UV printing plastic film surface, common sense - plastic film, UV printing - silk screen printing industry, especially web

Plastic printing material used in the printing industry are decades old

, with uv ink varnish of the popular plastic substrates in uv ink printing to the printer and ink factory new issues raised, the maximum The question is how to uv ink varnish firmly adhered to the plastic substrate surface, that is, adhesion problems. HC screen Special Indian network Plastic UV films Print Of common sense in the plastic substrate surface coating uv uv ink print or increasingly popular, and this is a challenging task. Plastic printing material used in the printing industry are decades old, the prevalence of varnish with uv ink, plastic substrates in uv ink printing to the printer and ink factory raised new issues, the biggest problem is how to uv ink varnish so firmly adhered to the plastic substrate surface, that is, adhesion problems. 1. Plastic substrate surface tension Plastic printing, plastic substrates of the surface tension is the primary factor to consider first. Many plastic films have not been before, the surface tension is very low, generally need to be Surface Treatment To increase the surface tension of plastic substrates, usually treated to achieve 40dyncm2 even higher. Typically, the supply of plastic manufacturers for plastic substrates were surface treatment, but treatment effect will soon be lost. On the printer, the connection handle is the best solution to ensure the printing plastic printing surface tension is maintained in the acceptable range. Corona discharge (oxidation) is the most common treatment approach, it is used in a variety of surface treatment of plastic film, and will not damage those of temperature-sensitive plastic substrates. High frequency high voltage corona discharge or the frequency high-voltage discharge, on the plastic surface treatment, to surface activation, was porous, plastic film surface to enhance adhesion of the ink to improve the film's printability. For example: common pe (PE) film through corona discharge treatment, in the pe generated molecular chain carboxyl, carbonyl and other unsaturated bonds. Surface after oxidation, so that pe molecules into polar molecules, an increase of surface energy. Usually, pe of the surface tension increased after treatment from 31dyncm2 to 39-40dyncm2, this increased pe uv ink varnish film on the wettability and adhesion, thus enhancing the degree of imprinting of the firm. More Flame temperature of the plastic products used for surface treatment, so that plastic under high temperature in an instant to remove surface oil and melt the surface layer to enhance the ability to dwell; also use chemical treatment, but that This method usually used in conjunction with corona discharge treatment method, chemical treatment methods using oxidants on the surface of polyolefin plastics processing, so that on the surface of polar groups, so that the surface of the plastic substrates can be good profit uv printing ink varnish wet adherent. To test the plastic substrate surface treatment effect, the best manufacturers of plastic film printed with dyne test pen. Treated plastic film, the surface tension of ink is lower than the surface tension of plastic films. Similarly, in order to make the surface wet varnish in the ink well and firmly adhered to the surface of ink and varnish to the surface tension is lower than the ink surface tension. Therefore, uv ink formulations on the selection of raw materials, very sophisticated, it is acceptable to have access to surface tension. Study a wide range of ink formulations found Solvent Surface tension of inks generally low compared with other types of ink, it can shop a variety of plastic film to start wetting the surface. Therefore, the surface treatment of plastic substrates, particularly when the special key uv ink printing. 2. Plastic substrate expansion and penetration performance And used many different printing paper and cardboard, plastic substrates for ink varnish does not penetrate the surface to its internal pore. However, some plastic substrates in contact with the raw materials of some uv ink varnish, it will produce expansion. Therefore, the use of this feature to make plastic substrates with the use of some uv ink, the ink varnish can penetrate into the internal plastic substrates. In curing, the ink varnish because of the internal penetration, the ink varnish and plastic substrates can be formed between the surface of strong adhesion. In addition, you can raise the room temperature to enhance the plastic substrate and ink penetration effects between varnish, which is uv ink varnish and plastics to improve adhesion between film one way. Highlights the essence of all in 2009, "China Industry News Daquan? Silk screen printing industry, particularly paper," On-line free of charge from More exciting, please see>>

UV printing plastic film surface, common sense - plastic film, UV printing - silk screen printing industry, especially web

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