標準號：DIN ISO 7765-2-2009
中文標準名稱：塑料薄膜和薄板 用自由落體法測定耐沖擊性 第2部分:儀器沖孔試驗
英文標準名稱：Plastics film and sheeting - Determination of impact resistance by the free-falling dart method - Part 2: Instrumented puncture test (ISO 7765-2:1994); English version of DIN ISO 7765-2:2009-02
標準類型：G33
發布日期：1999/12/31 12:00:00
實施日期：1999/12/31 12:00:00
中國標準分類號：G33
國際標準分類號：83.140.10
引用標準：ISO 291-1977;ISO 4593-1993;ISO 6603-2-1989;ISO 7765-1-1988
適用范圍：1.1 The impact-penetration test described in thetwo parts of this International Standard is used for theassessment of plastic films and thin sheets (herein-after referred to as films) under an impact stress ap-plied at right angles to the plane of the film.1.2 Part 1 of this International Standard can be usedif it is sufficient to characterize the impact behaviourof the film by an impact-failure energy. Part 2 is usedif a force-deformation or a force-time diagram, re-corded at practically constant velocity of the striker, isnecessary for characterization of the impact behav-iour. This applies if:-- measured quantities derivable only from this dia- gram are required or-- only a small number of test specimens are avail- able.1.3 The test method is applicable to films of up to1 mm thickness and makes it possible to compareimpact-penetration forces, biaxial deformabilities andenergy-absorption capacities of films. Furthermore, ifrequired, the transition region between brittle andtough behaviour of the film under the conditions oftesting can be determined by varying the temperatureor the penetration velocity or the relative humidity(see also annex B).NOTE 1 For thicknesses greater than 1 mm, ISO 6603-2should be used.1.4 The test results are comparable only if the con-ditions for preparation of specimens, their thicknessand surfaces, and the test conditions are identical.Comprehensive evaluation of the reaction to impactstress requires that the determinations are made asfunctions of deformation rate and temperature fordifferent material variables, such as crystallinity andmoisture content.