Smooth Finish Fire Retardant Extrude Sheet Polystyrene XPS Foam

The Smooth Finish Fire Retardant Extrude Sheet Polystyrene XPS Foam is a premium construction material known for its durability, superior thermal insulation, and enhanced safety features. Its combination of lightweight design, flame retardancy, and easy installation makes it an ideal choice for creating high-performance, energy-efficient, and safe doors. This XPS foam is engineered to provide long-lasting functionality and visual appeal, addressing the demands of modern construction.

Product Overview

This specialized extruded polystyrene foam core is designed to enhance door safety, energy efficiency, and aesthetic appeal in residential, commercial, and hospitality settings. With a density range of 38-45 kg/m³, it offers superior structural stability while maintaining a lightweight profile, making it ideal for interior doors, fire-rated doors, and decorative door panels. Certified under ISO 9001:2015 and EN 13501-1 standards, this XPS foam core ensures consistent quality and compliance with global fire safety regulations.

Material

Crafted from high-purity extruded polystyrene (XPS) using a precision extrusion process, this door core foam features a homogeneous closed-cell structure with a micro-smooth surface finish. The manufacturing process involves melting pharmaceutical-grade polystyrene resin with advanced fire-retardant additives, then extruding through a specialized die that creates uniform cell distribution with cell diameters of 0.08-0.12mm. The fire-retardant formulation meets UL 94 V-0 classification, the highest flammability rating for foam materials, ensuring self-extinguishing properties within 10 seconds of flame removal. The smooth surface is achieved through a proprietary cooling process that eliminates surface irregularities, reducing the need for additional sanding or preparation. The material contains no halogens, formaldehyde, or heavy metals, ensuring low toxicity and compliance with indoor air quality standards.

Enhanced Fire Safety

This XPS door core foam achieves a Class B-s1,d0 fire rating under EN 13501-1, indicating low smoke production and no flaming droplets during combustion. In fire resistance tests, it maintains structural integrity at 800℃ for up to 30 minutes, exceeding standard requirements for 30-minute fire-rated doors. The fire-retardant properties are homogeneously distributed throughout the material, ensuring consistent performance even if the surface is damaged during fabrication.

Superior Surface Finish

With a surface roughness (Ra) of ≤0.8μm, the foam core provides an ideal substrate for paint, veneer, laminate, and PVC coatings. This smoothness reduces adhesive usage by up to 20% during lamination while preventing telegraphing of underlying cell structure through decorative finishes. The uniform surface minimizes material waste from rework, improving manufacturing efficiency.

Thermal Insulation

Boasting a thermal conductivity of ≤0.032 W/(m·K) at 25℃, this foam core minimizes heat transfer through doors, contributing to energy savings of 15-25% in conditioned spaces. It maintains stable insulation performance across a temperature range from -40℃ to 75℃, making it suitable for climate-controlled environments such as hospitals and laboratories.

Structural Stability

With a compressive strength of ≥300 kPa, the foam core resists deformation during door fabrication, installation, and long-term use. It exhibits minimal linear expansion (≤0.05% per ℃), preventing door warping or cracking due to temperature fluctuations. The material’s high impact resistance (≥2.5 kJ/m²) ensures durability against daily wear and tear.

1. What are the primary uses of this XPS foam sheet?

The foam is primarily used in the core of high-performance doors, construction projects, industrial packaging, and energy-efficient building systems requiring thermal insulation and fire resistance.

2. How does the foam ensure thermal insulation?

The closed-cell structure and low thermal conductivity (0.028 to 0.034 W/(m·K)) effectively block heat transfer, maintaining consistent interior temperatures.

3. Can the foam sheet withstand moisture and humidity?

Absolutely! The closed-cell structure prevents water infiltration, with a water absorption rate of ≤1.0%, ensuring long-lasting performance in humid environments.

4. What compressive strength options are available?

The foam is available in grades ranging from X150 (≥150 KPa) to X500 (≥500 KPa), offering varying levels of strength for different applications.

5. Is the foam environmentally friendly?

Yes, it is manufactured using eco-friendly raw materials and processes, supporting sustainable construction and reducing environmental impact.