{"id":589,"date":"2026-02-26T05:44:05","date_gmt":"2026-02-26T05:44:05","guid":{"rendered":"https:\/\/www.teartester.com\/?post_type=method&p=589"},"modified":"2026-02-27T08:59:17","modified_gmt":"2026-02-27T08:59:17","slug":"tear-strength-test","status":"publish","type":"method","link":"https:\/\/www.teartester.com\/vi\/method\/tear-strength-test\/","title":{"rendered":"Th\u1eed nghi\u1ec7m \u0111\u1ed9 b\u1ec1n k\u00e9o"},"content":{"rendered":"

C\u00e1c nguy\u00ean t\u1eafc th\u1eed nghi\u1ec7m \u0111\u01b0\u1ee3c quy \u0111\u1ecbnh trong ti\u00eau chu\u1ea9n ASTM D624<\/h2>\n\n\n\n

ASTM D624<\/a> \u0111\u1ecbnh ngh\u0129a \u0111\u1ed9 b\u1ec1n r\u00e1ch l\u00e0 l\u1ef1c t\u1ed1i \u0111a c\u1ea7n thi\u1ebft \u0111\u1ec3 l\u00e0m r\u00e1ch, kh\u1edfi ph\u00e1t ho\u1eb7c lan r\u1ed9ng v\u1ebft r\u00e1ch, chia cho \u0111\u1ed9 d\u00e0y c\u1ee7a m\u1eabu th\u1eed. Trong qu\u00e1 tr\u00ecnh th\u1eed nghi\u1ec7m, m\u00e1y \u0111o \u0111\u1ed9 b\u1ec1n k\u00e9o s\u1ebd duy tr\u00ec t\u1ed1c \u0111\u1ed9 di chuy\u1ec3n \u0111\u1ea7u k\u1eb9p kh\u00f4ng \u0111\u1ed5i cho \u0111\u1ebfn khi m\u1eabu cao su b\u1ecb r\u00e1ch ho\u00e0n to\u00e0n.<\/p>\n\n\n\n

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\"Th\u1eed<\/figure>\n<\/div>\n\n\n\n
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Th\u1eed nghi\u1ec7m \u0111\u1ed9 b\u1ec1n k\u00e9o \u0111\u1ed1i v\u1edbi cao su v\u00e0 ch\u1ea5t \u0111\u00e0n h\u1ed3i<\/h2>\n\n\n\n

A th\u1eed nghi\u1ec7m \u0111\u1ed9 b\u1ec1n ch\u1ed1ng r\u00e1ch<\/strong> \u00c1p d\u1ee5ng bi\u1ebfn d\u1ea1ng k\u00e9o c\u00f3 ki\u1ec3m so\u00e1t l\u00ean m\u1eabu th\u1eed \u0111\u00e3 \u0111\u01b0\u1ee3c chu\u1ea9n b\u1ecb b\u1eb1ng m\u00e1y th\u1eed k\u00e9o. Th\u1eed nghi\u1ec7m ti\u1ebfp t\u1ee5c cho \u0111\u1ebfn khi m\u1eabu b\u1ecb \u0111\u1ee9t ho\u00e0n to\u00e0n. Do cao su v\u00e0 c\u00e1c v\u1eadt li\u1ec7u \u0111\u00e0n h\u1ed3i c\u00f3 h\u00e0nh vi bi\u1ebfn d\u1ea1ng ph\u1ee9c t\u1ea1p, ti\u00eau chu\u1ea9n ASTM D624 nh\u1ea5n m\u1ea1nh vi\u1ec7c chu\u1ea9n b\u1ecb m\u1eabu th\u1eed, c\u0103n ch\u1ec9nh v\u00e0 t\u1ed1c \u0111\u1ed9 th\u1eed nghi\u1ec7m ph\u1ea3i nh\u1ea5t qu\u00e1n \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o k\u1ebft qu\u1ea3 c\u00f3 th\u1ec3 l\u1eb7p l\u1ea1i.<\/p>\n\n\n\n

C\u1ea7n l\u01b0u \u00fd r\u1eb1ng cao su v\u00e0 ch\u1ea5t \u0111\u00e0n h\u1ed3i<\/strong> ph\u1ea3n \u1ee9ng kh\u00e1c nhau v\u1edbi hi\u1ec7n t\u01b0\u1ee3ng r\u00e1ch t\u00f9y thu\u1ed9c v\u00e0o c\u00f4ng th\u1ee9c, qu\u00e1 tr\u00ecnh \u0111\u00f3ng r\u1eafn, h\u00e0m l\u01b0\u1ee3ng ch\u1ea5t \u0111\u1ed9n v\u00e0 h\u01b0\u1edbng \u0111\u1ecbnh h\u01b0\u1edbng. Do \u0111\u00f3, ti\u00eau chu\u1ea9n ASTM D624 quy \u0111\u1ecbnh m\u1ed9t s\u1ed1 lo\u1ea1i m\u1eabu th\u1eed, m\u1ed7i lo\u1ea1i \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 th\u1ec3 hi\u1ec7n m\u1ed9t c\u01a1 ch\u1ebf r\u00e1ch kh\u00e1c nhau thay v\u00ec m\u1ed9t gi\u00e1 tr\u1ecb chung duy nh\u1ea5t.<\/p>\n<\/div>\n<\/div>\n\n\n\n

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Chu\u1ea9n b\u1ecb m\u1eabu v\u00e0 quy tr\u00ecnh th\u1eed nghi\u1ec7m<\/h2>\n\n\n\n

Vi\u1ec7c th\u1eed nghi\u1ec7m \u0111\u1ed9 b\u1ec1n ch\u1ed1ng r\u00e1ch ch\u00ednh x\u00e1c b\u1eaft \u0111\u1ea7u t\u1eeb vi\u1ec7c chu\u1ea9n b\u1ecb m\u1eabu c\u1ea9n th\u1eadn. C\u00e1c m\u1eabu cao su ph\u1ea3i c\u00f3 \u0111\u1ed9 d\u00e0y \u0111\u1ed3ng \u0111\u1ec1u, c\u00e1c m\u00e9p s\u1ea1ch s\u1ebd v\u00e0 h\u00ecnh d\u1ea1ng ch\u00ednh x\u00e1c. B\u1ea5t k\u1ef3 s\u1ef1 kh\u00f4ng \u0111\u1ed3ng \u0111\u1ec1u n\u00e0o c\u0169ng c\u00f3 th\u1ec3 \u1ea3nh h\u01b0\u1edfng \u0111\u00e1ng k\u1ec3 \u0111\u1ebfn k\u1ebft qu\u1ea3 th\u1eed nghi\u1ec7m.<\/p>\n\n\n\n

G\u1eafn m\u1eabu th\u1eed v\u00e0o ch\u00ednh gi\u1eefa k\u1eb9p c\u1ee7a m\u00e1y th\u1eed k\u00e9o, \u0111\u1ea3m b\u1ea3o m\u1eabu \u0111\u01b0\u1ee3c c\u0103n ch\u1ec9nh ch\u00ednh x\u00e1c \u0111\u1ec3 tr\u00e1nh l\u1ef1c u\u1ed1n ho\u1eb7c l\u1ef1c xo\u1eafn. T\u00e1c d\u1ee5ng l\u1ef1c k\u00e9o v\u1edbi t\u1ed1c \u0111\u1ed9 kh\u00f4ng \u0111\u1ed5i theo quy \u0111\u1ecbnh cho \u0111\u1ebfn khi m\u1eabu b\u1ecb r\u00e1ch ho\u00e0n to\u00e0n. Ghi l\u1ea1i \u0111\u01b0\u1eddng cong l\u1ef1c-bi\u1ebfn d\u1ea1ng v\u00e0 x\u00e1c \u0111\u1ecbnh l\u1ef1c c\u1ef1c \u0111\u1ea1i ho\u1eb7c l\u1ef1c trung b\u00ecnh t\u00f9y theo lo\u1ea1i m\u1eabu th\u1eed \u0111\u00e3 ch\u1ecdn.<\/p>\n<\/div>\n\n\n\n

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\"H\u01b0\u1edbng<\/figure>\n<\/div>\n<\/div>\n\n\n\n

T\u1ea1i sao vi\u1ec7c ki\u1ec3m tra \u0111\u1ed9 b\u1ec1n k\u00e9o l\u1ea1i quan tr\u1ecdng trong c\u00e1c \u1ee9ng d\u1ee5ng cao su<\/h2>\n\n\n\n

Trong qu\u00e1 tr\u00ecnh s\u1eed d\u1ee5ng, c\u00e1c s\u1ea3n ph\u1ea9m cao su hi\u1ebfm khi b\u1ecb h\u1ecfng ch\u1ec9 do s\u1ef1 k\u00e9o gi\u00e3n \u0111\u1ed3ng \u0111\u1ec1u. Thay v\u00e0o \u0111\u00f3, s\u1ef1 h\u1ecfng h\u00f3c th\u01b0\u1eddng b\u1eaft \u0111\u1ea7u t\u1eeb c\u00e1c c\u1ea1nh s\u1eafc nh\u1ecdn, c\u00e1c h\u1ea1t b\u00e1m v\u00e0o ho\u1eb7c c\u00e1c \u0111i\u1ec3m ch\u1ecbu \u1ee9ng su\u1ea5t c\u1ee5c b\u1ed9. Th\u1eed nghi\u1ec7m \u0111\u1ed9 b\u1ec1n r\u00e1ch gi\u00fap c\u00e1c k\u1ef9 s\u01b0 hi\u1ec3u \u0111\u01b0\u1ee3c v\u1ebft r\u00e1ch c\u00f3 th\u1ec3 lan r\u1ed9ng nhanh v\u00e0 d\u1ec5 d\u00e0ng nh\u01b0 th\u1ebf n\u00e0o m\u1ed9t khi \u0111\u00e3 h\u00ecnh th\u00e0nh.<\/p>\n\n\n\n

\u0110\u1ed1i v\u1edbi c\u00e1c \u0111\u1ed9i ki\u1ec3m so\u00e1t ch\u1ea5t l\u01b0\u1ee3ng, th\u1eed nghi\u1ec7m \u0111\u1ed9 b\u1ec1n r\u00e1ch gi\u00fap so s\u00e1nh v\u1eadt li\u1ec7u, ki\u1ec3m so\u00e1t quy tr\u00ecnh v\u00e0 ki\u1ec3m tra h\u00e0ng nh\u1eadp. \u0110\u1ed1i v\u1edbi c\u00e1c nh\u00e0 thi\u1ebft k\u1ebf s\u1ea3n ph\u1ea9m, th\u1eed nghi\u1ec7m n\u00e0y cung c\u1ea5p th\u00f4ng tin chi ti\u1ebft v\u1ec1 m\u1ee9c \u0111\u1ed9 ph\u00f9 h\u1ee3p c\u1ee7a v\u1eadt li\u1ec7u \u0111\u1ed1i v\u1edbi c\u00e1c \u1ee9ng d\u1ee5ng \u0111\u00f2i h\u1ecfi kh\u1eaft khe nh\u01b0 gio\u0103ng \u0111\u1ed9ng ho\u1eb7c m\u00f4i tr\u01b0\u1eddng d\u1ec5 b\u1ecb m\u00e0i m\u00f2n.<\/p>","protected":false},"featured_media":0,"parent":0,"template":"","meta":{"_acf_changed":true},"class_list":["post-589","method","type-method","status-publish","hentry"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.teartester.com\/vi\/wp-json\/wp\/v2\/method\/589","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.teartester.com\/vi\/wp-json\/wp\/v2\/method"}],"about":[{"href":"https:\/\/www.teartester.com\/vi\/wp-json\/wp\/v2\/types\/method"}],"wp:attachment":[{"href":"https:\/\/www.teartester.com\/vi\/wp-json\/wp\/v2\/media?parent=589"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}