Sekisui Plastics Develops New Techpolymer Particles (Blue Light-Cutting Particles)

   Sekisui Plastics Develops New Techpolymer Particles (Blue Light-Cutting

PR Newswire

TOKYO, May 7, 2013

TOKYO, May 7, 2013 /PRNewswire/ -- Sekisui Plastics Co., Ltd. has announced
the development of new polymer particles that control a potentially
health-damaging range of blue lightemitted by LEDs. The company expects to
add the particles to its Techpolymerproduct lineup, use them for conventional
applications such as liquid crystal displays and luminous sources, and develop
new markets.


1. 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 of 380-500 nm.
Light in this range is blue, visible light, and as its wavelength is short, it
has a high energy level. There are concerns that looking at blue light for an
extended period of time may cause retina damage, eyestrain, deterioration of
eyesight, age-related macular degeneration, sleeping disorder, and various
other adverse effects.

To deal with these issues, we have developed new particles that filter out the
blue light emitted by LEDs.

2. Features
Conventional applications 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 the
light diffusion properties of Techpolymer.
(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.

Compared to the conventional acrylic particles, Blue Light Cut Particles
filter out blue light.

Examples of fields of application
Blue Light Cut Particles can be coated onto films to arbitrarily control the
percentage of blue light altered out.

Lineup of particles
These particles can be adjusted to constant particle size distribution, and
thus can be used in a variety of optical applications.

3. Future development
In the future, we will develop applications such as surface protection films
for smartphones, tablet PCs, and other products in the field of LED liquid
crystal displays, and lighting covers and liquid crystal panel materials in
the field of LED lighting.

Kiyonobu Madenokouji
Fine Polymers Sales Group
Fine Polymers Business Division
3rd Business Headquarters
Sekisui Plastics Co., Ltd.
Tel: +81-3-3347-9613

SOURCE Sekisui Plastics Co., Ltd.

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