ASTM_D_4909_-_89_scan.pdf

ASTM DY909 89 W 0759530 0038142 3 W#TB Designation:D 4909-89 AMERICAN SOCIETY FOR TESTING AND MATERIALS 1916 Race S I.,Philadelphia,Pa.19103 Reprinled from lhe Annual Book of ASTM Standards,Copyright ASTM If not lisled in lhe current combined index,will appear in lhe next edition.Standard Test Method for Color Stability of Vinyl-Coated Glass Textiles to Accelerated Weathering This standard is issued under the fixed designation D 4909;the number immediately following the designation indicates the year of original adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.A superscript epsilon(e)indicates an editorial change since the last revision or reapproval.,-.I-l.Scope 1.1 This test method covers a procedure for evaluating the color change of vinyl-coated glass yarn textiles,such as yarns,insect screening,solar screening,and louver cloth,after exposure in a test apparatus with controlled wetting of the specimen by water spray,controlled relative humidity,and employing an open-flame carbon arc light source.1.2 This test method shows the values in both SI units and inch-pound units.“SI units”is the technically correct name for a system of metric units known as the International System of Units.“Inch-pound units is the technically correct name for the customary units used in the United States.The values stated in inch-pound units are to be regarded as the standard.The values in SI units are provided for information only.1.3 This standard may involve hazardous materials,oper-atioiis,and eqiiipmeiit.This standard does not purport to address all ofthe safity problems associated with its use.It is lie respoiisbiity of the tiser of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.Specific precautionary statements are given in Section 7.2.Referenced Documents 2.i ASTM Standards:D 123 Terminology Relating to Textiles2 D 2258 Practice for Sampling Yarn in Testing2 E 17 1 Specification for Standard Atmospheres for Condi-2.2 AATCC Standards:1 1 IA Weather Resistance:Sunshine Arc Lamp Procedure Evaluation Procedure 1:Gray Scale for Color Change4 3.i DeJinitiorts:3.1.I atmosphere for testing textiles,n-for glass,air maintained at a relative humidity of at least 48%and no greater than 67%,and at a temperature of at least 20C(68F)and no greater than 25C(77F).3.1.1.1 Discrcssion-Glass textiles are used in various tioning and Testing Materials3 With wetting4 3.Terminology This test method is under the jurisdiction of ASTM Committee D-13 on Textiles and is the direct mponsibilify of Subcommittee D13.18 on Glass Fiber and Its Praducts.Current edition approued Feb.24,1989.Published April 1989.Atitirtd Book ufASM Statiddrds,Vol 07.01.Atinrral Rook ofASTE Standards,Vol 08.03.AATCC Technical hlanuai,availabb from American Association of Textile Chemists and Colorists,P.O.Box 12215,Research Triangle Pack,NC 27709.products such as reinforced plastics,mat-like material,tire cords,electrical insulation,etc.Each of these materials requires different testing atmospheres.It is the intent of the wide spread in testing atmosphere to allow testing of glass textiles in respective laboratories where end product test atmosphere requirements differ.The test atmospheres for respective products should be controlled as specified in Specification E 171,It is the opinion of ASTM Subcom-mittee D 1 3.1 8 that color stability of vinyl coated glass yarn textiles would not be affected by the range selected.In any event,the test atmosphere should be stated in the report.3.1.2 color stability,n-in coated glass textiles,the ability of the applied coating to resist fading from exposure to sunlight and water.3.1.3 For definitions of other textile terms used in this test method,refer to Terminology D 123.4.Summary of Test Method 4.1 Samples of the vinyl-coated glass yarn textiles to be tested are exposed to specified conditions of water spray,relative humidity,and light.The color change after exposure is compared to its original color.5.Significance and Use 5.1 This test method is considered satisfactory for accept-ance testing of commercial shipments since the method has been used extensively in the trade for acceptance testing.5.1.1 In cases of a dispute arising from differences in reported test results when using this test method for accept-ance testing of commercial shipments,the purchaser and the supplier should conduct comparative tests to determine if there is a statistical bias between their laboratories.Compe-tent statistical assistance is recommended for the investiga-tion of bias.As a minimum,the two parties should take a group of test specimens which are as homogeneous as possible and which are from a lot of material of the type in question.The test specimens should then be randomly assigned in equal numbers to each laboratory for testing.The average results from the two laboratories should be