ASTM C1908-21

Standard Test Method for Pummel Adhesion Testing of Two-ply Laminated Architectural Glass

SIGNIFICANCE AND USE
5.1 Pummel adhesion of laminated glass is a method used to measure the relative adhesive bond strength between the interlayer and glass substrate interface. The interlayer to substrate adhesion has a great effect on the impact resistance of laminates as well as long term stability. This test method is intended to provide three levels of grading. This test method is not intended to provide more precision. The laminate bond strength, in most applications, must be controlled to avoid potential problems of delamination at low adhesion and impact failures or undesirable post breakage characteristics at high adhesion.
SCOPE
1.1 This test method determines the relative strength of the adhesive bond between interlayer and glass, inks, coatings, frit or other materials adhered to the glass surface to which interlayers may bond (hereinafter, glass substrate).  
1.2 This test method outlines a test method to be used on laminated architectural glass with two layers of glass substrate bonded by an interlayer. Glass substrate can be undecorated, decorated, uncoated, coated, annealed or strengthened, flat or patterned. One or more of the surfaces of glass may have a surface with ink, coatings, frit, patterns, a low-e type coating etc.  
1.3 This test method is a qualitative test which covers manual and semi-automatic mechanical pummel testing and visual rating of tested specimens.  
1.4 Units—The values stated in SI units are to be regarded as standard. The values given in parentheses after SI units are provided for information only and are not considered 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.  
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

• Status: Published
• Publication Date: 31-Aug-2021
• ICS: 81.040.20 - Glass in building
• Technical Committee: C14 - Glass and Glass Products
• Drafting Committee: C14.08 - Flat Glass

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.
Designation: C1908 − 21
Standard Test Method for
Pummel Adhesion Testing of Two-ply Laminated
1
Architectural Glass
This standard is issued under the fixed designation C1908; 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 (´) indicates an editorial change since the last revision or reapproval.
1. Scope C1172 Specification for Laminated Architectural Flat Glass
1.1 This test method determines the relative strength of the
3. Terminology
adhesive bond between interlayer and glass, inks, coatings, frit
or other materials adhered to the glass surface to which
3.1 Definitions:
interlayers may bond (hereinafter, glass substrate).
3.1.1 Refer to terminology in Specifications C162 and
C1172.
1.2 This test method outlines a test method to be used on
3.2 Definitions of Terms Specific to This Standard:
laminated architectural glass with two layers of glass substrate
bonded by an interlayer. Glass substrate can be undecorated, 3.2.1 ball peen hammer, n—(also known as a machinist’s
hammer),atypeofhammerhavingtwoheads,onehemispheri-
decorated, uncoated, coated, annealed or strengthened, flat or
patterned. One or more of the surfaces of glass may have a cal (peen) and the other flat.
surface with ink, coatings, frit, patterns, a low-e type coating
3.2.2 cardboard backer panel, n—used in rating the
etc.
pummel, a very thick (3 mm (0.125 in.) or greater) cellulose
1.3 This test method is a qualitative test which covers fiberpapermaterial,usuallypalebrownincolor(typicallyused
manual and semi-automatic mechanical pummel testing and
for making boxes), sized to fit completely under the specimen
visual rating of tested specimens. to be rated.
1.4 Units—The values stated in SI units are to be regarded
3.2.3 glass substrate, n—laminate comprised of glass and
as standard. The values given in parentheses after SI units are
interlayer which may include inks, coatings, frit, or other
provided for information only and are not considered standard.
materials adhered to the glass surface to which interlayers may
bond.
1.5 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the
3.2.4 laminate(s), n—two pieces of glass bonded together
responsibility of the user of this standard to establish appro-
by a interlayer
priate safety, health, and environmental practices and deter-
3.2.5 pummel, v—the act of systematically striking the
mine the applicability of regulatory limitations prior to use.
laminatedglasssamplewithadefinedhardobjectsuchasaball
1.6 This international standard was developed in accor-
peen hammer.
dance with internationally recognized principles on standard-
ization established in the Decision on Principles for the 3.2.6 pummel box, n—an enclosed area in which glass
Development of International Standards, Guides and Recom-
specimens are pummeled, having a primary function of con-
mendations issued by the World Trade Organization Technical taining glass particles and dust coming from pummeling
Barriers to Trade (TBT) Committee.
laminates; a secondary function of providing a frame on which
to mount lighting to aid in the visual evaluation; this may be an
2. Referenced Documents
enclosed room; acoustic damping material may be used on the
2
2.1 ASTM Standards:
walls of the box or room.
C162 Terminology of Glass and Glass Products
3.2.7 pummel rating, n—visually assessed amount of glass
versus interlayer characterized as high, medium, low or zero
1
This test method is under the jurisdiction of ASTM Committee C14 on Glass
and abbreviated PU.
and Glass Products and is the direct responsibility of Subcommittee C14.08 on Flat
Glass.
3.2.8 short wave UV lamp, n—lamp capable of emitting
Current edition approved Sept. 1, 2021. Published October 2021. DOI: 10.1520/
short wave UV light in the range of 254 nm.
C1908-21.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
3.2.9 split shot, n—small spherical piece of lead or tin, size
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
number 5, which is cut part way through; typically used to
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. weight a fishing line.
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C1908 − 21
3.2.10 strike plate, n—a hard metal flat surface with a 45° 7. Hazards
angle which allows the pulverized glass to slide aw
...