Brief Description:Vertical-fibre rock wool strip is a high-performance fireproof core for colour steel sandwich panels. It features high compression resistance, zero settlement and low fibre shedding for stable panel lamination. Standard 60/100/140kg/m³ densities and custom sizes available, ideal for industrial buildings and cleanroom insulation.

Haochen colour-coated steel rock wool strips, also known as vertical-fibre rock wool belts, are custom-developed core materials dedicated to colour-coated steel sandwich panel production lines. Manufactured from natural ores such as basalt and diabase, the material undergoes high-temperature melting, centrifugal fibreising and curing. A turning and cutting process aligns rock wool fibres vertically to the panel surface, forming strip-shaped rock wool products with high tensile strength, superior compression resistance and anti-settlement performance. This product is a compliant, durable Class A fire-resistant filler for roof and wall sandwich panels in steel-framed factory buildings.

2. Manufacturing Process & Structural Features

The key distinction between vertical rock wool strips and conventional horizontal-fibre rock wool boards lies in its turned vertical-fibre structure: fibres stand upright, with load-bearing orientation aligned to roof loads. The product is fully cured and cut as an integral piece, free of loose fibres, fragments and fibre shedding. Uniform dimensional accuracy enables perfect compatibility with fully automatic continuous lamination lines for colour-coated steel sandwich panels. Stable feeding delivers flat composite panels, eliminating defects such as bulging and indentation.

3. Core Performance Benefits (Tailored for Sandwich Panel Industry)

1. High vertical compressive strength; no compression or settlement under long-term roof loadingThe vertical-fibre structure delivers outstanding compression and creep resistance, less prone to thinning under load compared with traditional horizontal-fibre rock wool boards. Under sustained loads including snow accumulation, maintenance foot traffic and self-weight, panel thickness remains unchanged and thermal performance stays consistent. It fundamentally resolves common industry issues such as sagging, hollowing and surface deformation of aged sandwich panels.

2. Class A1 Non-combustible, meeting factory fire acceptance requirementsMade of purely inorganic mineral materials, it is Euroclass A1 non-combustible, low-smoke, drip-free and releases no toxic fumes during combustion, offering excellent fire stability. Suitable for Class A & B factories, warehouses, fire compartment walls and roof fire insulation. It passes fire tests and random on-site inspections.

3. Excellent bonding performance, flat panels free of blisteringRock wool strips feature uniform hardness, dense structure and smooth surfaces. They bond firmly to colour-coated steel sheets with polyurethane adhesives without delamination or debonding. Finished sandwich panels achieve high flatness and premium appearance for high-spec engineering projects.

4. Long-term stable thermal insulationDense, evenly arranged fibres deliver low thermal conductivity and good panel tightness, minimising thermal bridging gaps and effectively blocking heat transfer. This maintains steady indoor temperatures within buildings and delivers reliable long-term energy-saving performance.

5. Hydrophobic, ageing-resistant and non-pulverisingFull hydrophobic treatment is available, achieving a water repellency rate ≥98%. Panels will not sag, clump or decay upon moisture exposure, suited for long-term use in humid workshops, coastal zones and high-precipitation regions.

6. High dimensional accuracy, excellent production line compatibilityModular strip production creates minimal joints. After lamination, panels exhibit strong structural integrity, greatly improving the overall mechanical strength and fire integrity of sandwich panels.

4. Application Scope

Engineered specifically as core infill for colour-coated steel sandwich panels:

1. Rock wool sandwich panels for roofs of steel-framed factories

2. Fire-resistant thermal insulation sandwich panels for external factory walls

3. Internal fire partition panels for workshops

4. Ceilings and wall panels for cleanrooms

5. Fire-resistant prefab cabin panels for construction sites

6. All types of Euroclass A1 fire-rated prefabricated building envelope sandwich panels

5. Product Selection Guidance

• Temporary construction & internal wall panels: 60kg/m³ vertical rock wool strips

• General external walls & roofs of standard factories: 100kg/m³ vertical rock wool strips

• Heavy-load, cold-climate and high-end projects: 140kg/m³ high-density vertical rock wool strips

6. Manufacturer Advantages

Haochen Insulation specialises in vertical-fibre rock wool strips for colour-coated steel sandwich panels, with integrated in-house production and sales. Our products feature guaranteed density, high rigidity, anti-sag properties and minimal fibre loss, compatible with automated production lines of major sandwich panel manufacturers. Bulk lorry deliveries and custom sizes are available. Consistent product quality ensures smooth project acceptance.