1、Designation: C686 90 (Reapproved 2011)1C686 17Standard Test Method forParting Strength of Mineral Fiber Batt- and Blanket-TypeInsulation1This standard is issued under the fixed designation C686; the number immediately following the designation indicates the year oforiginal adoption or, in the case o
2、f revision, the year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.1 NOTE1.2 was editorially inserted in October 2011.1. Scope1.1 This test method covers evaluation of stren
3、gth in tension on mineral fiber batt- and blanket-type insulation products. It isuseful for determining the comparative tensile properties of these products, specimens of which cannot be held by the moreconventional clamp-type grips. This is a quality control method, and the results shouldshall not
4、be used for design purposes. It isnot normally used suitable for board-type products.1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematicalconversions to SI units that are provided for information only and are not considered standar
5、d.1.3 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 health practices and determine the applicability of regulatorylimitations prior to use.1.4 This intern
6、ational standard was developed in accordance with internationally recognized principles on standardizationestablished in the Decision on Principles for the Development of International Standards, Guides and Recommendations issuedby the World Trade Organization Technical Barriers to Trade (TBT) Commi
7、ttee.2. Referenced Documents2.1 ASTM Standards:2C167 Test Methods for Thickness and Density of Blanket or Batt Thermal InsulationsE171 Practice for Conditioning and Testing Flexible Barrier PackagingE691 Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method3. S
8、ignificance and Use3.1 Tensile strength is a fundamental property associated with mineral fiber manufacture since it is influenced by the type offiber, the deposition of fiber, the type and the amount of bonding agent, and the method of curing the resin to form a bondedinsulation product.The test is
9、 an indication of product integrity and the ability of the product to be successfully handled and appliedin the field.4. Apparatus4.1 Constant Rate of Traverse Tension Test Unit of 50-lbf (223-N) capacity calibrated in increments of 0.1 lbf (0.4 N) and havinga moving head speed of 12 in. (305 mm)/mi
10、n or equivalent (see Fig. 1).4.2 Post-Type Grips with 1-in. (25.4-mm) diameter rods (see Fig. 2).4.3 Die for cutting specimens (see Fig. 3). The O-ring specimen dimensions are 3 by 4.75 in. (76 by 120.6 mm) in outsidediameter, and 1 by 2.75 in. (25 by 69.8 mm) in inside diameter (see Fig. 4).4.4 Bal
11、ance to weigh to an accuracy of 0.01 g.1 This test method is under the jurisdiction of ASTM Committee C16 on Thermal Insulation and is the direct responsibility of Subcommittee C16.32 on MechanicalProperties.Current edition approved Oct. 1, 2011May 1, 2017. Published October 2011May 2017. Originally
12、 published as approved in 1971. Last previous edition approved in20072011 as C686 90 (2007).(2011)1. DOI: 10.1520/C0686-90R11E01.10.1520/C0686-17.2 For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at serviceastm.org. For Annual Book of ASTM Standards
13、volume information, refer to the standards Document Summary page on the ASTM website.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 a
14、dequately depict all changes 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 Consho
15、hocken, PA 19428-2959. United States15. Test Specimen5.1 The test specimen shall consist of the entire O-ring cut from the full thickness of the product to be tested.5.2 Specimens shall not be cut from a product that varies in thickness 65 % from normal when tested in accordance with TestMethod C167
16、.5.3 No specimen shall be tested that exhibits any obvious damage in the insulation or that shows delamination within theinsulation thickness.6. Conditioning6.1 Condition the specimens for 1 h in a room maintained at atmospheric conditions of 73.4 6 1.8F (23 6 1C) and 50 6 2 %relative humidity in ac
17、cordance with Specification E171.FIG. 1 Tension Test UnitUnitsFIG. 2 Post-Type GripsC686 1727. Procedure7.1 Weigh each specimen to the nearest 0.01 g and record the weight.7.2 Attach the post-type grips to the tension test unit and align the grips in the vertical plane.7.3 Adjust the speed of the mo
18、ving head to 12 in. (305 mm)/min.7.4 Set the stops of the moving head until the grips are approximately 14 in. (6.3 mm) apart in the starting position.7.5 Place the specimen on the post-type grip (higher density side first if it is evident that such exists) so that both posts are withinthe oblong ho
19、le of the specimen. The high density side of the specimen shall be in contact with the post shield.7.6 Apply the load; read and record the maximum load to failure to the nearest 0.1 lbf (0.4 N).7.7 Test ten specimens each cut in the machine and cross-machine directions. If the machine direction is n
20、ot readilydeterminable, refer to the longest dimension of the sample to be tested as lengthwise and call the shortest dimension crosswise.FIG. 3 Specimen Die CutterFIG. 4 Test SpecimenC686 1738. Calculation8.1 Calculate the parting strength, S, in grams per gram as follows:S 5L 3453.59!/W (1)where:L
21、 = breaking load, lbf, andW = weight of specimen, g.9. Report9.1 The report shall include the following:9.1.1 Thickness and density of the product being reported in accordance with Test Method C167,9.1.2 Weight and load at failure of each specimen,9.1.3 Calculated parting strength for each specimen,
22、9.1.4 Total number of specimens tested in both the machine and cross-machine direction, and9.1.5 Average of the parting strength in the machine and cross-machine direction.10. Precision and Bias310.1 PrecisionAn interlaboratory round robin involving four laboratories and three specimens was conducte
23、d in 1988.Specimens were tested in both machine and crossmachine directions. The three mineral fiber samples were typical of currentproduction. Table 1 gives the results of the round robin which were analyzed using Practice E691 guidelines.10.2 BiasSince there are no reference materials available fo
24、r this test method, it is not possible to estimate bias.11. Keywords11.1 insulation; physical strength; tensile strengthASTM 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 express
25、ly 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 committee and must be reviewed every five years andif not revised,
26、either reapproved or withdrawn.Your comments are invited either for revision of this standard or for 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 atte
27、nd. If you feel that your comments have not received a fair hearing you shouldmake your views known to 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. I
28、ndividual 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). Permission rights to photocopy the standard may also be secur
29、ed from the Copyright Clearance Center, 222Rosewood Drive, Danvers, MA 01923, Tel: (978) 646-2600; http:/ Supporting data have been filed at ASTM International Headquarters and may be obtained by requesting Research Report RR:16-1013.TABLE 1 Interlaboratory PrecisionAMaterialMachine Direction Cross-
30、Machine DirectionPartingStrength, lb/g S CV,% LSDPartingStrength, lb/g S CV,% LSDA 0.670 0.032 4.77 0.506 0.539 0.042 7.79 0.579B 1.468 0.064 4.36 0.715 1.367 0.104 7.61 0.912C 0.383 0.024 6.27 0.438 0.285 0.007 2.46 2.236A The symbols used represent the following:S = standard deviation,CV = percent coefficient of variation (S 100 mean), andLSD = least significant difference between two individual test results based on a 95 % confidence level 522S.C686 174
