Calcium Powder (Calcium Carbonate) Product Introduction

Calcium Powder (Calcium Carbonate, CaCO₃)** is the most widely used inorganic powder filler in the industrial field, commonly known as "limestone powder" or "calcite powder". It is prepared from natural minerals or chemical synthesis, presenting as a white, odorless powder with stable chemical properties and high cost performance. It is widely used in plastics, rubber, papermaking, coatings, building materials, food, medicine and other industries.

I.Product Classification and Characteristics

1. Ground Calcium Carbonate (GCC)

Raw Material: High-quality calcite, marble, limestone

Process: Physical crushing, grinding and classification (no chemical reaction)

Appearance: White powder with irregular particles

Core Parameters:

CaCO₃ Content: ≥97.0%~98.5%

Whiteness: 88%~93%

Particle Size: 325~3000 Mesh (5~50μm)

Bulk Density: 0.8~1.3g/cm³

Oil Absorption Value: 40~60mL/100g

Moisture: ≤0.3%

Advantages: Low cost, wide source, good stability, low oil absorption value and large filling capacity

2. Precipitated Calcium Carbonate (PCC)

Process: Limestone calcination → slaking → carbonation → drying → classification (chemical synthesis)

Appearance: White ultra-fine powder with regular particles (spindle/diamond shape)

Core Parameters:

CaCO₃ Content: ≥98.0%~99.0%

Whiteness: 92%~96%

Particle Size: 1~10μm (nano-grade up to 20~100nm)

Bulk Density: 0.5~0.7g/cm³

Oil Absorption Value: 60~90mL/100g

Advantages: High purity, good whiteness, fine particle size, excellent dispersibility and strong reinforcing property

3. Activated (Modified) Calcium Carbonate

Process: Surface modification of GCC/PCC with coupling agent (e.g., stearic acid)

Characteristics: Oil-philic and water-repellent surface, excellent compatibility with polymers (plastics/rubber)

Advantages: Improve the toughness, strength, heat resistance and processing fluidity of products

4. Nano Calcium Carbonate

Particle Size: 1~100nm

Characteristics: Small size effect,functional reinforcement

Application: High-end plastics, rubber, coatings, adhesives, sealants

II.Main Application Fields

1. Plastic Industry

GCC: PVC pipes/profiles, films, injection moldings — cost reduction, volume increase, improvement of rigidity/heat resistance

PCC/Activated Calcium: High-end plastics, engineering plastics — improve toughness, gloss and dimensional stability

Nano Calcium: Modified PP/PE, cable materials — reinforcement, toughening, improvement of flexural strength

2. Rubber Industry

Tires, hoses, seals, shoe soles — filling and cost reduction, reinforcement, wear resistance, tear resistance, improvement of vulcanization performance

3. Papermaking Industry

GCC: Newsprint, packaging paper — filler, whitening, improvement of smoothness/opacity, cost reduction

 

PCC: Coated paper, art paper — coating pigment, high gloss, high retention rate

4. Coatings/Paints/Inks

Extender pigment, replacing part of titanium dioxide — thickening, anti-settling, improvement of covering power, gloss and leveling property

Inks: Adjust viscosity, drying speed and printing adaptability

5. Building Materials and Construction

Cement, concrete, putty powder, gypsum board, tile adhesive — increase strength, stability and reduce cost

6. Food and Medicine (Food Grade/Pharmaceutical Grade)

Food: Anti-caking agent, leavening agent, calcium supplement raw material (chewing gum, chocolate)

Medicine: Calcium tablets, antacids, pharmaceutical excipients (purity ≥99.0%, heavy metals ≤10ppm)

7. Others

Feed additives, toothpaste abrasives, adhesives, ceramics, daily chemicals, environmental desulfurization

III.Product Advantages

Cost Effectiveness: Greatly reduce raw material costs, the most cost-effective inorganic filler

Stable Performance: Non-toxic, odorless, acid and alkali resistant, heat resistant (stable below 400℃), non-volatile and non-migratory

Processing Friendliness: Easy to disperse, non-corrosive to equipment, improve rheological properties

Environmental Safety: Derived from natural minerals, no heavy metals, no radiation, in line with EU REACH and FDA standards

Complete Specifications: 325~6000 Mesh, ordinary/activated/nano-grade, food/pharmaceutical grade fully covered

IV. Selection Guide

Pursuing cost reduction and large filling capacity → Ground Calcium Carbonate (325~1250 Mesh)

Pursuing high whiteness, high gloss and fine particle size → Precipitated Calcium Carbonate

Plastic/rubber polymer system → Activated (Modified) Calcium Carbonate

High-end products requiring reinforcement and toughening → Nano Calcium Carbonate

Food/medicine → Food Grade/Pharmaceutical Grade Precipitated Calcium Carbonate