1、Designation: D6576 07D6576 13Standard Specification forFlexible Cellular Rubber Chemically Blown1This standard is issued under the fixed designation D6576; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revision.
2、A number in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the U.S. Department of Defense.1. Scope Scope*1.1 This specification establishes requireme
3、nts for chemically blown cellular rubber.1.2 In the case of conflict between the provisions of this specification and those of detailed specifications or test methods fora particular product, the latter shall take precedence.1.3 Unless specifically stated otherwise, by agreement between the purchase
4、r and the supplier, all test methods shall beperformed in accordance with the test methods specified in this specification.1.4 The values stated in SI units are to be regarded as the standard. The inch-pound units given in parentheses are forinformation only.1.5 This standard does not purport to add
5、ress 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 health practices and determine the applicability of regulatorylimitations prior to use.1.6 There is no known ISO equivalent to this specification
6、.NOTE 1This specification was revised using the updated test methods and specifications in the latest version of Specification D1056 07. .2. Referenced Documents2.1 ASTM Standards:2D297 Test Methods for Rubber ProductsChemical AnalysisD471 Test Method for Rubber PropertyEffect of LiquidsD635 Test Me
7、thod for Rate of Burning and/or Extent and Time of Burning of Plastics in a Horizontal PositionD883 Terminology Relating to PlasticsD1055 Specifications for Flexible Cellular MaterialsLatex FoamD1056 Specification for Flexible Cellular MaterialsSponge or Expanded RubberD3575E177 Test Methods for Fle
8、xible Cellular Materials Made From Olefin PolymersPractice for Use of the Terms Precisionand Bias in ASTM Test MethodsE691 Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method2.2 SAE Standard:3SAE J 1351-1993 Hot Odor Test for Insulation Materials2.3 Military
9、Standards/Specifications:4MIL STD 105 Sampling Procedures and Tables for Inspection by AttributesMIL STD 129 Marking for Shipment and StorageMIL STD 293 Visual Inspection Guide for Cellular Rubber ItemsMIL R 6130C Standard Specification for Flexible Cellular Rubber Chemically Blown1 This specificati
10、on is under the jurisdiction of ASTM Committee D20 on Plastics and is the direct responsibility of Subcommittee D20.22 on Cellular Materials - Plasticsand Elastomers.Current edition approved Sept. 1, 2007Nov. 15, 2013. Published October 2007December 2013. Originally approved in 2000. Last previous e
11、dition approved in 20002007as D6576 - 00.D6576 - 07. DOI: 10.1520/D6576-07.10.1520/D6576-13.2 For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at serviceastm.org. For Annual Book of ASTM Standardsvolume information, refer to the standards Document Su
12、mmary page on the ASTM website.3 Available from Society of Automotive Engineers (SAE), 400 Commonwealth Dr., Warrendale, PA 15096-0001, http:/www.sae.org.4 Available from Standardization Documents Order Desk, Bldg. 4 Section D, 700 Robbins Ave., Philadelphia, PA 19111-5094, Attn: NPODS.This document
13、 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 as appr
14、opriate. In all cases only the current versionof the standard as published by ASTM is to be considered the official document.*A Summary of Changes section appears at the end of this standardCopyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United Sta
15、tes12.4 Federal Standards/Specifications:4PPP-B576 Box, Wood, Cleated, Veneer, Paper OverlaidPPP-B591 Box, Fiberboard, Wood-CleatedPPP-B601 Box, Wood, Cleated PlywoodPPP-B621 Box, Wood, Nailed and Lock-CornerPPP-B636 Box, Shipping, Fiberboard3. Terminology3.1 For definitions of technical terms perta
16、ining to cellular flexible rubber used in this specification, refer to Terminology D883.3.2 Definitions:3.2.1 cellular materiala generic term for materials containing many cells (either open or closed, or both) dispersed throughoutthe mass.3.2.2 closed cella product whose cells are totally enclosed
17、by its walls and hence not interconnecting with other cells.3.2.3 open cella product whose cells are not totally enclosed by its walls and open to the surface, either directly or byinterconnecting with other cells.4. Classification4.1 TypesThis specification covers two types of cellular rubber desig
18、nated as follows:4.1.1 Type IOpen cell (sponge rubber).4.1.2 Type IIClosed cell (expanded rubber).4.2 GradesBoth types are divided into three grades designated by the letters A, B, and C added to the roman numeral prefix.4.2.1 Grade AOil- and flame-resistant.4.2.2 Grade BNo requirements for oil, fla
19、me resistance, or low temperature.4.2.3 Grade CLow-temperature resistant (oil and flame resistance not required).4.3 ConditionsEach type and class has been divided into three different conditions. Each condition is based on a specific rangeof firmness as expressed by compression deflection as follow
20、s:4.3.4 ConditionSuper soft a compressiondeflection range of 0 to #14 kPa(0 to #2 psi)4.3.2 ConditionSoft a compressiondeflection range of14 to #35 kPa(2 to #5 psi)4.3.3 ConditionSoft-medium a compressiondeflection range of35 to #63 kPa(5 to #9 psi)4.3.4 ConditionMedium a compressiondeflection range
21、 of63 to #91 kPa( 9 to #13 psi)4.3.5 ConditionMedium-firm a compressiondeflection range of91 to #119 kPa(13 to #17 psi)4.3.6 ConditionFirm a compressiondeflection range of119 to #175 kPa(17 to #25 psi)4.3.1 ConditionSuper soft a compressiondeflection range of0 to #13.8 kPa(0 to #2 psi)4.3.2 Conditio
22、nSoft a compressiondeflection range of13.8 to #34.5 kPa(2 to #5 psi)4.3.3 ConditionSoft-medium a compressiondeflection range of34.5 to #62.1 kPa(5 to #9 psi)4.3.4 ConditionMedium a compressiondeflection range of62.1 to #89.6 kPa(9 to #13 psi)4.3.5 ConditionMedium-firm a compressiondeflection range o
23、f89.6 to #117.2 kPa(13 to #17 psi)4.3.6 ConditionFirm a compressiondeflection range of117.2 to #172.4 kPa(17 to #25 psi)5. Significance and Use5.1 This specification is a revision of MIL R 6130C retaining most of the MIL R 6130C material designations and propertyrequirements while conforming to ASTM
24、 form and style. It is intended to establish requirements for chemically blown cellularrubber used by government and industry, and is intended as a direct replacement for MIL R 6130C.6. Materials and Manufacture6.1 MaterialsThe materials shall be homogeneous. Except for the following production allo
25、wances:6.1.1 Tears and edge cracks that do not interfere with specified product yield.6.1.2 Depression and pock marks not exceeding 1 in.6.1.3 Splices and butt splices.D6576 1326.1.4 Laminating sheets to achieve thickness.6.2 The material shall not include the following:6.2.1 Cemented, bonded, shred
26、ded, or reprocessed cellular rubber.6.2.2 Grade A cellular rubber shall not contain natural rubber.6.3 FormChemically blown cellular rubber shall be furnished as sheets, rolls, or molded shapes as specified, and shall havea uniform cell structure, with thin skin or rind surfaces. Cut or split sheets
27、 void of skin or rind surfaces may are permitted to befurnished only for Type II material when specified.6.4 Skin or RindThe surface formed by contact with the mold shall be considered a skin or rind. It shall be of the samecompound, and vulcanized integrally with the cellular structure. Type I shal
28、l have skin or rind. It is acceptable for Type II mayto have or may not have skin or rind.6.5 Cut or Split Sheets (Type II Only)When two or more sheets are derived from one thick sheet, the cut or split sheets shallnot be required to possespossess a skin or rind on either major surface.6.6 Surfacing
29、Cellular rubber shall be backed or surfaced with fabric, adhesive, or other materials, when and as specified inthe contract or order or by applicable drawings.7. Physical Properties7.1 The various types and grades of cellular rubber shall conform to the physical properties listed in Table 1 together
30、 with anyadditional requirements indicated by suffix letters in the grade designations as described in Section 4 and Table 2.8. Tolerances on Dimensions8.1 Tolerances on dimensions of flexible cellular rubber materials are given in Table 3.8.2 Molded ShapesTolerance requirements for molded shapes sh
31、all be as specified in drawings, contracts, or by the procuringactivity.8.3 Sheets and RollsUnless otherwise specified, the tolerance requirements for thickness, lengths and width of sheets shall beas specified in Table 3.9. Test Methods9.1 Unless specifically stated otherwise, all test methods shal
32、l be in accordance with the test methods specified in Sections 10 18.9.2 Precision and BiasThe repeatabilitySee Section 19standard deviations for each test method has been determined. Thereproducibility of these test methods is being determined and will be available on or before March 2006NOTE 2One
33、laboratory tested one closed-cell, flame-resistant, non-oil resistant, 96-kg/m3, 14-35-kPa product as a representative sample. This samplewas used for shrinkage, recovery, and oil-resistance testing.10. Test Conditions10.1 Standard ConditionsUnless otherwise specified herein, conduct the test method
34、 at 23 6 2C (73.4 6 3.6F) and arelative humidity of 50 6 5 %10 %.10.2 Specimen ConditioningUnless otherwise specified, condition all test specimens at standard conditions for at least 22 hprior to testing.11. Compression Deflection11.1 Test in accordance with Sections 17 to 22 of Specification D1056
35、.12. Low-Temperature Flex Resistance12.1 Test in accordance with Sections 5657 to 6061 of Specification D1056. Exposure temperatures shall be in accordance withTable 4.13. Accelerated Aging13.1 Test in accordance with Sections 3435 to 41 of Specification D1056.14. Recovery14.1 Specimen SizeRound tes
36、t specimen shall be cut 41.361 mm (1.62560.04 in.) in diameter. Specimens taken from eithersheets or molded shapes shall have a minimum thickness of 6.4 mm (0.250 in.) and a maximum thickness of 28.6 mm (1.125 in.).D6576 133TABLE 1 Physical PropertiesAPropertyType IBasic Requirements(Open Cell)Type
37、IIBasic Requirements(Closed Cell)Test Method,SectionCompression deflection, kPa (psi), 25 %deflectionsuper soft 0 to #14 (0 to #2) 0 to #14 (0 to #2) 11Compression deflection, kPa(psi), 25 % deflectionsuper soft 0 to #13.8 (0 to #2) 0 to #13.8(0 to #2)11soft 14 to #35 (2 to #5) 14 to #35 (2 to #5)so
38、ft 13.8 to #34.5 (2 to #5) 13.8 to #34.5 (2 to #5)soft-medium 35 to #63(5 to #9)35 to #63(5 to #9)soft-medium 34.5 to #62.1(5 to #9)34.5 to#62.1(5 to #9)medium 63 to #91(9 to #13)63 to #91(9 to #13)medium 62.1 to #89.6(9 to #13)62.1 to #89.6(9 to #13)medium-firm 91 to #119(13 to #17) 91 to #119(13 t
39、o #17)medium-firm 89.6 to #117.2(13 to #17) 89.6 to #117.2(13 to #17)firm 119 to #175(17 to #25)119 to #175(17 to #25)firm 117.2 to #172.4(17 to #25)117.2 to #172.4(17 to #25)Low-temperature resistance, flex, 180 bend Grade A 40C (40F) pass pass 12Grade B 40C (40F) pass passGrade C 55C (67F) pass pa
40、ssAccelerated aging, % retention of original 25 %deflection after 7 days at 158Fall grades and conditions 20 %B 30 %B 13Recovery, min, %, after 50 % deflection all grades and conditions 90 60 14Flame resistance, max, s Grade A 30 30 15Grade B not required not requiredGrade C not required not require
41、dShrinkage, max, %, 7 days at 158F All grades and conditions not required 10 16Water Absorption, max, % all grades and conditions not required 10 % max for densities 10 lb/ft3 andunder5 % max for densities over 10 lb/ft317Oil aging, % change in volume, IRM Oil 902 Grade A 15 to +30 15 to +30 18Grade
42、 B not required not requiredGrade C not required not requiredColor all grades and conditions as manufactured unlessotherwise specifiedas manufactured unlessotherwise specifiedvisualAUnless otherwise specified, the basic requirements listed are for all types, grades, and conditions.BIf the super-soft
43、 grade after aging still falls within the compression deflection requirement of 0 13.8 kPa (0 2 psi), it shall be considered acceptable even though thechange from original was greater than 20 % or 30 %, respectively.TABLE 2 Optional Requirements Added by Suffix LettersPropertyType IOptional Requirem
44、ents(Open Cell)Type IIOptional Requirements(Closed Cell)Test MethodSectionSuffix H: Flexing, max, % set in accordancewith Specification D1055all grades and conditions 10 10 Appendix X1Suffix O: Odor in accordance with SAEJ-1351all grades and conditions rating to be determined rating to be determined
45、 Appendix X1Suffix W: Density in accordance with TestMethods D3575 or Specification D1056all grades and conditions density to be determined density to be determinedSuffix W: Density in accordance with Specifi-cation D1056all grades and conditions density to be determined density to be determinedSuff
46、ix Y: Sulfur Content, max, % by weight inaccordance with Test Methods D297all grades and conditions 0.60 0.60 Appendix X1D6576 134Skin on top face, or bottom face, or both, is allowed. Specimens shall be cut so that opposite edges are parallel. The thickness ofthe test specimens may is permitted to
47、vary, but shall be measured and stated in the report. Measure the thickness of each testspecimen to 0.0254 mm (0.001 in.).14.2 Compress the specimen to 50 % of the original thickness for a period of 46 h 6 30 minutes.14.3 Remeasure the thickness of each specimen 24 h 6 15 minutes after removal from
48、the compression apparatus.TABLE 3 Dimensions and Tolerances of Cellular Rubber Products for General ApplicationsSponge RubberForm Thickness Dimension,mm (in.) Thickness Tolerance,mm (in.) Length and Width Dimension,mm (in.)Length and WidthTolerance,mm (in.)Form Thickness Dimension,mm (in.) Thickness
49、 Tolerance,mm (in.) Length and Width Dimension,mm (in.)Length and WidthTolerance,mm (in.)Sheet and strip 3.2 (0.125) and under 0.4 (0.016) 152 (6) and under 1.6 (0.063)over 3.2 (0.125) to 12.7 (0.50), incl 0.8 (0.032) over 152 (6) to 457 (18), incl 3.2 (0.125)over 12.7 (0.50) 1.2 (0.047) over 457 (18) 0.5 %Molded or special shapes 6.4 (0.250) and under 0.8 (0.032) 6.4 (0.250) and under 0.8 (0.032)over 6.4 (0.250) to 76.2 (3), incl 1.6 (0.063) over 6.4 (0.250) to 76 (3), incl 1.6 (0.063)over 76 (3) to 457 (1
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