Functional fine particles
Hayabeads
“Hayabeads” functional particles are used as cell gap spacers for LCD panels by a number of LCD manufacturers within Japan and overseas. Their use however is not limited to only LCD panels, they are being deployed in an ever-growing range of applications including various sensors which require detailed thickness control, touch panels, conductive spacer base materials, and more.
■ Suspension polymerization high precision classification products Monodispersed particles which are given a sharp particle size distribution through wet-classification of particles produced through suspension polymerization. Classification nearly completely removes large and fine particles which greatly differ from the average particle size.- Can be produced as uniform particles with an extremely sharp particle size distribution of Cv. value*2% to 5% at a range of 4 μm to 15 μm.
- Because they are crosslinked acrylic particles, they possess extremely good heat resistance and almost no change in physical properties due to heat.
- They also have excellent chemical resistance, making them insoluble in most solvents.
- Extremely low impurity concentration of 1 ppm or less provides outstanding reliability.
- Excellent dispersion in water and alcohol resulting in no secondary or tertiary clusters.
- Extremely high crosslinked density provides the hardest as resin particles, which in turn gives the particles outstanding recovery properties. (L-11)
- Average particle size can be adjusted in 0.05 μm increments.
- Has no melting point, and carbonizes at temperatures of 400°C and over.
Material
Acrylic resin
Product name
LCD cell spacers: Hayabeads L-11
Coloring/surface treatment spacers: Hayabeads L-34
Applications
LCD cell spacers
Touch panel seal spacers
Gap material for various precision applications, etc.
- Can be produced as uniform particles with an extremely sharp particle size distribution of Cv. value 4% or lower at a range of 2 μm to 50 μm.
- Particles with a variety of strengths, hardnesses, recovery properties, and other physical properties can be design through different combinations of monomers and production methods.
- Combining with wet classification nearly completely removes large and fine particles.
- Surface treatments can also be carried out to add color, adhesives, functional groups, and more.
Material
Acrylic resin, styrene resin, other
Product name
LCD cell spacers: Hayabeads 3DS
Acrylic/styrene crosslinked particles: Hayabeads SD Series
Applications
LCD cell spacers
Conductive particle base materials
Gap material for various precision applications, etc.
Properties
Unit
Measurement value
Measurement method
Notes
Specific gravity
-
1.33
JIS K7112C
Actual measurement value
Compression strength (6.0 μm)
kgf/mm2
106
Shimadzu Corporation microcompression testing machine
Actual measurement value
10% modulus of elasticity (6.0 μm)
gf/mm2
66
Shimadzu Corporation microcompression testing machine
Actual measurement value
Recoverability (6.0 μm 1 g load)
%
92
Shimadzu Corporation microcompression testing machine
Actual measurement value
Refraction index
-
1.5
Na-D-ray
Reference value
Transparency
%
90
1mm plate
Reference value
Critical surface tension
dyn/cm2
40
Plate contact angle measurement 1 mm plate
Reference value
Coefficient of linear expansion
/℃
5×10-5
15-55℃ 1mm plate
Reference value
Specific resistance
Ωcm
3×1015
JIS K6911 1mm plate
Reference value
Surface resistance
Ω
1×1015
JIS K6911 1mm plate
Reference value
Permittivity
4
JIS K6911(1000Hz) 1mm plate
Reference value
Dielectric tangent
0.02
JIS K6911(1000Hz) 1mm plate
Reference value
Water content
%
1
110℃×1hr
Actual measurement value
■ Document
DUS(pdf)