Nkhani

Kodi kuyambitsidwa kwa pulasitiki ndi chiyani?films?

Makanema apulasitiki ndi gulu lofunika kwambiri la zinthu zopangidwa ndi polymer zomwe zimadziwika ndi mawonekedwe awo owonda, osinthasintha komanso malo okulirapo. Zinthu zopangidwa ndi pulasitikizi zimapangidwa pokonza ma polymer resins—kaya ochokera ku mafuta kapena ochokera kuzinthu zongowonjezedwanso—kukhala mapepala osalekeza okhala ndi makulidwe, m'lifupi, komanso mphamvu zamakanika zolamulidwa bwino. Msika wapadziko lonse wa mafilimu apulasitiki wakula kwambiri kuyambira pomwe unayamba pakati pa zaka za m'ma 1900, ndipo kupanga kwapachaka komwe kukuchitika pano kwapitirira matani 100 miliyoni padziko lonse lapansi.

Kusinthasintha kwa mafilimu apulasitiki kumachokera ku kuphatikiza kwawo kwapadera kwa zinthu: zopepuka koma zolimba, zosinthasintha koma zolimba, komanso zowonekera bwino kapena zosawoneka bwino kutengera zomwe zimapangidwa. Makhalidwe amenewa, kuphatikiza ndi ndalama zochepa zopangira, apangitsa mafilimu apulasitiki kukhala ofunikira kwambiri pafupifupi m'magawo onse amakampani amakono ndi moyo watsiku ndi tsiku. Kuyambira kusunga chakudya chatsopano mpaka kulola zamagetsi apamwamba osinthasintha, mafilimu apulasitiki amagwira ntchito zomwe nthawi zambiri sizimawoneka kwa ogwiritsa ntchito koma ndizofunikira kwambiri pakugwira ntchito bwino kwa malonda ndi kukhazikika.

Kupita patsogolo kwaposachedwa kwa sayansi ya zinthu kwakulitsa luso la mafilimu apulasitiki kuposa ntchito zawo zachikhalidwe. Zatsopano zikuphatikizapo mafilimu omwe amasintha katundu poyankha zinthu zachilengedwe, njira zina zowola m'malo mwa mapulasitiki achikhalidwe, ndi mafilimu otchinga amphamvu kwambiri omwe ali ndi mphamvu zoteteza zomwe sizinachitikepo. Nthawi yomweyo, nkhawa zomwe zikukulirakulira za chilengedwe zalimbikitsa chitukuko cha njira zobwezeretsanso zinthu zakale komanso zipangizo zamakanema zomwe zimasunga magwiridwe antchito pomwe zikuchepetsa kuwononga chilengedwe.

Ndi mtundu wanji wa filimu ya pulasitiki?

Mafilimu Otchuka Kwambiri

Mafilimu a polyethylene ndi omwe amagwiritsidwa ntchito kwambiri pa filimu ya pulasitiki, ndipo amapanga zoposa 40% ya filimu yonse ya pulasitiki yomwe imagwiritsidwa ntchito. Mitundu Yaikulu ndi Makhalidwe a Mafilimu a Polyethylene:

1. Filimu ya Polyethylene Yotsika Kwambiri (LDPE)

Mafilimu a LDPE amadziwika ndi kusinthasintha kwawo, kuwonekera bwino, komanso mphamvu zawo zopanda poizoni, zopanda fungo. Ali ndi mphamvu zabwino zotsutsana ndi madzi, zoteteza chinyezi, komanso zokhazikika pa mankhwala, zomwe zimapangitsa kuti akhale oyenera kulongedza chakudya, mankhwala, ndi zinthu zomwe zimagwiritsidwa ntchito tsiku ndi tsiku. Mafilimu a LDPE alinso ndi mphamvu zabwino zotsekera kutentha ndipo nthawi zambiri amagwiritsidwa ntchito ngati zigawo zotsekera kutentha m'mafilimu ophatikizika. Komabe, ali ndi mphamvu zochepa zoletsa kutentha ndipo sali oyenera kulongedza kutentha kwambiri.

2. Filimu ya Polyethylene Yokhala ndi Kachulukidwe Kakakulu (HDPE)

Makanema a HDPE ndi olimba, opepuka pang'ono, komanso oyera. Amawonetsa mphamvu yokoka bwino, kukana chinyezi, kukana kutentha, komanso kukana mafuta poyerekeza ndi LDPE. HDPE ndi yoyenera kupakidwa utoto wolimba komanso mafilimu amafakitale koma alibe mawonekedwe komanso kuwala kokwanira.

3. Filimu ya Polyethylene Yotsika Kwambiri (LLDPE)

Makanema a LLDPE amaphatikiza kusinthasintha kwa LDPE ndi mphamvu ya HDPE, zomwe zimapereka mphamvu zabwino kwambiri zotambasula komanso kukana kubowoka. Amagwiritsidwa ntchito kwambiri m'mafilimu otambasula, mafilimu ochepetsa, ndi mafilimu okutira, zomwe zimapangitsa kuti akhale abwino kwambiri popaka okha mwachangu.

4. Filimu ya Metallocene Linear Low-Density Polyethylene (mLLDPE)

Makanema a mLLDPE amapangidwa pogwiritsa ntchito metallocene catalysts ndipo amapereka mphamvu yayikulu yogwira ntchito, mphamvu yokoka, komanso kuwonekera bwino poyerekeza ndi LLDPE yachizolowezi. Amalola kuchepetsa makulidwe a filimu ndi kupitirira 15%, motero amachepetsa mtengo wa zinthu. mLLDPE imagwiritsidwa ntchito kwambiri m'mafilimu obiriwira, makanema opaka zinthu zolemera, makanema ocheperako, ndi zida zapamwamba zopaka zinthu.

Mafilimu Ena a Pulasitiki

1. Mafilimu a Polypropylene (PP): Amadziwika kuti ndi otsika kwambiri (160-170°C), zomwe zimapangitsa kuti akhale oyenera kugwiritsidwa ntchito podzaza ndi madzi otentha komanso poyikamo zinthu zotetezeka mu microwave. Mafilimu a PP amakhala otetezedwa bwino ndi mankhwala ndipo nthawi zambiri amagwiritsidwa ntchito poyikamo zakudya zokhwasula-khwasula komanso poyikamo zinthu zophera tizilombo toyambitsa matenda.

2. Mafilimu a Polyvinyl Chloride (PVC): Amagwiritsidwa ntchito chifukwa cha kumveka bwino komanso kusindikizidwa bwino koma akukumana ndi kuchepa kwa kugwiritsidwa ntchito chifukwa cha nkhawa zachilengedwe. Magwiritsidwe otsalawa akuphatikizapo ma blister packaging ndi ma cling film ena5.

3. Mafilimu a Polyester (PET): Okhala ndi mphamvu zokoka komanso kutentha kokhazikika, mafilimu a PET ndi ofunikira kwambiri pa zamagetsi osinthasintha, matepi a maginito, ndi ma CD a chakudya okhala ndi zopinga zambiri. PET (BOPET) yolunjika mbali ziwiri imakhala ndi mphamvu zowongolera makina komanso zopinga zambiri.

Makanema Apadera a Polymer:

1. Polyamide (Nayiloni): Mphamvu yabwino kwambiri yotchinga mpweya kuti chakudya chisungidwe bwino

2. Polyvinylidene Chloride (PVDC): Kugwira ntchito bwino kwambiri kwa chinyezi ndi chotchinga cha mpweya

3. Polylactic Acid (PLA): Njira ina yatsopano yochokera ku zamoyo yokhala ndi manyowa okhazikika, ngakhale kuti nthawi zambiri imachepetsedwa ndi kupunduka—zaposachedwapa zapanga mafilimu osinthasintha a PLA mwa kuphatikiza mapulasitiki a polyether mwachindunji mu unyolo wa polima.

Njira Zopangira Mafilimu Apulasitiki

1. Kutulutsa Filimu Yopsereza: Njira yodziwika bwino ya mafilimu a PE, pomwe polima wosungunuka amatulutsidwa kudzera mu die yozungulira, kudzazidwa kukhala thovu, ndikuziziritsidwa kuti apange chubu chomwe chingaphwanyidwe kukhala filimu yokhala ndi zigawo ziwiri. Njirayi imapereka mphamvu zofananira zamakina m'njira zonse ziwiri zamakina komanso zopingasa.

2. Kutulutsa Filimu Yopangidwa ndi Katundu: Kusungunuka kwa polymer kumatulutsidwa kudzera mu die yathyathyathya kupita ku mpukutu wozizira, ndikupanga mafilimu omveka bwino komanso makulidwe ofanana. Kawirikawiri pamafilimu a PP ndi PET pomwe mawonekedwe a kuwala ndi ofunikira.

3. Kukonza Makalendala: Amagwiritsidwa ntchito makamaka pa mafilimu a PVC, pomwe polima imadutsa mu ma roller otenthedwa kuti akwaniritse kulamulira kolondola kwa makulidwe. Mafilimu okonzedwa nthawi zambiri amakhala ndi mawonekedwe apamwamba koma mawonekedwe ake safanana m'lifupi.

4. Kuyika Mayankho: Kumagwiritsidwa ntchito pa mafilimu apadera pomwe kufanana kwambiri kapena kutentha kumalepheretsa kusungunuka. Polima imasungunuka mu solvent, imaponyedwa pa lamba, ndikuumitsidwa kuti ipange filimu - yodziwika bwino pamafilimu ena owonongeka ndi kugwiritsa ntchito nembanemba.

5. Kuyang'ana mbali ziwiri: Mafilimu amatambasulidwa mbali zonse ziwiri za makina ndi zopingasa, kaya motsatizana (chimango chofewa) kapena nthawi imodzi (njira yopangira thovu), zomwe zimapangitsa kuti mphamvu, kumveka bwino, komanso zinthu zotchinga zikhale bwino. Mafilimu a PP (BOPP) ndi PET (BOPET) omwe ali ndi mbali ziwiri ndi miyezo yamakampani yopangira ma CD apamwamba.

Zochitika Zatsopano ndi Zatsopano mu Mafilimu Apulasitiki

Makampani opanga mafilimu apulasitiki akusintha, ndipo akugogomezera kwambiri kukhazikika, magwiridwe antchito, komanso magwiridwe antchito. Zina mwa zinthu zodziwika bwino ndi izi:

1.Othandizira Osatsegula a PFAS:Mankhwala otsetsereka okhazikika omwe amapewa zinthu za per- ndi polyfluoroalkyl (PFAS), zomwe zimathandiza pakugwira ntchito bwino komanso pazovuta zachilengedwe.

2. Njira Zosungira Zinthu Zosatha: Makampani monga Fox Packaging apambana kuchotsa PFAS m'njira zawo zonse zosinthira ma CD, mogwirizana ndi malamulo ambiri komanso zomwe zikuchitika m'makampani. US FDA yatsimikiza mtima kuchotsa PFAS m'ma CD, zomwe zathandiza kuchepetsa kwambiri PFAS pazakudya.

Mayankho atsopano a PFAS-Free processing akuthandizira mafilimu apulasitiki ochokera ku SILIKE

SILIKE imagwiritsa ntchito njira yodziwira mavuto ndi zinthu zake za mndandanda wa SILIMER, zomwe zimapereka zatsopano.Zothandizira polima zopanda PFAS (PPAS)). Mzere wonse wazinthuzi uli ndi ma PPA opanda PFAS 100%, zinthu zopanda fluorine, ndi ma masterbatches a PPA opanda fluorine, opanda PFAS. Mwa kuchotsa kufunikira kwa zowonjezera za fluorine, zinthuzi zimathandizira kwambiri njira yopangira zinthu za LLDPE, LDPE, HDPE, mLLDPE, PP, ndi mafilimu. Zimagwirizana ndi malamulo aposachedwa azachilengedwe pomwe zimathandiziranso kupanga bwino, kuchepetsa nthawi yogwira ntchito, komanso kukonza mtundu wonse wazinthu. Ndi PPA yopanda SILIKE PFAS imabweretsa zabwino zomaliza zazinthu, kuphatikiza: kuchotsa kusweka kwa khungu la shaki, kusalala bwino, komanso mtundu wa pamwamba.

Kuyang'ananjira zina zokhazikika zopangira mafilimu apulasitiki or PPA ya polyethylene functional-addive masterbatches?  SILIKE’s PFAS-Free PPA solutions can help enhance your Plastic film production while aligning with environmental standards. Visit web: www.siliketech.com or contact us at amy.wang@silike.cn to discover more.