Printing two (non-contact printing)

Non-contact printing is printing, any part of the printer is not contact surface are printed. The main method has the ink jet and laser printing type two kinds. Contact print compared with non-contact printing, people attach more importance to the latter. This is because the non-contact epson printer ribbon printing, can be in operating condition changes under the condition of wide application; And on a variety of different materials, can print out the clear writing and design in a reliable way.
1. The ink jet printing method
This method is to put the tiny point from one or more ink spray printing head through the slot injection into a production line of each package, the form of lattice's handwriting. The handwriting height is from a few millimeters to more than 50 mm.
Use a microprocessor control program of the letters and Numbers, number equals the number of spray printing head. At the same time, through the role of the sensor and the speed of production line, to ensure that each package can correctly printed on code (with words and Numbers compatible olivetti printer ribbon represent data).
Ink jet is accomplished by pressure or electrostatic. This method USES the printer there are many kinds of models. Can along the horizontal direction from bottom to top, from top to bottom; Print or from any Angle. In the two kinds of non-contact printers, ink jet printer used more widely.
2. Laser printing method
By the laser beam transmission system, optical imaging system and sensor of synchronous positioning system. In optical imaging system, in addition to the reflector and transmitting mirror, there is an engraved with the printout template. The laser beam through the gap on the template and the image on the surface of the focusing lens in the packaging. Instantaneous high-energy from laser beam, in the microscopic thin layer on the surface of the packaging printing work according to the shape of the image.
The role of laser energy produced in the package, depends on the composition of surface; On the coated metal and paper, is the coating material (such as ink, paint and spray paint, etc) to burn to a layer to form the handwriting; In some plastic or ceramic surface, the result of shows like heating effect of color pigment handwriting; On the glass, and some other plastic function, the result like frost or etching effect of handwriting.
Different plastics have different reactions to the laser energy. Some plastic only absorb all or part of the wavelengths of light in the laser does not absorb.
In acetate, cellophane, polyester, vinyl resin, polycarbonate, polystyrene, polyvinyl chloride, such as material, use laser printing can get very good effect.
Laser for polypropylene and polyethylene film doesn't work. This feature is also useful. Can be used in the film wrapped package paper to print. This is to use other printing methods do. Aseptic packaging of fruit juice and other drinks, for example, after filling outside with plastic film wrapping package for laser doesn't work, preserved in cold storage or wholesale stores in the freezer. When sold to retail stores to sell date print. It can not print during production, and with a laser at the beginning of the sales through the plastic film on the aluminum foil or paper to print the date code.
The main advantage of the laser printing is printing the handwriting will not be dirty, alter or wipe away. Defect is the printer price is expensive, so that its application is restricted. Only commonly used for mass production, or use other printing methods can't print.
About the standard of trademark, packing marks and codes, regulations, rules, some have been issued and implemented, some is in the formulation, will be published and constantly improve, this part name as follows:
Dangerous goods packaging symbol GB190-85.
GB191-85 packaging graphic symbol.
GB388-86 transport packing shipping marks.