out heat tracing handles: with the electrical heat tracing bucket the imitative metal etch printing ink of UV is incubated processing, makes the temperature of the imitative metal etch printing ink of UV keep 60 ℃ of constant temperature constant.
5. the screen printing plate that makes is installed on the screen process press, in ink feed slot, adds the imitative metal etch printing ink of UV.
6. the pressure by scraping blade for printing machine is transferred to printing ink on the silk screen version on the aluminizer gold card paper, will carry out the control heating while printing to the imitative metal etch printing ink of the UV between doctor and the returning blade simultaneously in printing process; The temperature constant that guarantees this place is at 60 ℃, so that keep consistency before and after the sand sense.
The imitative metal etch printing ink of UV that 7. will be transferred on the aluminizer gold card paper carries out the ultraviolet light oven dry and makes it the dusting typing by the uv cure machine below the 470nm, and the baking and curing time is about 3-6 second, and the baking and curing temperature is about 165 ℃-200 ℃.
8. the oven dry after the aluminizer gold card paper through fan group wind-cooling heat dissipating, go the diluent smell to finish the printing of frosted finish effect pattern.