compounds,1.9mm (0.075in.);and cotton duck,627.4gm/m 2
一年级音乐教案(30oz/yd 2).Other special materials,as well as the standard
materials,are to be completely identified in the test report as
specified in Section 10.
5.4Test at least ten test specimens for each adhesive.
5.5Discard any specimen who test result is out of line due
久而久之to some obvious flaw and retest.
6.Preparation of Test Specimen
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6.1Precondition or prepare the surface of the area to be
bonded in accordance with the recommendations of the manu-
facturer of the adhesive.
6.2Bond the specimens in accordance with the procedure
and recommendations as outlined by the manufacturer of the
adhesive.
6.3While individual specimens may be prepared,it is
recommended that specimens be cut from bonded panels
approximately 152.4mm (6in.)in width as shown in Fig.1(b ),
so that five standard 25-mm (1-in.)wide specimens are
obtained from each panel.
7.Conditioning
7.1Condition all specimens for 7days by exposure to a
relative humidity of 5062%at 2361°C (73.462°F)or
until equilibrium is reached,except where the adhesive manu-
facturer may specify such an aging period to be unnecessary or
a shorter period to be adequate.
7.2Special conditioning procedures may be ud by agree-
ment between the purchar and the manufacturer.
8.Procedure
8.1Conduct the test as soon as possible after removing the
test specimens from the conditioning atmosphere and prefer-ably under the same conditions.8.2Separate the free end of the 25-mm (1-in.)wide flexible member by hand from the other member for a distance of about 1in.Place the specimen in the testing machine by clamping the
free end of the 8-in.long member in one grip,turning back the free end of the flexible member and clamping it in the other grip as shown in Fig. 2.Attach the parated end of the specimen,with all parate parts except the one under test curely gripped,to the recording head by means of a clamp using care to adjust it symmetrically in order that the tension is distributed uniformly.Maintain the specimen during the test approximately in the plane of the clamps.This may be done either by attaching the minimum weight required to the free end of the specimen or by holding the specimen against an alignment plate (Fig.2)attached to the stationary clamp.In either ca,take into account the added weight in determining the load causing paration.Grip the 1-in.wide flexible member symmetrically and firmly without twisting in the power-actuated clamp.Adjust the autographic mechanism and chart to zero and start the machine.Strip the parating member from the specimen approximately at an angle of 180°and continue the paration for a sufficient distance to indicate the peel or stripping value.Peel at least one half of the bonded area,even though a peel or stripping value may be indicated before this point.9.Calculation 9.1Determine the actual peel or stripping strength by drawing on the autographic chart the best average load line that will accommodate the recorded curve.Report the load so indicated,corrected for any tare weight which may have been ud with the specimen as described in 8.2expresd in kilograms per millimetre (pounds per inch)of width for paration at 152.4mm (6in.)/min,as the peel or stripping strength for the particular specime
n under test.9.2For each ries of tests,calculate the arithmetic mean of all the values,obtained and report as the “average value.”10.Report 10.1Report the
following:(a )Test Specimen (b )Specimens from Bonded Panel English/Metric Equivalents
< 1252516152.412
高二下学期班主任工作计划305
FIG.阳光空气水
1Test Specimen
FIG.2
采购经理英文Specimen Under Test
10.1.1Complete identification of the adhesive and speci-
men tested,including types,source,manufacturer’s code
numbers,form,etc.,
10.1.2Method of preparing test specimens,including mix-
ing and dispensing of adhesive,
10.1.3Conditioning procedure ud,
10.1.4Testing room conditions,
10.1.5Number of specimens tested,
代理协议合同范本10.1.6Speed of testing,
10.1.7Average value of peel or stripping strength,
10.1.8Maximum and minimum strength values of the
ries,10.1.9Individual test values,individual autographic charts,and other statistical data requested by the purchar,and 10.1.10Type of failure.11.Precision and Bias 11.1A precision and bias statement does not exist for this test method becau resources necessary for round-robin test-ing have not been forthcoming.12.Keywords 12.1adhesive bonding;peel strength;stripping strength
The American Society for Testing and Materials takes no position respecting the validity of any patent rights asrted in connection with any item mentioned in this standard.Urs of this standard are expressly advid that determination of the validity of any such patent rights,and the risk of infringement of such rights,are entirely their own responsibility.
This standard is subject to revision at any time by the responsible technical committee and must be reviewed every five years and if not revid,either reapproved or withdrawn.Your comments are invited either for revision of this standard or for additional standards and should be addresd to ASTM Headquarters.Your comments will receive careful consideration at a meeting of the responsible technical committee,which you may attend.If you feel that your comments have not received a fair hearing you should make your views known to the ASTM Committee on Standards,100Barr Harbor Drive,West Conshohocken,PA
19428.小老鼠和泡泡糖
