ASTM D6737-2001(2006) Standard Test Method for Bulk Density of Tapered Paintbrush Filaments《锥形漆刷丝松密度的标准测试方法》.pdf
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1、Designation: D 6737 01 (Reapproved 2006)Standard Test Method forBulk Density of Tapered Paintbrush Filaments1This standard is issued under the fixed designation D 6737; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of la
2、st revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon (e) indicates an editorial change since the last revision or reapproval.1. Scope1.1 This test method covers a procedure for measuring theweight of filaments per unit volume.1.2 This method is applicable
3、only to monofilament withtapered longitudinal profiles.1.3 The values given in SI units are to be regarded as thestandard. The values given in parentheses allow for calculatingthe bulk density in g/in.3, a commonly used form.1.4 This standard does not purport to address all of thesafety concerns, if
4、 any, associated with its use. It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2. Summary of Test Method2.1 The weight, length and diameter of a bundle of taperedfilamen
5、ts are measured, and the bundle density is calculated.3. Significance and Use3.1 Filaments are available in a variety of cross-sections andmaterials.Ameasure of bulk density permits the brushmaker toestimate the weight of filament required to prepare a givennumber of brushes.4. Apparatus4.1 The appa
6、ratus requires some machining, and is as-sembled as shown in Fig. 1 from the following equipment:4.1.1 Air Valve.24.1.2 Miniature Air Cylinder, dual acting, heavy duty.34.1.3 Assorted parts shown in Fig. 1 are machined from 304stainless steel and assembled as shown along with the air valveand cylind
7、er just described. The Pi tape4must be fixed in placeso that it reads accurately the diameter of a metal calibrationstandard that is 50.8-mm (2.00-in.) diameter.5The Pi tape ismounted on an adjustable plate for calibration.4.2 Weighing Device, accurate to 0.1 g to weigh the bundle.4.3 Graduated, Lin
8、ear Scale, accurate to 0.5-mm (0.02-in.)to measure the bundle length.4.4 Air Supply, with pressure regulator set for 40 psig.4.5 Calibration Standard, 50.8-mm (2.00-in.) in diameter.65. Sampling, Test Specimens and Test Units5.1 The test result depends on the cross-sectional shape, thepolymer, and t
9、he length of the bundle selected for the test. Toa lesser extent, it also depends on the filament diameter, sincethin filaments pack more efficiently than large ones.5.2 The device, as pictured in Fig. 1, is designed to measurediameters ranging from 30.5 to 52.3 mm (1.20 to 2.06 in.).Make sure that
10、both ends to be measured are within this range.5.3 Calculations are based on conical bundle shape.6. Procedure6.1 Select a sample bundle of approximately 50-mm (2.0-in.) diameter. Filament may be removed from a sample so thebundle diameter falls within the scale range 30.5 to 52.3-mm(1.20 to 2.06-in
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