Problem overview
A one-pack stabilizer combines heat stabilizer and lubricants (and sometimes other additives) in a single product, so the processor adds one material instead of several. This simplifies weighing and gives more consistent batches.
Because the lubricant system is built in, the right one-pack depends not only on heat stability but also on the machine, output, filler level and the product being made.
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Use PVC Problem SolverCommon symptoms
- You are setting up a new pipe, conduit or fitting line
- You are switching from lead to calcium-zinc (lead-free)
- Your current stabilizer gives colour or fusion problems
- You want to simplify weighing and reduce batch variation
Possible causes
| What you see | Possible causes |
|---|---|
| Application (pipe, conduit, fittings, profile) | Determines the heat stability, lubrication and surface finish the one-pack must provide |
| Standard (e.g. BIS 4985, 12818, 13592, ASTM D 1785) | Determines lead / lead-free requirement and quality level |
| Machine (single, twin, conical, parallel) | Changes shear and heat history and therefore lubrication need |
| Filler level and output | Higher filler and output need a more robust stabilizer / lubricant system |
What to check
- Product being made and the standard / class required
- Whether lead-free is required by your customer or market
- Extruder type, screw design and output
- Calcium carbonate level and other additives used
- Colour and surface finish requirement
Processing and formulation factors
Lead vs lead-free
Lead-based one-packs are robust and economical where allowed. Calcium-zinc systems are used where lead-free is required and need closer matching of lubrication and fusion.
Built-in lubrication
Because lubricants are pre-blended, adding extra wax or stearic acid on top should be done only after checking fusion.
Trial approach
Selection should be confirmed with a line trial — compare colour, fusion, ampere and test results with the current product.
Practical troubleshooting checklist
- Define application, standard and colour requirement
- Note machine type, output and filler level
- Shortlist grades using the Grade Finder
- Request TDS and a trial sample
- Run a controlled trial and compare test results
Need help selecting a PVC additive?
Answer a few questions about your product, machine and requirements to see suitable grades.
Use Grade FinderWhen to contact a technical team
- You are converting a line to lead-free
- You need one grade for several products
- You want a cost-optimised formulation without losing quality
This guide gives general starting points. Results depend on your formulation, raw materials and machine; changes should be confirmed with controlled trials.
Frequently asked questions
How do I select a PVC one-pack stabilizer?
Start from your application and standard, then consider lead vs lead-free, machine type, output and filler level. Confirm with a line trial.
What is the difference between one-pack and separate stabilizer?
A one-pack already contains stabilizer and lubricants in one product; separate systems are dosed individually.
Can I add extra wax with a one-pack stabilizer?
Sometimes, but because lubricants are already included, extra lubricant can disturb fusion. Check with your supplier first.
Related Friends Chemical products
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Cost-effective, high-efficiency thermal stabilization for rigid PVC applications.
View productsNeed a sample or quotation?
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