Ukuqaliswa kwebhodi ye-strand eqhelanisiweyo

Ukuqaliswa kwebhodi ye-strand eqhelanisiweyo

Ibhodi ye-strand eqhelanisiweyo

Ibhodi ye-strand oriented (OSB) luhlobo lomthi owenziwe ngobunjineli obufana nebhodi yamasuntswana, eyenziwe ngokudibanisa izinto zokuncamathelisa kunye nokucinezela iileya zemicu yomthi (iiflakes) kwiindlela ezithile zokuqhelaniswa.Yaqanjwa nguArmin Elmendorf eCalifornia ngo-1963 [1].I-OSB inokuba nomphezulu orhabaxa kunye noguquguqukayo kunye nemicu nganye ejikeleze i-2.5 cm × 15 cm (1.0 nge-5.9 intshi), ilele ngokungafaniyo enye kwenye, kwaye iveliswa kwiindidi ezahlukeneyo kunye nobukhulu.

Usebenzisa
I-OSB yimathiriyeli eneempawu ezithandekayo zoomatshini ezenza ukuba ifaneleke ngokukodwa izicelo zokuthwala umthwalo kulwakhiwo.[2]Ngoku ithandwa kakhulu kuneplywood, iyalela i-66% yemarike yephaneli yolwakhiwo lwaseMntla Melika. [3]Olona setyenziso luxhaphakileyo lufana nokushela iindonga, umgangatho, kunye nophahla.Ukusetyenziswa kodonga lwangaphandle, iipaneli ziyafumaneka kunye ne-radiant-barrier layer laminated ukuya kwelinye icala;oku kunciphisa ukufakwa kunye nokwandisa ukusebenza kwamandla emvulophu yokwakha.I-OSB ikwasetyenziswa kwimveliso yefenitshala.

Ukuvelisa
Ibhodi ye-strand ejoliswe kwi-oriented yenziwa ngokweemethi ezibanzi ukusuka kumaleko anqamlezileyo acekethekileyo, amacwecwe amaplanga axinzelelwe kwaye adityaniswe kunye ne-wax kunye ne-synthetic resin adhesives.

Iintlobo ze-adhesive resins ezisetyenzisiweyo ziquka: i-urea-formaldehyde (i-OSB uhlobo lwe-1, i-nonstructural, i-nonwaterproof);iglue esekelwe kwi-isocyanate (okanye i-PMDI i-poly-methylene diphenyl diisocyanate esekelwe) kwimimandla yangaphakathi ene-melamine-urea-formaldehyde okanye i-phenol formaldehyde resin glues ebusweni (uhlobo lwe-OSB 2, isakhiwo, ukuchasana kwamanzi ebusweni);i-phenol formaldehyde resin kuyo yonke (iintlobo ze-OSB 3 kunye ne-4, i-structural, yokusetyenziswa kwindawo efumileyo nangaphandle).[4]

Iingqimba zenziwe ngokuqhekeza iinkuni zibe yimicu, ehluzwayo kwaye ijongiswe kwibhanti okanye iingcingo zocingo.Imethi yenziwe kumgca wokwenza.Imicu yokhuni kumaleko angaphandle ihambelana ne-axis yamandla ephaneli, ngelixa iileyile zangaphakathi zi-perpendicular.Inani leeleyile ezibekiweyo lichongwa ngokuyinxenye ngobunzima bephaneli, kodwa lilinganiselwe ngezixhobo ezifakwe kwindawo yokuvelisa.Iileya zomntu ngamnye zinokwahluka ngobukhulu ukunika ungqimba lwephaneli egqityiweyo eyahlukeneyo (ngokwesiqhelo, i-15 cm (5.9 ngo) umaleko uya kuvelisa i-15 mm (0.59 ngo) ubukhulu bephaneli[catshulwa]).I-mat ifakwe kwi-press ye-thermal ukuze icinezele ii-flakes kwaye idibanise ngokusebenza kobushushu kunye nokunyangwa kwe-resin egqunywe kwiiflakes.Iiphaneli zomntu ngamnye zisikwa kwiimethi zibe yimilinganiselo egqityiweyo.Uninzi lwe-OSB yehlabathi yenziwe eMelika naseKhanada kwiindawo ezinkulu zemveliso.

Iimveliso ezinxulumeneyo
Izinto ezingaphandle kweenkuni zisetyenzisiwe ukuvelisa iimveliso ezifana ne-OSB.Ibhodi yestraw eqhelanisiweyo yibhodi yobunjineli eyenziwe ngokucanda indiza kwaye yenziwe ngokudibanisa izinto ezincamathelayo ze-P-MDI kwaye iileya zokucinezela ezishushu zendiza kwiindlela ezithile.Ibhodi ye-Strand nayo inokwenziwa kwi-bagasse.

Imveliso
Ngowama-2005, imveliso yaseKhanada yayizi-10,500,000 m2 (113,000,000 sq ft) (3⁄8 in okanye 9.53 mm isiseko) yaye i-8,780,000 m2 (94,500,000 sq ft) (3⁄3, phantse yonke iUnited States okanye iphelele) yathunyelwa kumazwe angaphandle. .[6]Ngo-2014, iRomania yaba lelona lizwe likhulu le-OSB ethumela ngaphandle eYurophu, kunye ne-28% yokuthunyelwa ngaphandle eRussia kunye ne-16% ukuya eUkraine.

Iipropati
Ukulungelelaniswa kwenkqubo yokuvelisa kunokuchaphazela ubukhulu, ubungakanani bepaneli, amandla, kunye nokuqina.Iiphaneli ze-OSB azikho izithuba zangaphakathi okanye i-voids, kwaye ziyakwazi ukumelana namanzi, nangona zifuna i-membrane ezongezelelweyo ukuze zifezekise ukungabikho kwamanzi kwaye azikhuthazwa ukuba zisetyenziswe ngaphandle.Imveliso egqityiweyo ineempawu ezifana neplywood, kodwa iyafana kwaye inexabiso eliphantsi.[8]Xa ivavanyelwa ukusilela, i-OSB inomthamo omkhulu wokuthwala umthwalo kuneephaneli zomthi ogayiweyo.[9]Ithathe indawo yeplywood kwiindawo ezininzi, ngakumbi imarike yephaneli yolwakhiwo lwaseMntla Melika.

Ngelixa i-OSB ingenayo inkozo eqhubekayo njengomthi wendalo, ine-axis apho amandla ayo makhulu.Oku kunokubonwa ngokuqwalasela ukulungelelaniswa kweetshiphusi zokhuni ezingaphezulu.

Zonke iipaneli zokusetyenziswa kwezakhiwo ezenziwe ngamaplanga zinokusikwa kwaye zifakwe kunye neentlobo zezixhobo ezifanayo kunye nemithi eqinile.

Impilo nokhuseleko
Iiresin ezisetyenzisiweyo ukwenza i-OSB ziphakamise imibuzo malunga nokuba kungenzeka ukuba i-OSB ikhuphe iikhompawundi eziguquguqukayo ze-organic ezifana ne-formaldehyde.I-Urea-formaldehyde inetyhefu ngakumbi kwaye kufuneka igwenywe ekusebenziseni ekhaya.Iimveliso zePhenol-formaldehyde zithathwa ngokuba azinabungozi.Ezinye iindidi ezintsha ze-OSB, ezibizwa ngokuba ziiphaneli ze-OSB “zesizukulwana esitsha”, zisebenzisa iintlaka ze-isocyanate ezingenayo i-formaldehyde kwaye zithathwa njengezingaguqukiyo xa zinyangwa.[10]Amaqela arhweba kwimizi-mveliso athi ukukhutshwa kwe-formaldehyde evela kuMntla Merika we-OSB “akunamsebenzi okanye akukho kwaphela”.[11]

Abanye abavelisi banyanga iitshiphusi zokhuni ngeekhompawundi ezahlukeneyo zeborate ezinetyhefu kwintubi, ooqongqothwane ababhodla iinkuni, ukungunda, kunye nokungunda, kodwa hayi izilwanyana ezanyisayo kwidosi esetyenziswayo.

Iintlobo
Amabakala amahlanu e-OSB achazwe kwi-EN 300 ngokwemigaqo yokusebenza kwawo ngoomatshini kunye nokumelana nokuchaneka kokufuma:[2]

OSB/0 – Akukho formaldehyde yongeziweyo
I-OSB / 1 - Iibhodi zenjongo ngokubanzi kunye neebhodi zokufakelwa kwangaphakathi (kubandakanywa nefenitshala) yokusetyenziswa kwiimeko ezomileyo
I-OSB / 2 - Iibhodi ezithwala imithwalo yokusetyenziswa kwiimeko ezomileyo
I-OSB / 3 - Iibhodi ezithwala imithwalo yokusetyenziswa kwiimeko ezifumileyo
I-OSB / 4 - Iibhodi ezithwala umthwalo onzima wokusetyenziswa kwiimeko ezifumileyo