<\/span> T\u00fai d\u1ec7t pp ch\u00ednh h\u00e3ng<\/span><\/figcaption><\/figure>\n1. Dung sai m\u1eadt \u0111\u1ed9 b\u1ec7n.<\/strong><\/em><\/span><\/p>\nDung sai m\u1eadt \u0111\u1ed9 b\u1ec7n \u0111\u1ec1 c\u1eadp \u0111\u1ebfn nhi\u1ec1u h\u01a1n ho\u1eb7c \u00edt h\u01a1n c\u00e1c d\u1ea3i b\u0103ng so v\u1edbi m\u1eadt \u0111\u1ed9 b\u1ec7n ti\u00eau chu\u1ea9n nh\u1ea5t \u0111\u1ecbnh.<\/span><\/p>\n<\/span> T\u00fai d\u1ec7t PP xu\u1ea5t kh\u1ea9u<\/span><\/figcaption><\/figure>\n2. Kh\u1ed1i l\u01b0\u1ee3ng tr\u00ean m\u1ed9t \u0111\u01a1n v\u1ecb di\u1ec7n t\u00edch c\u1ee7a t\u1ea5m v\u1ea3i d\u1ec7t thoi.<\/strong><\/em><\/span><\/p>\n\u0110\u01a1n v\u1ecb di\u1ec7n t\u00edch tr\u1ecdng l\u01b0\u1ee3ng c\u1ee7a v\u1ea3i d\u1ec7t thoi \u0111\u01b0\u1ee3c bi\u1ec3u th\u1ecb b\u1eb1ng tr\u1ecdng l\u01b0\u1ee3ng m\u00e9t vu\u00f4ng, l\u00e0 m\u1ed9t ch\u1ec9 ti\u00eau k\u1ef9 thu\u1eadt quan tr\u1ecdng c\u1ee7a v\u1ea3i d\u1ec7t thoi. Tr\u1ecdng l\u01b0\u1ee3ng gam tr\u00ean m\u00e9t vu\u00f4ng ch\u1ee7 y\u1ebfu ph\u1ee5 thu\u1ed9c v\u00e0o m\u1eadt \u0111\u1ed9 s\u1ee3i d\u1ecdc v\u00e0 s\u1ee3i ngang v\u00e0 \u0111\u1ed9 d\u00e0y c\u1ee7a s\u1ee3i ph\u1eb3ng. Tr\u1ecdng l\u01b0\u1ee3ng gam tr\u00ean m\u00e9t vu\u00f4ng \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn \u0111\u1ed9 b\u1ec1n k\u00e9o v\u00e0 kh\u1ea3 n\u0103ng ch\u1ecbu t\u1ea3i c\u1ee7a v\u1ea3i d\u1ec7t thoi. Tr\u1ecdng l\u01b0\u1ee3ng gam tr\u00ean m\u00e9t vu\u00f4ng l\u00e0 m\u1ed9t ph\u1ea7n ch\u00ednh c\u1ee7a vi\u1ec7c ki\u1ec3m so\u00e1t chi ph\u00ed c\u1ee7a doanh nghi\u1ec7p s\u1ea3n xu\u1ea5t.<\/span><\/p>\n<\/span> T\u00fai PP d\u1ec7t cao c\u1ea5p<\/span><\/figcaption><\/figure>\n3. T\u1ea3i tr\u1ecdng k\u00e9o v\u1ea3i d\u1ec7t thoi.<\/strong><\/em><\/span><\/p>\nT\u1ea3i tr\u1ecdng k\u00e9o c\u00f2n \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 \u0111\u1ed9 b\u1ec1n k\u00e9o, \u0111\u1ed9 b\u1ec1n k\u00e9o. V\u1ea3i d\u1ec7t thoi ch\u1ecbu t\u1ea3i tr\u1ecdng k\u00e9o theo c\u1ea3 chi\u1ec1u d\u1ecdc v\u00e0 chi\u1ec1u ngang, v\u00ec v\u1eady n\u00f3 \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 t\u1ea3i tr\u1ecdng k\u00e9o s\u1ee3i d\u1ecdc v\u00e0 s\u1ee3i ngang.<\/span><\/p>\n<\/span> T\u00fai d\u1ec7t PP gi\u00e1 r\u1ebb<\/span><\/figcaption><\/figure>\n4. Chi\u1ec1u r\u1ed9ng.<\/strong><\/em><\/span><\/p>\nChi\u1ec1u r\u1ed9ng c\u1ee7a c\u00e1c lo\u1ea1i v\u1ea3i d\u1ec7t kh\u00e1c nhau \u1ea3nh h\u01b0\u1edfng tr\u1ef1c ti\u1ebfp \u0111\u1ebfn qu\u00e1 tr\u00ecnh l\u00e0m t\u00fai. \u0110\u1ed1i v\u1edbi v\u1ea3i \u1ed1ng, chi\u1ec1u r\u1ed9ng \u0111\u01b0\u1ee3c bi\u1ec3u th\u1ecb b\u1eb1ng s\u1ee3i d\u1ecdc, v\u00e0 s\u1ee3i d\u1ecdc b\u1eb1ng m\u1ed9t n\u1eeda chu vi c\u1ee7a chu vi. T\u1ef7 l\u1ec7 co r\u00fat chi\u1ec1u r\u1ed9ng, chi\u1ec1u r\u1ed9ng c\u1ee7a t\u1ea5t c\u1ea3 c\u00e1c lo\u1ea1i v\u1ea3i d\u1ec7t thoi sau khi d\u1ec7t v\u00e0 cu\u1ed9n, sau khi th\u00e1o cu\u1ed9n, c\u1eaft, in v\u00e0 may, chi\u1ec1u r\u1ed9ng c\u1ee7a t\u00fai nh\u1ecf h\u01a1n m\u1ed9t ch\u00fat so v\u1edbi chi\u1ec1u r\u1ed9ng l\u00fac cu\u1ed9n, ch\u00fang t\u00f4i g\u1ecdi l\u00e0 chi\u1ec1u r\u1ed9ng co r\u00fat.<\/span><\/p>\n<\/span> T\u00fai PP d\u1ec7t H\u00e0 N\u1ed9i<\/span><\/figcaption><\/figure>\n5. C\u1ea3m nh\u1eadn.<\/strong><\/em><\/span><\/p>\n\n- \u2713<\/strong>V\u1ea3i d\u1ec7t l\u1ee5a ph\u1eb3ng PP t\u1ea1o c\u1ea3m gi\u00e1c d\u00e0y h\u01a1n, r\u1ed9ng h\u01a1n v\u00e0 c\u1ee9ng h\u01a1n.<\/span><\/li>\n
- \u2713<\/strong>B\u0103ng HDPE b\u1ec7n c\u1ea3m th\u1ea5y m\u1ec1m m\u1ea1i, b\u00f4i tr\u01a1n v\u00e0 kh\u00f4ng d\u00e0y \u0111\u1eb7c.<\/span><\/li>\n
- \u2713<\/strong>Th\u00eam canxi masterbatch v\u00e0o v\u1eadt li\u1ec7u l\u1ee5a ph\u1eb3ng PP s\u1ebd l\u00e0m cho b\u00e0n tay c\u00f3 c\u1ea3m gi\u00e1c r\u1ea5t r\u1ed9ng v\u00e0 th\u00eam \u00edt HDPE trong PP s\u1ebd l\u00e0m cho n\u00f3 m\u1ec1m h\u01a1n.<\/span><\/li>\n
- \u2713<\/strong>D\u00e2y d\u1eb9t b\u1ea3n h\u1eb9p, d\u1ec7t ph\u1eb3ng, s\u1edd tay v\u00e0o m\u1ec1m m\u1ea1i, d\u00e2y d\u1eb9t r\u1ed9ng, khi d\u1ec7t v\u1ea3i c\u00f3 nhi\u1ec1u d\u00e2y g\u1ea5p kh\u00fac, s\u1edd tay c\u00f3 c\u1ea3m gi\u00e1c th\u00f4 r\u00e1p.<\/span><\/li>\n<\/ul>\n
<\/span> T\u00fai PP d\u1ec7t \u0111\u1ef1ng h\u00e0ng<\/span><\/figcaption><\/figure>\n<\/span> Bao t\u00fai d\u1ec7t PP<\/span><\/figcaption><\/figure>\n<\/span> Bao b\u00ec PP<\/span><\/figcaption><\/figure>\n<\/span>Quy tr\u00ecnh s\u1ea3n xu\u1ea5t bao b\u00ec PP d\u1ec7t<\/strong><\/em><\/span><\/span><\/h3>\nNguy\u00ean li\u1ec7u ch\u00ednh \u0111\u1ec3 s\u1ea3n xu\u1ea5t n\u01b0\u1edbc ngo\u00e0i l\u00e0 polyetylen (PE), c\u00f2n s\u1ea3n xu\u1ea5t trong n\u01b0\u1edbc ch\u1ee7 y\u1ebfu l\u00e0 polypropylen (PP), l\u00e0 m\u1ed9t lo\u1ea1i nh\u1ef1a nhi\u1ec7t d\u1ebbo thu \u0111\u01b0\u1ee3c b\u1eb1ng ph\u1ea3n \u1ee9ng tr\u00f9ng h\u1ee3p etylen. Trong c\u00f4ng nghi\u1ec7p, \u0111\u1ed3ng tr\u00f9ng h\u1ee3p c\u1ee7a ethylene v\u00e0 m\u1ed9t l\u01b0\u1ee3ng nh\u1ecf alpha-olefin c\u0169ng \u0111\u01b0\u1ee3c bao g\u1ed3m:<\/span><\/p>\n\n\n\n<\/span><\/td>\n | <\/span><\/td>\n | <\/span><\/td>\n<\/tr>\n\n<\/span><\/td>\n | <\/span><\/td>\n | <\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n | |