{"id":9837,"date":"2026-02-24T15:11:44","date_gmt":"2026-02-24T07:11:44","guid":{"rendered":"https:\/\/www.packqc.com\/standard\/astm-d3420-2\/"},"modified":"2026-04-16T09:53:06","modified_gmt":"2026-04-16T01:53:06","slug":"astm-d3420","status":"publish","type":"standard","link":"https:\/\/www.packqc.com\/vi\/standard\/astm-d3420\/","title":{"rendered":"Ti\u00eau chu\u1ea9n ASTMD3420"},"content":{"rendered":"<h2 class=\"wp-block-heading\">Hi\u1ec3u v\u1ec1 ASTM D3420 v\u00e0 t\u1ea7m quan tr\u1ecdng c\u1ee7a n\u00f3<\/h2>\n\n\n\n<p>ASTM D3420 l\u00e0 ti\u00eau chu\u1ea9n \u0111\u01b0\u1ee3c c\u00f4ng nh\u1eadn r\u1ed9ng r\u00e3i \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh <em data-start=\"507\" data-end=\"561\">Kh\u1ea3 n\u0103ng ch\u1ecbu va \u0111\u1eadp c\u1ee7a v\u1eadt li\u1ec7u m\u00e0ng nh\u1ef1a<\/em>N\u00f3 m\u00f4 ph\u1ecfng c\u00e1c \u0111i\u1ec1u ki\u1ec7n va ch\u1ea1m trong th\u1ef1c t\u1ebf \u0111\u1ec3 \u0111\u00e1nh gi\u00e1 \u0111\u1ed9 b\u1ec1n c\u1ee7a m\u00e0ng, \u0111\u1eb7c bi\u1ec7t l\u00e0 cho c\u00e1c \u1ee9ng d\u1ee5ng trong \u0111\u00f3ng g\u00f3i, y t\u1ebf v\u00e0 h\u00e0ng ti\u00eau d\u00f9ng. H\u01b0\u1edbng d\u1eabn n\u00e0y gi\u1ea3i th\u00edch c\u00e1ch th\u1ef1c hi\u1ec7n th\u1eed nghi\u1ec7m b\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng m\u1ed9t <strong data-start=\"760\" data-end=\"791\">M\u00e1y th\u1eed va \u0111\u1eadp b\u1eb1ng qu\u1ea3 l\u1eafc phim<\/strong>, ch\u1eb3ng h\u1ea1n nh\u01b0 <strong data-start=\"805\" data-end=\"838\">M\u00f4 h\u00ecnh Cell Instruments <a href=\"https:\/\/www.packqc.com\/vi\/product-category\/pendulum-impact-tester\/\">PIT-01<\/a><\/strong>v\u00e0 cung c\u1ea5p nh\u1eefng th\u00f4ng tin s\u00e2u s\u1eafc v\u1ec1 <strong data-start=\"871\" data-end=\"894\">Th\u1eed nghi\u1ec7m va ch\u1ea1m Spencer<\/strong>, quy tr\u00ecnh, t\u00ednh to\u00e1n v\u00e0 ph\u01b0\u01a1ng ph\u00e1p b\u00e1o c\u00e1o.<\/p>\n\n\n\n<figure class=\"wp-block-embed is-type-video is-provider-youtube wp-block-embed-youtube wp-embed-aspect-16-9 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<div class=\"ast-oembed-container\" style=\"height: 100%;\"><iframe title=\"M\u00e1y ki\u1ec3m tra va \u0111\u1eadp con l\u1eafc ASTM D3420 cho m\u00e0ng nh\u1ef1a, t\u1ea5m, m\u00e1y ki\u1ec3m tra va \u0111\u1eadp\" width=\"500\" height=\"281\" src=\"https:\/\/www.youtube.com\/embed\/vEx4esxMESw?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe><\/div>\n<\/div><\/figure>\n\n\n\n<p>C\u00e1c ph\u01b0\u01a1ng ph\u00e1p th\u1eed nghi\u1ec7m n\u00e0y \u0111\u00f3ng vai tr\u00f2 quan tr\u1ecdng trong vi\u1ec7c \u0111\u00e1nh gi\u00e1 \u0111\u1ed9 b\u1ec1n v\u00e0 ch\u1ea5t l\u01b0\u1ee3ng c\u1ee7a m\u00e0ng nh\u1ef1a v\u00e0 \u0111\u01b0\u1ee3c \u00e1p d\u1ee5ng r\u1ed9ng r\u00e3i trong nhi\u1ec1u ng\u00e0nh c\u00f4ng nghi\u1ec7p, bao g\u1ed3m \u0111\u00f3ng g\u00f3i v\u00e0 an to\u00e0n th\u1ef1c ph\u1ea9m.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Kh\u1ea3 n\u0103ng ch\u1ed1ng va \u0111\u1eadp c\u1ee7a m\u00e0ng nh\u1ef1a b\u1eb1ng ph\u01b0\u01a1ng ph\u00e1p \u0111\u1eadp qu\u1ea3 l\u1eafc: T\u1ed5ng quan v\u1ec1 th\u1eed nghi\u1ec7m<\/h2>\n\n\n\n<p>Ph\u01b0\u01a1ng ph\u00e1p n\u00e0y \u0111o l\u01b0\u1eddng <strong data-start=\"1643\" data-end=\"1665\">n\u0103ng l\u01b0\u1ee3ng (\u0111\u01a1n v\u1ecb joule)<\/strong> Y\u00eau c\u1ea7u \u0111\u1ec3 \u0111\u1ea7u qu\u1ea3 l\u1eafc h\u00ecnh b\u00e1n c\u1ea7u l\u00e0m v\u1ee1 m\u1eabu m\u00e0ng \u0111\u01b0\u1ee3c k\u1eb9p gi\u1eefa hai k\u1eb9p tr\u00f2n. Ti\u00eau chu\u1ea9n ASTM D3420 bao g\u1ed3m hai quy tr\u00ecnh:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong data-start=\"1805\" data-end=\"1821\">Quy tr\u00ecnh A:<\/strong> S\u1eed d\u1ee5ng l\u1ed7 m\u1edf 60 mm v\u00e0 \u0111\u1ea7u va ch\u1ea1m c\u00f3 \u0111\u01b0\u1eddng k\u00ednh 25,4 mm.<\/li>\n\n\n\n<li><strong data-start=\"1884\" data-end=\"1922\">Quy tr\u00ecnh B (Th\u1eed nghi\u1ec7m va ch\u1ea1m Spencer):<\/strong> S\u1eed d\u1ee5ng kh\u1ea9u \u0111\u1ed9 89 mm v\u00e0 \u0111\u1ea7u va ch\u1ea1m c\u00f3 \u0111\u01b0\u1eddng k\u00ednh 19 mm.<\/li>\n<\/ul>\n\n\n\n<p>C\u1ea3 hai quy tr\u00ecnh \u0111\u1ec1u s\u1eed d\u1ee5ng m\u1ed9t thi\u1ebft b\u1ecb \u0111\u00e3 \u0111\u01b0\u1ee3c hi\u1ec7u chu\u1ea9n. <strong data-start=\"2016\" data-end=\"2047\">M\u00e1y th\u1eed va \u0111\u1eadp b\u1eb1ng qu\u1ea3 l\u1eafc phim<\/strong> \u0110\u1ec3 \u0111o l\u01b0\u1eddng l\u01b0\u1ee3ng n\u0103ng l\u01b0\u1ee3ng \u0111\u01b0\u1ee3c truy\u1ec1n trong qu\u00e1 tr\u00ecnh va ch\u1ea1m.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Thi\u1ebft b\u1ecb th\u1eed va \u0111\u1eadp b\u1eb1ng qu\u1ea3 l\u1eafc phim: C\u00e1ch l\u1eafp \u0111\u1eb7t v\u00e0 th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt<\/h2>\n\n\n\n<p>\u0110\u1ec3 th\u1ef1c hi\u1ec7n ti\u00eau chu\u1ea9n ASTM D3420 m\u1ed9t c\u00e1ch hi\u1ec7u qu\u1ea3, h\u00e3y s\u1eed d\u1ee5ng m\u00e1y th\u1eed va \u0111\u1eadp b\u1eb1ng qu\u1ea3 l\u1eafc \u0111\u01b0\u1ee3c ch\u1ee9ng nh\u1eadn v\u00e0 tu\u00e2n th\u1ee7 c\u00e1c y\u00eau c\u1ea7u v\u1ec1 thi\u1ebft b\u1ecb c\u1ee7a ti\u00eau chu\u1ea9n. Cell Instruments\u2019 <strong data-start=\"2308\" data-end=\"2324\">M\u00f4 h\u00ecnh <a href=\"https:\/\/www.packqc.com\/vi\/product-category\/pendulum-impact-tester\/\">PIT-01<\/a><\/strong> l\u00e0 l\u1ef1a ch\u1ecdn l\u00fd t\u01b0\u1edfng cho c\u00e1c ph\u00f2ng th\u00ed nghi\u1ec7m chuy\u00ean nghi\u1ec7p, cung c\u1ea5p:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>C\u00e1c t\u00f9y ch\u1ecdn d\u1ea3i n\u0103ng l\u01b0\u1ee3ng \u0111a d\u1ea1ng (t\u1eeb 0,5 \u0111\u1ebfn 5,0 J)<\/li>\n\n\n\n<li>Hi\u1ec3n th\u1ecb analog ho\u1eb7c k\u1ef9 thu\u1eadt s\u1ed1<\/li>\n\n\n\n<li>H\u1ec7 th\u1ed1ng k\u1eb9p O-ring \u0111\u1ec3 ng\u0103n ch\u1eb7n tr\u01b0\u1ee3t<\/li>\n\n\n\n<li>C\u00e1c qu\u1ea3 n\u1eb7ng c\u1ee7a \u0111\u1ed3ng h\u1ed3 l\u1eafc c\u00f3 th\u1ec3 \u0111i\u1ec1u ch\u1ec9nh cho c\u00e1c lo\u1ea1i phim kh\u00e1c nhau<\/li>\n<\/ul>\n\n\n\n<p>\u0110\u1ec3 \u0111\u1ea1t \u0111\u1ed9 ch\u00ednh x\u00e1c t\u1ed1i \u01b0u:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u0110\u1ea3m b\u1ea3o thi\u1ebft b\u1ecb \u0111\u01b0\u1ee3c c\u00e2n b\u1eb1ng \u0111\u00fang c\u00e1ch.<\/li>\n\n\n\n<li>\u0110\u1eb7t kim \u0111\u1ed3ng h\u1ed3 ho\u1eb7c c\u00e2n \u0111i\u1ec7n t\u1eed v\u1ec1 v\u1ecb tr\u00ed 0 tr\u01b0\u1edbc m\u1ed7i l\u1ea7n th\u1eed nghi\u1ec7m.<\/li>\n\n\n\n<li>Ki\u1ec3m tra hi\u1ec7u chu\u1ea9n theo <a href=\"https:\/\/store.astm.org\/d3420-21.html\" target=\"_blank\" rel=\"noopener nofollow\">Ti\u00eau chu\u1ea9n ASTMD1922<\/a> ho\u1eb7c h\u01b0\u1edbng d\u1eabn c\u1ee7a nh\u00e0 s\u1ea3n xu\u1ea5t.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">B\u00e1o c\u00e1o k\u1ebft qu\u1ea3 ki\u1ec3m tra<\/h2>\n\n\n\n<p>B\u00e1o c\u00e1o c\u1ee7a b\u1ea1n n\u00ean bao g\u1ed3m:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>X\u00e1c \u0111\u1ecbnh m\u1eabu v\u00e0 \u0111i\u1ec1u ki\u1ec7n th\u1eed nghi\u1ec7m<\/li>\n\n\n\n<li>Quy tr\u00ecnh \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng (A ho\u1eb7c B)<\/li>\n\n\n\n<li>S\u1ed1 l\u01b0\u1ee3ng m\u1eabu \u0111\u01b0\u1ee3c ki\u1ec3m tra<\/li>\n\n\n\n<li><strong data-start=\"3672\" data-end=\"3701\">N\u0103ng l\u01b0\u1ee3ng t\u00e1c \u0111\u1ed9ng trung b\u00ecnh (J)<\/strong><\/li>\n\n\n\n<li>\u0110\u1ed9 d\u00e0y trung b\u00ecnh c\u1ee7a m\u1eabu<\/li>\n\n\n\n<li><strong data-start=\"3733\" data-end=\"3769\">\u0110\u1ed9 l\u1ec7ch chu\u1ea9n (n\u1ebfu c\u1ea7n thi\u1ebft)<\/strong><\/li>\n<\/ul>\n\n\n\n<p>Ghi l\u1ea1i d\u1eef li\u1ec7u m\u00f4i tr\u01b0\u1eddng nh\u01b0 <strong data-start=\"3805\" data-end=\"3833\">Nhi\u1ec7t \u0111\u1ed9 v\u00e0 \u0111\u1ed9 \u1ea9m<\/strong> l\u00e0 y\u1ebfu t\u1ed1 quan tr\u1ecdng \u0111\u1ed1i v\u1edbi t\u00ednh t\u00e1i hi\u1ec7n.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Th\u1ef1c hi\u1ec7n th\u1eed nghi\u1ec7m t\u00e1c \u0111\u1ed9ng Spencer<\/h2>\n\n\n\n<p>C\u00e1c <strong data-start=\"2790\" data-end=\"2813\">Th\u1eed nghi\u1ec7m va ch\u1ea1m Spencer<\/strong> (Quy tr\u00ecnh B) th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng cho c\u00e1c l\u1edbp m\u00e0ng d\u00e0y h\u01a1n ho\u1eb7c b\u1ec1n h\u01a1n. D\u01b0\u1edbi \u0111\u00e2y l\u00e0 c\u00e1c b\u01b0\u1edbc th\u1ef1c hi\u1ec7n chi ti\u1ebft:<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong data-start=\"2913\" data-end=\"2936\">M\u1eabu v\u1eadt \u0111i\u1ec1u ki\u1ec7n<\/strong> \u0111\u1ebfn 23 \u00b1 2\u00b0C v\u00e0 50 \u00b1 101% RH.<\/li>\n\n\n\n<li><strong data-start=\"2969\" data-end=\"2990\">\u0110o \u0111\u1ed9 d\u00e0y<\/strong> S\u1eed d\u1ee5ng ch\u00ednh x\u00e1c b\u1eb1ng th\u01b0\u1edbc \u0111o micromet (\u00b10,00025 mm).<\/li>\n\n\n\n<li><strong data-start=\"3038\" data-end=\"3055\">C\u1eaft v\u00e0 l\u1eafp \u0111\u1eb7t<\/strong> M\u1eabu v\u1eadt \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng v\u1edbi \u0111\u01b0\u1eddng k\u00ednh 89 mm v\u00e0 k\u1eb9p O-ring.<\/li>\n\n\n\n<li><strong data-start=\"3111\" data-end=\"3132\">N\u00e2ng l\u00ean v\u00e0 th\u1ea3 ra<\/strong> \u0110\u1ed3ng h\u1ed3 l\u1eafc t\u1eeb v\u1ecb tr\u00ed kh\u00f3a.<\/li>\n\n\n\n<li><strong data-start=\"3176\" data-end=\"3198\">Quan s\u00e1t v\u00e0 ghi ch\u00e9p<\/strong> N\u0103ng l\u01b0\u1ee3ng c\u1ea7n thi\u1ebft \u0111\u1ec3 l\u00e0m v\u1ee1 m\u00e0ng.<\/li>\n\n\n\n<li><strong data-start=\"3243\" data-end=\"3281\">L\u1eb7p l\u1ea1i cho \u00edt nh\u1ea5t n\u0103m m\u1eabu.<\/strong> v\u00e0 t\u00ednh trung b\u00ecnh.<\/li>\n<\/ol>\n\n\n\n<figure class=\"wp-block-embed is-type-video is-provider-youtube wp-block-embed-youtube wp-embed-aspect-16-9 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<div class=\"ast-oembed-container\" style=\"height: 100%;\"><iframe title=\"M\u00e1y ki\u1ec3m tra va \u0111\u1eadp con l\u1eafc ASTM D3420 cho m\u00e0ng nh\u1ef1a, t\u1ea5m, m\u00e1y ki\u1ec3m tra va \u0111\u1eadp\" width=\"500\" height=\"281\" src=\"https:\/\/www.youtube.com\/embed\/vEx4esxMESw?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe><\/div>\n<\/div><\/figure>\n\n\n\n<p><strong data-start=\"3310\" data-end=\"3356\">T\u00ednh to\u00e1n n\u0103ng l\u01b0\u1ee3ng t\u00e1c \u0111\u1ed9ng cho Quy tr\u00ecnh B:<\/strong><\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p><em data-start=\"3360\" data-end=\"3379\">E = (R \/ 100) \u00d7 C<\/em><br data-start=\"3379\" data-end=\"3382\">N\u01a1i:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><em style=\"font-size: 16px;\" data-start=\"3393\" data-end=\"3396\">E<\/em> = n\u0103ng l\u01b0\u1ee3ng t\u00ednh b\u1eb1ng joule<\/li>\n\n\n\n<li><em style=\"font-size: 16px;\" data-start=\"3420\" data-end=\"3423\">R<\/em> = \u0110\u1ecdc gi\u00e1 tr\u1ecb thang \u0111o (0\u2013100)<\/li>\n\n\n\n<li><em style=\"font-size: 16px;\" data-start=\"3452\" data-end=\"3455\">C<\/em> = C\u00f4ng su\u1ea5t c\u1ee7a b\u1ed9 th\u1eed nghi\u1ec7m (v\u00ed d\u1ee5: 0,17, 0,34, 0,67 J, v.v.)<\/li>\n<\/ul>\n<\/blockquote>\n\n\n\n<h2 class=\"wp-block-heading\">L\u1ef1a ch\u1ecdn m\u00e1y th\u1eed va \u0111\u1eadp b\u1eb1ng qu\u1ea3 l\u1eafc t\u1ed1t nh\u1ea5t<\/h2>\n\n\n\n<p>Ki\u1ec3m tra ch\u00ednh x\u00e1c <strong data-start=\"4573\" data-end=\"4619\">Kh\u1ea3 n\u0103ng ch\u1ecbu va \u0111\u1eadp c\u1ee7a m\u00e0ng nh\u1ef1a<\/strong> S\u1eed d\u1ee5ng ti\u00eau chu\u1ea9n ASTM D3420 l\u00e0 y\u1ebfu t\u1ed1 quan tr\u1ecdng \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o hi\u1ec7u su\u1ea5t v\u1eadt li\u1ec7u trong c\u00e1c m\u00f4i tr\u01b0\u1eddng kh\u1eafc nghi\u1ec7t. B\u1eb1ng c\u00e1ch tu\u00e2n th\u1ee7 c\u00e1c quy tr\u00ecnh \u0111\u01b0\u1ee3c n\u00eau ra v\u00e0 s\u1eed d\u1ee5ng thi\u1ebft b\u1ecb \u0111\u00e1ng tin c\u1eady nh\u01b0... <strong data-start=\"4788\" data-end=\"4815\"><a href=\"https:\/\/www.packqc.com\/vi\/\">D\u1ee5ng c\u1ee5 t\u1ebf b\u00e0o<\/a> PIT-01<\/strong>C\u00e1c ph\u00f2ng th\u00ed nghi\u1ec7m v\u00e0 nh\u00e0 s\u1ea3n xu\u1ea5t c\u00f3 th\u1ec3 \u0111\u1ea1t \u0111\u01b0\u1ee3c <strong data-start=\"4852\" data-end=\"4908\">K\u1ebft qu\u1ea3 c\u00f3 th\u1ec3 l\u1eb7p l\u1ea1i, ch\u00ednh x\u00e1c v\u00e0 tu\u00e2n th\u1ee7 ti\u00eau chu\u1ea9n.<\/strong>\u0110i\u1ec1u n\u00e0y gi\u00fap \u0111\u1ea3m b\u1ea3o an to\u00e0n s\u1ea3n ph\u1ea9m, n\u00e2ng cao \u0111\u1ed9 tin c\u1eady c\u1ee7a bao b\u00ec v\u00e0 duy tr\u00ec tu\u00e2n th\u1ee7 c\u00e1c ti\u00eau chu\u1ea9n qu\u1ed1c t\u1ebf.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\n\t\t\t\tLi\u00ean h\u1ec7 v\u1edbi ch\u00fang t\u00f4i \u0111\u1ec3 nh\u1eadn gi\u1ea3i ph\u00e1p th\u1eed nghi\u1ec7m theo ti\u00eau chu\u1ea9n ASTM D3420.\t\t\t\t<\/h2>\n\n\n\n<p>Hi\u1ec3u v\u00e0 \u00e1p d\u1ee5ng ti\u00eau chu\u1ea9n ASTM D3420 (Th\u1eed nghi\u1ec7m b\u1eb1ng qu\u1ea3 l\u1eafc I)<strong data-start=\"4289\" data-end=\"4316\">Ph\u01b0\u01a1ng ph\u00e1p th\u1eed nghi\u1ec7m t\u00e1c \u0111\u1ed9ng<\/strong> \u0110\u1ea3m b\u1ea3o \u0111\u1ed9 tin c\u1eady v\u00e0 an to\u00e0n c\u1ee7a m\u00e0ng nh\u1ef1a trong c\u00e1c \u1ee9ng d\u1ee5ng th\u1ef1c t\u1ebf. V\u1edbi c\u00e1c quy tr\u00ecnh v\u00e0 k\u1ef9 thu\u1eadt th\u1eed nghi\u1ec7m m\u1ea1nh m\u1ebd, c\u00e1c chuy\u00ean gia c\u00f3 th\u1ec3 \u0111\u00e1nh gi\u00e1 m\u1ed9t c\u00e1ch t\u1ef1 tin kh\u1ea3 n\u0103ng ch\u1ecbu va \u0111\u1eadp c\u1ee7a m\u00e0ng nh\u1ef1a, g\u00f3p ph\u1ea7n th\u00fac \u0111\u1ea9y c\u1ea3i ti\u1ebfn s\u1ea3n ph\u1ea9m v\u00e0 duy tr\u00ec c\u00e1c ti\u00eau chu\u1ea9n ch\u1ea5t l\u01b0\u1ee3ng cao.<\/p>\n\n\n\n<p>\u0110\u1ec3 bi\u1ebft th\u00eam th\u00f4ng tin v\u1ec1 <strong data-start=\"4646\" data-end=\"4673\">Cell Instruments PIT-01<\/strong> Ho\u1eb7c \u0111\u1ec3 th\u1ea3o lu\u1eadn v\u1ec1 nhu c\u1ea7u ki\u1ec3m th\u1eed t\u00f9y ch\u1ec9nh, h\u00e3y li\u00ean h\u1ec7 v\u1edbi \u0111\u1ed9i ng\u0169 k\u1ef9 thu\u1eadt c\u1ee7a ch\u00fang t\u00f4i ngay h\u00f4m nay!<\/p>","protected":false},"excerpt":{"rendered":"<p>Understanding ASTM D3420 and Its Importance ASTM D3420 is a widely recognized standard used to determine the pendulum impact resistance of plastic film materials. It simulates real-world impact conditions to assess a film&#8217;s toughness, particularly for applications in packaging, medical, and consumer goods. This guide explains how to conduct the test using a film pendulum [&hellip;]<\/p>","protected":false},"featured_media":10016,"parent":0,"template":"","meta":{"_acf_changed":true,"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""}}},"standard-category":[611],"class_list":["post-9837","standard","type-standard","status-publish","has-post-thumbnail","hentry","standard-category-astm"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.packqc.com\/vi\/wp-json\/wp\/v2\/standard\/9837","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.packqc.com\/vi\/wp-json\/wp\/v2\/standard"}],"about":[{"href":"https:\/\/www.packqc.com\/vi\/wp-json\/wp\/v2\/types\/standard"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.packqc.com\/vi\/wp-json\/wp\/v2\/media\/10016"}],"wp:attachment":[{"href":"https:\/\/www.packqc.com\/vi\/wp-json\/wp\/v2\/media?parent=9837"}],"wp:term":[{"taxonomy":"standard-category","embeddable":true,"href":"https:\/\/www.packqc.com\/vi\/wp-json\/wp\/v2\/standard-category?post=9837"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}