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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
Megatower™
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
Aerospace Lights
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
         

   
05/25/17 The State of Thermal Dissipation Plastics for LEDs

Article - May 25, 2017 By LarsonElectronics.com

40W Explosion Proof Low Bay AC LED Fixture - C1D2 - ATEX/IECEX - IP68 Waterproof

The State of Thermal Dissipation Plastics for LEDs

Too much heat can cause lights to malfunction or fail prematurely. For LEDs, high levels of heat are mitigated through thermal-managing components. During operation, the fixture’s heat sink dissipates heat, moving it away from the unit. This movement is done in a continuous manner to ensure functionality.

Initially, LED manufacturers used aluminum for heat sinks. But now, the state of thermal dissipation trends is shifting to a new material: thermoplastics.


Heat Sink Materials and Dissipation Factors

A heat sink’s primary role is to push heat away from the LED fixture. There are several factors that can affect the performance of a luminary’s heat sink. The heat sink’s surface area must be large in order to accommodate the transfer more effectively. Designs that incorporate more fins or wider surface areas are known to boost heat dissipation. The finish of the heat sink’s surface could also affect its efficiency. Painting the surface is known to improve or increase the amount of heat dissipation.

The material used for thermal dissipation in LEDs is crucial to the heat management process. Previously, manufacturers looked to copper due to its high thermal conductivity properties; but quickly found the material to be too expensive to scale for mass production. Stainless steel was also considered at one point, due to its non-corroding features. Unfortunately, it lacked superior conducting properties that other materials supported. Aluminum was a top choice for heat sinks in LEDs, because it had high heat conduction capacity (higher than stainless steel, but lower than copper). The material is also general inexpensive, making it a great option for LED manufacturers that wanted to keep their products affordable for consumers. This development ushered in the proliferation of using aluminum for LED heat sinks in the industry.


Decreasing LED Manufacturing Costs

Thermoplastics is the latest preferred material used for heat dissipation in LEDs. Temperature tests from leading LED technology research institutions suggest that thermoplastics dissipate heat very well. When used on eight-watt and 10-watt LED bulbs, the material can keep the units below 80 degrees Celsius during operation, which is considered to be optimal, based on LED lighting industry standards. Thermoplastics can be applied to a wide range of LED fixtures, such as PAR, candle and high bay lights.

Compared to aluminum, the material offers up to seven times higher radiation ratio, and is specifically suitable to meet the demands and heat dissipation requirements of LED lights. From a manufacturing perspective, thermoplastics can reduce costs by up to 30 percent (at the rate of around $10 per kilogram of thermoplastic). Heat dissipation using thermoplastics is not as proficient as metals. However, manufacturers have been able to design heat sinks using a combination of thermoplastics and aluminum to promote its heat dissipating features.

The costs are greatly reduced during the injection molding stage, where the thermoplastics have a higher production efficiency rate than metals. In order to understand this benefit, one has to know that the process for creating aluminum heat sinks is tedious, and in some aspects, flawed for scaling. The material is required to go through numerous small processes, including polishing, buffing, drilling and anodizing. The complicated process creates bottlenecks during manufacturing. On the other hand, thermoplastics can be created entirely through injection molding, with less wastage and time spent on production.


Thermal Plastics Case Studies

PolyOne, an Ohio-based plastics technology research firm, released two case studies that display the advantages of using thermal plastic components for LED manufacturing. In the first case study, the company teamed up with engineers from Kruunutekniikka Oy of Finland, a contractor that specializes in injection molding for lighting products. PolyOne helped the company design a thermal plastic LED component that is lightweight, cost effective, corrosion resistant, IP67 rated and heat resistant. It also complies with UL94-V0 flammability guidelines.

Results from the collaboration includes the following: 10 percent in savings during manufacturing, less material requirements by up to 37 percent and less time spent on the production line due to the incorporation of injection molding machines. The manufacturer was also able to recycle scraps leftover from the process.

In the second case study, PolyOne partnered with Mars Otomotiv, an automobile lighting parts manufacturer that is based in Turkey. The company encountered issues with using die-cast aluminum heat sinks, which was supplied from a third-party. This required the group to perform tedious customizations, such as surface treatments and drilling holes, before manufacturing. During the study, the team explored non-metal options by converting its in-house metal molding process to accommodate thermoplastics. The project lasted four months, and the duo completed the transition successfully.

The Turkey-based company benefited greatly from the transition, which helped increase productivity levels on the manufacturing line (lead time and on-time order completion). Specifically, the application of thermoplastics reduced the weight of the organization’s products by up to 39 percent. It was also able to increase heat sink production by 50 percent, while decreasing costs up to 20 percent per component.





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