Kev siv ntoo muaj keeb kwm ntev, los ntawm cov cuab yeej Pob Zeb Hnub Nyoog mus rau cov tsheb medieval thiab cov rooj tog zaum niaj hnub. Nws tseem yog cov khoom tseem ceeb niaj hnub no nyob rau hauv daim ntawv thov xws li los ntawm cov ntoo-framed tsev mus rau tus ncej hluav taws xob. Tab sis ntoo muaj qhov tsis zoo, nrog rau kev nkag mus rau cov kab tsuag, noo noo, thiab warping.
Ntoo yog cov khoom siv ntuj tsim - kev sib xyaw ntawm cellulose fibers thiab lignin. Qee daim ntawv thov sib xyaw, suav nrog cov pas nuv ntses thiab golf qws shafts, replicate lub ntuj tsim ntawm ntoo xws li xyoob. Tab sis man-made composites muaj qhov zoo ntawm cov ntoo:
Composites yog ruaj - ntoo yuav nws thiaj li rot, tab sis composites yog tsim kom kav ntev. Xav txog kev lag luam hauv hiav txwv: cov nkoj ntoo xav tau kev saib xyuas zoo kom kav lub neej ntawm lawv cov tswv, thaum muaj ntau lub nkoj sib xyaw tuaj yeem nyob hauv av rau ntau tshaj 50 xyoo nrog kev tu txhua hnub. Cov ntaub ntawv sib xyaw yog qhov ruaj khov - lawv khaws lawv cov duab thiab loj thaum kub lossis txias, ntub lossis qhuav. Ntawm qhov tod tes, ntoo nthuav thiab cog lus nrog kev hloov pauv ntawm cov av noo. Composites yog kev saib xyuas tsis tshua muaj - qhov tseem ceeb hauv kev siv xws li cov chaw nyob. Cov decks sib xyaw tuaj yeem ntxuav nrog xab npum thiab dej, thaum cov ntoo decks yuav tsum tau ntxuav tsis tu ncua thiab tshuaj xyuas qhov rot, xuab zeb thiab staining. Composites yooj yim rau kev thauj mus los thiab nruab - vim lawv lub teeb yuag, cov khoom sib xyaw yog cov khoom siv zoo tshaj plaws rau cov ntoo hauv cov ntawv thov xws li cov khoom siv hluav taws xob: lawv raug nqi tsawg dua rau kev thauj mus los thiab yooj yim rau nruab rau hauv thaj chaw deb tshaj li lawv cov ntoo counterparts. Composites tiv taus cov kab tsuag - kab tsuag, ntoo ntsaum, kab thiab lwm yam kab tsuag tuaj yeem tua ntoo thiab ua rau muaj kev puas tsuaj loj. Composites tsis muaj kab tsuag, ua rau lawv zoo tagnrho rau txhua yam ntawm qhov rais thav duab mus rau khaws cov phab ntsa. Cov no tsuas yog qee qhov laj thawj vim li cas cov khoom sib xyaw yuav yog cov khoom siv zoo dua li cov ntoo.
