1、Designation: F1790/F1790M 14F1790/F1790M 15Standard Test Method forMeasuring Cut Resistance of Materials Used in ProtectiveClothing with CPP Test Equipment1This standard is issued under the fixed designation F1790/F1790M; the number immediately following the designation indicates the yearof original
2、 adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval.A superscript epsilon () indicates an editorial change since the last revision or reapproval.INTRODUCTIONCut resistance is an important property for protective clothing and
3、 equipment, and several standardtesting devices have been adopted across different industries to measure this property. A commonpractice in cut resistance testing is to subject a material specimen to a transversely moving blade underan applied load and measure the distance of blade travel required t
4、o cut through the specimen. Thistest method calculates the load required to cut through different specimens at 25.4 mm 1 in. bladetravel. This calculated load, defined as a rating the calculated cutting load, can be used to compare thecut resistance of materials.The original F1790-97 test method def
5、ined a commercially-available apparatus known as the CutProtection Performance Tester (CPP). In an attempt to harmonize F1790/F1790M with ISO1399613997 (another international testing standardsstandard for measuring cut resistance) andimprove the test method, the scope of the test method was changed
6、in F1790-05 to allow the use ofother cut testing equipment, specifically the Tomodynamometer (TDM-100) and a modification to theCPP arm called the Modified CPP (mCPP). The revision addressed issues related to measurement ofhigh frictional coefficient materials like elastomers, specimen mounting, rat
7、ing calculated cutting loadcalculation,determination, and other procedures to harmonize with ISO 13997:1999. After furtherround-robin evaluation by the subcommittee, it was demonstrated that the revisions to the test methodresult in a bias between the original F1790-97 test method and the revised F1
8、790-05 test method whenusing the CPP. F1790-05 was not widely adopted in North America because of this bias and largeamount of data and experience accumulated with F1790-97. F1790-97 continues to be the test methodpredominately practiced when using the CPP device. To reduce confusion for end-users o
9、fF1790/F1790M and to allow for differences between testing devices, the subcommittee has decided tolimit the scope of F1790/F1790M to include only the CPP device and createcreated a separate testmethod for use of the TDM-100.TDM-100 (Test Method F2992/F2992M).1. Scope1.1 This test method covers the
10、measurement of the cut resistance of a material when mounted on a mandrel and subjected toa cutting edge under a specified load using the Cut Protection Performance (CPP) Tester.1.1.1 This procedure is not valid for high-porosity materials which allow cutting edge contact with the mounting surface p
11、riorto cutting.1.1.2 Test apparatus may have limitations in testing materials with a thickness greater than 3 mm or having a high frictionalcoefficient such as elastomers.1.2 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each
12、system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from thetwo systems may result in non-conformance with the standard.1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is
13、the responsibilityof the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatorylimitations prior to use.1 This test method is under the jurisdiction of ASTM Committee F23 on Personal Protective Clothing and Equipment and is the direct
14、 responsibility of SubcommitteeF23.20 on Physical.Current edition approved Jan. 1, 2014Nov. 1, 2015. Published February 2014January 2016. Originally approved in 1997. Last previous edition approved in 20052014 asF1790 - 05.F1790/F1790M 14. DOI: 10.1520/F1790_F1790M-14.10.1520/F1790_F1790M-15.This do
15、cument is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Becauseit may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions a
16、s appropriate. In all cases only the current versionof the standard as published by ASTM is to be considered the official document.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States12. Referenced Documents2.1 ASTM Standards:2D123 Termino
17、logy Relating to TextilesD1000 Test Methods for Pressure-Sensitive Adhesive-Coated Tapes Used for Electrical and Electronic ApplicationsD1776D1776/D1776M Practice for Conditioning and Testing TextilesF1494 Terminology Relating to Protective ClothingF2992/F2992M Test Method for Measuring Cut Resistan
18、ce of Materials Used in Protective Clothing with Tomodynamometer(TDM-100) Test Equipment2.2 ISO Standards:3ISO 13996 Protective ClothingMechanical PropertiesDetermination of Resistance to PunctureISO 13997 Protective ClothingMechanical PropertiesDetermination of Resistance to Cutting by Sharp Object
19、s2.3 ASTM Adjuncts:Cut Test Video Demonstration43. Terminology3.1 Definitions:3.1.1 cut resistance, nin blade cut testing, the property that hinders cut through when a material or a combination of materialsis exposed to a sharp-edged device.3.1.2 cut through, nin blade cut resistance tests, the pene
20、tration of the cutting edge entirely through material, as indicated byelectrical contact of the cutting edge and the conductive strip or substrate.3.1.2.1 DiscussionFor this test, penetration of the cutting edge entirely through the material includes the specimen and mounting tape.3.1.3 cut through
21、distance, nin cut resistance testing, the distance of required travel by the cutting edge to cut through thespecimen.3.1.3.1 DiscussionFor this test distance of required travel by the cutting edge to cut through the specimen includes the specimen and mounting tape.3.1.4 cutting edge, nin cut resista
22、nce tests, a sharp-edged device used to initiate cut through of a planar structure.3.1.5 no cut, nin cut resistance testing, a trial for which the load used is insufficient to cause a cut through in the maximumallowable blade travel of the apparatus.3.1.5.1 DiscussionFor this test method, the maximu
23、m allowable blade travel is 50.8 mm 2.0 in.3.1.6 protective clothing, nan item of clothing that is specifically designed and constructed for the intended purpose ofisolating all or part of the body from a potential hazard; or, isolating the external environment from contamination by the wearerof the
24、 clothing.3.1.6.1 DiscussionIn this test method, the potential hazard is cutting.3.1.7 rating calculated cutting load, nin cut resistance testing, the load required to cause a cutting edge to produce a cutthrough when it traverses the reference distance across the material being tested.3.1.7.1 Discu
25、ssionThe rating calculated cutting load is calculateddetermined by performing a series of tests at three or more loads as described inSection 11. A material with a higher rating calculated cutting load is considered to be more cut resistant.2 For referencedASTM standards, visit theASTM website, www.
26、astm.org, or contactASTM Customer Service at serviceastm.org. For Annual Book of ASTM Standardsvolume information, refer to the standards Document Summary page on the ASTM website.3 Available from International Organization for Standardization (ISO), 1, ch. de la Voie-Creuse, CP 56, CH-1211 Geneva 2
27、0, Switzerland, http:/www.iso.org.F1790/F1790M 1523.1.8 reference distance, nin cut resistance testing, a standardized distance for a blade to travel across a material to producea cut through.3.1.8.1 DiscussionFor this test method, the reference distance is 25.4 mm 1.0 in.3.2 Additional TerminologyT
28、erms relevant to textiles are defined in Terminology D123. Terms relevant to protective clothingare defined in Terminology F1494.4. Summary of Test Method4.1 A cutting edge under a specified load is moved one time across a specimen mounted on a mandrel.4.2 The cut through distance from initial conta
29、ct to cut through, through is determined, for each load.4.2.1 A series of tests, at a minimum of three different loadingsloads must be performed to establish a range and to determinethe rating force.of cut distance at these different loads.4.3 The test method is repeated usinguses data from multiple
30、 loads to calculate a rating determine the calculated cutting loadfor the material.5. Significance and Use5.1 This test method assesses the cut resistance of a material when exposed to a cutting edge under specified loads. Dataobtained from this test method can be used to compare the cut resistance
31、of different materials.5.2 This test method only addresses that range of cutting hazards that are related to a cutting action by a smooth sharp edgeacross the surface of the material. It is not representative of any other cutting hazard to which the material may be subjected suchas serrated edges, s
32、aw blades or motorized cutting tools. Nor is it representative of puncture, tear, or other modes of fabric failure.6. Apparatus6.1 Test PrincipleThe principle of the cut test is to measure the distance traveled by a cutting edge as it is maintained undera load during the test.The cut test apparatus
33、consists of the following primary components (see Fig. 1): (A) a pivoting motor-drivenbalance arm to hold the cutting edge and to which the load is applied, (B) a cutting edge; and (C) a fixed supporting mandrel onwhich the specimen is to be mounted. The apparatus should propel the cutting edge acro
34、ss the specimen until sufficient work isapplied to cause the specimen to cut through.FIG. 1 Schematic of Cut Test PrincipleF1790/F1790M 1536.2 CPP Test Apparatus4The CPP test apparatus (see Fig. 2) consists of a motor-drivenMotor-driven balance arm (A) thatholds the cuttingCutting edge (B) in contac
35、t with the specimen mounted on a fixedFixed supporting mandrel (C). The balance armis connected to the motorMotor using a drive wheel (D) and a connectionConnection arm assembly (E). The diameter of the drivewheel is 50.8 mm 2.0 in., and the distance between the center of the drive wheel and attachm
36、ent point of the pivotConnectionarm assembly is 25.4 mm 1.0 in. resulting in a maximum linear displacement of 50.8 mm 2.0 in. for the balance arm and cuttingedge. Cutting edge displacement is measured by a distanceDistance meter (F) attached to the motor driven balance arm and pivotarm assembly that
37、 is capable of measuring to 0.1 mm 0.004 in. Weights are placed on a pivoting leverLever arm assembly (G)to generate the load needed to penetrate the moving edge into the specimen and produce a cut through. The location of the weighton the lever arm will determine the resulting load. Weights placed
38、on the location (G1) closest to the arm pivot (G1) will resultin a load equal to the applied weight. Weights place on the location furthest (G2) from the pivot (G2) will result in a load twicethat of the applied weight. The apparatus must be capable of loads ranging from 10 g 0.35 oz to 15 kg 33 lb.
39、Lever armcounterweight adjustment (H) is used to balance the arm prior to adding weight to the lever arm.6.2.1 Cutting SpeedActionThe apparatus shall propel the cutting edge across the specimen at an average speed of 4.2 mm/s0.17 in./s.motor and drive wheel must be set to rotate at 5.0 6 0.25 rpm. T
40、he distance from the center point of the motor anddrive wheel to the pivot point of the connection arm is 25.4 mm 1.0 in.NOTE 1Since the cutting edge is propelled by a rotating drive wheel, the resulting vertical speed is not constant during the test. The speed rangesfrom 0 mm/s at the start of the
41、test, then reaching a maximum of 14 mm/s at the midpoint of the during the test, and then decreases back to 0 mm/s bythe end of the test. The average speed blade during the test is thus 4.2 mm/s 0.17 in./s as calculated using the equation for angular velocity.6.2.2 Cut Through DetectionCut through i
42、s detected by an electrical contact between the cutting edge and the supportingmandrel.4 The sole source of supply of the CPP Tester known to the committee at this time is Red Clay, Inc., 2388 Brackenville Rd., Hockessin, DE 19707, E-mail:. If you are aware of alternative suppliers, please provide t
43、his information to ASTM International Headquarters. Yourcomments will receive careful consideration at a meeting of the responsible technical committee,1 which you may attend.FIG. 2 Schematic of the CPP Tester (Side View)F1790/F1790M 1546.2.3 MandrelThe top surface of the mandrel is a rounded form w
44、hich has an arc of at least 32 mm 1.25 in. in a circle havinga radius of 38 mm 1.5 in. The surface of the mandrel shall be conductive and made of metal.6.3 Cutting EdgeSingle-edged razor blades5 shall be used as the cutting edge. The blades shall be made of stainless steel witha hardness greater tha
45、n 45 HRC. Blades shall be 1.0 6 0.5 mm 0.039 6 0.020 in. thick and ground to a bevel width of 2.5 60.2 mm 0.098 6 0.008 in. along a straight edge resulting in a primary bevel angle of 22 6 2. The blade should also containa honed secondary bevel at the cutting edge with an inclined angle of 36 6 2. B
46、lades shall have a cutting edge length greaterthan 65 mm 2.56 in. and shall have a width greater than 18 mm 0.71 in.6.4 Mounting TapeDouble-sided tape6 shall be used to secure the test specimen to the apparatus. The tape should have a clothcarrier and rubber-based adhesive on both sides with a total
47、 thickness of 0.3860.25 mm, weight of 473633g/m2, and a minimumtensile strength of 90 N/cm (see Test Methods D1000 for details on test methods for adhesive tape).7. Hazards7.1 The cut test equipment can pose a potential hazard to the technician if proper safety precautions are not followed. The cutt
48、est apparatus is to be used only by authorized personnel that have been properly trained.7.2 Store used blades in a sealed container.7.3 Remove blades from the apparatus at the end of each test or when the apparatus is not in use.7.4 Keep hands out of cutting area when a blade is installed in the ap
49、paratus and when the apparatus is operating.7.5 Turn off machine before making instrument adjustments to avoid the chance of a low-voltage shock.8. Sampling and Test Specimens8.1 Lot SampleAs a lot sample for acceptance testing, take at random the number of shipping units directed in an applicablematerial specification.8.2 Laboratory SampleAs a laboratory sample for acceptance testing, take at random from each shipping unit in the lotsample, the number of packa
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