Product Overview
PVC External Lubricant G70 is a high-performance lubricant specifically developed to improve processing efficiency in polyvinyl chloride (PVC) manufacturing.
Formulated using pentaerythritol hexanedioate, stearate, and high-molecular-weight multifunctional fatty acid esters, G70 provides outstanding external lubrication performance during PVC processing.
The product typically appears as white or light yellow flakes or free-flowing powder, with excellent chemical stability and minimal odor. It is insoluble in water but soluble in organic solvents such as tri-n-butyl phosphate (TBP) and chloroform.
During processing, G70 forms a lubricating layer between the PVC melt and metal surfaces of processing equipment, significantly reducing friction and preventing material adhesion. This leads to:
- Improved demolding performance
- Enhanced melt flowability
- Reduced processing torque
- Higher surface gloss and smoother finishes
PVC External Lubricant G70 is particularly suitable for transparent PVC applications where maintaining optical clarity and surface aesthetics is critical. It also demonstrates excellent compatibility with metal salt stabilizers, making it easy to incorporate into existing PVC formulations.
Its low volatility and high flash point ensure stable processing conditions while helping extend the operational life of manufacturing equipment.
Key Specifications
Typical product characteristics include:
- Chemical Composition: Pentaerythritol hexanedioate, stearate, or multifunctional fatty acid composite esters
- Appearance: White or light yellow flakes or free-flowing powder
- Odor: Odorless
- Melting Point: 48 – 56°C
- Acid Value: ≤ 10 mg KOH/g
- Iodine Value: ≤ 2.0 g I₂/100 g
- Flash Point: ≥ 230°C
- Volatility (105°C, 2 hours): ≤ 2%
Reference Identifiers (varies by grade):
- CAS Number: 1592-23-0
- EINECS Number: 235-390-9
Applications
PVC External Lubricant G70 is widely used across multiple PVC processing applications where smooth processing and high surface quality are required.
Rigid PVC Film Production
Used in the manufacturing of transparent rigid PVC films, G70 improves demolding performance, reduces adhesion to processing equipment, and ensures excellent film clarity and smooth surfaces.
PVC Granule Manufacturing
Suitable for both soft and rigid PVC granule production, it helps reduce balancing torque, improves flow behavior, and enhances the surface gloss of finished granules.
Calendered PVC Films
In calendering processes, G70 reduces friction between the PVC melt and rollers, improving melt flow and ensuring uniform film thickness and high transparency.
PVC Sheets and Profiles
Commonly used in the production of:
- Transparent PVC sheets
- Window and door profiles
- Rigid structural PVC components
It improves surface appearance, facilitates demolding, and maintains optical clarity.
PVC Foam Boards
In foam board formulations, G70 enhances plasticization behavior, surface finish, and impact strength, contributing to improved overall product quality.
PVC Pipes
G70 promotes smooth extrusion during pipe manufacturing, improving surface finish and increasing processing efficiency in continuous extrusion operations.
Recommended Dosage
Typical recommended dosage levels:
- Transparent PVC products: 0.3 – 0.7%
- Opaque PVC products: 0.3 – 0.8%
In certain formulations or specialized processing conditions, the dosage may be adjusted according to resin type, equipment configuration, and required lubrication balance.
Packaging and Storage
Packaging
PVC External Lubricant G70 is typically supplied in:
- 25 kg bags
Standard packaging includes paper-plastic composite bags, with customized packaging options available upon customer request.
Storage Conditions
To maintain product quality, the following storage conditions are recommended:
- Store in a cool, dry, and well-ventilated warehouse
- Avoid direct sunlight exposure
- Keep away from heat sources, strong oxidizing agents, and acidic environments
Recommended storage environment:
- Temperature: below 40°C
- Relative Humidity: ≤ 60%
Shelf Life
- 24 months when stored in original, unopened packaging
- After opening, the package should be properly resealed and used within 6 months to prevent moisture absorption or caking.
