Light Diffuser Sheet
High-Quality nailipu Light Diffuser Sheet - The Preferred Material
in Lighting and Display Fields
NAILIPU Light Diffuser Sheet is mainly made of high-quality polycarbonate (PC), acrylic (PMMA) and PET substrates through special processing technology. It can effectively convert point light sources or line light sources into uniform and soft surface light sources, and is widely used in LED panel lights, grid lights, ceiling lights, commercial lighting fixtures, backlight displays, advertising light boxes and smart home appliance display panels and other fields. This product can greatly reduce light glare, improve visual comfort, and at the same time has excellent light transmittance (some models can reach more than 85%) and light diffusion efficiency, and can achieve different haze (80%-98%) customization according to needs.
NAILIPU Light Diffuser Sheet has a rich product series, including ordinary transparent diffuser sheets, milky white diffuser sheets, UV-resistant diffuser sheets and flame-retardant diffuser sheets. The thickness range covers 0.5mm-10mm, which can meet the installation and use needs of different scenarios. Compared with traditional glass materials, its weight is only 1/2 of glass, and its impact strength is more than 200 times that of glass. It maintains stable dimensional performance and optical performance in a wide temperature range of -30℃-130℃, and is not easy to deform or age. In addition, the product also supports secondary processing such as surface screen printing, cutting, bending and thermoforming, which is suitable for the design requirements of various personalized lamps and equipment.
With more than 10 years of experience in R&D and production of light diffusion materials, NAILIPU has become a core supplier in the field of light diffusion sheets in China. Its serving more than 1,000 customers, covering lighting engineering, electronic display, advertising media and other industries. At the same time, the brand provides customized sizes, special optical parameter adjustments and OEM/ODM services, and can optimize product solutions according to customers’ specific application scenarios to help customers improve the optical effect and market competitiveness of end products.
Light Diffuser Sheet
- High-efficiency Light Diffusion: Converts point/line light sources into uniform surface light, eliminates glare and light spots, with light uniformity ≥85%
- High Light Transmittance: Transmittance ranges from 25% to 60%, low light loss, meeting lighting brightness requirements
- Durable Material: Mostly made of PC/PMMA substrates, with high impact resistance (PC strength is 200x+ that of glass) and anti-aging performance, service life of 5-8 years
- Temperature & Weather Resistance: PC substrate has a heat distortion temperature of about 130℃, works stably at -40℃ to 120℃; UV coating optional for anti-aging in outdoor use
- Easy Processing & Adaptability: Supports cutting, bending, thermoforming, customizable size (1mm-10mm) and texture, compatible with LED modules/light boxes
- Eco-friendly & Safe: Complies with RoHS/CE standards, no harmful substances; some products reach UL94 V0 flame-retardant grade, self-extinguishing when away from fire
Detailed Specification of Light Diffuser
1.1 Material Category
Material Category | Main Component | Application Scope |
Polycarbonate (PC) | High-purity PC resin (compliant with ISO 1043-1:2001 standard) | Indoor/outdoor lighting, LED panels, advertising light boxes (scenarios requiring high impact resistance) |
Acrylic (PMMA) | Methyl methacrylate copolymer (compliant with ASTM D4802-15 standard) | Indoor decorative lighting, small-size backlight displays (scenarios requiring high transparency) |
PET (Polyethylene Terephthalate) | Modified PET resin (compliant with GB/T 17931-2018 standard) | Thin-film backlights (mobile phone screens, membrane switches) |
1.2 Thickness
Product Type | Thickness Range | Tolerance | Thickness Uniformity |
Light Diffuser Sheet | 0.5mm – 10mm | ±0.05mm (for thickness ≤2mm); ±0.1mm (for thickness >2mm) | ≤3% (per 1000mm length) |
Light Diffuser Film | 0.5mm – 1.5mm | ±0.005mm (for thickness ≤0.2mm); ±0.01mm (for thickness >0.2mm) | ≤2% (per 500mm length) |
Custom Profile | 0.3mm – 15mm | Customized per client requirement | ≤4% (per customized length) |
1.3 Size
Product Form | Standard Size | Custom Size Range | Size Tolerance |
Panel (Sheet) | 1220mm×2440mm, 1000mm×2000mm | Width: 300mm – 2000mm; Length: 500mm – 3000mm | ±2mm (width/length) |
Roll (Film) | Width: 300mm – 1200mm; Length: 100m – 500m | Width: 100mm – 1500mm; Length: 50m – 1000m | Width: ±1mm; Length: ±0.5% |
2.1 Light Transmittance
Material | Transmittance Range | Test Standard | Test Condition |
PC Light Diffuser | 60% – 85% | ASTM D1003-13 (Method A) | 550nm wavelength, 2mm thickness |
PMMA Light Diffuser | 75% – 90% | ASTM D1003-13 (Method A) | 550nm wavelength, 2mm thickness |
PET Light Diffuser Film | 80% – 92% | ASTM D1003-13 (Method A) | 550nm wavelength, 0.1mm thickness |
2.2 Haze
Product Grade | Haze Range | Test Standard | Application Requirement |
High Diffusion | 90% – 98% | ASTM D1003-13 | For uniform surface light (LED panel lights) |
Medium Diffusion | 70% – 89% | ASTM D1003-13 | For semi-transparent lighting (decorative lamps) |
Low Diffusion | 50% – 69% | ASTM D1003-13 | For backlight displays (LCD screens) |
2.3 Glare Reduction
Product Type | Glare Index (UGR) | Test Standard | Surface Treatment |
Non-glare Diffuser Panel | ≤19 | EN 12464-1:2011 | Matte coating (Ra: 0.8μm – 1.5μm) |
Standard Diffuser Sheet | ≤22 | EN 12464-1:2011 | Smooth surface (Ra: ≤0.2μm) |
2.4 Color Consistency
- Color Value: CIE LAB coordinates (L*: 92 – 95, a*: -1.0 – +1.0, b*: -2.0 – +2.0)
- Color Tolerance: ΔE ≤ 1.5 (between batches)
- Test Standard: ASTM E313-15
3.1 Impact Resistance
Material | Impact Strength | Test Standard | Test Condition |
PC Light Diffuser | ≥60 kJ/m² (Izod notched) | ASTM D256-10 | 23℃, 3.2mm thickness |
PMMA Light Diffuser | ≥15 kJ/m² (Izod notched) | ASTM D256-10 | 23℃, 3.2mm thickness |
PET Light Diffuser Film | ≥80 MPa (Tensile impact) | ASTM D1822-08 | 23℃, 0.1mm thickness |
3.2 Hardness
Material | Surface Hardness | Test Standard | Test Method |
PC Light Diffuser | ≥HB (Pencil hardness) | ASTM D3363-05 | 750g load |
PMMA Light Diffuser | ≥2H (Pencil hardness) | ASTM D3363-05 | 750g load |
3.3 Tensile Strength
Material | Tensile Strength | Elongation at Break | Test Standard |
PC Light Diffuser | ≥65 MPa | ≥100% | ASTM D638-14 |
PMMA Light Diffuser | ≥70 MPa | ≥5% | ASTM D638-14 |
PET Light Diffuser Film | ≥85 MPa | ≥150% | ASTM D882-18 |
4.1 Temperature Resistance
Performance | Temperature Range | Test Standard | Test Result |
Continuous Use Temperature | -40℃ – 120℃ (PC); -30℃ – 80℃ (PMMA); -20℃ – 70℃ (PET) | IEC 60068-2-1:2007 (low temp); IEC 60068-2-2:2007 (high temp) | No cracking, no deformation, transmittance change ≤5% |
Heat Aging Resistance | 120℃ (PC) / 80℃ (PMMA) for 1000h | ASTM D3045-17 | Tensile strength retention ≥80% |
4.2 UV Resistance
Product Type | UV Resistance Level | Test Standard | Test Result |
Outdoor Grade (UVFPC-DIU) | UV340, 1000h | ASTM G154-16 | Color change ΔE ≤2.0, transmittance change ≤8% |
Indoor Grade (UVFPC-DI) | UV340, 500h | ASTM G154-16 | Color change ΔE ≤3.0, transmittance change ≤10% |
4.3 Chemical Resistance
Chemical | Contact Time | Test Result (PC Material) | Test Standard |
Ethanol (75%) | 24h | No discoloration, no swelling | ASTM D543-14 |
Acetone | 1h | Slight surface fogging (no peeling) | ASTM D543-14 |
Dilute HCl (10%) | 24h | No corrosion, no weight change | ASTM D543-14 |
EXCEPTIONAL FEATURES OF OUR PC DIFFUSER SHEETS
Engineered for optimal performance, our polycarbonate light diffusers offer superior quality andversatility for any lighting application.
UNIFORM LIGHT DIFFUSION
Achieves perfect light distribution withminimal hot spots, creatingcomfortable and evenlyilluminatedspaces.
IMPACT RESISTANT
10 times stronger than glass and 250times stronger than acrylic,ensuringdurability and long service life.
HEAT RESISTANCE
Withstands high temperatures up to120°C, making it suitable for variouslighting environments andapplications.
WEATHERPROOF
Resistant to moisture, UV rays, andharsh weather conditions, ideal forboth indoor and outdoor applications.
EASY TO FABRICATE
Can be cut, bent, drilled, andthermoformed with standard tools,allowing for easy customization andinstallation.
ECO-FRIENDLY
Made from recyclable materials andfree from harmful substances, meetinginternational environmentalstandards.
VERSATILE APPLICATIONS
Our PC light diffuser sheets are designed to excel in a wide range of lighting applications across
various industries.
LED PANEL LIGHTS
Perfect for office,commercial and residential ceiling panel lighting systems.
ARCHITECTURAL LIGHTING
Ideal for cove lighting, light boxes, and decorative architectural features.
SIGNAGE S DISPLAYS
Enhances visibility and appearance of backlit signs,billboards,and display.
AUTOMOTIVE LIGHTING
Used in interior lighting, instrument panels, and indicator lights.
GREENHOUSE LIGHTING
Optimizes light distribution for plant growth in agricultural applications.
STAGE & ENTERTAINMENT
Creates stunning lighting effects for theaters,concerts, and events.
Frequently Asked Questions
Q: What is a PC Light Diffuser Sheet?
A: A PC Light Diffuser Sheet is a specialized sheet made of polycarbonate (PC) material. It has the function of scattering incident light, converting concentrated light into soft and uniform diffused light, while maintaining high light transmittance. It is widely used in lighting equipment and display devices.
Q: What are the main advantages of PC Light Diffuser Sheets compared to other light diffuser materials (such as PMMA)?
A: Compared with other materials like PMMA, PC Light Diffuser Sheets have three main advantages: first, they have better impact resistance, making them not easy to break and more durable; second, they have higher heat resistance, and can maintain stable performance in high-temperature environments (generally resistant to temperatures up to 120 – 130°C); third, they have good flame retardancy, which meets the safety requirements of most electrical and lighting products.
Q: What is the typical light transmittance range of PC Light Diffuser Sheets?
A: The typical light transmittance range of PC Light Diffuser Sheets is 70% – 90%. The specific value will be affected by factors such as the thickness of the sheet, the type and content of light diffusing agents. Generally, products with higher light transmittance are more suitable for scenarios that require high brightness.
Q: Can PC Light Diffuser Sheets be processed into different shapes?
A: Yes, PC Light Diffuser Sheets have good processability and can be processed into various shapes through processes such as cutting, bending, thermoforming, and engraving. This flexibility allows them to adapt to the structural design needs of different lighting products (such as panel lights, downlights, and light boxes) and display devices.
Q: What is the service life of PC Light Diffuser Sheets?
A: Under normal use conditions (avoiding long-term exposure to strong ultraviolet rays and high-temperature environments beyond the material’s tolerance), the service life of PC Light Diffuser Sheets is usually 5 – 10 years. Some products with added anti-ultraviolet (UV) agents can have a longer service life, up to 10 – 15 years, and are more suitable for outdoor or semi-outdoor application scenarios.
Q: Are PC Light Diffuser Sheets environmentally friendly and recyclable?
A: Most PC Light Diffuser Sheets are environmentally friendly. They do not contain harmful substances such as heavy metals and halogens, and comply with international environmental standards (such as RoHS). At the same time, PC material itself is recyclable. After proper sorting and processing, waste PC Light Diffuser Sheets can be reused to produce new PC products, reducing environmental pollution.
Q: What are the common application fields of PC Light Diffuser Sheets?
A: PC Light Diffuser Sheets have a wide range of applications. The main fields include: 1. Lighting industry: used for the light guide and diffusion parts of panel lights, ceiling lights, downlights, and light boxes; 2. Display industry: used for the diffuser layers of LCD backlight modules, advertising displays, and electronic screen protectors; 3. Automotive industry: used for interior lighting panels and instrument panel diffusers of automobiles; 4. Architectural decoration: used for transparent partitions, ceiling decoration panels, and lighting ceilings.
Q: How to clean and maintain PC Light Diffuser Sheets?
A: When cleaning PC Light Diffuser Sheets, you should first use a soft cloth (such as a microfiber cloth) to wipe off the surface dust. Then, dip the cloth in a neutral cleaning solution (such as a mild soapy water) and gently wipe the surface. Do not use hard objects (such as steel wool) or corrosive cleaning agents (such as alcohol, acetone) to avoid scratching or damaging the sheet surface. During daily maintenance, avoid collisions and impacts, and prevent the sheet from being squeezed and deformed.
Q: What factors should be considered when selecting a PC Light Diffuser Sheet?
A: When selecting a PC Light Diffuser Sheet, the following factors should be considered: 1. Light transmittance and diffusion effect: select according to the brightness and uniformity requirements of the application scenario; 2. Thickness: different thicknesses affect the mechanical properties and light diffusion effect of the sheet, and select according to the product structure; 3. Special functions: such as whether anti-ultraviolet, flame retardant, or anti-static functions are required; 4. Size and processing performance: confirm whether the sheet size can meet the processing needs and whether it is easy to process into the required shape.
Q: Do PC Light Diffuser Sheets have fire - retardant properties? Can they be used in fire - protection - required scenarios?
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