1、Designation: D3772 01 (Reapproved 2010)D3772 15Standard Specification forNaturalIndustrial Rubber Finger Cots1This standard is issued under the fixed designation D3772; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of la
2、st 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 specification covers the requirements for finger cots used in industrial applications which are made from natural r
3、ubberlatex. latex or a synthetic nitrile polymer. The purpose of this specification is to obtain consistent performance among productsproduced in various locations or at various times in the same location.1.2 This specification does not cover the safe and proper use of finger cots or products of spe
4、cial construction for special use.1.3 The values stated in SI units are to be regarded as the standard.1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibilityof the user of this standard to establish appropriate safety and h
5、ealth practices and determine the applicability of regulatorylimitations prior to use.2. Referenced Documents2.1 ASTM Standards:2D412 Test Methods for Vulcanized Rubber and Thermoplastic ElastomersTensionD573 Test Method for RubberDeterioration in an Air OvenD865 Test Method for RubberDeterioration
6、by Heating in Air (Test Tube Enclosure)D1076 Specification for RubberConcentrated, Ammonia Preserved, Creamed, and Centrifuged Natural LatexD3767 Practice for RubberMeasurement of Dimensions2.2 Other Documents:ISO 2859 Sampling Procedures and Tables for Inspection by Attributes3Code of Federal Regul
7、ations, Title 21Food and Drug Administration, Part 17743. Classification3.1 Types:3.1.1 Type 1Rolled.1Natural Rubber Latex.3.1.2 Type 2Flat.2Synthetic Nitrile Polymer.3.2 SizesThe sizes covered are small, medium, large, and extra large.extra large, and XXL.4. Ordering Information4.1 Orders for mater
8、ial under this specification shall include the following information:4.1.1 Reference to this ASTM designation (D3772) and year 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 conforming
9、 to Specification D1076. or a synthetic nitrile polymer compoundthat meets the requirements in this specification.1 This specification is under the jurisdiction of ASTM Committee D11 on Rubber and is the direct responsibility of Subcommittee D11.40 on Consumer Rubber Products.Current edition approve
10、d May 1, 2010July 15, 2015. Published September 2010September 2015. Originally approved in 1979. Last previous edition approved in 20052010as D3772 01 (2005).(2010). DOI: 10.1520/D3772-01R10.10.1520/D3772-15.2 For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer
11、 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 American National Standards Institute (ANSI), 25 W. 43rd St., 4th Floor, New York, NY 10036.4 Available from the Superintendent of Docum
12、ents, U. S. Government Printing Office, Washington, DC 20402.This document 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 cha
13、nges accurately, ASTM recommends that users consult prior editions as 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. U
14、nited States15.2 Finger cots shall be free of embedded grit or discoloration, but may be transparent, opaque, or colored.5.3 Finger cots and any dressing materials applied to them shall not liberate substances known to be toxic or otherwise harmfulunder normal conditions of use.Any dressing or compo
15、unding materials shall not have a deleterious effect on the rubber and shallbe permitted by the Code of Federal Regulations, Title 21, Food and Drug Administration, Section 177.2600 on Rubber ArticlesIntended for Repeated Use, that lists materials safe for use as indirect food additives. Other mater
16、ials may be used if their safetyand efficacy have been established previously.6. Performance6.1 Finger cots sampled in accordance with Section 7, shall meet the following performance requirements:6.1.1 Have consistent physical dimensions in accordance with 8.2.2.6.1.2 Have acceptable physical proper
17、ty characteristics in accordance with 8.3.6.1.3 Meet the inspection criteria as specified in 8.4.7. Sampling7.1 Finger cots shall be sampled and inspected in accordance with ISO 2859. The inspection levels and acceptable quality levels(AQL) shall conform to those specified in Table 1, or as agreed b
18、etween the purchaser and seller.8. Test Methods8.1 The following tests shall be conducted to ensure the requirements 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 in an integral rim.8.2.2 Physical DimensionsThe length shall be 70 6 5
19、 mm. The single wall thickness shall be 0.09 6 0.03 mm or as agreedupon by the manufacturer and end user. The width when laid flat of the various sizes shall be as follows: small, 24 6 2 mm;medium, 28 6 2 mm; large, 30 6 2 mm; extra large, 34.5 6 2.5 mm; XXL, 36.5 6 2.5 mm.8.2.3 SamplingSampling sha
20、ll be conducted according to the inspection level and AQL specified in Table 1.8.2.4 TestingMeasure the length of the finger cot to the nearest 1 mm. Measure the width to the nearest 0.5 mm at a distanceat least 5 mm from the ends. Measure the thickness to the nearest 0.0020.01 mm at a distance abou
21、t 5 mm from the open end, onspecimens from which any lubricant has been removed with water or isopropanol. The thickness micrometer shall conform to TestMethods D412, except for the smaller-scale graduations.8.2.5 The precision and bias for measuring dimensions are as specified in Practice D3767.8.3
22、 Physical Properties:8.3.1 Finger cots shall meet the minimum requirements specified in Table 2.8.3.2 SamplingSampling shall be conducted according to the inspection level and AQL specified in Table 1.8.3.3 Testing:8.3.3.1 Condition finger cots to be subjected to accelerated aging for 166 6 2 h at 7
23、0 6 2C, or for 22 6 0.3 h at 100 6 2Cin accordance with Test Methods D573 or D865. For referee tests, condition for 166 6 2 h at 70 6 1C, in accordance with TestMethod D573.8.3.3.2 If Test Method D573 is used, do not age finger cots of different composition at the same time in the same oven. Agefing
24、er cots in original packages. Condition both aged and unaged finger cots at 23 6 2C for not less than 16 h before testing.8.3.3.3 Determine the ultimate elongation in accordance with Test Methods D412. Use ring specimens cut perpendicular to thelength direction of the finger cots with a die having c
25、utting edges spaced 20.0 6 0.1 mm apart and longer than the width of thecot. Cut the specimen near the center of the length, rejecting any specimen not cut with a single impact of the die. Measure thespecimen width of the flattened ring to the nearest 0.5 mm and multiply by two to obtain the circumf
26、erence of the ring. Use a testerhaving a grip separation speed of 8.5 6 0.8 mm/s, and roller grips at least 20 mm in width, about 5 mm in diameter, lubricatedon the surface with castor oil or other effective rubber lubricant.8.3.3.4 Calculate the ultimate elongation, E, in percent as follows:E 5100
27、2D1G 2C!/C (1)TABLE 1 Performance RequirementsCharacteristic Related Defects Inspection Level AQLDimensions length, thickness, width S-2 4.0Physical Properties before aging, after acceleratedaging S-2 4.0Inspection tears, holes, embedded particles,foreign matter, adhering surfacesS-2 4.0Inspection t
28、ears, holes, embedded particles,foreign matter, adhering surfacesS-4 4.0D3772 152where:C = circumference of specimen,D = distance between centers of roller grips at break, andG = circumference of one roller grip.8.3.4 The precision and bias of determining tensile strength and ultimate elongation are
29、 as specified in Test Methods D412.8.4 Inspection:8.4.1 Finger cots shall be inspected for tears, holes, embedded particles, foreign material, and adhering surfaces manifested byType 1 cots failing to unroll easily andType 2 cots adhering to each other or restricting admission of the finger. If the
30、order specifiestype of lubricant, inspect finger cots for the specified type.8.4.2 Finger cots shall be sampled for inspection according to the inspection level and AQL specified in Table 21.9. Acceptance9.1 Finger cots will be considered to meet the performance requirements when test results do not
31、 exceed the AQL tensileproperties prescribed in Table 2 and the dimensions as listed in 8.2.2 and 8.2.4.9.2 Reinspection is permissible under the provisions of ISO 2859.10. Packaging and Package Marking10.1 Unless otherwise specified, packaging shall be in accordance with the manufacturers commercia
32、l practice to protect fingercots during transportation and storage.10.2 Instructions shall be included on proper storage to assure long life, emphasizing the need for storage in a cool place wheremechanical damage is not likely and there is no contact with oil-based antiseptics, phenols and their de
33、rivatives, petroleum-basedproducts, or other material harmful to rubber.11. Keywords11.1 industrial finger cots; natural rubber; natural rubber synthetic nitrile polymer finger cotsASTM International takes no position respecting the validity of any patent rights asserted in connection with any item
34、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 time by the responsible technical commit
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37、O 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).
38、Permission rights to photocopy the standard may also be secured from the Copyright Clearance Center, 222Rosewood Drive, Danvers, MA 01923, Tel: (978) 646-2600; http:/ 2 Physical PropertiesTensile Strength(MPa)Mean (Average) SpecimenOriginal 24 18Aged 20 18TABLE 2 Physical PropertiesType 1-Tensile Strengthof Natural RubberType 2-Tensile Strengthof NitrileMean (Average MPa) Specimen Mean (Average MPa) SpecimenOriginal 24 18 14 8Aged 20 18 10 8D3772 153
