Graphite-extruded polystyrene board
A closed-cell rigid foam insulation board manufactured from polystyrene resin, incorporating graphite particles and a flame retardant, and produced via an extrusion molding process.
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Graphite-extruded polystyrene board
A closed-cell rigid foam insulation board manufactured from polystyrene resin, incorporating graphite particles and a flame retardant, and produced via an extrusion molding process. The extrusion process ensures fully closed, uniformly distributed cells, delivering an exceptionally low thermal conductivity, high compressive strength, and excellent water resistance—making it ideal for applications with stringent requirements for thermal insulation and compressive performance.
Performance Metrics
1. Combustion performance: Class B1 (flame-retardant)
2. Thermal conductivity: ≤0.024 W/(m·K) (at 25°C)
3. Bulk density: 28–35 kg/m³
4. Water absorption (by volume): ≤1% (after 24 hours of immersion)
5. Compressive strength: ≥0.25 MPa (at 10% deformation)
6. Dimensional Stability: ≤1% (70°C ± 2°C, 48 h)
7. Water vapor transmission coefficient: ≤0.018 ng/(Pa·m·s)
8. Freeze–Thaw Resistance: After 25 freeze–thaw cycles, mass loss ≤ 1% and strength loss ≤ 10%.
Scope of Application
It is used as an insulation layer in residential buildings, public buildings, commercial buildings, and for energy‑saving retrofits of existing structures.
Product Advantages
1. Outstanding thermal insulation performance: closed-cell content ≥ 98%, with a thermal conductivity as low as 0.024 W/(m·K), making it the best among organic insulation materials.
2. Excellent compressive strength: At a density of 28–35 kg/m³, the compressive strength is ≥0.25 MPa, enabling it to withstand pedestrian‑rated roof loads.
3. Excellent water resistance: Water absorption ≤ 1%, significantly lower than other insulation materials, making it suitable for humid environments.
4. Excellent durability: strong chemical stability, resistance to aging and ultraviolet radiation, with a service life of ≥30 years.
5. Wide applicability: Suitable for a variety of complex scenarios, balancing thermal insulation with structural load-bearing requirements.
Instructions for Use
1. Substrate Preparation: The substrate must be smooth (deviation ≤ 3 mm/2 m) and dry (moisture content ≤ 8%), with oil stains and loose dust thoroughly removed.
2. Surface Treatment: Apply a specialized interface agent or perform roughening on the extruded board surface to enhance adhesion with the bonding mortar.
3. Bonding Installation: Apply the adhesive using either the strip‑bonding method or the spot‑and‑frame method, with adhesive mortar strips 50 mm wide and spaced 150 mm apart; leave a 50‑mm margin along the edges, ensuring a bonding area of at least 50%.
4. Anchoring and Fixing: After 24 hours of adhesive application, install plastic expansion anchors. The anchor length must penetrate the insulation layer and extend into the substrate by at least 50 mm, with a density of 6–8 anchors per square meter.
5. Protective Layer: Apply a 3–5 mm-thick finishing mortar and embed an alkali-resistant fiberglass mesh (with an alkali-resistant breaking strength of ≥750 N/50 mm).
6. Finished-product protection: Avoid impacts and exposure to rain for 7 days after construction; when temperatures fall below 5°C, implement winter‑construction measures.
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