Glass Balls

Our glass balls are classified into soda glass balls and optical glass balls. Based on the growth of the plastic materials, the existence value of the glass balls has been declining.
However, recent environmental and recycle issue has triggered the improvement of the glass material.
Glass balls
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Types of Glass Balls

Soda Glass balls  

◆Soda Glass balls
Soda glass is the most common glass and is used in a variety of items such as windowpanes, glass bottles, dishes and many other glassware.
Soda glass balls are used for plastic bearings, stirring balls in closed containers, etc.
It also has features such as chemical resistance and heat resistance.


Characteristics of Soda Glass
Characteristics Unit
Density g/cm3 2.5
Hardness Mnoop hardness 5 - 6.5
Softening Temperature 720 - 730
Thermal Conductivity Cal/m・h℃ 0.68
Linear Expansion Coefficient x10-6/℃ 8.5 - 9.0
Compressive Strength kg/cm2 6000 - 12000
※ Listed values are measured, it is not a guaranteed value.

Optical Glass balls   ◆Optical Glass balls
Based on the growth of opto-electronics and optic fiber, optical glass are used as the ball lens for the optical branching filters and optical insertion devices.
Optical glass balls are manufactured by the glass with various compositions for the optical usages.
One of the characteristics of optical glass is constant purity.
It does not have the defects such as air bubbles and striae that prevent the optical transmission and refraction.
Optical glass balls are used in a wide variety of areas such as ball lenses, sensors, joints for optic fiber, blanks of aspheric lenses.


Optical Glass Comparison Chart
Characteristics/Form BK-7 EC-GLASS B270
Refractive Index 1.516 1.523 1.523
Density 2.52 2.50 2.55
※ Listed values are measured, it is not a guaranteed value.