"Large Particle Spacer" is made of a cross-linked co-polymer resin of divintylbenzene, which is transparent and rigid, and has true sphere shape.
The product has the same high quality as a the spacer for LCD, i.e.:
?* Very sharp particle diameter distribution,
?* Excellent thermal stability and
?* Excellent chemical resistance,
The above qualities are due to our unique technology of the LCD spacer,"Micro-pearl SP".
The Large Particle Spcer is favorably accepted as the spacer for automotive and optical instruments.

Variety Range Available diamerters 10 to 100?m in 10?m increments Above 100?m 150?200?250?300 & 350?m

Applications 1)Spacer to control gaps for adhesive 2)Gap control of automotive instruments 3)Gap control of optical instruments 4)Gap control of electronic parts

Various precision, color and surface treatment is available on clients' requirements.

Characteristics

1) The spacer keeps the gap constant and even.
2) With its excelent high and low temperature resistance, it functions perfectly between -40 and 200'C to hold the designed gap.
3) Particles are in true sphere shape.
4) They are transparent.

Conductive layer opver the Particles

We will supply, on request, conductive particles made by depositing conductive layer opver the Large Particles Spacer.

Property

Property Measured value Form of test piece Test method Compressive strength 11 Block JIS K 7208, Cylinder Compressive modulus 480 Block JIS K 7208, Cylinder Specific gravity 1.19 Plate JIS K 7122 Coefficient of thermal expansion 9.8×10 Plate Average between 20'C and 80'C Thermal decomposition temperature 330 Product TGA (in air) Volume resistivity 3.6×10 Plate JIS K 6911 (500 V) Dielectric constant 2.9 Plate JIS K 6911 (1000 Hz) Dielectric loss tangent 0.02 Plate JIS K 6911 (1000 Hz) Whole light transmission 86.0% Plate JIS K 6714 (2.3 mm) Cloudiness 3.5% Plate JIS K 6714 (2.3 mm) Refractive index 1.57 Plate ASTM(Abbe R. I.) Volatile matter 0.6% Product JIS (105 x 1 hr) Chemical resistance Weight change Form of test piece Weight change after 10 day immersion at 20'C Water 0.5% Plate 2 mm, 1g, ion free water NaOH -0.2% Plate 2 mm, 1g, 1/10 N IPA 1.1% Plate 2 mm, 1g, 100% N-MP 0.0% Plate 2 mm, 1g, 100% Acetone 1.0% Plate 2 mm, 1g, 100% HCl 0.4% Plate 2 mm, 1g, 1/10 N Ion content / SP   Form of test piece Analysis method Na <=2PPM Product Atomic absorption spectrometry K <=1PPM Product Ditto Ca <=1PPM Product Ditto Fe <=2PPM Product Ditto Cl <=1PPM Product Extraction by ultrapure water for 1 hr. at 90'C.Ion chromatography.

*The above values are not the standard values but for reference only.

The spacer can be customized according to various requriement of clients. Please contact us for details, using this form.