Specialized optical, medical and other applications need light to be blocked in a specific wavelength range. Master Bond custom formulates versatile adhesives that offer precise light blocking for use in such unique applications.
Light is an electromagnetic wave with varying wavelengths and frequencies. Light visible to our naked eyes typically lie in the wavelength range of 400nm - 750nm. However, there are many other forms of light that are invisible to human eyesight. The figure below explains the different light forms and their respective wavelength ranges.
Increasing Wavelength
| 1pm – 1nm | 1nm - 400nm | 400nm - 750nm | 750nm – 25µm |
| X Rays | UV | Visible | IR |
Our products can offer effective blocking over the entire spectrum. However, with use of special fillers, we can achieve selective blocking in the UV range while giving superior transmission in the visible and IR wavelengths. Filtering UV light can be very critical in sensitive applications for use in optical, healthcare, food and various other OEM industries.
Additionally, with the use of radiopaque fillers like barium sulfate, our adhesives can actively block X-rays. This is extremely useful, especially in the medical and diagnostics industries where achieving good contrast and sharpness is crucial for fluoroscopy and x-ray imaging.
Most Popular Light Blocking Polymer Systems
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EP30-2LB Optically clear epoxy that blocks UV light from 200 nm to about 400 nm. Transmits well from 450-900 nm and above. Structural adhesive. Passes NASA low outgassing tests. Electrical insulator. Cures at room temperature. Epoxy flows smoothly. Dimensionally stable. Low shrinkage upon cure. Serviceable from -80°F to +300°F. |
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EP30FLSP Low viscosity flexibilized two component epoxy resin system. Serviceable from 4k to +250°F. Well suited for potting and encapsulation. Moderately low exotherm. Good peel and shear strength. Adheres well to similar and dissimilar substrates. Resists mechanical shock, vibration and thermal cycling. |
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EP42HT-2LTE Ultra low coefficient of thermal expansion. Two component, room temperature curing epoxy. Reliable electrical insulator. Unsurpassed dimensional stability. Low linear and volumetric shrinkage upon cure. Serviceable from -60°F to +300°F. Withstands 1,000 hours 85°C/85% RH. |
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EP21BAS Two component, room temperature curing, radiopaque epoxy adhesive, sealant and coating. Employed for medical diagnostic and therapeutic devices. Effective for even 100 KV, px-ray (peak x-ray) machines and higher energy capacities. Convenient one to one mix ratio. High bond strength. Superior electrical insulation properties. Serviceable from -60°F to +250°F. |
