1、Designation: D 3656 04Standard Specification forInsect Screening and Louver Cloth Woven fromVinyl-Coated Glass Yarns1This standard is issued under the fixed designation D 3656; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the ye
2、ar 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.1. Scope1.1 This specification covers the
3、requirements for vinyl-coated glass yarn insect screening and louver cloth.1.2 This specification is intended to assist ultimate users bydesignating the sizes and types of these products that aregenerally available in the industry.1.3 This specification shows the terminology and require-ments for:1.
4、3.1 Commercial standard vinyl-coated glass yarn insectscreening designed and woven primarily for installation in oron any dwelling, patio, screening enclosure, building, orstructure for the purpose of keeping out flies, mosquitoes, andmost insects.1.3.2 Vinyl-coated glass yarn louver cloth used exte
5、nsivelyin soffit and louver vents to keep out most large insects, birds,and airborne litter, while at the same time providing foradequate ventilation and air circulation.1.4 This specification shows the values in both SI units andinch-pound units. “SI units” is the technically correct name fora syst
6、em of metric units known as the International System ofUnits. “Inch-pound units” is the technically correct name forthe customary units used in the United States.The values statedin inch-pound units are to be regarded as the standard. Thevalue in SI units are provided for information only.1.5 The fo
7、llowing precautionary caveat pertains only to thetest methods portions, Sections 8-19, of this specification. Thisstandard does not purport to address all of the safety concerns,if any, associated with its use. It is the responsibility of the userof this standard to establish appropriate safety and
8、healthpractices and determine the applicability of regulatory limita-tions prior to use.2. Referenced Documents2.1 ASTM Standards:2D 76 Specification for Tensile Testing Machines for TextilesD 123 Terminology Relating to TextilesD 578 Specification for Glass Fiber StrandsD 1776 Practrice for Conditi
9、oning and Testing TextilesD 3374 Specification for Vinyl-Coated Glass YarnsD 3773 Test Methods for Length of Woven FabricD 3774 Test Methods for Width of Textile FabricD 3775 Test Method for Warp End Count and Filling PickCount of Woven FabricD 3776 Test Methods for Mass Per Unit Area (Weight) ofFab
10、ricD 3786 Test Method for Hydraulic Bursting Strength ofTextile FabricsDiaphragm Bursting Strength TesterMethodD 4028 Specification for Solar Screening Woven fromVinyl-Coated Fiber Glass YarnD 4329 Practice for Fluorescent UV Exposure of PlasticsD 4372 Specification for Flame-Resistant Materials Use
11、d inCamping TentageD 4912 Test Method for Fabric Stability of Vinyl-CoatedGlass Yarn Insect Screening and Louver ClothD 4929 Practice for Operating Light and Water Apparatus(Fluorescent and Condensation Type) for Exposure ofPlasticsD 4963 Test Method for Ignition Loss of Glass Strands andFabrics2.2
12、AATCC Standards:3Evaluation Procedure 1, Gray Scale for Color Change1This 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 March 1, 2004. Published April 2004. Orig
13、inallyapproved in 1978. Last previous edition approved in 1997 as D 3656 97.2For 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 onth
14、e ASTM website.3Available from American Association of Textile Chemists and Colorists, P. O.Box 12215, Research Triangle Park, NC 27709.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.2.3 ANSI/ASQC Standards:4ANSI/ASQC Z1.4 Sampling
15、Procedures for Inspection byAttributesANSI/ASQC Z1.9 Sampling Procedures and Tables forInspection Variables for Percent Nonconforming2.4 Federal Standards:5CCC D-950 Specification, Dyeing and After Treating Pro-cesses for Cotton ClothsTest Method Standard No. 191a, Textile Test Methods,Method 5872 E
16、ffect of High Temperature on Cloth Block-ingStandard 595A CHG Not 1, Color Volume 13. Terminology3.1 Definitions:3.1.1 atmosphere for testing textiles, nfor glass, air main-tained at a relative humidity of at least 48 % and no greaterthan 67 %, and at a temperature of at least 20C (68F) and nogreate
17、r than 25C (77F).3.1.1.1 DiscussionGlass textiles are used in various prod-ucts, such as reinforced plastics, mat-like material, tire cords,electrical insulation, etc. Each of these materials requiredifferent testing atmospheres. It is the intent of the wide spreadin testing atmosphere to allow test
18、ing of glass textiles inrespective laboratories where end product test atmosphererequirements differ. The test atmospheres for respective prod-ucts should be controlled as specified in Practice D 1776.Itisthe opinion of Subcommittee D13.18 that the physical proper-ties cited in respective specificat
19、ions would not be affected bythe range selected. In any event, the test atmosphere should bestated in the report.3.1.2 insect screening, nin coated glass yarn fabrics,awoven netting having an approximately even-spaced mesh of12 by 12 yarns or more per 25 mm (1 in.).3.1.3 louver cloth, nin coated gla
20、ss yarn fabrics, a wovennetting having an approximately even-spaced mesh of fewerthan 12 by 12 yarns per 25 mm (1 in.).3.1.4 mesh, nin coated glass yarn fabrics, the number ofwarp yarns or ends per linear 25 mm (1 in.) followed by thenumber of filling yarns or picks per linear 25 mm (1 in.).3.1.5 Fo
21、r terminology of other textile terms used in thisspecification, refer to Terminology D 123.4. Classification4.1 Vinyl-coated glass yarn insect screening is produced intwo basic classes and mesh to afford required strength andinsect protection using yarns as directed in SpecificationD 3374. These two
22、 classes are as follows:4.1.1 Class 1Insect screening woven from vinyl-coatedglass yarn having a nominal thickness of 0.292 mm (0.0115in.).4.1.2 Class 2Insect screening woven from vinyl-coatedglass yarn having a nominal thickness of 0.330 mm (0.013 in.).4.2 The mesh, width, and colors are listed in
23、Table 1.4.2.1 For vinyl-coated glass yarn insect screening not listedin Table 1, the mesh, width, and colors shall be agreed uponbetween the purchaser and supplier.5. Sampling and Test Specimens5.1 SamplingOn a continual basis, samples are selectedrandomly from each mesh and tested to insure complia
24、nce,unless otherwise agreed upon between the purchaser and thesupplier.5.2 Test SpecimensFor insect screening or louver clothappearance, width, and length testing, a roll shall serve as thetest specimen. For other properties, take the test specimen(s)from the roll. No specimen shall be taken closer
25、than 25 mm (1in.) from the edge or 0.9 m (1 yd) from the end of the roll.REQUIREMENTS6. General Requirements6.1 Material:6.1.1 WorkmanshipInsect screening or louver cloth shallbe made utilizing input yarns that meet the requirementsspecified in Specification D 3374. Products may contain amaximum of
26、one defect in the filling direction affecting lessthan 50 lineal mm (2 lineal in.). Examples of defects are listedin Table 2.6.1.2 PlasticizersThe material used to coat or impregnatethe fibrous glass yarn shall be a compound of polymerized orcopolymerized vinyl chloride resin, plasticized with phosp
27、hateor phthalate ester plasticizers exclusively, pigmented andstabilized to meet the requirements herein.6.1.2.1 Optional PlasticizerAt the suppliers option, plas-ticizers other than phosphates and phthalates may be usedprovided the color is not affected and the coating compound istreated with solub
28、ilized copper 8 quinolinolate which is listedas inhibitor (e) in Federal Standard CCC-D-950. The amountof fungicide shall be based on the nonvolatile content of thecoating. The coating compound shall be chemically analyzedfor copper 8 quinolinolate content in accordance with FederalStandard CCC-D-95
29、0.6.1.3 ColorThe maximum and minimum shades limitsshall be defined by color designations listed in FederalStandard 595A as agreed upon between the purchaser andsupplier.6.1.3.1 The color designated grey shall fall between No.36492 and No. 36173 as listed in Federal Standard 595A.6.1.4 SelvageVinyl-c
30、oated glass insect screening and lou-ver cloth may be supplied with or without selvages as agreedbetween the purchaser and supplier.6.1.5 Yarn SplicesVinyl-coated glass yarn splices shall bepermitted provided they show no tails and do not exceed 25mm (1 in.) in length. Yarn splices in the insect scr
31、eening orlouver cloth shall not exceed 15 per standard 30 m (100 ft) roll,and no more than one splice shall occur in any 930 cm2(1 ft2)of product.6.2 Put-UpVinyl-coated glass yarn insect screening andlouver cloth shall be put-up on rolls that may be placed incontainers whose dimensions shall be agre
32、ed upon between thepurchaser and the supplier.4Available from American National Standards Institute (ANSI), 25 W. 43rd St.,4th Floor, New York, NY 10036.5Available from General Services Administrations, Specification and ConsumerInformation Distribution Section (WFSIS), Washington Navy Yard, Bldg. 1
33、97,Washington, DC 20407.D36560427. Physical Requirements7.1 AppearanceUnless otherwise agreed upon betweenthe purchaser and the supplier, a roll shall be defective if itcontains two or more defects as described in 6.1.1.7.2 MeshThe standard average mesh shall be approxi-mately even-spaced as specifi
34、ed in Table 1 60.5 mesh per 25mm (1 in.). There are no tolerance requirements within 13 mm(0.5 in.) of the selvage.7.3 Roll LengthEach roll of insect screening or louvercloth complying with Specification D 3656 shall contain 30linear m 0, +0.6 m (100 linear ft 0, +2.1 ft).7.4 WidthThe standard avera
35、ge roll width shall be asspecified in Table 1 +7 or 0 mm (+0.25 in. or 0 in.).7.5 Mass per Unit AreaThe minimum average mass perunit area for each class shall be as specified in Table 3.7.6 Flame ResistanceThere shall be no propagation offlame along any specimen for longer than 10 s after removal of
36、the flame source and no single specimen may propagate flamealong its entire length in any time increment.7.7 Fabric StabilityThe yarns shall be bonded at eachcontact point. The fabric stability of the finished product shallbe determined in accordance with Test Method D 4912 andmeet the requirements
37、as specified in Table 3.7.8 Bursting StrengthThe minimum average burstingstrength of the finished product in its original state and after480 h of exposure to color stability after accelerated weather-ing as directed in Section 19 shall be as specified in Table 3.7.9 Stiffness IndexThe minimum and ma
38、ximum averagestiffness values are referenced in Table 4.7.10 Color Stability after Accelerated WeatheringThechange from the original color of the standard gray andcharcoal, after 480 h of accelerated weathering exposure shallbe no greater than step 3, and after 960 h of acceleratedweathering exposur
39、e shall be no greater than step 2, on theAATCC Gray Scale for evaluating change in color.NOTE 1Use of other types of weathering apparatus may give weath-ering characteristics that are not equivalent to the preferred apparatus.7.10.1 Exposure periods and acceptable changes in colorother than the stan
40、dard gray and charcoal shall be as agreedupon between the purchaser and the supplier.TABLE 1 Generally Available Mesh, Widths, and ColorsProduct ClassNominal Yarn Diameter,m (in.)Standard ConstructionWarp by Fill Mesh/25.4mm (Mesh/1 in.)Standard WidthsColorsmm in.Insect screening 1 292 (0.011) 18 3
41、16 610, 762, 813, 914,1067, 1219, 1524,1829, 213424, 30, 32, 36, 42, 48,60, 72, 84gray, charcoal2 330 (0.013) 18 3 14 914, 1219, 1524, 1829,2134, 2438, 274336, 48, 60, 72, 84, 96,108gray, charcoal2 330 (0.013) 18 3 14 914, 1219, 1829, 2134 36, 48, 72, 84 aqua2 330 (0.013) 20 3 20 914, 1219, 1524, 18
42、29,213436, 48, 60, 72, 84 gray, charcoalLouver cloth 2 330 (0.013) Less than 12 3 12 152, 203, 305, 610,914, 12196, 8, 12, 24, 36, 48 gray, charcoalTABLE 2 Examples of DefectsA,BBias or bowed filling:For widths # 1220 mm (48 in.) $ 13 mm (0.5 in.) Slack or tight selvageA,BFor widths 1220 mm (48 in.)
43、 $ 25 mm (1.0 in.) Splicemore than one in a 300 mm2(1 ft2) areaBBroken or missing strand (end or pick),A,BSplice more than 25 mm (1 in.) in lengthBDamaged selvage extending into the body of the screeningBSplice not well made and showing tailsBHeavy strandA,BSpot, stain, or streakA,BJerked-in filling
44、, slough-off, or kinky fillingA,BThin strandA,BColor bandsBTight strand (end or pick)A,BUncoated yarnsBAFor definitions of terms used in this table, refer to Terminology D 123.BAt normal inspection distance approximately 900-mm (3 ft).TABLE 3 Minimum Sample Average Mass and StrengthPropertiesPropert
45、yInsect Screening Louver ClothClass 1 Class 2 Class 218 3 16Mesh18 3 14Mesh20 3 20Mesh8 3 8MeshMass per unit area,g/m2(oz/yd2)102 (3.0) 146 (4.3) 176 (5.2) 68 (2.0)Fabric Stability,50 mm, N (2 in., lbf)Warp 36 (8) 44 (10) 53 (12) 22 (5)Fill 27 (6) 36 (8) 44 (10) 22 (5)Minimum average burstingstrengt
46、hbefore and after480-h exposureAkPa (psi)448 (65) 690 (100)AAfter 480-h exposure as directed in Section 17.TABLE 4 Nominal StiffnessStiffness MGAMin MaxInsect screeningClass 1 40 120Class 2 60 180Louver clothClass 2 40 120AThese values are for design or informational purposes only.D36560437.11 For v
47、inyl-coated glass yarn insect screening and louvercloth not listed in Table 1, the physical properties shall beagreed upon between the purchaser and the supplier except asnoted in 6.2.TEST METHODS8. Conditioning8.1 Condition the laboratory samples without precondition-ing for a period of at least5hi
48、ntheatmosphere for testingglass textiles as directed in Practice D 1776, unless otherwisespecified.NOTE 2In any event, 24 h is considered ample exposure time to bringthe samples to moisture equilibrium.9. Put-Up9.1 Verify that the rolls and shipping containers conform tothe inspection agreement in t
49、he purchasers plant.10. Appearance10.1 Before doing any other testing, determine the appear-ance as directed in the procedure described in SpecificationD 4028. Count all defects of the types as described in 6.1.1 andin Table 2 regardless of their proximity to each other, exceptwhere two or more defects represent a single local condition inthe screening. In such cases, count only the most seriousdefect.11. Mesh11.1 Determine the mesh as directed in Test MethodD 3775. Count the number of warp yarns in 25 mm (1 in.) offabric width in five randoml
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