Iplastiki isetyenziswa kakhulu kumashishini ahlukeneyo ngenxa yokuguquguquka kwayo kunye nexabiso layo eliphantsi. Nangona kunjalo, ingxaki eqhelekileyo ngeplastiki kukuba idla ngokuba tyheli okanye itshintshe umbala ngokuhamba kwexesha ngenxa yokukhanya nobushushu. Ukusombulula le ngxaki, abavelisi badla ngokongeza izongezo ezibizwa ngokuba zi-optical brighteners kwiimveliso zeplastiki ukuze ziphucule inkangeleko yazo.

Kwaziwa njengeizikhanyisi ze-optical, izikhanyisi ze-optical ziikhompawundi ezifunxa ukukhanya kwe-ultraviolet kwaye zikhuphe ukukhanya okuluhlaza okwesibhakabhaka, zinceda ekufihleni ukutyheli okanye ukutshintsha kombala kwiiplastiki. Ezi arhente zokwenza mhlophe zisebenza ngokuguqula imisebe ye-UV engabonakaliyo ibe kukukhanya okuluhlaza okwesibhakabhaka okubonakalayo, okwenza iplastiki ibonakale imhlophe kwaye ikhanya ngakumbi emehlweni omntu.

Esinye sezona zinto zikhanyisa ukukhanya ezisetyenziswa kakhulu kwiiplastiki yi-organic compound ebizwa ngokuba yi-triazine-stilbene derivative. Le compound isebenza kakuhle ekutsaleni imisebe ye-UV nasekukhupheni ukukhanya okuluhlaza okwesibhakabhaka, nto leyo eyenza ukuba ibe yeyona ifanelekileyo ekuphuculeni inkangeleko yeplastiki.

Iplastikiizikhanyisi ze-opticalziza ngeendlela ezininzi, kuquka iipowders, ulwelo kunye nee-masterbatches, ezingamaqhekeza axineneyo asasazwa kwi-carrier resin. Ezi ntlobo zahlukeneyo zinokufakwa lula kwinkqubo yokwenziwa kweplastiki, ukuqinisekisa ukuba i-brightener isasazwa ngokulinganayo kuyo yonke imveliso egqityiweyo.

Ukongeza ekuphuculeni inkangeleko ebonakalayo yeplastiki, izikhanyisi ze-optical zibonelela ngezinye izibonelelo, ezinje ngokubonelela ngokhuseleko lwe-UV kunye nokuphucula ukusebenza kwayo yonke into. Ngokufunxa imisebe ye-UV eyingozi, izikhanyisi zinceda ukwandisa ubomi beplastiki ngokuthintela ukubola kunye nokutyheli okubangelwa kukuvezwa yi-UV.

Ukwengeza,izikhanyisi ze-opticalingadityaniswa nezinye izongezo, ezifana neziqinisi ze-UV kunye nee-antioxidants, ukwenza iimveliso zeplastiki ezikwaziyo ukumelana neemeko zokusingqongileyo kwaye zigcine ukubonakala kwazo ngokuhamba kwexesha.

Xa zisetyenziswa ngokuchanekileyo, izikhanyisi zeplastiki ezikhanyayo zinokuwuphucula kakhulu umgangatho kunye nexabiso leemveliso zeplastiki kumashishini amaninzi kuquka ukupakisha, iimpahla zabathengi, iimoto kunye nokwakha. Ngokufaka ezi zongezo kwimixube yabo yeplastiki, abavelisi banokuqinisekisa ukuba iimveliso zabo zihlala zibukeka kwaye zihlala ixesha elide nangona bechaphazeleka ixesha elide kukukhanya nakwiimeko zokusingqongileyo.

Kubalulekile ukuqaphela, nangona kunjalo, ukuba ukhetho kunye nokugxilaizikhanyisi ze-opticalkufuneka ilinganiswe ngononophelo ukuze kufezekiswe isiphumo esifunekayo ngaphandle kokuchaphazela kakubi ukusebenza okanye iimpawu zeplastiki. Ukusetyenziswa kakhulu kwe-whitener kunokubangela inkangeleko ebluu kakhulu okanye engaqhelekanga, ngelixa ukusetyenziswa okungaphantsi kusenokungasebenzi ekufihleni umbala omdaka.

Ngamafutshane, izikhanyisi ze-optical zidlala indima ebalulekileyo ekuphuculeni inkangeleko nokusebenza kweplastiki. Njengoko imfuno yeemveliso zeplastiki ezikumgangatho ophezulu nezibukekayo iqhubeka ikhula, ukusetyenziswa kweizikhanyisi ze-opticalkulindeleke ukuba ikhule, nto leyo eqhuba ubuchule kunye nophuhliso kwicandelo lezongezo zeplastiki. Ngokusebenzisa iingenelo zezi zinto, abavelisi banokwenza iiplastiki ezingabukeki zingcono kuphela, kodwa ezihlala ixesha elide kwaye ezihlala ixesha elide.