Label film

Printing film

The standards of rock wool board involve many aspects, including appearance quality, dimensional deviation, physical properties, construction and acceptance standards, etc. The following is a detailed summary of the standards of rock wool board:

Packaging film

1. Appearance quality
   The surface of the rock wool board should be flat, without scars, stains, or damage that hinder its use, and the color should be uniform. At the same time, the rock wool board should be dry, free of oil, wax, release agent, paint, weathering, dirt, frost, mud and other materials that hinder bonding, without obvious damage, missing edges, corners, cracks and other defects; the color is uniform, without burning, scarring, inclusions and other phenomena.
2. Dimension deviation
   The dimensional deviation of the rock wool board shall comply with the following provisions:

Length: The allowable deviation is ±15mm.

Width: The allowable deviation is ±5mm.

Thickness: When the thickness is ≤50mm, the allowable deviation is ±3mm; when 50mm75mm, the allowable deviation is ±5mm.
Diagonal difference: The difference between the lengths of the two diagonals of the board is not greater than 15mm.

3. Physical properties
   The physical properties of the rock wool board should meet the following requirements:

Density: The allowable deviation of density is ±10% of the nominal value. Common rock wool board densities are 100kg/m³, 120kg/m³, 140kg/m³, etc.
Average fiber diameter: not greater than 7.0μm.
Slag ball content: The content of slag balls with a particle size greater than 0.25mm does not exceed 10.0% (mass fraction).
Thermal conductivity: When the average temperature is 25℃, the thermal conductivity is not greater than 0.040W/(m·K).
Maximum operating temperature: generally not less than 600℃.
Combustion performance: non-flammable, belonging to Class A non-flammable material.
Compression strength: The compression strength perpendicular to the board surface is not less than 40kPa (density ≥100kg/m³); when the density is <100kg/m³, the compression strength is not less than 20kPa. In addition, according to specific application scenarios, such as rock wool boards for roofs, the compressive strength needs to meet higher standards.
Tensile strength: The tensile strength of rock wool boards is not less than 7.5kPa.
Hygroscopicity: The mass moisture absorption rate is not more than 5.0%, and the volume moisture absorption rate is not more than 0.3%.
Water repellency: not less than 98.0%.
IV. Construction and acceptance standards
Material inspection: The variety, specification and performance of rock wool boards and their supporting materials (such as adhesives, plastering mortar, anchors, alkali-resistant glass fiber mesh cloth, etc.) entering the site should meet the design and relevant product quality requirements. Key indicators must be tested and retested after witness sampling, and the product certificate, warranty and inspection materials should be provided.
Base treatment: The surface flatness of the base wall is allowed to deviate by 4mm, and the verticality should be checked with a 2m ruler. The gap between the base of the exterior wall and the ruler shall not be greater than 5mm. The wall should have sufficient strength and adhesion, and the surface should be clean and free of stains.
Bonding requirements: The rock wool board must be firmly bonded to the base wall without looseness or false bonding. The effective bonding area between each rock wool board and the base surface should be no less than 40% (some standards require 30%~50%).
Anchor quality: The number, position, anchor depth and pull-out force of the anchors should meet the design requirements.
Plate seam treatment: The plate seams between the rock wool boards should be uniform and flat, the width should meet the design requirements, and special caulking materials should be used for treatment.
Special part treatment: The insulation structure of special parts such as door and window openings, plinths, and deformation joints should meet the design requirements.
Overall acceptance: The rock wool board insulation system after construction should have a good appearance, without obvious deformation, cracks, leakage and other problems, and the insulation effect should meet the design requirements.