ASTM_D_1564_-_71e1_scan.pdf

Designation:D 1564-71c Standard Methods of Testing SLAB FLEXIBLE URETHANE FOAM1 This Standard is issued under the fixed designation D 1564;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.These methods were prepared jointly by the American Society for Testing and Materials and The Society of the Plastics Industry.NOTETable l was editorically deleted in February 1972.1.Scope 1.1 These methods apply to slab flexible cellular foams known as urethane foam.Ure-thane foam may be generally defined as an expanded cellular product produced by the interaction of active hydrogen compounds,wa-ter,and isocyanates.NOTE 1These methods have been developed primarily for slab foam.Tests for molded foam are covered in ASTM Methods D 2406,Testing Molded Flexible Urethane Foam.2 1.2 This document covers test procedures only.The numerical specifications will be developed as separate documents by appro-priate groups based on end use,such as auto-motive,etc.1.3 Unless specifically stated otherwise,between the vendor and the purchaser,all tests shall be made in accordance with the methods specified in Sections 5 to 101 which include test procedures for the following:Sections Basic Tests:Steam Autoclave Test 5 to 11 Constant Deflection Compression Set 12 to 18 Test Load Deflection Tests Method A,Indentation(to specified 19 to 25 deflections)Method B,Indentation(to specified 26 to 31 loads)Air Flow Test 32 to 38 Suffix Tests:Compression Load Deflection Test 39 to 44(Suffix D)Dry Heat Test(Suffix A)45 to 51 Fatigue Test(Suffix H)52 to 68 Sections Density Test(Suffix W)69 to 73 Tear Resistance Test(Suffix G)74 to 80 Tension Test(Suffix T)81 to 88 Resilience(Ball Rebound)Test(Suffix 89 to 94 R)2.Test Conditions 2.1 Tests shall be conducted under known conditions of temperature and humidity or as specified in the individual test procedure.After preflexing in cases of dispute,the tests shall be made at a temperature of 23 1.1 C(73.4 2 F)and in an atmosphere of 50 2 percent relative humidity.The product shall be conditioned,undetected,and un-distorted at the temperature and humidity of test for at least 12 h before being tested.2.2 It is recommended for referee pur-poses that all tests shall be performed 96 h or more after the foam has been manufac-tured.3.Sampling 3.1 When possible,the completed manu-factured product shall be used for the test specified.Representative samples of the lot being examined shall be selected at random as required.3.2 When it is necessary or advisable to 1 These methods are under the jurisdiction of ASTM Committee D-ll on Rubber and Rubber-Like Materials and is the direct responsibility of Subcommittee D-l 1.33 on Flexible Cellular Materials.Current edition effective April 16,1971.Originally is-sued 1958.Replaces D 1564-69.2 Annual Book of ASTM Standards,Part 28.714 NOTICE:This standard has either been superseded and replaced by a new version or withdrawnContact ASTM International(www.astm.org)for the lastest informationD 1564 obtain specimens from the article,as in those cases where the entire sample is not required or adaptable for testing,the method of cut-ting and the exact position from which speci-mens are to be taken shall be specified.The density and the state of cure may vary in dif-ferent parts of the finished product,espe-cially if the article is of complicated shape or of varying thickness and these factors affect the physical properties of the specimens.Also,the density is affected by the number of cut surfaces as opposed to the number of skin-covered surfaces on the specimen.If a test specimen is die cut,sufficient time should be allowed to complete recovery of the thick-ness across the full width of the specimen.3.3 When the finished product does not lend itself to testing or to the taking of speci-mens because of complicated shape,small size,metal or fabric inserts,adhesion to metal,or other reasons,test slabs as agreed upon between the manufacturer and the pur-chaser shall be prepared.3.4 When differences due to the difficulty in obtaining suitable specimens from the fin-ished part arise,the manufacturer and the purchaser may agree on acceptable devia-tions.This can be done by comparing the re-sults of standard specimens and those ob-tained on actual parts.4.Measurements of Test Specimens 4.1 The length and width shall be meas-ured with a scale or tape.Care shall be taken not to distort the foam.4.2 Thickness up to and including 25 mm(1 in.)shall be measured using a dial-type gage with a minimum foot area of 65 mm2(I in.2).Pressure of the dial foot shall be held to 140 35 N/m2(0.028 0.007 psi)(Note 2).Thicknesses over 25 mm(1 in.)may be measured with a dial gage,a sliding caliper gage,or as specified in 4.1.When a sliding caliper gage is employed,the gage setting shall be made with the gage out of contact with the foam.The specimen shall be pa