The rapid development of LED industry has greatly promoted the development of upstream materials industry and further promoted the breakthrough of high-end materials.
A large number of plastic parts are used in LED lamps, including LED packaging components, LED optical lens, light scattering components, efficient heat dissipation components, light reflection and light diffuser plates, etc., while thermal conductive plastics are increasingly replacing metal parts in thermal conductivity components of LED lamps, mainly including lamp holder, cooling heat dissipation lamp cup and enclosure.
From the perspective of the whole life cycle, the thermal conductive plastics of organic composite materials are more environmentally friendly, consume less energy than the metal material production, cause less pollution in the production process, and meet the requirements of national energy conservation and emission reduction and energy conservation.
With the improvement of LED luminous efficiency and the reduction of heat generated by LED, the requirements of LED heat dissipation will be gradually reduced, and the heat-conducting plastic radiator will be able to meet the heat dissipation requirements of most conventional LED lamps.
Expect to get relatively rapid development soon, industrial chain division of labor will be further clear.
It is understood that the traditional heat dissipation materials for the housing of lamps and lanterns mainly include the following three types: metal materials, ceramics and general plastics.
Compared with metal materials, thermal conductive plastics are characterized by uniform heat dissipation, light weight, high safety coefficient and flexible shape design.
Compared with ceramics, thermal conductive plastics are firm, convenient to shape and process, and the design degree of freedom is higher.
The expansion coefficient of heat-conducting plastics is higher than that of general plastics.
Compared with traditional metal materials, thermal conductive plastics have many advantages, which can be summarized as follows:
1. The lightweight
The density of pure aluminum is 2700kg/m3, while the density of aluminum alloy is even higher, while the density of thermal conductive plastics is usually 1500 ~ 2000kg/m3. The heat dissipation of thermal conductive plastics can significantly reduce the proportion of lighting products (about 30% ~ 50%), making lighting products lightweight, useful cutting device and indirect cost of transportation.
2. High degree of freedom of planning
The freedom of planning is an outstanding advantage of organic heat-conducting plastics.
The main method of production of aluminum radiators is die casting or stretch molding, in the production process more difficult to carry out a more disorderly shape processing.
And organic plastics are excellent for fluidity, producing thin parts and planning ever more haphazard shapes, and for further lightweight goods.
In addition, the injection molded goods are beautiful and have good finish, which can accomplish the diversification of the product color without the subsequent painting, painting and other processes.
3. Planning mass production
Thermal conductive plastics can be formed at one time, without post-processing, and the production of mass planning is simply completed, and the planning benefits are completed.
Useful cut aluminum in extrusion molding after the removal of raw edge, nickel plating process.
Together, the cost of the mold than aluminum alloy and other data production small, long life, cut processing cycle and cost.
4. Safe and simplified power supply structure
Aluminum radiator because of its high conductivity, if the choice of non - barrier power source is difficult to be tested by high - voltage certification.
The insulation property of thermal conductive plastics has certain advantages in high pressure test, which makes it possible to choose non-blocking power supply lamps and lanterns. It can not only reduce the cost, but also make the product planning more exquisite. What's more, it reduces the potential safety hazard of metal shell electrical conduction in the process of user use.
It is safe and environment-friendly and can be recycled. Good insulation ensures the safety when it is used.
As the Chinese government pays more attention to this issue and increases technological innovation and investment in special materials, LED materials, especially thermal conductive plastics, will have a good application prospect and development space.