1、Designation: D 3772 01 (Reapproved 2005)Standard Specification forNatural Rubber Finger Cots1This standard is issued under the fixed designation D 3772; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revision. A n
2、umber in parentheses indicates the year of last reapproval. Asuperscript epsilon (e) indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the Department of Defense.1. Scope1.1 This specification covers the requirements for fingerc
3、ots made from natural rubber latex. The purpose of thisspecification is to obtain consistent performance among prod-ucts produced in various locations or at various times in thesame location.1.2 This specification does not cover the safe and proper useof finger cots or products of special constructi
4、on for specialuse.1.3 The values stated in SI units are to be regarded as thestandard.1.4 This standard does not purport to address 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 a
5、nd determine the applica-bility of regulatory limitations prior to use.2. Referenced Documents2.1 ASTM Standards:2D 412 Test Methods for Vulcanized Rubber and Thermo-plastic Rubbers and Thermoplastic ElastomersTensionD 573 Test Method for RubberDeterioration in an AirOvenD 865 Test Method for Rubber
6、Deterioration by Heatingin Air (Test Tube Enclosure)D 1076 Specification for RubberConcentrated, AmmoniaPreserved, Creamed, and Centrifuged Natural LatexD 3767 Practice for RubberMeasurement of Dimensions2.2 Other Documents:ISO 2859 Sampling Procedures and Tables for Inspectionby Attributes3Code of
7、Federal Regulations, Title 21Food and DrugAdministration, Part 17743. Classification3.1 Types:3.1.1 Type 1Rolled.3.1.2 Type 2Flat.3.2 SizesThe sizes covered are small, medium, large, andextra large.4. Ordering Information4.1 Orders for material under this specification shall includethe following inf
8、ormation:4.1.1 Reference to this ASTM designation (D 3772) andyear of issue,4.1.2 Type,4.1.3 Thickness (if different than that specified), and4.1.4 Size.5. Materials and Manufacture5.1 Finger cots shall be manufactured from latex conform-ing to Specification D 1076.5.2 Finger cots shall be free of e
9、mbedded grit or discolora-tion, but may be transparent, opaque, or colored.5.3 Finger cots and any dressing materials applied to themshall not liberate substances known to be toxic or otherwiseharmful under normal conditions of use. Any dressing orcompounding materials shall not have a deleterious e
10、ffect onthe rubber and shall be permitted by the Code of FederalRegulations, Title 21, Food and Drug Administration, Section177.2600 on Rubber Articles Intended for Repeated Use, thatlists materials safe for use as indirect food additives. Othermaterials may be used if their safety and efficacy have
11、 beenestablished previously.6. Performance6.1 Finger cots sampled in accordance with Section 7, shallmeet the following performance requirements:1This specification is under the jurisdiction ofASTM Committee D11 on Rubberand is the direct responsibility of Subcommittee D11.40 on Consumer RubberProdu
12、cts.Current edition approved Oct. 1, 2005. Published October 2005. Originallyapproved in 1979. Last previous edition approved in 2001 as D 3772 01.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandard
13、s volume information, refer to the standards Document Summary page onthe ASTM website.3Available from American National Standards Institute (ANSI), 25 W. 43rd St.,4th Floor, New York, NY 10036.4Available from the Superintendent of Documents, U. S. Government PrintingOffice, Washington, DC 20402.1Cop
14、yright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.6.1.1 Have consistent physical dimensions in accordancewith 8.2.2.6.1.2 Have acceptable physical property characteristics inaccordance with 8.3.6.1.3 Meet the inspection criteria as specifi
15、ed in 8.4.7. Sampling7.1 Finger cots shall be sampled and inspected in accor-dance with ISO 2859. The inspection levels and acceptablequality levels (AQL) shall conform to those specified in Table1, or as agreed between the purchaser and seller.8. Test Methods8.1 The following tests shall be conduct
16、ed to ensure therequirements of Section 9 are met as prescribed in Table 1.8.2 Design:8.2.1 RimThe open end of the finger cot shall terminate inan integral rim.8.2.2 Physical DimensionsThe length shall be 70 6 5mm. The thickness shall be 0.09 6 0.03 mm or as agreed uponby the manufacturer and end us
17、er. The width of the varioussizes shall be as follows: small, 24 6 2 mm; medium, 28 6 2mm; large, 30 6 2 mm; extra large, 34.5 6 2.5 mm.8.2.3 SamplingSampling shall be conducted according tothe inspection level and AQL specified in Table 1.8.2.4 TestingMeasure the length of the finger cot to thenear
18、est 1 mm. Measure the width to the nearest 0.5 mm at adistance at least 5 mm from the ends. Measure the thickness tothe nearest 0.002 mm at a distance about 5 mm from the openend, on specimens from which any lubricant has been removedwith water or isopropanol. The thickness micrometer shallconform t
19、o Test Methods D 412, except for the smaller-scalegraduations.8.2.5 The precision and bias for measuring dimensions areas specified in Practice D 3767.8.3 Physical Properties:8.3.1 Finger cots shall meet the minimum requirementsspecified in Table 2.8.3.2 SamplingSampling shall be conducted according
20、 tothe inspection level and AQL specified in Table 1.8.3.3 Testing:8.3.3.1 Condition finger cots to be subjected to acceleratedaging for 166 6 2hat706 2C, or for 22 6 0.3 h at 100 62C in accordance with Test Methods D 573 or D 865. Forreferee tests, condition for 166 6 2hat706 1C, inaccordance with
21、Test Method D 573.8.3.3.2 If Test Method D 573 is used, do not age finger cotsof different composition at the same time in the same oven.Age finger cots in original packages. Condition both aged andunaged finger cots at 23 6 2C for not less than 16 h beforetesting.8.3.3.3 Determine the ultimate elon
22、gation in accordancewith Test Methods D 412. Use ring specimens cut perpendicu-lar to the length direction of the finger cots with a die havingcutting edges spaced 20.0 6 0.1 mm apart and longer than thewidth of the cot. Cut the specimen near the center of the length,rejecting any specimen not cut w
23、ith a single impact of the die.Measure the specimen width of the flattened ring to the nearest0.5 mm and multiply by two to obtain the circumference of thering. Use a tester having a grip separation speed of 8.5 6 0.8mm/s, and roller grips at least 20 mm in width, about 5 mm indiameter, lubricated o
24、n the surface with castor oil or othereffective rubber lubricant.8.3.3.4 Calculate the ultimate elongation, E, in percent asfollows:E 5 100 2D 1 G 2 C!/C (1)where:C = circumference of specimen,D = distance between centers of roller grips at break, andG = circumference of one roller grip.8.3.4 The pr
25、ecision and bias of determining tensile strengthand ultimate elongation are as specified in Test Methods D 412.8.4 Inspection:8.4.1 Finger cots shall be inspected for tears, holes, embed-ded particles, foreign material, and adhering surfaces mani-fested by Type 1 cots failing to unroll easily and Ty
26、pe 2 cotsadhering to each other or restricting admission of the finger. Ifthe order specifies type of lubricant, inspect finger cots for thespecified type.8.4.2 Finger cots shall be sampled for inspection accordingto the inspection level and AQL specified in Table 2.9. Acceptance9.1 Finger cots will
27、 be considered to meet the performancerequirements when test results do not exceed the AQL pre-scribed in Table 2.9.2 Reinspection is permissible under the provisions ofISO 2859.10. Packaging and Package Marking10.1 Unless otherwise specified, packaging shall be inaccordance with the manufacturers c
28、ommercial practice toprotect finger cots during transportation and storage.10.2 Instructions shall be included on proper storage toassure long life, emphasizing the need for storage in a coolplace where mechanical damage is not likely and there is nocontact with oil-based antiseptics, phenols and th
29、eir deriva-tives, petroleum-based products, or other material harmful torubber.11. Keywords11.1 finger cots; natural rubber finger cotsTABLE 1 Performance RequirementsCharacteristic Related Defects Inspection Level AQLDimensions length, thickness, width S-2 4.0Physical Properties before aging, after
30、 acceleratedaging S-2 4.0Inspection tears, holes, embedded particles,foreign matter, adhering surfacesS-2 4.0TABLE 2 Physical PropertiesTensile Strength (MPa)Mean (Average) SpecimenOriginal 24 18Aged 20 18D 3772 01 (2005)2ASTM International takes no position respecting the validity of any patent rig
31、hts asserted in connection with any item mentionedin this standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the riskof infringement of such rights, are entirely their own responsibility.This standard is subject to revision at any
32、 time by the responsible technical committee and must be reviewed every five years andif not revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standardsand should be addressed to ASTM International Headquarters. Your comments wi
33、ll receive careful consideration at a meeting of theresponsible technical committee, which you may attend. If you feel that your comments have not received a fair hearing you shouldmake your views known to the ASTM Committee on Standards, at the address shown below.This standard is copyrighted by AS
34、TM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. Individual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org).D 3772 01 (2005)3
