PVC/WPC Door Panel Foaming Regulator K400

Special Instruction:

Product Introduction：

1. Product Overview：
K400 is a high-performance PVC foaming regulator specifically designed for PVC and WPC extrusion foaming applications. As a methyl acrylate-based polymeric processing aid, it effectively promotes low-temperature melting and uniform plasticization of PVC compounds, enhances melt strength and elasticity, and significantly improves foam structure and surface quality. This makes K400 an essential additive for manufacturers producing high-quality foam boards, construction panels, door boards, and other foamed PVC/WPC profiles.

2. Product Principle：
K400 functions as a high-molecular-weight acrylic copolymer that interpenetrates and entangles with PVC molecular chains during processing. This interaction enhances melt cohesion and homogeneity, while the micro-crosslinking effect significantly increases melt strength and elongation. By improving the rheological properties of the PVC melt, K400 stabilizes the foaming process—it reinforces the cell walls during bubble expansion, preventing cell coalescence or collapse, and promotes the formation of a uniform, fine-cell structure. The result is a low-density foam (≥0.3 g/cm³) with excellent mechanical integrity and dimensional stability.

3. Performance Characteristics：
K400 delivers outstanding processing performance with a plasticizing time of just 29 seconds, enabling rapid fusion and early melt homogenization. The torque values (min. 10.3 NM, max. 53.7 NM, balanced 24.9) indicate excellent processing stability and reduced melt pulsation. The high viscosity (14 ±0.5) ensures superior melt strength and elasticity, preventing cell rupture and ensuring uniform foam structure. The low volatile content (Vdaf ≤1%) guarantees clean processing with minimal emissions, while the methyl acrylate composition provides excellent compatibility with PVC resins and other processing additives.

4. Usage and Dosage：
Recommended addition level is 5–11% based on total PVC formulation weight. For standard foam board applications requiring moderate density and good surface quality, dosages of 6–8% are typically recommended. For high-quality furniture boards and advertising boards demanding excellent surface gloss and uniform foam structure, dosages toward 8–11% deliver optimal results. Systematic trials should be conducted to optimize dosage for specific equipment, processing conditions, and target foam density requirements.

Product Advantages：

1. Promotes Low-Temperature Melting and Uniform Plasticization
K400 accelerates PVC fusion under lower processing temperatures, enabling energy savings and reduced thermal stress on the material. It ensures homogeneous plasticization throughout the melt, eliminating unmelted particles and improving overall product consistency.

2. Strengthens Melt Cohesion and Homogeneity
By increasing melt cohesion and molecular entanglement, K400 improves the uniformity of the PVC melt. This reduces melt pulsation and instability, ensuring consistent extrusion performance and dimensional accuracy in finished profiles.

3. Enhances Melt Strength and Elasticity
K400 significantly improves melt strength, elongation, and elasticity, enabling the melt to withstand the extensional forces during foaming. This prevents cell wall rupture and coalescence, producing a fine, uniform cell structure with excellent mechanical properties.

4. Reduces Melt Pulsation and Processing Instability
The improved rheological properties provided by K400 minimize melt pulsation and flow instability, resulting in smooth, consistent extrusion. This translates into higher line speeds, reduced scrap rates, and more reliable production.

5. Promotes Smooth Surface and High Gloss
With excellent dispersibility in PVC formulations, K400 ensures a smooth, glossy surface finish free from defects such as roughness, die lines, or orange peel. This enhances the aesthetic appeal of foam boards, advertising panels, and furniture components.

6. Excellent Dispersibility and Compatibility
K400 disperses readily in PVC compounds, ensuring uniform distribution throughout the melt. Its excellent compatibility with PVC resins, stabilizers, lubricants, and foaming agents simplifies formulation development and ensures consistent product quality.

7. Tailored for Low-Density Foaming Applications
With a suited foaming density of ≥0.3 g/cm³, K400 is specifically engineered for low-density foam production. It enables significant weight reduction while maintaining structural integrity, making it ideal for lightweight furniture boards, cabinet panels, and construction materials.

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 acids or alkalis.

Applications：

1. PVC/WPC Foam Boards – K400 is widely used in the production of PVC and WPC foam boards, including furniture boards, cabinet boards, and construction boards. It promotes uniform cell structure, reduces density, and enhances surface quality for premium applications.

2. PVC Advertising Boards – For advertising and display boards, K400 ensures smooth, glossy surfaces with excellent printability and dimensional stability. The fine cell structure provides a clean, professional appearance essential for signage and exhibition panels.

3. PVC Door Boards and Profiles – In door board production, K400 enhances melt strength and foam stability, producing lightweight, durable boards with consistent thickness and mechanical properties.

4. WPC Extrusion Foaming Products – K400 is suitable for WPC foam profiles used in decking, fencing, and cladding, where it improves cell uniformity, surface finish, and overall product durability.

5. PVC Construction Panels – For building and construction panels, K400 provides the structural integrity and insulation properties needed for energy-efficient, lightweight building solutions.

6. High-Gloss Decorative Profiles – In applications requiring superior surface appearance, K400 delivers the smooth, high-gloss finish desired for decorative trim and architectural moldings.

7. Lightweight Packaging Foams – Where weight reduction and cushioning properties are essential, K400 enables the production of low-density foams with consistent cell structure and mechanical strength.

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.

FAQ:

1.What is the MOQ?

MOQ. is about 1tons

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 .