DAF KEUR 00822-102 Determination of Mass Per Unit Area (Gramage) for Coating Materials - Possible Layer-Specific or Variant Method

The “DAF KEUR 00822-102 Determination of mass per unit area (grammage) for coating materials - Possible layer-specific or variant method” 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, is frequently used as a supplementary or special method for the following purposes:

• Layer-specific grammage (e.g., separating and weighing individual components such as surface fabric, foam padding, or backing/cover in multilayer laminates)
• Alternative calculation or verification procedures when composites need to be disassembled
• Precise control is ensured in production where total weight and component weight have different levels of importance.

However, the DAF KEUR 00822-101 standard generally covers the total mass per unit area of ​​the bonded coating materials. This distinction helps suppliers and DAF engineers verify homogeneity between layers, identify process inconsistencies (e.g., uneven foaming or coating), and ensure compliance with precise specifications in drawings.

Typical applications of the DAF KEUR 00822-102 standard include:

• Laminated upholstery (fabric + foam + tulle)
• Adhesive textile door trim panels
• Ceiling panel composites
• Any type of multilayer coating that affects performance, adhesion, or durability.

In general, the following steps are followed when administering the test:

• Samples are conditioned (e.g., at 23 degrees Celsius and 50 percent relative humidity).
• The layers are physically separated (mechanical separation, solvent if necessary, or according to a defined protocol), defined areas are cut, and each is precisely weighed.
• If necessary, the weight and total are calculated separately for each layer.
• High-precision scales and templates ensure accuracy; tolerances are strict according to DAF specifications.

The DAF KEUR 00822-106 standard is often used, for example, to determine the relationship between mass and adhesion quality, either before or after adhesion tests.

The relevant standards in the DAF KEUR 00822 standard series are as follows:

• KEUR 00822-101 Basic / total mass determination (including § 6.1.3.1 fabric and § 6.1.3.2 foam variants)
• KEUR 00822-104: Determination of tear strength.
• KEUR 00822-106: Adhesion (resistance to layer separation)
• KEUR 00822-107: Color fastness to light.
• KEUR 00822-108: Color fastness to friction.
• KEUR 00822-115: Resistance to aging
• KEUR 00822-116: Resistance to wear and tear.
• KEUR 00822-120: Condensation behavior
• KEUR 00822-122: Sensitivity to electrostatic charges

In truck cabin design,

• Weight accuracy is vital for fuel efficiency, emissions, and payload capacity; layer-specific grammage prevents hidden excess weight resulting from irregular production.
• Quality and consistency: Variations in the mass of foam or fabric layers indicate defects that can lead to separation, poor comfort, or premature wear.
• Performance link: Accurate per-layer data predicts durability, sound absorption, seating support, and compliance with other KEUR tests.
• Supplier control: Ensures global consistency in multi-layer materials for DAF's high-volume, long-lasting truck interiors.

The DAF KEUR 00822-102 standard thus represents a critical improvement within the weight range, enabling detailed validation of composite cladding materials to support DAF's goals of lightweight, durable, and comfortable truck cabs.

Essentially, the DAF KEUR 00822-102 standard is a fundamental test ensuring that cladding materials meet DAF's rigorous requirements for weight, homogeneity, and integration into robust, driver-focused truck cabs. This standard mandates the precise measurement of mass per unit area for cladding materials used in truck interiors. These include upholstery fabrics, artificial leather, laminated textiles, foam-backed composites, seat covers, door trim fabrics, headliners, and other textile or clad layers used in DAF truck cabs.

This standard is considered very important in the heavy-duty truck industry for the following reasons:

• Vehicle weight optimization and fuel efficiency/load capacity: Heavy-duty trucks operate under strict gross vehicle weight limits and aim to maximize load capacity. Every kilogram saved in the cab contributes to:
• Improved fuel economy (critical for long-haul operators facing high diesel costs)
• Higher permitted cargo or passenger load
• Reduced carbon dioxide emissions and compliance with environmental regulations.

Floor coverings cover large surface areas (seats, walls, ceilings, doors). Even small variations in weight between production batches can lead to significant extra weight.

• Material consistency and production quality control: Grammage is a key indicator of homogeneity in textile/composite production.
• Uneven coating thickness, inconsistent foam density, or variable yarn/fabric weight create defects that affect appearance, feel, and performance.
• Suppliers must meet tight tolerances (typically plus/minus 5-10 percent or tighter) to pass DAF approval.

Without this standardized measurement, variations go unnoticed, leading to rejected batches, production delays, or field failures (e.g., sagging headliners or uneven seat padding).

• Performance correlation with other key characteristics: Mass per unit area directly affects and is affected by many functional requirements tested in the same DAF KEUR 00822 series.
• Durability: Higher grammage generally improves abrasion resistance, tear strength (DAF KEUR 00822-104), and service life (DAF KEUR 00822-116).
• Comfort and acoustics: Heavier/layered materials provide better sound insulation and seating support in noisy truck cabs.
• Thermal and insulation: Affects heat retention or distribution in extreme climates.
• Cost and design balance: Excessive weight means high costs, while being too light may result in insufficient strength or comfort.

Grammar testing serves as a baseline for reliably associating and detecting these behaviors.

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 00822-102 standard.