1、Designation: D 3851 97 (Reapproved 2003)e1Standard Specification forUrethane Microcellular Shoe Soling Materials1This standard is issued under the fixed designation D 3851; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year o
2、f last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon (e) indicates an editorial change since the last revision or reapproval.e1NOTEEditorially added Test Method D 2240 for reference in March 2003.1. Scope*1.1 This specification covers urethane microcel
3、lular materi-als for shoe soling applications. It provides properties anddimensional requirements and test methods for specific prop-erties.1.2 SI units are to be regarded as the preferred units ofmeasurements for values. The inch-pound values in bracketscan be used if there is an agreement between
4、the contractualparties.NOTE 1There is no similar or equivalent ISO standard.2. Referenced Documents2.1 ASTM Standards:D 412 Test Methods for Vulcanized Rubber and Thermo-plastic Rubbers and Thermoplastic Elastomers Tension2D 624 Test Method for Tear Strength of ConventionalVulcanized Rubber and Ther
5、moplastic Elastomers2D 1052 Test Method for Measuring Rubber DeteriorationCut Growth Using Ross Flexing Apparatus2D 1938 Test Method for Tear Propagation Resistance ofPlastic Film and Thin Sheeting by a Single-Tear Method3D 2240 Test Method for Rubber PropertyDurometerHardness4D 3489 Test Methods fo
6、r RubberMicrocellular Urethane53. Classification3.1 This specification covers three grades of microcellularurethane materials that may be selected for use according toabrasion resistance, cut-growth resistance, and other physicalproperties. The grades are classified as Grade 1, Grade 2, andGrade 3.4
7、. Ordering Information4.1 Any product represented as complying with this speci-fication shall meet all the requirements listed herein for itsparticular classification.5. Physical Requirements5.1 The material shall conform to requirements for physicalproperties prescribed in Table 1.6. Test Methods6.
8、1 The physical tests shall be in accordance with TestMethod D 3489.6.2 Material ShrinkageAfter removal from the mold,allow the part to cool to room temperature. Measure the largestdimensions of the part and the mold at room temperature to thenearest 0.02 mm or 0.001 in. Calculate the percent change
9、asfollows:% change in length 5Lm2 LpLm3 100 (1)where:Lm= length of mold at room temperature, andLp= length of molded part at room temperature.NOTE 2An alternative method for determining material shrinkage isgiven in Annex A1.7. Inspection7.1 Inspection of the material shall be agreed upon inwriting
10、between the purchaser and the seller as part of thepurchase contract.7.2 Testing for conformance to requirements shall be donein accordance with this specification and Test Methods D 3489.1This specification is under the jurisdiction of ASTM Committee D20 onPlastics and is the direct responsibility
11、of Subcommittee D20.22 on CellularMaterialsPlastics and Elastomers.Current edition approved March 10, 2003. Published May 2003. Originallyapproved in 1980. Last previous edition approved in 1997 as D 3851 97.This revision includes the addition of an ISO equivalency statement and akeyword section. It
12、 also establishes SI units as the preferred units but allows for theuse of inch-pound units.2Annual Book of ASTM Standards, Vol 09.01.3Annual Book of ASTM Standards, Vol 08.02.4Annual Book of ASTM Standards, Vol 09.01.5Annual Book of ASTM Standards, Vol 09.02.1*A Summary of Changes section appears a
13、t the end of this standard.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.8. Retest and Rejection8.1 If any failure occurs, the materials may be retested toestablish conformity in accordance with agreement betweenthe purchaser and th
14、e seller.9. Packaging, Marking, and Labeling9.1 PackagingThe material shall be packed in standardcommercial containers, so constructed as to ensure acceptanceby common or other carriers for safe transportation at thelowest rate to the point of delivery, unless otherwise specifiedin the contract or o
15、rder.9.2 MarkingThe shipping container shall be marked withthe name, type, and quality of material in accordance with thecontract or order under which the shipment is made. Theshipping container shall also be marked with the name of themanufacturer and the contract or order number.9.3 LabelingIn ord
16、er that purchasers may identify prod-ucts complying with all requirements of this specification,producers choosing to produce such products in conformancewith this voluntary specification may include a statement inconjunction with their name and address on labels, invoices,sales literature, and the
17、like. The following statement issuggested.9.3.1 “This product conforms to all the requirements forGrade _ established in ASTM Standard SpecificationD 3851. Full responsibility for conformance of this productwith the standard is assumed by (name and address ofconverter or distributor).10. Keywords10.
18、1 microcellular; polyurethane; shoe soling; urethaneANNEX(Mandatory Information)A1. ALTERNATIVE METHOD FOR DETERMINING MATERIAL SHRINKAGEA1.1 ProcedureA1.1.1 Measure the length of the cavity of the mold to thenearest 0.5 mm or 0.02 in. Make the measurement with themold at room temperature.A1.1.2 Mol
19、d at least three sound test parts from the materialto be tested under such conditions of pressure, temperature,flow rates, time, etc., as the manufacturer and the purchasermay agree are suitable for the material.A1.1.3 After removal from the mold, allow the parts to coolto room temperature before be
20、ing measured. The period ofstorage for initial molding shrinkage shall be 2 6 0.25 h.Measure the length of each part to the nearest 0.5 mm or 0.02in. Measure the parts again not less than 20 nor more than 24h to obtain the “24-h shrinkage,” and again not less than 40 normore than 48 h after molding,
21、 in order to determine the “48-h”or “normal” mold shrinkage.A1.2 Calculations and ReportA1.2.1 Calculate the percent shrinkage by subtracting thedimension of the specimen from the corresponding dimensionof the mold cavity in which it was molded, multiply by 100,and divide the difference by the lengt
22、h of the mold cavity.A1.2.2 Repeat the initial, 24-h, and 48-h shrinkage ex-pressed in percent and each representing the mean of valuesobtained on three or more specimens.TABLE 1 Physical Property Requirements on Polyurethane Shoe SystemsPropertyGradeASTMMethod123DensityAAAD 3489Tensile strength, mi
23、n, MPa psi 4.9 700 3.5 500 2.8 400 D 412Ultimate elongation, min, % 300 275 250 D 412Tear, Die C, min, kN/m lbf/in. 22.0 125 22.0 125 17.5 100 D 624Tear, min, kN/m lbf/in. 11.5 65 7.0 40 4.4 25 D 1938Hardness, Shore A DurometerAAAD 2240Cut-growth resistance, minimum cycles at: D 105220F0F75F30 00075
24、 000150 00010 00030 00075 00010 00020 00050 000Shrinkage, min, % 1.0 1.5 1.5 6.2 and Annex A1Taber abrasion (wear index), H-18 wheel, 1000 g, 1000 cycles 100 200 300 D 3489AAs agreed upon between the purchaser and the seller.D 3851 97 (2003)e12SUMMARY OF CHANGESThis section identifies the location o
25、f selected changes to this specification. For the convenience of the user,Committee D20 has highlighted those changes that may impact the use of this specification. This section mayalso include descriptions of the changes or reasons for the changes, or both.D 2240 - 93 (2003)e1: (1) Reapproved with
26、editorial changes.ASTM International takes no position respecting the validity of any patent rights 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 o
27、f such rights, are entirely their own responsibility.This standard is subject to revision at any 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
28、additional standardsand should be addressed to ASTM International Headquarters. Your comments will 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 t
29、o the ASTM Committee on Standards, at the address shown below.This standard is copyrighted by ASTM 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 3851 97 (2003)e13
