OSB (OrientedStrandBoard) ndi mtundu wa matabwa opangidwa ndi matabwa ofanana ndi particle board, powonjezera zigawo zamitengo yamatabwa (flakes) mumayendedwe enaake omwe amapanga binder ndiyeno kufinya nkhuni.
Idapangidwa mu 1963 ndi Armin Elmendorf waku California. OSB ikhoza kukhala ndi malo owoneka bwino komanso owoneka bwino, okhala ndi mizere payokha pafupifupi 2.5 cm x 15 cm (1.0 x 5.9 mkati) yoyikidwa mosagwirizana wina ndi mzake, komanso mumitundu ndi makulidwe osiyanasiyana.

Cholinga cha OSB

OSB ndi zinthu zomwe zili ndi makina abwino, zomwe zimapangitsa kuti zikhale zoyenera kwambiri zonyamula katundu pomanga.
Tsopano ndiyotchuka kwambiri kuposa plywood, yomwe imawerengera 66% ya msika wamapangidwe. Zomwe zimagwiritsidwa ntchito nthawi zambiri zimakhala ngati zotchingira makoma, pansi ndi padenga.
Kwa ntchito zakunja zakunja, mapanelo amatha kukhala laminated ndi chotchinga chowunikira mbali imodzi; izi zimathandizira kukhazikitsa ndikuwongolera magwiridwe antchito amphamvu a envelopu yomanga. OSB imagwiritsidwanso ntchito popanga mipando.

Kupanga Mabodi a OSB

Mitundu yazitsulo zomatira zomwe zimagwiritsidwa ntchito ndi OSB zikuphatikizapo: urea-formaldehyde (OSB mtundu 1, wosamangira, wopanda madzi); zomatira zochokera ku isocyanate (kapena PMDI polymethylene diphenyl diisocyanate-based) m'madera amkati okhala ndi melamine-urea-formaldehyde kapena phenol-formaldehyde Resin glue pamwamba (OSB mtundu 2, structural, pamwamba pamadzi); phenolic resin (mtundu wa OSB 3 ndi 4, mtundu wamapangidwe, malo onyowa ndi akunja).

Zigawozo zimapangidwira podula nkhunizo kuti zikhale zingwe zomwe zimapimidwa ndikuziyika pa lamba kapena mawaya. Ma cushion amapangidwa pa mzere woumba. Ma slats a matabwa a mawonekedwe akunja amagwirizana ndi mphamvu yolimba ya mapanelo, pamene gawo lamkati ndilolunjika. Chiwerengero cha zigawo zomwe zimayikidwa zimadalira gawo la makulidwe a gululo, koma zimachepetsedwa ndi zipangizo zomwe zimayikidwa pamalo opangira. Makulidwe a zigawozo amathanso kusiyanasiyana kuti apereke makulidwe osiyanasiyana omalizidwa (nthawi zambiri, 15 cm (5.9 mu) wosanjikiza amatulutsa makulidwe a 15 mm (0.59 mu). Makataniwo amaikidwa mu makina osindikizira otentha kuti akanikizire mapepalawo ndi kuwamanga poyambitsa kutentha ndi kuchiritsa utomoni womwe wakutidwa pamasamba. Kenako mapanelo aliyense amadulidwa kuchokera pamphasa mpaka kukula komaliza. Ma OSB ambiri padziko lapansi amapangidwa m'malo akuluakulu opanga zinthu ku United States ndi Canada.

Zogwirizana nazo

Zida zina kupatula nkhuni zakhala zikugwiritsidwa ntchito popanga zinthu zofanana ndi OSB. The Oriented structure udzu board ndi engineering board yomwe imapangidwa pogawa udzu, ndikuwonjezera zomatira za P-MDI, ndikuwotcha kukanikizira udzu kumbali ina. Particleboard imathanso kupangidwa kuchokera ku bagasse.

#OSB #OSB3 #PB #particleboard