Isivimbeli sethusi noma isivimbeli sethusi siyisengezo esisebenzayo esisetshenziswa ezintweni ze-polymer ezifana nepulasitiki nerabha. Umsebenzi waso oyinhloko ukuvimbela umphumela wokuguga wama-ion ethusi noma ethusi ezintweni, ukuvimbela ukuwohloka kwezinto, ukushintsha kombala, noma ukuwohloka kwempahla yemishini okubangelwa ukuthintana nethusi. Kubaluleke kakhulu emikhakheni efana nomsele wensimbi, isheya lekhebula, izinto zokupakisha ze-elekthronikhi, njll.

Ithusi kanye nezinsimbi zalo (njengezintambo) zisetshenziswa kabanzi ekudlulisweni kwamandla, kodwa uma ithusi lithintana ngqo nezinto ezithile ze-polymer (njenge-PVC, i-polyethylene), lingabangela izinkinga ezilandelayo:

Ukushiswa kwe-Catalytic:
I-Cu2+ iyisikhuthazi esinamandla se-oxidation esisheshisa ukuqhekeka kwe-oxidative kwamaketanga e-polymer molecular, ikakhulukazi ezindaweni ezinokushisa okuphezulu nezinomswakama.

Ukugqwala kwe-asidi:
Ezintweni ezifakwe i-halogen njenge-PVC, ithusi lingasabela ne-HCl ebolile ukuze likhiqize i-chloride yethusi (CuCl2), okusheshisa ukubola kwezinto (umphumela wokuzivuselela).

Ukuwohloka kokubukeka:
Ukufuduka kwama-ion ethusi kungabangela ukuthi kuvele amabala aluhlaza noma amnyama (ukugqwala kwethusi) ebusweni bento, okuthinta ukubukeka kwayo.

Indlela yokusebenza kwe-deactivator
Ama-deactivator acindezela imiphumela emibi yethusi ngezindlela ezilandelayo:

Ama-ion ethusi ahlanganisiwe:
Uma kuhlanganiswa ne-Cu2+ yamahhala, kwakheka ama-complexes azinzile ukuvimba umsebenzi wawo wokuvuselela (njengama-benzotriazole compounds).

Ukudlula kobuso bethusi:
Yakha ifilimu evikelayo phezu kobuso bethusi ukuze uvimbele ukukhishwa kwama-ion ethusi (njengezakhi ze-phosphorus eziphilayo).

Izinto ezinciphisa i-asidi:
Ku-PVC, ezinye izinto zokuvala amandla zinganciphisa i-HCl ekhiqizwa ukubola, zinciphise ukugqwala kwethusi (njengezinto zokuqinisa usawoti we-lead ezinomsebenzi wokumelana nethusi).

Izicima-Copperziwuhlobo lwe-“Invisible Guardian” ezintweni ze-polymer ezandisa kakhulu impilo yesevisi yemikhiqizo efana nama-wire sheathe ngokuvimbela umsebenzi we-catalytic wethusi. Ingqikithi yobuchwepheshe bayo ilele ekuqhekekeni kwamakhemikhali okunembile kanye nokungaphazamisi ubuso, ngenkathi kulinganiswa ubungane bemvelo kanye nokusebenza kahle kwezindleko. Ekwakhiweni kwe-wire casing, ifomula yokuhlanganisa yeizikhulisi, into evimbela ilangabikanye nezinye izithasiselo kuyisihluthulelo sokuqinisekisa ukuthembeka kwesikhathi eside kwezinto.