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Rubber mats GH-S 2.1/2.4/2.7, GH 2.1 24 mm, GH 2.4/2.6 18 mm/24 mm, GH 2.7 24 mm

DLG-APPROVED: "PAK Test"

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The Approval

The DLG quality marks and seals stand for independent tests and certifications of products, systems and processes (such as manufacturing processes) that are based on requirements that are drawn from the field. The test criteria are laid down by independent test commissions that are made up by volunteer experts. These criteria describe the methods of testing the essential and value determining features of products or processes. The speci­fications that define a specific quality of a product or process are drawn from the field and are in line with the latest scientific findings. The quality mark is awarded to a product or process after the test has revealed that it complies with the high DLG standards. Depending on the type of test and product group, the mark is either awarded under the RAL quality assurance scheme or as DLG quality mark under the DLG quality standards scheme. The DLG tests provide consumers with valuable purchase information and at the same time ensure that the quality of the tested product is maintained at a consistently high level. By submitting their products to a DLG test, manufacturers agree to accept an ongoing and independent quality monitoring programme for the products, systems and processes tested. This programme is subsequently carried out by qualified samplers and auditors who on an ongoing basis take unannounced samples at the manufacturer’s or dealer’s premises for subsequent analysis or carry out audit processes.

This DLG quality mark test involved measuring PAH migration to Tenax in all rubber blends. The test was based on the ‘Project report on PAH migration from rubber floor mats’ as provided by Fraunhofer-Institut für Verfahrenstechnik und Verpackung IVV, Freising, Germany, dated 8 August 2018 and DIN 3763:2022-08 (Resilient barn floor coverings in the walking and lying area of cattle and dairy cows – Requirements and testing) and DIN 3762:2022-07 (Barn floor coverings – Determination of the migration of polycyclic aromatic hydrocarbons (PAHs)).

Overview

Table: Overview of results

DLG Quality profileRequirementsEvaluation*
PAH migration to Tenax    ≤ 10 μg/dm²    (15+1 EU SCF-PAK)
    ≤ 5 μg/dm²    (8 EU REACH-PAK)

The rubber mats GH-S 2.1 / 2.4 / 2.7, GH 2.1 24 mm, GH 2.4 / 2.6 18 mm / 24 mm and GH 2.7 24 mm complies 
with the migration guideline values specified in DIN 3763:2022-08 for the PAHs determined in accordance with DIN 3762:2022-07.

* Evaluation range: requirements fulfilled () / requirements not fulfilled () 

The Product

Description and Technical Data

The rubber mats tested GH-S 2.1 / 2.4 / 2.7, GH 2.1 24 mm, GH 2.4 / 2.6 18 mm / 24 mm and GH 2.7 24 mm are supplied with the same mixture/the same components and the same technology.

Product nameTypeThicknessUsage
GH-S 2.1 / 2.4 / 2.7slat rubber24 mmcorridors
milking parlour
waiting area
carusels
pens
GH 2.1walking way cover24 mm
GH 2.4walking way cover18 mm and 24 mm
GH 2.6walking way cover18 mm and 24 mm
GH 2.7walking way cover24 mm

Figures 2 to 6:   slat rubber GH-S 2.1 / 2.4 / 2.7  walking way cover GH 2.1, walking way cover GH 2.4, walking way cover GH 2.6, walking way cover GH 2.7

The Method

PAH migration to Tenax

PAH migration testing was carried out by taking samples from rubber mats GH-S 2.1 / 2.4 / 2.7, GH 2.1 24 mm, GH 2.4 / 2.6 18 mm / 24 mm and GH 2.7 24 mm. The testing was carried out to the standard EN 1186-13-b:2002-12 (accredited), modified for DIN 3762:2022-07.

Parameters

  • Simulating a modified Polyphe­nylene Oxide (MPPO, Tenax)
  • Contact time: 10 days 
  • Temperature: 40 °C
  • Contact surface: 0.5 dm² 
  • Quantity: 2 g Tenax

The tests involved cutting a 0.5 dm² patch from the sample and applying  2 g of Tenax powder on it (one-sided contact layer). The weight of each  patch was obtained by weighing it on analysis scales. At the end of the contact time, the migrating contact was terminated by removing the Tenax powder from the samples. Then the Tenax was extracted at 40 °C during 24 hours with n-Hexane by adding an isotope-marked PAH standard blend (internal standard) and the n-Hexane extracts were cleaned before the GS-MS measurement was taken using SPE. The test was carried out by applying duplicate measurements.

Summary

PAH migration from the rubber mats GH-S 2.1 / 2.4 / 2.7, GH 2.1 24 mm, GH 2.4 / 2.6 18 mm / 24 mm and 
GH 2.7 24 mm to Tenax powder was tested. The rubber mats comply with the migration guideline values specified in DIN 3763:2022-08 for the PAHs determined in accordance with DIN 3762:2022-07.

Applicant and Test implementation

Manufacturer and contact information

Manufacturer and Applicant
Geyer & Hosaja Sp. z o.o.
Partynia 12
39-310 Radomysl Wielki
Polen

Contact:
Te l.: 0048 14 680 6700
sebastian.saj@geyer-hosaja.com.pl
https://www.geyer-hosaja.com.pl/

 

Test implementation

DLG TestService GmbH, Gross-Umstadt location
The tests are conducted on behalf of DLG e.V.

DLG test scope
Quality mark test ‘Project report on PAH migration from rubber floor mats’ provided by Fraunhofer-
Institut für Verfahrenstechnik und Verpackung IVV, Freising, Germany 

DIN 3763:2022-08 (Resilient barn flooring in the walking and lying area of cattle and dairy cows – 
Requirements and testing) and DIN 3762:2022-07 (Barn flooring – Determination of migration of poly­cyclic aromatic hydrocarbons (PAHs))

Department
Agriculture

Head of Department
Dr. Michael Eise

Test engineer(s)
Dr. Harald Reubold *

* Author

Special examination
Fraunhofer-Institut Verfahrenstechnik 
und Verpackung, Giggenhauser Straße 35, 
D-85354 Freising, Germany

Contact

DLG TestService GmbH - Groß-Umstadt location • Max-Eyth-Weg 1 64823 Groß-Umstadt Germany • Tel.: +49(0)69 24 788-611 • tech@DLG.org