Introduction
Lubricants (Lubricant Agents) are functional additives used in plastic and rubber formulations. Their primary function is to reduce friction during processing, improve melt fluidity, enhance mold release properties, and optimize surface appearance. Based on their mechanism of action and addition location, lubricants are classified into Internal Lubricants and External Lubricants.
Classification & Mechanisms of Lubricants
| Type | Target Location | Function Summary | Common Examples |
|---|---|---|---|
| Internal Lubricants | Inside polymer molecules | Reduces intermolecular cohesive force and improves melt fluidity | Calcium Stearate, Oleamide |
| External Lubricants | Interface between polymer and mold | Reduces adhesion, enhances mold release, and improves surface gloss | Paraffin Wax, PE Wax, EBS |
Note: Some lubricants feature both internal and external lubrication properties (e.g., ester lubricants like RG-70 and RG-19), which simultaneously improve processing stability and mold release performance.
Lubricant Forms & Selection Considerations
Powder Lubricants : Such as RG-70 and RG-60, ideal for injection molding or compounding processes, offering superior dispersibility.
Liquid Lubricants : Such as RG-19, ideal for extrusion processes, providing high stability and low volatility.
Selection Guidelines :
If high transparency is required: Choose non-blooming ester lubricants.
If processing time is short: Choose powder lubricants with low melting points and fast dispersion.
If mold plate-out/buildup occurs: Liquid lubricants provide superior self-cleaning effects.
Lubricants: Beyond Lubrication, Key to Efficiency & Quality
The choice of lubricant not only influences processing smoothness, but directly affects product appearance, structural stability, and overall production costs. For detailed product specifications, please refer to our Lubricant Product Pages.