Calcium Zinc Stabilizer CZ759 for PVC Non-foaming Profile

Product Name：
Calcium Zinc Stabilizer CZ759 for PVC Non-foaming Profile

Special Instruction:

Product Introduction：

1. Product Overview：
CZ759 is a high-performance calcium-zinc (Ca/Zn) heat stabilizer designed for PVC SPC, non-foaming profiles and boards, and PVC/CPVC/UPVC pipe production. With an active substance content of ≥97% and a melting range of 110–135°C, it delivers excellent thermal stability, good lubricity, and a unique coupling effect that improves filler dispersion and product performance. This eco-friendly stabilizer meets RoHS standards, making it ideal for manufacturers producing rigid PVC extrusions with superior surface quality and dimensional accuracy.

2. Product Principle：
CZ759 combines zinc stearate, calcium stearate, and auxiliary lubricants. The calcium component neutralizes hydrogen chloride released during PVC degradation, forming stable chlorides for long-term stability. Zinc stearate ensures initial color hold and processing stability. The integrated lubricants reduce internal friction, lowering melt viscosity and torque. The coupling effect enhances interfacial adhesion between PVC and inorganic fillers (e.g., CaCO₃), improving dispersion and mechanical integrity. The 110–135°C melting range ensures early activation and sustained protection during the entire extrusion process.

3. Performance Characteristics：
CZ759 delivers outstanding thermal stability with a volatile content ≤2% and active substance ≥97%, ensuring clean processing with minimal smoke, odor, or plate-out. The density of 0.35 ±0.05 g/cm³ facilitates dust-free handling and rapid dispersion. Its good lubricity reduces mechanical wear on screws, barrels, and dies, extending equipment life. The unique coupling effect significantly improves filler dispersion, resulting in higher impact strength, flexural modulus, and surface gloss. The stabilizer is fully RoHS compliant and suitable for both single- and twin-screw extruders.

4. Usage and Dosage：
Recommended addition level is 3–5% based on total PVC formulation weight. For standard SPC flooring (200–300 phr CaCO₃) and rigid pipes, 3.5–4.5% typically provides optimal stability and processing performance. For high-speed extrusion or recycled content, dosages toward 5% are recommended. Systematic trials should be conducted to optimize for specific equipment and formulations.

Product Advantages:

1. Excellent Thermal Stability for Rigid Extrusions
Prevents degradation, discoloration, and blistering in SPC boards, profiles, and pipes even at high line speeds, ensuring consistent colour and mechanical properties.

2. Good Lubricity & Reduced Equipment Wear
Lowers extrusion torque and energy consumption, extending screw/barrel life, reducing cleaning downtime, and lowering maintenance costs.

3. Unique Coupling Effect for Superior Filler Dispersion
Improves bonding between PVC and high filler loadings (≥200 phr CaCO₃), enhancing flexural strength, impact resistance, and reducing brittleness without sacrificing surface finish.

4. Enhanced Surface Quality and Aesthetics
Produces smooth, high-gloss surfaces free from die lines or rough spots, reducing the need for costly secondary finishing.

5. Environmentally Friendly & RoHS Compliant
Contains no lead, cadmium, or other heavy metals. Meets RoHS and global environmental standards for eco-friendly building materials and exported goods.

6. Wide Processing Window & Versatility
Melting range of 110–135°C allows reliable use on single-screw and twin-screw extruders for SPC, UPVC pipes, CPVC applications, and non-foaming boards.

7. Prolonged Equipment Service Life
Reduced mechanical wear from lubricating and coupling effects significantly extends the lifetime of extruder components and dies.

8. Improved Dimensional Accuracy & Low Shrinkage
Early activation and uniform melt viscosity reduce post-extrusion shrinkage and warpage, ensuring tight tolerances (≤0.05 mm) for click-lock profiles and pipe dimensions.

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 strong oxidants or acids. Keep containers sealed when not in use.

Applications：

1. PVC SPC Rigid Core Flooring
CZ759 is ideal for SPC planks and tiles, providing excellent thermal stability, low shrinkage, and superior filler dispersion for tight thickness control and reliable click-lock assembly.

2. PVC Non-Foaming Profiles & Boards
For window trim, skirting, wall panels, and rigid sheets, it ensures smooth surfaces, dimensional stability, and long-term weatherability with minimal die buildup.

3. PVC Pipes (UPVC/CPVC)
In pressure pipes, drainage pipes, electrical conduits, and CPVC hot water pipes, CZ759 offers robust heat stability, good lubricity, and clean processing for smooth inner/outer surfaces.

4. Highly Filled Rigid Extrusions (>200 phr filler)
The coupling effect maintains mechanical strength and prevents melt fracture, enabling cost-effective formulations without compromising quality.

5. Co-extruded PVC Products
Stabilizes the rigid core without affecting adhesion to capstocks or causing outgassing delamination.

6. Recycled PVC Rigid Extrusions
Stabilises impurities, allowing up to 30% reclaim content while preserving surface finish and mechanical performance.

7. Calendered Rigid PVC Films
Provides early activation and clean release for blemish-free films with excellent gloss (e.g., stationery, packaging).

8. PVC/CPVC Industrial Profiles
For chemical-resistant profiles and speciality extrusions, CZ759 delivers reliable stabilization and processing consistency.

Company Introduction：
Kunshan Maijisen Composite Material Co., Ltd. is a technology-driven manufacturer of innovative plastic processing additives. Our main product lines include stabilizers, acrylic impact modifiers, PVC processing aids, foaming regulators, foaming agents, lubricants, and other advanced chemical additives. Our products are widely used in WPC and PVC window profiles, foam boards (furniture boards, advertising boards, construction boards), WPC wall panels, WPC and SPC flooring, pipes and fittings, 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 globally across Europe, Americas, and Southeast Asia.

RFQ：

1. What is the MOQ?
   MOQ is about 1 ton.

2. What are your payment terms?
   Payment terms: 100% T/T, or 30% T/T + 70% L/C.

3. What about delivery?
   Delivery time: 10 days.

4. Can you supply free samples?
   Yes, we can supply 200g–500g per product for testing.