What benefits does calcium carbonate bring to plastic pipe manufacturing?

It increases pipe stiffness (impact resistance and flexural modulus), improves dimensional heat stability, speeds up cooling cycles, and significantly lowers raw material cost.

What is the difference between coated and uncoated calcium carbonate?

Uncoated calcium carbonate is used in water-based systems like paints, whereas stearic acid coated calcium carbonate is used in plastic polymers to ensure chemical compatibility.

What loading percentage of calcium carbonate is typical in PVC pipes?

Rigid PVC conduit and drainage pipes typically contain 10% to 30% coated calcium carbonate loading, depending on pipe pressure rating and wall thickness.

Where can I buy plastic grade calcium carbonate in Nairobi?

Kiki's Industrial Chemicals stocks stearic acid coated plastic grade calcium carbonate in 25kg bags at our Nairobi Industrial Area warehouse.

Is this grade suitable for plastic filler masterbatch production?

Yes, its fine particle size and uniform coating make it ideal for compounding PE/PP filler masterbatches used in woven sacks and blown film.

Does calcium carbonate affect PVC pipe surface finish?

Properly surface-treated ultra-fine calcium carbonate produces a smooth, glossy surface finish on extruded PVC pipes and fittings.

How does it protect extrusion machinery?

The fatty acid coating acts as an internal lubricant during processing, reducing friction, melt viscosity, and barrel/screw abrasion.

Can it be used in flexible PVC cable compounds?

Yes, it provides electrical insulation stability and flame resistance in flexible PVC wire and cable insulation formulations.

Do you supply plastic raw materials across East Africa?

Yes, we ship plastic grade calcium carbonate to pipe extruders and plastic compounders in Kenya, Uganda, Tanzania, and Rwanda.

How should plastic grade calcium carbonate be stored?

Keep bags sealed in a dry environment off concrete floors to prevent moisture adsorption that could cause moisture void bubbles in extruded plastic.

What packaging sizes are available?

We supply plastic grade calcium carbonate in 25kg PE-lined moisture-proof bags and 1,000kg jumbo bags.

Quick Answer: Calcium Carbonate for Plastic & PVC Manufacturing

Calcium Carbonate for Plastic & PVC Manufacturing is an industrial-grade ultra-fine powder formulated for plastic & polymer additives applications.

Plastic Additives & Polymers

Calcium Carbonate for Plastic & PVC Manufacturing

Product Code: KIC-PLAS-001

Also known as:PVC Filler · Coated Calcium Carbonate · Stearic Acid Treated CaCO3

Chemical aliases:Calcium carbonate · Precipitated Calcium Carbonate (PCC) · Surface Modified Limestone · Plastic Extrusion Filler

Calcium Carbonate for Plastic & PVC Manufacturing is an industrial-grade ultra-fine powder formulated for plastic & polymer additives applications. KIKI'S Industrial Chemicals supplies commercial volumes from Nairobi to manufacturers and processing facilities across Kenya and the East African region.

Supplied as Plastics & Extrusion Grade (Stearic Acid Coated / Uncoated), 98.5% min CaCO3, ultra-fine powder. Principal commercial applications include PVC Pipe Extrusion Filler, Thermoplastic Compound Modification.

Procurement note: Specify whether stearic acid coated or uncoated grade is required for your extrusion or compounding line.

CAS Number: 471-34-1
Formula: CaCO3
IUPAC Name: Calcium carbonate
Molecular Weight: 100.09 g/mol
EC Number: 207-439-9
Chemical Family: Inorganic Carbonates
Grade: Plastics & Extrusion Grade (Stearic Acid Coated / Uncoated)
Purity: 98.5% min CaCO3
Physical Form: Ultra-Fine Powder

Available Packaging

25kg Paper-Plastic Composite Moisture Proof Bag1,000kg Jumbo Bulk Bag

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Product Overview

Calcium Carbonate for Plastic & PVC Manufacturing acts as a functional filler that reduces resin consumption while enhancing impact strength, dimensional stability, heat resistance, and surface finish in rigid PVC pipes, fittings, conduit, cable compounds, and masterbatches.

Technical Description

Micro-ground calcium carbonate surface-modified with stearic acid coupling agents to ensure superior hydrophobic dispersion in PVC, Polyethylene (PE), and Polypropylene (PP) matrices. Low oil absorption minimizes plasticizer consumption.

Complete Chemical Specifications

CaCO3 Content: 98.5% min
Stearic Acid Coating: 1.0% – 1.2% active coating
Whiteness (R457): 95.0% min
D50 Average Particle Size: 1.5 – 2.5 microns
D97 Top Cut: 8.0 – 10.0 microns
DOP Oil Absorption: 16 – 20 g/100g
Moisture Content: 0.2% max

Physical & Chemical Properties

Appearance: Bright white ultra-fine free-flowing powder
Odour: Odorless
pH: 8.8–9.6
Density: 2.71 g/cm³ (Bulk density: 0.8–1.1 g/cm³)
Melting Point: 825 °C (decomposes)
Solubility: Insoluble in water and polymer melts

Commercial Availability

Stock Status: In Stock
Lead Time: 1-2 business days in Nairobi industrial area; express dispatch to East Africa
MOQ: 1,000 kg (40 bags)
Delivery Regions: Nairobi Commercial Hub, Kenya Nationwide Delivery, East Africa Regional Supply

Specify whether stearic acid coated or uncoated grade is required for your extrusion or compounding line.

Commercial Sectors

Target Industries

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Heavy-duty twin corrugator and die-block extrusion line producing corrugated plastic conduit pipe

Industry Sector

Plastics & PVC Manufacturing Chemical Raw Materials Kenya

Kenya's plastics and PVC conversion sector—producing water pipes, electrical conduits, packaging films, and molded components—depends on precise compounding chemistry. Processing heat degradation, poor filler dispersion, and polymer brittleness can halt high-speed extrusion lines. KIKI'S supplies premium calcium carbonate extenders, plasticizers, lubricants, and PVC solvent cement reagents to leading converters.

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Process Compatibility

Suitable Applications

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Application Guide

PVC Pipe Extrusion Filler

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Application Guide

Thermoplastic Compound Modification

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Use Cases

•Rigid PVC pipe and fitting extrusion formulation
•uPVC window profile and trunking manufacturing
•PE and PP filler masterbatch production
•Calendered PVC flooring and synthetic leather sheets

Storage Guidelines

Store in clean, dry ambient conditions. Avoid exposure to high humidity or moisture which can cause caking and affect dispersion in polymer melts.

Handling Advisory

Dust mask and protective eyewear recommended during powder transfer to extruder hoppers.

Safety & Chemical Handling Advisory

Safety Advisory

Flush eyes thoroughly with clean water. Remove to fresh air if inhaled.

GHS:Non-hazardous substance

Signal Word:None

Transport:Non-regulated cargo

Packing Group:N/A

Hazard Statements

• Inhalation of high dust concentrations may cause mild airway irritation

Precautionary Statements

• Ensure adequate local exhaust ventilation at feeding hoppers

PPE Requirements

Dust Mask (N95)Safety GlassesIndustrial Gloves

COMMERCIAL & TECHNICAL GUIDANCE

Frequently Asked Questions: Calcium Carbonate for Plastic & PVC Manufacturing

Technical, regulatory, and supply guidance for Calcium Carbonate for Plastic & PVC Manufacturing.

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Technical Guides & Resources for Calcium Carbonate for Plastic & PVC Manufacturing

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Guides & How-Tos

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