ISO 527-3-2018 pdf free.Plastics — Determination of tensilepropertiesa —Test conditions for films and sheets.
The test specimens described in 6.1.1 shall be cut or punched so that the edges are smooth andfree from notches; examination with a low-power magnifier is recommended to check the absence ofnotches. Razor blades, suitable paper cutters, scalpels or other devices capable of cutting the specimensto the proper width and producing straight, clean, parallel edges with no visible imperfections shall beused. Punch dies shall be kept sharp by regular honing, and a suitable backing material shall be usedwith punch dies to ensure a clean-cut edge.
The test specimens described in 6.1.2 shall be obtained by the use of punch dies, using suitablebacking material to ensure a clean-cut edge. Dies shall be kept sharp by regular honing, and the edges ofthe specimen shall be examined with a low-power magnifier to ensure the absence of notches. Discardany specimen with obvious imperfections on the cut edges.
The marking device used to produce the gauge marks shall have two parallel edges which are groundsmooth and true,0,05 mm to 0,10 mm wide at the edge and bevelled at an angle of not more than 15.An ink stamp may also be used to apply ink to the area of the gauge marks, before or after producingthem with the marking device, using an ink of a suitable contrasting colour that has no deleteriouseffect on the film being tested.
Discard any test specimen with obvious imperfections on the cut edges.
The properties of certain types of film material may vary with direction in the plane of the film(anisotropy).In such cases, it is essential to prepare two groups of test specimens with their major axesrespectively parallel and perpendicular to the direction of orientation of the film.
The precision of the test method is not known because interlaboratory data are not available. Wheninterlaboratory data are obtained, a precision statement will be added at the following revision.ISO 527 pdf download.