1、Designation:D400592(Reapproved 2015)Standard Test Method forPlastic-Coated FabricsCompleteness of Fusion of PVCDispersion Coatings1This standard is issued under the fixed designation D4005;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revis
2、ion,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This test method describes a simple procedure to deter-mine the completeness of fusion of poly(vinyl chlori
3、de)(PVC)dispersion coatings on fabric.This test applies primarily tocoatings with a mechanical bond and does not include tiecoating.1.2 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish
4、 appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2.Summary of Test Method2.1 Specimens of the PVC-coated fabric are examined forsurface cracks or breaks,followed by immersion in acetone.Subequent appearance of additional cracking indic
5、ates thatfusion is incomplete.3.Significance and Use3.1 Poly(vinyl chloride)(PVC)is applied to coated fabricsas a dispersion of PVC particles in a liquid vehicle.During theprocessing of the fabric the PVC is fused or melted to producea uniform film on the fabric.This test measures whether thePVC is
6、converted,fused,or melted to produce a homogeneousfilm.3.2 This conversion process is a melting of the crystallitestructures in the polymer particles followed by solution of themolten polymer in the plasticizing vehicle.Fusion is importantin the production of PVC-coated fabrics.4.Apparatus and Reage
7、nts4.1 Glass Beaker,500-mL.4.2 Acetone.4.3 Glass Rods,5-mm diameter.4.4 Metal Clips.5.Sampling5.1 Select a sample of coated fabric to adequately representthe roll or lot under consideration.5.2 Cut three 20 by 40-mm test specimens to be tested,onein the middle and the others from the sides at least
8、200 mmfrom the edges of the roll of fabric.5.3 Remove the PVC coating from the fabric of the testspecimens by peeling carefully.6.Procedure6.1 Carefully examine each specimen for cracks on thesurface or breaks(cracks completely through the film)andrecord size,frequency,and location.6.2 Wrap each spe
9、cimen around a glass rod with the coatingunder test outward.Secure the assembly with a metal clamp.6.3 Immerse the test specimens in acetone at 23 6 2 C for15 min.Remove and examine visually.Determine whethercracks or breaks have appeared.7.Report7.1 Report the following information:7.1.1 Descriptio
10、n of the material and date manufactured,7.1.2 Date tested,7.1.3 If any cracks or breaks have appeared,report thatfusion is incomplete,and7.1.4 Report the observation of each test specimen sepa-rately.8.Precision and Bias8.1 This test is essentially a“pass-fail”test and does notassess a quantitativel
11、y measured test characteristic.Due to thisno precision and bias data are reported.9.Keywords9.1 coated fabrics;fusion;PVC1This test method is under the jurisdiction of ASTM Committee D11 on Rubberand is the direct responsibility of Subcommittee D11.37 on Coated Fabrics,RubberThreads and Seals.Curren
12、t edition approved June 1,2015.Published September 2015.Originallyapproved in 1981.Last previous edition approved in 2010 as D4005 92(2010).DOI:10.1520/D4005-92R15.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 ASTM International takes n
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