ASTM D4226-19e1
(Test Method)Standard Test Methods for Impact Resistance of Rigid Poly(Vinyl Chloride) (PVC) Building Products
Standard Test Methods for Impact Resistance of Rigid Poly(Vinyl Chloride) (PVC) Building Products
SIGNIFICANCE AND USE
5.1 The impact strength values obtained on the flat sections of a building product profile are relevant only to the flat section that has been tested and these values do not necessarily indicate the impact resistance of the whole product, which is affected by the configuration of the profile (that is, corners, ribs, etc).
5.2 Constant weight and variable height, employed in these test methods, allow the velocity of impact to vary and, therefore, by Procedure B, can determine the energy of ductile-to-brittle transition, which cannot be determined if a variable weight is dropped from a constant height.
5.3 These test procedures have been found to be useful elements in rigid poly(vinyl chloride) (PVC) building product characterization. Compound qualification, finished product quality control, environmental and weatherability research and development studies, and fabrication tolerance prediction constitute useful applications.
FIG. 2 Impact Tester
5.4 Choice of the specific impactor head configuration used is related to a variety of product attributes, such as specimen thickness and product toughness as well as abstract factors, such as the anticipated mode of failure in a specific application. The geometric uniqueness of the impactor head configurations prevents any comparison or correlation of testing results on samples tested with differing impactor head configurations. In general, the conical impactor, C.125, is useful to ensure failure of thicker specimens where the H.25 impactor caused no failure.
Note 2: Equivalent surface conditions are more likely to occur when specimens are prepared by compression molding or extrusion than by injection molding.
5.5 When comparing different samples tested with the same impactor head configuration, impact resistance shall be permitted to be normalized for average specimen thickness over a reasonably broad range (for example, 1 to 3 mm).3 However, this should only be done when the surface conditions listed in 6.1...
SCOPE
1.1 These test methods cover the determination of the energy required to crack or break rigid poly(vinyl chloride) (PVC) plastic sheeting and profile flat sections used in building products, as well as extruded or molded test samples, under specified conditions of impact from a freefalling standard weight striking an impactor with either of two configurations in contact with the specimen.
1.2 Two test procedures are included:
1.2.1 Procedure A, used to determine minimum impact energy required to cause failure (hole, crack, split, shatter, or tear).
1.2.2 Procedure B, used to determine minimum impact energy required to cause brittle failure.
1.3 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.
Note 1: There is no known ISO equivalent to this standard.
1.4 The text of this standard references notes and footnotes which provide explanatory material. These notes and footnotes (excluding, those in tables in figures) shall not be considered as requirements of this standard.
1.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. Specific precautionary statements are given in Section 8.
1.6 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
General Information
Relations
Standards Content (Sample)
This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
´1
Designation: D4226 − 19 An American National Standard
Standard Test Methods for
Impact Resistance of Rigid Poly(Vinyl Chloride) (PVC)
1
Building Products
This standard is issued under the fixed designation D4226; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1
ε NOTE—Eq 4 was editorially corrected in August 2020.
1. Scope* mendations issued by the World Trade Organization Technical
Barriers to Trade (TBT) Committee.
1.1 These test methods cover the determination of the
energy required to crack or break rigid poly(vinyl chloride)
2. Referenced Documents
(PVC)plasticsheetingandprofileflatsectionsusedinbuilding
2
2.1 ASTM Standards:
products, as well as extruded or molded test samples, under
D618Practice for Conditioning Plastics for Testing
specified conditions of impact from a freefalling standard
D883Terminology Relating to Plastics
weightstrikinganimpactorwitheitheroftwoconfigurationsin
D5947Test Methods for Physical Dimensions of Solid
contact with the specimen.
Plastics Specimens
1.2 Two test procedures are included:
E178Practice for Dealing With Outlying Observations
1.2.1 Procedure A, used to determine minimum impact
E456Terminology Relating to Quality and Statistics
energy required to cause failure (hole, crack, split, shatter, or
E691Practice for Conducting an Interlaboratory Study to
tear).
Determine the Precision of a Test Method
1.2.2 Procedure B, used to determine minimum impact
E2935Practice for Conducting Equivalence Tests for Com-
energy required to cause brittle failure.
paring Testing Processes
1.3 Thevaluesstatedininch-poundunitsaretoberegarded
3. Terminology
as standard. The values given in parentheses are mathematical
3.1 Definitions—Definitions are in accordance with Termi-
conversions to SI units that are provided for information only
nology D883, unless otherwise specified. For terms relating to
and are not considered standard.
precision and bias and associated issues, the terms used in this
NOTE 1—There is no known ISO equivalent to this standard.
standard are defined in accordance with E456.
1.4 The text of this standard references notes and footnotes
3.2 Definitions of Terms Specific to This Standard:
whichprovideexplanatorymaterial.Thesenotesandfootnotes
3.2.1 failure (of test specimen, as related to impact
(excluding,thoseintablesinfigures)shallnotbeconsideredas
resistance)—signified by the presence of a punched hole,
requirements of this standard.
crack,split,shatter,ortearthatwascreatedinthetargetareaby
1.5 This standard does not purport to address all of the
the impact of the falling weight (see Fig. 1).
safety concerns, if any, associated with its use. It is the
3.2.2 ductile failure (ductile break, as related to impact
responsibility of the user of this standard to establish appro-
resistance)—a tear or split having an angle greater than 0° at
priate safety, health, and environmental practices and deter-
the tip and extending through the entire thickness of the
mine the applicability of regulatory limitations prior to use.
specimen such that light is directly visible through the tear or
Specific precautionary statements are given in Section 8.
split (see Fig. 1).
1.6 This international standard was developed in accor-
3.2.3 brittle failure (brittle break, as related to impact
dance with internationally recognized principles on standard-
resistance)—a punched hole, split, or shatter where a piece of
ization established in the Decision on Principles for the
the specimen separates from the main part of the specimen or
Development of International Standards, Guides and Recom-
acrackthathasa0°angleatthetipasviewedbythenakedeye
(see Fig. 1).
1
These test methods are under the jurisdiction of ASTM Committee D20 on
Plastics and are the direct responsibility of Subcommittee D20.24 on Plastic
2
Building Products. For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Current edition approved Nov. 1, 2019. Published December 2019. Originally contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
approved in 1983. Last previous edition approved in 2016 as D4226-16. DOI: Standards volume information, refer to the standard’s Document Summary page on
10.1520/D4226-19E01. the ASTM website.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.