We all know Optical Brightener is from China,in our life,we can see this name from the detergent products,but only very
professional people know it also can be used in plastics,textile,paper,coating,ink etc.
Optical Brightener has many differnet grade,not only from the usage but also from the price.Raytop Chemical is the best supplier
of optical brighteners,espcially the optical brightener OB-1,which is the 75% of our production capacity.
Optical Brightener OB-1 can be used in many different industries,but in PVC products,it likes a star.Why so many people use optical brightener OB-1 in the PVC products?That is OB-1 price is reasonable and dosage is ok compare with optical brightener FP-127 and optical brightener OB.
Besides the above reasons,Optical Brightener OB-1 with the highest melting point,so it is suotable most of the plastics products.
Product Name:PVC Optical Brightener OB-1 from China factory
Chemical Name:2.2’-(4.4’-diphenol vinyl) dibenzoxazol
CAS No.:1533-45-5
C.I. No.:393
Molecular Formula:C28H18N2O2
Molecular Weight:414
Technical Index:Appearance:Yellow green powder
Melting Point:356~360°C
Purity:98.5% min
Recommend Dosage:200-500g per 1000kg material
Package:10KG/25kg per fiber drum with 450kg or 500 kg or 675kg/pallet
Standard PVC Profile Formulation (Per 100 kg Batch)
| Raw Material | Proportion (kg) | Function |
|---|---|---|
| PVC Resin (SG-5) | 85.00 | Main material, provides strength and weather resistance |
| Calcium-Zinc Stabilizer | 3.00 | Enhances heat stability and prevents PVC degradation |
| Processing Aid (ACR) | 2.50 | Improves melt flow and enhances surface smoothness |
| Lubricant (PE Wax/Stearic Acid) | 0.80 | Internal & external lubrication for better processing |
| Calcium Carbonate (CaCO₃) | 7.00 | Improves rigidity and reduces costs |
| Titanium Dioxide (TiO₂) | 1.50 | Provides basic whitening, opacity, and UV resistance |
| Optical Brightener OB-1 | 0.03 | Enhances whiteness and neutralizes yellowish tones |
| Ultramarine Blue | 0.10 | Adjusts whiteness, giving a cooler and brighter tone |
| Ultramarine Violet | 0.05 | Fine-tunes color to prevent yellowing |
How to Optimize the Formula for Whiter PVC Profiles?
1.Increase Titanium Dioxide (TiO₂) to 2.0-2.5%: Enhances opacity and brightness, but excessive amounts may affect toughness.
2.Adjust Optical Brightener OB-1, Ultramarine Blue, and Ultramarine Violet:
If the PVC profile looks yellowish, increase OB-1 to 0.05%, but avoid excess to prevent a greenish hue.
Increase Ultramarine Blue to 0.15% for a cooler tone and improved whiteness.
3.Use Ultra-Fine Calcium Carbonate (CaCO₃): Smaller particle size fillers enhance gloss and whiteness.
4.Optimize Processing Temperature and Mixing Time: Prevents high-temperature degradation, maintaining the best color quality.
Why Use Optical Brightener OB-1 for PVC Profiles?
Optical Brightener OB-1 for PVC extrusion is widely used in plastic profiles, PVC window frames, door panels, and decorative boards to achieve high whiteness, brightness, and anti-yellowing effects. The combination of TiO₂, OB-1, and ultramarine pigments creates a superior whitening effect for PVC profile manufacturers.
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