Kuvala kwa Vacuum Kusindikiza kwa Drainage Kuvala
Zithunzi za PVA III
Zakuthupi: Polyethylene mu hydrophilic, Non-poizoni, palibe kukondoweza minofu, palibe chitetezo chamthupi, palibe tcheru pakhungu chomwe ndi chinthu chabwino kwambiri chopangira chomwe chimagwirizana bwino ndi minofu ya bala.
Ubwino wake: Mapangidwe a porous a zinthuzo amapereka ngakhale kupanikizika koipa kwa chilonda chonsecho.Ngalande yolunjika kuchokera kumachubu odziyimira pawokha mpaka pachilonda, itha kugwiritsidwa ntchito ngati chonyamulira.
Mafotokozedwe a PU IV
1. Palibe chifukwa suture kuvala ndi khungu.
2.Palibe chifukwa chogwiritsa ntchito njira zambiri zolumikizira njira zitatu, kuchepetsa kutayikira kwa mpweya ndi plugging chubu.
3.Popanda anamanga-chitoliro, akhoza amangodula chilonda.
4.Zinthu zofewa zimatha kupangidwa mosinthasintha kuti zigwirizane ndi mitundu yosiyanasiyana ya bala, monga chilonda chosatha, etc.
5. Kuthamanga kwapang'onopang'ono kopanda kuwonongeka: -200 ~ 400mmHg kumayambitsa kuwonongeka kwa chilonda pamwamba ndikusiya chipsera chifukwa cha kupanikizika, kuthamanga kawirikawiri pakati pa 60 ~ 125 mmHg kuti akwaniritse kutsekedwa kogwira mtima ndi ntchito ya ngalande.
Siponji ya Pu ndi siponji youma, ndipo zinthu za polyurethane ndizomwe zimatchinjiriza bwino kwambiri padziko lonse lapansi.Amadziwika kuti "pulasitiki wamkulu wachisanu", amatha kukhala ndi zinthu zosiyanasiyana monga kachulukidwe, kukhazikika komanso kusasunthika posintha mawonekedwe;Kugwiritsa ntchito pachilonda;Ili ndi maubwino pakuwongolera exudate, yomwe imawonekera pakutha kwa madzi ambiri, makamaka oyenera ma exudate owopsa komanso mabala omwe ali ndi kachilombo, kulimbikitsa mapangidwe a minofu ya granulation ndikuwonetsetsa kuthamanga kwa kufalikira kwa yunifolomu.
Zithunzi za PVA V
1.Zosavuta kugwiritsa ntchito: ikani chovala pabala, kuphimba ndi bio-semi permeability filimu ndi kusindikiza bala, kulumikiza ngalande chubu ndi zolumikizira pa kuvala.
2.Otetezeka komanso Odalirika: mapangidwe apadera a zolumikizira pazovala amatha kupewa kutayikira komanso kumasula chubu la ngalande.
Biological micro-porous film
1. Tsukani chilonda ndi zikopa zozungulira.
2.Sankhani thovu la kukula koyenera malinga ndi ma exudates ndi minofu yakufa ya bala, kapena mutha kuyidula mu kukula koyenera.
3. Kufalitsa kuvala mosabisa pa bala, tcherani khutu kudzaza ming'alu.
4. Tsekani chilondacho ndi biological micro-porous film.
5.Lumikizani chubu la ngalande, chubu chowonjezera cha ngalande ndi aspirator, sinthani kupanikizika koyipa molingana ndi kukula ndi mtundu wa bala.