DLG e.V. - Test: DCC Waterbed

DCC Waterbed Deformability/Elasticity, Permanent Tread Load, Abrasion, Slip resistance

Assessment – Brief Summary

The DCC Waterbed tested here, an elastic floor covering for the resting area in cubicle houses, was investigated with regard to durability and comfort properties on test stands in the DLG-APPROVED test for single value-determining criteria. The deformability and elasticity of the waterbed, the abrasion resistance, the slip resistance were measured and a permanent tread load was applied.

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Table 1: Overview of results

Test characteristic Test result Evaluation*
Deformability and elasticity
– in new condition 15,3 mm + +
– following endurance test 16,6 mm + +
Permanent tread load
no lasting deformation ++
no appreciable wear +
Abrasion test
good wear resistance +
Slip resistance**
good slip resistance on dry and wet mat surface +

*    Evaluation range: ++ / + /◯ / – / –– (◯ = standard)
**    Evaluation range: + / –

The Product

DCC Waterbed

Description and Technical Data:

The black DCC Waterbed tested here is an elastic floor covering made of rubber and is intended for use in the resting area of high cu­bic­les in cubicle houses. Supplied as a roll, this stable floor covering is reinforced with synthetic fabrics; top side and underside: fabric impregnated texture. During the production process, the individual resting area is formed between the two layers of reinforced rubber belting. There are two chambers at each individual resting area (waterbed with 120 cm width: front chamber approx. 483 mm x 1000 mm, rear chamber approx. 965 mm x 1000 mm). Each chamber has one filling hole through which the corresponding volume of water is introduced for each resting area (front chamber approx. 15.2 litre (5 gallons) and rear chamber approx. 30.3 litre (9 gallons)). A stainless steel clamp seals each filling hole for the resting area.

Main dimensions and weight

  • Length:Supplied as sheeting
  • Thickness:approx. 50 mm when filledwith water approx. 9 mm when not filled with water
  • Weight: approx. 10.9 kg/m² when not filled with water

Scroll table to the right to see full display !

Available cubicle width and water fill volume

Cubicle width Water fill volume
Front chamber Rear chamber
110.0 cm approx. 12.30 litre approx. 24.6 litre
112.5 cm approx. 13.25 litre approx. 27.5 litre
115.0 cm approx. 14.20 litre approx. 28.4 litre
120.0 cm approx. 15.20 litre approx. 30.3 litre
125.0 cm approx. 15.20 litre approx. 30.3 litre
130.0 cm approx. 17.00 litre pproxa. 34.0 litre

The Method

Deformability and elasticity

The deformability is measured in new condition and following permanent tread load using ball penetration tests with a calotte (r = 120 mm) and a penetration force of 2,000 N (corresponding to approx. 200 kg).

Permanent tread load

The permanent tread load is measured on a test stand with a round steel foot in the standard test programme with 100,000 alternating loads at 10,000 N (corresponding to approx. 1,000 kg). The steel foot is adapted to the natural conditions as an “artificial cow foot”. The foot has a diameter of 105 mm and therefore a contact area of 75 cm²; the carrying edge of the hoof is simulated by a 5 mm wide ring on the periphery of the sole that projects 1 mm above the rest of the surface.

Abrasion test

In a standardised abrasion test with 10.000 cycles the top cover was grinded with an emery cloth (granulation 280) and a grinding pressure of 500 N (= 8.1 N/cm2 surface pressure). The friction element was cooled continuous with water to prevent an influence of the generated heat during the abrasion test. The size of the grinded area was 61,5 cm².

Slip resistance

The measurements were carried out with the ComfortControl test rig of the DLG test centre. A loaded (10 kg) round plastic foot (105 mm diameter, with a contact area of 70 cm2, 3 mm wide ring at the periphery of the ground) was pulled with a velocity of 20 mm/s across the mat.

The Test Results in Detail

Deformability and elasticity

Figure 2: Deformability as a function of bearing pressure

Figure 3: Permanent tread load

Figure 4: Measuring the deformability

Figure 5: Test sample after abrasion test

Figure 6: Slip resistance measurement

In the ball penetration tests in new condition with a calotte (r = 120 mm), penetration depth was 15.3 mm. The resulting calculated bearing pressure of 17.3 N/cm² in­dicates a small load on the carpal joints when lying down and getting up. Elasticity was measured following a permanent tread load exerted by a steel foot (contact area: 75 cm²) with 100,000 alternating loads at 10,000 N. Following the endurance test, the penetration depth of the calotte increased from 15.3 mm to 16.6 mm. The bearing pressure decreased from 17.3 N/cm² to 16.0 N/cm² (see Fig. 2). This means that deformability and elasticity slightly increase.
Evaluation see Table 1.

Permanent tread load

No appreciable wear was observed on the waterbed following exposure to permanent tread load on a test stand with 100,000 alternating loads at 10,000 N. No lasting deformation was observed. Evaluation see Table 1.

Abrasion test

The abrasion depth after 10,000 cycles amounted to 1.0 mm, this corresponds to approximately 22 % of the rubber thickness. Of the ground surface 3.5 grams were rubbed off. Evaluation see Table 1.

Slip Resistance

The slide pulling tests showed a good slip resistance on the dry or wet rubber mat surface in new condition. The measured friction coefficients (μ) all surpassed the minimal value of μ = 0.45 which speaks for a good foothold. Evaluation see Table 1.

Summary

Based on test-stand investigations, the criteria tested in this DLG-APPROVED test for single value-determining criteria evaluate the comfort and durability properties of the DCC Waterbed for use in the resting area of high cubicles in cubicle houses. The tested DCC Waterbed met the requirements of the Testing Framework with respect to the investigated criteria.

DLG Test Center Technology and Farm Inputs

DLG e.V.
Max-Eyth-Weg 1
64823 Groß-Umstadt
Germany
Tel.: +49(0)69 24 788-611
tech(at)DLG.org

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A quality mark “DLG-APPROVED for single value-determining criteria” is awarded to agricultural products which successfully passed a smaller-scope DLG usability test according to independent and recognized evaluation criteria. The test intends to highlight special innovations and key criteria of the test item. The test can focus on criteria from the DLG testing framework for full tests or on other individual features or qualitative criteria. The minimum requirements, the test conditions and procedures as well as the evaluation guidelines of the test results are determined in consultation with a DLG expert group. They comply with the generally recognized technology rules as well as with scientific and agricultural knowledge and requirements. The successful test concludes with the publishing of a test report and the awarding
of a quality mark which is valid for five years following the award date.

The DLG-APPROVED test for single value-determining criteria “Deformability/Elasticity, Permanent Tread Load, Abrasion, Slip resistance” includes technical measurements on test stands of the DLG Test Center. The deformability and elasticity, the abrasion resistance, the slip resistance were measured and a permanent tread load was applied. The test was based on the DLG Testing Framework for elastic stable flooring, as of April 2010. Other criteria were not investigated.

Manufacturer and Applicant

Advanced Comfort Technology Inc., 752 Lois Drive,
Sun Prairie, WI 53590

Contact:
Telephone: 00 608 709 2693
Fax: 00 608 709 2615
info(at)advancedcomforttechnology.com
www.dccwaterbeds.com

Test execution

DLG e.V.,
Test Center
Technology and Farm Inputs,
Max-Eyth-Weg 1,
64823 Groß-Umstadt
Germany

DLG Testing Framework
DLG-APPROVED test for single value-determining
criteria “Elastic Stable Flooring” (as at 04/2010)

Field
Indoor operations

Project manager
Dipl.-Ing. Susanne Gäckler

Test engineer(s)
Dr. Harald Reubold  *

* Reporting engineer