Designation:D 3167–03a (Reapproved 2004)
Standard Test Method for
Floating Roller Peel Resistance of Adhesives 1
This standard is issued under the fixed designation D 3167;the number immediately following the designation indicates the year of original adoption or,in the ca of revision,the year of last revision.A number in parenthes indicates the year of last reapproval.A superscript epsilon (e )indicates an editorial change since the last revision or reapproval.
INTRODUCTION
四年级上册语文作文
美式牛肉汉堡
The purpo of this test method is to provide for the determination of the metal-to-metal peel strength of adhesives by a method that will provide good reproducibility at low-,as well as at highstrength levels and yet allow for a simple method of test specimen preparation and testing.The accuracy of the results of strength tests of adhesive bonds will depend on the conditions under which the bonding process is carried out.Unless otherwi agreed upon between the manufacturer and the purchar,the bonding conditions shall be prescribed by the manufacturer of the adhesive.In order to ensure that complete information is available to the individual conducting the tests,the manufacturer of the adhesive shall furnish numerical values and other specific information for each of the following variables:
(1)Procedure for preparation of the surfaces prior to application of the adhesive,the cleaning and drying of metal surfaces,and special surface treatments such as sanding,which are not specifically limited by the pertinent test method.
(2)Complete mixing directions for the adhesive.
(3)Conditions for application of the adhesive,including the rate of spread or thickness of film,number of coats to be applied whether to be applied to one or both surfaces,and the conditions of drying where more than one coat is required.
(4)Asmbly conditions before application of pressure,including the room temperature and length of time.
(5)Curing conditions,including the amount of pressure to be applied,the length of time under pressure,and the temperature of the asmbly when under pressure.It should be stated whether this temperature is that of the glue line,or of the atmosphere at which the asmbly is to be maintained.(6)Conditioning procedure before testing,unless a standard procedure is specified,including the length of time,temperature,and relative humidity.
A range may be prescribed for any variable by the manufacturer of the adhesive,if it can be assumed by the test operator that any arbitrarily chon value within such a range or any combination of such values for veral variables will be acceptable to both the manufacturer and the purchar of the adhesive.
1.Scope
1.1This test method covers the determination of the relative peel resistance of adhesive bonds between one rigid adherend and one flexible adherend when tested under specified condi-tions of preparation and testing.
600字初中作文
1.2A variation in thickness of the adherends will generally influence the test values.For this reason,the thickness of the sheets ud to make the test specimens shall be specified in the material specification.When no thickness is specified,the flexible adherend shall be 0.63mm (0.025in.)thick and the rigid adherend shall be 1.63mm (0.064in.)thick.
1.3The values stated in SI units are to be regarded as the standard.The values given in parenthes are for information only.杨修鸡肋事件
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This test method is under the jurisdiction of ASTM Committee D14on Adhesives and is the direct responsibility of Subcommittee D14.80on Metal Bonding Adhesives.
Current edition approved April 1,2004.Published April 2004.Originally approved in 1973.Last previous edition approved in 2003as D 3167–03a.
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1.4This standard does not purport to address all of the safety concerns,if any,associated with its u.It is the responsibility of the ur of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to u.
2.Referenced Documents 2.1ASTM Standards:2
B 209Specification for Aluminum and Aluminum-Alloy Sheet and Plate
D 907Terminology of Adhesives
D 1781Test Method for Climbing Drum Peel for Adhesives
E 4Practices for Force Verification of Testing Machines 3.Terminology
3.1Definitions —Many of the terms ud in this test method are defined in Terminology D 907.
4.Summary of Test Method
4.1This test method consists of testing laminated or bonded adherends,where one adherend is made to be rigid and the other adherend is made to be flexible,by peeling of the flexible adherend from the rigid adherend at a controlled angle of peel using the test fixture shown in Fig.1.
5.Significance and U
5.1U this test method for acceptance and process control testing.This test method may be ud as an alternative to Test Method D 1781when that facility is not available.This test method is considered more vere since the angle of peel is greater.
6.Apparatus
6.1Testing Machine ,conforming to the requirements of Practices E 4.Select a testing machine that is autographic with chart capability,that reads and records in millimetres (inches)of paration as one coordinate and applied load as the other coordinate,the applied load accurate to within 61%.Addi-tional capabilities of the machine are a crosshead rate of 152mm/min (6in./min),with lf-aligning grips to hold the specimen,and where the breaking load of the specimens falls between 15and 85%of the full-scale machine capacity.The grips need to engage the outer 25.4mm (1in.)of the flexible adherend firmly and when the load is applied,the direction of the applied pull needs to be thr
ough the center line of the grip asmbly.
6.2Attach a fixture as shown in Fig.1to one of the testing machine cross arms and ensure that the 1-in.diameter rollers of the test fixture roll freely.
7.Sample Preparation嘴巴上长痣
7.1Laminated test panels (e Fig.2)consist of two adherends properly prepared and bonded together in accor-dance with the adhesive manufacturer’s recommendations.
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website.
FIG.1Roller Drum Peel Test
Fixture
7.2Unless otherwi specified,u clad aluminum alloy conforming to the specification for aluminum-alloy sheet and plate (Specification B 209)Alloy 2024-T3.
7.3Cut the bonded panels into 12.7-mm (0.5-in.)wide test specimens (e Fig.2)by a means that is not deleterious to the bond.The u of edge members depends upon the desire to measure peel strengths in this area.The method of cutting test specimens is controlled by adherend and adhesive composi-tions and the accuracy desired.Shearing,milling,and band-saws can all be ud successfully.Bend the unbonded end of the flexible adherend,perpendicular to the rigid adherend,for clamping in the grip of the testing machine.Select two specimens for each temperature tested from e
ach of three bonded panels.
N OTE 1—Direct comparison of different adhesives may be made only when specimen construction and test conditions are identical.
N OTE 2—Within the limitations impod by 7.3,other specimen widths may be ud,provided the test machine grip and peel test fixtures are of ample width to apply the load uniformly across the width of the adherends.
N OTE 3—Direct comparison of different adhesives may be made only when the angle of peel is identical.The operator must ascertain that the flexible adherend is bending over the mandrel and not at some irregular angle.
8.Test Method
8.1Inrt the test specimen into the peel test fixture as shown in Fig.1,with the unbonded end of the flexible adherend gripped in the test machine jaw.Peel the specimen at 152-mm/min (6-in./min)bond paration rate by applying the load at a constant head speed of 152mm/min.If the backup plate bends or is distorted during the test,it is recommended that the specimen be redesigned with a backup member stiff enough to ensure even peel.
8.2During the peel test,make an autographic recording of load versus head movement (load versus distance peeled).8.3Record the load over at least a 7.6-mm (3-in.)length of the bond line,disregarding the first 2.54mm (1in.)of peel.
9.Calculation
9.1Determine from the autographic curve,or at least 76.2mm (3in.)of peeling (disregarding the first 25.4mm (1in.)),the average peeling load in pounds-force per inch (or kilone-wtons per metre)of the specimen width required to parate the adherends.It is preferred that the average load be determined from the curve by means of a planimeter.
N OTE 4—In ca a planimeter is not ud,the average may be calculated as the average of load readings taken at fixed increments of crosshead motion.For example,the load may be recorded at each 12.7-mm (1⁄2-in.)interval of crosshead motion (discarding the first 25.4mm (1in.))until at least six readings have been attained.
10.Report
10.1Report the following information:
大龟10.1.1Complete identification of the adhesive tested includ-ing type,source,manufacturer’s code number,batch or lot number,form,etc.
10.1.2Complete identification of adherends ud,including material thickness,surface preparation,and orientation.
10.1.3Description of bonding process,including method of application of adhesive,glueline thickness,drying or precuring conditions (where applicable),curing time,temperature,and pressure.
10.1.4The average thickness of adhesive layer after forma-tion of the joint shall be reported within 0.0127mm (0.0005in.).The method of obtaining the thickness of adhesive layer shall be described including procedure,location of measure-ments,and range of measurements.
10.1.5Complete description of the test specimen,including dimensions and construction of the test specimen,conditions ud for cutting individual test specimens,number of test panels reprented,and number of individual test specimens.10.1.6Conditioning procedure prior to testing.10.1.7Testing temperature.
10.1.8Type of test machine and crosshead paration rate
aquatics
ud.
N OTE 1—A 38.1to 74.2-mm (1.5to 3.0-in.)shim can be ud to facilitate the start of peel.
FIG.2Test Panel and Test
Specimen
10.1.9Method of recording load and determining average load.
10.1.10Average,maximum,and minimum peeling load values for each individual specimen.
10.1.11Average peel strength in pounds-force per inch(or kilonewtons per metre)of width for each combination of materials and constructions under test.
10.1.12Type of failure,that is,cohesive failure within the adhesive or adherend or adhesion to the adherend,or combi-nation thereof,for each individual specimen.11.Precision and Bias
11.1A precision and bias for this test is being determined and will be available by September2007.
12.Keywords
12.1adhesives;asmblies;bonds;laminates;metal;peel; roller
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