{"id":9588,"date":"2011-06-07T08:53:24","date_gmt":"2011-06-07T01:53:24","guid":{"rendered":"http:\/\/vafs.gov.vn\/vn\/2011\/06\/nghien-cuu-lua-chon-che-do-say-go-duoc-lam-nguyen-lieu-san-xuat-van-san\/"},"modified":"2015-05-19T14:22:36","modified_gmt":"2015-05-19T07:22:36","slug":"nghien-cuu-lua-chon-che-do-say-go-duoc-lam-nguyen-lieu-san-xuat-van-san","status":"publish","type":"post","link":"https:\/\/vafs.gov.vn\/vn\/nghien-cuu-lua-chon-che-do-say-go-duoc-lam-nguyen-lieu-san-xuat-van-san\/","title":{"rendered":"Nghi\u00ean c\u1ee9u l\u1ef1a ch\u1ecdn ch\u1ebf \u0111\u1ed9 s\u1ea5y g\u1ed7 \u0110\u01b0\u1edbc l\u00e0m nguy\u00ean li\u1ec7u s\u1ea3n xu\u1ea5t v\u00e1n s\u00e0n"},"content":{"rendered":"

Nguy\u1ec5n Xu\u00e2n Hi\u00ean, \u0110\u1ed7 V\u0169 Th\u1eafng<\/strong><\/p>\n

Nguy\u1ec5n Th\u1ecb Minh Xu\u00e2n<\/strong><\/p>\n

Vi\u1ec7n Khoa h\u1ecdc L\u00e2m nghi\u1ec7p Vi\u1ec7t Nam<\/em><\/p>\n

T\u00d3M T\u1eaeT<\/strong><\/p>\n

Tr\u00ean c\u01a1 s\u1edf t\u00ecm hi\u1ec3u l\u00fd thuy\u1ebft v\u1ec1 s\u1ea5y g\u1ed7 x\u1ebb, \u0111\u1ec1 t\u00e0i ti\u1ebfn h\u00e0nh th\u1ef1c nghi\u1ec7m s\u1ea5y thanh g\u1ed7 \u0110\u01b0\u1edbc \u1edf ba ch\u1ebf \u0111\u1ed9 s\u1ea5y (40 – 600<\/sup>, 50 – 700<\/sup>, 60 – 800<\/sup>C) \u0111\u1ec3 l\u1ef1a ch\u1ecdn m\u1ed9t ch\u1ebf \u0111\u1ed9 s\u1ea5y c\u00f3 ch\u1ea5t l\u01b0\u1ee3ng g\u1ed7 sau s\u1ea5y t\u1ed1t nh\u1ea5t cho g\u1ed7 \u0110\u01b0\u1edbc l\u00e0m nguy\u00ean li\u1ec7u s\u1ea3n xu\u1ea5t v\u00e1n s\u00e0n. K\u1ebft qu\u1ea3 cho bi\u1ebft g\u1ed7 \u0110\u01b0\u1edbc ngay sau khi ch\u1eb7t h\u1ea1 v\u00e0 c\u01b0a x\u1ebb c\u00f3 \u0111\u1ed9 \u1ea9m ban \u0111\u1ea7u th\u1ea5p (43,84 – 44,91 %). Trong v\u00e0 sau qu\u00e1 tr\u00ecnh s\u1ea5y, g\u1ed7 d\u1ec5 b\u1ecb n\u1ee9t v\u1ee1, s\u1ed1 l\u01b0\u1ee3ng v\u1ebft n\u1ee9t tr\u00ean thanh g\u1ed7 t\u1eeb 3 – 11 v\u1ebft, chi\u1ec1u r\u1ed9ng v\u1ebft n\u1ee9t 0.5 – 3 mm. D\u1ef1a v\u00e0o k\u1ebft qu\u1ea3 ch\u1ea5t l\u01b0\u1ee3ng g\u1ed7 sau s\u1ea5y \u1edf ba ch\u1ebf \u0111\u1ed9 s\u1ea5y, \u0111\u1ec1 t\u00e0i \u0111\u1ec1 xu\u1ea5t n\u00ean s\u1ea5y g\u1ed7 x\u1ebb g\u1ed7 \u0110\u01b0\u1edbc n\u00f3i chung c\u00f3 chi\u1ec1u d\u00e0y 25 mm v\u00e0 ph\u00f4i thanh c\u00f3 k\u00edch th\u01b0\u1edbc 70* 25* 750 mm n\u00f3i ri\u00eang v\u1edbi nhi\u1ec7t \u0111\u1ed9 s\u1ea5y kho\u1ea3ng 40 – 600<\/sup> C.<\/p>\n

T\u1eeb kh\u00f3a: <\/strong>G\u1ed7 \u0110\u01b0\u1edbc, ch\u1ebf \u0111\u1ed9 s\u1ea5y, nguy\u00ean li\u1ec7u s\u1ea3n xu\u1ea5t v\u00e1n s\u00e0n<\/em><\/p>\n

M\u1ede \u0110\u1ea6U<\/strong><\/p>\n

Hi\u1ec7n nay, g\u1ed7 \u0110\u01b0\u1edbc \u0111ang \u0111\u00ad\u01b0\u1ee3c nghi\u00ean c\u1ee9u s\u1ea3n xu\u1ea5t v\u00e1n s\u00e0n, m\u1ed9t lo\u1ea1i h\u00ecnh s\u1ea3n ph\u1ea9m d\u1ea1ng kh\u00f4ng ph\u1ee7 b\u1ec1 m\u1eb7t (Finger Joint sawntimber)<\/em>, lo\u1ea1i s\u1ea3n ph\u1ea9m n\u00e0y y\u00eau c\u1ea7u nguy\u00ean li\u1ec7u c\u00f3 ch\u1ea5t l\u00ad\u01b0\u1ee3ng t\u00ad\u01b0\u01a1ng \u0111\u1ed1i cao nh\u00ad\u01b0: m\u00e0u s\u1eafc \u0111\u1ed3ng \u0111\u1ec1u, kh\u00f4ng \u0111\u01b0\u1ee3c mo m\u00f3p cong v\u00eanh bi\u1ebfn d\u1ea1ng v\u00e0 \u0111\u1eb7c bi\u1ec7t l\u00e0 n\u1ee9t v\u1ee1 trong qu\u00e1 tr\u00ecnh ch\u1ebf bi\u1ebfn s\u1eed d\u1ee5ng. M\u1ed9t trong nh\u1eefng qui tr\u00ecnh k\u1ef9 thu\u1eadt s\u1ea3n xu\u1ea5t v\u00e1n s\u00e0n \u0111\u01b0\u00ad\u1ee3c nhi\u1ec1u c\u01a1 s\u1edf s\u1ea3n xu\u1ea5t th\u1ef1c hi\u1ec7n theo c\u00e1c b\u00ad\u01b0\u1edbc: G\u1ed7 tr\u00f2n – c\u1eaft kh\u00fac – x\u1ebb v\u00e1n – x\u1ebb thanh – s\u1ea5y thanh – gia c\u00f4ng thanh – gia c\u00f4ng chi ti\u1ebft – \u0111\u00e1nh nh\u1eb5n – ho\u00e0n thi\u1ec7n s\u1ea3n ph\u1ea9m – nh\u1eadp kho.<\/em>Theo qu\u00e1 tr\u00ecnh c\u00f4ng ngh\u1ec7 n\u00e0y, g\u1ed7 x\u1ebb kh\u00f4ng s\u1ea5y ngay m\u00e0 \u0111\u01b0\u00ad\u1ee3c t\u1ea1o ra ph\u00f4i thanh, sau \u0111\u00f3 ti\u1ebfn h\u00e0nh s\u1ea5y c\u00e1c ph\u00f4i thanh.Nh\u00ecn v\u00e0o qui tr\u00ecnh \u1edf tr\u00ean, ngo\u00e0i c\u00f4ng \u0111o\u1ea1n c\u00ad\u01b0a x\u1ebb, s\u1ea5y g\u1ed7 l\u00e0 m\u1ed9t c\u00f4ng \u0111o\u1ea1n quan tr\u1ecdng mang t\u00ednh ch\u1ea5t quy\u1ebft \u0111\u1ecbnh \u0111\u1ebfn ch\u1ea5t l\u00ad\u01b0\u1ee3ng s\u1ea3n ph\u1ea9m v\u00e1n s\u00e0n, l\u00e0m cho s\u1ea3n ph\u1ea9m s\u1eed d\u1ee5ng l\u00e2u d\u00e0i, c\u00f3 h\u00ecnh d\u1ea1ng v\u00e0 k\u00edch th\u00ad\u01b0\u1edbc \u1ed5n \u0111\u1ecbnh, c\u00f3 \u0111\u1ed9 b\u1ec1n c\u01a1 h\u1ecdc t\u1ed1t, d\u1ec5 gia c\u00f4ng ch\u1ebf bi\u1ebfn, c\u00f3 \u0111\u1ed9 d\u1eabn \u0111i\u1ec7n v\u00e0 nhi\u1ec7t th\u1ea5p … \u0110\u00e1p \u1ee9ng \u0111\u01b0\u00ad\u1ee3c y\u00eau c\u1ea7u s\u1eed d\u1ee5ng.<\/p>\n

Ch\u00ednh v\u00ec v\u1eady, vi\u1ec7c nghi\u00ean c\u1ee9u \u0111\u1ec3 t\u00ecm ch\u1ebf \u0111\u1ed9 s\u1ea5y nh\u1eb1m gi\u1ea3m thi\u1ec3u khuy\u1ebft t\u1eadt, \u0111\u1eb7c bi\u1ec7t l\u00e0 n\u1ee9t v\u1ee1 c\u1ee7a g\u1ed7 \u0110\u01b0\u1edbc sau s\u1ea5y, l\u00e0m t\u0103ng ch\u1ea5t l\u00ad\u01b0\u1ee3ng g\u1ed7 s\u1ea5y, th\u00e1o g\u1ee1 nh\u1eefng v\u00ad\u01b0\u1edbng m\u1eafc m\u00e0 th\u1ef1c t\u1ebf \u0111ang g\u1eb7p ph\u1ea3i l\u00e0 v\u1ea5n \u0111\u1ec1 c\u1ea7n thi\u1ebft v\u00e0 c\u1ea5p b\u00e1ch. Tr\u00ean c\u01a1 s\u1edf \u0111\u00f3 ch\u00fang t\u00f4i ti\u1ebfn h\u00e0nh\u0111\u1ec1 t\u00e0i: “Nghi\u00ean c\u1ee9u l\u1ef1a ch\u1ecdn ch\u1ebf \u0111\u1ed9 s\u1ea5y g\u1ed7 \u0110\u01b0\u1edbc l\u00e0m nguy\u00ean li\u1ec7u \u0111\u1ec3 s\u1ea3n xu\u1ea5t v\u00e1n s\u00e0n”.<\/em><\/strong><\/p>\n

(T\u1ea1p ch\u00ed Khoa h\u1ecdc L\u00e2m nghi\u1ec7p, s\u1ed1 1 n\u0103m 2011, trang 1760-1768)<\/em><\/p>\n","protected":false},"excerpt":{"rendered":"

\nTrên c\u01a1 s\u1edf tìm hi\u1ec3u lý thuy\u1ebft v\u1ec1 s\u1ea5y g\u1ed7 x\u1ebb, \u0111\u1ec1 tài ti\u1ebfn hành th\u1ef1c nghi\u1ec7m s\u1ea5y thanh g\u1ed7 \u0110\u01b0\u1edbc \u1edf ba ch\u1ebf \u0111\u1ed9 s\u1ea5y (40 – 600<\/sup>, 50 – 700<\/sup>, 60 – 800<\/sup>C) \u0111\u1ec3 l\u1ef1a ch\u1ecdn m\u1ed9t ch\u1ebf \u0111\u1ed9 s\u1ea5y có ch\u1ea5t l\u01b0\u1ee3ng g\u1ed7 sau s\u1ea5y t\u1ed1t nh\u1ea5t cho g\u1ed7 \u0110\u01b0\u1edbc làm nguyên li\u1ec7u s\u1ea3n xu\u1ea5t ván sàn. K\u1ebft qu\u1ea3 cho bi\u1ebft g\u1ed7 \u0110\u01b0\u1edbc ngay sau khi ch\u1eb7t h\u1ea1 và c\u01b0a x\u1ebb có \u0111\u1ed9 \u1ea9m ban \u0111\u1ea7u th\u1ea5p (<\/span>43,84 – 44,91 %)<\/span>. Trong và sau quá trình s\u1ea5y, g\u1ed7 d\u1ec5 b\u1ecb n\u1ee9t v\u1ee1, s\u1ed1 l\u01b0\u1ee3ng v\u1ebft n\u1ee9t trên thanh g\u1ed7 t\u1eeb 3 – 11 v\u1ebft, chi\u1ec1u r\u1ed9ng v\u1ebft n\u1ee9t 0.5 – 3 mm.<\/span><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[18],"tags":[],"_links":{"self":[{"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/posts\/9588"}],"collection":[{"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/comments?post=9588"}],"version-history":[{"count":2,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/posts\/9588\/revisions"}],"predecessor-version":[{"id":15253,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/posts\/9588\/revisions\/15253"}],"wp:attachment":[{"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/media?parent=9588"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/categories?post=9588"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/tags?post=9588"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}