Unlock instant, AI-driven research and patent intelligence for your innovation.

Preparation method of graphite substrate LED (light-emitting diode) heat conduction material

A technology of graphite base material and thermal conductive material is applied in the field of composite material manufacturing for high-power LED heat dissipation, which can solve the problems of high temperature resistance, aging resistance, unsatisfactory impact insulation performance, high temperature, and high-power LED heat generation.

Inactive Publication Date: 2013-07-17
四川瑞安特电子技术有限公司
View PDF1 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are two factors that easily lead to damage to the encapsulated LED lamp. One is that due to the existing technical limitations, 80% of the electric energy of the LED chip is converted into heat energy, which causes the high-power LED to generate heat during use, and the operating temperature of the light source is very high. , the heat-conducting material is required to be used above 100°C for a long time without affecting the insulation performance; second, the instantaneous temperature of the high-power LED light source is as high as 260°C during welding, and the short-term high temperature cannot damage the heat-conducting material, and the insulation performance and mechanical strength should not be too high. large attenuation
[0006] The traditional encapsulating plastic is ordinary nylon reinforced modified material. The modified composite material based on nylon is relatively unsatisfactory in high temperature resistance, aging resistance, impact resistance and insulation performance. It is often not easy to withstand short-term high temperature up to 260 ℃, which will lead to the reduction of aging insulation performance and even the failure of lamps and lanterns

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Preparation method of graphite substrate LED (light-emitting diode) heat conduction material
  • Preparation method of graphite substrate LED (light-emitting diode) heat conduction material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Use 35kg of branched polyphenylene sulfide resin thermoplastic materials with a weight average molecular weight of 200,000 and a melt index of 50g / 10min, 10kg of pretreated aramid 1414 polyaramid pulp, and a pulp fiber length of 0.5mm. A good particle diameter is the formula of 20kg of graphite powder of 5nm, after adding in the mixer and stirring at a high speed for 3 hours, then the long fibers of 30kg fiber diameter of 30%wt pretreated glass fiber material are input into the twin-screw extruder, and finally After kneading and extruding by a co-rotating twin-screw extruder, cooling, pelletizing, and packaging, a graphite-based LED heat-conducting material is produced.

Embodiment 2

[0032] Use 30kg of branched polyphenylene sulfide resin thermoplastic material with a weight average molecular weight of 300,000 and a melt index of 30g / 10min, 10kg of pretreated aramid 1313 polyaramid pulp, and a pulp fiber length of 2.0mm. 25kg of processed graphite powder with a particle size of 10nm was added to the mixer and stirred at high speed for 3 hours, then 35kg of pretreated glass fiber material and long fibers with a fiber diameter of 25μm were input into the twin-screw extruder, and finally passed through the same direction Mixing and extruding with a twin-screw extruder, cooling, pelletizing, and packaging to produce a graphite-based LED heat-conducting material.

Embodiment 3

[0034] 32kg of branched polyphenylene sulfide resin thermoplastic materials with a weight average molecular weight of 250,000 and a melt index of 38g / 10min, 12kg of pretreated aramid 1414 polyaramid pulp, and a pulp fiber length of 1.0mm were used. The formula of 22kg of graphite powder with a particle size of 6nm is processed, and after being stirred at a high speed in the mixer for 3 hours, then 34kg of long-fiber glass fiber material with a fiber diameter of 15μm that has been pretreated is input into a twin-screw extruder, and finally passed through the same process. Mixing and extruding to a twin-screw extruder, cooling, pelletizing, and packaging, a kind of LED heat-conducting material with graphite as the base material is prepared.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
particle diameteraaaaaaaaaa
lengthaaaaaaaaaa
diameteraaaaaaaaaa
Login to View More

Abstract

The invention discloses a preparation method of a graphite substrate LED (light-emitting diode) heat conduction material. The method comprises the following steps: adding 15-10wt% of aromatic polyamide pulp with the fiber length of 0.5-2mm and 35-30wt% of thermal plastic resin material into 20-25wt% of powder graphite substrate with the particle size of 5-10nm, mixing, extruding, molding, cooling, dicing and molding with 30-35wt% of glass fiber by a homonymous dual-screw extruding machine, thereby preparing the LED heat conduction material taking graphite as a substrate. The LED heat conduction material prepared by the invention has certain heat conduction performance and favorable mechanical intensity, and can be widely applied to electronic appliances, military industry, space flight and aviation, electronic communication and the like which need heat conductivity or electronic shielding materials, and especially as the LED heat conduction material, the heat radiation performance of an LED at high temperature is improved, and the service life of the LED is prolonged.

Description

technical field [0001] The invention belongs to the field of manufacturing composite materials for heat dissipation of high-power LEDs. Background technique [0002] High-power LED solid-state lighting is the most important lighting revolution since the invention of the incandescent lamp. Semiconductor LED materials can directly convert electrical energy into light energy, which is the biggest difference from traditional lighting sources. It has high luminous efficiency and energy consumption is only one-eighth of ordinary incandescent lamps; long life; no flicker, no infrared and ultraviolet radiation and It does not contain mercury elements, etc., and is a typical energy-saving, green and environmentally friendly lighting. [0003] With the advancement of technology and the continuous expansion of market scale, the power density and luminous efficiency of a single high-power LED are constantly improving, and higher requirements are also put forward for high-power LED heat...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C08L67/00C08L77/00C08L77/06C08L81/02C08K9/06C08K3/04C08K7/14
Inventor 宋大余宋小春苏心桐
Owner 四川瑞安特电子技术有限公司