Sekisui Plastics Europe B.V.

New Techpolymer Particles (Blue Light Cut Particles)

Figure 1. Comparison of wavelengths with different light sources
Development Background
Fluorescent lamps were used as conventional light sources, but they have been increasingly replaced by LEDs in recent years. As a result, our living environment now contains strong light in the wavelength range 380–500 nm [Figure 1]. Light in this range is blue, visible light, and as its wavelengths are short, it has a high energy level. There
are concerns that looking at blue light for extended times may cause retina
damage, eyestrain, deterioration of eyesight, age-related macular degeneration, sleeping disorders, and various other adverse effects.

To deal with these issues, Sekisui developed new particles which filter out the blue light emitted by LEDs.

Conventional products were mainly films that used simple pigments. Sekisui Plastics has now successfully
developed pigment-containing particles. These particles have the following features:
1. This new type of particle can filter out blue light, while maintaining Techpolymer's light diffusion properties.
2. By using these particles, the percentage of blue light filtered out can be arbitrarily controlled, up to a
maximum of 60%.
3. This technology can be applied to the manufacturing of particles containing additives other than pigments.

Blue Light Cut Particles can be coated onto films to arbitrarily control the percentage of blue light filtered out.

Particle size distribution can be adjusted depending on your application.

Future Development
In the future, Sekisui Plastics will develop applications such as surface protection films for smartphones, tablets, laptops and other products with LED displays and lighting.

for more information visit us at http://www.tech-p.com/en/products/customize.html