Plastics & Masterbatch
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Oxidized polyethylene wax is a polar wax with carboxyl groups added to its chain. It is the type with the best pigment wetting and dispersion performance, and the standard for PVC and masterbatch applications.
Oxidized polyethylene wax (OPE wax) is produced by the controlled oxidation of non-oxidized wax. This process adds carboxyl (–COOH) groups to the molecular chain and makes the wax polar. Polarity lets the wax interact much better with polar surfaces such as pigments, fillers and metals.
A pigment agglomerate must first be wetted before it can be dispersed. A non-polar wax cannot wet a polar pigment surface well; an oxidized wax, by contrast, anchors to the surface through its carboxyl groups and penetrates the agglomerate. That is why oxidized types are the standard in masterbatch formulations with high pigment loadings.
PVC processing needs two kinds of lubricant: an internal lubricant that reduces friction within the melt, and an external lubricant that prevents sticking to the die surface. Thanks to its polarity, oxidized PE wax partly performs both functions and simplifies the formulation.
| # | Property | Value | Unit |
|---|---|---|---|
| 01 | Drop point ASTM D3954 | 100 – 125 | °C |
| 02 | Viscosity (140 °C) ASTM D3236 | 150 – 800 | mPa·s |
| 03 | Acid value ASTM D1386 | 14 – 30 | mg KOH/g |
| 04 | Penetration (25 °C) ASTM D1321 | 1 – 6 | 0.1 mm |
| 05 | Density (23 °C) ASTM D1505 | 0.95 – 0.99 | g/cm³ |
| 06 | Color ASTM D1500 | White – light yellow |
The values in the table are typical production ranges widely used in the industry, not a supplier-specific specification. Request the technical data sheet (TDS) and certificate of analysis (CoA) for exact batch values.
| Packaging Type | Net Weight | Per Pallet | Container / Truck |
|---|---|---|---|
| Kraft paper bag (PE-lined) | 25 kg | 1,375 kg | 20' FCL approx. 20 tonnes |
| Jumbo bag (FIBC) | 500 – 1,000 kg | — | 20' FCL approx. 20 tonnes |
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The typical dosage is 2–5% and increases with pigment loading. The exact level is set by trials according to the carrier resin and extruder type. Too much wax weakens tensile strength and adhesion properties in the end product.
Acid value (ASTM D1386) indicates the polarity of the wax. A higher acid value wets pigment and filler surfaces better and makes dispersion easier. But higher is not always better: very high values can cause stability problems and a risk of metal corrosion in some systems.
Oxidized PE wax is supplied in 25 kg PE-lined kraft paper bags (1,375 kg per pallet) or in 500–1,000 kg jumbo bags (FIBC). A 20' container takes approximately 20 tonnes.
Yes. The values on this page are typical production ranges common in the industry; exact values for a batch are given in the technical data sheet (TDS) and certificate of analysis (CoA). You can request them through the quote form by choosing the "Catalog / TDS / SDS" option.