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What is the UV?

时间:2016-04-18 16:49来源:sankun点击:

What is the UV?

UV is English Ultraviolet Rays, the Ultraviolet light. Ultraviolet (UV) is invisible to the naked eye, is beyond the visible light purple section of electromagnetic radiation, the wavelength in the range of 10 to 400 nm. Usually according to the properties of the thin for multiple band:
A Vacuum ultraviolet (Vacuum UV), wavelength for 10-200 nm
Shortwave ultraviolet b (UV -c), wavelength is 200-290 nm
C uvb rays (UV - B), wavelength is 290-320 nm
D long wave ultraviolet light (UV - A), wavelength is 320-400 nm
E Visible (Visible light), wavelength for 400-760 nm
UV (ultraviolet) industrial applications generally use is long wave UV UVA wavelengths of UV light source adopts: mercury lamp, electrodeless lamp and xenon lamp. (see the introduction)


The UV wavelength measurement unit: nano
"Nano" is an English namometer (abbreviation: nm) translation, is a unit of measure, one nanometer is one hundred millionth of a millimeter, is also the billionths of a metre, or the equivalent of about 45 atomic length of the string together。

The UV light measure
Power density: w/cm
The UV energy: mj/cm2
The UV light intensity: mw/cm2


The UV curing principle
Add light initiator in a specially formulated resin (or photosensitizer), after absorption in the ultraviolet (UV) light curing equipment after high intensity of ultraviolet light, active free radicals or ion, causing polymerization, crosslinking and grafting reaction, the resin (UV coating, printing ink, adhesive, etc。) in seconds (range) from liquid into solid。 (this process is called "UV curing")。

The UV curing technology
UV curing technology is a new Energy saving and environmental protection technology, which is also called "4 e" technology (4 e: Energy - saving Energy; Ecology - environmental protection, pa. - Economy; Excellent - high quality). Compared with the conventional thermal curing technology, UV curing technology of low energy consumption, fast curing speed, higher efficiency, no after thermal effect, and the product can be used after curing, the space is small, easy to operate, UV curing product physical properties, corrosion resistance, solvent resistance performance is improved.

UV cure coatings
  UV curing process can be used in coatings, inks, adhesives and other specific areas。 The most widely used in coatings and printing inks, especially in the coating production of most。 , depending on the use of the application field of UV curing coatings can be summarized as the following aspects:
(1) - filling putty, wood processing, surface coating; Decorative paper coating.
(2) paper, print processing - paper waterproof coating; Print gloss coating; Senior paper manufacturing;
(3) plastic processing, PVC floor surface wear-resisting coating; Organic glass, polycarbonate sheet surface increase hard coating; Steaming aluminum plastic surface pretreatment layer. Plastic parts surface decorative coating; Reinforced plastic surface decorative coating.
(4) metal processing, anti-rust coating; The dry plating low-level; Decorative coating of metal products.
(5) enhanced optical fiber coating
In addition, UV curing coatings is widely used in the electronics industry (semiconductor chip, integrated circuit chips, the manufacture of electronic components, etc), medical and other fields.


The UV curing technology applications
Coating: wood, metal, plastic, paper, coating and inorganic materials.
Ink, screen printing, offset printing, gravure, embossed.
Pressure, pressure sensitive adhesive: layer, encapsulation, strip coating.
Electronic industry: corrosion, printed circuit board, and other.
Information technology: fiber coating, fiber coloring, magnetic medium, the optical medium.
Rapid prototyping: model making.


TAG:uv(18)
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