DIN ISO 7765-2-2009 塑料薄膜和薄板 用自由落体法测定耐冲击性 第2部分:仪器冲孔试验

标准号：DIN ISO 7765-2-2009
中文标准名称：塑料薄膜和薄板 用自由落体法测定耐冲击性 第2部分:仪器冲孔试验
英文标准名称：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
标准类型：G33
发布日期：1999/12/31 12:00:00
实施日期：1999/12/31 12:00:00
中国标准分类号：G33
国际标准分类号：83.140.10
引用标准：ISO 291-1977;ISO 4593-1993;ISO 6603-2-1989;ISO 7765-1-1988
适用范围：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.