Hordhaca Xabagta Kulul ee EVA

Xabagta kulul ee EVA waa dareere -free, biyo{1}}free, 100% adag, polymer fusible. Way ku adag tahay heerkulka qolka waxayna ku dhalaali kartaa koollada dareeraha ah ee qulqulaya marka la kululeeyo ilaa xad. Ka dib dhalaalidda, waa bunni khafiif ah, dhalaalsan ama dami- walax cad. Qaybta ugu muhiimsan ee xabagta dhalaalka kulul, xabagta aasaasiga ah, waa copolymer ee ethylene iyo vinyl acetate ee cadaadiska sare, oo ay weheliso tackifiers, wax ka beddelayaasha viscosity, antioxidants, iwm, si ay u abuuraan dhalaalka kulul.

EVA waa walxo caag ah oo ka kooban ethylene (E) iyo vinyl acetate (VA). Saamiga labadan kiimiko waa la hagaajin karaa si loo daboolo baahiyaha kala duwan ee codsiga. Mawduuca sare ee vinyl acetate (Va content) wuxuu keenaa hufnaan, jilicsanaan, iyo adkaansho.

Ethylene - vinyl acetate copolymer (sidoo kale loo yaqaano ethylene{1}} vinyl acetate copolymer) waxa lagu helaa kobolymerizing ethylene (E) iyo vinyl acetate (VA). Magaceeda Ingiriisiga ah waa Ethylene Viny Acetate, oo loo soo gaabiyo EVA ama E/VAC. Hababka polimerization-ka waxa ka mid ah-pomerization bulk cadaadis sare (oo balaastikada ah), polymerization xal (kaaliyaha farsamaynta PVC), polymerization emulsion (xabagta), iyo polymerization hakinta. Polymerization Emulsion waxa loo isticmaalaa maaddada vinyl acetate (VA) oo ka sarraysa 30%, halka sare -polymerization bulk loo isticmaalo ka kooban VA hoose. EVA waxay leedahay codsiyo kala duwan oo kala duwan.

Guud ahaan, EVA oo leh maadada vinyl acetate ee ka hooseeya 5% ayaa inta badan loo isticmaalaa filimada, wax ka beddelka LDPE ee fiilooyinka iyo fiilooyinka, iyo xabagta; EVA oo leh maadada vinyl acetate ee 5% -10% ayaa loo isticmaalaa filimada laastikada; EVA oo leh maadada vinyl acetate ee 20% -28% ayaa inta badan loo isticmaalaa xabagta dhalaalaysa ee kulul iyo alaabta daahan; iyo EVA oo leh maadada vinyl acetate oo ah 5%-45% waxaa inta badan loo isticmaalaa filimada (ay ku jiraan filimada beeraha) iyo go'yaal, duritaan la isku duray oo la shubay, badeecooyin xumbo leh, iyo xabag kulul oo dhalaalaysa. Waxaa si weyn loogu isticmaalaa alaabta kabaha xumbo-xumeeysa, filimada aqalka dhirta lagu koriyo ee shaqeynaya, caaryada baakadaha, xabagta dhalaalaysa ee kulul, fiilooyinka iyo fiilooyinka, iyo alaabta lagu ciyaaro.