SIENOX LED Raw‑Material Solutions

Working Condition Requirements

• Material Type: LED packaging materials (LED packaging silicone, phosphor slurry, LED epoxy resin, LED potting glue, etc.)

• Initial Status: LED encapsulation glue and phosphor slurry contain a large number of micro‑scale bubbles. Phosphor particles are prone to sedimentation and agglomeration. Direct encapsulation easily causes bubble voids and uneven phosphor distribution, which seriously affects LED light‑output uniformity, color‑temperature consistency and packaging reliability.

• Treatment Target: Uniformly remove micro‑scale bubbles from LED packaging materials, disperse phosphor particles evenly in the encapsulation glue matrix, ensure uniform LED light output, consistent color temperature and bubble‑free defects, and meet high‑reliability packaging process requirements.

Comparison Before and After Improvement

Before Improvement — Pain Points of Traditional Processes

The quality of LED packaging materials (packaging silicone, phosphor slurry, etc.) directly determines the luminous efficiency, color‑temperature consistency and service life of LED lamps. However, phosphor powder with high density tends to settle and encapsulation glue features high viscosity, bringing multiple challenges to conventional processing:

• Encapsulation defects caused by bubbles: Residual bubbles in encapsulation glue form voids after curing, resulting in uneven LED light output and local dark areas. In severe cases, bubble rupture cracks the encapsulation layer, and moisture intrusion accelerates light attenuation.

• Uneven phosphor distribution: Phosphor particles have higher density than silicone matrix. Conventional stirring easily leads to phosphor sedimentation or agglomeration, triggering color‑temperature deviation (high SDCM value) in different areas of LED chips and reducing product yield.

• Particle damage from high‑speed dispersion: Excessive shear force of traditional high‑speed dispersers may damage the surface coating of phosphor particles, alter luminescence properties and affect LED luminous efficiency and color coordinates.

• Difficult batch consistency guarantee: Large fluctuation of phosphor dispersion uniformity among batches by traditional methods leads to discrete LED color‑temperature distribution, failing to meet strict color‑difference control requirements of high‑end lighting and display screens.

Solutions

• Vacuum Defoaming + Planetary Motion: Under vacuum conditions, powerful shear and convection generated by rotation‑revolution planetary motion make micro‑scale bubbles in encapsulation glue rise gradually and be extracted for thorough defoaming.

• Uniform Phosphor Dispersion: Planetary motion delivers 360° dead‑zone‑free mixing. Phosphor particles are redispersed under mild and uniform force field without damaging particle surface coating.

• High Batch Consistency: Parameterized control over rotating speed, time and vacuum degree guarantees consistent processing results and concentrated LED color‑temperature distribution for each batch.

• Suitable for High‑reliability Packaging: Processed packaging materials apply to processes such as LED chip encapsulation, lamp potting and display‑screen module manufacturing, with remarkable improvement in luminous efficiency and reliability.

Advantages of Mixing‑Defoaming Machine

• Efficient Removal of Micro‑Scale Bubbles: Vacuum environment combined with planetary motion effectively eliminates micro‑sized bubbles in encapsulation glue and eliminates hidden risks of voids and dark areas after curing.

• Uniform Phosphor Dispersion: Gentle and uniform rotation‑revolution planetary motion realizes non‑destructive dispersion of phosphor particles while maintaining original luminescence properties.

• Precisely Controllable Parameters: Adjustable rotating speed, time and vacuum degree for accurate process‑parameter optimization for different encapsulation‑glue formulas and phosphor concentrations.

• Excellent Batch Consistency: Standardized workflow ensures even phosphor distribution across batches with concentrated LED color‑temperature distribution.

• High Efficiency & Time‑Saving: The whole mixing‑defoaming process completes within several minutes, greatly improving production efficiency.

• Compatible with High‑reliability Packaging: Treated packaging materials meet high‑precision process requirements for LED chip encapsulation, lamp potting and display‑screen modules.

Test Conditions

Comparison Before and After Mixing

Mature Application Fields

✅ LED Chip Encapsulation

✅ LED Lamp Potting

✅ LED Display Screen Module

✅ Mini LED / Micro LED

✅ Plant Lighting

✅ Automotive LED Lighting

***SIENOX has more than 1800 material mixing‑defoaming cases, free sample testing and trial machine test available