Mineral Filler Selection for Rigid PVC Pipes
If you make rigid PVC pipe, choose calcium carbonate around pipe performance and acceptable production cost. Relia lists coated and other carbonate candidates that can be reviewed against your resin, filler loading and extrusion conditions. This guide explains the particle, surface and moisture checks behind a shortlist, then connects them to impact, surface quality and processing trials on the pipe you actually sell.
A Factory Proposal for Your Application
Relia manufactures ground, precipitated and selected surface-coated calcium carbonate grades in China through its own factories.
Relia's calcium carbonate manufacturing focus is relevant to your pipe filler enquiry. Send Relia the current grade, resin system, loading range and finished-pipe limits. We can discuss named candidates such as the listed coated grades while keeping the actual offered specification and your production approval separate.
PVC system
Resin and formulation limits
Powder
Distribution and coarse tail
Processing
Dispersion and stable operation
Pipe result
Impact, density and accepted output
Three Starting Grades for Rigid PVC
We would begin a rigid-PVC discussion with 501, 101 and the coated GCC range, then choose candidates against your current filler. Grade 501 lists whiteness ≥95%; grade 101 is precipitated-designated; the coated GCC lists ≥98.5% CaCO3. They provide different specification routes, not a ranked performance list.
A Shortlist Around the Pipe Specification
| Review area | Listed data and acceptance basis |
|---|---|
| 501 hard-plastic grade | PVC pipes and wire tubes are named uses; whiteness ≥95% is listed. Request its measured particle and treatment data. |
| 101 precipitated-designated grade | PVC pipe and profile enquiries are named; define the actual particle profile and oil-absorption basis. |
| Coated GCC route | Seven mesh designations and ≥98.5% CaCO3 listed; agree the selected grade and coating chemistry. |
| Finished pipe | Compare dispersion, impact requirements, dimensions and accepted output in the intended resin and process. |
Catalogue Starting Points
Use these listed candidates to start a grade-specific discussion with us.
A Controlled Pipe Trial
Run the control and candidate with a consistent resin and additive package, using your team's approved pipe-test plan. Record dispersion, processing observations and the required finished-pipe results. Keep a colour comparison beside the 501 powder-whiteness requirement.
Trial controls — Keep the pipe limits first: Use your required impact, appearance and dimensional results to bound the filler comparison. Separate loading from grade: Screen the new powder at the agreed reference formulation before evaluating a new filler level. Count acceptable production: Compare raw-material use, reject level and relevant processing costs per acceptable pipe.
Particle Preparation and Surface Condition
Grinding and classification control the size distribution presented to the PVC compound; a treatment stage changes powder–binder interaction. A small median does not remove every coarse particle, and a coated label does not identify the treatment chemistry. Review the coarse tail, treatment declaration and moisture alongside your extrusion dispersion and impact results.
GCC: dry and wet routes
Relia uses both dry- and wet-grinding routes for GCC. Grinding and classification are connected to the selected powder's particle specification.
PCC: crystal formation
Relia produces PCC through calcination, slaking and carbonation. The precipitation route forms new particles rather than only grinding the starting mineral.
Selected surface-coated grades
Relia applies surface coating to selected carbonate grades. The actual treatment and intended application remain part of the grade discussion.
Defined carbonate checks
Routine batch checks cover whiteness, moisture and purity. Particle size and oil absorption are checked according to the grade or order requirements.
- Distribution
- Retain average size, D50 and D97 as their actual reported measurements.
- Surface
- Connect a treatment declaration with the application and absorption or wetting evidence.
- Identity
- Keep the selected grade and relevant method with the sample comparison.
The Grade Behind Repeated Output
For a repeat supply proposal, state the accepted model, particle limits, treatment and moisture criteria. Add the package and destination, and identify any required article-level qualification. A material enquiry for PVC does not by itself establish potable-water pipe approval.
The Next Decision
Start with Your Material Brief
Send us the details below to review a concrete grade proposal and the next evaluation step.
Qingdao Relia Industries Co., Ltd. · China manufacturing of industrial minerals, chemicals and the listed packaging products.
10 / 11Speak with Our Materials Team
Qingdao Relia Industries Co., Ltd.
Tell Relia the material, application, required grade, quantity and destination. Include the product link or the key limits you already use, so the next conversation starts with a concrete proposal.
Phone
+86 18561762631Call to discuss your enquiry.Qingdao contact address
Shuyuan Road, Qingdao,Shandong, ChinaQingdao contact address for the company.