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ASTM D6737-12(2017)

(Test Method)

Standard Test Method for Bulk Density of Tapered Paintbrush Filaments

Standard Test Method for Bulk Density of Tapered Paintbrush Filaments

SIGNIFICANCE AND USE
3.1 Filaments are available in a variety of cross-sections and materials. A measure of bulk density permits the brushmaker to estimate the weight of filament required to prepare a given number of brushes.
SCOPE
1.1 This test method covers a procedure for measuring the weight of filaments per unit volume.  
1.2 This method is applicable only to monofilament with tapered longitudinal profiles.  
1.3 The values given in SI units are to be regarded as the standard. The values given in parentheses are for information only.  
1.4 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 and health practices and determine the applicability of regulatory limitations prior to use.  
1.5 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-May-2017
ICS
87.100 - Paint coating equipment
Technical Committee
D01 - Paint and Related Coatings, Materials, and Applications
Drafting Committee
D01.61 - Paint Application Tools
Current Stage
Ref Project

Relations

Replaces
ASTM D6737-12 - Standard Test Method for Bulk Density of Tapered Paintbrush Filaments
Effective Date
01-Jun-2017

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ASTM D6737-12(2017) - Standard Test Method for Bulk Density of Tapered Paintbrush FilamentsASTM D6737-12(2017) - Standard Test Method for Bulk Density of Tapered Paintbrush Filaments
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ASTM D6737-12(2017) - Standard Test Method for Bulk Density of Tapered Paintbrush Filaments
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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: D6737 − 12 (Reapproved 2017)
Standard Test Method for
Bulk Density of Tapered Paintbrush Filaments
This standard is issued under the fixed designation D6737; 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 4.1.2 Miniature Air Cylinder, dual acting, heavy duty.
4.1.3 AssortedpartsshowninFig.1aremachinedfrom304
1.1 This test method covers a procedure for measuring the
stainlesssteelandassembledasshownalongwiththeairvalve
weight of filaments per unit volume.
and cylinder just described.The Pi tape must be fixed in place
1.2 This method is applicable only to monofilament with
so that it reads accurately the diameter of a metal calibration
tapered longitudinal profiles.
standard that is 50.8-mm (2.00-in.) diameter. The Pi tape is
1.3 The values given in SI units are to be regarded as the mounted on an adjustable plate for calibration.
standard. The values given in parentheses are for information
4.2 Weighing Device, accurate to 0.1 g to weigh the bundle.
only.
4.3 Graduated, Linear Scale, accurate to 0.5-mm (0.02-in.)
1.4 This standard does not purport to address all of the
to measure the bundle length.
safety concerns, if any, associated with its use. It is the
4.4 Air Supply, with pressure regulator set for 40 psig.
responsibility of the user of this standard to establish appro-
priate safety and health practices and determine the applica-
4.5 Calibration Standard, 50.8-mm (2.00-in.) in diameter.
bility of regulatory limitations prior to use.
5. Sampling, Test Specimens and Test Units
1.5 This international standard was developed in accor-
dance with internationally recognized principles on standard-
5.1 The test result depends on the cross-sectional shape, the
ization established in the Decision on Principles for the
polymer, and the length of the bundle selected for the test. To
Development of International Standards, Guides and Recom-
a lesser extent, it also depends on the filament diameter, since
mendations issued by the World Trade Organization Technical
thin filaments pack more efficiently than large ones.
Barriers to Trade (TBT) Committee.
5.2 The device, as pictured in Fig. 1, is designed to measure
diameters ranging from 30.5 to 52.3 mm (1.20 to 2.06 in.).
2. Summary of Test Method
Make sure that both ends to be measured are within this range.
2.1 The weight, length and diameter of a bundle of tapered
5.3 Calculations are based on conical bundle shape.
filaments are measured, and the bundle density is calculated.
6. Procedure
3. Significance and Use
6.1 Select a sample bundle of approximately 50-mm (2.0-
3.1 Filamentsareavailableinavarietyofcross-sectionsand
in.) diameter. Filament may be removed from a sample so the
materials.Ameasureofbulkdensitypermitsthebrushmakerto
bundle diameter falls within the scale range 30.5 to 52.3-mm
estimate the weight of filament required to prepare a given
(1.20 to 2.06-in.). One convenient method to adjust the sample
number of brushes.
diameter to the desired range is to fill a 50-mm (2.0-in.) inside
diameter tube. If the sample is too small, like samples may be
4. Apparatus
combined to adjust the bundle diameter to the desired range.
4.1 The apparatus requires some machining, and is as-
6.2 With rubber bands holding the bundle together, roll it
sembled as shown in Fig. 1 from the following equipment:
between the palms of the hands four times to allow the
4.1.1 Air Valve.
filaments to nest. Place the larger end of the bundle inside the
loop of measuring tape in the device shown in Fig. 2.
This test method is under the jurisdiction of ASTM Committee D01 on Paint
3 3
and Related Coatings, Materials, andApplications and is the direct responsibility of MiniatureaircylindersuchasModel047DXP, ⁄4in.(19.0mm)bore7in.(178
Subcommittee D01.61 on Paint Application Tools. mm)stroke,dualacting,heavydutyavailablefromBimbaManufacturingCompany,
Current edition approved June 1, 2017. Published June 2017. Originally Monee, IL 60449-0068, or equivalent, has been found suitable for this purpose.
4 1
approved in 2001. Last previous edition approved in 2012 as D6737–12. DOI: Pi tape ⁄4in.(6mm)×6ft (1.8 m) with 0.01 in. graduations. Lufkin model
10.1520/D6737-12R17. W606P, or equivalent, has been found suitable for this purpose.
Air valve such as Model 6676 available from Hunt Valve Co., 1913
...

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