At present, there are mainly two kinds of lens materials used in LED injection molding modules, namely PMMA and PC. Both are optical grade materials. In the eyes of ordinary people, the difference between the two is not much, and they are very similar. They can be used with each other in some common LED lenses, but after all, the two materials are different, and the difference is still relatively large. The following is a simple analysis.

PMMA is commonly known as acrylic, and English is ACRYLIC. It is a chemical material. The chemical name is polymethacrylate, and the raw materials of acrylic in the application industry generally appear in the form of particles, sheets, pipes, etc. Acrylic, also known as plexiglass with special treatment, is a substitute for plexiglass. The LED injection molding module made of acrylic has the characteristics of good light transmission performance, pure color, rich color, beautiful and smooth, taking into account both day and night effects, and long service life. . The following are some characteristics of PMMA.

1. The lens material of the LED injection molding module is PMMA with excellent transparency: colorless and transparent plexiglass, with a light transmittance of more than 92% (high-end imported materials can reach 95%)

2. Excellent weather resistance: It has strong adaptability to the natural environment, even if it is exposed to sunlight, wind and rain for a long time, its performance will not change, and its anti-aging performance is good.

3. The lens material PMMA of LED injection molding module has good processing performance: easy thermoforming and convenient design.

4. Non-toxic Even if it is in contact with people for a long time, it is harmless, but formaldehyde and carbon monoxide will be produced when the combustion is incomplete.

The lens material PC of the LED injection molding module is mainly composed of polycarbonate. The PC material is resistant to neutral oil, strong acid, and alkali. It needs to be coated with UV. However, it is resistant to high temperature, and has the characteristics of high transparency, light weight, impact resistance, sound insulation, heat insulation, flame retardancy, and anti-aging. It is a high-tech, extremely comprehensive performance, energy-saving and environmentally friendly material. The following are some characteristics of the lens material PMMA for LED injection molding modules.

1. The impact resistance of PMMA, the lens material of the LED injection molding module: its impact force can reach up to 3kg/cm3, and its specific gravity is 1.34g/cm3, which is 200 times that of ordinary glass and 8 times stronger than that of PMMA. It has special impact resistance. obvious.

2. Transparency of PMMA lens material for LED injection molding module: excellent lighting, light transmittance as high as 75~89%, and its transparency is comparable to that of ordinary glass.

3. Weather resistance of PMMA lens material for LED injection molding module: adding UV agent (anti-ultraviolet) on the surface can absorb ultraviolet light and convert it into visible light, and it can be guaranteed not to fade for ten years outdoors.

4. PMMA flame resistance of the lens material of LED injection molding module: the material itself is not self-igniting and has self-extinguishing property.

5. The heat resistance and cold resistance of PMMA lens material for LED injection molding module: generally within the test range of minus 30℃ to 120℃, the product will not deform.

In summary, we can further understand the characteristics of PMMA and PC materials, and can choose the most reasonable material according to the characteristics of the product when designing the LED lens.

The above is the introduction of the difference between the lens materials PMMA and PC of the LED injection molding module. If you need more detailed information on the lens materials PMMA and PC of the LED injection molding module, please consult Shenzhen SUNLITE Optoelectronics Co., Ltd. Wright Optoelectronics Co., Ltd. is a high-tech enterprise dedicated to the research and development, production, sales and service of LED light box lighting, sign lighting and decorative lighting products. Our website is http://en.sunlite-led.com, welcome to consult.