Heat Insulation Material Testing

Testing scope

Inorganic fibers, organic foams, composite insulation, flexible insulation, reflective insulation, rigid insulation, rock wool products, glass wool products, silicagel fiber products, polyurethane foam, polystyrene foam (EPS/XPS), phenolic foam metal sandwich panels, vacuum insulation panels (VIP), aerogel composite material flexible foam rubber plastic, glass wool rolls, rock wool sheets, reflective insulation coatings, aluminum foil insulation rolls, radiation insulation films, aerated concrete, foam concrete, microporous calcium silicate products

Testing items

 

Thermal conductivity: The inherent heat transfer capacity of the material, measured in W/(m・K), the lower the value, the better.
Insulation materials ≤ 0.040 W/(m・K), efficient insulation ≤ 0.030 W/(m・K)
Testing methods: Protective heat plate method (GB/T 10294), heat flow meter method (GB/T 10295)
Thermal resistance: The material layer's ability to resist heat flow, measured in m²・K/W, the larger the value, the better.
Calculation formula: R = δ/λ (where δ is the material thickness and λ is the thermal conductivity)
Heat storage coefficient: The material's ability to store heat, measured in W/(m²・K), affecting the thermal stability of the enclosure structure.
Heat diffusion coefficient: The rate of temperature change of the material, measured in m²/s, reflecting the response speed of the insulation material.
Density / unit area mass: Controls the material usage and structural load. Insulation materials typically ≤ 100 kg/m³.
Compression strength: The ability to withstand pressure. Building insulation materials ≥ 100 kPa, roof insulation ≥ 200 kPa.
Tensile strength: The resistance to stretching.plates ≥ 100 kPa,roll material ≥ 150 N/50mm
Flexural elongation：Flexible materials ≥ 50%,ensuring no cracking during construction and use.
Dimensional stability：Under the condition of 70℃×48h,he deformation rate ≤ 1.0%, ensuring the dimensions remain unchanged during long-term use.
Moisture content：≤ 5%,to avoid the influence of moisture on thermal conductivity and durability.
Fire performance：Classified according to GB 8624-2025,building exterior insulation materials ≥ A2 grade,thin plastering system ≥ B1 grade.

Weather resistance：
Heat aging (80℃×168h)：Performance retention rate ≥ 80%
Dewy heat aging (70℃,90% RH×96h)：Strength loss ≤ 20%
Freeze-thaw cycles (-20℃~20℃,25 times)：Quality loss ≤ 5%, strength loss ≤ 15%

Waterproof performance：
Absorption rate (volume method)：Insulation materials ≤ 5%,water repellent type ≤ 2%
Permeability：Affecting the internal humidity balance of the enclosure structure
Bonding strength：Bonding force with the base layer ≥ 0.15 MPa,ensuring the stability of the insulation system
Impact resistance：Building external insulation ≥ 10 J,resisting external force impact without damage
Environmental performance：VOC ≤ 100 g/L,formaldehyde ≤ 0.1 g/kg,heavy metal content meets GB 30981
Processability：Convenience for cutting,drilling,and pasting in construction
Acidity coefficient：Corrosion resistance index of inorganic fiber materials,rock wool ≥ 1.6,glass wool ≥ 1.8
Water repellency：Material's ability to resist water penetration,water repellency rate ≥ 98% (GB/T 10299)
Flame drop：B1 grade materials have no flame drop,avoiding ignition of items below.

GB/T 10294-2008 Determination of Steady-State Thermal Resistance and Related Properties of Insulation Materials - Protective Thermal Plate Method
GB/T 10295-2008 Determination of Steady-State Thermal Resistance and Related Properties of Insulation Materials - Heat Flow Meter Method
GB/T 10299-2011 Test Method for Hydrophobicity of Insulation Materials
GB/T 8624-2025 Classification of Combustion Performance of Building Materials and Products (Implemented on 01/01/2027)
GB/T 8624-2012 Current Validity of Classification of Combustion Performance of Building Materials and Products until 31/12/2026
GB/T 30804-2014 Determination of Long-Term Absorption Rate after Water Immersion of Insulation Products
GB/T 30805-2014 Determination of Compressive Performance of Insulation Products
GB/T 30806-2014 Determination of Tensile Performance of Insulation Products
GB/T 30808-2014 Determination of Tensile Bonding Strength of Adhesives and Mortar Sheets for Insulation Products
GB/T 11835-2016 Insulation Materials - Rock Wool, Slag Wool and Their Products
GB/T 17795-2019 Building Insulation Materials - Glass Wool Products (Implemented on 01/07/2020) Ganzhou Municipal Market Supervision Bureau
GB/T 25975-2018 Insulation Products for External Building External Thermal Insulation
GB/T 19686-2015 Building Insulation Materials - Rock Wool
GB/T 20974-2014 Hardened Phenolic Foam Insulation Products (PF) Ganzhou Municipal Market Supervision Bureau
GB/T 10801.1-2021 Molded Polystyrene Foam Plastic (EPS) (Substituting 2002 Edition)
GB/T 10801.2-2021 Extruded Polystyrene Foam Plastic (XPS) (Substituting 2002 Edition)
GB/T 21558-2021 Building Insulation Products - Polyurethane
GB/T 17794-2021 Flexible Foam Rubber Insulation Products (Substituting 2009 Edition)
GB/T 20974-2014 Hardened Phenolic Foam Insulation Products (PF) Ganzhou Municipal Market Supervision Bureau
GB/T 23932-2021 Building Vacuum Insulation Board (VIP)
GB/T 25975-2018 Insulation Products for External Building External Thermal Insulation
GB/T 23959-2021 Building Metal-Faced Insulation Sandwich Panels
JG/T 438-2014 Reflective Heat Insulation Coatings (for Building External Surfaces)
GB/T 34336-2017 Building Insulation Products - Aerogel Insulation Products
 

Zhejiang Gangxin Testing Technology Co., Ltd.

was established in 2011. As a national high-tech enterprise recognized by the Zhejiang Provincial Higher People's Court as a judicial authentication institution for construction engineering quality, we specialize in structural performance testing and safety assessment of construction projects, special equipment, communication towers, electromagnetic environments, large bridges, and building safety appraisal.

The company has more than 100 professional and technical personnel, over 90% of whom hold various medium and senior technical certificates. Equipped with complete testing equipment worth over RMB 10 million, our business scope covers the whole country.