Internal Lubricant G60 is a PVC processing additive designed to reduce friction within the PVC compound and support more stable fusion during processing. In practical terms, it helps PVC resin and other formulation components move and blend more consistently under heat and shear, while reducing excessive adhesion between the compound and processing equipment. Because “G60” can be a supplier-specific grade name, I recommend confirming its exact chemistry, dosage range, and performance data in the relevant technical data sheet before production use.
At Shitong, we view Internal Lubricant G60 as one part of a complete PVC formulation rather than a universal replacement for external lubricants, stabilizers, processing aids, or impact modifiers. Its actual effect depends on the PVC resin, filler level, stabilizer system, processing temperature, equipment, and final product requirements. The most reliable selection method is to compare a controlled trial against the current formulation using torque, fusion behavior, surface appearance, output stability, and mechanical performance.
During PVC processing, resin particles must absorb heat and undergo controlled fusion before the melt can be shaped into profiles, pipes, sheets, films, or molded products. An internal lubricant primarily influences friction inside the PVC compound and can affect the balance between flow, fusion, and melt homogeneity. If the formulation has insufficient internal lubrication, the compound may show excessive resistance during processing or develop inconsistent fusion behavior.
When the formulation contains too much lubrication, fusion may be delayed and the finished product may show reduced weld strength, surface defects, or inconsistent mechanical properties. For this reason, internal lubricant selection is a balancing exercise rather than a simple “more is better” decision. I recommend treating G60 as a formulation tool that must be matched to the complete recipe and the production conditions.
Internal and external lubricants perform related but different functions. Internal lubricants mainly support flow and reduce internal friction within the PVC melt, while external lubricants mainly reduce adhesion between the compound and metal surfaces such as screws, barrels, dies, and calender rolls. In many PVC formulations, both types are used together to achieve an appropriate processing balance.
This distinction is important when troubleshooting. If a profile sticks to the die, the issue may be related to external lubrication, die temperature, or equipment condition rather than a shortage of internal lubricant. If the compound shows poor fusion or unstable torque, the internal lubrication balance may deserve closer review, but the stabilizer, resin, filler, and temperature profile should also be checked.
These functions should be understood as formulation objectives, not guaranteed results for every PVC application. The effect of G60 must be verified through testing because the same additive can behave differently in rigid PVC, flexible PVC, filled compounds, and formulations with different stabilizer systems.
Internal Lubricant G60 may be considered for PVC processing applications where controlled fusion and melt flow are important. Potential application areas include rigid PVC profiles, pipes, fittings, sheets, window and door systems, cable compounds, and selected injection-molded components. Suitability depends on whether the grade is designed for the target PVC system and whether its performance remains acceptable under the required processing conditions.
For rigid PVC profiles and pipes, buyers usually focus on fusion behavior, output stability, surface quality, and dimensional consistency. For filled PVC, the lubricant must be evaluated together with calcium carbonate or other mineral fillers because filler loading can change melt friction and processing torque. For flexible PVC, compatibility with plasticizers and the effect on migration, surface feel, and final flexibility require additional attention.
Many conventional PVC formulations are processed within a broad temperature region of approximately 160–210 °C, although the correct settings depend on the formulation and equipment. This range is provided only as general processing context, not as a specification for G60. A trial should record actual barrel, die, or roll temperatures rather than relying only on the machine display or a standard recipe.
For a practical evaluation, I suggest comparing at least three controlled conditions, such as a low, nominal, and high processing-temperature setting. Record torque, pressure, output, surface appearance, fusion behavior, and any plate-out or sticking. This approach helps distinguish the effect of G60 from normal process variation.
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Before purchasing Internal Lubricant G60, I recommend asking the supplier for a current technical data sheet and safety data sheet. The technical data should identify the product form, appearance, recommended application, typical dosage guidance, storage requirements, packaging, and relevant quality-control items. If the supplier does not publish a universal dosage, that is not necessarily a problem, but the buyer should receive clear trial guidance based on the target application.
| Information to Confirm | Why It Matters |
|---|---|
| Product identity and chemical description | Confirms whether the grade matches the intended PVC formulation. |
| Recommended dosage or trial range | Helps prevent under-lubrication, delayed fusion, or excessive lubrication. |
| Appearance and physical form | Supports handling, weighing, blending, and batch consistency. |
| Storage and shelf-life guidance | Reduces the risk of moisture uptake, contamination, or material deterioration. |
| Batch consistency and quality records | Supports stable production and more reliable incoming inspection. |
| Packaging and export documentation | Helps purchasing, logistics, customs, and warehouse teams plan correctly. |
Dosage should always be expressed clearly, such as parts per hundred resin, commonly written as phr, or as a percentage of the formulation. As a simple conversion, a 1% addition equals 1 kg of additive for every 100 kg of the reference material. This conversion is only a calculation example; it is not a recommended G60 dosage.
First, identify the product type, resin grade, filler level, stabilizer system, equipment, and target output. A lubricant suitable for a rigid profile may not provide the same balance in a pipe, sheet, cable compound, or flexible PVC product. The supplier should understand the application before recommending a trial plan.
Run the existing formulation under stable conditions and record the key process indicators. Useful observations include fusion time, torque trend, melt pressure, die behavior, surface appearance, output rate, and product dimensions. Without a baseline, it is difficult to determine whether a new lubricant has improved the process.
Use a small, controlled dosage matrix rather than changing the formulation randomly. For example, a buyer may compare the current formulation with two or three carefully defined trial levels, provided those levels are agreed with the supplier and appropriate for the specific product. Each trial should use the same resin, filler, stabilizer, machine, and temperature profile wherever possible.
Processing behavior alone does not determine success. Check appearance, dimensions, fusion quality, impact or mechanical performance where relevant, weld behavior, odor, surface deposits, and storage stability. A formulation that runs smoothly but fails the finished-product requirements is not a successful formulation.
As a PVC lubricant manufacturer, supplier, and exporter, Shitong supports buyers through product selection, application communication, sample coordination, technical document preparation, and commercial supply planning. We can review the target PVC application, current formulation objectives, processing equipment, expected volume, and required delivery market before discussing a suitable supply approach. Our role is to help buyers evaluate fit systematically rather than promise a universal result.
For larger projects, I recommend sharing the current formulation framework, target product, processing temperature, equipment type, monthly demand, packaging preference, and quality requirements. This information helps us provide more relevant technical and commercial feedback. Final approval should be based on the buyer’s own production trial and internal quality criteria.
Internal Lubricant G60 can be a useful PVC processing additive when the formulation needs better control of internal friction, fusion, and melt behavior. However, no responsible supplier should define its suitability from the grade name alone. The next step is to confirm the exact product specification, share your application and processing conditions, and conduct a controlled trial against your existing formulation.
Shitong can support this evaluation with product information, sample discussion, technical communication, and supply planning for qualified PVC lubricant requirements. Contact our team with your PVC product type, resin and filler system, equipment, target dosage, and expected purchase volume so we can discuss the most practical route for your project.
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