Views: 97 Author: Site Editor Publish Time: 2021-09-07 Origin: Site
Glow pigments are divided into organic fluorescent pigments and inorganic fluorescent pigments.
Organic fluorescent pigments are commonly known as daylight fluorescent pigments, which can be processed into fluorescent dyes and constitute those brilliant and eye-catching colors on clothing and shoes; inorganic fluorescent pigments are commonly known as fluorescent powder, such as fluorescent pigments used on fluorescent lamps and fluorescent inks used for anti-counterfeiting).
Fluorescent pigments are colored substances with fluorescence that are insoluble in media. After absorbing the visible light and ultraviolet light, the fluorescent substances can change the ultraviolet fluorescence, which cannot be felt by human eyes, into visible light of certain color, and their total intensity of reflected light is higher than the general colored substances.
However, these fluorescent substances themselves often have inherent deficiencies in light resistance and solvent resistance. One way to overcome these inherent deficiencies is to chemically or physically fuse them into the structure of a polymer material, which is then further processed into a dye. The polymer material used for this purpose acts as a solvent for the fluorescent colorant and also provides protection for the fluorescent colorant, thus giving the fluorescent colorant better light and solvent resistance and other properties.
There are very many categories of daylight fluorescent pigments, depending on the nature of the polymer to be used.
According to the nature of the carrier resin, they can be classified into: a thermoplastic fluorescent pigments: linear; b thermosetting fluorescent pigments: bulk; c soluble color essence fluorescent pigments; d aqueous emulsion fluorescent pigments.
According to the classification of carrier resin category, it can be divided into: a amine resin; b polyamide resin; c polyester resin; d acrylic emulsion.
According to the classification of application, it can be divided into plastic and coating. Subdivided into: a plastic: low temperature type; medium temperature type; high temperature type; b coatings: water-based coatings; oil-based coatings; powder coatings.
According to the classification of environmental indicators, there are: a formaldehyde; b formaldehyde free.
Under natural light conditions, whether it is dawn, dusk, gray fog climate or projection, etc., fluorescent luster has far better visibility than traditional luster, which can attract people's attention earlier and faster. These characteristics of fluorescent pigments make them have excellent performance in coloring plastic, sol, paper, color paste, ink, paint, coating, masterbatch, chemical fiber, textile, etc.
The earliest and most widespread commercial application of fluorescent pigments is advertising of all kinds: from advertising signs inside and outside stores to huge advertisements along the highway; from all kinds of commodity packaging to all kinds of magazine covers and advertising inserts, etc. With the development of commodity economy and science and technology, fluorescent pigments and their properties have been widely used in more and more fields.
For example, in the field of safety marking: fire fighting and rescue vehicles, rescue facilities and equipment, construction sites, dangerous equipment, other industrial equipment and places, traffic marking, traffic workers' clothing, forestry workers' and hunters' clothing, etc.
In the field of automation and high technology, fluorescent pigments are also used for optical identification. For example: marking, tracking and sorting documents, mail salvage, etc. The dazzling fluorescent colors are increasingly used in almost all other areas where color is used. Examples include various children's appliances and toys, modern art, arts and crafts, fashion, etc.
Fluorescent powder (also called glow powder), usually divided into photoluminescent storage glow powder and glow powder with radioactive two categories.
Photoluminescent storage glow powder is phosphor in the natural light, daylight, ultraviolet light and other irradiation, the light energy stored, after the cessation of light irradiation, and then slowly released in the form of fluorescence, that is, in the daytime environment to absorb light, in the darker places at night to glow.
With radioactive glow powder, is mixed with radioactive substances in the phosphor, the use of radioactive substances constantly emitting rays to excite the phosphor glow, this type of glow powder glow time is very long, but because of toxic and harmful and environmental pollution, etc., so the application range is small.
Finally, it should be noted that the radioactive fluorescent materials are generally more expensive, the state also has the corresponding regulations to control the market, so the common glow stick on the market is generally not radioactive. Glow stick sellers say that the glow stick liquid is not toxic, but according to the relevant departments in the market sample testing, almost all commercially available glow sticks contain dimethyl phthalate, dibutyl phthalate two toxic ingredients, and the content is between 20%-50%.