Izikhwama zokupakisha zama-napkin asekhaya ngokuvamile zenziwe nge-polyethylene ephansi (LDPE) noma i-copolymer polypropylene (CPP), ezinikeza ukuthungwa okuthambile, okungacwebezeli kahle okunokumelana nomswakama kanye nokumelana nokudabuka ukuze kuvikelwe ama-napkin emswakama.

Ukumaka kokushintsha kombala nge-laser ye-UV kusetshenziswa ungqimba lwangaphandle, kushintsha isakhiwo sama-molecule esimbozo ukuze kudalwe izimpawu zosuku lokukhiqiza ezicacile. Le ndlela engadingi ukusetshenziswa iqinisekisa izimpawu ezingagugi, ezingashiyi umbala ezihlala zifundeka ngokuhamba kwesikhathi.

Ukumaka kwe-laser ye-UV embozweni wangaphandle we-PET wezikhwama zokupakisha ze-PET/AL/PE ezihlanganisiwe kusebenzisa imisebe ye-laser enamandla aphezulu ukuqala ukusabela kwe-photochemical kanye nemiphumela emincane yokushisa. Uma isetshenziswa embozweni omhlophe, i-laser ishintsha isakhiwo sama-molecule, iguqule ubuso bube mpunga esikhundleni sokumane isuse ungqimba.

Lesi simiso sokushintsha umbala siqinisekisa izimpawu ezicacile nezihlala isikhathi eside, ezivame ukusetshenziswa ekuphrinteni izinsuku zokukhiqiza kanye nezinombolo zebhetshi. Izimpawu zihlala zingagugi futhi zingashiyi, zihlala zifundeka ngisho nangaphansi kokusetshenziswa isikhathi eside noma izimo zemvelo ezinzima.

Ukupakishwa kwephedi lokuhlanzeka kuvame ukwenziwa ngefilimu ehlanganisiwe ye-polyethylene (PE)/polypropylene (PP), okunikeza ukuguquguquka okuhle kakhulu kokunwebeka nokuvala. Njengoba inesimo esithambile futhi inomuzwa okhululekile, inikeza umswakama ophakeme kanye nokumelana nothuli, ivikela ngempumelelo umkhiqizo ngenkathi igcina amandla okupakisha.

Le filimu ehlanganisiwe isekela ukumakwa kwe-laser ye-UV, lapho i-laser ibangela ukusabela kwe-photochemical embozweni, ishintsha umbala wayo ukuze idale amamaki ampunga ebusweni obumhlophe bezinsuku zokukhiqiza kanye nezinombolo ze-batch. Le ndlela iqinisekisa amamaki acacile, aqinile ahlala engaphelelwa yisikhathi ngisho nangesikhathi sokugcina nokuthuthwa isikhathi eside.

Izikhwama zokupakisha ukudla ezinobuso obubushelelezi obumhlophe njengesiliva, ezenziwe nge-aluminium foil (AL) kanye ne-PET composite, zivame ukusetshenziselwa ukupakisha ukudla okunezithiyo eziphakeme. Lezi zikhwama zinokukhanya kwensimbi okunokwakheka okungabonakali, okunikeza umswakama omuhle kakhulu, ukugqwala, kanye nokumelana nokukhanya, okuqinisekisa ukuthi ukudla kuhlala kusha futhi kuqinile ngesikhathi sokuthuthwa nokugcinwa.

Ngokuvamile kusetshenziselwa ubhontshisi wekhofi, itiye, amantongomane, izinongo, kanye nokudla okulula okulungiselelwe ukudliwa, lezi zikhwama zigcina ukudla kusha futhi kunuka kahle. Ukumaka nge-laser yefayibha kususa uqweqwe olungaphezulu, kwembule umbala ojulile ongaphansi ukuze kudalwe usuku lokukhiqiza olucacile noluhlala isikhathi eside kanye nokumaka kwenombolo yebhetshi okumelana nokuguguleka nokushabalala.

Izikhwama zokupakisha ama-noodle zivame ukwenziwa ngezinto ezihlanganisiwe ze-BOPP/PE (polypropylene/polyethylene eziqondiswe kabili). Ingqimba yangaphandle ye-BOPP inikeza ukucaca okuphezulu kanye nokuphrinta okuhle kakhulu, okuvumela ukubonakala kwama-noodle ngenkathi inikeza ukumelana nomswakama ukuze kube kusha. Ingqimba yangaphakathi ye-PE ithambile, ayinabo ubuthi, futhi iphephile ekudleni, inezakhiwo eziqinile zokuvala ukushisa ukuqinisekisa ukuvalwa okuphephile, okumelana nomswakama.

Indawo embozwe ngombala omhlophe ebusweni be-BOPP yenzelwe ukumaka i-UV laser. Kusetshenziswa isimiso sokushintsha umbala we-laser, umbala wengubo uyashintshwa ukuze kuphrintwe izinsuku zokukhiqiza ezicacile kanye nezinombolo ze-batch ngaphandle kokubhoboza iphakheji. Izimpawu eziqinile, ezingagugi ziqinisekisa ukuphepha komkhiqizo ngesikhathi sokuthuthwa nokugcinwa.

Ubuchwepheshe bokumaka nge-laser ye-UV busetshenziswa kulebula ye-PET yokugoqa amabhodlela okuhlanza ubuso obuyindilinga, ukuqinisekisa ukuthi izimpawu zosuku lokukhiqiza zicacile ezindaweni ezigobile. I-laser isebenza ngendlela yokushintsha umbala, lapho imisebe enamandla aphezulu ibangela ukusabela kwe-photochemical, ishintsha isakhiwo sama-molecule ebusweni be-PET ukuze kudalwe izimpawu ezimpunga-ezimhlophe noma ezimnyama ngaphandle kokususwa kwezinto.

Le ndlela ilungele izindawo ezigobile, ezithinta ukushisa okuphansi ukuvimbela ukulimala noma ukuguquka kwendawo.

Amasachethi amancane ejusi elihlanganisiwe ngokuvamile enziwa ngezinto ezihlanganisiwe ze-PET/AL/PE. Isendlalelo se-PET sangaphandle sihlala isikhathi eside futhi asigugi, isendlalelo se-aluminium foil (AL) sivimba ukukhanya, umoya-mpilo, kanye nomswakama, kuyilapho isendlalelo se-PE sangaphakathi siqinisekisa ukuphepha kokudla kanye nokuvalwa.

Ukuze kuphawulwe izinsuku zokukhiqiza kanye nezinombolo ze-batch, kuphawulwa nge-laser ye-UV kusetshenziswa ungqimba lwangaphandle lwe-PET. I-laser ibangela ukusabela kwe-photochemical okushintsha isakhiwo sama-molecule ebusweni be-PET, idale izimpawu ezimpunga noma ezimnyama ngaphandle kokubhoboza iphakheji. Le ndlela iqinisekisa izimpawu ezicacile, ezingagugi ngenkathi igcina ubuqotho be-aluminium foil kanye nezendlalelo ze-PE, ivimbela ukuvuza kwejusi.