Nrog rau qhov kev txo nrawm ntawm cov hav zoov thoob ntiaj teb thiab kev siv ntawm Tuam Tshoj' s ntuj hav zoov kev tiv thaiv phiaj xwm, cov ntoo me me yuav tsum muaj cov nplaum ua kom sib zog thiab ua tau ntev thiab huab cua tiv thaiv zoo dua li ntoo nws tus kheej. Tus nqi ntawm cov nplaum tau dhau los ua qhov kev ntsuas ntawm qib theem ntawm kev txhim kho ntawm ntoo kev lag luam. Sij hawm dhau los, cov nplaum ua ntoo siv los ntawm cov neeg feem ntau urea-formaldehyde resins, phenolic resins thiab melamine-formaldehyde resins nrog formaldehyde yog cov khoom tseem ceeb. Txawm li cas los xij, vim muaj kev tsim tawm ntawm cov formaldehyde dawb, cov khoom lag luam yuav maj mam tawm cov roj av formaldehyde rau cov chaw nyob ib puag ncig thaum siv, ua rau muaj kuab paug rau ib puag ncig. Kev lag luam ua kev lag luam ntoo tau pib tsom rau ib yam tshiab ntawm kev tiv thaiv ib puag ncig cov tshuaj pleev nplaum polyurethane kua nplaum, txhawm rau txo qis kev ua qias tuaj ib puag ncig. Qhov ib-ntu ya raws-kho polyurethane nplaum siv nyob rau hauv kev lag luam woodworking yog kua thiab siv nyob rau hauv chav tsev kub. Feem ntau, nws muaj lub zog sib tsoo muaj zog, yooj ywm thiab dej tsis kam, thiab tuaj yeem sib txuam nrog ntau cov ntoo tsis muaj ntoo (xws li textile fibers, hlau, plastics, roj hmab, thiab lwm yam). Lub zog qhuav thiab ntub dej ntawm cov tshuaj tivthaiv ib-polyurethane nplaum nyob rau hauv kev xeem zoo dua li cov nplaum phenolic nplaum. Ua ntej daim ntawv cog lus, thov siv cov hydroxymethyl resorcinol (HMR) tus neeg sawv cev txuas rau saum npoo ntawm txoj hlua khi khi txhawm rau txhawm rau txhim kho lub zog khi. HMR tuaj yeem ntxiv dag zog rau txoj kev sib khi ntawm txhua qhov thermosetting ntoo nplaum. Thaum cov ntoo saum npoo yog pre-coated nrog HMR txuas tus neeg sawv cev, lub zog thiab kev ua tau ntev ntawm cov ntaub ntawv tivthaiv ib-polyurethane nplaum tuaj yeem ua tau raws li feem ntau ntawm qhov ntsuas nruj uas yuav tsum tau ua.
