1、Designation: F1414 13Standard Test Method forMeasurement of Cut Resistance to Chain Saw in LowerBody (Legs) Protective Clothing1This standard is issued under the fixed designation F1414; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revisi
2、on, the year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope1.1 This test method measures cut resistance of garmentsand devices worn to protect the lower body (legs)
3、whenoperating a chain saw.1.2 This test method may be used to test for compliance tominimum performance requirements in established safety stan-dards.1.2.1 By agreement between the purchaser and the supplier,or as required by established safety standards, it will bedecided if this test method will b
4、e used to determine one orboth of the following: (1) chainspeed 50 (CS50), and (2)success/failure (jamming/chain stop or no cut in less than 1.5seconds) at specified chain speed.1.3 This test method may be used to determine levels ofprotection for areas of coverage as stipulated in establishedsafety
5、 standards.1.4 The values stated in SI units are to be regarded asstandard.NOTE 1The values stated in each system may not be exact equiva-lents; therefore, each system must be used independently of the other,without combining values in any way.1.5 This standard does not purport to address all of the
6、safety concerns, if any, associated with its use. It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2. Referenced Documents2.1 The following documents, form a part of this
7、 specifica-tion to the extent referenced herein:2.2 ASTM Standards:2D123 Terminology Relating to TextilesD1056 Specification for Flexible Cellular MaterialsSponge or Expanded RubberD1776 Practice for Conditioning and Testing TextilesF1494 Terminology Relating to Protective Clothing2.3 AATCC Test Met
8、hods:AATCC 96 Dimensional Changes in Laundering of Wovenand Knitted Fabrics, except Wool (1988)3AATCC 158 Dimensional Changes on Dry Cleaning inPerchloroethylene: Machine Method32.4 Military Standards:MIL-STD-105 Sampling Procedures and Tables for Inspec-tion by Attributes42.5 Federal Standard:FS 51
9、00-86 Type II, Cloth, Duck, Nylon, PolyurethaneCoated43. Terminology3.1 Definitions:3.1.1 chain saw, na portable power operated tool used forcutting wood which has cutters linked in a chain.3.1.2 chain speed, nthe velocity of synchronized move-ment of linked cutters around a guide bar and sprocket.3
10、.1.3 chainspeed 50 (CS50), nfor chain saw protection,the mean velocity at which cut through occurs.3.1.3.1 DiscussionThis value establishes the relationshipbetween the probability of cutting through the protectiveclothing (or foot protective device) and the speed of the sawchain. For lower chain spe
11、eds, the probability of cut throughapproaches zero, while for higher chain speeds, the probabilityof cut through approaches one.3.1.4 chain stop, nthe resulting action when a materialclogs (jams) the drive sprocket or slows the speed sufficientlyto prevent advancement of the saw chain.3.1.5 cut resi
12、stance, nin chain saw testing, the ability of amaterial, while in contact with the linked cutters, to resist cut1This test method is under the jurisdiction ofASTM Committee F23 on PersonalProtective Clothing and Equipment and is the direct responsibility of SubcommitteeF23.20 on Physical.Current edi
13、tion approved Jan. 1, 2013. Published January 2013. Originallyapproved in 1992. Last previous edition approved in 2004 as F1414 - 04. DOI:10.1520/F1414-13.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTM
14、Standards volume information, refer to the standards Document Summary page onthe ASTM website.3Available from American Association of Textile Chemists and Colorists(AATCC), One Davis Dr., P.O. Box 12215, Research Triangle Park, NC 27709-2215.4Available from Standardization Documents Order Desk, Bldg
15、. 4 Section D, 700Robbins Ave., Philadelphia, PA 19111-5094, Attn: NPODS.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States1through of the cutters of a moving saw chain independent ofeither jamming or chain stop.3.1.6 cut-through, n for
16、chain saw cut resistance, theaction of a running chain saw after complete breakthrough ofeither a protective garment or protective device.3.1.6.1 DiscussionWhen a cut through is effected, speedof the saw chain must be measured.3.1.7 jamming, nfor chain saw cut resistance, the clog-ging action manife
17、sted by a protective garment or a device thatcan produce a chain stop.3.1.8 lower body, nthat part of the human body whichincludes all portions between the waist and feet, not to includethe feet.3.1.9 protective clothing, nan item of clothing that isspecifically designed and constructed for the inte
18、nded purposeof isolating all or part of the body from a potential hazard, orisolating the external environment from contamination by theclothing.3.1.9.1 DiscussionFor chain saw cut resistant protectiveclothing, the potential hazard is exposure to a running powersaw chain.3.1.10 saw chain, na closed
19、loop of cutters linked togetherfor use in a portable power-operated tool.3.2 For definitions of other textile terms used in this testmethod, refer to Terminology D123.3.3 For definitions of other protective clothing, terms usedin this test method, refer to Terminology F1494.4. Summary of Test Method
20、4.1 Test specimens are securely mounted on a test apparatuswhich simulates a human leg.4.2 A chain saw, of specific characteristic and operating at adesignated speed, is brought into contact with the test speci-men.4.2.1 The cutting action of the saw chain will achieve one ofthe following results; (
21、1) complete cut through with chain stop,(2) complete cut through without chain stop, (3) no cut throughwith a chain stop, or (4) no cut through without a chain stop.4.3 Chain speed is measured electronically just prior tocontact with test specimen. Chain speed is adjusted andreported based on these
22、measurements.NOTE 2Materials may be characterized by repeated testing at differentspeeds, followed by a calculation of CS50. Alternatively, for qualitycontrol, results may be reported as pass or fail at one pre-selected chainspeed.5. Significance and Use5.1 The purpose of this test method is to prov
23、ide a measur-able criterion of performance about the level of cut resistanceprovided by different types of protective garments and pro-tected coverings worn by chain saw operators.5.2 This test method is intended to show to what level aprotective garment can offer resistance to the cutting action of
24、a chain saw.5.3 The protection which can be demonstrated by thegarments and coverings tested in accordance with this testmethod is achieved by: (1) the cut resistance of the material tocutting when put in contact with saw chain; (2) pulling a partof the material or yarns in the material so that they
25、 are drawninto the chain and drive mechanism to block the chainmovement; (3) the fibers of the materials used to demonstrateboth high resistance to cutting and the capacity to absorbrotational energy, so that chain speed can be slowed downsufficiently to stop the movement of the saw chain; or (4) an
26、ycombination of these.5.4 This test method does not purport to evaluate comfort oflower body protective garments.5.5 In case of a dispute arising from differences in reportedtest results when using this test method for acceptance testingof commercial shipments, the purchaser and the suppliershould p
27、erform comparative tests to determine if there is astatistical bias between their laboratories. Competent statisticalassistance is recommended for the investigation of bias. As aminimum, the two parties should take a group of test speci-mens from the same lot of components to be evaluated. The tests
28、pecimens should then be randomly assigned in equal numbersto each laboratory for testing. If a bias is found, either its causemust be determined and corrected or the purchaser and thesupplier must agree to interpret future test results in light of theknown bias.6. Apparatus56.1 Apparatus consists of
29、 three main components:6.2 Specimen Holder:6.2.1 A stationary wooden cylinder having a diameter of150 mm (6 in.) and a minimum length of 350 mm (14 in.) (seeFig. 1).6.2.1.1 The cylinder is covered with a vinyl nitrile foamhaving a thickness of 18 mm (0.75 in.) (see Fig. 1). Thiscovering shall have a
30、 density between 55 and 80 kg/m2and itsresistance to a 25 % compression shall be between 10 and 20kPa measured in accordance with the testing procedure inSpecification D1056.NOTE 3Ensolite M, a synthetic foam rubber made of PVC and NBR,meets the requirements stipulated in Specification D1056.6.2.1.2
31、 Two specimen attachment plates each secured bytwo screws to the wooden cylinder parallel to the axis of thatcylinder. Each plate is 75 by 25 mm (3 by 1 in.) (see Fig. 1).6.2.1.3 The stationary wooden cylinder shall be attached toa swivel mechanism that allows the mandrel to be moved to anangle of e
32、ither 45 or 90 to the vertical plane of the guide bar.Specimen must be securely attached to mandrel to preventmovement of specimen.5See Appendix X1 to review maintenance checklist.F1414 1326.3 Chain Saw and Related Equipment:6,76.3.1 Saw:6.3.1.1 A gas-powered chain saw having an idle speed of2250 6
33、250 rpm, a maximum power of 3.3 6 0.3 kW at 8500rpm that meets the following specifications: (1) 66.7 cm3or 4.0in.3; (2) bore 50 mm; (3) stroke 34 mm; (4) clutch engagementspeed of 3450 6 250 rpm; (5) maximum no load speed of12 500 rpm; (6) maximum no load chain speed of 27 m/s (5475f/m); and (7)38
34、by 7 tooth rim drive sprocket. (Figs. 3 and 4)6.3.1.2 Throttle control mechanism is used to maintainconstant saw chain speed.6.3.1.3 The engine of the chain saw is a two-stroke enginethat uses a gasoline/oil mixture. The gasoline shall be apremium unleaded without alcohol additive and having aminimu
35、m anti-knock rating of 90. The oil shall be a high-quality two-stroke oil especially developed for chain saws. Mixratio is 50+1(2%two-stroke oil to 98 % gasoline).6.3.1.4 Chain saw power head shall be checked using adynamometer after any of the following: (1) when CS50 of acalibration sample lot exc
36、eeds a range of speed greater than13.9 m/s 6 1.0 m/s (2750 fpm 6 200 fpm); (2) after 120 testcuts; or (3) when chain saw has been idle for more than 30days.6.3.1.5 The chain saw shall be fitted with a resistive typeplug to reduce interference with the chain speed electronics.NOTE 4When testing const
37、raints prevent dynamometer verification,technician is responsible to check that the engine is running smoothly,starts readily, has a clean screen, if present, a good spark plug, and soforth.NOTE 5All requirements of the chain saw are determined in accor-dance with many manufacturers published specif
38、ications.6Husqvarna Model 266, XP with a seven tooth drive sprocket, available fromHusqvarna, 907 W. Irving Park Road, Itasca, IL 60143, 312-773-2777.7This is the sole source of supply known to the committee at this time. If you areaware of alternative suppliers, please provide this information to A
39、STM Headquar-ters. Your comments will receive careful consideration at a meeting of theresponsible technical committee,1which you may attend.Item Quantity DescriptionA 1 steel plate 0.25 by 576 by 670 mmB 2 steel plate 0.25 by 216 by 375 mmC 2 steel plate 0.25 by 208 by 216 mmD 1 steel tube 0.75 by
40、ID 1 mm OD by 172 mmE 1 aluminum plate 0.5 by 4 by 14.5 mmF 1 hardwood or white pine 152 by 400 mmG 2 hinge3by3by116 in.H 1 foam pad 15 by 180 by 360 mm + glueI 6 threaded rod 0.40 by 16 by 120 mmJ 12 bolt0.40by16mmK 8 wood screw 8 by .75 mm TRL 1 steel axle .75 mm diameter 350 threaded .75mm 10 mm
41、80 mm at each endM 2 pillow block VPS112 valuline browingN 5 bolt0.75by10mmO 1 hexbolt0.75by10by70mmP 1 square 30 mm 90 mm 316 75LQ 1 stopping block 20 mm 40 mm 60LR 1 lever support316 80 mm 130 mmS 1 lever 0.25 by 60 by 120 mmT 1 axle 0.250U 1 compression springV 1 micro-switchW 1 safety shield piv
42、oting on DNOTE 1Measurements are in millimetres. Arcs of a circle aremeasured on the circumference of the wood cylinder.FIG. 1 Specimen Holder (Front View Facing Chain Saw)FIG. 2 Specimen Holder (Attachment and Positioning)FIG. 3 Post Contact with Specimen (Front View) and Data Acqui-sition SystemF1
43、414 1336.3.2 Chain:7,86.3.2.1 A chain with a pitch of 10 mm (38 in.), a 0.058-in.gage, and a round ground full chisel cutter.6.3.2.2 New chain may be used without sharpening or thechain must be sharpened using the sharpening procedure notedin Annex A1 before testing.6.3.3 Guide Bar:6.3.3.1 A guide b
44、ar having a length of 500 mm (20 in.) withan eleven-tooth roller-nose sprocket designed to accommodatea 10-mm (38-in.) pitch, 0.058 in. gage saw chain.6.3.3.2 The roller nose on the guide bar will need to becleaned at periodic intervals. To facilitate repeated cleanings,the rivets attaching the roll
45、er nose to the bar should bereplaced. Modification requires that rivets be removed andholes be enlarged by drilling, so that aircraft quality bolts andlocking nuts can be used.6.3.4 Chain Guidance and Lubrication:6.3.4.1 The saw chain shall be able to turn freely around thedrive sprocket and roller
46、nose. The system shall be adequatelylubricated. Chain tension shall be adjustable so that applicationof a force of 15 N on the middle of the guide bar causes a chaindeflection of 6 6 0.5 mm.6.4 Chain Saw Support Bracket:6.4.1 The saw is attached to a metal plate that rotates freelyaround the axle (s
47、ee Fig. 5 and Fig. 7).6.4.2 The horizontal distance between the pivot of the sawand the central axis of the specimen support is 365 6 1mm(14.2 6 0.125 in.) (see Figs. 5 and 6).6.4.2.1 The vertical distance between the pivot of the sawand the center of the drive sprocket cannot exceed 130 mm (5in.).6
48、.4.3 The mounting mechanism of the chain saw to thebracket shall be fixed.6.4.4 The guide bar falls perpendicular to the support axisand exerts a static force of 15 N at the point of contact.6.4.5 The vertical dropping distance to the point of contactwith foam is 50 mm (2 in.). The longitudinal axis
49、 of the guidebar is virtually horizontal at the moment of contact (see Figs.3 and 4).6.4.6 A trigger release mechanism allows free fall withoutinitial acceleration (see Figs. 4 and 6).6.5 Interfaced Data Acquisition System:6.5.1 The cutting time between wires placed on the top andbottom of the specimen is measured to 60.001 s.6.5.1.1 These wires are connected to the circuitry.6.5.2 The speed of the saw chain may be measured in metresper second or feet per minute (63 %) by means of a magneticpickup which reads data from a pickup band
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