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PVC Formulation Guide
Explore formulation development for PVC pipes, UPVC profiles, electrical conduits, foam boards, ceiling panels, and other rigid PVC products.
Choose an application, review the raw-material functions, compare development objectives, and calculate ingredient batch weights in phr.
Select a productChoose Your PVC Product
Select a product from the menu or click an application button to view its formulation framework. These are technical starting points, not certified production recipes.
PVC Pressure Pipe
Develop around the target pressure class, pipe standard, resin grade, dimensions, and long-term hydrostatic performance.
| Ingredient | Dosage approach | Purpose |
|---|---|---|
| PVC resin | 100 phr | Base polymer; select a suitable pipe grade |
| Ca/Zn stabilizer package | Dosage validated with the supplier | Thermal stability |
| Lubricant system | Supplier and trial dependent | Fusion, flow, and die release balance |
| Processing aid | As validated | Fusion and melt behavior |
| Pigment / TiO2 | As required | Color and opacity |
| Calcium carbonate | Only where permitted and validated | Filler; assess effect on pressure performance |
Pressure-pipe compliance must be established by testing against the applicable standard. Do not assume that a generic recipe or a high-output extrusion result proves pressure suitability.
PVC Drainage Pipe
Balance stiffness, impact performance, wall thickness, installation conditions, and processing consistency for non-pressure applications.
| Ingredient | Dosage approach | Purpose |
|---|---|---|
| PVC resin | 100 phr | Base polymer |
| Stabilizer package | Validated with the supplier | Thermal stability |
| Calcium carbonate | Set through testing | Stiffness and formulation adjustment |
| Impact modifier | Based on impact target | Toughness |
| Processing aid | Based on fusion and surface quality | Processing consistency |
| Lubricant system | Balanced with stabilizer package | Fusion and die release |
UPVC Window Profiles
Prioritize outdoor color retention, impact performance, fusion, surface finish, weldability, and dimensional stability.
| Ingredient | Illustrative development range | Purpose |
|---|---|---|
| PVC resin | 100 phr | Base polymer; select profile grade |
| Ca/Zn stabilizer package | Dosage validated with the supplier | Thermal stability and color control |
| Acrylic impact modifier | 5-8 phr as an initial trial range | Impact performance |
| Acrylic processing aid | 1-2 phr as an initial trial range | Fusion and melt strength |
| Exterior-grade rutile TiO2 | 3-5 phr as an initial trial range | Whiteness, opacity, weathering support |
| Calcium carbonate | 5-10 phr as an initial trial range | Stiffness and formulation adjustment |
| Lubricants | Supplier and trial dependent | Balance fusion and release |
Ranges are preliminary lab-development examples, not a validated production recipe. Stabilizer and lubricant packages must be assessed together.
UPVC Door Profiles
Develop for the profile cross-section, wall thickness, reinforcement design, welding, impact performance, and service environment.
| Ingredient | Dosage approach | Purpose |
|---|---|---|
| PVC resin | 100 phr | Strength and dimensional stability |
| Ca/Zn stabilizer | Validated with the supplier | Thermal stability and color |
| Acrylic impact modifier | Set against impact and stiffness targets | Toughness |
| Processing aid | Trial dependent | Fusion and surface quality |
| TiO2 / pigments | As required | Color and opacity |
| Mineral filler | Optimize by testing | Stiffness and dimensional behavior |
| Lubricant package | Balance with stabilizer package | Processing and release |
PVC Pipe Fittings
Distinguish injection-molding compounds from extrusion compounds. Flow behavior, fusion, shrinkage, and impact requirements depend on the process and fitting design.
| Ingredient | Selection consideration |
|---|---|
| PVC resin | Choose for molding or extrusion and the final specification |
| Thermal stabilizer | Compatibility and processing stability |
| Impact modifier | Installation conditions and required toughness |
| Processing aid | Fusion, flow, and surface finish |
| Lubricants | Balance flow and release against fusion |
| Mineral filler | Use only at validated loading allowed by specification |
PVC Cable Ducts & Electrical Conduits
Separate open cable trunking from closed electrical conduits because their geometry, installation methods, and applicable standards may differ.
| Ingredient | Selection consideration | Purpose |
|---|---|---|
| PVC resin | Suitable extrusion grade | Base polymer and mechanical properties |
| Thermal stabilizer | Compatible with the complete additive package | Processing stability |
| Impact modifier | Adjust to installation temperature and impact target | Toughness |
| Processing aid | Set for fusion and surface finish | Extrusion consistency |
| Lubricant package | Balance fusion, output, and die release | Processing control |
| Pigments and fillers | Only where compatible with electrical and mechanical requirements | Color and formulation adjustment |
| Flame-performance additives | Only if required by the applicable standard | Support specified fire performance |
PVC content or an additive alone does not certify a conduit as flame-retardant. Validate flame propagation, electrical, mechanical, and dimensional requirements to the applicable standard.
PVC Foam Panels & Boards
Choose the foam process first: Celuka, free foam, or another cellular board technology. Density, cell structure, skin quality, melt strength, and dimensional stability drive formulation choices.
| Component | Development consideration |
|---|---|
| PVC resin | Grade and melt behavior appropriate for the foam process |
| Thermal stabilizer | Heat stability throughout mixing and extrusion |
| Processing aid / melt-strength modifier | Cell stability, fusion, surface skin, and output |
| Foaming system | Type and dosage must match the process and target density |
| Regulator / cell-control package | Cell uniformity, expansion, and surface finish |
| Lubricant package | Balance fusion, release, and expansion behavior |
| Filler and pigments | Optimize against density, stiffness, color, and surface quality |
Celuka: generally targets a denser skin around a foamed core. Free foam: focuses on uniform cellular structure and surface quality. These are different process targets and should be formulated separately.
PVC Ceiling Panels
Identify whether the product is a foamed ceiling panel or a hollow multi-chamber profile. Many ceiling panels are not foamed, so the formulation must match the construction.
| Product type | Formulation priorities |
|---|---|
| Foamed ceiling panel | Density, expansion, cell uniformity, surface finish, stiffness |
| Hollow ceiling panel | Profile stiffness, dimensional accuracy, impact, fusion, and surface quality |
| Decorative ceiling board | Color consistency, print/lamination compatibility, surface appearance |
| All types | Compatible stabilizer, processing aid, lubricant, pigment, and filler system |
Do not copy a foamed-panel recipe into a hollow-profile line without process and product validation.
Outdoor Rigid PVC Products
For exterior products, balance thermal stability, pigment selection, weatherability, impact, stiffness, and surface appearance.
| Component | Selection consideration |
|---|---|
| PVC resin | Appropriate grade for the extrusion process |
| Stabilizer | Thermal stability and long-term appearance requirements |
| Weathering-grade pigments | Color retention and outdoor exposure |
| Impact modifier | Balance toughness and stiffness |
| Processing aid and lubricants | Fusion, surface finish, and stable output |
| Filler | Validate impact, stiffness, and weathering effects |
Standard vs. Premium Development
"Standard" and "premium" describe development objectives, not universally standardized grades. The correct option is the one that meets the required product specification with consistent processing.
| Feature | Standard development | Premium development |
|---|---|---|
| Raw materials | Suitable grades meeting the specification | Grades selected for tighter consistency or specific performance targets |
| Stabilizer | Compatible package for the application | Optimization of heat stability and color retention |
| Impact / processing aids | Meet required performance | Optimize toughness, fusion, surface, and process window |
| Fillers | Loading validated through testing | Particle grade and dispersion optimized where useful |
| Foam structure | Meet target density and cell quality | Further optimize density consistency, cells, skin, and dimensions |
| Quality control | Tests required by specification | Additional testing and tighter process controls where justified |
Cost optimization:
reduce total cost only while preserving required performance and compliance. Do not assume that adding more filler or reducing modifier is acceptable without testing.
Raw Materials and Their Functions
| Material | Main function | Key selection factor |
|---|---|---|
| PVC resin | Base polymer | K-value, porosity, molecular weight, consistency |
| Ca/Zn stabilizer | Thermal stabilization | Application compatibility and package dosage |
| Acrylic impact modifier | Impact performance | Stiffness, fusion, dispersion, weatherability |
| CPE impact modifier | Toughness in suitable rigid PVC compounds | Compatibility and mechanical balance |
| Acrylic processing aid | Fusion and melt strength | Output, fusion, surface finish |
| Calcium carbonate | Mineral filler and stiffness adjustment | Particle size, coating, moisture, dispersion |
| Titanium dioxide | Whiteness and opacity | Rutile grade, dispersion, weathering |
| Calcium stearate | Lubrication and processing control | Compatibility with other lubricants |
| Paraffin / PE wax | External lubrication | Fusion, release, plate-out behavior |
| Foaming agent | Cell formation in foam products | Foam process, target density, decomposition profile |
| Pigments | Color and appearance | Heat resistance, dispersion, weathering |
PHR Batch Calculator
Enter the PVC resin batch weight and additive dosages in parts per hundred resin (phr). The calculator converts each dosage into ingredient weight. It does not validate whether the recipe is technically suitable.
| Ingredient | Dosage (phr) | Calculated weight |
|---|---|---|
| PVC resin | 100 | 100.000 kg |
| Stabilizer | 4.000 kg | |
| Impact modifier | 6.000 kg | |
| Processing aid | 1.500 kg | |
| Titanium dioxide / pigment | 4.000 kg | |
| Calcium carbonate | 5.000 kg | |
| Internal lubricant | 0.500 kg | |
| External lubricant | 0.300 kg |
Total formulation: 121.300 phr
Total batch weight: 121.300 kg
Non-resin ingredients: 21.300 kg
PVC resin in total compound: 82.44%
Formula: ingredient kg = PVC resin batch kg x ingredient phr / 100. If a commercial additive package already contains lubricants or co-stabilizers, account for that package before adding separate ingredients.
Mixing, Extrusion and Quality Control
Mixing and handling
- Check resin and additives for moisture, contamination, and lot consistency.
- Follow the approved ingredient sequence and mixer supplier's operating procedure.
- Control hot-mixer temperature, mixing time, and cooling conditions.
- Ensure pigments and fillers are properly dispersed.
- Record batch numbers, process settings, and quality results.
Extrusion development
- Set process conditions for the actual extruder, screw, die, material, and target output.
- Monitor melt temperature, torque, pressure, fusion, and surface defects.
- Watch for plate-out, discoloration, roughness, and dimensional drift.
- Adjust lubrication only after checking fusion and stabilizer compatibility.
- For foam products, additionally validate expansion, cell structure, density, and skin quality.
Validation tests
| Test area | Purpose |
|---|---|
| Thermal stability | Resistance to degradation during processing |
| Fusion and processing behavior | Compound fusion and extrusion consistency |
| Impact and tensile tests | Mechanical performance |
| Hydrostatic testing | Required pressure-pipe validation |
| Dimensional inspection | Wall thickness, diameter, profile dimensions, tolerances |
| Weathering and color | Outdoor appearance where applicable |
| Electrical and flame tests | Applicable conduit / cable-management product requirements |
| Foam density and cell inspection | Density, uniformity, surface, and structural consistency |
Compliance matters.
Drinking-water pipes, pressure pipes, drainage products, electrical conduits, and architectural profiles can be subject to different standards and regulatory requirements. A recipe alone does not establish certification or compliance.
Request a Custom PVC Formulation
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Frequently Asked Questions
Can one formulation work for every rigid PVC product?
No. Pipes, profiles, electrical conduits, foam boards, and ceiling panels have different processing and performance requirements. Develop and validate each formulation for its intended application.
Does more impact modifier always improve performance?
No. The result depends on modifier chemistry, compatibility, dispersion, fusion, and the balance between toughness and stiffness.
Can calcium carbonate reduce formulation cost?
It can change material cost and stiffness, but excessive or unsuitable filler can reduce impact performance and compromise product compliance. Validate the grade and loading.
Does a flame-performance additive make electrical conduit certified?
No. The complete product must pass all applicable tests and meet the relevant requirements.
Can EXTRUTEX help develop a formulation?
A development request can establish the product, target standard, resin grade, additive package, and equipment conditions needed to plan laboratory trials and product validation.
Develop the Right PVC Formulation
Discuss PVC pipe, UPVC profile, electrical conduit, foam board, and ceiling panel formulation requirements with EXTRUTEX.
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