1、Designation: F 1790 05Standard Test Method forMeasuring Cut Resistance of Materials Used in ProtectiveClothing1This standard is issued under the fixed designation F 1790; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of
2、last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon (e) indicates an editorial change since the last revision or reapproval.1. Scope1.1 This test method covers the measurement of the cutresistance of a material when mounted on a mandrel andsubjected to
3、a cutting edge under a specified load.1.1.1 This procedure is not valid for high-porosity materialswhich allow cutting edge contact with the mounting surfaceprior to cutting.1.1.2 Test apparatus may have limitations in testing thickermaterials; see the Annex, or the equipment manufacturersspecificat
4、ions.1.2 The values stated in SI units or in other units shall beregarded separately as standard. The values stated in eachsystem may not be exact equivalents; therefore, each systemmust be used independently of the other, without combiningvalues in any way.1.3 This standard does not purport to addr
5、ess all of thesafety 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 ASTM Standards:2D 123 Terminol
6、ogy Relating to TextilesD 1776 Practice for Conditioning Textiles for TestingF 1494 Terminology Relating to Protective Clothing2.2 ASTM Adjuncts:Cut Test Video Demonstration33. Terminology3.1 Definitions:3.1.1 cut resistance, nin blade cut testing, the propertythat hinders cut through when a materia
7、l or a combination ofmaterials is exposed to a sharp-edged device.3.1.2 cut through, nin blade cut resistance tests, thepenetration of the cutting edge entirely through material, asindicated by electrical contact of the cutting edge and theconductive strip or substrate.3.1.3 cutting edge, nin cut re
8、sistance tests, a sharp-edgeddevice used to initiate cut through of a planar structure.3.1.4 protective clothing, na product which is specificallydesigned and constructed for the intended purpose of isolatingparts of the body from a potential hazard; or as a barrier toprevent the body from being a s
9、ource of contamination.3.1.4.1 DiscussionIn this test method, the potential haz-ard is cutting.3.1.5 reference distance, nin cut resistance testing, astandardized distance for a blade to travel across a material toproduce a cut through.3.1.5.1 DiscussionFor this test method, the referencedistance is
10、 20 mm 0.8 in.3.1.6 rating force, nin cut resistance testing, the loadrequired to cause a cutting edge to produce a cut through whenit traverses the reference distance across the material beingtested.3.1.6.1 DiscussionThe rating force is the final result ofthis test method, the force required to pro
11、duce a cut through in20 mm of blade travel. A material with a higher rating force isconsidered to be more cut resistant.3.2 Additional TerminologyTerms relevant to textiles aredefined in D 123. Terms relevant to protective clothing aredefined in F 1494.4. Summary of Test Method4.1 A cutting edge, wi
12、th a specified load, is moved one timeacross a specimen mounted on a mandrel.4.2 The distance is recorded, from initial contact to cutthrough, for each load.4.2.1 A series of tests, at a minimum of three differentloadings must be performed to establish a range and todetermine the rating force.1This
13、test method is under the jurisdiction of ASTM Committee F23 onProtective Clothing and is the direct responsibility of Subcommittee F23.20 onPhysical Properties.Current edition approved January 1, 2005. Published August 2005. Originallyapproved in 1997. Last previous edition approved in 2004 as F 179
14、0 - 04.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.3Available from ASTM Headquarters. Request Adjunct No.
15、 ADJF1790.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.4.3 The resulting load versus distance curve can be used todetermine cut resistance of the specimen.5. Significance and Use5.1 This test method assesses the cut resistance of
16、a materialwhen exposed to a cutting edge under specified loads. Dataobtained from this test method can be used to compare the cutresistance of different materials.5.2 This test method only addresses that range of cuttinghazards that are related to a cutting action across the surface ofthe material.
17、It is not representative of any other cutting hazardto which the material may be subjected such as serrated edges,saw blades or motorized cutting tools. Nor is it representativeof puncture, tear, or other modes of fabric failure.6. Apparatus6.1 Cut Test Apparatus:6.1.1 The cut test apparatus is desi
18、gned to measure thedistance traveled by the cutting edge as it is maintained undera known load during the test, so that force distance data can begenerated.Aschematic of the cut test principle is shown in Fig.1. A motor-driven balanced arm (A) holding the cutting edge(B) in contact with the specimen
19、 mounted on a mandrel (C).The arm propels the blade across the specimen until sufficientforce is applied to cause the specimen to sustain a cut through.The force is generated entirely by the weights mounted on thelever arm assembly. See Annex for details on available cutprotection test equipment.6.1
20、.1.1 The cut test apparatus is powered by a constantspeed electric motor. The motor speed is adjusted by a powercontroller. The cut through is electronically recorded as thecutting edge cuts through the specimen and makes electricalcontact with the conductive strip or substrate. The distancetraveled
21、 is recorded on a distance meter capable of recording to0.1 mm 0.004 in.6.1.2 Weights are mounted on the lever arm assembly. Theapparatus must be capable of handling loads ranging from 10g 0.35 oz to 15 kg 33 lb.6.2 MandrelThe top surface of the mandrel is a roundedform which has an arc of at least
22、32 mm 1.25 in. in a circlehaving a radius of 38 mm 1.5 in. The surface of the mandrelshould either be made of electroconductive material or becovered with an electroconductive material.6.3 Blade4,5Blades shall be made of stainless steel with ahardness of 78-80 on the 30N scale or approximately 59-64
23、HRC. Blades shall be 1.0 6 0.5 mm 0.039 6 0.020 in. thickand ground to a bevel width of 2.5 6 0.2 mm 0.098 6 0.008in. along a straight edge. This is an included angle ofapproximately 22 at the cutting edge. Blades shall have acutting edge length greater than 65 mm 2.56 in. and shallhave a width grea
24、ter than 18 mm 0.71 in.6.4 Calibration Material6,5Calibration material is a Neo-prene sheet having a hardness of 50 6 5 Shore A and athickness of 1.57 mm 0.062 in. 6 0.05 mm 0.002 in.6.4.1 This calibration material shall be stored under con-trolled laboratory conditions in an opaque container to pre
25、ventdeterioration by heat or ultraviolet light.6.5 Data AnalysisData analysis can be accomplished by acomputer, capable of analyzing the data collected using thebest method to fit the curve.7. Hazards7.1 The cut test equipment can pose a potential hazard to thetechnician if proper safety precautions
26、 are not followed. The4The sole source of supply of the Blade 88-0121 TYPE: GRU-GRU known tothe committee at this time is American Safety Razor Co., Razor Blade Lane,Vernona, VA 24482. It has proven satisfactory for this test method. Its specificationsinclude a cutting edge length greater than 69 mm
27、, width of greater than 18 mm, anda thickness of 0.85 to 0.93 mm. Steel hardness is designated using the Rockwell Chardness number (HRC) and the Rockwell Superficial Hardness number on the 30N scale.5If you are aware of alternative suppliers, please provide this information toASTM International Head
28、quarters. Your comments will receive careful consider-ation at a meeting of the responsible technical committee,1which you may attend.6The sole source of supply of the Neoprene, Style NS-5550, or equivalentsupplied by Reeves Brothers, Inc., Spartanburg, SC, known to the committee at thistime is Red
29、Clay, Inc., 2388 Brackenville Rd., Hockessin, DE 19707.NOTE 1Legend:ABlade holder and straight line mechanismBBladeCSampleDMandrelFIG. 1 Schematic of Cut Testing PrincipleF1790052cut test apparatus is to be used only by authorized personnelthat have been properly trained.7.2 Remove weights when inst
30、alling or removing a blade.7.3 Store used blades in a sealed container.7.4 Remove blades at the end of each test or when not inuse.7.5 KEEP HANDS OUT OF CUTTING AREA WHEN ABLADE IS IN CUT POSITION.7.6 Turn off machine before making instrument adjustmentsto avoid the chance of a low-voltage shock.7.7
31、 Keep hands and fingers away from moving parts whenmachine is operating.8. Sampling8.1 Lot SampleAs a lot sample for acceptance testing,take at random the number of shipping units directed in anapplicable material specification.8.2 Laboratory SampleAs a laboratory sample for accep-tance testing, tak
32、e at random from each shipping unit in the lotsample, the number of packages or pieces directed in anapplicable material specification or other agreement betweenthe purchaser and the supplier.9. Conditioning9.1 Condition test specimens as indicated in PracticeD 1776.10. Procedure10.1 Test Specimens:
33、Cut a 50 mm by 100-mm 2 in. by 4-in. specimen at randomfrom each laboratory sampling unit. Cut all woven and knitstructures on the bias with the goal of making an angle of 0.785rad (45) between the warp and filling (wale and course)directions of the fabric and the blade.10.2 Preparation for Testing:
34、10.2.1 Test apparatus:10.2.1.1 Plug in cut test apparatus without weights or bladesin operating position.10.2.1.2 Turn machine on and adjust the motor drivenbalanced arm to ready position.10.2.1.3 Calibrate lever arm balance. See Annex or instru-ment manufacturers operating instructions.10.2.2 Speci
35、men mounting:10.2.2.1 Cover mandrel face with double-face tape.10.2.2.2 Place a 6-mm 0.25-in. strip of conductive foilcentered down the length of the mandrel on the double-facetape. Clip the end of this foil to the mandrel, or attach itsecurely to the electrical circuit that detects cut through inso
36、me other fashion.10.2.2.3 Without stretching or distorting it, place a speci-men over the tape with the surface to be cut facing up. Applyfirm pressure on the specimen.10.2.2.4 Insert the mandrel in the support column with therounded side facing the motor-driven balanced arm and alignso that the bla
37、de contact is centered on the rounded surface.Tighten mandrel in place, if appropriate.10.3 Validation of cutting edge supply:10.3.1 Calibrate the cutting edge supply using the Neoprenesheet calibration material.10.3.2 Cut a 50 mm by 100-mm 2 in. by 4-in. specimen ofthe calibration material and foll
38、ow mounting procedure de-tailed in 10.2.2.10.3.3 Validate the cutting edge supply by using a load of500 g on the calibration material at the beginning and end ofeach sample being tested, or validate one blade out of 20 foreach blade supply or manufacturing lot number. If using theTDM-100 tester or C
39、PP tester with modified arm, the cutthrough length for the calibration material must be between 15and 25 mm 0.6 and 1.0 in. If using the CPP tester with thestraight arm, the cut through length for the calibration materialmust be between 10 and 15 mm 0.4 and 0.6 in. The cutthrough lengths for all the
40、 blades in a lot should not differ inlength by more than 10 mm 0.40 in. Read the distance meterand record the distance if the cut through is within theacceptable range.10.3.4 When the length of cut through is outside thesedistances, check for the following:10.3.4.1 The cutting edges being used are n
41、ew.10.3.4.2 The Neoprene material is the same as that specifiedin Section 6.10.3.4.3 The calibration procedure for the lever arm indi-cates that the force at point of contact is generated by aneffective weight of 500 g, allowing for any lever-arm effects.10.4 Test procedure7:10.4.1 Cut the test spec
42、imen and follow mounting proce-dure detailed in 10.2.2.10.4.2 Verify that the cutting arm is at the ready position.All cuts will be made with the blade moving in the samedirection.10.4.3 Insert a new blade in arm slot. Keep it straight andfully seated in its mounting slot and tighten the blade clamp
43、ingsystem.10.4.4 Ensure that the blade does not touch the specimen.10.4.5 Select and install weights.10.4.6 Press the zeroing button on the distance meter.10.4.7 Carefully ease the blade into contact with the speci-men, and immediately start the machine. Make certain thatonly the blade edge and not
44、the corner of the blade is touchingthe specimen.10.4.8 Acut through should occur within one full traverse ofthe blade. The machine will stop automatically. Read thedistance meter, and record the distance and corresponding loadif the cut through is within the length range from 5 mm to 50mm 0.2 to 2.0
45、 in.10.4.9 For electrically conductive materials, take care toavoid premature electrical contact. An 8-mm 0.38-in. strip oftissue paper may need to be carefully aligned on top of theconductive foil strip before positioning the specimen.10.4.10 If no cut through occurs within one full traverse ofthe
46、blade, stop the machine. Lock the cutting arm with bladeoff the specimen, and remove the weights and blade. Move thespecimen 6 mm 0.25 in. to a new spot, install a new blade,7A CD-ROM (Adjunct No. ADJF1790) about this procedure is available. TheCD-ROM contains video which highlights key changes betw
47、een F 1790 - 97 andF 1790 - 04. It also illustrates how to perform a cut test in accordance withF 1790 - 04.F1790053return the motor-driven balanced arm to the ready position,increase the load, zero the distance meter, and retest.10.4.11 Lock the cutting arm with blade off the specimen,and remove th
48、e weights and blade. Move the specimen 6 mm0.25 in. to a new spot, install a new blade, increase ordecrease the load, return the motor-driven balanced arm to theready position, zero the distance meter, and retest. Continuetesting with changes in loads until a cut through is observedwithin one traver
49、se that causes the machine to stop. Read thedistance meter and record the distance and loading weight ifthe cut through is within the acceptable range from 5 to 50 mm0.2 to 2 in.10.4.12 Continue adjusting loads as needed and retesting tocollect five data points in the 5 to 20-mm 0.2 to 0.8-in.cut-through length range, five data points in the 33 to 50-mm1.3 to 2-in. cut-through length range, and five additionalpoints at any loading selection in between those used for theupper and lower cut-through lengt
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