Polyvinyl barasa

Polyvinyl barasa ne roba polymer wanda shi ne sauƙin narkewa a cikin ruwa. Yana da aka samu a 1924 da biyu chemists - Gonelem da kuma Jamus - tare da taimakon da saponification dauki.

jiki Properties

Polyvinyl barasa - wani farin foda, da ciwon da ikon samar da wani fim. Wannan polymer ne mai karfi da kuma m, amma tun da wadannan dogara a kan ingancin danshi (da shi garwaya da ruwa), da tensile ƙarfin rage-rage, da kuma babban ductility faruwa a lokacin da wasu mataki na zafi. Yana yana da hygroscopic Properties, shi ne sauƙin narkar (yafi ruwa). A kwayoyin kaushi kamar fats da kuma mai, shi ne ba su iya soke. Lokacin amfani da wannan abu yana ba mai guba effects, sabili da haka za a iya daukan m.

da samun barasa

Polyvinyl barasa ko PVA da aka shirya daga polyvinyl acetate da hydrolysis ko alcoholysis da kuma samar a cikin nau'i na granules ko foda. wani iri-iri fasaha hanyoyin, daga sauki ga quite hadaddun da kuma lokaci-cinyewa amfani a cikin shirye-shiryen da PVA.

Polyvinyl barasa - da yin amfani da

PVA yanzu amfani yadu. Ya iya wasa da muhimmancin thickener tare da manne yi da kuma shampoos, shi iya nuna wani latex abu. Yana da aka samu nasarar yi amfani da mayar da restorers na zane-zane. Saboda ta hygroscopic Properties, shi ne yadu amfani a cikin halittar hygienic wajen. Duk wani nau'i na diapers, tampons da gammaye an yi amfani da PVA. Kada ka manta da polyvinyl barasa, da kuma abinci masu kera. Ana amfani da a matsayin emulsifier a samar da mayonnaise, a biredi, ketchups da sauran kayayyakin abinci, da kuma kuma an yi amfani da matsayin da dandano enhancer confectionery.

Modern magani, ma, ya soma da wasu daga cikin kaddarorin da PVA. Ana amfani da a yi na wasu magunguna, kafin biyayya da shi sosai tsabtace daga impurities. Ophthalmologists polyvinyl barasa amfani da shiri na ido saukad da kuma matsayin man shafawa na lamba ruwan tabarau. Ko oncologists sun samu aikace-aikace da magani daga PVA ciwon daji. A musamman, shi ake bukata don yin ba-m embolization hanya. Kuma shi ba dukan kewayon aikace-aikace na polyvinyl barasa a magani.

A cikin yadi masana'antu PVA da ake amfani domin kau da rikicewar lantarki, da kuma takarda - for takarda sake amfani. Bugu da ƙari, shi ne wani ba makawa bangaren na ɓangaren litattafan almara niƙa. Polyvinyl barasa ne da ake bukata magina da metallurgists, tanners da masana'antun na Paints da varnishes. All shuke-shuke samar da wucin gadi zaruruwa aka yi amfani da sarrafa PVA, wanda ya ba su da karfin da wani tsari na sizing zaruruwa.

Har irin wannan kimiyya na ilimin ya yi amfani da PVA a immobilization na enzymes kuma Kwayoyin. Polyvinyl barasa da kuma samo aikace-aikace a bugu, musamman allon bugu. A wannan filin da aka yi amfani a matsayin polymer Layer ga kwashe tsari. Ana iya amfani da kuma matsayin marufi ko m abu a samar da shafi gyara saboda gaskiyar cewa a Layer na PVA aka sauƙi cire.

Masana'antu da ake ji kuma mold ana amfani da nasara, wannan polymer. PVA yanzu zama more kowa a cikin tattalin arzikin kasar. Akwai shi a farashin da cewa mai sauki ne ga kai (yawanci a cikin roba bags, cushe a takarda bags) a cikin rufaffiyar kai domin kauce wa samun rigar. Tun da polyvinyl barasa ne flammable, shi wajibi ne don cika da aminci dokokin a lokacin ajiya da kuma handling.