{"id":111,"count":16,"description":"<h2>\u03a5\u03bb\u03b9\u03ba\u03cc \u03b1\u03af\u03c4\u03b7\u03c3\u03b7\u03c2<\/h2>\r\n<a href=\"https:\/\/www.astm.org\/d1709-22.html\" target=\"_blank\" rel=\"noopener\">ASTM D1709<\/a> is used to assess the impact resistance of plastic films, which are commonly used in packaging, agriculture, construction, and various consumer products. These materials include polyethylene, polypropylene, and other flexible plastic films.\r\n<h2>\u0394\u03b9\u03b1\u03b4\u03b9\u03ba\u03b1\u03c3\u03af\u03b1 \u03b4\u03bf\u03ba\u03b9\u03bc\u03ae\u03c2<\/h2>\r\n<ol>\r\n \t<li><strong>\u03a0\u03c1\u03bf\u03b5\u03c4\u03bf\u03b9\u03bc\u03b1\u03c3\u03af\u03b1 \u03b4\u03b5\u03af\u03b3\u03bc\u03b1\u03c4\u03bf\u03c2<\/strong>: Plastic film samples are prepared according to the specified dimensions and conditioning requirements.<\/li>\r\n \t<li><strong>Dart Selection<\/strong>: A hemispherical dart (tup) is selected based on the expected impact resistance of the film.<\/li>\r\n \t<li><strong>Testing Apparatus<\/strong>: The dart is dropped from a specified height onto the film sample clamped over a circular opening.<\/li>\r\n \t<li><strong>Impact<\/strong> <strong>Test<\/strong>: The dart is released to fall freely onto the film. The test can be performed using two methods:\r\n<ul>\r\n \t<li><strong>\u039c\u03ad\u03b8\u03bf\u03b4\u03bf\u03c2 \u0391<\/strong>: The dart (diameter = 38\u00b11mm) is dropped from a height of 660mm.<\/li>\r\n \t<li><strong>\u039c\u03ad\u03b8\u03bf\u03b4\u03bf\u03c2 \u0392<\/strong>: The dart (diameter = 50\u00b11mm) is dropped from a height of 1500mm.<\/li>\r\n<\/ul>\r\n<\/li>\r\n \t<li><strong>Observation<\/strong>: The test is conducted until a failure point is reached, where the film ruptures due to the impact.<\/li>\r\n<\/ol>\r\n[embed]https:\/\/youtu.be\/a3_9M0x3w7U[\/embed]\r\n<h2>\u0395\u03c1\u03bc\u03b7\u03bd\u03b5\u03af\u03b1 \u03c4\u03c9\u03bd \u03b1\u03c0\u03bf\u03c4\u03b5\u03bb\u03b5\u03c3\u03bc\u03ac\u03c4\u03c9\u03bd \u03c4\u03b7\u03c2 \u03b4\u03bf\u03ba\u03b9\u03bc\u03ae\u03c2<\/h2>\r\n<ul>\r\n \t<li><strong>Failure<\/strong> <strong>Point<\/strong>: The result is recorded as the weight of the dart at which 50% of the samples fail (break or puncture). This is often referred to as the \"impact failure weight\" or \"dart drop impact strength.\"<\/li>\r\n \t<li><strong>Statistical Analysis<\/strong>: The results can be statistically analyzed to determine the mean and standard deviation of the failure points, providing a measure of the film's impact resistance.<\/li>\r\n<\/ul>\r\n<h2>\u03a4\u03b5\u03c3\u03c4 \u03a3\u03b7\u03bc\u03b1\u03bd\u03c4\u03b9\u03ba\u03cc\u03c4\u03b7\u03c4\u03b1<\/h2>\r\n<ul>\r\n \t<li><strong>Material Performance<\/strong>: The test determines the ability of plastic films to withstand impact forces, which is crucial for applications where the films are subjected to rough handling or mechanical stress.<\/li>\r\n \t<li><strong>\u03a0\u03bf\u03b9\u03bf\u03c4\u03b9\u03ba\u03cc\u03c2 \u03ad\u03bb\u03b5\u03b3\u03c7\u03bf\u03c2<\/strong>: The results help manufacturers ensure consistent quality and performance of plastic films.<\/li>\r\n \t<li><strong>Product Development<\/strong>: The test aids in the development of new films with improved impact resistance properties.<\/li>\r\n<\/ul>\r\n<h2>\u0391\u03c0\u03b1\u03b9\u03c4\u03ae\u03c3\u03b5\u03b9\u03c2 \u03bf\u03c1\u03b3\u03ac\u03bd\u03c9\u03bd<\/h2>\r\n[caption id=\"attachment_2156\" align=\"aligncenter\" width=\"300\"]<a href=\"https:\/\/www.qualitester.com\/el\/%cf%80%cf%81%ce%bf%cf%8a%cf%8c%ce%bd\/falling-dart-impact-tester-fdt-01\/\"><img class=\"wp-image-2156 size-medium\" src=\"https:\/\/www.qualitester.com\/wp-content\/uploads\/2023\/05\/FDT-01-Falling-Drat-Impact-Tester-300x300.jpg\" alt=\"ASTM D1709 \u0394\u03bf\u03ba\u03b9\u03bc\u03b1\u03c3\u03c4\u03ae\u03c2 \u03ba\u03c1\u03bf\u03cd\u03c3\u03b7\u03c2 \u03c0\u03c4\u03ce\u03c3\u03b7\u03c2 Drat\" width=\"300\" height=\"300\" \/><\/a> <a href=\"https:\/\/www.qualitester.com\/el\/%cf%80%cf%81%ce%bf%cf%8a%cf%8c%ce%bd\/falling-dart-impact-tester-fdt-01\/\" target=\"_blank\" rel=\"noopener\">ASTM D1709 \u0394\u03bf\u03ba\u03b9\u03bc\u03b1\u03c3\u03c4\u03ae\u03c2 \u03ba\u03c1\u03bf\u03cd\u03c3\u03b7\u03c2 \u03c0\u03c4\u03ce\u03c3\u03b7\u03c2 Drat<\/a>[\/caption]\r\n<ul>\r\n \t<li><strong>Dart Assembly<\/strong>: A hemispherical dart with a specific weight and diameter.<\/li>\r\n \t<li><strong>Drop Height Apparatus<\/strong>: A mechanism to release the dart from a controlled height.<\/li>\r\n \t<li><strong>Sample<\/strong> <strong>Clamping<\/strong> <strong>Device<\/strong>: A device to securely hold the film sample over a circular opening without slippage.<\/li>\r\n \t<li><strong>\u039c\u03ad\u03c4\u03c1\u03b7\u03c3\u03b7<\/strong> <strong>Tools<\/strong>: Instruments to measure the weight of the dart and the height of the drop accurately.<\/li>\r\n<\/ul>\r\n<h2>\u03a0\u03c1\u03bf\u03c6\u03c5\u03bb\u03ac\u03be\u03b5\u03b9\u03c2<\/h2>\r\n<ul>\r\n \t<li><strong>Safety Measures<\/strong>: Proper safety measures should be in place to protect operators from the falling dart and any debris from film breakage.<\/li>\r\n \t<li><strong>\u03a0\u03c1\u03bf\u03b5\u03c4\u03bf\u03b9\u03bc\u03b1\u03c3\u03af\u03b1 \u03b4\u03b5\u03af\u03b3\u03bc\u03b1\u03c4\u03bf\u03c2<\/strong>: Samples should be conditioned according to specified environmental conditions to ensure consistent results.<\/li>\r\n \t<li><strong>\u0392\u03b1\u03b8\u03bc\u03bf\u03bd\u03cc\u03bc\u03b7\u03c3\u03b7<\/strong>: The testing apparatus should be regularly calibrated to maintain accuracy.<\/li>\r\n \t<li><strong>Proper Handling<\/strong>: Care should be taken to handle and prepare samples without introducing defects or stress that could affect the results.<\/li>\r\n<\/ul>\r\nBy following these guidelines, ASTM D1709 ensures reliable and reproducible testing of the impact resistance of plastic films.","link":"https:\/\/www.qualitester.com\/el\/product-category\/astm\/astm-d1709\/","name":"ASTM D1709","slug":"astm-d1709","taxonomy":"product_cat","parent":99,"meta":[],"_links":{"self":[{"href":"https:\/\/www.qualitester.com\/el\/wp-json\/wp\/v2\/product_cat\/111","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.qualitester.com\/el\/wp-json\/wp\/v2\/product_cat"}],"about":[{"href":"https:\/\/www.qualitester.com\/el\/wp-json\/wp\/v2\/taxonomies\/product_cat"}],"up":[{"embeddable":true,"href":"https:\/\/www.qualitester.com\/el\/wp-json\/wp\/v2\/product_cat\/99"}],"wp:post_type":[{"href":"https:\/\/www.qualitester.com\/el\/wp-json\/wp\/v2\/product?product_cat=111"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}