AST® insulated panel core

A promise of quality

With the development of the AST® quality, the customer is provided with a tool that ensures that the product meets the highest requirements for load-bearing sandwich panels. AST stands for the highest quality standards in terms of strength, durability and fire protection.

The AST® quality ensures high tensile strength, reliable longevity and fire resistance of sandwich panels. Although the essential properties can not be visualized, they are measured and controlled during the manufacturing process.

AST® quality: Strength
AST® quality: Durability
AST® quality: Fire safety
AST® quality control

Sandwich panels are based on interaction between the optimal strength properties. That is why the bonding between the core and the facings is the most critical part in a sandwich panel.

Paroc Panel System masters the sandwich panel technology. In PAROC panels the fully bonded facings together with the lamella orientation and pattern guarantee equal strength properties in each PAROC panels is specially developed to fulfil the high strength demands on the structural bonding between side of the steel sheets has a multiand the reverse side primer system are selected to interact and maximise the strength properties.

The tensile strength of an A4 size piece of PAROC panel is good enough to withstand the load of one Beetle.

Tensile strength of a sandwich panel

To guarantee reliable and uniform strength of a sandwich panel, the tensile strength of the bonding between the face and the core shall always exceed the tensile strength of the core material itself i.e. in the tensile strength test the failure always has to occur in the core. The tensile strength threshold value for AST quality panels is 100 kN/m 2.

Durability in sandwich panels means long-term performance as a structural building component. Cladding products have to maintain their strength and insulating properties, and remain weather resistant over their entire service life. For industrial buildings, a lifetime of 25 years is often sufficient. In other cases, requirements can be 50 years or more. 

PAROC insulated panels use various primer and coating layers of steel sheets to eliminate the potential risk of corrosion inside the panel and ensure the bonding between the adhesive and the steel sheet. To secure colour and gloss retention in the panel surface, PVDF is the standard coating in external use. The adhesive fulfils high durability demands in all environmental conditions during the lifetime of a building. PAROC structural stone wool is water-repellent, non-hygroscopic and non-capillary, meaning no water can penetrate it. In addition, moisture has no effect on the stability of the core and the binder.

AST® quality: Fire safety

Global fire safety protects the lives of people in the buildings as well as fire fighters, prevents losses in terms of damaged buildings, facilities and moveable property as well as interruption of business activities, and protects the environment from hazardous emissions. 

PAROC panels are classified in Euroclass A2-s1,d0 meaning they are impossible to ignite and do not contribute heat to the fire. They are non-combustible (A2) and generate very little smoke and toxic products (s1) and do not form flaming molten droplets (d0). 

The fire resistance of PAROC structures is classified up to EI240 as walls and EI60 as ceilings. PAROC structural stone wool core has good thermal insulation at extreme temperatures and it does not shrink. Shrinkage causes loss of both insulation and integrity. The specially developed adhesive for PAROC panels has high temperature resistance, keeping the core bonded to the unexposed face during a fire. The panel joint in PAROC panels is tight without sealant and extra fixings in the joint, meaning it prevents the penetration of hot gases and flames. 

In case of fire, PAROC panels function as a catenary structure. Therefore, design fire resistant structures with the right detail solutions so that the whole structure meets requirements for stability, insulation and integrity. 

AST® quality control

AST® quality establishes a technical profile for the reliable selection and control of basic raw materials, manufacturing processes and the final product. It makes visible the hidden characteristics that vary between various sandwich panels. 

The quality assurance procedure includes internal testing according to the European product standard EN 14509 for sandwich panels, and third-party control by authorised institutes. 

AST® quality control includes

  • Four-stage quality system: suppliers' quality control, reception control, control of manufacturing quality, and control of finished sandwich panel with full-scale strength tests
  • Third-party quality control for reaction to fire classification by authorised institutes
  • ISO 9001 Quality Certificate

AST® quality is fully implemented in PAROC panels.

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