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A-685
A-685 light diffusion additive for PC / PMMA / PS / PP
A-685 is documented as powder for PC / PMMA / PS / PP. The source TDS lists 0.3-0.5% and positions the grade for LED hiding, light diffusion and transmittance/haze balancing.
20 kg carton
TDS-derived technical profile
Key values listed for A-685
The following technical values are taken from the current TDS to support grade selection and initial formulation work.
| Property | Listed value | Condition |
|---|---|---|
| Listed dosage | 0.3-0.5% | — |
| Heat resistance | 470°C | Source TDS statement |
| Example haze | About 89.2% | 1.2 cm plate example in source TDS |
| Example transmittance | Up to 93% | Extrusion example in source TDS |
What this grade is positioned to support
- Point-light hiding
- Light diffusion
- Transmittance and haze balance
How to prepare the first evaluation
- 01
Pre-wet the resin with white mineral oil or diffusion oil for powder dispersion.
- 02
Add A-685, mix uniformly and process the optical test piece.
- 03
Measure haze, transmission and point-light hiding on the actual thickness.
Technical documentation
Request current TDS Current TDS and application guidance
Source file: a-685-tds.pdf. Optical results depend on resin, thickness, lamp spacing and dosage. Treat source optical examples as formulation references and validate the finished lamp or panel.