1、August 2010 Translation by DIN-Sprachendienst.English price group 9No part of this translation may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).ICS
2、59.080.01!$jP otherwise, the test liquid can wet the underlying surface, not the actual test substrate, and thereby cause confusion in the reading of the results. 9.1.2 Equipment, benches and gloves should be free of silicone. Use of silicone-containing products could adversely affect oil repellency
3、 grades. 9.2 Wearing clean laboratory gloves (7.3), brush the pile of napped or pile substrates using the hand, in the direction giving the greatest lay of the surface prior to placing the drops of the test liquid. (The direction giving the lowest pile.) 9.3 Beginning with the lowest-numbered test l
4、iquid (oil test liquid No. 1), carefully place small drops (approximately 5 mm in diameter or 0,05 ml volume) on the test specimen in a minimum of five locations representing all physical and colour characteristics of the fabric. The drops should be approximately 4,0 cm apart. The dropper tip should
5、 be held at a height of approximately 0,6 cm from the substrate surface while placing drops. Do not touch the substrate with the dropper tip. Observe the drops for (30 2) s from approximately a 45 angle. Assess each drop in accordance with Figure 1. Immediately examine the reverse of the fabric for
6、any wetting. 1) White Textile Blotting Paper is the trade name of a product supplied by the American Association of Textile Chemists and Colorists (AATCC), P.O. Box 12215, Research Triangle Park, NC 27709-2215. This information is given for the convenience of users of this International Standard and
7、 does not constitute an endorsement by ISO of the product named. Equivalent products may be used if they can be shown to lead to the same results. EN ISO 14419:2010 (E) DIN EN ISO 14419:2010-08 6 9.4 If no penetration or wetting of the substrate at the liquidsubstrate interface and also no wicking a
8、round the drops occur, place drops of the next high-numbered test liquid at an adjacent site on the substrate so as not to interfere with the previous test and again observe for (30 2) s. Assess each drop in accordance with Figure 1. Immediately examine the reverse of the fabric for any wetting. 9.5
9、 Continue this procedure until one of the test liquids shows obvious wetting or wicking of the substrate under or around the drop within (30 2) s. A maximum of six tests (oil test liquids) may be performed on one test specimen. 9.6 Repeat the procedure with the second sample. A third sample may be r
10、equired (see Clause 11). 10 Evaluation 10.1 The oil repellency grade of a substrate is the numerical value of the highest-numbered test liquid which will not wet the substrate within a period of (30 2) s. A grade of zero (0) is assigned when the substrate fails the white mineral oil liquid test. Wet
11、ting of the substrate is normally evidenced by a darkening (greying/shadowing) of the substrate at the liquidsubstrate interface or wicking and/or loss of contact angle of the drop. On black or dark substrates, wetting can be detected by loss of “sparkle” within the drop. 10.2 Different types of wet
12、ting may be encountered depending on the finish, fibre, construction, etc.; and the determination of the end point can be difficult on certain substrates. Many substrates show complete resistance to wetting by a given test liquid as indicated by a clear drop with a high contact angle (see Figure 1,
13、Example A), followed by immediate penetration by the next higher-numbered test liquid. In these instances, the end point and oil repellency grade are obvious. However, some substrates show progressive wetting under several test liquids as evidenced by a partial darkening of the substrate at the liqu
14、idsubstrate interface (see Figure 1, Examples B, C and D). For such substrates, the point of failure is considered to be that test liquid which exhibits complete darkening of the interface or any wicking within (30 2) s. 10.3 A failure occurs when three (or more) of the five drops applied from a giv
15、en test liquid show complete wetting (see Figure 1, Example D) or wicking with loss of contact angle (see Figure 1, Example C). A pass occurs if three (or more) of the five drops applied show a clear, well-rounded appearance with high contact angle (see Figure 1, Example A). The grade is expressed a
16、s the value of the pass oil test liquid immediately prior to the fail oil test liquid. A borderline pass occurs if three (or more) of the five drops applied show the rounded drop with partial darkening of the test specimen (see Figure 1, Example B). The grade is expressed to the nearest 0,5 value de
17、termined by subtracting one-half from the number of the borderline pass test liquid. 11 Evaluation of results 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 agreement, a third determination should be ma
18、de. Report the grade of the third determination if that value is the same as either of the first two determinations. When the third determination is different from either of the first two, report the median value. For example, if the first two grades are 3,0 and 4,0 and the third determination is a
19、4,5 value, report the median value of 4,0. Report the oil repellency grade. This grade variation can be an indication of non-uniform fabric or contamination problems. EN ISO 14419:2010 (E) DIN EN ISO 14419:2010-08 7 Key A passes; clear, well-rounded drop B borderline pass; rounding drop with partial
20、 darkening C fails; wicking apparent and/or complete wetting D fails; complete wetting Figure 1 Example of assigned grades Source: American Association of Textile Chemists and Colorists (AATCC) 12 Test report The test report shall include the following information: a) reference to this International
21、 Standard, i.e. ISO 14419:2010; b) all information necessary to complete identification of the sample tested; c) number of specimens tested; d) conditioning and testing atmosphere used; e) any deviation from the procedure specified; f) test results; g) oil repellency grade. EN ISO 14419:2010 (E) DIN
22、 EN ISO 14419:2010-08 8 Annex A (informative) Precision and bias statement A.1 Precision A.1.1 Interlaboratory studies were conducted in September 1990 and April 1991 to establish the precision of this test method. The September interlaboratory study involved two participants at each of nine laborat
23、ories rating two specimens of each of four fabrics each day for three days. The grades from this study were concentrated into the 1-2 and 4-5 regions of the scale. The April interlaboratory study was conducted with fabrics responding in the 2-3 and 5-7 regions of the scale. This study involved two p
24、articipants at each of seven laboratories rating two specimens of each of two fabrics each day for two days. (Day interaction was shown not to be a significant factor in the analysis of the September study.) Results from both interlaboratory studies were combined for precision and bias statements. A
25、ll materials necessary for the studies were provided to each laboratory by AATCC including the standard test liquids. A video recording of the grading procedure prepared at the AATCC Technical Center by the subcommittee and visual examples of pass, borderline and fail conditions were included in the
26、 protocol. The fabrics were limited to polyester/cotton materials. The unit of measure was the median of the grades of the two (or three) specimens rated each day. A.1.2 The components of variance as standard deviations of the oil repellency grade were calculated to be as follows: Oil repellency tes
27、t Single operator 0,27Between operators/within laboratories 0,30Between laboratories 0,39A.1.3 Critical differences: for the components of variance in A.1.2, two observations should be considered significantly different at 95 % probability level, if the difference equals or exceeds the critical diff
28、erences shown in Table A.1. Table A.1 Critical differences No. of observationsaSingle operator Within laboratory Between laboratories 1 0,75 1,12 1,55 2 0,53 0,99 1,45 3 0,43 0,94 1,42 NOTE The critical differences were calculated using t = 1,950 from the Students t distribution which is based on in
29、finite degrees of freedom. a An observation is a unit of measure obtained from the median of the grades for 2 (or 3) specimens. A.2 Bias The true value of the oil repellency grade can only be defined in terms of this test method. Within this limitation, this test method has no known bias. EN ISO 144
30、19:2010 (E) DIN EN ISO 14419:2010-08 9 Bibliography 1 ISO 3175-1, Textiles Professional care, drycleaning and wetcleaning of fabrics and garments Part 1: Assessment of performance after cleaning and finishing 2 ISO 3175-2, Textiles Professional care, drycleaning and wetcleaning of fabrics and garmen
31、ts Part 2: Procedure for testing performance when cleaning and finishing using tetrachloroethene 3 ISO 3175-3, Textiles Professional care, drycleaning and wetcleaning of fabrics and garments Part 3: Procedure for testing performance when cleaning and finishing using hydrocarbon solvents 4 ISO 3175-4
32、, Textiles Professional care, drycleaning and wetcleaning of fabrics and garments Part 4: Procedure for testing performance when cleaning and finishing using simulated wetcleaning 5 ISO 6330, Textiles Domestic washing and drying procedures for textile testing 6 ISO 6530, Protective clothing Protection against liquid chemicals Test method for resistance of materials to penetration by liquids EN ISO 14419:2010 (E) DIN EN ISO 14419:2010-08 10
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