1、Designation: D1668/D1668M 97a (Reapproved 2014)1Standard Specification forGlass Fabrics (Woven and Treated) for Roofing andWaterproofing1This standard is issued under the fixed designation D1668/D1668M; the number immediately following the designation indicates theyear of original adoption or, in th
2、e case of revision, the year of last revision. A number in parentheses indicates the year of lastreapproval. A superscript 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.This specifi
3、cation replaces Federal Specification HH-C-466.1NOTEUnits information was editorially corrected in May 2014.1. Scope1.1 This specification covers finished treated (coated)woven-glass fabrics coated with either asphalt, coal-tar pitch oran organic resin compatible with the roofing, waterproofing, oro
4、ther usage as specified by the purchaser.1.2 The values stated in either SI units or inch-pound unitsare to be regarded separately as standard. The values stated ineach system may not be exact equivalents; therefore, eachsystem shall be used independently of the other. Combiningvalues from the two s
5、ystems may result in non-conformancewith the standard.2. Referenced Documents2.1 ASTM Standards:2D123 Terminology Relating to TextilesD146 Test Methods for Sampling and Testing Bitumen-Saturated Felts and Woven Fabrics for Roofing andWaterproofingD579 Specification for Greige Woven Glass FabricsD107
6、9 Terminology Relating to Roofing and WaterproofingD3775 Test Method for Warp (End) and Filling (Pick) Countof Woven FabricsD3776 Test Methods for Mass Per Unit Area (Weight) ofFabric3. Terminology3.1 DefinitionsFor definitions of terms used in thisspecification, refer to Terminology D123 or D1079.4
7、. Classification of Fabric Treatments with GenerallyApplicable Usage4.1 Type I, Asphalt TreatedType I is suitable for use withall asphalts and asphalt based compounds.4.2 Type II, Coal Tar Pitch TreatedType II is suitable foruse with all coal tar pitches and coal tar pitch based compounds(Note 1).4.
8、3 Type III, Organic Resin TreatedThe purchaser andsupplier shall agree on an organic resin that is compatible withor is suitable for, or both, the plying liquid plying materialseither specified or to be used. This organic resin shall not bewater soluble.NOTE 1In some instances the purchaser may spec
9、ify the use of TypesI or II for systems using other than coal tar bitumens or asphalt.5. Materials and Manufacture5.1 The untreated (greige) scrim (open basket weave) orleno (locked weave) fabrics shall conform to the requirementsas specified in Table 1.5.2 In the process of manufacture, the fibers
10、of the untreatedglass fabric shall be thoroughly and uniformly coated usingequipment which, in combination, handles the fabric and usesa machine speed in a total process that will not injure or distortthe weave of the fabric.5.3 Glass fabric is usually woven in nominal widths of 0.91,1.83 and 2.74 m
11、 36, 72 and 108 in. by the weaving mills.Extra warp (the length of the fabric) threads are included in1.83 and 2.74-m 72 and 108-in. wide fabrics to obtainincremental fabric roll widths of 0.91 m 36 in. These extrawarp threads with a slitting space between each set (a set oftwo) of bunched warp thre
12、ads create a duplicate or “dupe”selvedge with a “brush” edge created by the cut fill threadsinstead of the usually wrapped fill threads seen in a smoothselvedge. This type of fabric selvedge edge is, and has been, anacceptable fabric design (pattern) in both the weaving andconstruction industry.1Thi
13、s specification is under the jurisdiction of ASTM Committee D08 onRoofing and Waterproofing and is the direct responsibility of Subcommittee D08.04on Felts, Fabrics and Bituminous Sheet Materials.Current edition approved May 1, 2014. Published May 2014. Originallyapproved in 1959. Last previous edit
14、ion approved in 2006 as D1668 97a (2006).DOI: 10.1520/D1668_D1668M-97AR14E01.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page ont
15、he ASTM website.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States15.4 Brush edge of the “dupe” selvedge is not to be includedin the measurement of the finished roll width.5.5 The purchaser may specify widths of more than or lessthan 0.9
16、1 m 36 in. These widths can be furnished at themanufacturers option.6. Physical Properties6.1 Coated FabricThe coated fabric shall conform to therequirements as specified in Table 2. The coated fabric shall notflake at 0C 32F when flexed 180 over 25 mm 1 in.outside diameter mandrel and then immediat
17、ely reversed.6.2 Finished FabricThe finished fabric shall be capable ofretaining its original shape and shall consist of a right angleweave set pattern without bunching either the warp or fillthreads when unrolled during normal handling. There shall beno sticking at temperatures of 10C 50F and above
18、 unlesssuch stickiness is required or specified, or both, by thepurchaser.6.3 Finished RollThe finished roll shall present a neatsquare edge with no loose warp threads. The fabric termina-tions shall be sealed using tape or the like and without the useof staples or heat.7. Workmanship, Finish and Ap
19、pearance7.1 Mesh of FabricThe fabric mesh shall be open an 85 %minimum average of the maximum mass of the roll with anallowable factor of 610 %. This openness of the fabric weaveis to permit a positive flow through of the successive moppingsor applications of the liquid plying materials.7.2 Finish o
20、f the FabricThe fabric finish shall be uni-formly free of tears, cracks, folds, ragged or untrue edges. If arelease compound is used to prevent sticking in the rolls, itmust be barely visible and not of a composition or amount thatwill interfere with adhesion or composition of the liquid plyingmater
21、ials.7.3 SelvageThe selvage of the fabric shall have a mini-mum number of warp threads (yarns) to comprise a width of 6mm 14 in. and a maximum of 13 mm 12 in.8. Sampling and Test Methods8.1 SamplingSampling shall be in accordance with TestMethods D146, paragraph 3.1.8.2 Strength of FabricStrength te
22、sting shall be in accor-dance with Test Methods D146, paragraph 13.2, modified toprevent the glass fabric from slipping from the jaws of thetension testing machine. The modification is to insert a thinstrip of soft gasket rubber between the fabric and the four jawsof the machine before clamping into
23、 position.8.3 Thread CountDetermine the thread count in accor-dance with Test Method D3775.TABLE 1 Requirements of Untreated Woven Glass Fabrics TypesStyleAScrimBLenoC20 by 20 Thread Type 20 by 10 Thread Type 10 by 10 Thread TypeAverage dry mass, g/m2oz/yd2: 47 1.4 47 1.4 47 1.4Thread count per 25.4
24、 mm 1 in.:Warp Threads:D20 2 150 1/0 20 2 150 1/0 20 2 150 1/0Filling Threads:E20 2 150 1/0 10 1 75 1/0 10 1 75 1/0A“Style” (that is, 20 by 10) as stated as a caption in Table 1 is a weave count of the threads (yarns) present in both the warp and the fill. “Style” is mentioned here for useas a quick
25、, generic cross reference to the manufacturers own fabric numbers.BA scrim type fabric is an open weave (basket or screen) type pattern.CThe style called “leno” has the same thread count as the 20 by 10. The change in the weave pattern is due to the doubling of the 150 1/0 warp threads (yarns) to pr
26、oducemesh copenings double the size of the 20 by 20 weave patern. As a greige goods, it is a very stable (locked) weave which continues after the application of the coatingmaterials.DWarp threads (yarns) run the length of the fabric. The warp thread count is measured across the width of the fabric a
27、nd is expressed in number of threads per lineal inchor per lineal millimetre (mm).EFill (woof) are the threads (yarns) that run at right angles (perpendicular) to the warp yarns of the fabric. The fill thread count is measured across the length of the fabricand is expressed in number of threads per
28、lineal inch or per lineal millimetre (mm).TABLE 2 Physical Requirements for Finished Glass FabricType I Type II Type IIIMin Max Min Max Min MaxWidth of roll (unless otherwise specified),mm in.901.0 35.5 952.0 37.5 901.0 35.5 952.0 37.5 901.0 35.5 952.0 37.5Length of roll (unless otherwise specified)
29、,linear m yd45.3 49.5 46.2 50.5 45.3 49.5 46.2 50.5 45.3 49.5 46.2 50.5Net fabric weight of roll, g/m2lb/100 yd2 64.5 13.0 99.2 20.0 69.4 14.0 104.2 21.0 49.6 10.0 84.3 17.0Total average area coverage per roll withouta lap factor of 10 % is 41.8 m2450 ft240.86 439.31 44.03 473.44 40.86 439.31 44.03
30、473.44 40.86 439.31 44.03 473.44Average net mass %, kg/m2oz/yd2 68 2.0 102 3.0 68 2.0 102 3.0 54 1.6 88 2.6Moisture present in finished fabric, maximummass %A111Tensile strength at 21C 2C 70F 3.6Fmeasured in both directions, kN/m lbf/in.13.1 75 13.1 75 13.1 75AAt time of manufacture. Products with h
31、igher moisture content at time of installation may cause hot materials to foam, creating interply voids that may result in blisters.D1668/D1668M 97a (2014)128.4 Organic Resin MassDetermine the net mass of or-ganic resin treatment of Type III fabric in accordance withSpecification D579.8.5 The averag
32、e net mass is determined by Test MethodD3776.9. Inspection9.1 InspectionInspection shall be in accordance with therequirements of this specification.9.2 Inspection AlternativesAlternative inspection require-ments shall be determined by and as agreed upon between thepurchaser and the supplier.10. Rej
33、ection and Resubmittal10.1 Failure to ConformFailure to conform to any of therequirements as stated in this specification constitutes groundsfor rejection.10.2 Rejection RedressThe supplier shall have the right toinspect the rejected materials. The supplier and the purchasershall agree to the quanti
34、ty of rolls deemed unacceptable. Thesupplier shall then have the right to submit the same number ofnew rolls as replacement.11. Packaging and Package Marking11.1 Packaging StandardsUnless otherwise agreed uponbetween the supplier and purchaser, each product package shallbe plainly marked with the su
35、ppliers name, the rolldimensions, the quantity, the style of fabric, the treatment type,and ASTM designation; if applicable, the brand name wouldalso be included.11.2 Cores and WrappingsUnless otherwise agreed uponby the supplier and the purchaser, the finished fabric shall be asfollows:11.2.1 Wound
36、 on paper cores having a minimum 1.6-mm116-in. wall with a maximum 3.2-mm 18-in. wall. Eachpaper core shall have a minimum 44.5-mm 134-in. insidediameter to a maximum 76.2-mm 3-in. inside diameter witha total core length to fully accommodate the width of thefabric; total length of the core is not to
37、 exceed the sum of fabricwidth plus 50.8 mm 2 in., and11.2.2 Banded with paper tape or wrapped in a manner thatcompletely encircles and protects the roll, or both, to preventany slippage and unrolling.11.3 Fabric Continuity Within the Roll:11.3.1 No roll is to contain more than two pieces. The total
38、length of fabric in such a roll is to be at least 450 mm 18 in.greater than the normal roll length. The box shall be marked“SPLICED.”11.3.2 All splices created during the weaving process shallbe marked as in 11.3.1.11.3.3 Any fill voids and areas of damaged warp threads areto be cut out of the roll,
39、 still maintaining the requirements of11.3.1.11.3.4 No roll lot (shipment) shall contain more thana5%quantity of spliced rolls.11.3.5 All cartons and packages within a carton, or whichare otherwise separately packaged, are to be clearly marked as“SPLICED” with the number of spliced rolls contained t
40、herein.12. Keywords12.1 glass fabrics: woven, treated, scrim, leno and greige;roofing; waterproofingASTM 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 dete
41、rmination 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, either reapproved or
42、 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 attend. If you feel tha
43、t 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. Individual reprints
44、(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 secured from the ASTM website (www.astm.org/COPYRIGHT/).D1668/D1668M 97a (2014)13
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