{"id":132,"count":1,"description":"<div class=\"mt-1\">\r\n<h2 class=\"astm-type-heading--h3 mb-0 mt-0\"><b class=\"name\">Standard Test Method for Coefficient of Static and Kinetic Friction of Uncoated Writing and Printing Paper by Use of the Horizontal Plane Method<\/b><\/h2>\r\n<h3>V\u1eadt li\u1ec7u th\u1eed nghi\u1ec7m<\/h3>\r\nASTM D4917 focuses on uncoated writing and printing papers. The test evaluates how these materials slide against themselves, simulating conditions such as those in printing presses or copier machines.\r\n<h3>Quy tr\u00ecnh ki\u1ec3m tra<\/h3>\r\nThe test uses a horizontal plane setup where a sample slides against another under an applied weight. The coefficient of static friction measures the force needed to initiate movement, while the kinetic friction measures the force needed to maintain uniform sliding. This test method ensures precision, particularly for uncoated papers.\r\n<h3>Gi\u1ea3i th\u00edch k\u1ebft qu\u1ea3 x\u00e9t nghi\u1ec7m<\/h3>\r\nResults provide the coefficient of friction values. A higher static COF indicates more resistance to initial movement, while kinetic COF represents resistance during continuous motion. These values help ensure proper paper handling and feedability in machines\u200b\r\n\r\n<\/div>","link":"https:\/\/www.qualitester.com\/vi\/danh-muc-san-pham-2\/astm\/astm-d4917\/","name":"Ti\u00eau chu\u1ea9n ASTMD4917","slug":"astm-d4917","taxonomy":"product_cat","parent":99,"meta":[],"_links":{"self":[{"href":"https:\/\/www.qualitester.com\/vi\/wp-json\/wp\/v2\/product_cat\/132","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.qualitester.com\/vi\/wp-json\/wp\/v2\/product_cat"}],"about":[{"href":"https:\/\/www.qualitester.com\/vi\/wp-json\/wp\/v2\/taxonomies\/product_cat"}],"up":[{"embeddable":true,"href":"https:\/\/www.qualitester.com\/vi\/wp-json\/wp\/v2\/product_cat\/99"}],"wp:post_type":[{"href":"https:\/\/www.qualitester.com\/vi\/wp-json\/wp\/v2\/product?product_cat=132"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}