ISO 15797:2017 pdf – Textiles — Industrial washing and finishing procedures for testing of workwear.
1 Scope This document specifies test procedures and equipment which can be used in the evaluation of workwear (including, where appropriate, for some PPE garments) intended to be industrially laundered. They serve as a basis for testing relevant properties such as dimensional stability, colour characteristics, creasing, seam puckering, pilling and visual aspects in general. This document does not provide instructions and specifications for the procedures and equipment to be used by industrial launderers. As it is often not practical to reproduce industrial laundry processes (washing and drying/finishing) in a laboratory setting, this document provides an approach using defined intermediate scale equipment and exacting test procedures which can be used for the evaluation of workwear intended to be laundered industrially. As this document reflects a simulation of real-life industrial laundry conditions, in some cases, testing of the workwear in the actual industrial laundering equipment and processes intended to be used is advisable when finally determining product and process compatibility. It is not necessary to test using all eight washing procedures nor both drying procedures. A selection is made of the washing and drying procedure(s) that are best suited to the characteristics of the fabric or fabric composition and the intended use. 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 139, Textiles — Standard atmospheres for conditioning and testing ISO 3071, Textiles — Determination of pH of aqueous extract ISO 3759, Textiles — Preparation, marking and measuring of fabric specimens and garments in tests for determination of dimensional change
5 Apparatus 5.1 Washer/extractor, with the following characteristics: a) front- or side-loading open pocket horizontal rotating drum type; b) cage volume: 220 l to 250 l; c) diameter of cage: 750 mm to 850 mm; d) depth of cage: 400 mm to 600 mm; e) ratio (diameter of cage to depth of cage): 1,5 ± 15 %; f) dead volume: 10 l to 20 l; g) lifting vanes (ribs): three; each having a height 10 % to 12 % of the diameter of cage; base width <100 mm; h) heating: direct steam or electric, thermostatically controlled; i) g-factors: wash 0,75 ± 10 %; drain 0,75 ± 10 %; interspin 50 to 100; final extraction 250 to 350; j) programmable extract speeds; k) reversible action, (5 to 10) revolutions in one direction, then reverse; l) time rotating at full washing speed to total washing time: 80 %. 5.2 Tumble dryer, with the following characteristics: a) air vented batch drying tumbler with a system for detecting the moisture content of the exhaust air to a tolerance of ±5 %; b) thermostatically controlled heating; c) diameter of cage: 900 mm to 1 100 mm; d) depth of cage: 630 mm to 1 000 mm; e) cage volume: 600 l to 720 l; f) g-factor: 0,7 to 1,0; g) reversing action: yes; h) nominal evaporation rate: 45 l/h ± 20 %; i) radial airstream: yes; j) perforated drum: yes. 5.3 Finisher, with the following characteristics: a) batch-loaded steam cabinet; b) capacity: (8 to 18) pieces/garment; c) spray steam pressure: 2 bar to 5 bar (200 kPa to 500 kPa); d) specific volume flow (within cabinet): 6 900 m 3 /m 2 h to 8 900 m 3 /m 2 h; e) direction of air flow: top to bottom;
5.4 Loading ballast, consisting of clean workwear garments (lab coats, bib and brace, overalls, jackets, trousers and boiler suits) not previously washed more than 100 times and similar to the type of garment and fabric of the specimen (e.g. polyester/cotton or cotton) and the colour (e.g. white, coloured or fluorescent coloured). In cases where the ballast material may have a significant influence on the test result, the entire loading ballast shall consist of the specimen material, e.g. when testing contrasting colours or multicoloured material in textiles. 6 Reagents 6.1 Reference detergents. The nominal composition of the reference detergents is given in 6.1.1 and 6.1.2. The reference detergent (with optical brightener) (6.1.1) can be used except when colour characteristics are being assessed. The reference detergent shall be stored in closed containers in a cool and dry place.