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Talc Powder vs Calcium Carbonate for Polypropylene: A Filler Comparison
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Read articleGround Calcium Carbonate600–2500 mesh
Ground Calcium Carbonate for PVC
600–2500 mesh calcite powder from selected Haicheng calcite, covering filler demand across rigid and flexible PVC formulations — COA with every batch, custom targets on request.
Where GCC sits in a PVC formulation
In rigid PVC — pipe, fittings, profiles and siding — ground calcium carbonate is the standard mineral filler: it raises stiffness, stabilises dimensions during and after extrusion, and reduces formulation cost per tonne while keeping the process stable.
In flexible and plastified PVC — cable compounds, footwear, flooring and film — GCC acts as an inert filler that adjusts hardness and lowers cost. Fineness and whiteness decide how fine a surface the finished product can carry.
GCC grades for PVC formulations
| Grade | Mesh size | Purity | Whiteness | Moisture |
|---|---|---|---|---|
| Calcium Carbonate Powder 600 Mesh | 600 | 25-97 | 83-97 | ≤0.3 |
| Calcium Carbonate (Calcite) Powder 800 Mesh | 800 mesh | 20-97 | 83-97 | ≤ 0.3% |
| Calcium Carbonate Powder 1000 Mesh | 1000 | 25-98 | 85-97 | ≤0.5 |
| Calcium Carbonate Powder 1250 Mesh | 1250 | 50-98 | 85-96 | ≤0.3 |
| Calcium Carbonate Powder 1500 Mesh | 1500 | 93 | 85-95 | ≤0.3 |
| Calcium Carbonate Powder 2500 Mesh | 2500 | 96 | 93 | ≤0.3 |
Values are typical production ranges per grade. Final values follow your confirmed specification, with a COA issued for every batch. Custom targets on request.
Selection notes by PVC application
Pipe and fittings
Coarse-to-medium grades in the 600–800 mesh band carry high loading in pressure pipe and fittings. Consistency of the particle size distribution matters most on long extrusion runs.
Profiles and visible surfaces
800–1250 mesh balances loading and surface finish on window profiles, siding and trim where the surface is exposed.
Cable compounds
Fine grades with controlled impurities are used in insulation and sheathing compounds; if your compound relies on surface treatment, confirm the requirement with us before sampling.
Plasticised and flexible goods
Flooring, footwear and film use medium-fine GCC to adjust hardness and cost; whiteness drives the brightness the finished surface can carry.
Packaging & logistics
Packaging
- Standard25/50 kg bags · jumbo bag · OEM
- DetailsPackaging & loading page
Samples & lead time
- MOQ1 × 20 ft container
- Lead time7 – 15 days after order confirmation
- SampleFree sample, courier cost on buyer
Download TDS (PDF)
Request a sample or a quote
Tell us the PVC application, target mesh and required indicators — we will reply with the closest grade, a TDS and a free sample.
Frequently Asked Questions
What does GCC do in a rigid PVC formulation?
In rigid PVC such as pipe, fittings and profiles, ground calcium carbonate raises stiffness, improves dimensional stability and reduces formulation cost per tonne. Particle size distribution matters more than the top mesh number alone, so we recommend confirming the grade against your extrusion line with a trial before scaling up.
Which mesh suits PVC pipe, profile or cable compounds?
Typical starting points: 600–800 mesh for pipe and fittings, 800–1250 mesh for profiles and other visible surfaces, and finer grades (1500–2500 mesh) for surface-critical or high-fill applications. These are starting points, not limits — send us the formulation target and we will confirm the closest grade with a TDS and a sample.
Are the grades coated or uncoated?
The grades listed on this page are uncoated. If your formulation requires a surface-treated grade — common in cable compounds and some high-fill profiles — tell us the treatment requirement and we will confirm feasibility and quote before samples are shipped.
Related reading
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Read articleStandards and sources quoted
The quotations below are taken verbatim from published standards; each link goes to the issuing body's official page.
“This document specifies requirements and corresponding methods of test for whiting.”
— ISO — International Organization for Standardization, ISO 3262-4:2023, Extenders — Specifications and methods of test — Part 4: Whiting, official source
“This document gives the definition for the term extender and specifies test methods that are required for most of the subsequent parts of ISO 3262.”
— ISO — International Organization for Standardization, ISO 3262-1:2020, Extenders — Specifications and methods of test — Part 1: Introduction and general test methods, official source
Need a custom specification?
Tell us your target mesh size, whiteness and application. We send samples and a quotation within 24 hours.