Overview
Polyethylene micronized wax is a synthetic wax produced by the polymerization of ethylene and subsequent micronization into fine particles. It is valued for its ability to modify surface properties in industrial formulations. Unlike traditional waxes, its micronized form ensures uniform dispersion, making it ideal for applications requiring precise control over gloss, slip, and scratch resistance. The material is chemically inert and compatible with most polymers, resins, and solvents. Its low molecular weight variants are particularly effective in reducing friction in plastic processing, while higher molecular weight grades excel in coatings for matting effects.
Physical and Chemical Properties
Polyethylene micronized wax exhibits a narrow particle size distribution, typically between 5–20 μm, which enhances its dispersibility in liquid and solid matrices. Its melting point ranges from 100–120°C, depending on the degree of polymerization. The wax is hydrophobic, with a density close to that of polyethylene (0.91–0.96 g/cm³). Key chemical properties include resistance to acids, alkalis, and most organic solvents. It does not oxidize readily under normal conditions but may degrade at temperatures above 200°C. The powder’s low viscosity in molten state makes it a preferred additive for improving flow in extrusion and injection molding.
Main Applications
In the coatings industry, polyethylene micronized wax serves as a matting agent and surface conditioner, reducing gloss while enhancing scratch resistance. It is widely used in automotive, wood, and industrial coatings. For inks, it improves rub resistance and prevents blocking in printed materials. Plastics manufacturers incorporate it as a lubricant to ease mold release and reduce die buildup. In masterbatches, it aids pigment dispersion. The rubber industry utilizes it to enhance processing and surface finish. Emerging applications include 3D printing filaments, where it acts as a flow promoter.
Safety and Storage
Polyethylene micronized wax is classified as non-hazardous under normal handling conditions. However, dust generation during processing requires adequate ventilation or respiratory protection to prevent inhalation. Prolonged skin contact may cause mild irritation; nitrile gloves are recommended. Storage should prioritize dryness and temperature stability (below 30°C). Bulk bags or lined containers prevent moisture absorption. The material is stable for at least two years when stored properly. In case of fire, use CO2 or dry chemical extinguishers—water spray may spread molten wax.
B2B Procurement Guide
When sourcing polyethylene micronized wax, buyers should specify technical parameters such as particle size distribution, melt viscosity (commonly 100–500 mPa·s at 140°C), and acid value (<1 mg KOH/g). Reputable suppliers provide technical datasheets with DSC curves for melting behavior. Procurement strategies should consider bulk discounts for orders exceeding 1 metric ton. Just-in-time delivery is advisable for humid climates to prevent caking. Quality certifications (e.g., ISO 9001) and batch-to-batch consistency are critical for coating applications. Sample testing with end-use formulations is strongly recommended before large-volume purchases.
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