Optical grade PMMA light diffuser is high purity white powder for precision optical parts like LGP and backlight film, <1ppm impurity, ±1% haze tolerance, no crystal point uniform light output, COA provided, free test samples available.

Product Detail

Optical Grade PMMA Light Diffuser

Product Overview

This optical grade PMMA light diffuser is a cross-linked polymethyl methacrylate spherical micro-powder, specially developed for precision optical scenarios such as displays and backlight modules. Produced and packaged in a Class 10,000 clean workshop, it is different from ordinary injection-molded light diffusers, with core advantages of ultra-low impurity content and precision index tolerance, solving common defects of ordinary diffusers in optical products such as crystal points, uneven haze and bright spots.

*Important Note: This product is not recommended for ordinary PC/PS injection lampshades and low-requirement diffusion plates (unnecessary cost increase), and cannot be used for pure PMMA (acrylic) substrate as the refractive index matches PMMA and cannot produce effective light diffusion.

Core Advantages

Class 10,000 clean production
The whole process of production, testing and packaging is completed in a 10,000-class clean workshop, impurity content is controlled below 1ppm, no visible foreign matter, which will not cause crystal points, white spots, bright spots and other appearance defects on light guide plates and optical films.
Precision index tolerance control
D50 particle size tolerance is controlled within ±0.1μm with narrow particle size distribution, no coarse particles over 10μm, haze tolerance within ±1% between batches, ensuring consistent haze and brightness of large-volume films and plates, avoiding color difference and brightness difference between batches.
High transmittance with low light loss
Optimized refractive index of 1.49, light loss is 2% lower than ordinary PMMA diffuser and 4% lower than silicone diffuser at the same haze, bringing higher backlight brightness and better energy saving effect for display products.
Excellent dispersion performance
Special surface wetting treatment ensures good compatibility with MS adhesive, UV adhesive and PC light guide plate melt, easy to disperse without agglomeration and sedimentation, no need for long-time sand grinding to avoid damage to spherical structure.
Full-process quality inspection
Each batch is strictly tested for particle size, impurity content, whiteness, refractive index and haze, with COA inspection report provided, and third-party testing is supported to meet the supply chain access requirements of the display industry.

Typical Performance

The product appears as pure white spherical powder without visible impurities, conventional particle size covers 1.5μm/2μm/3μm/5μm and can be customized, refractive index 1.49±0.01, whiteness over 98, volatile matter below 0.2%, zero coarse particles over 10μm. It passes RoHS, REACH and halogen-free tests, meeting the environmental protection requirements of export display products.

Recommended Applications

It is specially used for high-end precision optical scenarios, including LED display/TV light guide plates, backlight module diffusion films, display anti-glare (AG) films, automotive display light diffusion parts, high-end optical lens uniform light parts. It is not recommended for ordinary injection lampshades, ordinary diffusion plates and other scenarios with low impurity requirements due to high cost.

Usage Guidelines

For light guide plate modification, select 2-3μm particle size, recommended addition rate is 0.2%-0.8%. It is recommended to add in the form of 10% concentration masterbatch to ensure uniform dispersion without crystal points. The processing temperature is set according to the conventional PC light guide plate temperature of 280-300℃, and the barrel should be fully cleaned before production to avoid impurity mixing.

For optical coating/diffusion film, select 1.5-2μm small particle size, recommended addition rate is 3%-8%. After adding into the glue, disperse at high speed, no sand grinding is required to avoid damaging the microsphere structure. After dispersion, filter with 1μm filter element before coating to ensure no crystal points.

We provide free samples, can recommend suitable particle size according to customers' haze and transmittance requirements, and provide formula technical support.

Packaging & Support

The product is packed in anti-static vacuum aluminum foil bags with anti-static cartons outside, 1kg/bag, 10kg/carton, packaged in a 1,000-class clean workshop to avoid impurity introduction during transportation and storage. Store in a constant temperature and humidity clean environment, sealed storage shelf life is 2 years.

Conventional particle size models are in stock all year round, bulk order delivery time is 3-5 working days. We support customized optical grade products with special particle size and surface treatment, and provide full-process technical support.

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