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The typical used of silicone solutions in LED lighting

LED is the most energy-efficient illuminator in today society , it has been widely used in household, urban, industrial, automotive, aerospace and many other fields. As China is the base of  global electronics manufacturing , it has accounted for more than 50% of the global LED industry business. It has formed a relatively complete industrial chain including the production of LED epitaxial wafers, the preparation of LED chips, the encapsulation of LED chips and the application of LED products.

Silicone plays an very important role in the LED lighting production process.  Silicone products and its application technology determine the performance of the entire LED product quality,.Thus ,select the right business LED manufacturing enterprises directly affect the quality of the LED product. Shenzhen Tensan Industrial Co., Ltd. is  a high-tech enterprise with years of experience in LED lighting application industry ,We are happy to share with   the typical application of silicone in LED lighting products .

 

The main application of adhesives in LED lights


Adhesive seal for Lamps frame

potting,water proof,thermal conduction and protection

To assist aluminium substrate radiating

Driving power’s thermal conducting and flame retardant

The Three Protection for circuit board

 

01.Silicone used in LED Street Light

The mainly use company : SPARK

The adhesive between the lampshade,panel and frame

Substrate: PMMA or glass mask plastic panel with aluminum frame.

 Requirements: Strong bond don’t corrode PMMA, well bonding between mas,k and aluminum frame , high thixotropy, no drooling.  Anti-aging, strong insulation . Small stress, moderate hardness,elongation at break is more than 120%. No embrittlement after solidify .

 

The normal silicone color : withe ,black single component silicone

The main manufacturers : Dow Corning , Shenzhen Tensan Industry

Recommend Type TS6603 TS6605   7091

Thermal conduct and adhere  between LED aluminium substrate and plate metal

Requirements: Excellent thermal conductivity;

               Excellent electrical insulation;

Wide operating temperature: operating temperature from

-50~ 200 ℃;

Currently ,the  thermal grease is the main application in the market, but with the efficiency requirements, more and more companies began to use thermal pads, thermal graphite sheet.That is because even thermal grease has advantages of the  quickly use, fast cooling characteristics,  long-term use will lead to volatility thermal conductivity decreased.

Disadvantages of thermal grease: not so easy to operate it .

Thermal pads is better on cooling and stability, but the initial effect is not as good as thermal grease. Howerver , it is easy to use, long-term durability.

 

Application products: Thermal grease , thermal pads, thermal graphite pad.

The main manufacturers : Dow Corning , Shenzhen Tensan Industry.

Recommend productsThermal grease : TS1103/TS1008

Thermal pads TS200 /TS300  , 1-1577LV

( According to the Street lights’ power rate )

Power’s thermal conducting and potting

LED street light power plays an important role in the LED lights . However, LED street light manufacturer dont produce the power ,they buy it from other company .

Requirements: Excellent thermal conductivity;

              Excellent electrical insulation;

Wide operating temperature: operating temperature from -50 ~ 200 ℃;

Deface non-solidify,Non-toxic, tasteless, non-corrosive, environmentally   friendly;Good liquidity, good bubble row, good operability;

Fame retardant rating:UL standard, Waterproof standard : IP65 - IP67.

 

The main manufactures in China: MW,Inventronics .MOSO

There are two big kinds of potting silicone in the market: One is 1:1 Power potting silicone ,which is the main trend in the market. Its advantage is good operability and can heat curing. But the bad point is no cohesiveness. Another type is 10:1 power silicone , this one has strong bond for aluminum.

The main manufacturers of this silicone : Dow Corning , Huitian,Shenzhen Tensan Industry.

Recommend Type : Dow corning 7660,Huitian 160 ,TENSAN TS8833

02.   Silicone used in LED hurdle lamp

LED hurdle lamp had been very common the city lighting , but with the development of wall lights, it becomes less and less.

 Adhesive seal between  end caps and PC

Requirements:Don’t correde PC,Good cohesiveness,fast solidity,no foggyRecommend:Dealcoholize transparent one component silicone---TS6601

 03.  Silicone used in light bar

Light bar is divided into hard light bar and soft light bar. And Soft bar contains full cover tube,half cover tube and no cover tube . Thus different demands request different silicone .     

The requirements for light bar are:the color shift is small ≤800k;Good cohesiveness,good sealing performance;Good toughness of adhesive layer ,no cracking;Not yellowing , Anti-aging.It should be 10:1 transparent silicone potting,low refractive index.

Soft light bar end cap adhering

Requirements: Excellent cohesiveness,Fast solidity .

Recommend: TS9988 ( TENSAN Limited company )

04.   Silicone used in LED Bulb

Lamp cap.lens) Structure adhering

 Lamp holder boding : Bonding and sealing for metal and PC/PMMA . Lamp shape divide into glass or PC, thus for different material , the requirement for silicone is different. If the lamp share is transparent, the requirement for glue is more strict in order to prevent foggy .

Mail manufactures of LED Bulb : Philips

Recommend silicon: Tensan company , TS6603

 Built-in power thermal conducting and potting

  Requirements: Excellent fire resistance and excellent thermal conducting ; Fast solidity; Could be deep solidity ;High temperature aging, low stress; mobility and good bubble row, so that the silicone can penetrate the tiny components gap.

Recommend silicon: Tensan company , TS8811

Thermal conducting and adhering of LED light source and Alloy

Requirements: High thermal conductivity ,good cohesiveness. 

Recommend silicon: Tensan company , TS5505

Three Protection for PCB board

 Requirements:  Low viscosity, whichis  suitable for coating process, protecting components.

Recommend silicon: Tensan company , TS102

 05.Silicone used in T5/T8 Tube   
 
Tude is the most widely used LED applications, the traditional fluorescent lamp has been completely replaced by LED lamp. The quantity of tube production is very huge, and it request high manufacturing efficiency . However, the traditional technology, the use of silicone, slow curing, lead to follow-up efficiency of testing , packaging lamps greatly reducing . To solve this issue, T5/T8 tube solution applications are specially developed . The main difficulty in Tube silicone is the the plug silicone.If the plug silicone curing speed is fast , it results in hard power, the next step test and packaging will greatly speed up.

A, two-component heating program

Use Tensan two-component silicone, 1: 1 mixture, sizing the plug, and then bonding with the glass tube , only heating 120 ° on the plug part , about 30 seconds to continue the next step: torque test,if the test passes, then package.

B, low temperature single-component silicone heating program

To use low temperature single-component silicone, the silicone must be stored at low temperature, single-component use, and then heat curing. About 1 minute later to test and package.

 Adhering and fixing light board
Requirements: The glass tube is divided into  glass tube with a phosphor and  glass tube with a thin film. Different materials have different requests on silicone. Dusting glass tube requires silicone can not have corrosive effect, or else it will  affect the luminous efficiency.

Recommend silicon: Tensan company , TS6603

06.   Silicone used in LED Driving power 
Power waterproofing mainly use silicone, polyurethane and epoxy. Due to the rise in raw materials for silicone recently, some companies started to use polyurethane again. But Polyurethanes and silicone  have their own advantages. At the beginning of the power supply, the polyurethane represented by Weifu was the mainstream in the market. Later, with the use of Dow Corning‘s 8760, more enterprises began to use silicone.

Power LED lighting in a decisive role in LED lighting . Power is divided into outdoor power and indoor power supply.But only the kitchen and bathroom lighting’ power needs silicone potting , the other indoor power is not .

The main manufactures of street light power in China :MW,Inventronics .MOSO

There are two big kinds of potting silicone in the market: One is 1:1 Power potting silicone ,which is the main trend in the market. Its advantage is good operability and can heat curing. But the bad point is no cohesiveness. Another type is 10:1 power silicone , this one has strong bond for aluminum,good waterproof .But it is slow solidity and can not heat curing.

 The main manufacturers of this silicone : Dow Corning , Huitian,Shenzhen Tensan Industry.

Recommend Type : Dow corning 7660,Huitian 160 ,TENSAN TS8833 

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