Luminescent material particle size on coating application

Luminescent material particle size on coating application and the luminous intensity has a great influence . If the luminous powder particle size is large, the paint easy precipitation , distributed unevenly affect workability , glow powder suppliers ; if the particle size is too small luminous powder , luminous nature may be destroyed, afterglow time is not long lasting. However, coating processing performance, the luminous powder particle size finer the better , preferably greater than 360 mesh . Luminous powder dosage on the coating properties also have a great impact , luminous powder with less, its total luminous intensity is weak , with the increasing amount of luminous powder , coating significantly increased brightness , but the luminous glowing stone pebbles a certain amount , the then light emission luminance of stable coating . In addition, the luminous powder expensive, its excessive use , will increase the cost of paint . Based on the above considerations, luminous powder dosage of 10% to 20 % is appropriate.

luminous pigment molecules

Rare earth doped alkaline earth aluminates attenuation mechanism exponential decay with temperature , the lower the temperature , the weaker intensity , temperature, light intensity increases rapidly , the decay time is much shorter.
When the coating is lighting conditions , the part of the light is reflected , another portion of the light into the coating interior. Into the glow gravels emitting pigments are partially absorbed by the pigment in the light-emitting molecules are excited , when these molecules will return to the ground state by radiation in the form luminescence . Therefore, the luminous paint luminous paint luminous performance depends . Rare earth doped glow pigment powders aluminate photoluminescent process can be divided into three main stages: light absorption , energy transfer , the emission of light . Absorption and emission of light occurs in the transition between energy levels , have been excited state . Excited state of motion is the energy transfer process .

The rate of excited state level

So long afterglow time depends on the number of electrons in the trap level and the rate of return excited level , afterglow trap level depends on the intensity of the electron in the unit time to return excited level rate.
This luminous paint luminous paint photoluminescent pigment is dominated by the afterglow luminescent properties of the decision. Rare earth doped alkaline earth aluminate luminous emission time is largely determined by the attenuation characteristics and trap effect decisions. Rare earth doped alkaline earth aluminates attenuation photoluminescent films decay with temperature , the lower the temperature , the weaker intensity , temperature, light intensity increases rapidly , the decay time is much shorter.

luminous paint afterglow luminescent properties

The electron trap level quantity, the long afterglow time ; absorb more energy , the electron is excited to overcome the trap level and energy gap between the energy levels (ET), and thus produce sustained luminescence . Photoluminescent pigment energy continues to increase it will make the afterglow time extension , if enough energy to the electron trap level all the time to return excited state level , is not conducive to the extension of time afterglow ; contrary, absorb very little energy , less so that the electron trap levels returned excited state level , but also long-lasting phenomenon was not observed . So long afterglow time depends on Phosphorescent Ceramic electrons in the trap level and the rate of return excited level , afterglow trap level depends on the intensity of the electron in the unit time to return excited level rate.

Fluorescence stick

Fluorescence stick, outer packaged in polyethylene (plastic), built a glass tube sandwich, sandwich liquid inside and outside respectively peroxide and esters, by bending, hitting, kneading, glow in the dark dye and the glass breakage, causing two compounds reaction resulting in luminescence fluorescent dye.
The principle of the luminescence is that the reaction of peroxide and esters is the reaction of the fluorescence, and the energy transmitted to the fluorescent dyes, and then the fluorescence is emitted by the dyes.. The common market of the fluorescence stick usually placed a glass tube sandwich, masterbatch production sandwich and isolated peroxide and esters, after kneading, two compounds reaction makes fluorescent dye luminescence.

photochromic pigments in China's development

At present, the rapid development of the photochromic pigments, Corfu letter Technology Co., Ltd. Tianjin China photochromic sheets leader, now, technology has been widely used, design clothes, nail polish and other areas. Tianjin Fu Technology Co., Ltd. was established in 2010, beginning the main business of organic photoconductive materials and the development, production and marketing of organic photoconductor drum series. Company to meet the different brands, sizes and types of laser printers, laser fax machines, digital copy and multifunction machines with OPC drum series products successfully developed an organic photoconductive material will be the basis in research, development and production. Early company goal is Tianjin Binhai New Area as a production base for Chemical Engineering, Tianjin University research-based, and strive to build the company in five years to become the leading domestic and world advanced level of professional organic photoconductor drum development center and production base.

Typical of luminous pigment application

Typical of luminous pigment application: suitable for display objects at night and the backings
1. The construction and decoration, interior decoration, lighting, painting, wall.
2. Identification of the night marked goods, power switch, tool or toolbox.
3.PUB, KTV, stores, business establishments and other large gatherings landscaping.
4. traffic signs, fire emergency escape systems, military equipment, garden landscaping.
5. watches, buttons, field instrument or indicator, radios, cameras.
6. bicycle, motorcycle, car, body patterns and aluminum ring, steel.
7. Fishing equipment, aquarium equipment, banners, stickers, toys.
8. luminous sheet General jewelry, stunning picture painted, ceilings landscaping ... etc