Functions and Selection of PVC Internal Lubricant

In the production of PVC products, the choice and proportioning of lubricants are crucial, especially the proper application of PVC internal lubricant and external lubricants. As a professional PVC lubricant supplier, Hairuite understands the key role that lubricants play in improving product quality and production efficiency. The right lubricant can effectively improve the mechanical properties, surface gloss, and processing efficiency of products, while an incorrect choice can lead to product defects.

The Role of PVC Internal Lubricant

The role of PVC internal lubricant is mainly reflected in the following aspects:

• Stabilizing the Plasticization Process: PVC internal lubricant effectively prevents a sharp increase in torque during the plasticization process, ensuring stable plasticization of the resin.

  
  

• Reducing Melt Viscosity: The internal lubricant reduces the melt viscosity of the resin, increasing its fluidity, thereby improving production efficiency.

  
  

• Improving Processing Capability: It also reduces the load on equipment, improves energy efficiency, and helps enhance processing capabilities.

  
  

The Role of External Lubricants

The role of external lubricants is reflected in the following aspects:

• Preventing Resin Decomposition and Discoloration: External lubricants reduce frictional heat between the resin and molding metal surfaces, preventing resin decomposition and discoloration during processing.

  
  

• Preventing Sintering Phenomenon: During processing, external lubricants can prevent the resin from sintering on the mechanical surface.

  
  

• Improving Mold Release Performance: External lubricants effectively improve mold release, reducing adhesion during the molding process.

  
  

• Enhancing Surface Smoothness: By improving the surface smoothness of the finished product, external lubricants enhance the appearance of the final PVC product.

  
  

Selection of Lubricants

The choice of lubricant directly impacts the quality of PVC products. As a PVC lubricant supplier, Hairuite suggests considering the following factors:

• Molecular Structure: Understanding the molecular structure of the lubricant, especially the functional groups and branching chains, helps to make a preliminary assessment of the lubricant's performance.

  
  

• Polarity: Since PVC is a polar material, selecting a lubricant with similar polarity ensures better compatibility. Typically, PVC internal lubricant and external lubricants have different polarities.

  
  

• Heat Resistance: The heat resistance of a lubricant determines its performance in high-temperature environments. A lubricant with poor heat resistance will lead to inadequate lubrication in the later stages of processing, affecting product quality.

  
  

• Volatility Resistance: A lubricant with good volatility resistance does not evaporate excessively during processing, maintaining its lubricating effect and reducing negative impacts during production.

  
  

• Melting Point: The melting point of the lubricant affects its lubricating performance at different processing temperatures. Heat resistance and volatility resistance are more important than melting point.

  
  

How to Choose the Right Lubricant?

Selecting the appropriate PVC internal lubricant and external lubricants based on specific processing requirements is very important. For example, an ester-based lubricant with good heat resistance, low melting point, and high heat resistance can play a stable role in PVC processing. Therefore, using high-quality lubricants can effectively improve production efficiency, reduce defects, and enhance the appearance quality of the products.

As a leading PVC lubricant supplier, Hairuite provides customers with a range of high-performance PVC internal lubricant and external lubricants to help optimize formulations and enhance production efficiency. Our series of lubricant products, known for their excellent heat resistance, volatility resistance, and good processing adaptability, are widely used in various stages of PVC product production.