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ASTM D6576-07

(Specification)

Standard Specification for Flexible Cellular Rubber Chemically Blown

Standard Specification for Flexible Cellular Rubber Chemically Blown

ABSTRACT
This specification establishes requirements for chemically blown cellular rubber. Cellular rubber may be classified into two types: Type I which is open cell or sponge rubber and Type II which is closed cell or expanded rubber. Both types are divided into three grades: Grade A which is oil-and flame-resistant, Grade B which has no requirements for oil ,flame resistance, or low temperature, and Grade C which is low-temperature resistant. Each type and class has been divided into three different conditions. Each condition is based on a specific range of firmness as expressed by compression deflection as follows: super soft, soft, soft-medium, medium, medium-firm, and firm conditions. Several tests shall be performed in order to determine the following physical properties of cellular rubber: compression deflection, low-temperature resistance, accelerated aging, recovery, flame resistance, shrinkage, water absorption, oil aging, and color.
SCOPE
1.1 This specification establishes requirements 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 for a particular product, the latter shall take precedence.
1.3 Unless specifically stated otherwise, by agreement between the purchaser and the supplier, all test methods shall be performed 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 for information only.
This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
1.5 There is no known ISO equivalent to this specification.Note 1
This specification was revised using the updated test methods and specifications in Specification D 1056 - 07.

General Information

Status
Historical
Publication Date
31-Aug-2007
ICS
83.100 - Cellular materials
Technical Committee
D20 - Plastics
Drafting Committee
D20.22 - Cellular Materials - Plastics and Elastomers
Current Stage
Ref Project

Relations

Replaces
ASTM D6576-00 - Standard Specification for Flexible Cellular Rubber Chemically Blown
Effective Date
01-Sep-2007
Replaced By
ASTM D6576-13 - Standard Specification for Flexible Cellular Rubber Chemically Blown
Effective Date
15-Nov-2013
Referred By
ASTM D3676-18 - Standard Specification for Rubber Cellular Cushion Used for Carpet or Rug Underlay
Effective Date
01-Sep-2007

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ASTM D6576-07 - Standard Specification for Flexible Cellular Rubber Chemically BlownASTM D6576-07 - Standard Specification for Flexible Cellular Rubber Chemically Blown
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ASTM D6576-07 - Standard Specification for Flexible Cellular Rubber Chemically Blown
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Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation:D6576 −07
StandardSpecification for
1
Flexible Cellular Rubber Chemically Blown
This standard is issued under the fixed designation D6576; the number immediately following the designation indicates the year of
original 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.
This standard has been approved for use by agencies of the Department of Defense.
1. Scope D1056 Specification for Flexible Cellular Materials—
Sponge or Expanded Rubber
1.1 This specification establishes requirements for chemi-
D3575 Test Methods for Flexible Cellular Materials Made
cally blown cellular rubber.
From Olefin Polymers
1.2 In the case of conflict between the provisions of this 3
2.2 SAE Standard:
specification and those of detailed specifications or test meth-
SAE J 1351-1993 Hot Odor Test for Insulation Materials
ods for a particular product, the latter shall take precedence. 4
2.3 Military Standards/Specifications:
MIL STD 105 Sampling Procedures and Tables for Inspec-
1.3 Unless specifically stated otherwise, by agreement be-
tween the purchaser and the supplier, all test methods shall be tion by Attributes
MIL STD 129 Marking for Shipment and Storage
performed in accordance with the test methods specified in this
specification. MIL STD 293 Visual Inspection Guide for Cellular Rubber
Items
1.4 The values stated in SI units are to be regarded as the
MIL R 6130C Standard Specification for Flexible Cellular
standard. The inch-pound units given in parentheses are for
Rubber Chemically Blown
information only.
4
2.4 Federal Standards/Specifications:
1.5 This standard does not purport to address all of the
PPP-B576 Box, Wood, Cleated, Veneer, Paper Overlaid
safety concerns, if any, associated with its use. It is the
PPP-B591 Box, Fiberboard, Wood-Cleated
responsibility of the user of this standard to establish appro-
PPP-B601 Box, Wood, Cleated Plywood
priate safety and health practices and determine the applica-
PPP-B621 Box, Wood, Nailed and Lock-Corner
bility of regulatory limitations prior to use.
PPP-B636 Box, Shipping, Fiberboard
1.6 There is no known ISO equivalent to this specification.
3. Terminology
NOTE 1—This specification was revised using the updated test methods
and specifications in Specification D1056 – 07. 3.1 For definitions of technical terms pertaining to cellular
flexible rubber used in this specification, refer to Terminology
2. Referenced Documents
D883.
2
2.1 ASTM Standards:
3.2 Definitions:
D297 Test Methods for Rubber Products—ChemicalAnaly-
3.2.1 cellular material—a generic term for materials con-
sis
taining many cells (either open or closed, or both) dispersed
D471 Test Method for Rubber Property—Effect of Liquids
throughout the mass.
D635 Test Method for Rate of Burning and/or Extent and
3.2.2 closed cell—a product whose cells are totally enclosed
Time of Burning of Plastics in a Horizontal Position
by its walls and hence not interconnecting with other cells.
D883 Terminology Relating to Plastics
3.2.3 open cell—a product whose cells are not totally
D1055 SpecificationsforFlexibleCellularMaterials—Latex
Foam enclosed by its walls and open to the surface, either directly or
by interconnecting with other cells.
1
This specification is under the jurisdiction of ASTM Committee D20 on
4. Classification
Plastics and is the direct responsibility of Subcommittee D20.22 on Cellular
Materials - Plastics and Elastomers.
4.1 Types—This specification covers two types of cellular
Current edition approved Sept. 1, 2007. Published October 2007. Originally
rubber designated as follows:
approved in 2000. Last previous edition approved in 2000 as D6576 - 00. DOI:
10.1520/D6576-07.
2 3
For referenced ASTM standards, visit the ASTM website, www.astm.org, or Available from Society of Automotive Engineers (SAE), 400 Commonwealth
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Dr., Warrendale, PA 15096-0001, http://www.sae.org.
4
Standards volume information, refer to the standard’s Document Summary page on AvailablefromStandardizationDocumentsOrderDesk,Bldg.4SectionD,700
the ASTM website. Robbins Ave., Philadelphia, PA 19111-5094, Attn: NPODS.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
D6576−07
4.1.1 Type I—Open cell (sponge rubber). 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
4.1.2 Type II—Closed cell (expanded rubber).
shall not be required to posses a skin or rind on either major
4.2 Grades—Both types are divided into three grades des-
surface.
ignated by the lettersA, B, an
...

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This test method establishes standard procedure for determining the tensile and tensile adhesion properties of rigid cellular plastics in the form of test specimens of standard shape under defined conditions of temperature, humidity, and testing machine speed. Tensile properties shall be measured using any of three types of specimens: Type A shall be the preferred specimen in those cases where enough sample material exists to form the necessary specimen; Type B shall be the preferred specimen when only smaller specimens are available, as in sandwich panels, etc.; Type C shall be the preferred specimen for the determination of tensile adhesive properties of a cellular plastic to a substrate as in a sandwich panel or the bonding strength of a cellular plastic to a single substrate. This test method requires the use of the following apparatuses: a constant-rate-of-crosshead-movement type testing machine; self-aligning type grips for holding test specimens; an extension indicator; and a lathe specimen cutter.
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ASTM D1621-16(2023)(Test Method)
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4.1 This test method provides information regarding the behavior of cellular materials under compressive loads. Test data is obtained, and from a complete load-deformation curve it is possible to compute the compressive stress at any load (such as compressive stress at proportional-limit load or compressive strength at maximum load) and to compute the effective modulus of elasticity.  
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ASTM D7252-22(Test Method)
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1.3 This test method is based on the fact that the traditional industry standard thickness for Indentation Force Deflection (IFD) is 100 mm [4 in.], and the traditional percent deflection for IFD acceptance and product planning is 25 %. With respect, then, to these traditional industry conventions, a 25 % deflection on a 100-mm [4-in.] cushion would be 25 mm [1 in.]. Thus, deflecting standard cushions (of proper 100 mm thickness) 25 mm [1 in.] provides a quick way to determine if the flexible polyurethane foam is within the specified grade range for 25 % IFD.  
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5.1 This test method is intended for use when measuring surface flammability of flexible cellular materials exposed to fire. The test method provides a laboratory test procedure for measuring and comparing the surface flammability of materials when exposed to a prescribed level of radiant heat energy. The test is conducted using specimens that are representative, to the extent possible, of the material or assembly being evaluated. For example, if an assembly is required to be tested, such specimens shall replicate the type and thickness of all the layers present in the assembly being evaluated.  
5.2 The rate at which flames will travel along surfaces depends upon the physical and thermal properties of the material, product, or assembly under test, the specimen mounting method and orientation, the type and level of fire or heat exposure, the availability of air, and properties of the surrounding enclosure. (1-6)4, 5  
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5.3.1 The pilot burner in this test method is different from the pilot burner in Test Method E162.  
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SCOPE
1.1 This is a fire test response standard.  
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1.5 Fire testing is inherently hazardous. Adequate safeguards for personnel and property shall be employed in conducting these tests.  
1.6 Specific information about hazards is given in Section 7.
Note 1: There is no known ISO equivalent to this standard.  
1.7 The values stated in SI units are to be regarded as the standard. The values stated in inch-pound units, in parentheses, are for information only and are approximations (see also IEEE/ASTM SI-10).  
1.8 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

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