Electron beam curing varnish (EB varnish)
EB varnish is different from UV varnish, it does not require a photoinitiator to trigger the initial reaction. This is because electron beams are like “hard†beams like X-rays and nuclear radiation beams in the spectrum, or more correctly, ion beams, which means they can be provided without photoinitiators. In the case of a stimulus, it splits and releases reacting free radicals in the varnish. An electron beam that also has a destructive effect on human cells and microorganisms is generated by a tungsten wire cathode in a high vacuum, accelerated by a high voltage through a ring anode, and applied through a titanium foil beam hole in an inert gas environment On the substrate.
Because electron beams cause damage to health, and the X-rays generated when the electron beams are decelerated in varnish are equally dangerous, the system must be safely encapsulated and personnel must be regularly checked with a radioactive dosimeter. The investment in technology is also considerable, although not excessive for packaging printers. The most expensive EB system can be found in the furniture industry. Although the systems available for printing presses are only slightly more expensive than a full set of UV equipment, operating costs should not be underestimated. The biggest project is the nitrogen needed by the inert gas chamber to prevent the ionization of atmospheric oxygen. In comparison, its energy consumption is almost negligible.
Personalized invitations printed on the NexPress digital printer of Kodak with the NexGlosser glazing device. The gloss of the powder coating fixed by heating is close to the quality of UV varnish
In fact, electron beam curing does provide many beneficial properties:
* It is bactericidal and produces neither odor nor migration substances, so EB-cured inks and varnishes are particularly suitable for sterile folding cartons made of cardboard or compounds (such as TetraPak beverage cartons) or Metal foil packaging for the pharmaceutical and food industries.
* Especially for flexographic printers, EB glazing is an economical and practical solution to replace the coating with oriented polypropylene (OPP) film. Cost savings exceed 10%.
* The deep influence of EB radiation and its ionization ability (up to 50% of solid matter) can be set by voltage (150-250KV), so curing is always fast and complete. EB radiation is more effective for a particularly thick glazing oil layer (a benefit not only favored by furniture manufacturers), and can penetrate substrates, so double-sided glazed paper, cardboard and synthetic membranes need only be irradiated on one side It will be able to cure the varnish on both sides in a few microseconds.
* The energy input required is only about one third of UV curing, and only one sixth of IR drying. However, the efficiency level is very high: 90-95% of this energy is used, while the utilization rate of UV curing is only 50%.
* EB radiation is "cold"-the electron beam curtain does not generate heat, so even heat-sensitive substrates can be easily coated, as long as the radiation has no direct harmful effects on the molecular level.
* Uses the same acrylate binder as the free radical curing UV varnish, but no expensive photoinitiator, so EB varnish is cheaper for manufacturers than UV varnish (limited demand for this The impact of price is greater). And because they do not contain photoinitiators that are prone to decay, the shelf life of EB varnishes is longer than that of UV varnishes.
Aluminum Mirror is also called aluminized glass mirror, glass mirror, mirror glass, mirror plate glass. Based on the different reflective layers on the back, civilian mirrors are generally divided into aluminized glass mirrors and silver-coated glass mirrors. The aluminum mirror is the aluminum coated with the reflective layer, and its reflectivity is lower than that of the silver-coated glass mirror.
In addition, we also sell Silver Mirror glass, silver mirror commonly known as waterproof mirror, mercury mirror, silver-plated mirror on glass surface, glass mirror, mirror glass, etc. Silver mirrors are widely used in furniture, handicrafts, decoration, bathroom mirrors, cosmetic mirrors, optical mirrors, and car rearview mirrors.
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