PC Diffusion Plate

Rina Technology Co., Ltd. is one of the leading manufacturers and suppliers of pc diffusion plate in China. Welcome to wholesale durable products in stock here and get quotation from our factory. All customized products are with high quality and low price.

 

Product Name:

Customized opal Frosted Board High Transmittance PC Diffusion Plate

 

Production Process
1. Raw Material Preparation
Material Selection:
Use polycarbonate (PC) granules with high light transmittance and good weather resistance, such as Bayer's Makrolon®.
Add a diffusing agent (such as silica, silicone microspheres, or acrylic microparticles) to achieve a light-scattering effect, typically at a ratio of 1%-5%.
Optional additives such as UV inhibitors and flame retardants may be added to enhance performance.
Drying:
PC granules are hygroscopic and require drying at 100-120°C for 4-6 hours to prevent hydrolysis, bubbles, or degradation during high-temperature processing.

2. Extrusion (Core Process)
Melt Extrusion:
The dried PC is mixed with additives and fed into a twin-screw extruder. The temperature is controlled in stages (e.g., 200°C in the feed section, 250°C in the melt section, and 280°C in the die section).
Screw speed and temperature must be precisely controlled to prevent material degradation and uneven distribution of the diffusing agent. Die Design:
A coat-hanger flat die (T-die) is used to ensure uniform melt flow.
The die lip gap is adjusted according to the sheet thickness (typically 0.2-1.0mm), and the surface is polished to a mirror finish to minimize flow marks.
Calendaring and Cooling:
The melt is flattened and shaped using a three-roll calender (80-100°C), with the roll speed synchronized with the extruder speed.
Step-by-step cooling (air cooling + water cooling) is used to prevent internal stress. After cooling, the sheet enters the haul-off machine.

3. Surface Treatment (Diffusion Structure Formation)
Microstructuring:
Embossed: Micron-scale concave and convex patterns (such as prisms and frosted grains) are applied to the sheet surface using embossing rollers.
Coating: A UV-curable resin containing diffusion particles is applied and cured by UV light to form a scattering layer.
Coextrusion: The diffusion layer and substrate layer are simultaneously compounded during extrusion to improve durability. Optical Testing:
Optical properties are tested using a haze meter and a light transmittance meter (typically haze 80%-90%, transmittance >70%).

4. Post-Processing and Quality Control
Cutting and Trimming:
Sheets are cut using a CNC cutting machine and the edges are deburred as needed.
Performance Testing:
Mechanical Properties: Impact resistance (e.g., a 1kg steel ball dropped from 1 meter) and flexural strength are tested.
Weather Resistance: UV resistance is evaluated using a QUV aging test.
Fire Rating: UL94 flame retardancy test (e.g., V-0).

Packaging:
The surface is covered with a protective film to prevent scratches and moisture-proof packaging.

Product Information:  

It's an Opal white PC product with a matte surface on one side or both sides specifically designed for LED panel light , downlight and so on. It features a unique combination of high light diffusion and high light transmission through a combination of optimized surface texture and advanced diffuser technologies. When compared to other diffusing products such as glass and PS, and Acrylic sheets, PC diffuser has superior impact strength and toughness. It's character can be described as following:

1.Efficiency

Diffuser sheet enable high efficiency extraction of light from a luminaire without sacrificing performance. Transmission well in excess of 90% is typical, and luminaire dependent efficiency can be even higher.

2.Light source hiding ability

Lighting diffusers offer outstanding hiding of LED and fluorescent light sources, with excellent color mixing. The diffusers solve the most difficult LED hiding problems while maintaining excellent efficiency.

3.Inreases light uniformity throughout the lighting diffuser;

4.Simplify design consideration for new fixtures and for retrofit conversions to LED's;

5.Choose the best option for different fixtures' performance requirements.

Product Display

Manufacturing equipment

Manufacturing process

About US

 

 

Certificate authority

Shipping And Payment

FAQ

1. What is a PC diffuser sheet?

PC diffusers are optical sheets made from polycarbonate (PC) with a light-diffusing agent. They convert point or line light sources (such as LEDs) into a uniform, soft surface light source, reducing glare. They are milky white and translucent, with a light transmittance exceeding 80%.

 

2. What are the core advantages of PC diffuser panels?

High Impact Resistance: 250 times stronger than ordinary glass and 150 times stronger than tempered glass, shatter-resistant (110%).

Lightweight and Weather-Resistant: Density is only half that of glass, and it can withstand temperatures ranging from -40°C to 120°C.

Flame Retardant and Environmentally Friendly: UL-94 V0/V2 rated flame retardant, non-toxic when burned.

UV Protection: Contains an anti-UV coating to extend service life by 510%.

 

3. What is the relationship between light transmittance and haze?
The two are inversely proportional: the lower the content of diffusing particles, the higher the light transmittance (up to 88%), the lower the haze, and the more transparent the panel. The more particles, the lower the light transmittance, the higher the haze, and the better the shielding properties. A balanced choice should be made based on the application scenario.

 

4. What are the main applications?
It is widely used in LED lighting (panel lights, downlights), advertising light boxes, LCD TV backlights, outdoor displays, and skylights, achieving uniform light distribution and improving safety.

 

5. What precautions should be taken during installation and maintenance?

Installation: Maintain clearance for thermal expansion and contraction of the panel (holes ≥ 4mm from the edge) and do not remove the protective film until installation is complete.

Cleaning: Wipe with warm water and a soft cloth. Avoid using strong alkalis, harsh brushes, or abrasives.

Hot Tags: pc diffusion plate suppliers, factory, customized, price, in stock