1、Designation: D4726 15 An American National StandardStandard Specification forRigid Poly(Vinyl Chloride) (PVC) Exterior-Profile ExtrusionsUsed for Assembled Windows and Doors1This standard is issued under the fixed designation D4726; the number immediately following the designation indicates the year
2、 oforiginal adoption or, in the case of revision, 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. Scope*1.1 This specification establishes requirements for the ma-
3、terial properties, including dimensional stability,weatherability, and extrusion quality, of rigid poly(vinyl chlo-ride) (PVC) exterior profile extrusions used for assembledwindows and doors. Methods for testing and for identifyingexterior profile extrusions that comply with this specificationare al
4、so provided.1.2 The use of rigid PVC recycled plastic in this productshall be in accordance with the requirements in Section 6.NOTE 1Information with regard to application, assembly, and instal-lation should be obtained from the manufacturers of the profiles and of thewindows and doors.NOTE 2Refer t
5、o Specification D3678 for interior profile extrusions.1.3 Color-hold guidelines are provided in an appendix forthe manufacturers product development and quality perfor-mance use.1.4 Color-hold guidelines are presently limited to white,grey, beige, light brown, and dark brown (see Figs. X1.1through X
6、1.5). Additional colors will be added as colorguidelines are developed.1.5 The values stated in inch-pound units are to be regardedas standard. The values given in parentheses are for informa-tion only.NOTE 3There is no known ISO equivalent to this standard.1.6 The text of this standard references n
7、otes and footnotes,which provide explanatory material. These notes and footnotes(excluding those in tables and figures) shall not be consideredas requirements of this standard.1.7 The following safety hazards caveat pertains only to thetest methods portion, Section 11, of this specification: Thissta
8、ndard 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 healthpractices and determine the applicability of regulatory limita-tions prior to use.2. Referenced Documents2.1 AS
9、TM Standards:2D618 Practice for Conditioning Plastics for TestingD883 Terminology Relating to PlasticsD1042 Test Method for Linear Dimensional Changes ofPlastics Caused by Exposure to Heat and MoistureD1435 Practice for Outdoor Weathering of PlasticsD1600 Terminology forAbbreviated Terms Relating to
10、 Plas-ticsD2244 Practice for Calculation of Color Tolerances andColor Differences from Instrumentally Measured ColorCoordinatesD3678 Specification for Rigid Poly(Vinyl Chloride) (PVC)Interior-Profile ExtrusionsD3892 Practice for Packaging/Packing of PlasticsD4216 Specification for Rigid Poly(Vinyl C
11、hloride) (PVC)and Related PVC and Chlorinated Poly(Vinyl Chloride)(CPVC) Building Products CompoundsD4226 Test Methods for Impact Resistance of Rigid Poly-(Vinyl Chloride) (PVC) Building ProductsD7209 Guide for Waste Reduction, Resource Recovery, andUse of Recycled Polymeric Materials and Products (
12、With-drawn 2015)3E631 Terminology of Building ConstructionsE805 Practice for Identification of Instrumental Methods ofColor or Color-Difference Measurement of MaterialsG147 Practice for Conditioning and Handling of Nonmetal-lic Materials for Natural and Artificial Weathering Tests3. Terminology3.1 G
13、eneralDefinitions are in accordance with Terminolo-gies D883 or E631 and D1600, unless otherwise indicated.1This specification is under the jurisdiction of ASTM Committee D20 onPlastics and is the direct responsibility of Subcommittee D20.24 on Plastic BuildingProducts.Current edition approved May 1
14、, 2015. Published June 2015. Originallyapproved in 1987. Last previous edition approved in 2009 as D4726 09. DOI:10.1520/D4726-15.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume informat
15、ion, refer to the standards Document Summary page onthe ASTM website.3The last approved version of this historical standard is referenced onwww.astm.org.*A Summary of Changes section appears at the end of this standardCopyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocke
16、n, PA 19428-2959. United States13.2 Definitions of Terms Specific to This Standard:3.2.1 color-hold guidelinestarget color regions within athree-dimensional model which constitute acceptable appear-ance retention levels of color change resulting from weatheringof a specific product type and color.3.
17、2.2 temperate northern climatein weather testing, aNorth American metropolitan area testing site located within73 to 100 W longitude and 37 to 45 N latitude.4. Classification4.1 Color RegionsThe color region for a color is deter-mined by measuring the Hunter L, a, b color values for asample. Use the
18、 integer value (by truncating any fractionalresults) to determine the color region for the color using thefollowing region boundaries.4.1.1 Region 1Beige:L = 60 to 87a=2.5to4.0b = 6.5 to 234.1.2 Region 2Dark Brown:L = 13 to 33a=1.0to6.0b = 1.0 to 6.54.1.3 Region 3Gray:L = 33 to 74a=3to4b=5.5to5.54.1
19、.4 Region 4Light Brown:L = 30 to 60a = 1.5 to 12.5b = 3.0 to 12.54.1.5 Region 5White:L = 83 to 100a=4to0b = 5.5 to +5.5NOTE 4L, a, b is determined in accordance with the Hunter L, a, bopponent color space system in Test Method D2244.5. Significance and Use5.1 The purpose of this specification is to
20、establish arecognized standard of quality for rigid poly(vinyl chloride)(PVC) exterior weatherable profile extrusions for use inassembling windows and doors. The information contained inthis specification is intended to be helpful to producers,distributors, and users, and to promote understanding be
21、tweenbuyers and sellers. It is also intended to serve as the basis forspecification requirements of exterior windows and doorswhich are made from rigid PVC profile extrusions in theirconstruction.6. Materials and Manufacture6.1 The profile extrusions used for assembled windows anddoors shall be made
22、 principally of weatherable, rigid poly(vi-nyl chloride) (PVC) compounds meeting or exceeding therequirements of Class 1-20131-13 as defined in SpecificationD4216.NOTE 5Non-PVC materials may be used as a capstock.6.2 Rigid PVC recycled plastic, as defined in Guide D7209,is acceptable for use in this
23、 product if all the requirements inthe sections on Terminology (Section 3), Materials and Manu-facture (Section 6), Physical Requirements (Section 7), andPerformance Requirements (Section 8) are met by the extru-sions containing PVC recycled plastic.6.3 The PVC compound in the extruded section shall
24、 haveuniform color and be free of any visual surface or structuralchanges, such as peeling, chipping, cracking, flaking, orpitting.6.4 Rework MaterialClean, homogeneous PVC reworkmaterial or rework material containing PVC capstock gener-ated from the manufacturers own production of the same classcom
25、pound is acceptable for use by the same manufacturerproviding that the extruded profiles meet all the requirementsof this specification. Clean principally PVC rework materialcontaining non-PVC capstock is acceptable for use in thesubstrate of a capstocked product by the same manufacturer,providing t
26、hat the extruded profiles meet all of the require-ments of this specification.6.5 The PVC compound shall have a minimum impactresistance of 0.6 in.lb/mil (2670 J/m) after weathering for sixmonths and one year in a hot, dry climate such as Phoenix,AZ;a hot, humid climate, such as Miami, FL; and a tem
27、peratenorthern climate.6.6 The PVC compound in the extruded section shallmaintain uniform color and be free of any surface or structuralchanges, such as peeling, chipping, cracking, flaking, or pittingafter weathering for six months, one year, and two years in ahot, dry climate, such as Phoenix, AZ;
28、 a hot, humid climate,such as Miami, FL; and a temperate northern climate whentested in accordance with Annex A1.6.7 The PVC compound shall have successfully met theweathering requirements prescribed in 6.4 and 6.5 for sixmonths at each climatic testing site prior to use in productionof exterior-pro
29、file extrusions for either market development orsales.NOTE 6The six-month-test requirement constitutes a screening pro-cess to eliminate catastrophic failure in the marketplace.7. Physical Requirements7.1 DimensionsThe size, thickness, and dimensional tol-erances of the exterior profiles shall be as
30、 agreed upon betweenthe supplier and the purchaser in the purchase order, or byestablished internal process control standards.7.2 Dimensional StabilityThe dimensional stability of theexterior-profile extrusions shall be determined in accordancewith 11.3. Extrusions over 0.040 in. (1.02 mm) shall hav
31、e amaximum average shrinkage of 2.2 % for all sides measured,with no single value exceeding 2.4 %. Extrusions of 0.040 in.(1.02 mm) or less shall have a maximum average shrinkage of3%.7.3 Impact ResistanceFlat sections of the exterior profileextrusion shall have a minimum brittle impact failure of 1
32、.0in.lb/mil (4450 J/m) when tested in accordance with TestMethods D4226, Procedure B, using impactor C.125. Refer to11.4.D4726 1528. Performance Requirements8.1 Weathering:8.1.1 The exposures listed in 6.6 shall be conducted in orderto meet the requirements of this specification. All exposuresshall
33、be conducted at an angle of 45 S, plywood-backed, inaccordance with Practice D1435 and Practice G147.8.1.2 After six-month and 1-year exposure times, the mini-mum mean impact for 20 measurements conducted on theexposed specimens shall be at least 0.6 inlb/mil (2670 J/m).Test impact in accordance wit
34、h 11.4, A1.4, and A1.5.8.1.3 After each exposure time, the tested specimens shallmaintain a uniform color and be free of any visual surface orstructural changes such as peeling, chipping, cracking, flaking,and pitting when tested in accordance with Annex A1.NOTE 7It is recommended that manufacturers
35、 use the color-holdguidelines in Appendix X1 to ensure quality performance.8.1.4 Weatherability conformance testing requirements areto reflect performance of a “typical” extrusion system profilerepresenting a specific PVC compound and a specific extrusiontechnology. In no case is there an implied re
36、quirement fortesting all the various shaped profiles. The lengthy outdoorweatherability testing shall be performed concurrently withmarket development of new applications and sales of profilesto existing markets. Completion of weatherability testing priorto marketing of the product is not required.
37、The profileextrusion producer shall immediately respond in terms ofcompound change or extrusion technology change to unsatis-factory weatherability behavior of the profiles under test in anyclimatic test site at any stage of the weatherability testing.9. Workmanship, Finish, and Appearance9.1 The ex
38、trusions shall be acceptable between the buyerand the seller or meet internal process control standards insection, color, and finish. The extrusions shall be substantiallystraight and free from defects that might affect appearance orserviceability.10. Sampling10.1 Select samples using a statisticall
39、y acceptable proce-dure. The samples shall be representative of the compoundused.11. Test Methods11.1 GeneralUse the inspection and test procedures con-tained in this section to determine the conformance of productsto the requirements of this specification. A producer or dis-tributor representing pr
40、oducts as conforming to this specifica-tion shall use statistically based sampling plans that areappropriate to each manufacturing process. Keeping essentialrecords are necessary to document with a high degree ofassurance the claim that all of the requirements of thisspecification have been met.Addi
41、tional sampling and testing ofthe product, as agreed upon between the supplier and thepurchaser, is not precluded by this section.11.2 Conditioning of SpecimensCondition the test speci-mens in accordance with ProcedureAof Practice D618. For thepurpose of quality control testing, the minimum conditio
42、ningtime shall be four hours.11.3 Dimensional Stability:11.3.1 Determine the dimensional stability in accordancewith Test Method D1042, except that one or more specimensshall be exposed to either of the following test cycles:11.3.1.1 30 min immersed in water maintained at 180 6 2F(82 6 1 C), or11.3.
43、1.2 30 min conditioned in a forced-ventilation oven at180 6 2F (82 6 1 C).11.3.2 Specimens shall condition for no less than1hinaccordance with Procedure A of Practice D618, prior tomeasurement. If a specimen were to fail, select and retest twoadditional specimens.11.4 Impact TestDetermine the impact
44、 strength in accor-dance with Test Methods D4226, Procedure B, using the C.125impactor.12. Packing, Packaging, and Package Marking12.1 The exterior profile extrusions shall be packaged insuch a manner as to provide reasonable protection againstdamage in ordinary handling, transportation, and storage
45、.12.2 Provisions of Practice D3892 shall apply to this speci-fication.12.3 Marking on each package of extruded profile extru-sions shall include the following:12.3.1 Manufacturers name or trademark;12.3.2 Identity of code number of extrusion profiles;12.3.3 Class of compound (Specification D4216) us
46、ed inprofiles;12.3.4 The designation ASTM D4726, affirming that theproduct so marked has been qualified to all the provisions ofthis specification, and12.3.5 The date and any other relevant information, such asfactory, machine, production shift, and so forth, either directlyor all or partly coded.13
47、. Keywords13.1 color-hold guidelines; doors; exterior-profile extru-sions; poly(vinyl chloride) (PVC); recycled plastic; windowsD4726 153ANNEXES(Mandatory Information)A1. WEATHERABILITY PROCEDUREA1.1 Summary of Procedure of DeterminingWeatherabilityA1.1.1 Flat section specimens cut from finished pro
48、ductlineals or laboratory extruded samples are exposed in accor-dance with Practice D1435 and Practice G147 at 45 S,plywood-backed, in a hot, dry (desert) climate, such asPhoenix, AZ; a hot, humid climate such as Miami, FL; and ina northern temperate climate for periods of six months, oneyear and tw
49、o years.A1.1.2 Color change as a result of weather exposure at eachclimatic exposure site is measured after six months, one yearand two years.A1.1.3 Degree of retention of the original impact strengthdue to weather exposure in each exposure site is measured aftersix-months and one-year exposure.A1.1.4 The acceptability of color uniformity, and surface orstructural changes resulting from weathering at each test siteand each exposure frequency is determined by visual observa-tion in comparison to the unweathered specimens.A1.2 Significance
