Amafilimu ophahla

ulwelwesi ophahleni

I-vapour permeability ye-roofing membranes ihlolwa ngezindlela ezihlukahlukene ngaphansi kwezimo ezithile zaselabhorethri ezifana nezinga lokushisa, ingcindezi kanye nomswakama womoya. Kunzima ukuthola izimo ezifanayo ezifundweni ezinjalo, ngakho amanani anikezwe ngale ndlela awathembekile ngokuphelele. Ukungena komhwamuko kuvame ukunikezwa ngamayunithi angu-g/m2/ngosuku, okusho inani lomhwamuko wamagremu ozodlula kumitha yesikwele yefoyili ngosuku. Inkomba enembe kakhudlwana yokungena komhwamuko wefoyili yi-coefficient yokumelana nokusabalalisa i-Sd, evezwe ngamamitha (imele ukujiya okulingana nokusabalaliswa kwegebe lomoya). Uma i-Sd = 0,02 m, lokhu kusho ukuthi impahla idala ukumelana nomhwamuko wamanzi owenziwe ungqimba lomoya owugqinsi ongu-2 cm. I-vapor permeability? lena inani lomhwamuko wamanzi ifilimu yokuphahla (uboya, i-membrane) ikwazi ukudlula ngaphansi kwezimo ezithile. Ingabe umthamo wamanzi othwala amanzi uphezulu ngendlela eyodwa (awunaki kwenye)? ngakho-ke kubaluleke kakhulu ukubeka i-foil ophahleni ngohlangothi lwesokudla, kaningi ngemibhalo ebhaliwe phezulu, ukuze umhwamuko wamanzi ungene usuka ngaphakathi uya ngaphandle. Ifilimu yokufulela ibizwa nangokuthi ifilimu engaphansi ngenxa yokuthi ingathatha indawo yesigqoko esinamekwe ngephepha letiyela lendabuko. Zenzelwe ukuvikela isakhiwo sophahla kanye nesendlalelo sokuvikela emvuleni naseqhweni eliwela ngaphansi kwesembozo. Kuphinde kucatshangwe ukuthi ukushisa ngeke kukhishwe ungqimba wokushisa okushisa, ngakho-ke kufanele futhi kuvikeleke emoyeni. Futhi ekugcineni? ukukhipha umswakama owedlulele ongangena ezingqimbeni zophahla kusuka ngaphakathi kwendlu (kulokhu, kufanele uqhubeke njalo ngokucabangela ukuthi umhwamuko wamanzi uzongena kulezi zingqimba ngenxa yokuvuza okuhlukahlukene). Umsebenzi wokugcina we-foil? ukungena kwayo? kubonakala kuyisimo esibaluleke kakhulu lapho ukhetha uhlobo lwefilimu yokuphahla kusuka kubakhiqizi abahlukahlukene. Ifilimu ithathwa ngokuthi umhwamuko onamandla ukwazi ukungena ku-Sd <0,04 m (okulingana nokungaphezu kuka-1000 g/m2/24h ku-23°C kanye no-85% womswakama ohlobene). Uma i-coefficient ye-Sd incane, kulapho umhwamuko ogcwala khona ifilimu. Ngokuvumelana ne-vapor permeability, amaqembu amafilimu ane-vapor permeability ephansi, ephakathi nendawo ephezulu ayahlukaniswa. ngaphansi kuka-100 g/m2/24 h? umhwamuko ophansi okwazi ukungena, kuze kufike ku-1000 g/m2/24h – umhwamuko ophakathi nendawo; i-Sd coefficient ingu-2-4 m; lapho uzisebenzisa, kuyadingeka ukugcina igebe lokungenisa umoya lika-3-4 cm ngaphezu kokufakwa ukuvimbela umswakama ukuthi ungangeni. Amafilimu ane-vapor permeability ephezulu angabekwa ngqo kumapulangwe futhi ahlangane nesendlalelo se-insulating. Isisindo nokumelana nolwelwesi olufulelayo emisebeni ye-ultraviolet kuthinta ukuqina kwento. Uma i-foil ishubile, imelana kakhulu nokulimala kwemishini kanye nemiphumela elimazayo yemisebe yelanga (kuhlanganise ne-ultraviolet? UV). Amafilimu asetshenziswa kakhulu yi-100, 115 g/m2 ngenxa yesilinganiso esifanele sesisindo namandla emishini kanye nokungena komhwamuko. Amafilimu ane-vapor permeability ephezulu amelana nemisebe ye-UV izinyanga ezi-3-5 (nokuphefumula okuphansi kwamaviki angu-3-4). Ukumelana okunjalo okwandayo kufinyelelwa ngenxa ye-stabilizers - izithasiselo zezinto. Zengezwa ukuze kuvikelwe amafilimu emisebeni engena ngezikhala (noma izimbobo) enamathela ngesikhathi sokusebenza. Izengezo ezinciphisa imiphumela eyingozi yemisebe yelanga kufanele zinikeze iminyaka eminingi yokusetshenziswa kwezinto, futhi zingaphoqeleli osonkontileka ukuthi baphathe ifilimu yokufulela njengophahla lwesikhashana izinyanga ezimbalwa. Isilinganiso sokumelana kwamanzi kwe-foil ukumelana kwezinto ezibonakalayo ekucindezelweni kwekholomu yamanzi. Kumelwe okungenani ibe ngu-1500 mm H20 (ngokuvumelana ne-DIN 20811 ejwayelekile yaseJalimane; e-Poland, ukumelana kwamanzi akuvivinywa ngokwanoma iyiphi indinganiso) kanye no-4500 mm H20 (ngokuvumelana nalokho okubizwa ngokuthi. indlela ye-kinetic). Ingabe ukukhanya kwangaphambi kwekhava kwenziwa ngepulasitiki? eyenziwe nge-polyethylene (eqinile futhi ethambile), i-polypropylene, i-polyester ne-polyurethane, ngakho-ke inamandla futhi imelana nokuguqulwa. Amafilimu aqinisiwe anezendlalelo ezintathu avame ukusetshenziswa, anesendlalelo esiqinisayo se-mesh eyenziwe nge-polyethylene eqinile, i-polypropylene noma i-fiberglass phakathi kwe-polyethylene. Ngenxa yalesi sakhiwo, azikho ngaphansi kokuguqulwa ngesikhathi sokusebenza futhi ngenxa yokuguga kwezinto. Amafilimu ane-anti-condensation layer ane-viscose-cellulose fiber phakathi kwezingqimba ezimbili ze-polyethylene, edonsa umhwamuko wamanzi owedlulele futhi iwukhiphe kancane kancane. Lawa mafilimu akamuva anomoya omncane kakhulu wokungena umhwamuko. Ama-membrane ophahla (izinto ezingalukiwe) nazo zinesakhiwo esinezingqimba. Ungqimba oluyinhloko i-polypropylene engalukiwe embozwe nge-polyethylene noma i-microporous polypropylene membrane, ngezinye izikhathi iqiniswa nge-polyethylene mesh.