Definition and Composition:

Polyethylene wax, also known as PE wax or polyethylene glycol (PEG), is a synthetic polymer derived from ethylene monomers. It has a low molecular weight and consists of long chains of ethylene units. PE wax is produced through the polymerization of ethylene gas under controlled conditions. The resulting material is a waxy, solid substance with a melting point typically ranging from 100°C to 140°C.

Properties and Applications:

Lubrication: PE wax exhibits excellent lubricating properties due to its low friction coefficient. It is commonly used as an internal or external lubricant in various industries, including plastics, rubber, and coatings. In plastic processing, it reduces friction between polymer chains, improving flow properties during extrusion or injection molding.

Processing Aid: PE wax acts as a processing aid in plastics manufacturing. It enhances the processability of polymers by reducing melt viscosity, preventing sticking to processing equipment, and improving surface finish. It is particularly useful in polyolefin-based materials.

Surface Modification: PE wax is employed as a surface modifier in printing inks, paints, and coatings. It enhances scratch resistance, gloss, and water repellency. In paper coatings, it provides a smooth finish and prevents ink absorption.

Hot Melt Adhesives: PE wax is a key component in hot melt adhesives. It improves adhesion, flexibility, and cohesion, allowing for better bonding performance.

Variants and Grades:

PE wax comes in various grades based on molecular weight, branching, and crystallinity. Low-density PE waxes are softer and more flexible, while high-density variants are harder and have better thermal stability. The choice of grade depends on the specific application requirements.