AATCC 118 pdf free download

AATCC 118 pdf free download.Oil Repellency: Hydrocarbon Resistance Test.
4.3 Exposure to chemicals used in this procedure must be controlled at or below levels set by governmental authorities [e.g., Occupational Safety and Health Administration’s (OSHA) permissible exposure limits (PEL) as found in 29 CFR 1910.1000 of January 1, 1989]. In addition, the American Conference of Governmental Industrial Hygienists (ACGIH) Threshold Limit Values (TLVs) comprised of time weighted averages (TLV-TWA), short term exposure limits (TLV-STEL) and ceiling limits (TLV-C) are recommended as a general guide for air contaminant exposure which should be met (see 12.1). 5. Uses and Limitations 5.1 This test method is not intended to give an absolute measure of the resis- tance of the fabric to staining by all oily materials. Other factors, such as compo- sition and viscosity of the oily sub- stances, fabric construction, fiber type, dyes, other finishing agents, etc., also in- fluence stain resistance. This test can, however, provide a rough index of oil stain resistance, in that generally the higher the oil repellency grade, the better resistance to staining by oily materials, especially liquid oil substances. This is particularly true when comparing various finishes for a given fabric.7. Test Specimens 7.1 Test two specimens approximately 20x 20 cm(8x 8 in.) from each sample. Condition the test specimens for a mini- mum of4hat21土i°C(70士2°F) and 65 士2% RH prior to testing. 8. Procedure 8.1 Place the test specimen flat on the white textile blotting paper on a smooth, horizontal surface. 8.1.1 When evaluating open weave : of “thin”fabrics, conduct the test on at least two layers of the fabric; otherwise, the test liquid may wet the underlying sur- face, not the actual test fabric， and thereby cause confusion in the reading of the results. 8.1.2 Equipment, benches and gloves must be free of silicone. Use of silicone containing products could adversely af- fect the oil repellency grade. 8.2 Wearing clean laboratory gloves, brush the pile of napped or pile fabrics with your hand in the direction giving the greatest lay of the surface prior to placing the drops of the test liquid.8.3 Beginning with the lowest-num- bered test liquid (AATCC Oil Test Grade Liquid No.1), carefully place small drops [approximately 5 mm (0.187 in.) in diameter or 0.05 mL volume] on the test specimen in five locations along the fill- ing direction. The drops should be ap- proximately 4.0 cm (1.5 in.) apart. The dropper tip should be held at a height of approximately 0.6 cm (0.25 in.) from the fabric surface while placing drops. DO NOT TOUCH THE FABRIC WITH THE DROPPER TIP. Observe the drops for 30土2 s, from approximately a 45° angle. 8.4 If no penetration or wetting of the fabric at the liquid-fabric interface and no wicking around the drops occur, place drops of the next higher-numbered test liquid at an adjacent site on the fabric and again observe for 30士2 s. 8.5 Continue this procedure until one of the test liquids shows obvious wetting or wicking of the fabric under or around the drop within 30土2 s.10. Report 10.1 The oil repellency grade should be measured on two separate specimens. If the two grades agree, report the value. When the two grades are not in agree- ment, a third determination should be made. Report the grade of the third deter- mination if that value is the same as ei- ther of the first two determinations. When the third determination is different from either of the first two, report the me- dian value. For example, if the first two grades are 3.0 and 4.0 and the third deter- mination is a 4.5 value, report the median value of 4.0. Report the oil repellency grade to the nearest 0.5 value (see Fig. 1).AATCC 118 pdf download.