1、Designation: D3374/D3374M 14Standard Specification forVinyl-Coated Glass Yarns1This standard is issued under the fixed designation D3374/D3374M; the number immediately following the designation indicates theyear of original adoption or, in the case of revision, the year of last revision. A number in
2、 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.1. Scope1.1 This specification covers vinyl-coated glass yarns.These y
3、arns are manufactured in two basic classes. Theseclasses have been established that when properly woven intoscreening, satisfactory strength, durability, and insect protec-tion are obtained. The two classes are as follows:1.1.1 Class 1Nominal thickness 0.292 mm 0.0115 in.1.1.2 Class 2Nominal thickne
4、ss 0.330 mm 0.0130 in.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 systems may result i
5、n non-conformancewith the standard.1.3 The following precautionary statement pertains only tothe test method portions, Sections 1221, of this specification.This standard does not purport to address all of the safetyconcerns, if any, associated with its use. It is the responsibilityof the user of thi
6、s standard to establish appropriate safety andhealth practices and determine the applicability of regulatorylimitations prior to use.2. Referenced Documents2.1 ASTM Standards:2D123 Terminology Relating to TextilesD578 Specification for Glass Fiber StrandsD1907 Test Method for Linear Density of Yarn
7、(Yarn Num-ber) by the Skein MethodD2256 Test Method for Tensile Properties of Yarns by theSingle-Strand MethodD4329 Practice for Fluorescent Ultraviolet (UV) Lamp Ap-paratus Exposure of PlasticsD4963 Test Method for Ignition Loss of Glass Strands andFabricsD7018 Terminology Relating to Glass Fiber a
8、nd Its Products2.2 ANSI/ASQC Standards:ANSI/ASQC Z1.4 Sampling Procedures for Inspection byAttributes3ANSI/ASQC Z1.9 Sampling Procedures and Tables for In-spection by Variables for Percent Nonconforming32.3 Federal Standard:CCC-D-950 Specification, Dyeing and After Treating Pro-cesses for Cotton Clo
9、ths42.4 AATCC Standard:Evaluation Procedure 1, Gray Scale for Color Change53. Terminology3.1 Definitions:3.1.1 For all terminology under the jurisdiction of Subcom-mittee D13.18, refer to Terminology D7018.3.1.1.1 The following terms are relevant to this standard:moisture equilibrium, vinyl-coated g
10、lass yarn.3.1.2 For terminology of other textile terms used in thisspecification, refer to Terminology D123.4. Sampling and Number of Specimens4.1 Lot SampleAs a lot sample for acceptance testing, takeat random the number of yarn packages directed in anapplicable material specification or other agre
11、ement betweenthe purchaser and the supplier. Consider yarn packages to bethe primary sampling unit. In the absence of such agreement,proceed as follows:4.1.1 Yarn Number, Ignition Loss, and Breaking ForceTake the number of yarn packages specified in ANSI/ASQZZ1.9 using the count of yarn packages in
12、the lot as a measureof the lot size.1This specification is under the jurisdiction of ASTM Committee D13 onTextiles and is the direct responsibility of Subcommittee D13.18 on Glass Fiber andits Products.Current edition approved Feb. 1, 2014. Published March 2014. Originallyapproved in 1975. Last prev
13、ious edition approved in 2007 as D3374 07. DOI:10.1520/D3374-14.2For 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 websi
14、te.3Available from American National Standards Institute, 11 W. 42nd St., 13thFloor, New York, NY 10036.4Available from General Services Administration, Specification and ConsumerInformation Distribution Section (WFSIS), Washington Navy Yard, Bldg. 197,Washington, DC 20407.5Available from American A
15、ssociation of Textile Chemists and Colorists, P.O.Box 12215, Research Triangle Park, NC 27709.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States14.1.2 Color and WorkmanshipTake the number of yarnpackages specified in ANSI/ASQZ Z1.4 using
16、 the count ofyarn packages in the lot as a measure of the lot size.4.1.3 Color Stability to Accelerated WeatheringUse theyarn packages taken as a lot sample for strength, and yarnnumber as the lot sample for color stability to acceleratedweathering.NOTE 1An adequate specification or other agreement
17、between thepurchaser and the supplier requires taking into account the variabilitybetween shipping cartons, yarn packages, yarn within a shipping carton,and test specimens from a yarn package to produce a sampling plan withmeaningful producers risk, consumers risk, acceptable quality level, andlimit
18、ing quality level.4.2 Laboratory SampleAs a laboratory sample for accep-tance testing, proceed as follows:4.2.1 Yarn Number, Ignition Loss, Breaking Force, Color,and WorkmanshipUse the lot sampling units as laboratorysampling units.4.2.2 Color Stability to Accelerated Weathering and Low-Temperature
19、FlexibilityUse every fifth yarn package in thelot sample for breaking force, and yarn number as the labora-tory sampling units. For small lots, take at least one yarnpackage as a laboratory sampling unit.4.3 Test SpecimensProceed as follows:4.3.1 Yarn Number, Ignition Loss, and Breaking ForceTake th
20、e number of specimens per laboratory sampling unitspecified in the applicable test method. Evaluate the results oftesting using ANSI/ASQ Z1.9, Inspection Level IV, normalinspection, and an acceptable quality level of 1.5 %.4.3.2 Color and WorkmanshipUse the yarn packages inthe lot sample as the spec
21、imens. Evaluate the results ofinspecting the specimens using ANSI/ASQZ Z1.4, InspectionLevel II, normal inspection, and an acceptable quality level of1.5 %.4.3.3 Color Stability to Accelerated WeatheringTake thenumber of specimens per laboratory sampling unit specified inthe test methods.REQUIREMENT
22、S5. Material5.1 Input YarnThe yarn shall be glass continuous filamentglass yarn which meets the requirements of Specification D578for the applicable yarn construction.5.2 Plastic CoatingThe material used to coat or impreg-nate the glass continuous filament yarn shall be a compound ofpolymerized or c
23、opolymerized vinyl chloride resin, plasticizedwith phosphate or phthalate ester plasticizers exclusively,pigmented and stabilized to meet the requirements herein.5.2.1 Optional PlasticizerThe use of plasticizers otherthan phosphates and phtalates shall be agreed upon betweenpurchaser and supplier.6.
24、 Put-Up6.1 The vinyl-coated glass yarn shall be put up on packagesor tubes, and in containers whose dimensions shall be agreedupon between the purchaser and the supplier.7. Yarn Number, Ignition Loss, and Breaking Force7.1 The requirements of yarn number, ignition loss, andbreaking force are specifi
25、ed in Table 1.8. Color8.1 Samples shall be a commercial match to color standardsagreed upon between the purchaser and the supplier.NOTE 2Gray and charcoal are considered standard colors. They are ingeneral use and demand and are the most readily available. Other colorsare usually available on a made
26、-to-order basis.9. Workmanship9.1 As agreed upon between the purchaser and the supplier,the following defects shall be considered cause for rejection ofthe yarn package in which they occur:9.1.1 Uncoated or partially coated sections of yarn.9.1.2 Slubs, large lumps, or coating irregularities of such
27、degree as to adversely affect weaveability of the yarn or causeexcessive rejects of the final product. Small irregularities thatrepresent inherent characteristics of the coating are permitted.9.1.3 Yarns that have been bruised, cut, or mashed.9.1.4 Splices exceeding 25 mm 1 in. in length or havingun
28、bonded or fused ends.9.1.5 Any defect affecting the free unhampered unwindingof yarn or affecting the secure holding of yarn winds on thepackage.10. Color Stability to Accelerated Weathering10.1 When tested as specified in Section 18, the observedcolor change after 480 h shall be no greater than Ste
29、p 3 on thegray scale and after 960 h shall be no greater than Step 2 on thegray scale.10.2 When agreed upon between the purchaser and thesupplier, other exposure periods and other gray scale ratingsshall be acceptable.TEST METHODS11. Conditioning11.1 Condition the laboratory samples without precondi
30、-tioning for a period of at least 5 h in the atmosphere for testingglass textiles as directed in Practice D1776, unless otherwisespecified.NOTE 3In any event, 24 h is considered ample exposure time to bringthe samples to moisture equilibrium.12. Material12.1 Upon prior agreement, the purchaser shall
31、 accept thesuppliers certification that the materials comply with theTABLE 1 Physical Property RequirementsAClassi-ficationYarn Number, text yd/lbIgnitionLoss,min,%Breaking Force,min, N (lbf)min nominal max Conditioned WetClass 1 99 5000 91 5450 84 5900 58 17.8 4.0 15.6 3.5Class 2 160 3100 136 3650
32、118 4200 53 28.9 6.5 24.5 5.5ANominal values are supplied for information only.D3374/D3374M 142requirements of Section 5. In the absence of such an agreementcompliance will be tested using Specification D578 and Fed.Std. CCC-D-950.13. Put-Up13.1 Verify that the yarn packages and shipping containersc
33、onform to agreement by inspection in the purchasers plant.14. Yarn Number14.1 Determine the yarn number as directed in Test MethodD1907. Report the yarn number as metres per kilogram yardsper pound. Test one specimen having a skein length of 27.5 m30 yd per laboratory sampling unit.NOTE 4Tex metres
34、per kilogram is equal to 496 055 divided by theyards per pound.14.2 See Annex A1 for information on precision and bias.15. Ignition Loss15.1 Determine the ignition loss as directed in Test MethodD4963 using one 27.5-m 30-yd skein of vinyl-coated glassyarn from each laboratory sampling unit.NOTE 5An
35、estimation of ignition loss can be obtained by subtractinginput yardage from control yarn yardage.16. Breaking Force16.1 Test the breaking force as directed in Test MethodD2256. A constant rate of extension (CRE) tester is recom-mended with pneumatic type clamps with fixed nubbingsurfaces which are
36、integral with one of the clamping surfaces.The snubbing surfaces may be circular with a diameter of notless than 12.5 mm 0.5 in. or may be semi-involute.16.2 Test five specimens per laboratory sampling unit usingeach of the following procedures:16.2.1 Use Option A1 for conditioned single-strandFORCE
37、. Preconditioning is not required.16.2.2 Use Option A2 for wet single-strand force. Immersefor 24 h in distilled water containing no wetting agents.16.3 See Annex A1 for information on precision and bias.17. Color and Workmanship17.1 Examine each yarn package in the laboratory samplefor visual appea
38、rance of its outer surface. Reject any yarnpackage having defects defined in Section 9 or whose color isnot a commercial match to the color standard.18. Color Stability to Accelerated Weathering18.1 Determine the color stability to accelerated weatheringas directed in Practice D4329, Cycle A, using
39、one appropriatesize specimen for a total exposure of 480 h and one appropriatesize specimen for a total exposure of 960 h for each laboratoryroll to be tested.18.1.1 Rate the specimens for color change after exposure inaccordance with AATCC Evaluation Procedure 1.CONFORMANCE AND INDEXING19. Conforma
40、nce19.1 The purchaser and the supplier shall agree on aprocedure to establish conformance, including control chartsfurnished by the supplier, a sequential sampling plan, ordouble-sampling plan outlined in 19.2.19.2 In the absence of a control chart or sequential samplingplan, proceed as directed in
41、19.2.1 19.2.3.19.2.1 If the test results for a lot conform to the require-ments for all characteristics listed in Sections 510 and Table1, the lot shall be considered acceptable.19.2.2 If the test results for one or more characteristics donot conform to the requirements, take a new laboratory sample
42、from either the original lot sample or a new lot sample. Test thenew sample for the characteristic(s) that did not conform to therequirements in the first test and average the results of the firstand second samples as if they were one test of double theoriginal number of specimens. If the new averag
43、e(s) con-form(s) to the specified requirements, the lot shall be consid-ered acceptable.19.2.3 If the test results obtained as directed in 19.2.2 do notconform to the specified requirements, the lot shall be consid-ered unacceptable.20. Keywords20.1 appearance; breaking force; color; colorfastness;
44、flex-ibility; ignition loss; thickness; vinyl-coated glass yarns; yarnnumberD3374/D3374M 143ANNEX(Mandatory Information)A1. INTERLABORATORY TEST DATA FOR PRECISION AND BIAS FOR BREAKING force, THICKNESS, AND YARN NUM-BERA1.1 SummaryIn 95 out of 100 cases when comparingtwo averages, the differences s
45、hould not exceed the amountsshown in Table A1.1 for the respective number of determina-tions when all of the determinations are taken by the samewell-trained operator using the same piece of test equipmentand specimens randomly drawn from the same sample ofmaterial but tested at different times. Lar
46、ger differences arelikely to occur under all other conditions.A1.1.1 Larger differences are likely to occur under all otherconditions. The test methods specified for breaking force, andyarn number have no bias since the true value of breakingforce, and yarn number can only be defined in a specific t
47、estmethod. Sections A1.2 A1.4 explain the basis for thissummary and for evaluations made under other conditions.A1.2 Interlaboratory Test Data6An interlaboratory testwas run in 1986 in which randomly drawn specimens of aClass 1 vinyl-coated glass yarn and a Class 2 vinyl-coated glassyarn were tested
48、 in each of four laboratories. Each laboratoryused two operators, each of whom tested the number ofspecimens shown in A1.1 for each material at different times.The components of variance expressed as coefficients ofvariation are listed in Table A1.2.NOTE A1.1The square roots of the components of var
49、iance are beingreported to express the variability as percent of the average rather than asthe square of that unit of measure.A1.3 PrecisionFor the components of variance reportedin Table A1.2, two averages of observed values should beconsidered significantly different at the 95 % probability levelif the difference equals or exceeds the critical differences listedin Table A1.3.NOTE A1.2Since the interlaboratory test included only fourlaboratories, estimates of between-laboratory precision should be usedwit
