How to choose mineral wool blankets? Turn to Hebei Xinmian Building Materials Co., Ltd.

The core of rock wool batts consists of the internal rock wool and the outer wrapping material. When selecting, please pay close attention to the following points:

1. Core Performance Indicators

• Thermal Conductivity Coefficient:

• This is a critical indicator for measuring thermal insulation performance. The lower the value, the better the insulation effect.

• Typically, the requirement is not more than 0.040 W/(m·K), with high-quality products reaching between 0.035 and 0.038 W/(m·K).

• Inquire with the supplier: "Could you please inform us of the thermal conductivity of the rock wool core material in your rock wool blankets?"

• Bulk Density:

• Weight per cubic meter of rock wool, unit: kg/m³.

• Higher bulk density usually indicates better thermal insulation and mechanical strength, but also a higher price.

• Common range: General applications such as building maintenance and pipe insulation typically range between 60-120 kg/m³. Specific needs may vary depending on your usage scenario (e.g., wind resistance outdoors, pressure-bearing requirements, etc.).

• Inquire with the supplier: "What is the filling weight of this quilt?"

• Thickness:

• Determine based on the required insulation effect and environmental temperature.

• Standard Thickness: 30mm, 50mm, 80mm, 100mm, etc.

• Inquire with suppliers: "Considering our local low winter temperatures (e.g., -10℃), what thickness of product would you recommend to achieve XX℃ of insulation?"

• Fire Rating:

• Rockwool itself is an A-grade non-combustible material. The manufactured rockwool should also meet the A-grade fire resistance standard.

• This is a strict safety criterion that must be confirmed. Suppliers are required to provide relevant inspection reports.

• Water Repellency:

• For outdoor applications (such as concrete winter construction and maintenance, pipe insulation), hydrophobicity is crucial. It signifies the material's resistance to water penetration.

• The water-repellent rate of high-quality rock wool should exceed 98%. Its thermal insulation performance will sharply decline after absorbing water.

2. External Packaging Materials (Fabric)

The outer shell of rock wool blankets determines their durability, sealability, and appearance.

• Glass Fiber Fabric: A common choice, cost-effective, fire-resistant, and corrosion-resistant, but relatively fragile.

• Waterproof Canvas (PVC Coated Fabric): Excellent waterproof properties, high strength, and greater durability, suitable for long-term outdoor use.

• Aluminum Foil Fiberglass Fabric: Featuring a foil surface for reflecting radiant heat, enhancing insulation performance, and providing a neater appearance.

• Fireproof, waterproof, and mildew-resistant fabric: A high-performance option with a higher price point, but boasts a long lifespan.

Select Recommendations: Choose based on budget and usage environment. For long-term outdoor use, we recommend waterproof canvas or three-protection fabric.

3. Craftsmanship and Details

• Sewing Technique: Are the stitches even and tight? Are there any skipped stitches or loose threads? Poor craftsmanship can lead to rock wool leakage during use.

• Edge Treatment: Use strips of the same material or more wear-resistant fabric to wrap the edges to prevent fraying.

• Connection Method (if multiple pieces are used): Does the design include overlapping edges for seamless insulation when multiple blankets are connected?

• Fixed Method: Equipped with straps, Velcro, or ropes for easy attachment to the insulated object.