DD ISO-PAS 11856:2003 pdf download Textile floor coverings — Test methods for the determination of fibre bind
Scope
This Publicly Available Specification describes the following six methods for determining fibre bind of textilefloor coverings. Each test method states the type(s) of textile floor coverings for which the test is applicable.
a) Lisson Tretrad test:
Method A for mass loss for synthetic cut pile carpets;Method B for appearance change of synthetic loop pile carpets.
b) Modified Martindale machine test for mass loss/appearance change
dHexapod tumbler test for mass loss.
d)Japanese fibre bind test,
e) Usometer test for fuzzing and pilling of loop pile carpets.
f)Fiberlock tester test for fuzzing and pilling of loop pile carpets
2Normative references
The following referenced documents are indispensable for the application of this document. For datedreferences, only the edition cited applies. For undated references, the latest edition of the referenceddocument (including any amendments) applies.
ISO 139, Textiles — Sfandard atmospheres for conditioning and testing
ISO 1765, Machine-made textile floor coverings — Determmination of thickness
ISO 1957, Machine-made textile floor coverings – Selection and cuting of specimens for physical tests
ISO 2424, Textile floor coverings – Vocabulary
ISO 8543, Textile floor coverings — Methods for determination of mass
ISO 9405, Textile floor coverings – Assessment of changes in appearance
ISO 10361, Textile floor coverings Production of changes in appearance by means of Vettermann drumand hexapod tumbler testers
Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 2424 and the following apply.
3.1mass loss per unit area
difference between the sample mass before and after the wear test, related to the area subjected to wear
3.2relative mass loss
型nratio of mass loss per unit area, y, to the mass per unit area of the use surface
3.3
fibre bind
protrusion of fibres above the normal level after mechanical action, assessed using photographic standards
3.4
filament damagewhere filaments that have been dislodged or broken away from the tuft loop or the binding site result in a fuzzyor hairy appearance of the loop surface of a pile yarn floor covering
4Lisson Tretrad tests
4.1 Principle
The specimens of a textile floor covering are exposed at constant load and slippage and for a prescribednumber of treads to the action of a four-footed wheel (Tretrad). The feet are fitted with interchangeable rubbersoles
4.2 Apparatus
4.2.1 Test apparatus
The Tretrad testing machine’) comprises a bedplate, the front edge of which is rounded with a 10 mm radiusto simulate a stair edge. The faces of the bedplate shall be parallel to the track traversed by the Tretrad feet,
The wear surface is formed by the width of the Tretrad feet and the length of the track over which the Tretradruns. The track shall be determined for each machine by measuring the distance between the front edge otthe bedplate and the perpendicular projection of the Tretrad axis at its furthermost point of reversal. Thelength of the track shall be on average (800 : 20) mm.
The Tretrad is mounted in a frame that is able to rotate around an axis. The distance of this axis of rotationfrom the upper surface of the bedplate shall be 135 mm to 140 mm. The Tretrad comprising 4 legs with rigidlyattached feet performs linear to-and-fro traverses over the bedplate. At the points of reversal, it remainsstationary for about 1 s.
At the front edge of the bedplate, the Tretrad runs beyond the bed and is held there by a height-adjustablestopper in such a way that the lower edge of the foot (without sole material) at the perpendicular position otthe Tretrad leg can be adjusted between – 5 mm below and + 5 mm above the level of the surface of the

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