1、Designation: D 1668 97a (Reapproved 2006)Standard Specification forGlass Fabrics (Woven and Treated) for Roofing andWaterproofing1This standard is issued under the fixed designation D 1668; the number immediately following the designation indicates the year oforiginal adoption or, in the case of rev
2、ision, the year of 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.This standard has been approved for use by agencies of the Department of Defense. This specification replaces
3、Federal SpecificationHH-C-466.1. 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, orother usage as specified by the purchaser.1.2 The values stated in SI units are
4、 to be regarded as thestandard. The values given in parentheses are for informationonly.2. Referenced Documents2.1 ASTM Standards:2D 123 Terminology Relating to TextilesD 146 Test Methods for Sampling and Testing Bitumen-Saturated Felts and Woven Fabrics for Roofing and Water-proofingD 579 Specifica
5、tion for Greige Woven Glass FabricsD 1079 Terminology Relating to Roofing and Waterproof-ingD 3775 Test Method for Warp End Count and Filling PickCount of Woven FabricD 3776 Test Method for Mass Per Unit Area (Weight) ofFabric3. Terminology3.1 DefinitionsFor definitions of terms used in this speci-f
6、ication, refer to Terminology D 123 or D 1079.4. 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 pitche
7、s and coal tar pitch based compounds(Note 1).4.3 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
8、.NOTE 1In some instances the purchaser may specify 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
9、.5.2 In the process of manufacture, the fibers 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
10、woven in nominal widths of 0.91,1.83 and 2.74 m (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 spa
11、ce between each set (a set oftwo) of bunched warp threads 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 (patt
12、ern) in both the weaving andconstruction industry.5.4 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 0.91 m (36 in.). These widths can be furnished at themanufacturers option.1This spe
13、cification is under the jurisdiction of ASTM Committee D08 onRoofing and Waterproofing and is the direct responsibility of Subcommittee D08.04on Felts and Fabrics.Current edition approved Jan. 15, 2006. Published January 2006. Originallyapproved in 1959. Last previous edition approved in 1997 as D 1
14、668 97a.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 onthe ASTM website.1Copyright ASTM International, 100 Barr Harbor Drive,
15、 PO Box C700, West Conshohocken, PA 19428-2959, United States.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 immediatel
16、y reversed.6.2 Finished FabricThe finished fabric shall be capableof retaining 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
17、 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
18、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
19、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
20、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 D 146, paragraph 3.1.8.2 Strength of FabricStren
21、gth testing shall be in accor-dance with Test Methods D 146, 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 clampi
22、ng into position.8.3 Thread CountDetermine the thread count in accor-dance with Test Method D 3775.8.4 Organic Resin MassDetermine the net mass of or-ganic resin treatment of Type III fabric in accordance withSpecification D 579.8.5 The average net mass is determined by Test MethodD 3776.9. Inspecti
23、on9.1 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.TABLE 1 Requirements of Untreated Woven Glass Fabrics TypesStyl
24、eAScrimBLenoC20 by 20 Thread Type 20 by 10 Thread Type 10 by 10 Thread TypeAverage dry mass, g/m2(oz/yd2): 47 (1.4) 47 (1.4) 47 (1.4)Thread count per 25.4 mm (1 in.):Warp Threads:D20 6 2 150 1/0 20 6 2 150 1/0 20 6 2 150 1/0Filling Threads:E20 6 2 150 1/0 10 6 1751/016 1751/0A“Style” (that is, 20 by
25、 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 foruse as a quick, generic cross reference to the manufacturers own fabric numbers.BA scrim type fabric is an open weave (basket or screen) type pattern.CTh
26、e 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) toproduce mesh copenings double the size of the 20 by 20 weave patern. As a greige goods, it is a very stable (locked) weave which continues aft
27、er the applicationofthecoating materials.DWarp threads (yarns) run the length of the fabric. The warp thread count is measured across the width of the fabric and is expressed in number of threads per linealinch or per lineal millimetre (mm).EFill (woof) are the threads (yarns) that run at right angl
28、es (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 lineal inch or per lineal millimetre (mm).TABLE 2 Physical Requirements for Finished Glass FabricType I Type II Type IIIMin Max Min Max Min M
29、axWidth 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 (37.5)Length of roll (unless otherwise specified),linear m (yds)45.3 (49.5) 46.2 (50.5) 45.3 (49.5) 46.2 (50.5) 45.3 (49.5) 46.2 (50.5)Net fabric weight of roll, g/m2(lb/100 yd
30、2) 64.5 (13.0) 99.2 (20.0) 69.4 (14.0) 104.2 (21.0) 49.6 (10.0) 84.3 (17.0)Total average area coverage per roll withouta lap factor of 10 % is 41.8 m2(450 ft2)40.86 (439.31) 44.03 (473.44) 40.86 (439.31) 44.03 (473.44) 40.86 (439.31) 44.03 (473.44)Average net mass %, kg/m2(oz/yd2) 68 (2.0) 102 (3.0)
31、 68 (2.0) 102 (3.0) 54 (1.6) 88 (2.6)Moisture present in finished fabric, maximummass %A111Tensile strength at 21C 6 2C (70F 6 3.6F)measured in both directions, kN/m (lbf/in.)13.1 (75) 13.1 (75) 13.1 (75)AAt time of manufacture. Products with higher moisture content at time of installation may cause
32、 hot materials to foam, creating interply voids that may result in blisters.D 1668 97a (2006)210. Rejection 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 hav
33、e the right toinspect the rejected materials. The supplier and the purchasershall agree to the quantity 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 a
34、greed uponbetween the supplier and purchaser, each product package shallbe plainly marked with the suppliers name, the roll dimen-sions, the quantity, the style of fabric, the treatment type, andASTM designation; if applicable, the brand name would alsobe included.11.2 Cores and WrappingsUnless othe
35、rwise agreed uponby the supplier and the purchaser, the finished fabric shall be asfollows:11.2.1 Wound on paper cores having a minimum 1.6-mm(116-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 d
36、iameter witha total core length to fully accommodate the width of thefabric; total length of the core is not to exceed the sum of fabricwidth plus 50.8 mm (2 in.), and11.2.2 Banded with paper tape and/or wrapped in a mannerthat completely encircles and protects the roll to prevent anyslippage and un
37、rolling.11.3 Fabric Continuity Within the Roll:11.3.1 No roll is to contain more than two pieces. The totallength 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 shal
38、lbe 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, 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 oth
39、erwise separately packaged, are to be clearly marked as“SPLICED” with the number of spliced rolls contained therein.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
40、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 of such rights, are entirely their own responsibility.This standard is subject to revision at any time by the
41、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 additional standardsand should be addressed to ASTM International Headquarters. Your comments will receive ca
42、reful 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 to the ASTM Committee on Standards, at the address shown below.This standard is copyrighted by ASTM Internatio
43、nal, 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 1668 97a (2006)3
