Project Description

plastic spacersPlastic spacers are made of highly crosslinked monodisperse polymer microspheres, which have very narrow particle size distribution. EPRUI supplies plastic spacers for LCD, PDLC display which can precisely control the panel thickness without damage on the base plate and make the liquid screen far greater clarity.

  • Uniform sphere and smooth surface
  • Accurate particle size control
  • Narrow particle size distribution
  • Excellent resistance against heat, cold and chemicals
  • Easy to disperse and no aggregation
  • Excellent mechanical strength and superior crush resistance
  • Free from contaminations


Typical Result

Test Method

Mean Diameter, um


Coulter Counter Multisizer



Coulter Counter Multisizer

Thermal Deposition Temperature



Volatile Components


105℃ 1h



1mm Plate



1mm Plate

Volume Reisistance,1015 ohm cm


JIS K6911

Dielectric Constant at 1kHz


JIS K6911

EPRUI provides three types (H, X and A) of high quality plastic spacers. Among the three series, A type has the highest recovery rate and molulus of elasticity, X type is next and H type is the last.

Type Product CV Diameter(um) Application
H EPRUI-SP-HT <3.5% 2.0-100um TN,HTN
EPRUI-SP-HS <3% 2.0-7.0um HTN,STN,FSTN
X EPRUI-SP-XT <3.5% 2.0-100um TN,HTN
EPRUI-SP-XS <3% 2.0-7.0um HTN,STN,FSTN
A EPRUI-SP-AS <3% 2.0-7.0um HTN,STN,FSTN


Specification H type X type A Type Test Method
Density g/cm3 1.08 1.09 1.09 Multi Volume Density Test
Refractive Index 1.57 1.58 1.58 Na-D-ray
10% Molulus of Elasticity kgf/mm2 300-600 400-650 450-700 Shimadzu MCT210
Chemical Reisistance Weight change after immersion for 10 days at 20 ℃
Water 0.5% 0.4% 0.4%
0.1N NaOH 0.1% 0.1% 0.1%
0.1N HCl 0.2% 0.3% 0.3%
Acetone 0.8% 1.0% 1.0%

Recommended Spraying Methods of EPRUI PLASTIC SPACERs: Dry Spray: For best results, it is recommended to vacuum dry our plastic spacers at 80 °C for 8 hrs (caps off) before dry spraying, which ensures the spacers disperse smoothly and freely. Wet Spray: Disperse our plastic spacer in organic solvent such as isopropanol or ethanol, ultrasonicate for a while before adding proper amount of water, which usually works better than dispersing the beads directly in aqueous solution containing of organic solvent.

Recommended Spraying Density:

Plastic Spacers TN STN
Spraying Density 400-100 particles mm2 80-200 particles mm2


Packing and Storage:

  1. 10g or 20g glass vials with plastic caps and inserts to keep moisture away from the contents. PET vials of 10 g or 20 g are also available upon request.
  2. The label on the vial includes product name, lot number, expiration date, weight, RoHS, inspection passing stamp, etc.
  3. The vials should be stored in dehumidifying cabinets with controlled temperature and humidity. The cabinet should be set at room temperature and kept under25% humidity. It is recommended to use up the entire product in a vial once it is opened.