BS 1464:2010 pdf download – Adhesives — Determination of peel resistance of adhesive bonds — Floating roller method
1Scope
This European Standard specifies a floating roller method for the determination of the peel resistance ofadhesive bonds between one rigid adherend and one flexible adherend when tested under specifiedconditions of preparation and testing.
NOTE The use the floating roller produces more constant numerical data than other peel methods, but it should notbe expected that the flexible adherend will conform to the surface of the roller.
SAFETY STATEMENT—Persons using this document should be familiar with the normal laboratory practice,if applicable. This document does not purport to address all of the safety problems, if any, associated with itsuse. lt is the responsibility of the user to establish appropriate safety and health practices and to ensurecompliance with any regulatory conditions.
ENVIRONMENTAL STATEMENT — lt is understood that some of the material permitted in this standard mayhave negative environmental impact.As technological advantages lead to acceptable alternatives for thesematerials, they will be eliminated from this standard to the extent possible.
At the end of the test, the user of the standard should take care to carry out an appropriate disposal of thewastes, according to local regulation.
Normative references
The following referenced documents are indispensable for the application of this document. For datedreferences,only the edition cited applies.For undated references，the latest edition of the referenceddocument (including any amendments) applies.
EN 923:2005,Adhesives – Terms and definitions
EN ISO 291, Plastics – Standard atmospheres for conditioning and testing (1So 291:2008)EN ISO 10365,Adhesives – Designation of main failure patterns (IsO 10365:1992)
3Terms and definitions
For the purposes of this document, the terms and definitions given in EN 923:2005 and the following apply.3.1
peel resistance
average force per unit test specimen width, measured along the bond line, required to separate progressivelythe two members of a bonded test specimen under specified conditions of test
NOTE lt is expressed in newtons per millimetre of width (N/mm).
3.2
wet-peel resistance
peel resistance after application of water containing a wetting agent
4 Apparatus
4.1 Tensile testing machine 1) , capable of maintaining a pre-determined constant crosshead rate to be reported in the test report (preferred rate: 100 mm/min). It shall be provided with a suitable self-aligning grip to hold the test specimen. The jaws of this grip shall firmly engage the outer 25 mm of the end of the flexible adherend. The grip and attachments shall be so constructed that they will move into alignment with the test specimen as soon as the force is applied, so that the flexible member of the test specimen will coincide with the direction of the applied pull through the centre line of the grip assembly. The machine shall be autographic, giving a chart that can be read in terms of millimetres of crosshead movement as one coordinate and applied force as the other coordinate. All equipment shall be calibrated regularly. It is recommended that equipment should be essentially free of inertial forces during use. The machine shall permit the measurement and recording of the applied force with an accuracy of ± 1 %.
4.2 Peel test fixture, for supporting the test specimen (see Figure 1). The fixture shall be attached to one of the cross-arms of testing machine (4.1). The 25 mm diameter rollers on the test fixture shall roll freely. The angle determined by the rollers and the use of dual roller bearings are critical and the rollers shall therefore be carefully maintained.
5 Test specimens
5.1 Test specimens of the dimensions shown in Figure 2 may be prepared individually or cut from bonded panels. Laminated test panels, or individual test specimens, shall consist of two adherends properly prepared and bonded together.
5.2 The adherends and the surface treatment shall be in accordance with the intended application and process. The adhesive shall be applied in accordance with the manufacturer’s recommendations to obtain an optimum bond with minimum of variations. NOTE Direct comparison of different adhesives can be made only when test specimen construction, adherend materials and dimension and test conditions are identical.