Nkhani

Kodi kuyambitsidwa kwa pulasitiki ndi chiyanifizi?

Mafilimu apulasitiki amaimira gulu lofunika kwambiri la zipangizo za polymeric zomwe zimadziwika ndi chikhalidwe chawo chowonda, chosinthika komanso malo ochulukirapo. Zida zopangidwa mwaukadaulozi zimapangidwa pokonza utomoni wa polima-mwina wotengedwa ku petroleum kapena wochulukira kuchokera kuzinthu zongowonjezwdwanso-kukhala mapepala osalekeza okhala ndi makulidwe oyendetsedwa bwino, m'lifupi, ndi makina amakina. Msika wapadziko lonse lapansi wamakanema apulasitiki wakula kwambiri kuyambira pomwe udayamba m'zaka za m'ma 1900, ndipo kupanga kwapachaka kwaposachedwa kupitilira matani 100 miliyoni padziko lonse lapansi.

Kusinthasintha kwa mafilimu apulasitiki kumachokera ku kuphatikiza kwawo kwapadera kwa zinthu: zopepuka koma zolimba, zosinthika koma zamphamvu, komanso zowonekera kapena zowoneka bwino kutengera momwe amapangidwira. Makhalidwewa, kuphatikizidwa ndi ndalama zotsika mtengo zopangira, zapangitsa kuti mafilimu apulasitiki akhale ofunikira pafupifupi gawo lililonse lamakampani amakono komanso moyo watsiku ndi tsiku. Kuchokera pakusunga zakudya zatsopano mpaka kupangitsa zamagetsi zosinthika, makanema apulasitiki amagwira ntchito zomwe nthawi zambiri siziwoneka kwa ogwiritsa ntchito koma zofunika kwambiri pakuchita bwino kwazinthu komanso kukhazikika.

Kupita patsogolo kwaposachedwa kwa sayansi yakuthupi kwakulitsa luso la mafilimu apulasitiki kuposa momwe amachitira kale. Zatsopano zimaphatikizanso mafilimu omwe amasintha katundu potengera kukhudzidwa kwa chilengedwe, njira zina zowola m'malo mwa mapulasitiki wamba, komanso mafilimu otchinga kwambiri omwe ali ndi mphamvu zoteteza zomwe sizinachitikepo. Nthawi yomweyo, nkhawa zomwe zikukulirakulira za chilengedwe zalimbikitsa chitukuko cha makina obwezeretsanso zinthu zotsekeka komanso zida zamakanema zomwe zimagwira ntchito bwino ndikuchepetsa kuwononga chilengedwe.

Ndi filimu yanji ya pulasitiki?

Mafilimu Odziwika Kwambiri

Mafilimu a polyethylene ndi omwe amagwiritsidwa ntchito kwambiri ndi mafilimu apulasitiki, omwe amawerengera 40% ya filimu yonse ya pulasitiki. Mitundu Yaikulu ndi Makhalidwe Amafilimu a Polyethylene:

1. Filimu ya Polyethylene Yotsika Kachulukidwe (LDPE)

Mafilimu a LDPE amadziwika ndi kusinthasintha kwawo, kuwonekera, komanso zopanda poizoni, zopanda fungo. Amakhala ndi madzi abwino kwambiri, amateteza chinyezi, komanso kukhazikika kwamankhwala, kuwapangitsa kukhala oyenera kuyika zakudya, mankhwala, ndi zinthu zomwe zimagwiritsidwa ntchito tsiku ndi tsiku. Mafilimu a LDPE amakhalanso ndi zinthu zabwino zotsekera kutentha ndipo nthawi zambiri amagwiritsidwa ntchito ngati zigawo zosindikizira kutentha m'mafilimu ophatikizana. Komabe, ali ndi kutentha kosasunthika ndipo siwoyenera kulongedza kutentha kwambiri.

2. Kachulukidwe ka Polyethylene Film (HDPE)

Makanema a HDPE ndi olimba, osawoneka bwino, komanso oyera mumitundu. Amawonetsa kulimba kwamphamvu kwambiri, kukana chinyezi, kukana kutentha, komanso kukana kwamafuta poyerekeza ndi LDPE. HDPE ndiyoyenera kulongedza zokhazikika komanso makanema aku mafakitale koma imakhala yowonekera pang'ono komanso yonyezimira.

3. Filimu ya Linear Low-Density Polyethylene (LLDPE)

Makanema a LLDPE amaphatikiza kusinthasintha kwa LDPE ndi mphamvu ya HDPE, yopereka mawonekedwe abwino kwambiri otambasulira komanso kukana kubowola. Amagwiritsidwa ntchito kwambiri m'mafilimu otambasula, mafilimu ocheperako, ndi mafilimu okulungidwa, kuwapanga kukhala abwino kulongedza mwachangu kwambiri.

4. Metallocene Linear Low-Density Polyethylene Film (mLLDPE)

Makanema a mLLDPE amapangidwa pogwiritsa ntchito zida zopangira zitsulo za metallocene ndipo amapereka mphamvu zochulukira, zokolola zolimba, komanso kuwonekera bwino poyerekeza ndi LLDPE wamba. Amalola kuchepetsedwa kwa makulidwe a kanema ndi 15%, potero amachepetsa mtengo wazinthu. mLLDPE imagwiritsidwa ntchito kwambiri m'mafilimu owonjezera kutentha, mafilimu onyamula katundu wolemetsa, mafilimu ocheperako, ndi zida zapamwamba zonyamula.

Mafilimu Ena Apulasitiki

1. Mafilimu a Polypropylene (PP): Odziwika bwino chifukwa cha kusungunuka kwawo kwakukulu (160-170 ° C), kuwapanga kukhala oyenerera ntchito zodzaza kutentha ndi kuyika kwa microwave. Makanema a PP amapereka kukana kwamankhwala kwabwino kwambiri ndipo nthawi zambiri amagwiritsidwa ntchito popakira zakudya zoziziritsa kukhosi komanso zomangira zotsekera zida zachipatala.

2. Mafilimu a Polyvinyl Chloride (PVC): Ofunika kwambiri momveka bwino komanso osindikizidwa koma akukumana ndi kuchepa kwa kugwiritsidwa ntchito chifukwa cha zovuta zachilengedwe. Ntchito zotsalira zikuphatikiza kuyika matuza ndi makanema ena omata5.

3. Mafilimu a Polyester (PET): Kudzitamandira kulimba kwamphamvu komanso kukhazikika kwamafuta, mafilimu a PET ndi ofunikira pamagetsi osinthika, matepi a maginito, ndi kulongedza zakudya zotchinga kwambiri. Biaxially-oriented PET (BOPET) imasonyeza makamaka makina opangidwa ndi zolepheretsa.

Makanema apadera a Polymer:

1. Polyamide (Nayiloni): Zinthu zapadera zotchinga mpweya wa okosijeni pofuna kusunga chakudya

2. Polyvinylidene Chloride (PVDC): Chinyezi chodziwika bwino komanso chotchinga mpweya

3. Polylactic Acid (PLA): Njira ina yomwe imachokera ku bio-based ndi compostability, ngakhale kuti nthawi zambiri imakhala yochepa chifukwa cha brittleness-kupita patsogolo kwaposachedwa kwatulutsa mafilimu osinthika a PLA pogwiritsa ntchito polyether plasticizers mwachindunji muzitsulo za polima.

Njira Zopangira Mafilimu Apulasitiki

1. Kuwomba Mafilimu Ophulika: Njira yaikulu ya mafilimu a PE, kumene polima wosungunuka amatulutsidwa kudzera mukufa kozungulira, kulowetsedwa mu thovu, ndi kuzizidwa kuti apange chubu chomwe chingathe kuphwanyidwa kukhala filimu yamitundu iwiri. Njirayi imapereka mphamvu zamakina moyenera pamakina onse komanso njira zodutsa.

2. Cast Film Extrusion: Polima yosungunuka imatulutsidwa kudzera mumtambo wathyathyathya pampukutu wozizira, kupanga mafilimu omveka bwino komanso makulidwe ofanana. Zodziwika kwa makanema a PP ndi PET pomwe mawonekedwe owoneka ndi ofunikira.

3. Calendering: Amagwiritsidwa ntchito kwambiri pamafilimu a PVC, pomwe ma polima amadutsa pagulu laodzigudubuza kuti akwaniritse kuwongolera ndendende. Makanema akalendala nthawi zambiri amakhala ndi mawonekedwe apamwamba kwambiri koma osafanana ndi makina owoneka bwino m'lifupi mwake.

4. Solution Casting: Amagwiritsidwa ntchito m'mafilimu apadera pomwe kufanana kwambiri kapena kumva kutentha kumalepheretsa kusungunula. Polimayo amasungunuka mu zosungunulira, kuponyedwa pa lamba, ndikuwumitsa kupanga filimu - yodziwika bwino m'mafilimu ena omwe amatha kuwonongeka ndi nembanemba.

5. Biaxial Orientation: Mafilimu amatambasulidwa m'makina onse ndi njira zodutsa, mwina motsatizana (tenter frame) kapena panthawi imodzimodzi (njira ya bubble), akuwongolera kwambiri mphamvu, kumveka bwino, ndi zotchinga katundu. Makanema a Biaxially-oriented PP (BOPP) ndi PET (BOPET) ndi miyezo yamakampani yonyamula bwino kwambiri.

Zochitika Zatsopano ndi Zatsopano mu Mafilimu Apulasitiki

Makampani opanga mafilimu apulasitiki akupita patsogolo, ndikugogomezera kwambiri kukhazikika, kuchita bwino, komanso kuchita bwino. Zina zodziwika bwino ndi izi:

1.PFAS-Free Slip Agents:Ma slip slip agents omwe amapewa per- ndi polyfluoroalkyl substances (PFAS), kuthana ndi zosowa za magwiridwe antchito komanso zovuta zachilengedwe.

2. Njira Zosasunthika: Makampani monga Fox Packaging achotsa bwino PFAS pazosankha zawo zonse zosinthika, zogwirizana ndi machitidwe owongolera ndi makampani. US FDA yapeza kudzipereka kodzifunira kuti ichotse PFAS pamapaketi azakudya, zomwe zikuthandizira kuchepetsa kwambiri kuwonekera kwazakudya za PFAS.

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

SILIKE imatenga njira yolimbikitsira ndi zinthu zake za SILIMER, zomwe zimapereka zatsopanoPFAS-free polima processing aids (PPAs). Mzere wokwanira wazinthuzi uli ndi 100% ma PPA opanda ma PFAS opanda fluorine, ma PPA opanda fluorine, ndi masterbatches opanda PFAS, opanda fluorine a PPA. Pochotsa kufunikira kwa zowonjezera za fluorine, zinthuzi zimathandizira kwambiri kupanga kwa LLDPE, LDPE, HDPE, mLLDPE, PP, ndi zinthu zamakanema. Amagwirizana ndi malamulo aposachedwa azachilengedwe pomwe amathandiziranso kupanga bwino, kuchepetsa nthawi yopumira, ndikuwongolera zinthu zonse. Ndi SILIKE PFAS-free PPA imabweretsa zabwino Zogulitsa, kuphatikiza: kuchotsedwa kwa fracture yosungunuka (khungu la shaki), kusalala bwino, komanso mawonekedwe apamwamba.

Kuyang'ananjira zina zokhazikika pakupanga mafilimu apulasitiki or PPA ya polyethylene yogwira ntchito-yowonjezera 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.