BS ISO 1763:2020 pdf download.Textile floor coverings — Determination of number of tufts and/or loops per unit length and per unit area.
1 Scope
This document specifies a method for the determination of the number of tufts and/or loops per unit length and per unit area of a textile floor covering. It is applicable to textile floor coverings with the pile of which consists of tufts and/or loops.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 1957, Machine-made textile floor coverings — Selection and cutting of specimens for physical tests
ISO 2424, Textile floor coverings — Vocabulary
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 2424 and the following apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https://www.iso.org/obp
— IEC Electropedia: available at http://www.electropedia.org/
3.1
tuft
J-shaped, U-shaped or W-shaped length of yarn, or length of yarn in the form of a knot, of which the leg or legs form the pile of a carpet
Note 1 to entry: See Figure 1 and Figure 2 for examples.
7 Test specimens Select four areas representative of the sample, such that each edge contains at least 41 tufts and/or loops and is not less than 100 mm in length. Avoid selecting any area within 100 mm of any boundary of the sample. For machine-made products, follow the procedure in ISO 1957. Ensure that the specimens are marked clearly in the directions parallel to and at right angles to the selvedge.
8 Procedure Measure the distance (with the ruler) between (the middle of tufts/loops numbers 0 and 1) and (the middle of the tufts/loops numbers 41 and 42) and count 41 tufts and/or loops (See Figure 4).
If the distance covered by 41 tufts/loops is less than 100 mm, continue to count until the number of complete tufts and/or loops extends over at least 100 mm. Where two or more pile yarns lie side by side but are not twisted together, count them as one tuft. If the carpet is not of uniform construction, note the form of construction. Repeat this measurement on each specimen in directions parallel to and at right angles to the selvedge. For some carpets, it can be difficult to count the number of tufts. In this case, it is allowed to shear the pile material before counting the number of tufts (see 3.1 for the definition of tuft). For artificial turf, the count shall be done at the backside of the product, if it only consists out of a primary backing or a woven backing. In that case, the counting starts where a tuft row begins and stops where the tuft row ends as illustrated in Figure 5: start counting at the beginning of a red block on the figure and stop counting at the beginning of the next red block.BS ISO 1763 pdf download.