1、Designation:D780412Standard Test Method forFiber Shedding of Paint Roller Covers1This standard is issued under the fixed designation D7804;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number in parenthe
2、ses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This test method describes a procedure for determiningthe amount of releasable fibers transferred from a paint rollercover to a surface being painted.1.2 Thi
3、s test method is applicable to pile fabric paint rollercovers.1.3 Because both the application and panel evaluation aresubjective,this test method should be used only for compara-tive testing within one facility using one operator for each setof applications,as the end result assigned by different f
4、acilitiesmay not agree.1.4 The values stated in inch-pound units are to be regardedas standard.The values given in parentheses are mathematicalconversions to SI units that are provided for information onlyand are not considered standard.1.5 This standard does not purport to address all of thesafety
5、concerns,if 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.Some specifichazards statements are given in Section 7 on Hazards.2.Summary of Te
6、st Method2.1 The paint roller cover that is to be evaluated is used topaint a section of sealed test paper.After the paint film hasdried,the fibers are counted.3.Significance and Use3.1 fibers that are released during painting can lead to afinish that is aesthetically unacceptable.4.Test Specimen4.1
7、 Three identical paint roller covers,9 by 1.5 in.(228.6 by38.1 mm)diameter core.5.Apparatus5.1 Paint Roller Framedesigned for the paint roller coverbeing tested.5.2 Paint Traysuitable for the paint roller cover beingtested.6.Materials6.1 Test Paintcommercially available semi-gloss or glosspaint,iden
8、tified as to type,product number,and color.Paint tobe mixed to a uniform consistency.Results may vary whenusing different paint types.6.2 Sealed Test Paperto minimize absorption of test paint,which allows formation of paint film.Sections measuring 28in.(711.2 mm)wide by 20 in.(508 mm)long and have a
9、minimum 10-mil thickness with a basis weight of 50 lb/Mft2(250 g/m2).6.3 Tack Clothcommercially prepared cloth designed toremove dust and lint.6.4 Lighted Magnifying Glasswith 5 magnification.7.Procedure7.1 All tests are to be conducted in controlled environment.7.2 Prepare a clean,dry paint tray by
10、 wiping clean with atack cloth to remove all foreign material.Wipe paper surfaceand surrounding area with tack cloth also.7.3 Secure the two sections of sealed test paper to a flatvertical surface creating a 28 by 40 in.(711.2 by 1.016 mm)test surface.7.4 Pour fresh paint into tray.Depth of paint to
11、 be the sameas the pile height of the paint roller covers being tested.Forexample,12in.(12.7 mm)pile height cover would use12in.(12.7 mm)of paint in tray.Do not use paint that has beenexposed to fibers.7.5 Place the paint roller cover on the frame.7.6 Load the paint roller cover by using twenty back
12、 andforth strokes,ten strokes total that go into the paint tray well toload the paint.Finish with four back and forth strokes,two totalstrokes that even out the paint on the ramp of the tray,notgoing into the paint well.The paint roller cover may requirehand rotation to achiever a uniform loading.7.
13、7 Roll out the paint roller cover on the sealed test paperusing the pattern shown in Fig.1.Care should be taken to1This test method is under the jurisdiction of ASTM Committee D01 on Paintand Related Coatings,Materials,and Applications and is the direct responsibility ofSubcommittee D01.61 on Paint
14、Application Tools.Current edition approved June 1,2012.Published September 2012.DOI:10.1520/D7804-12.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 maintain consistent light pressure on the paint roller coverduring the first eleven strok
15、es.Finish with four lighter strokes,overlapping slightly.7.8 Cover as much of the test paper as possible withoutcrossing the edges.7.9 Allow the test paper with paint to dry in a verticalposition to touch.7.10 Repeat procedure following instructions 7.1 7.9 twomore times on the remaining identical p
16、aint roller covers,beingsure to use fresh paint and new tray.7.11 Place painted test panel on a flat horizontal surface ina well-lighted area and wipe with a clean piece of tack cloth.7.12 Circle and count each fiber(only lint)that is observedin the dried paint film over the entire painted surface with amagnifying glass with 5 power and fluorescent light.Recordthe results.See Fig.2 and Fig.3,magnified to show detail.7.13 The results will be recorded as number of fibers.8.Calculation or Interpret