Filimu yapulasitiki ngati chinthu chosindikizira, imasindikizidwa ngati thumba lachikwama, chowala komanso chowonekera, kukana chinyezi ndi kukana kwa okosijeni, kulimba kwa mpweya wabwino, kulimba ndi kupindika kukana, kutsekemera pamwamba, kungateteze mankhwala, ndipo kungathe kubereka mawonekedwe a mankhwala, mtundu ndi ubwino zina. Ndi chitukuko cha mafakitale a petrochemical, mitundu yambiri ya filimu ya pulasitiki, yomwe imagwiritsidwa ntchito kwambiri ndi filimu ya polyethylene (PE), polyvinyl chloride (PVC), polystyrene (PS), filimu ya polyester (PET), polypropylene (PP), nayiloni (PA) ndi zina zotero. Kuphatikiza apo, pali mitundu ina yambiri ya filimu ya pulasitiki, wopanga ma CD osinthika a Shunfa akuganiza kuti ndikofunikira kumvetsetsa mawonekedwe a filimu yapulasitiki musanayambe matumba onyamula. Masanjidwe mwapadera mawonekedwe amitundu 11 ya filimu yapulasitiki pansi pa chikwama cholongedza kuti muwonere.
1. Polyvinyl kolorayidi (PVC)
Ubwino wa filimu ya PVC ndi PET ndizofanana, ndipo zomwezo ndizofanana ndi mawonekedwe owonekera, kupuma, asidi ndi kukana kwa alkali. Matumba ambiri oyambirira amapangidwa ndi matumba a PVC. Komabe, PVC ikhoza kumasula ma carcinogens chifukwa cha polymerization yosakwanira ya ma monomers ena popanga zinthu, kotero sizoyenera kudzaza zinthu zamagulu a chakudya, ndipo ambiri asintha kukhala matumba opangira PET, kuyika chizindikiro cha zinthu ndi No.
2. Polystyrene (PS)
Mayamwidwe amadzi a filimu ya PS ndi otsika, koma kukhazikika kwake ndikwabwinoko, ndipo kumatha kukonzedwa ndi kuwombera kufa, kukanikiza kufa, kutulutsa ndi kutulutsa thermoforming. Nthawi zambiri, imagawika m'magulu awiri otulutsa thovu ndi kutulutsa thovu molingana ndi ngati yadutsa mukuchita thovu. PS yopanda thovu imagwiritsidwa ntchito kwambiri pomanga, zoseweretsa, zolembera, ndi zina zambiri, ndipo imathanso kupangidwanso kukhala mitsuko yodzaza ndi mkaka wothira, ndi zina zambiri. ndi 6.
3. Polypropylene (PP)
Kanema wamba wa PP amatengera kuwomba, njira yosavuta komanso yotsika mtengo, koma mawonekedwe owoneka bwino ndi otsika pang'ono kuposa CPP ndi BOPP. Mbali yaikulu ya PP ndi kutentha kwambiri kukana (pafupifupi -20 ° C ~ 120 ° C), ndipo malo osungunuka ndi okwera kwambiri mpaka 167 ° C, omwe ndi oyenera kudzaza mkaka wa soya, mkaka wa mpunga ndi zinthu zina zomwe zimafuna kupha tizilombo toyambitsa matenda. . Kuuma kwake ndikwapamwamba kuposa PE, yomwe imagwiritsidwa ntchito popanga zipewa zazitsulo, ndipo chizindikiro cha zinthu ndi No. pamene PE ili ndi fungo lolemera la kandulo.
4. Filimu ya Polyester (PET)
Filimu ya polyester (PET) ndi pulasitiki yaukadaulo ya thermoplastic. Filimu yopyapyala yopangidwa ndi pepala lochindikala ndi njira ya extrusion komanso kutambasuka kwapawiri. Filimu ya polyester imadziwika ndi makina abwino kwambiri, kulimba kwambiri, kuuma komanso kulimba, kukana kuphulika, kukana kukangana, kukana kutentha kwambiri, kukana kwa mankhwala, kukana kwamafuta, kulimba kwa mpweya ndi kusungirako kununkhira kwabwino, ndi imodzi mwazinthu zomwe zimagwiritsidwa ntchito popanga permeability magawo a kanema, koma kukana kwa corona ndikotsika, mtengo wake ndi wokwera. Makulidwe a filimuyi nthawi zambiri ndi 0.12mm, yomwe imagwiritsidwa ntchito ngati zinthu zakunja za thumba lazonyamula chakudya, ndipo kusindikiza kwake ndikwabwino. Chongani chizindikiro chakuthupi 1 muzinthu zapulasitiki.
5. Nayiloni (PA)
Filimu yapulasitiki ya nayiloni (polyamide PA) pakali pano ikupanga mafakitale amitundu yambiri, yomwe mitundu yayikulu yomwe imagwiritsidwa ntchito popanga filimu ndi nayiloni 6, nayiloni 12, nayiloni 66 ndi zina zotero. Kanema wa nayiloni ndi filimu yolimba kwambiri, yowonekera bwino, komanso yowala bwino. Kulimba mphamvu, kumakoka mphamvu, mkulu ndi otsika kutentha kukana, kukana mafuta, organic zosungunulira kukana, kuvala kukana ndi puncture kukana zabwino kwambiri, ndi filimu ndi ndi zofewa, kwambiri kukana mpweya, koma chotchinga nthunzi wa madzi ndi osauka, mayamwidwe chinyezi, chinyezi permeability ndi lalikulu, ndi kutentha kusindikiza ndi osauka. Zoyenera kulongedza zinthu zolimba, monga chakudya chamafuta, chakudya chokazinga, chakudya choyika vacuum, kuphika chakudya, ndi zina.
6. High Density Polyethylene (HDPE)
Filimu ya HDPE imatchedwa geomembrane kapena filimu yosatha. Malo ake osungunuka ndi pafupifupi 110 ℃-130 ℃, ndipo kachulukidwe kake ndi 0.918-0.965kg/cm3. Ndi crystallinity yapamwamba, utomoni wosakhala wa polar thermoplastic, mawonekedwe a HDPE oyambilira ndi oyera amkaka, m'gawo laling'ono lamlingo wina wowonekera. Imakhala ndi kukana kwabwino kwa kutentha kwakukulu ndi kutsika komanso kukana kwamphamvu, ngakhale pa -40F kutentha kochepa. Kukhazikika kwake kwamankhwala, kukhazikika, kulimba, mphamvu zamakina, mphamvu zamakina ndizabwino kwambiri, ndipo pakuwonjezeka kwa kachulukidwe, zida zamakina, zotchinga, mphamvu zolimba komanso kukana kutentha zidzasinthidwa moyenerera, zimatha kukana asidi, alkali, zosungunulira organic ndi zina. dzimbiri. Chizindikiritso: nthawi zambiri imakhala yosawoneka bwino, imamveka ngati sera, thumba lapulasitiki likupakidwa kapena kupaka pochita zachabechabe.
7. Low Density Polyethylene (LDPE)
LDPE filimu kachulukidwe ndi otsika, zofewa, otsika kutentha kukana, zimakhudza kukana mankhwala bata ndi zabwino, mumikhalidwe yachibadwa asidi (kupatula amphamvu oxidizing asidi), zamchere, dzimbiri mchere, ndi kutchinjiriza wabwino magetsi. LDPE imagwiritsidwa ntchito kwambiri m'matumba apulasitiki, kuyika chizindikiro cha zinthu ndi No. Chizindikiritso: Chikwama cha pulasitiki chopangidwa ndi LDPE ndi chofewa, chosagwedezeka pang'ono pokanda, filimu ya pulasitiki yoyika kunja ndi yofewa komanso yosavuta kung'amba LDPE, ndipo cholimba kwambiri ndi filimu ya PVC kapena PP.
8. Mowa wa Polyvinyl (PVA)
Polyvinyl alcohol (PVA) high barrier composite film ndi filimu yokhala ndi chotchinga chachikulu chopangidwa ndi zokutira zamadzimadzi osungunuka a polyvinyl mowa pagawo la pulasitiki la polyethylene. Chifukwa chapamwamba chotchinga filimu ya polyvinyl mowa ili ndi katundu wabwino wotchinga ndipo imakwaniritsa zofunikira zachitetezo cha chilengedwe, chiyembekezo chamsika wazinthu zopakira izi ndi chowala kwambiri, ndipo pali msika wotakata pamsika wamakampani azakudya.
9. Kuponyera filimu ya polypropylene (CPP)
Kanema wa Casting polypropylene (CPP) ndi filimu yosatambasulidwa, yosalunjika, yopangidwa ndi kusungunula kuzimitsa kuziziritsa. Amadziwika ndi liwiro la kupanga mwachangu, zokolola zambiri, kuwonekera kwa filimu, gloss, chotchinga katundu, kufewa, makulidwe ofanana ndi abwino, amatha kupirira kutentha kutentha (kutentha kophika pamwamba pa 120 ° C) ndi kusindikiza kutentha kwapansi (kutentha kosindikiza kutentha kosachepera 125 ° C), magwiridwe antchito ndiabwino kwambiri. ntchito kutsatira monga kusindikiza, gulu ndi yabwino, chimagwiritsidwa ntchito nsalu, chakudya, tsiku zofunika ma CD, kuchita gawo lapansi mkati mwa ma CD gulu, akhoza kuwonjezera alumali moyo wa chakudya, kuwonjezera kukongola.
10. Bidirectional polypropylene film (BOPP)
Filimu ya Biaxial polypropylene (BOPP) ndi thumba lachikwama losawoneka bwino lomwe linapangidwa m'zaka za m'ma 1960, lomwe ndi mzere wapadera wopanga kusakaniza zipangizo za polypropylene ndi zowonjezera zowonjezera, kusungunuka ndi kusakaniza, kupanga mapepala, kenako kupanga filimu mwa kutambasula. Kanemayu sikuti ali ndi ubwino wa kachulukidwe otsika, kukana dzimbiri komanso kukana kutentha kwa utomoni woyambirira wa PP, komanso ali ndi zinthu zabwino zowoneka bwino, mphamvu zamakina apamwamba, magwero olemera azinthu zopangira, katundu wosindikiza wabwino kwambiri, ndipo zitha kuphatikizidwa ndi pepala, PET ndi magawo ena. Ndi matanthauzo apamwamba ndi gloss, mayamwidwe abwino kwambiri a inki ndi zomatira zokutira, mphamvu zolimba kwambiri, zotchinga mafuta bwino, mawonekedwe otsika a electrostatic.
11. Kanema wazitsulo
Filimu yazitsulo imakhala ndi mawonekedwe a filimu yapulasitiki ndi zitsulo. Udindo wa zotayidwa plating padziko filimu ndi kutsekereza kuwala ndi kupewa cheza ultraviolet, amene amawonjezera alumali moyo wa nkhani ndi bwino kuwala kwa filimuyo, m'malo mwa zotayidwa zojambulazo pamlingo wakutiwakuti, komanso ali wotchipa, zokongola ndi zabwino zotchinga katundu. Chifukwa chake, filimu yopangidwa ndi zitsulo imagwiritsidwa ntchito kwambiri pakuyika kophatikiza, yomwe imagwiritsidwa ntchito kwambiri mu masikono ndi ma CD ena owuma, odzitukumula, mankhwala ndi zodzoladzola.
Nthawi yotumiza: Jul-19-2023