DAF KEUR 00822-106 Coating Materials - Adhesion Determination

The “DAF KEUR 00822-106 Coating materials - Determination of adhesion” standard, developed as part of the official approval or certification process for parts, materials, or processes used in trucks manufactured by DAF, a Dutch truck manufacturer, describes a procedure for evaluating the adhesion strength between layers in multi-layer coating materials. This procedure primarily tests the adhesion between a textile/fabric surface and a foam backing layer or laminated layers. It ensures the material does not detach under mechanical stress, repeated bending, cleaning, or prolonged use in the demanding environment of a heavy-duty truck cab.

This standard is specifically devoted to adhesion testing (peeling strength or separation force testing). This test method is a peel test (typically a 180-degree peel or T-peel configuration depending on the exact procedure). This method generally follows these steps:

• A test sample is prepared (usually a strip of laminated material). Standardized sections of the material with bonded layers are removed (e.g., fabric to foam, coating to base fabric).
• To create the starting tabs, the layers are partially separated at one end.
• One layer is clamped to a fixed handle, and the other layer to a movable handle of the tensile testing machine.
• A constant rate of force is applied to spread the separation (peeling) along the connection line.
• The average peel force and failure mode (e.g., adhesive failure, foam cohesion failure, fabric tearing) are recorded.
• The characteristics of the maximum force and the force curve at the moment of separation are recorded. Higher values ​​indicate stronger adhesion.

This standard ensures that test results are consistent and comparable among laboratories and suppliers by specifying test speed, compression conditions, medium, and reporting format.

Requirements typically include minimum strength values ​​(specific thresholds are defined in the material approval or in the relevant DAF KEUR material specification referring to this test method).

This standard is conceptually similar to the following widely used standards:

• DIN 53357 Testing of plastic sheets - Adhesion test
• DIN 54310 Textile tests; separation of bondable interlayers from top fabrics, mechanical separation test.
• ISO 4578 Adhesives - Determination of peel resistance of high-strength adhesive bonds - Floating roller method
• ASTM D903 Standard test method for peel or separation strength of adhesive bonds.

However, the DAF KEUR 00822-106 standard has been adapted to DAF's specific acceptance criteria for truck interior durability, climate exposure, and service life expectations (typically 10-15 years).

The DAF KEUR 00822 standard series of tests ensures that interior materials exhibit abrasion resistance, maintain their appearance, and adhere securely under vibration, temperature variations, UV exposure, and frequent use.

Adhesion failures in truck seat covers, door panels, or headliners can lead to aesthetic defects, reduced comfort, safety concerns (e.g., loose material obstructing controls), or increased cleaning and maintenance costs. Companies supplying DAF must demonstrate compliance with the DAF KEUR 00822-106 standard during material qualification, typically as part of the production approval process.

In short, the DAF KEUR 00822-106 standard defines how to measure the adhesion strength between layers or components of a coating material. Coating materials include textiles, foams, or composites used for:

• Seats and upholstery
• Interior trim panels
• Door coverings
• Instrument panel and other interior surfaces

Adhesion testing essentially measures the force required to separate bonded layers or remove coatings under controlled conditions. Strong adhesion ensures that materials do not peel or separate over their lifespan, which is a crucial aspect of interior durability and perceived quality in heavy-duty vehicles.

Adhesion is considered very important in truck interiors. In commercial vehicles such as DAF trucks, interior materials must withstand:

• Thermal cycling (heat and cold during use and parking)
• Mechanical stress (vibration and loading)
• Wear and tear caused by operators (seat movement, contact)

Poor adhesion between layers can lead to:

• Peeling or separation of fabrics and foams
• Rough edges or wrinkles in coatings
• Decreased aesthetic and functional durability.

The DAF KEUR 00822-106 standard defines a clear test procedure, ensuring that materials meet predefined adhesion performance criteria, minimizing failures during service, and maintaining high indoor quality.

The DAF KEUR 00822-106 standard deals with coating materials and their properties. Other relevant standards in the series include:

• Mass and layer properties (e.g., DAF KEUR 00822-101 standard)
• Tensile strength and elongation (e.g., DAF KEUR 00822-102 standard)
• Tear resistance (e.g., DAF KEUR 00822-104 standard)
• Color fastness to light or friction (e.g., DAF KEUR 00822-107 and DAF KEUR 00822-108 standards)

Together, these features provide a comprehensive framework for evaluating the physical and performance characteristics of interior coatings.

In short, the DAF KEUR 00822-106 standard is a specific material testing standard used to measure the adhesion strength of coating materials, meaning it measures how well layers within interior textiles and bonded components resist separation. This helps ensure interior quality, durability, and long-term performance in demanding commercial vehicle environments.

For many years, our organization, with its competent and experienced staff, has been understanding the needs of its customers, providing the advanced testing services they require, and assisting them in the establishment, implementation, and improvement of management systems. Within this framework, we also provide testing services to businesses in accordance with the DAF KEUR 00822-106 standard.