Matumba opakira ma napuleti apakhomo nthawi zambiri amapangidwa ndi polyethylene yotsika kwambiri (LDPE) kapena copolymer polypropylene (CPP), zomwe zimawapatsa mawonekedwe ofewa, osawoneka bwino komanso osanyowa komanso osang'ambika kuti ateteze ma napuleti ku chinyezi.

Chizindikiro chosintha mtundu cha laser ya UV chimagwiritsidwa ntchito pa gawo lakunja, kusintha kapangidwe ka molekyulu ya chophimbacho kuti apange zizindikiro zomveka bwino za masiku opangira. Njira iyi yopanda kugwiritsa ntchito imatsimikizira kuti zizindikirozo sizitha kuwonongeka, zomwe sizitha kutha zomwe zimakhalabe zowerengeka pakapita nthawi.

Chizindikiro cha laser ya UV pa PET yakunja ya matumba ophatikizira a PET/AL/PE chimagwiritsa ntchito kuwala kwa laser yamphamvu kwambiri kuti ichititse kusintha kwa photochemical ndi zotsatira zochepa za kutentha. Ikagwiritsidwa ntchito pa white sheet, laser imasintha kapangidwe ka molekyulu, ndikusandutsa pamwamba kukhala imvi m'malo mongochotsa wosanjikizawo.

Mfundo yosintha mitundu iyi imatsimikizira kuti zilembo zooneka bwino komanso zolimba, zomwe zimagwiritsidwa ntchito kwambiri posindikiza masiku opangira ndi manambala a batch. Zizindikirozo zimakhalabe zolimba komanso zosatha, ndipo zimakhala zowerengeka ngakhale zitagwiritsidwa ntchito kwa nthawi yayitali kapena m'malo ovuta.

Mapepala ophikira ukhondo nthawi zambiri amapangidwa ndi filimu ya polyethylene (PE)/polypropylene (PP), yomwe imapereka kusinthasintha kwabwino kwambiri pakutambasula ndi kutseka. Ndi mawonekedwe osawoneka bwino komanso kumva bwino, imapereka chinyezi komanso kukana fumbi, kuteteza bwino chinthucho komanso kusunga mphamvu ya maphukusi.

Filimu yophatikizika iyi imathandizira chizindikiro cha UV laser, pomwe laser imayambitsa kusintha kwa photochemical mu chophimbacho, kusintha mtundu wake kuti apange zizindikiro za imvi pamwamba poyera kuti zigwirizane ndi masiku opangira ndi manambala a batch. Njirayi imatsimikizira zizindikiro zomveka bwino komanso zolimba zomwe zimakhalabe zolimba ngakhale pakusungidwa ndi kunyamulidwa kwa nthawi yayitali.

Matumba ophikira chakudya okhala ndi pamwamba poyera ngati siliva, opangidwa ndi zojambulazo za aluminiyamu (AL) ndi PET composite, amagwiritsidwa ntchito kwambiri pophikira chakudya chopanda zingwe zambiri. Matumba awa ali ndi kuwala kwachitsulo komanso mawonekedwe osawoneka bwino, omwe amapereka chinyezi chabwino, okosijeni, komanso kukana kuwala, zomwe zimapangitsa kuti chakudya chikhale chatsopano komanso cholimba panthawi yonyamula ndi kusungira.

Kawirikawiri amagwiritsidwa ntchito pa nyemba za khofi, tiyi, mtedza, zonunkhira, ndi zokhwasula-khwasula zokonzeka kudyedwa, matumba awa amasunga chakudya kukhala chatsopano komanso chonunkhira bwino. Kulemba kwa laser ya ulusi kumachotsa chophimba pamwamba, ndikuwulula mtundu wozama kwambiri kuti apange masiku omveka bwino komanso olimba opangira komanso zizindikiro za nambala ya batch zomwe zimaletsa kuwonongeka ndi kutha.

Matumba osungiramo Zakudya za Noodle nthawi zambiri amapangidwa ndi zinthu zopangidwa ndi BOPP/PE (polypropylene/polyethylene) zomwe zimakhala ndi mawonekedwe ofanana. Gawo lakunja la BOPP limapereka mawonekedwe owonekera bwino komanso kusindikizidwa bwino, zomwe zimathandiza kuti Zakudya za Noodle ziwonekere bwino komanso zimapereka kukana chinyezi kuti zikhale zatsopano. Gawo lamkati la PE ndi lofewa, lopanda poizoni, komanso lotetezeka ku chakudya, ndipo limakhala ndi mphamvu zotsekera kutentha kuti zitsimikizire kuti chisindikizocho chili chotetezeka komanso chopanda chinyezi.

Malo opaka utoto woyera pamwamba pa BOPP amapangidwa kuti azilemba chizindikiro cha UV laser. Pogwiritsa ntchito mfundo yosinthira mtundu wa laser, mtundu wa utotowo umasinthidwa kuti usindikize masiku omveka bwino opangira ndi manambala a batch popanda kuboola phukusi. Zizindikiro zolimba komanso zosatha kutha zimatsimikizira chitetezo cha chinthucho panthawi yonyamula ndi kusungira.

Ukadaulo wolembera chizindikiro cha laser ya UV umagwiritsidwa ntchito pa chizindikiro cha PET chozungulira mabotolo oyeretsera nkhope ozungulira, kuonetsetsa kuti zizindikiro za tsiku lopangidwa zili bwino pamalo opindika. Laser imagwira ntchito kudzera mu njira yosinthira mtundu, pomwe kuwala kwamphamvu kwambiri kumayambitsa kusintha kwa photochemical, kusintha kapangidwe ka molekyulu ya pamwamba pa PET kuti apange zizindikiro zoyera kapena zakuda popanda kuchotsa zinthu.

Njira iyi ndi yabwino kwambiri pa malo opindika, okhala ndi kutentha kochepa kuti apewe kuwonongeka kapena kusinthika kwa pamwamba.

Matumba ang'onoang'ono a madzi okhuthala nthawi zambiri amapangidwa ndi zinthu zopangidwa ndi PET/AL/PE. Gawo lakunja la PET ndi lolimba komanso losawonongeka, gawo la aluminiyamu foil (AL) limatseka kuwala, mpweya, ndi chinyezi, pomwe gawo lamkati la PE limaonetsetsa kuti chakudya chili bwino komanso chotsekedwa.

Kuti mulembe masiku opangidwa ndi manambala a batch, chizindikiro cha UV laser chimagwiritsidwa ntchito pa PET external layer. Laser imayambitsa photochemical reaction yomwe imasintha kapangidwe ka mamolekyu a pamwamba pa PET, ndikupanga zizindikiro za imvi kapena zakuda popanda kuboola phukusi. Njirayi imatsimikizira kuti zizindikirozo ndi zomveka bwino, zosatha kutha pamene ikusunga umphumphu wa zojambulazo za aluminiyamu ndi zigawo za PE, kuteteza kutuluka kwa madzi.