As an efficient external lubricant, polyethylene wax (PE wax) plays a critical role in PVC processing through the following mechanisms:

1. Core Lubrication Mechanism

• Interfacial Separation Effect

  • Forms a stable lubricating layer between the melt and metal equipment

  • Effectively reduces the friction coefficient (by 40%-60%)

  • Prevents melt adhesion to the screw and mold surfaces

• Dynamic Lubrication Characteristics

  • Gradually releases lubricating effects as processing temperature increases

  • Maintains consistent and stable lubrication throughout the process

2. Practical Application Benefits

• Improved Production Efficiency

  • Allows for increased extrusion speed (15%-25%)

  • Reduces downtime for cleaning (extends continuous production time by over 50%)

• Enhanced Product Quality

  • Eliminates surface defects such as fish eyes and flow marks

  • Improves surface gloss and smoothness of products

• Equipment Protection

  • Reduces wear on screws and barrels

  • Extends mold service life by 30%-50%

3. Usage Guidelines

• Recommended dosage: 0.1-0.5 phr (excessive amounts may cause over-lubrication)

• Best results achieved when combined with internal lubricants

• Optimal molecular weight range: 2,000-5,000

With its unique external lubrication properties, polyethylene wax significantly enhances PVC processing efficiency and product quality, making it an indispensable additive in modern PVC production.

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