PVC Co-Extrusion Board Products Special Ca/Zn Heat Stabilizer CZ75

Product Name：
PVC Co-Extrusion Board Products Special Ca/Zn Heat Stabilizer CZ75

Special Instruction:

Product Introduction：

1. Product Overview：
CZ75 is a high-performance calcium-zinc (Ca/Zn) heat stabilizer specifically designed for PVC extrusion products. As an environmentally friendly stabilizer, it is widely used in the production of PVC window profiles, door frames, wall boards, pipes, roof tiles, and similar extruded profiles. With active substance content ≥99%, it delivers exceptional thermal stability while providing excellent lubricity and a unique coupling effect.

2. Product Principle：
CZ75 functions through a synergistic combination of zinc stearate and calcium stearate, which work together to neutralize hydrogen chloride released during PVC thermal degradation. The calcium component provides long-term thermal stability by forming stable chlorides, while the zinc component offers initial color hold and processing stability. The auxiliary lubricants reduce internal friction between polymer chains, promoting smooth flow and uniform fusion. Additionally, the unique coupling effect enhances interfacial adhesion between PVC resin and inorganic fillers, improving filler dispersion and overall composite integrity.

3. Performance Characteristics：
As a premium PVC heat stabilizer, CZ75 delivers outstanding thermal stability with minimal volatile loss (≤2%) during high-temperature processing. The melting point of 105°C ensures complete fusion early in the extrusion process, providing immediate protection against degradation. The low density of 0.35 g/cm³ facilitates easy dispersion throughout the PVC compound. The stabilizer exhibits excellent lubricity, reducing mechanical wear on processing equipment and extending service life. Its coupling effect improves resin-filler interaction, resulting in enhanced mechanical properties and superior surface brightness in finished products.

4. Usage and Dosage：
Recommended addition level is 3–5 phr based on total PVC formulation weight. For standard window profile and pipe applications, 3.5–4.5 phr typically provides optimal stability and processing performance. For highly filled formulations or demanding extrusion conditions, dosages toward 5 phr may be employed. Systematic trials should be conducted to optimize dosage for specific equipment, filler types, and processing parameters.

Product Advantages:

1. Environmentally Friendly Ca/Zn Stabilizer：
CZ75 is completely free from lead, cadmium, and other heavy metals, complying with global environmental regulations including RoHS and REACH. It provides a safe, sustainable alternative for manufacturers producing eco-friendly PVC products.

2. Excellent Thermal Stability and Initial Color Hold：
The balanced Ca/Zn system delivers outstanding heat stability throughout the extrusion process, preventing discoloration, burning, and degradation. Products maintain consistent color and properties even under prolonged processing or high-temperature conditions.

3. Superior Lubricity and Reduced Equipment Wear：
Integrated lubricant components reduce friction between the melt and processing equipment, minimizing wear on screws, barrels, and dies. This extends equipment service life, reduces maintenance costs, and enables smoother, more efficient extrusion.

4. Unique Coupling Effect for Enhanced Filler Dispersion：
CZ75’s coupling action improves interfacial bonding between PVC resin and fillers such as calcium carbonate or talc. This results in better filler dispersion, increased product strength, reduced brittleness, and overall improved mechanical performance.

5. Enhanced Surface Brightness and Aesthetic Quality：
The excellent lubricity and filler dispersion contribute to superior surface finish. Extruded products exhibit high gloss, smooth texture, and absence of die lines or surface defects, enhancing market appeal.

6. Improved Processing Efficiency：
By reducing melt viscosity and improving flow characteristics, CZ75 enables higher extrusion speeds, lower energy consumption, and more consistent product dimensions. This translates into increased productivity and reduced manufacturing costs.

7. Versatile Application Across Multiple PVC Extrusions：
CZ75 performs effectively in a wide range of PVC profiles, including window frames, door boards, wall panels, pipes, and roof tiles. Its balanced formulation simplifies inventory management for manufacturers producing diverse product lines.

8. Long-Term Stability and Product Durability：
The stabilizer provides sustained protection against thermal degradation, ensuring PVC products maintain their mechanical integrity and appearance over extended service life, even under outdoor exposure conditions.

General instructions:

Packing: 25 kg/bag
Storage: Conventional storage
Processing: Valid for 2 years
Note: Store in a cool, dry warehouse away from heat, sunlight, moisture, and incompatible substances like strong oxidants or acids.

Applications:

1. PVC Window Profiles and Door Frames：
CZ75 is ideal for extruded window and door profiles, providing exceptional thermal stability and surface brightness. Profiles maintain dimensional accuracy and aesthetic appeal even under prolonged UV exposure and temperature cycling.

2. PVC Wall Boards and Ceiling Panels：
For interior and exterior wall cladding, CZ75 ensures uniform stabilization, excellent filler dispersion, and smooth, high-gloss surfaces that resist yellowing and degradation over time.

3. PVC Pipes and Conduits：
In pipe extrusion, CZ75 delivers the thermal stability needed for consistent wall thickness and pressure resistance. Its lubricity reduces die buildup, enabling longer production runs and superior internal surface quality.

4. PVC Roof Tiles and Siding：
For outdoor roofing applications, CZ75 provides the weatherability and UV resistance essential for long-term performance. The enhanced lubricity ensures consistent profile geometry and reduces maintenance requirements.

5. PVC Decorative Profiles and Trim：
In decorative moldings and trim, CZ75 contributes to brilliant surface gloss and defect-free finishes, enhancing the aesthetic value of finished installations.

6. PVC Technical Profiles：
For specialized profiles requiring precise dimensions and consistent mechanical properties, CZ75 offers the processing stability and filler compatibility necessary for high-quality results.

7. PVC Foamed Profiles：
In foamed PVC applications, CZ75 maintains melt strength and cell uniformity while providing thermal protection, resulting in lightweight profiles with excellent surface finish.

8. Recycled PVC Extrusion：
For formulations using recycled PVC, CZ75 compensates for reduced thermal stability, improving processability and final product properties while maintaining environmental compliance.

Company Introduction：
Maijisen is a technology-driven manufacturer of PVC additives, headquartered in Kunshan, Jiangsu. Since 2009, we have specialized in calcium zinc stabilizers, PVC processing aids, foaming regulators, and lubricants. Our products are used in PVC/WPC profiles, boards, flooring, pipes, cables, and footwear. With a 12,000 sqm production base and a 400 sqm R&D center in Yancheng, we are committed to innovation and quality. Our products are trusted in global markets across Europe, Americas, and Southeast Asia.

RFQ：

1.What is the MOQ?

MOQ. is about 1ton.

2.What if your payment term?

Payment terms:100% by T/T ,30% by T/T and 70% by L/C;

3.What about the delivery?

Delivery date:10 days.

4.Can you supply free samples?

Of course,we can supply you 200g~500g per product.