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ATEX and IEC Ex Flame-proof Explosion Proof Lighting & Equipment
Explosion Proof Lights
Explosion Proof Motors - Motors for Hazardous Locations
Industrial and Vaporproof Emergency Failsafe Lighting
Industrial Cord Reels and Tool Taps
Industrial Work Area Heaters
Machine Vision Lights
Megatowerâ„¢
QC Series Industrial Portable Lighting - Quick Change Mount
Rig Lights
Stadium lights
String Lights and Temporary Light Stringers
Tank Cleaning Lights
Three Phase Motor Soft Starters
Vapor Proof LED Lights
Variable Frequency Drives (VFDs)
Vehicle Mounting Plates
Workboat Light Fixtures & Lighting Equipment
Yacht Engine Room Lights
Color Changing LED RGB Lighting
Explosion Proof Cord Reels
GOLIGHT Spotlights
Larson FUTURE - Lease Lighting
Remote Area Lighting and Scene Lights
Utility Bucket Mount, Receiver Hitch & Trailer Mount Lighting
Aevum Control Lighting and Equipment - IIoT
Butane and Solvent Extraction Room Lighting and Equipment
DC to DC Transformers and Power Supplies
Explosion Proof Fans & Blowers
Explosion Proof Paint Spray Booth Approved Lights
Explosion Proof String Lights
Explosion Proof Switchgear & Controls
Fleet Service Lights and Lighting Equipment
Industrial Equipment Trailers
Industrial Handlamps & Droplights
ISO 14644/FS-209E Clean Room Lighting
LED Blasting Lights
Night Time Fishing Lights
Portable AC Power Supply Units
Portable Power Distribution Panels
Power Distribution Panels with KVA Transformers
Self-Contained Lighting
Service Pit Lighting
Solar Generators & Solar Powered Lighting
Agricultural Farm Equipment Lighting & Beacons
Explosion Proof Cameras & Surveillance Systems
Explosion Proof Emergency Lights
Explosion Proof Heaters
Garage & Gas Station Canopy Lights
LED Grow Lights
LED Lights
NDT Ultraviolet Lights
Portable Hazardous Location Lighting
Radio Communication Towers and Equipment
Salt Water Processing Equipment
Shelter & Tent Lighting
Thermal Monitoring Cameras and Systems
48V LED Equipment Lights
ATEX Rated Explosion Proof Lights
Automotive Lighting
Class Rated Signals, Alarms, and Systems
Hazardous Location Area Lights and Portable Lighting
HID Equipment Lights
Hot Work Permit Lighting and Equipment
Hunting Lights
Industrial lasers
Industrial Transformers
Light Towers
Outdoor Lighting
Remote Security and Surveillance Systems
Temporary Construction Lights
Vehicle Mounted Spotlights
Equipment & Heavy Machinery LED Light Package Fitouts
Phase Converters - Single to Three Phase
Marine Shore Power Cords and Equipment
24 Volt Military Lights
Disaster Relief / First Responders / Search & Rescue Lighting
Plastic Handcuff Key
110/120 Volt Flood Lights
Post Mount Spotlights
Magnetic Work Lights
Crank-up Light Masts
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Intrinsically Safe Lights
Military Flashlights
LED Waterproof Lanterns
Work Area Lights
12 Volt Flood Lights
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Boat Spotlights
New Boat Lights
HID Boat Lights
Boat Dock Lights
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Remote Control Lights
Control Lights
Tow Lights
Magnetic Control Lights
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NEW Lights and New Products
Evaporative Coolers
Police Equipment
AC/DC Transformers
Power Supplies
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Military Spotlights 24V
Infrared Filters, Covert Covers, and Blackout IR Lenses
Military Equipment
Ultralife Batteries
Remote Control Pan Tilt Base
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Larson Electronics Spotlights
Larson Electronics Parts
Replacement Lamps
Cords - Brackets
Portable Wheeled Generators
Non-Hazardous Location Extension Cords / Plugs / Outlets
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HID Work Lights
HID Dive Lights
HID Off Road Lights
Acro Lights HID Lights
Halogen Lights
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Acro Light Flashlight
Xenon HID Flashlights
Powerlight Flashlight
HID Flashlights
Xenon Flashlights
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LED Status Lights
Forklift Lights
Tractor Lights
HID Post Mount Lights
Roof Mount Lights
Post Mount Light parts
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Flashlight Holder
Magnet Spotlight Base
Tripods-Magnetic Base
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Recharging Spotlights
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LED Street Lights
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Hazard Lights
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Strobes & Beacons
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Headlights - Headlamps - Hard Hat Lights
Flashlights
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Suction Mount Lights
Magnetic Spotlights
12/24 Volt Spotlights
Gifts For Men
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New 12 / 24 Volt Lights
Explosion Proof Accessories and Replacement Parts
Explosion Proof Lighting
Explosion Proof Hand Lamps (Drop Lights)
Explosion Proof Lights - Stand/Dolly
Explosion Proof Tank Lights
Explosion Proof Phones and Intercoms
Explosion Proof Extension Cords
Black Friday & Cyber Monday Specials
Crane Lights
Explosion Proof Light Rentals
General Light Rentals
Light Tower and Light Plant Rentals
Power Distribution Rentals
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Power Plant Lighting
Refinery lights
Environmental Services Lights
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Chemical Plant Lights
Food Grade Safe Lights
Film and Entertainment Lights
Handheld Meters and Devices
Waste Water Treatment Lights
Mining Lights
Ship Yard Lights
Work Site Lighting
         

   
03/06/17 Passing UV Light with Acrylic

Article - March 6, 2016 By LarsonElectronics.com

480 Watt High Intensity LED Light - 60,000 Lumens - Stud Mount Light Head w/ Control Handles

Passing UV Light with Acrylic

Ultraviolet (UV) light has contrasting effects on plastics and glass, depending on the properties of the material. Acrylic is a widely used thermoplastic in mainstream and industrial sectors for lightweight covers, replacements for traditional glass and protective barriers. Read on to learn about the robust properties of acrylic and its applications in marine environments, security and commercial lighting.


What is Acrylic?

Acrylic is a transparent sheet that is and composed of Methyl Methacrylate (MMA) and Poly Methyl Methacrylate (PMMA) resin. PMMA, also known as acrylic glass, can be broken down into the following types: extruded and cast. Extruded (or continuous cast) acrylic is manufactured by pushing the liquid plastic through rollers, where it is pressed and cooled down. This results in an impure acrylic variant that is softer and more prone to scratching, than cast acrylic. Cell cast acrylic is produced by pressing liquid plastic in a mold (usually made of glass). The final product is considered to be more expensive, compared to extruded acrylic, but is also more durable.

Compared to standard glass, the material is up to two times lighter; and at a thickness between 25 mm and 35 mm, it is bullet-resistant. Examples of this type of application can be seen in presidential escort vehicles, the pope mobile and armored transportation vessels. Acrylic does not degrade rapidly (turn yellow or brittle) and can last for several decades without showing signs of deterioration.

Perhaps the most advantageous property of the thermoplastic (for manufacturers) is its ability to be shaped. Cast acrylic can be machined to take on specific sizes and configurations. When customizing structures, manufacturers could create acrylic-based products without seams via chemical welding- resulting in one, solid piece. Mainstream applications of the material includes shower doors, windows and skylights.


Acrylic and UV Light

UV light has very little effects on acrylic, making it ideal for outdoor applications. The material can withstand persistent UV exposure for long periods of time. Acrylic glass is capable of transmitting UV bands, as low as 300 nm. This is relevant because irradiation by visible light between 400 nm and 500 nm has been proven to cause slight color fading and insignificant structural damage. UV bands between 300 nm and 400 nm can lead to similar, but more damaging effects. As wavelengths continue to get shorter, the damaging effects of UV light increases. Hence, UV irradiation at 300 nm is up to 200 times more dangerous, compared to blue-green light bands at 500 nm.

Acrylic boasts a refractive index standard of 1.49 to the sodium D line. This allows the panel to transmit up to 92 percent of light during application (with eight percent reflectance loss). The material absorbs short wavelengths of light in the UV range, while allowing longer wavelengths in the visible light spectrum to pass through.

Compared to plastics with thin, protective UV-resistant layers or coatings, acrylic-based sheets are thicker and more stable. Manufacturers may apply additives to the panel to promote UV absorption, when used for architectural or marine products. In the car manufacturing industry, acrylic is utilized during the production of rear tail-lights due to its ability to display colors accurately and resilient resistance to weathering, including UV light.


Acrylic versus Polycarbonate

In optical applications, acrylic is often paired against polycarbonate. When comparing light transmission rates, acrylic is more efficient (92 percent light transmission rate, as mentioned earlier) with polycarbonate only reaching up to 88 percent light transmission rate- and a refractive standard of 1.585. It is important to consider that manufacturers may increase light transmission levels of polycarbonate (in some cases, as high as 98.5 percent) by adding special coatings.

Polycarbonate is incredibly durable, but the material is prone to scratching at the surface. Acrylic offers better abrasion-resistant properties than polycarbonate, though coatings may also be applied to the latter material to reduce damage from scratching. Such coatings may improve the lifespan of polycarbonate sheets up to 25+ years for high-quality variants. Unlike glass, unsightly scratches on acrylic surfaces can be buffed out.

In high temperature environments, polycarbonate offers more resistance with a heat distortion temperature rating of 264 degrees Fahrenheit. Acrylic supports a heat distortion temperature rating of 200 degrees Fahrenheit under a load of 260 psi, but does not actually melt until 320 degrees Fahrenheit. Such properties suggest that polycarbonate is suitable for applications in structures that require stability. Furthermore, heat stability plays a salient role in the efficiency of various coatings. Hence, it is possible to incorporate more conductive layers or surfaces to polycarbonate.





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