1、 FORD LABORATORY TEST METHODBS 152-01Date Action Revisions 2004 05 26 Activated R. Carter Printed copies are uncontrolled Copyright 2004, Ford Global Technologies, LLC Page 1 of 4 Smoldering Test for Air Induction System Filter Media Application This procedure is used where specified to test the smo
2、lder propagation properties of flammable filtration media. Definitions and Concepts Flammable Material A material that will combust by flame or smolder or both when contacted by a hot object or when exposed to an external flame. Combustion Time The time from the start of combustion as a glowing fron
3、t or as a visible flame or both until test sample extinguishes. Smolder The combustion at a glowing edge on the material where the combustion proceeds without visible flame. Smolder Propagation The advancement of the glowing edge or front into the material. Smoldering Time The time that the smolder
4、propagates until extinguished or covers a defined distance into the material. Apparatus Required Laboratory supports and clamps to hold the sample. IR-12 Steady State Infrared Emitter (available at ) with 4.5-volt 8-watt supply Stop Watch (calibrated in seconds) Exhaust Hood Compass with lead pencil
5、 or an appropriately designed stamp to mark the pattern of circles required careful to choose marking material (ink) that does not interfere with combustion. Scissors Laboratory pan with water to extinguish burning specimens FORD LABORATORY TEST METHODBS 152-01Printed copies are uncontrolled Copyrig
6、ht 2004, Ford Global Technologies, LLC Page 2 of 4 Sample Conditioning and Test Conditions Test samples shall be conditioned in a controlled atmosphere of 23 +/- 2 C and 50 + 5% relative humidity for 24 hours before testing and tested under the same conditions. For samples in supplier QA testing tha
7、t are coming out of final processing, sample conditioning for 30 min at above conditions will be used. Procedure Note 1: All necessary Good Laboratory Practices must be observed and all required fire protection provisions must be in place per OSHA, Federal, State, and local Fire Codes while conducti
8、ng this test. Note 2: Do not use a lit candle or other source of flame to start the burning of the material. These are not controlled applications of heat and can increase the temperature of the test material to a level that will support rapid burning of the material. Note 3: This procedure is to be
9、 conducted twice on specimens taken from different places of the filter media. Note 4: Materials, parts and equipment referenced in this document must be used and handled properly. Each party is responsible for determining proper use and handling in its facility. 1. From pleated or flat sheet filter
10、 media processed to end-product form, cut a rectangular section approximately 100 - 150 mm per side. Trim off edges that have adhesive or sealant material. Draw a 12 mm diameter circle (or 5 mm larger than test probe longest dimension whichever is larger) in the middle of the test specimen, and then
11、 draw three additional concentric circles of 35, 50 and 70 mm diameter, respectively. (See Figure 1) 2. Mount the test specimen vertically on a supporting stand with clamps and place in a ventilated exhaust hood. To hold the pleats flat, the clamped end of the test specimen can be first sandwiched b
12、etween two flat and hard objects, such as plastic, wooden or metal rulers. Position the sample near eye level and about 40 cm away. Place a laboratory tray with water under the sample. (See Figure 2) 3. Turn the power on to the IR-12 heat source and allow the active area (or tip) to reach 800 C and
13、maintain thermal equilibrium (heat for at least 2 minutes; the tip temperature will reach 800 C when powered with 8 watts (4.5 volts, recommended) and 900 C when powered with 9 watts (5 volts). (See Figure 3) 4. Gently bring the hot tip in contact with center of the inner diameter circle on the test
14、 specimen until the paper burns through. Push the hot tip completely through to the other side of the test specimen and pull it back slowly, ensuring that the edges around the hole are fully exposed to the hot tip. When the material is burned through, start the stopwatch as you pull the heat source
15、away, but leave the element powered until the test is completely over. (See Figure 4) Should an S2 rating result solely from test initiation at an off-center the results will be reported as a NON-test and a new sample may be used. 5. Carefully observe the heat affected area on the sample for up to t
16、hree (3) minutes or until smolder self-extinguishes. (See Figure 5) FORD LABORATORY TEST METHODBS 152-01Printed copies are uncontrolled Copyright 2004, Ford Global Technologies, LLC Page 3 of 4 6. If the material burns with visible flames, report that the material burns with a flame and report dista
17、nce burned until it self-extinguishes or that sample did not extinguish. (Ensure burning pieces are extinguished in the tray under the test sample.) In general, this test is to be used in conjunction with a flammability test. It is anticipated that no flame will be generated during this testing. 7 I
18、f the combustion smolders and extinguishes report the farthest extent of any smoldering before extinguishing as a rating indicated in section 9. (Ensure smoldering pieces are extinguished.) 8 At the end of the test turn off the power to the heat source, allow it to cool, and store it away. Properly
19、dispose of the test specimens. Report rating as follows: Rating Performance S1 Self-extinguishes at or before the inner ring (see section #1 for dimension of inner ring) S2 Self-extinguishes between the inner and 35 mm rings S3 Self-extinguishes between the 35 mm and 50 mm rings S4 Does not self-ext
20、inguish in 3 minutes or consumes beyond 70 mm ring. Figure 1 Material with test pattern Figure 2 Sample in test stand FORD LABORATORY TEST METHODBS 152-01Printed copies are uncontrolled Copyright 2004, Ford Global Technologies, LLC Page 4 of 4 Figure 3 Hot wire element after 2 min. Figure 4 Hot wire element initiating test Figure 5 Smolder self-extinguished (left) or combustion reaches outer ring (right)
