Calcium Carbonate for PVC Industry: Enhancing Strength and Cost-Efficiency

The PVC industry thrives on a delicate balance between durability and production cost. Whether you are manufacturing rigid PVC pipes, flexible cables, or window profiles, the choice of Calcium Carbonate determines the physical properties of the end product.

With 75 years of mastery, Vigyan Lime provides high-purity, micronized $CaCO_3$ that acts as a backbone for the polymer industry.²

1. Why Particle Size (Mesh) Matters in PVC?

In PVC manufacturing, inconsistent particle size can lead to “Cracking” or “Weak Spots.”

Fine Micronization: We offer up to 1100 Mesh (10-15 Microns). Finer particles ensure a smoother surface finish and better integration with the PVC resin.³
Uniformity: Our Jodhpur and Uttarakhand units use advanced air classifiers to ensure that every bag has the same particle distribution, preventing batch-to-batch variation in your production.

2. Coated (Activated) vs. Uncoated Grade

Depending on your application, we provide two types of PVC grades:

Uncoated Grade: Ideal for standard applications where cost-efficiency is the primary goal. It offers excellent whiteness and bulk.
Coated (Activated) Grade: Our premium grade is treated with Stearic Acid. This coating creates a “hydrophobic” layer, allowing the mineral to mix perfectly with the PVC resin.
- Benefits: Lowers torque in the extruder, increases output speed, and significantly improves the Impact Strength and Elongation at Break.

3. Key Benefits for PVC Manufacturers

Whiteness & Opacity: High brightness (up to 98%) reduces the need for expensive pigments like Titanium Dioxide ( $TiO_2$ ).
Thermal Stability: Our high-purity mineral helps in maintaining the thermal stability of the PVC compound during high-temperature extrusion.
Low Abrasivity: Being naturally soft (Mohs hardness 3), Vigyan Lime’s $CaCO_3$ ensures minimal wear on your expensive extruder screws and barrels.

Technical Specifications (PVC Grade)

Parameter	Specification	Industry Benefit
Purity ( $CaCO_3$ )	98.5% Min	Stronger polymer bonding
Whiteness	96% – 98%	Superior finish & color depth
Oil Absorption	18 – 22 g/100g	Optimal resin consumption
Specific Gravity	2.7	Ideal density for PVC compounds

Frequently Asked Questions (F&Q)

Q1: How does Vigyan Lime help in reducing Titanium Dioxide ( $TiO_2$ ) consumption?

Ans: Due to our naturally high whiteness and specialized micronization, our PVC grade provides excellent opacity. By increasing the loading of our high-brightness $CaCO_3$ , manufacturers can often reduce $TiO_2$ usage by 5-10%.

Q2: Is your PVC grade suitable for high-pressure pipes?

Ans: Yes. For high-pressure applications, we recommend our Coated/Activated Grade. It provides the necessary reinforcement and impact resistance required to meet ISI and international pipe standards.

Q3: Does the mineral contain silica or sand?

Ans: No. Our “Zero-Contamination Strategy” ensures that our PVC grade is free from silica or black particles, protecting your machinery from abrasion.