Mercedes-Benz DBL 8230 Self-Adhesive Labels

Self-adhesive labels, as defined in the standard "Mercedes-Benz DBL 8230 Self-adhesive labels" developed by the automobile company Daimler-Benz, are used as identification plates and information labels that provide information for the customer, authorized persons and service organization. The relevant product versions are listed in the table "Overview of current product versions" as follows:

• .30 Polypropylene film, acrylate adhesive: Information labels - Outdoor
• .40 Polypropylene film, acrylate adhesive: Information labels - Indoor
• .50 Polypropylene film, acrylate adhesive: Information labels - Laser labels
• .60 Polypropylene film, acrylate adhesive: Airbag warning labels - Adhesive labels
• .61 Polypropylene film, acrylate adhesive: Airbag warning labels - Adhesive labels (delamination)
• .62 Polyurethane film: Airbag warning labels - Heat transfer labels
• .63 Polypropylene film, acrylate adhesive: Airbag warning labels – “Advanced airbag USA”

The general requirements in this standard are given as follows:

• In order to ensure product safety and product quality and to meet certification requirements, all relevant legal regulations and laws must be complied with. The relevant requirements of the Daimler Group also apply.
• All materials, process engineering, component parts and systems must comply with all applicable legal requirements regarding components and recyclability.
• “DBL 8585 General regulations environmental protection, hazardous substances, hazardous goods, negative substance list” standard for material selection must be followed.
• The selection of (film) adhesives and bonding methods must be made with attention to bonding and technical requirements, occupational safety requirements and environmental aspects (in addition, standards DBL 8585, DBL 6714, DBL 6565 and DBL 5430 must be observed).
• Labels must not have manufacturing defects or faulty adhesive coating.
• Labels must adhere well to the original surfaces and provide good, permanent adhesion. The backing must be easily removable when labels are used.
• When used on inorganic or organic glass (e.g. Plexiglas), the adhesive must not leave residue that cannot be removed or cause clouding of the glass.
• The DBL 8585 standard applies to environmental protection and occupational safety guidelines.

Technical requirements, including resistance to chemical attack, are included in the tables titled “Technical requirements for data labels” and “Additional resistance to chemical attack” provided within the standard.

When performing the adhesion strength test (determination of peel resistance), test strips of at least 25 mm wide and at least 175 mm long should be cut from the data labels. Before testing, the test strips and sample material should be conditioned for at least 4 hours at a temperature of 23 degrees plus/minus 2 degrees and a relative humidity of 50 percent plus/minus 5 percent. The test strips are approximately bonded to the material sample. There is a 30 mm (unbonded) protrusion for clamping in the testing machine. After the test strip is applied without bubbles, a 2 kg roller should be rolled twice in both directions over the strip to be bonded at a speed of approximately 10 mm/s.

To determine the peel strength at a 90° angle (Appendix B of DIN EN ISO 29862), measurements should be taken 24 hours after application of the test strips (average value of 3 separate measurements in each case). For this purpose, the test piece should be placed in a roller peeling device. The design part of the test strip should be placed between the rollers and the lower platen of the tensile testing machine. Peeling should be carried out at a travel speed of 300 mm/min. When evaluating the peel strength, the first load peak (initial tear force) should not be taken into account. The peel strength is expressed in N/cm and is calculated from the peel force and the specimen width.

After aging and subsequent conditioning in a standard atmosphere (in accordance with DIN EN ISO 24) for 291 hours, the shrinkage measurement is carried out using a calliper to measure the length and width (longitudinal and transverse) of the information labels and calculate the shrinkage allowance compared to the original condition. The edges must also be assessed with the naked eye.

The chemical resistance test (Stein method) is performed to determine the resistance of the surface of an information label to the effects of chemicals within 24 hours. For this purpose, information labels should be attached to clean test plates and rolled twice in both directions at a speed of approximately 2 mm/sec using a 10 kg roller. The relevant chemicals in the table given in the standard should be applied to horizontally positioned test plates and contact with the edges of the plates should be avoided. Then, they should be kept at 23 degrees for 24 hours. In case of volatile chemicals, storage should be done in closed containers.

After the test period is completed, the information labels should be cleaned with detergent water to remove chemicals and dried using absorbent paper or cloth. If chemical residues remain on the surface, the cleaning should be repeated with an inert solvent such as cleaning fluid. Immediately afterwards, the change in color or printed image is evaluated in accordance with the table.

Our organization, which has been trying to support businesses from every sector with its testing, measurement, analysis and evaluation studies carried out in a wide range for years, has a strong staff that closely follows the developments in the world in the field of science and technology and constantly improves itself. In this context, testing services in accordance with the "Mercedes-Benz DBL 8230 Self-adhesive labels" standard are also provided to businesses.