This article introduces the characteristics and types of UV transmissive black dispersions and their expected applications in the future.
What is UV transmissive black dispersion?
UV (ultraviolet rays) is used industrially for UV-curable resins and photolithography, and is an indispensable element in the chemical industry. Generally, when UV curing is performed by irradiating UV, UV does not penetrate a dark hue, especially a color colored black, which makes curing difficult.The UV transmissive black dispersion introduced here is a dispersion in which pigments are finely dispersed into two features: black and UV transmissive. Therefore, it is possible to sense UV and cure UV while hiding the underlayer and having a light-shielding function.
UV transmissive black dispersions are compatible with various solvents and resins such as urethane resins, acrylic resins, and ester resins.
Characteristics of UV transmissive black dispersion
UV 35%: UV transmissive black dispersions pigment concentration 35% (in coating)
IR 35%：near-infrared transmissive black dispersions pigment concentration 35% (in coating)
CB 35%: Common carbon black dispersion pigment concentration 35% (in coating)
The graph compares three membranes. One is a film coated with a typical carbon black (CB) dispersion, which shows little transmission of light (electromagnetic waves) in the short wavelength region of 360nm or less. The other TOKUSHIKI of near-infrared transmissive black dispersions, which originally transmit long wavelengths (near-infrared rays), also transmits light (electromagnetic waves) near 300nm. However, because it is not intended for the transmission of specialized ultraviolet light, the transmission band is narrow and the level is not high. The last one is the UV transmissive black dispersion introduced in this article. The transmittance has a peak at around 350nm and a broad band.
Because of the UV transmittance characteristic of black dispersions, UV curing is expected to be possible for a variety of applications, such as UV curing of black coatings, which has hitherto been difficult to cure.
Application and lineup of the UV transmissive black dispersion
Utilizing UV transmissive black dispersions is best suited for applications such as black paints or inks for electronic materials, black resists, UV curable inks, and UV sensors.| Lineup | Characteristics |
|---|---|
| UVBK-0001 | Organic solvent based (non-aqueous) UV transmissive black dispersion |
Inquiry on UV transmissive black dispersions
Summary
- TOKUSHIKI's UV transmissive black dispersion liquid has the characteristics of being black and transmitting UV (ultraviolet ray).
- TOKUSHIKI's UV transmissive black dispersions are expected to be used in a variety of applications, including UV curing of black coatings, which has been difficult to cure.
- TOKUSHIKI's UV transmissive black dispersions are compatible with resins such as urethanes, acrylics, and esters, and with various solvents.
