{"id":1258,"date":"2026-04-22T08:59:36","date_gmt":"2026-04-22T08:59:36","guid":{"rendered":"https:\/\/www.packtests.com\/?post_type=standard&#038;p=1258"},"modified":"2026-06-04T05:41:35","modified_gmt":"2026-06-04T05:41:35","slug":"astm-d2732","status":"publish","type":"standard","link":"https:\/\/www.packtests.com\/vi\/standard\/astm-d2732\/","title":{"rendered":"ASTM D2732"},"content":{"rendered":"<h2 class=\"wp-block-heading\">Hi\u1ec3u v\u1ec1 ti\u00eau chu\u1ea9n ASTM D2732 trong th\u1eed nghi\u1ec7m m\u00e0ng nh\u1ef1a<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>ASTM D2732<\/strong> quy \u0111\u1ecbnh m\u1ed9t ph\u01b0\u01a1ng ph\u00e1p ti\u00eau chu\u1ea9n \u0111\u1ec3 \u0111\u00e1nh gi\u00e1 <em>s\u1ef1 co ng\u00f3t nhi\u1ec7t tuy\u1ebfn t\u00ednh kh\u00f4ng b\u1ecb h\u1ea1n ch\u1ebf<\/em> c\u1ee7a m\u00e0ng v\u00e0 t\u1ea5m nh\u1ef1a. Ph\u01b0\u01a1ng ph\u00e1p n\u00e0y t\u1eadp trung v\u00e0o c\u00e1c v\u1eadt li\u1ec7u c\u00f3 \u0111\u1ed9 d\u00e0y <strong>0,76 mm ho\u1eb7c nh\u1ecf h\u01a1n<\/strong>, khi\u1ebfn s\u1ea3n ph\u1ea9m n\u00e0y tr\u1edf n\u00ean v\u00f4 c\u00f9ng ph\u00f9 h\u1ee3p cho c\u00e1c \u1ee9ng d\u1ee5ng trong l\u0129nh v\u1ef1c bao b\u00ec linh ho\u1ea1t, m\u00e0ng y t\u1ebf v\u00e0 m\u00e0ng co c\u00f4ng nghi\u1ec7p.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Trong qu\u00e1 tr\u00ecnh s\u1ea3n xu\u1ea5t m\u00e0ng, c\u00e1c c\u00f4ng \u0111o\u1ea1n nh\u01b0 \u0111\u00f9n ho\u1eb7c k\u00e9o gi\u00e3n s\u1ebd g\u00e2y ra <strong>c\u0103ng th\u1eb3ng b\u00ean trong<\/strong>. Khi \u0111\u01b0\u1ee3c gia nhi\u1ec7t, c\u00e1c \u1ee9ng su\u1ea5t n\u00e0y \u0111\u01b0\u1ee3c gi\u1ea3i ph\u00f3ng, khi\u1ebfn v\u1eadt li\u1ec7u co l\u1ea1i. Ti\u00eau chu\u1ea9n ASTM D2732 \u0111\u1ecbnh l\u01b0\u1ee3ng hi\u1ec7n t\u01b0\u1ee3ng n\u00e0y, gi\u00fap c\u00e1c k\u1ef9 s\u01b0 v\u00e0 chuy\u00ean gia ki\u1ec3m so\u00e1t ch\u1ea5t l\u01b0\u1ee3ng d\u1ef1 \u0111o\u00e1n hi\u1ec7u su\u1ea5t c\u1ee7a v\u1eadt li\u1ec7u trong c\u00e1c \u0111i\u1ec1u ki\u1ec7n nhi\u1ec7t.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Ti\u00eau chu\u1ea9n n\u00e0y kh\u00f4ng \u0111\u1ec1 c\u1eadp \u0111\u1ebfn hi\u1ec7n t\u01b0\u1ee3ng co ng\u00f3t do m\u1ea5t dung m\u00f4i, nh\u1eb1m \u0111\u1ea3m b\u1ea3o r\u1eb1ng c\u00e1c k\u1ebft qu\u1ea3 ph\u1ea3n \u00e1nh ch\u00ednh x\u00e1c c\u00e1c t\u00e1c \u0111\u1ed9ng nhi\u1ec7t.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Ph\u01b0\u01a1ng ph\u00e1p th\u1eed co ng\u00f3t: Nguy\u00ean l\u00fd v\u00e0 \u00fd ngh\u0129a trong c\u00f4ng nghi\u1ec7p<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1i <strong>ph\u01b0\u01a1ng ph\u00e1p th\u1eed \u0111\u1ed9 co ng\u00f3t<\/strong> Theo ti\u00eau chu\u1ea9n ASTM D2732, ph\u01b0\u01a1ng ph\u00e1p n\u00e0y \u0111\u00e1nh gi\u00e1 m\u1ee9c \u0111\u1ed9 co ng\u00f3t c\u1ee7a m\u00e0ng khi \u0111\u01b0\u1ee3c \u0111\u1eb7t trong \u0111i\u1ec1u ki\u1ec7n nhi\u1ec7t \u0111\u1ed9 \u0111\u01b0\u1ee3c ki\u1ec3m so\u00e1t. \u0110i\u1ec1u n\u00e0y cung c\u1ea5p nh\u1eefng th\u00f4ng tin quan tr\u1ecdng v\u1ec1:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>T\u00ednh \u1ed5n \u0111\u1ecbnh c\u1ee7a v\u1eadt li\u1ec7u khi ti\u1ebfp x\u00fac v\u1edbi nhi\u1ec7t<\/strong><\/li>\n\n\n\n<li><strong>T\u00ednh to\u00e0n v\u1eb9n c\u1ee7a bao b\u00ec trong qu\u00e1 tr\u00ecnh x\u1eed l\u00fd nhi\u1ec7t<\/strong><\/li>\n\n\n\n<li><strong>T\u00ednh nh\u1ea5t qu\u00e1n gi\u1eefa c\u00e1c l\u00f4 s\u1ea3n xu\u1ea5t<\/strong><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Nhi\u1ec7t \u0111\u1ed9 \u0111\u00f3ng vai tr\u00f2 quy\u1ebft \u0111\u1ecbnh. Hi\u1ec7n t\u01b0\u1ee3ng co ng\u00f3t th\u01b0\u1eddng c\u00f3 m\u1ed1i li\u00ean h\u1ec7 v\u1edbi:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>H\u01b0\u1edbng gia c\u00f4ng (theo chi\u1ec1u d\u1ecdc m\u00e1y so v\u1edbi chi\u1ec1u ngang)<\/li>\n\n\n\n<li>C\u1ea5u tr\u00fac v\u00e0 \u0111\u1ed9 k\u1ebft tinh c\u1ee7a polyme<\/li>\n\n\n\n<li>C\u00e1c \u0111i\u1ec3m chuy\u1ec3n pha trong nh\u1ef1a n\u1ec1n<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">B\u1eb1ng c\u00e1ch th\u1eed nghi\u1ec7m \u1edf nhi\u1ec1u m\u1ee9c nhi\u1ec7t \u0111\u1ed9 kh\u00e1c nhau, ng\u01b0\u1eddi d\u00f9ng c\u00f3 th\u1ec3 x\u00e1c \u0111\u1ecbnh \u0111\u01b0\u1ee3c m\u1ed9t <strong>\u0111\u01b0\u1eddng cong bi\u1ec3u di\u1ec5n \u0111\u1ed9 co ng\u00f3t<\/strong>, \u0111i\u1ec1u n\u00e0y l\u00e0 y\u1ebfu t\u1ed1 thi\u1ebft y\u1ebfu cho vi\u1ec7c thi\u1ebft k\u1ebf s\u1ea3n ph\u1ea9m v\u00e0 t\u1ed1i \u01b0u h\u00f3a quy tr\u00ecnh.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Quy tr\u00ecnh ki\u1ec3m tra \u0111\u1ed9 co r\u00fat kh\u00f4ng d\u00f9ng m\u00e0ng b\u1ecdc: C\u00e1ch th\u1ef1c hi\u1ec7n t\u1eebng b\u01b0\u1edbc<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1i <strong>Quy tr\u00ecnh th\u1eed nghi\u1ec7m co ng\u00f3t kh\u00f4ng d\u00f9ng m\u00e0ng b\u1ecdc<\/strong> \u0111\u1ea3m b\u1ea3o r\u1eb1ng qu\u00e1 tr\u00ecnh co ng\u00f3t di\u1ec5n ra m\u00e0 kh\u00f4ng c\u00f3 c\u00e1c t\u00e1c \u0111\u1ed9ng b\u00ean ngo\u00e0i, t\u1eeb \u0111\u00f3 cho ph\u00e9p \u0111o l\u01b0\u1eddng ch\u00ednh x\u00e1c t\u00ednh ch\u1ea5t n\u1ed9i t\u1ea1i c\u1ee7a v\u1eadt li\u1ec7u.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u00e1c b\u01b0\u1edbc ch\u00ednh bao g\u1ed3m:<\/strong><\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>Chu\u1ea9n b\u1ecb m\u1eabu<\/strong><br>C\u1eaft m\u1eabu th\u00e0nh <strong>100 mm \u00d7 100 mm<\/strong>. S\u1eed d\u1ee5ng \u00edt nh\u1ea5t hai m\u1eabu cho m\u1ed7i \u0111i\u1ec3m nhi\u1ec7t \u0111\u1ed9.<\/li>\n\n\n\n<li><strong>Ghi d\u1ea5u v\u00e0 \u0111\u1ecbnh h\u01b0\u1edbng<\/strong><br>X\u00e1c \u0111\u1ecbnh h\u01b0\u1edbng d\u1ecdc m\u00e1y (MD) v\u00e0 h\u01b0\u1edbng ngang (TD) \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh \u0111\u1ed9 co r\u00fat theo h\u01b0\u1edbng.<\/li>\n\n\n\n<li><strong>\u0110\u1eb7t v\u00e0o khay co nhi\u1ec7t mi\u1ec5n ph\u00ed<\/strong><br>\u0110\u1ea3m b\u1ea3o m\u1eabu th\u1eed ho\u00e0n to\u00e0n kh\u00f4ng b\u1ecb c\u1ed1 \u0111\u1ecbnh \u0111\u1ed3ng th\u1eddi ng\u0103n kh\u00f4ng cho m\u1eabu n\u1ed5i l\u00ean trong m\u00f4i tr\u01b0\u1eddng gia nhi\u1ec7t.<\/li>\n\n\n\n<li><strong>Ghi ch\u00e9p nhi\u1ec7t \u0111\u1ed9<\/strong><br>H\u00e3y \u0111o v\u00e0 ghi l\u1ea1i nhi\u1ec7t \u0111\u1ed9 n\u01b0\u1edbc t\u1eafm tr\u01b0\u1edbc khi ng\u00e2m m\u00ecnh.<\/li>\n\n\n\n<li><strong>Quy tr\u00ecnh ng\u00e2m t\u1ea9m<\/strong><br>Ng\u00e2m m\u1eabu trong <strong>~10 gi\u00e2y<\/strong> ho\u1eb7c cho \u0111\u1ebfn khi \u0111\u1ea1t \u0111\u01b0\u1ee3c tr\u1ea1ng th\u00e1i c\u00e2n b\u1eb1ng nhi\u1ec7t.<br><em>Tr\u00e1nh ti\u1ebfp x\u00fac v\u1edbi nhi\u1ec7t \u0111\u1ed9 cao tr\u01b0\u1edbc khi nung<\/em>, v\u00ec \u0111i\u1ec1u n\u00e0y c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn sai s\u00f3t.<\/li>\n\n\n\n<li><strong>Giai \u0111o\u1ea1n l\u00e0m m\u00e1t<\/strong><br>Chuy\u1ec3n ngay v\u00e0o m\u00f4i tr\u01b0\u1eddng \u1edf nhi\u1ec7t \u0111\u1ed9 ph\u00f2ng \u0111\u1ec3 \u1ed5n \u0111\u1ecbnh.<\/li>\n\n\n\n<li><strong>\u0110o l\u01b0\u1eddng<\/strong><br>Sau khi l\u00e0m ngu\u1ed9i, ti\u1ebfn h\u00e0nh \u0111o c\u00e1c k\u00edch th\u01b0\u1edbc cu\u1ed1i c\u00f9ng theo c\u1ea3 hai h\u01b0\u1edbng MD v\u00e0 TD.<\/li>\n<\/ol>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>L\u01b0u \u00fd quan tr\u1ecdng:<\/strong> Tr\u00e1nh l\u00e0m c\u0103ng ho\u1eb7c bi\u1ebfn d\u1ea1ng m\u1eabu th\u1eed trong qu\u00e1 tr\u00ecnh x\u1eed l\u00fd.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">T\u00ednh to\u00e1n \u0111\u1ed9 co ng\u00f3t v\u00e0 ph\u00e2n t\u00edch d\u1eef li\u1ec7u<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">T\u1ef7 l\u1ec7 co ng\u00f3t \u0111\u01b0\u1ee3c t\u00ednh nh\u01b0 sau:<math xmlns=\"http:\/\/www.w3.org\/1998\/Math\/MathML\" display=\"block\"><semantics><mrow><mtext>\u0110\u1ed9 co ng\u00f3t (%)<\/mtext><mo>=<\/mo><mfrac><mrow><msub><mi>L<\/mi><mn>0<\/mn><\/msub><mo>\u2212<\/mo><msub><mi>L<\/mi><mi>f<\/mi><\/msub><\/mrow><msub><mi>L<\/mi><mn>0<\/mn><\/msub><\/mfrac><mo>\u00d7<\/mo><mn>100<\/mn><\/mrow><annotation encoding=\"application\/x-tex\">\\text{\u0110\u1ed9 co ng\u00f3t (\\%)} = \\frac{L_0 \u2013 L_f}{L_0} \\times 100<\/annotation><\/semantics><\/math>T\u1ef7 l\u1ec7 co ng\u00f3t (%) = (L0 \u2013 Lf) \u00d7 100<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><math xmlns=\"http:\/\/www.w3.org\/1998\/Math\/MathML\"><semantics><mrow><mtext>\u0110\u1ed9 co ng\u00f3t (%)<\/mtext><mo>=<\/mo><mfrac><mrow><msub><mi>L<\/mi><mn>0<\/mn><\/msub><mo>\u2212<\/mo><msub><mi>L<\/mi><mi>f<\/mi><\/msub><\/mrow><msub><mi>L<\/mi><mn>0<\/mn><\/msub><\/mfrac><mo>\u00d7<\/mo><mn>100<\/mn><\/mrow><annotation encoding=\"application\/x-tex\">\\text{\u0110\u1ed9 co ng\u00f3t (\\%)} = \\frac{L_0 \u2013 L_f}{L_0} \\times 100<\/annotation><\/semantics><\/math>T\u1ef7 l\u1ec7 co ng\u00f3t (%) = (L0 \u2013 Lf) \u00d7 100<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u1ecba \u0111i\u1ec3m:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><em>L\u2080<\/em> = Chi\u1ec1u d\u00e0i ban \u0111\u1ea7u (th\u01b0\u1eddng l\u00e0 100 mm)<\/li>\n\n\n\n<li><em>L_f<\/em> = Chi\u1ec1u d\u00e0i cu\u1ed1i c\u00f9ng sau khi co r\u00fat<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>M\u1ed9t s\u1ed1 m\u1eb9o khi phi\u00ean d\u1ecbch:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Gi\u00e1 tr\u1ecb c\u00e0ng cao th\u00ec m\u1ee9c \u0111\u1ed9 gi\u1ea3i ph\u00f3ng \u1ee9ng su\u1ea5t b\u00ean trong c\u00e0ng l\u1edbn<\/li>\n\n\n\n<li>S\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa MD v\u00e0 TD cho th\u1ea5y c\u00e1c hi\u1ec7u \u1ee9ng \u0111\u1ecbnh h\u01b0\u1edbng<\/li>\n\n\n\n<li>Th\u1eed nghi\u1ec7m \u0111a nhi\u1ec7t \u0111\u1ed9 gi\u00fap x\u00e1c \u0111\u1ecbnh c\u00e1c kho\u1ea3ng nhi\u1ec7t \u0111\u1ed9 cho qu\u00e1 tr\u00ecnh ch\u1ebf bi\u1ebfn<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">M\u00e1y th\u1eed co ng\u00f3t nhi\u1ec7t: L\u1ef1a ch\u1ecdn v\u00e0 t\u1ed1i \u01b0u h\u00f3a thi\u1ebft b\u1ecb<\/h2>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-7387b849 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-vertically-aligned-center is-layout-constrained wp-block-column-is-layout-constrained\">\n<figure class=\"wp-block-image size-full\"><img fetchpriority=\"high\" decoding=\"async\" width=\"600\" height=\"600\" src=\"https:\/\/www.packtests.com\/wp-content\/uploads\/2026\/04\/ASTM-D2732-Shrinkage-Test-Method-Film-Free-Shrink-Test.webp\" alt=\"Ph\u01b0\u01a1ng ph\u00e1p th\u1eed co ng\u00f3t theo ti\u00eau chu\u1ea9n ASTM D2732 v\u00e0 th\u1eed nghi\u1ec7m co ng\u00f3t kh\u00f4ng d\u00f9ng m\u00e0ng\" class=\"wp-image-1259\" title=\"\" srcset=\"https:\/\/www.packtests.com\/wp-content\/uploads\/2026\/04\/ASTM-D2732-Shrinkage-Test-Method-Film-Free-Shrink-Test.webp 600w, https:\/\/www.packtests.com\/wp-content\/uploads\/2026\/04\/ASTM-D2732-Shrinkage-Test-Method-Film-Free-Shrink-Test-300x300.webp 300w, https:\/\/www.packtests.com\/wp-content\/uploads\/2026\/04\/ASTM-D2732-Shrinkage-Test-Method-Film-Free-Shrink-Test-150x150.webp 150w, https:\/\/www.packtests.com\/wp-content\/uploads\/2026\/04\/ASTM-D2732-Shrinkage-Test-Method-Film-Free-Shrink-Test-12x12.webp 12w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/figure>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-vertically-aligned-center is-layout-flow wp-block-column-is-layout-flow\">\n<p class=\"wp-block-paragraph\">A <strong>m\u00e1y th\u1eed co ng\u00f3t nhi\u1ec7t<\/strong> l\u00e0 y\u1ebfu t\u1ed1 thi\u1ebft y\u1ebfu \u0111\u1ec3 th\u1ef1c hi\u1ec7n ti\u00eau chu\u1ea9n ASTM D2732 v\u1edbi \u0111\u1ed9 l\u1eb7p l\u1ea1i v\u00e0 \u0111\u1ed9 ch\u00ednh x\u00e1c cao. C\u00e1c h\u1ec7 th\u1ed1ng ti\u00ean ti\u1ebfn \u0111\u1ea3m b\u1ea3o:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Ki\u1ec3m so\u00e1t nhi\u1ec7t \u0111\u1ed9 \u1ed5n \u0111\u1ecbnh<\/li>\n\n\n\n<li>Ph\u00e2n b\u1ed1 nhi\u1ec7t \u0111\u1ed3ng \u0111\u1ec1u<\/li>\n\n\n\n<li>Th\u1eddi gian ch\u00ednh x\u00e1c v\u00e0 \u0111i\u1ec1u ki\u1ec7n ng\u00e2m<\/li>\n<\/ul>\n<\/div>\n<\/div>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1i <strong>M\u00e1y ki\u1ec3m tra \u0111\u1ed9 co ng\u00f3t kh\u00f4ng d\u00f9ng m\u00e0ng FST-01<\/strong> S\u1ea3n ph\u1ea9m t\u1eeb Cell Instruments \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf chuy\u00ean bi\u1ec7t cho ti\u00eau chu\u1ea9n n\u00e0y. S\u1ea3n ph\u1ea9m n\u00e0y mang l\u1ea1i:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u0110\u1ed9 ch\u00ednh x\u00e1c nhi\u1ec7t \u0111\u1ed9 \u00b10,3\u00b0C<\/strong>, \u0111\u1ea3m b\u1ea3o k\u1ebft qu\u1ea3 \u0111\u00e1ng tin c\u1eady<\/li>\n\n\n\n<li><strong>L\u00e0m n\u00f3ng ch\u1ea5t l\u1ecfng \u0111\u1ed3ng \u0111\u1ec1u<\/strong>, lo\u1ea1i b\u1ecf hi\u1ec7n t\u01b0\u1ee3ng qu\u00e1 nhi\u1ec7t c\u1ee5c b\u1ed9<\/li>\n\n\n\n<li><strong>D\u1ee5ng c\u1ee5 c\u1ed1 \u0111\u1ecbnh co ng\u00f3t t\u1ef1 do<\/strong>, duy tr\u00ec c\u00e1c \u0111i\u1ec1u ki\u1ec7n t\u1ef1 do<\/li>\n\n\n\n<li><strong>\u0110i\u1ec1u khi\u1ec3n th\u1eddi gian t\u1ef1 \u0111\u1ed9ng<\/strong>, n\u00e2ng cao \u0111\u1ed9 l\u1eb7p l\u1ea1i<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Thi\u1ebft b\u1ecb n\u00e0y cho ph\u00e9p c\u00e1c ph\u00f2ng th\u00ed nghi\u1ec7m m\u00f4 ph\u1ecfng c\u00e1c \u0111i\u1ec1u ki\u1ec7n co ng\u00f3t trong th\u1ef1c t\u1ebf v\u00e0 ki\u1ec3m ch\u1ee9ng hi\u1ec7u su\u1ea5t c\u1ee7a m\u00e0ng tr\u01b0\u1edbc khi \u0111\u01b0a v\u00e0o s\u1ea3n xu\u1ea5t.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">C\u00e1c \u1ee9ng d\u1ee5ng th\u1ef1c ti\u1ec5n c\u1ee7a ph\u01b0\u01a1ng ph\u00e1p th\u1eed nghi\u1ec7m theo ti\u00eau chu\u1ea9n ASTM D2732<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Ti\u00eau chu\u1ea9n ASTM D2732 \u0111\u00f3ng vai tr\u00f2 quan tr\u1ecdng trong c\u00e1c ng\u00e0nh c\u00f4ng nghi\u1ec7p m\u00e0 t\u00ednh ch\u1ea5t co ng\u00f3t nhi\u1ec7t \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn hi\u1ec7u su\u1ea5t:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Bao b\u00ec m\u1ec1m:<\/strong> \u0110\u1ea3m b\u1ea3o m\u00e0ng co l\u1ea1i \u0111\u1ed3ng \u0111\u1ec1u m\u00e0 kh\u00f4ng b\u1ecb bi\u1ebfn d\u1ea1ng<\/li>\n\n\n\n<li><strong>Bao b\u00ec y t\u1ebf v\u00e0 d\u01b0\u1ee3c ph\u1ea9m:<\/strong> Duy tr\u00ec t\u00ednh to\u00e0n v\u1eb9n c\u1ee7a h\u00e0ng r\u00e0o v\u00f4 tr\u00f9ng<\/li>\n\n\n\n<li><strong>\u1ed0ng co nhi\u1ec7t v\u00e0 \u1ed1ng co nhi\u1ec7t:<\/strong> \u0110\u1ea3m b\u1ea3o v\u1eeba v\u1eb7n v\u00e0 c\u00e1ch nhi\u1ec7t t\u1ed1t<\/li>\n\n\n\n<li><strong>Phim c\u00f4ng nghi\u1ec7p:<\/strong> Gi\u00fap \u0111\u1ea3m b\u1ea3o \u0111\u1ed9 \u1ed5n \u0111\u1ecbnh c\u1ee7a t\u1ea3i tr\u1ecdng trong qu\u00e1 tr\u00ecnh qu\u1ea5n m\u00e0ng b\u1ecdc pallet<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Vi\u1ec7c th\u1eed nghi\u1ec7m gi\u00fap c\u00e1c nh\u00e0 s\u1ea3n xu\u1ea5t \u0111i\u1ec1u ch\u1ec9nh c\u00e1c t\u00ednh ch\u1ea5t c\u1ee7a v\u1eadt li\u1ec7u cho ph\u00f9 h\u1ee3p v\u1edbi y\u00eau c\u1ea7u s\u1eed d\u1ee5ng cu\u1ed1i c\u00f9ng, t\u1eeb \u0111\u00f3 gi\u1ea3m thi\u1ec3u c\u00e1c khuy\u1ebft t\u1eadt v\u00e0 n\u00e2ng cao \u0111\u1ed9 tin c\u1eady c\u1ee7a s\u1ea3n ph\u1ea9m.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">N\u00e2ng cao c\u00f4ng t\u00e1c ki\u1ec3m so\u00e1t ch\u1ea5t l\u01b0\u1ee3ng theo ti\u00eau chu\u1ea9n ASTM D2732<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Vi\u1ec7c \u00e1p d\u1ee5ng nh\u1ea5t qu\u00e1n ti\u00eau chu\u1ea9n ASTM D2732 gi\u00fap c\u1ea3i thi\u1ec7n:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>X\u00e1c nh\u1eadn quy tr\u00ecnh<\/strong> trong qu\u00e1 tr\u00ecnh s\u1ea3n xu\u1ea5t phim<\/li>\n\n\n\n<li><strong>\u0110\u1ea3m b\u1ea3o ch\u1ea5t l\u01b0\u1ee3ng nh\u00e0 cung c\u1ea5p<\/strong><\/li>\n\n\n\n<li><strong>Ph\u00e2n t\u00edch nguy\u00ean nh\u00e2n h\u1ecfng h\u00f3c<\/strong> trong c\u00e1c l\u1ed7i v\u1ec1 bao b\u00ec<\/li>\n\n\n\n<li><strong>Tu\u00e2n th\u1ee7 quy \u0111\u1ecbnh<\/strong> trong c\u00e1c ng\u00e0nh nh\u1ea1y c\u1ea3m<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">B\u1eb1ng c\u00e1ch t\u00edch h\u1ee3p b\u00e0i ki\u1ec3m tra n\u00e0y v\u00e0o quy tr\u00ecnh ki\u1ec3m so\u00e1t ch\u1ea5t l\u01b0\u1ee3ng (QC) th\u01b0\u1eddng xuy\u00ean, c\u00e1c doanh nghi\u1ec7p s\u1ebd \u0111\u1ea1t \u0111\u01b0\u1ee3c <strong>ki\u1ec3m so\u00e1t hi\u1ec7u su\u1ea5t co ng\u00f3t d\u1ef1a tr\u00ean d\u1eef li\u1ec7u<\/strong>, t\u1eeb \u0111\u00f3 t\u00e1c \u0111\u1ed9ng tr\u1ef1c ti\u1ebfp \u0111\u1ebfn ch\u1ea5t l\u01b0\u1ee3ng s\u1ea3n ph\u1ea9m v\u00e0 s\u1ef1 h\u00e0i l\u00f2ng c\u1ee7a kh\u00e1ch h\u00e0ng.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">C\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>1. Nh\u1eefng lo\u1ea1i v\u1eadt li\u1ec7u n\u00e0o c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c th\u1eed nghi\u1ec7m theo ti\u00eau chu\u1ea9n ASTM D2732?<\/strong><br>Ti\u00eau chu\u1ea9n n\u00e0y \u00e1p d\u1ee5ng cho c\u00e1c lo\u1ea1i m\u00e0ng v\u00e0 t\u1ea5m nh\u1ef1a c\u00f3 \u0111\u1ed9 d\u00e0y t\u1ed1i \u0111a 0,76 mm, bao g\u1ed3m PE, PET, PVC v\u00e0 c\u00e1c s\u1ea3n ph\u1ea9m nhi\u1ec1u l\u1edbp.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>2. T\u1ea1i sao hi\u1ec7n t\u01b0\u1ee3ng co ng\u00f3t kh\u00f4ng \u0111\u01b0\u1ee3c ki\u1ec3m so\u00e1t l\u1ea1i quan tr\u1ecdng?<\/strong><br>\u0110i\u1ec1u n\u00e0y ph\u1ea3n \u00e1nh ph\u1ea3n \u1ee9ng t\u1ef1 nhi\u00ean c\u1ee7a v\u1eadt li\u1ec7u \u0111\u1ed1i v\u1edbi nhi\u1ec7t m\u00e0 kh\u00f4ng c\u00f3 t\u00e1c \u0111\u1ed9ng c\u1ee7a c\u00e1c l\u1ef1c b\u00ean ngo\u00e0i, t\u1eeb \u0111\u00f3 cung c\u1ea5p d\u1eef li\u1ec7u hi\u1ec7u su\u1ea5t ch\u00ednh x\u00e1c.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>3. M\u1eabu n\u00ean \u0111\u01b0\u1ee3c ng\u00e2m trong bao l\u00e2u?<\/strong><br>Th\u00f4ng th\u01b0\u1eddng l\u00e0 10 gi\u00e2y, nh\u01b0ng \u0111\u1ed1i v\u1edbi c\u00e1c v\u1eadt li\u1ec7u d\u00e0y h\u01a1n ho\u1eb7c m\u1edbi, c\u00f3 th\u1ec3 c\u1ea7n ph\u1ea3i ki\u1ec3m tra \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o qu\u00e1 tr\u00ecnh co r\u00fat di\u1ec5n ra ho\u00e0n to\u00e0n.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>4. S\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa \u0111\u1ed9 co ng\u00f3t MD v\u00e0 TD l\u00e0 g\u00ec?<\/strong><br>MD l\u00e0 vi\u1ebft t\u1eaft c\u1ee7a \u201cmachine direction\u201d (h\u01b0\u1edbng m\u00e1y), c\u00f2n TD l\u00e0 vi\u1ebft t\u1eaft c\u1ee7a \u201ctransverse\u201d (h\u01b0\u1edbng ngang). Nh\u1eefng kh\u00e1c bi\u1ec7t n\u00e0y cho th\u1ea5y \u1ea3nh h\u01b0\u1edfng c\u1ee7a h\u01b0\u1edbng gia c\u00f4ng.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>5. C\u00f3 th\u1ec3 <a href=\"https:\/\/store.astm.org\/d2732-14r25.html\" target=\"_blank\" rel=\"noreferrer noopener nofollow\">ASTM D2732<\/a> d\u1ef1 \u0111o\u00e1n hi\u1ec7u su\u1ea5t \u0111\u00f3ng g\u00f3i th\u1ef1c t\u1ebf?<\/strong><br>\u0110\u00fang v\u1eady, khi k\u1ebft h\u1ee3p v\u1edbi th\u1eed nghi\u1ec7m \u0111a nhi\u1ec7t \u0111\u1ed9, ph\u01b0\u01a1ng ph\u00e1p n\u00e0y m\u00f4 ph\u1ecfng r\u1ea5t s\u00e1t c\u00e1c \u0111i\u1ec1u ki\u1ec7n nhi\u1ec7t \u0111\u1ed9 trong th\u1ef1c t\u1ebf.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>","protected":false},"excerpt":{"rendered":"<p>Understanding ASTM D2732 in Plastic Film Testing ASTM D2732 defines a standardized approach to evaluate the unrestrained linear thermal shrinkage of plastic films and sheeting. This method focuses on materials with a thickness of 0.76 mm or less, making it highly relevant for flexible packaging, medical films, and industrial shrink applications. During film manufacturing, processes [&hellip;]<\/p>","protected":false},"featured_media":1259,"parent":0,"template":"","meta":{"_acf_changed":false},"standard-category":[64],"class_list":["post-1258","standard","type-standard","status-publish","has-post-thumbnail","hentry","standard-category-astm"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.packtests.com\/vi\/wp-json\/wp\/v2\/standard\/1258","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.packtests.com\/vi\/wp-json\/wp\/v2\/standard"}],"about":[{"href":"https:\/\/www.packtests.com\/vi\/wp-json\/wp\/v2\/types\/standard"}],"version-history":[{"count":1,"href":"https:\/\/www.packtests.com\/vi\/wp-json\/wp\/v2\/standard\/1258\/revisions"}],"predecessor-version":[{"id":1326,"href":"https:\/\/www.packtests.com\/vi\/wp-json\/wp\/v2\/standard\/1258\/revisions\/1326"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.packtests.com\/vi\/wp-json\/wp\/v2\/media\/1259"}],"wp:attachment":[{"href":"https:\/\/www.packtests.com\/vi\/wp-json\/wp\/v2\/media?parent=1258"}],"wp:term":[{"taxonomy":"standard-category","embeddable":true,"href":"https:\/\/www.packtests.com\/vi\/wp-json\/wp\/v2\/standard-category?post=1258"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}