Kab lus piav qhia qhov zoo thiab qhov zoo ntawm cov khoom siv tiav - plywood. Lawv muaj hom twg thiab los ntawm tsob ntoo twg lawv tau ua. Plywood yog ib qho ntawm cov khoom nrov tshaj plaws hauv kev lag luam ntoo. Cov khoom siv no tau dhau los ua kev hloov pauv tau zoo rau cov ntoo uas kim thiab tsis tshua muaj nyob hauv peb lub sijhawm. Ib qho ntxiv, vim qee yam ntawm nws cov khoom, plywood zoo dua li txhua yam ntoo zoo ib yam.
Qhov zoo ntawm plywood
Cov ntawv plywood tau siv rau hauv ntau qhov xwm txheej thiab ua ke nrog ntau yam khoom siv tiav. Ua tsaug rau qhov no, ua haujlwm nrog cov khoom siv no tsis yog tsuas yog ua kom yooj yim, tab sis kuj tseem muaj kev nthuav dav ntawm nws daim ntawv thov nce ntxiv.
Kev ua tiav nrog plywood yog txoj haujlwm yooj yim heev, ntxiv rau, yav tom ntej, tsis xav tau kev saib xyuas tshwj xeeb rau cov khoom tiav.
Tsis zoo li cov ntoo uas kim thiab tiag tiag, plywood tuaj yeem siv tau ntawm qhov kub thiab txias, nws yooj yim zam qhov xwm txheej ntawm cov av noo siab thiab siv tshuaj ntxhua khaub ncaws.
Cov yam ntxwv zoo ntawm plywood tuaj yeem yog vim muaj txheej txheem tsim tshwj xeeb. Ib daim ntawv plywood yog txheej ntoo uas tuab heev ua ke, uas hu ua veneers. Tus naj npawb ntawm cov khoom siv ntawm ib daim ntawv plywood yuav tsum yog qhov txawv (3-5-7-9 lossis ntau daim), vim nws ua tsaug rau qhov no uas nws muaj peev xwm ua kom muaj kev sib luag nrog kev hwm rau hauv nruab nrab txheej. Qhov sib npaug no txiav txim siab cov ntsuas no zoo li lub zog siab, tiv taus ntau yam kev thauj khoom thiab lub neej ua haujlwm ntev.
Lub luag haujlwm tseem ceeb tau ua los ntawm qhov tseeb tias hauv txhua txheej ntawm cov ntawv plywood cov ntoo ntoo tau qhia ncaj ncaj rau txheej txheej dhau los. Qee hom plywood tuaj yeem muaj cov lus qhia sib txawv kiag li - vim qhov no, kev tiv thaiv ntxiv rau ntau yam sib tw thiab khoov ntawm cov khoom siv tau ua tiav. Yog tias cov ntawv plywood tau siv los kho cov tsev sab nrauv, txheej txheej ntawm cov khoom siv tau ua ke ua ke siv cov kua nplaum tshwj xeeb tiv taus ya raws.
Kev tsim kho kev lag luam muab tsis tsuas yog cov ntawv plywood, tab sis kuj yog nyob rau hauv daim ntawv ntawm tus kheej lub vaj huam sib luag. Qhov loj ntawm daim ntawv thov rau daim ntawv plywood yog cladding, thaum lub vaj huam sib luag feem ntau yog siv los tsim ntau yam kev faib. Cov khoom siv no feem ntau kuj tseem siv hauv kev tsim cov rooj tog, qhov rooj, ntau lub txee - hauv cov xwm txheej no, plywood tseem tau npog nrog hom tshwj xeeb ntawm veneer. Lwm qhov txiaj ntsig tseem ceeb ntawm plywood yog nws tus phooj ywg ib puag ncig, uas ua rau nws muaj peev xwm siv cov khoom no hauv cov menyuam chav thiab hauv tsev ntawm cov neeg muaj kev tsis haum tshuaj.
Cov hom tseem ceeb ntawm plywood:
- Birch plywood muaj qhov ntsuas siab tshaj plaws thiab yog li ntawd yog siv thaum lub nra hnyav xav tau. Birch ntoo nws tus kheej yog cov khoom siv nrog cov yam ntxwv tseem ceeb muaj zog, thiab ua ke nrog ntau lub tshuab thev naus laus zis, qhov no ua rau muaj txiaj ntsig zoo tshaj plaws. Tias yog vim li cas hom khoom siv no feem ntau siv hauv kev tsim kho, kev tsim kho tshuab thiab lwm thaj chaw ntawm kev tsim khoom, qhov ntau npaum li cas nyob ntawm lub zog ntawm cov khoom siv. Lub luag haujlwm tseem ceeb ib yam hauv kev siv plywood tau ua los ntawm nws cov khoom zoo nkauj. Qhov tseeb yog qhov zoo saib ntxoov ntxoo sov thiab kev ntxhib los mos zoo nkauj yuav ua rau pom kev txawm tias yog cov neeg nyiam ua ntoo zoo tshaj plaws.
- Coniferous plywood nws feem ntau yog siv thaum nws xav tau los ua ke lub zog zoo thiab qhov hnyav ntawm cov khoom hauv ib qho kev daws teeb meem. Txog kev tsim cov hom no, ntoo thuv feem ntau yog siv, cov yam ntxwv uas ua rau nws muaj peev xwm muab lub zog ntsuas tau zoo, tsis muaj kev txhawj xeeb txog qhov hnyav ntawm cov khoom. Coniferous plywood yog qhov xav tau zoo hauv kev tsim vaj tsev ntoo. Tsis tas li ntawd, ua ib txwm tsis tau muab txau nrog cov roj ntoo thuv, cov plywood no tiv taus cov kab mob rot thiab kab mob. Qhov no kuj tseem txhawb nqa los ntawm gluing raws li formaldehyde cov nplaum. Muaj tag nrho cov kev zoo nkauj ntawm ntoo thuv, ntau yam coniferous tau pom lawv siv hauv kev tsim cov rooj tog thiab kho kom zoo nkauj sab hauv. Nws kuj tseem siv feem ntau hauv kev ua haujlwm vov tsev, tso siab rau nws nrog kev ua haujlwm tag nrho ntawm lub ru tsev muag muag. Nws yuav tsum tau sau tseg tias thaum lub sijhawm ua haujlwm, plywood coniferous hloov nws qhov qub. Hais txog qhov tuab, kev nqaim yog 0.03%, thiab qhov ntev thiab dav - 0.02%.
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Laminated plywood ua tsaug rau kev kho saum npoo, nws tiv taus ntau yam ntuj thiab tshuaj lom neeg. Yog li ntawd, nws feem ntau siv hauv kev tsim cov khoom siv tiv taus, uas suav nrog ntau yam kev tsim ua vaj tsev, ntim rau khaws cia thiab thauj zaub mov thiab tshuaj, thiab lwm yam.
Qhov txiaj ntsig tseem ceeb ntawm zaj duab xis ntsib plywood (laminated board) dua lwm qib yog xaiv qhov nyiam dua rau hauv qab laminate, ntxiv rau xim thiab kev ntxhib los mos ntawm saum npoo. Qhov xwm txheej no txawv ntawm laminated plywood los ntawm keeb kwm yav dhau los ntawm lwm yam thiab ua rau nws nyiam tshaj plaws rau cov neeg siv khoom hauv nqe ntau. Cov txheej txheem tsim khoom ntawm cov qib kawm no suav nrog npog nws ob sab nrog daim ntawv-ntawv zaj duab xis raws li phenol-formaldehyde cob. Vim qhov no, nws muaj qhov ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom, nrog rau nce lub zog thiab cov yam ntxwv tiv taus ya raws.
Zaj duab xis ntsib plywood, ua tsaug rau nws cov ntawv loj, tau pom nws siv hauv kev tsim kho cov choj thiab cov tsev tsim khoom, nrog rau lwm cov txheej txheem loj.
