Acrylic Diffuser-PMMA

Acrylic Diffuser-PMMA

Led Diffuser Sheets
Product Description

In general, a light diffuser is any material placed in the path of a light source that causes light to spread. LED luminaire manufacturers often rely on light diffusers to soften shadows and eliminate glare. While the advent of LEDs has brought about excellent energy efficiency and superior light controls, the point sources present in the LED chip boards pose a challenge for general illuminations in the form of glare. So, the LED light fixtures use specially designed covers that are optimized to offer light diffusion properties. Additionally, these covers serve the purpose of shielding the light source as well. While most LED light diffusers serve the same purpose, they differ in the key materials that they are made of. And, this is where their quality comes into the picture.

Product Properties

Advantage Disadvantage

Advantage Disadvantage
It has a high heat tolerance and strong resistance to UV light, making them yellow-proof. Its impact resistance is worse than PC but much higher than PS diffusers.
With a light transmittance rate of 92%, it allows for more light to pass through while requiring less power,
resulting in higher lumens per watt for the fixtures that use it.
PMMA is a slightly costly material in comparison to PS, which drives up the cost of the fixture.
Given that lights with PMMA diffusers use less power to achieve higher efficacy, the LED chips don't get overworked.  

In conclusion, PMMA / Acrylic diffusers offer great performance. Using PMMA as the material for the light guide plate in a flat panel ceiling light means a premium luminaire that is designed to be trouble-free. Its high cost is evened-up by its durability and efficacy.

Acrylic Diffuser Sheet Specifications

Item Description
Product Name Acrylic Diffuser Sheet
Raw material Acrylic/PMMA
Color Opal/white, custom color
Length Standard length or customized length
Width Standard width or customized width
Working temperature from -20°C to +70°C (max. continuous working temperature)
from -20°C to +90°C (max. intermittend working temperature)
Protective film Material supplied with protective film on both sides
UV protective layer Optional
Fire rating V0 according to UL94
Product Origin TURKEY

Optical Property

Property Value Unit Test Method
Light Transmission(clear) up to 92 % ASTM D1003
Haze(clear) <1 % ASTM D1003

Technical Parameters

Item Value Unit Test Method
Density 1,19 gr/cm3 ISO 1183
Water Absorbing Capacity 0,3 % ISO 62
Moulding Shrinkage 0,2-0,6 % ASTM D955
Elongation at Break 7 % ISO 527-2
Tensile Modulus 3200 MPa ISO 527-2
Flexural Strength 120 MPa ISO 178
Flexural Modulus 3300 MPa ISO 178
Dielectric Constant 3,1 - DIN53483
Dielectric Strength 20 kV/mm DIN53481
Coefficient of Thermal Expansion 0.07 mm/m°C ISO 11359-2
Vicat Temperature 105 °C ISO 306
Temperature of deflection under load 100 °C ISO 75

Model And Standard Size

Model Thickness/ mm/inch Thickness tolerance / mm Width / mm Length / mm
PMMA-1.5 1.5mm 0.06" 0,15 2050mm 3050mm
PMMA-2 2mm 0.078" 0,2 2050mm 3050mm
PMMA-3 3mm 0.118" 0,3 2050mm 3050mm
PMMA-4 4mm 0.157" 0,2 2050mm 3050mm
PMMA-5 5mm 0.197" 0,25 2050mm 3050mm
PMMA-6 6mm 0.236" 0,3 2050mm 3050mm
PMMA-7 7mm 0.275" 0,35 2050mm 3050mm