1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS EN 16094:2012Laminate floor coverings Test method for the determination of micro-scratch resistanceBS EN 16094:2012 BRITISH STANDARDNational forewordThis British Standard is t
2、he UK implementation of EN 16094:2012. The UK participation in its preparation was entrusted to T e c h n i c a l Committee PRI/3/60, Textile the “clamping ring and mechanism” is not necessary; the “specimen holder” is the holder for the scrub material; the “loading pieces” are not necessary. 5.2 Ho
3、lder for scrub material: The holder for scrub material shall be as described in EN ISO 12945-2, with the following exceptions: version 1: the rubber retaining ring is not required. This assembly consists of spindle, scrub holder and small ring weight. The total mass of this assembly is (413 2) g (no
4、minally called 4N); version 2: the assembly according to version 1, however the small ring weight is replaced by the large weight. The total mass of this assembly is (612 2) g (nominally called 6N). 5.3 Diffuse light source: Light source providing evenly diffused light giving an illumination on the
5、test surface of (1 200 400) lx. This may be either diffuse daylight or diffuse artificial daylight. The daylight should be unaffected by surrounding trees, etc. When artificial daylight is used, it is recommended that it should have a correlated colour temperature of (6 500 50) K and an Ragreater th
6、an 92, by using a colour matching booth in accordance with EN ISO 3668:2001 1. 5.4 Reflectometer: For gloss measurement with 3 angle measurement geometry as described in EN ISO 2813. 5.5 Positioning device: For gloss measurement on the same position before and after the test with 4 measurement point
7、s. An example of a positioning device is shown in Figure 1. BS EN 16094:2012EN 16094:2012 (E) 6 Dimensions in millimetres Reflectometer direction of movement for the measurement Key 1 measurement area Figure 1 Sample with measurement area for the 4 gloss measurement points 5.6 Scrub materials: The s
8、crub material shall be a nylon web imbedded with alumina abrasive. Two types of scrub materials (very fine and medium fine) are to use. The scrub materials shall be cut or stamped on a diameter of (89 1) mm. NOTE Scotch Brite fleece SB 7447 (very fine) and SB 7440 (medium fine) are examples of a sui
9、table product available commercially. This information is given for the convenience of users of this European Standard and does not constitute an endorsement by CEN of this product. 5.7 Double-sided tape: The double-sided tape is to attach the scrub material on the guide plate of the holder and the
10、sample on the table. 5.8 Soft cotton cloth: The soft cotton cloth is for cleaning of the samples before and after the test. BS EN 16094:2012EN 16094:2012 (E) 7 6 Assembly and maintenance of the Martindale tester The assembly of the tester shall be carried out in accordance with the instructions of t
11、he apparatus manufacturer. For the described test, the outer position C shall be used for both axes to create the larger Lissajous figure as explained in EN ISO 12947-1 or the manufacture guidebook. The checking of the Lissajous figure shall be done according to Annex A. 7 Preparation and conditioni
12、ng 7.1 Preparation Six samples with the dimensions of 150 mm 150 mm shall be prepared. The surface of the samples shall be substantially flat. If the panel width is smaller than 150 mm, assemble a sample of two parts with length joint in the middle. 7.2 Test surface Conditioning of test surface shal
13、l begin at least one week before testing and shall be carried out in air at a temperature of (23 2) C and relative humidity of (50 5) %. 8 Test procedure 8.1 General Two different procedures (A / B) are described. All the necessary parameters (scrub material, load, speed factor, number of cycles) ar
14、e shown in Table 1. Table 1 Test procedures for determination of resistance to micro scratches Test parameter Procedure A Procedure B Scrub material Very fine Medium fine Holder for scrub material Version 2 (Sample holder plus large weight) Version 1 (Sample holder plus small weight) Speed factor 1
15、1 Number of rubs 80 rubs (= 5 Lissajous movements) 160 rubs (= 10 Lissajous movements) Assessment Gloss change Visual according to Annex B BS EN 16094:2012EN 16094:2012 (E) 8 8.2 Testing 8.2.1 Procedure A Immediately after conditioning, the test shall be carried out in a test temperature of (23 2) C
16、 at 3 samples. Before starting the test, the samples shall be cleaned with a soft cotton cloth (5.8). Before the test, 4 gloss measurements on each sample using the reflectometer (5.4) with a geometry of 60 and the positioning device (5.5) shall be carried out. If there is a decor or preferential st
17、ructure direction or a joint on the sample the measurement shall be done parallel to this direction. Calculate the mean value for each sample. The gloss measurement on samples with a joint has to be made at least 5 mm away from the joint. If the mean value is higher than 70 (high gloss surface), fou
18、r additional measurements with the 20 geometry shall be carried out. NOTE Polishing effects on mat surfaces (R 10 % to 30 % MSR-A3 30 % to 50 % MSR-A4 50 % to 70 % MSR-A5 70 % BS EN 16094:2012EN 16094:2012 (E) 9 8.2.2 Procedure B Immediately after conditioning, the test shall be carried out in a tes
19、t temperature of (23 2) C at 3 samples. Before starting the test, the samples shall be cleaned with a soft cotton cloth (5.8). Fix the sample on the table of the Martindale tester using the adhesive tape (5.7). The medium fine scrub material (5.6) shall be fixed on the guide plate of holder with the
20、 adhesive tape. Select 160 rubs on the counter of the Martindale device and start the test. After finishing, remove the sample from the table and clean it with the cotton cloth (5.8). Remove also the used scrub material. Store the samples for 24 h in the climate of (23 2) C and relative humidity of
21、(50 5) %. Carefully examine the test surface with light coming from all directions for scratches using the scheme according to Annex B. For this purpose, illuminate the surface separately using the diffuse light source (5.3) and examine from different angles, including angle combinations such that t
22、he light is reflected from the test surface and towards the observers eye. Viewing distance shall be (0,3 0,05) m. The visual assessment shall be done by observers experienced in visual assessments of surfaces. In a case of doubt, three observers shall assess. If more than one observer has assessed
23、the surface, calculate the mean value of the assessments for every sample and round it on the next integral number. Calculate the mean value of the three samples and round it on the next integral number. 9 Test report The test report shall include at least the following information: reference to thi
24、s European Standard; description of the laminate floor coverings which the samples were taken from (if possible); the test temperature or temperatures; conditioning time; the mean values and classes for the results of the test according to procedures A and B with 8.2; any deviations from this Europe
25、an Standard; name and address of the test facility; date of the test. BS EN 16094:2012EN 16094:2012 (E) 10 Annex A (normative) Method for checking the Lissajous figure Obtain the Lissajous figure for each workstation by means of the following method: Remove materials from the abrading tables. Cover
26、each abrading table surface with a plain paper measuring (100 5) mm in diameter of minimum mass per unit area 100 g/m and secure paper to abrading table ensuring the surface is perfectly flat. Insert a steel sleeve of the same diameter as the specimen guide spindle counterbored to accept the introdu
27、ction of a refill from a typical ballpoint pen through each of the specimen holder spindle bearings in turn in the specimen holder guide plate, so that the ball tip is resting on the surface of the paper. Set the machine for 16 rubs to produce one complete Lissajous figure. Draw two parallel lines w
28、hich just touch the outermost curves on two opposing sides of the Lissajous figure. Draw two more parallel lines for the other two sides making sure the lines intersect at right angles. Measure each side to an accuracy of 0,2 mm using suitable means. Check that 31 curves are drawn. It is important t
29、o check the symmetry of the Lissajous figures. If the curves run into one another or if the spacing is uneven (see Figure A.1), consult the machinery supplier. a) acceptable b) unacceptable c) unacceptable Figure A.1 Examples of acceptable and unacceptable Lissajous figures BS EN 16094:2012EN 16094:
30、2012 (E) 11 Annex B (normative) Classification of the image after scratching according to procedure B For the visual assessment of the surface after scratching according to procedure B, the classification given in Table B.1 shall be used. Table B.1 Classification for visual assessment according to p
31、rocedure B Resistance class Scratch picture Explanation MSR-B1 No visible scratches MSR-B2 Only few scratches MSR-B3 Many well visible scratches MSR-B4 A great many well visible raw and fine scratches, Lissajous figure partly visible MSR-B5 Mix of Lissajous figure and great many scratches, mat abras
32、ion like area in the middle BS EN 16094:2012EN 16094:2012 (E) 12 Bibliography 1 EN ISO 3668:2001, Paints and varnishes Visual comparison of the colour of paints (ISO 3668:1998) This page deliberately left blankBSI is the independent national body responsible for preparing British Standards and other
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