1、 l Designation:D 11 64-60(Reapproved 1973)Standard Test Method for Technical Association of Pulp and Paper Industry Tentative Standard Method T 472m-51 RING CRUSH OF PAPERBOARD1 This Standard.i issued uder th:fixed designation D 1164;the number immediately following the designation indicates the yea
2、r of ongtnal adopt10n or,tn the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.I.Scope 1.1 This method covers the measurement of the resistance of paperboard to edgewise compression.It is intended only for paper-board having a thickness not e
3、xceeding 0.036 in.(0.9 mm).2.Significance 2.1 Corrugated and solid fiberboard con-tainers are subject to crushir;ig forces in ship-ment.This test is used for two purposes in the evaluation of the paperboard to be used as components of such fiberboard containers:(1)to indicate edgewise rigidity of th
4、e board so that manufacturing processes may be con-trolled to secure the desired results,and(2)to indicate the probable crushing resistance of the finished container.3.Apparatus 3.1 Compression Machine-The apparatus shall consist essentially of a compression testing machine having the following:3.1.
5、1 An upper and a lower platen,one of which may be fixed and the other removable.The surfaces of the platens shall remain smooth,flat,and parallel to each other within I part in 2000 throughout the test and shall be so mounted as not to have more than 0.002 in.(0.05 mm)movement in the horizontal dire
6、ction,3.l.2 Means for exerting force on a spec-imen placed between the two platens.This may be accomplished either by causing the movable platen to approach the fixed platen t a uniform speed or applying a constantly mcreasing pressure against the movable platen without necessarily causing motion th
7、ereof until collapse of specimen.In either case,the force applied to the specimen shall be devel-oped at a rate equivalent to 25 5 lbf(l 1 l 22 N)/s when the platens are in contact,3.1.3 Means for measuring and indicating the applied load within I lbf(4.4 N),and 3.1.4 The machine should have a capac
8、ity of not less than 300 lbf(1330 N),and the indi-cating mechanism should be such that it can be accurately checked with dead-weight loads.3.2 Specimen Holder-At the center of the lower platen of the compression testing machine there shall be positioned a specimen holder comprising a circular block
9、having an annular groove cut square,0.25 O.Ol in.(6.4 0.2 mm)deep and 1.94 0.001 in.(49.3 0.03 mm)in outside diameter.The base of the annular groove shall be parallel with the base of the block to 0.0005 in.(0.013 mm).A branch groove running from the annular groove to the edge of the block shall be
10、provided to permit insertion of the specimen.The center island created by the annular groove may be made removable and replaceable with disks of different diameters so as to vary the width of the groove to pro-vide for varying specimen thicknesses.The disk used for any particular caliper of board sh
11、all be of such a diameter that when placed in the block the resulting groove will have a width not less than 150 nor more than 175 percent of the nominal caliper of the specimen being tested.These disks may be provided with a center pin to fit a receiving hole in the center of the block.The disk is
12、then fre;to turn as the specimen is inserted through the This method is under the jurisdiction of ASTM Com-mittee D-6 on Paper and Paper Products.Current edition accepted Sept.19,1960.Originally is-sued 1951.Replaces D 1164-53.334 2095 NOTICE:This standard has either been superseded and replaced by
13、a new version or discontinued.Contact ASTM International(www.astm.org)for the latest information.branch groove.While this is the preferred de-sign,any specimen holder which provides support to both surfaces of the specimen,permits 0.25 in.(6.4 mm)of the specimen to extend above the surface of the ho
14、lder,and allows insertion without injury to the speci-men,is acceptable.3.3 Cutting Device-A device capable of accurately cutting the specimen to exact di-mensions.The edges of the specimen must be clean and sharp and absolutely parallel.The preferred method of accomplishing this is by means of a pu
15、nch and die,or,lacking this,a card cutter equipped with an adjustable out-side guide.Parallelism of the long edges of the specimen shall be such that the width dimension at the opposite ends shall be within 0.0006 in.(0.015 mm)of each other.The length shall be 6 0.005 in.(152 0.13 mm).4.Test Specime
16、n 4.1 All test specimens shall.be 6 in.(152 mm)long and 1/2 in.(12.7 mm)wide.Those cut with the long dimension perpendicular to the machine direction of the board shall be designated MD specimens;those cut with the long dimension parallel to the machine direc-tion of the board shall be designated CD or OD specimens.At least ten specimens of each of these two directions shall be cut and tested.In cutting the specimens,care shall be exer-cised to assure that:4.I.1 The long edges are parallel such
