DAF KEUR 00822-113 Coating Materials - Determination of Shrinkage Caused by Moisture

The “DAF KEUR 00822-113 Coating materials - Determination of shrinkage due to moisture” 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 measuring how much a material used in the interior of DAF vehicles (e.g., upholstery, textiles, lining, or coating material) shrinks when exposed to moisture.

Size changes due to humidity are important because:

• Shrinkage can affect fit and appearance: Materials that shrink too much can bend or separate from surfaces in vehicle cabins.
• It affects durability and aesthetics: Excessive shrinkage can lead to cracks, gaps, or misalignment problems around seams and edges.
• Interior component performance: If materials are not stable, passenger comfort and long-term durability can be compromised.

The DAF KEUR 00822-113 standard establishes a controlled method for determining how moisture alters the dimensions (measurements) of specific coating materials. This is crucial for internal parts that are regularly exposed to moisture, cleaning fluids, human contact, and temperature changes over time.

This standard belongs to the DAF KEUR 00822 family of standards, which focuses on the color fastness, durability, and dimensional properties of textiles, leather, synthetic coatings, upholstery, and trim materials used in truck interiors.

Truck cab materials (such as seat fabrics, door panels, and headliners) are exposed to high levels of moisture during long-haul operations or in changing climates, caused by drivers' sweat, wet clothing, cleaning agents, and environmental conditions. Excessive shrinkage due to moisture can lead to:

• Wrinkling or deformation in the upholstery
• Gaps or puckering at seams and edges
• Decrease in harmony and aesthetic quality over time.
• Potential functional problems (e.g., interference with mechanisms)

This test verifies that materials remain dimensionally stable when wetted or exposed to humid conditions, helping suppliers meet DAF's stringent requirements for long-term reliability and customer satisfaction in commercial trucks.

This testing method is compatible with ISO 3759 and ISO 7771 standards, which are common textile/furniture material standards for moisture-induced dimensional change, or with adapted AATCC methods for shrinkage. This method generally follows these steps:

Conditioning of test samples under standard atmospheric conditions.

• Precise measurement of the initial dimensions (length and width).
• Samples are exposed to controlled humidity (e.g., immersion in water, a high-humidity room, or wetting followed by drying).
• Post-exposure reconditioning and remeasurement.
• Calculation of percentage contraction (negative change) or expansion in both directions.

Acceptance criteria typically specify the maximum allowable shrinkage (often stricter for critical applications).

This method is primarily applied to flat coating materials such as woven/knitted fabrics, coated textiles, artificial leather, and similar products found in truck cabins.

The relevant DAF KEUR 00822 standards are as follows:

• DAF KEUR 00822-107 Color fastness to light (color stability under light exposure)
• DAF KEUR 00822-108 Friction fastness (resistance to abrasion caused by friction)
• DAF KEUR 00822-113 Shrinkage due to moisture.
• DAF KEUR 00822-115 Resistance to aging
• DAF KEUR 00822-116 Wear resistance (wear test, usually Taber method)
• DAF KEUR 00822-120 Condensation behavior (condensable emissions)
• DAF KEUR 00822-122 Sensitivity to electrostatic charges

This grouping demonstrates that the DAF KEUR 00822-113 standard is part of a broader focus on material performance, durability, and user experience, particularly for interior surfaces and coatings.

Heavy-duty vehicles, such as those manufactured by DAF, operate in a variety of environments: coastal humidity, rain, snow, and heavy washes. Fabric and vinyl shrinkage due to humidity can cause:

• You can change the surface geometry.
• It can affect the adhesion of glued parts.
• It can create voids that trap dirt or moisture.
• It can shorten the lifespan of the interior panels.

By establishing a specific testing methodology, manufacturers and suppliers ensure that materials meet a consistent performance benchmark before being approved for use in DAF vehicles.

Typically, DAF's design engineers and quality control teams refer to these standards in the following situations:

• When approving new suppliers
• Verifying incoming batches of interior trim materials
• When performing durability and environmental simulations
• When certifying materials for mass production

This standard is deemed necessary for the following reasons:

• Excessive environmental exposure from trucking
• Preventing dimensional instability and appearance problems.
• Ensuring long-term durability and customer satisfaction.
• Assembly and production precision
• Alignment with broader industry needs.

DAF rigorously tests for moisture-induced shrinkage, ensuring that its interior materials remain stable, durable, and visually appealing throughout years of intensive use.

In short, the DAF KEUR 00822-113 standard is a proprietary DAF test standard. It measures moisture-induced shrinkage in coating materials used in truck interiors. This test ensures material quality, durability, and conformability in real-world conditions where moisture exposure is common.

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 00822-113 standard.