Mizere yokutira yotulutsa imakhala kapena kufa pa nambala imodzi: mphamvu ya peel pakati pa polima wosungunuka ndi gawo lapansi. Kumata kwa zokutira zowonjezera kumaganiziridwa pawindo la masekondi pang'ono pakati pa siteshoni yochitira chithandizo ndi nip, ndipo palibe kuchuluka kwa kutsika kwa mtsinje komwe kungapulumutse ukonde womwe unalowa mukufa ndi mphamvu yolakwika. Bukhuli likukhudzana ndi makonzedwe a chithandizo, machitidwe a gawo lapansi ndi zosinthika za mzere zomwe zimapereka zomangira zolimba, zobwerezabwereza pa zokutira za extrusion, extrusion lamination ndi mizere ya tandem.
Chifukwa chiyani Extrusion Coating Adhesion Ndi Vuto la Mphamvu Zapamwamba
Polyethylene yosungunuka imasiya ufa pafupifupi madigiri 300 ndipo imafika pamphuno mkati mwa sekondi imodzi kapena ziwiri. Pazeneralo liyenera kunyowetsa gawo lapansi kwathunthu ndikupanga zomangira zachiwiri kudutsa mawonekedwe. Kunyowetsa kumangochitika pamene mphamvu yapansi panthaka ipitilira kugwedezeka kwapamtunda kwa kusungunuka, komwe kwa LDPE kumakhala pafupifupi ma dynes 31 pa centimita ndipo kwa ma copolymers monga EAA amatha kutsika.
Filimu ya polyolefin yosasamalidwa imakhala pa 29 mpaka 31 dynes, kumalire. Ichi ndichifukwa chake zomatira zokutira za extrusion zimalephera pa katundu wosasamalidwa komanso chifukwa chake chithandizo cha corona chimakhala chokhazikika pamzere uliwonse wokutira wa extrusion. Chithandizo chimakweza pamwamba mpaka 38 mpaka 42 ma dynes ndipo, chofunikira kwambiri, chimayambitsa magulu ogwira ntchito a polar omwe amapanga zomangira zenizeni zamakina ndi kusungunuka, osati kungolumikizana kwa van der Waals.
Tanthauzo lothandiza ndiloti simungathe kuweruza kukonzekera ndi mlingo wa dyne nokha. Malo omwe amawerenga ma dynes 40 chifukwa cha kuipitsidwa-kukakala koyendetsedwa kumachita mosiyana ndi komwe kumawerenga ma dynes 40 chifukwa cha okosijeni weniweni. Zatsopano zimafunika: kukalamba komwe kumathandizidwa, ndipo kumatira kwa zokutira kumatsika pang'onopang'ono pamene kusiyana pakati pa chithandizo ndi nip kupitirira masekondi angapo, makamaka pamasiku otentha, achinyezi.
Kukhazikitsa Mphamvu ya Corona kwa Extrusion Coating Adhesion
Kachulukidwe wa Watt ndiye njira yowongolera, yomwe imawonetsedwa ngati ma watts pa sikweya sentimita imodzi pa mphindi imodzi ya malo oyeretsedwa. Popaka utoto wa polyolefin pafilimu kapena zojambulazo, gulu loyambira la 6 mpaka 12 W/cm²/min limakwirira mizere yambiri yopanga.
Werengetsani mwachindunji: kachulukidwe wa watt ndi mphamvu yogwiritsidwa ntchito yogawidwa ndi kuchuluka kwa intaneti ndi liwiro la mzere. Mzere waukulu wa 1.6 m wothamanga pa 200 m/min pogwiritsa ntchito 20 kW umapereka zokolola pafupifupi 6.3 W/cm²/min. Kawiri liwiro m'lifupi nthawi zonse ndipo muyenera kuwirikiza mphamvu kuti mugwire mulingo womwewo wa chithandizo.
Misampha iwiri imagwira ogwira ntchito mobwerezabwereza. Choyamba, kukweza mphamvu kupitirira nsonga yocheperako kumawotcha pamwamba, kumapanga zinyalala zochepera-zolemera-ndipo kufooketsa kumatira kwa zokutira posiya malire osalimba. Chachiwiri, kugwiritsa ntchito mphamvu zochepa kuti mupulumutse mphamvu kumapanga malo omwe amayesa bwino nthawi yomweyo koma amalephera kukalamba.
Sinthani poyesa mphamvu ya peel, osati kuthamangitsa nambala ya dyne. Wonjezerani mphamvu mu masitepe 10 peresenti mpaka peel yamphamvu, kenaka mubwerere kumalo otsika kwambiri omwe amaperekabe malire abwino. Ndilo malo anu opangira.
Kufananiza Chithandizo ndi Substrate
Gawo lirilonse limachita mosiyana, ndipo zokonda zomwe zimagwira ntchito pa imodzi zidzalephera pa mzake.
filimu ya LDPE ndi LLDPE.Mlandu wakale. Imafunikira chithandizo chathunthu ku 38 mpaka 42 dynes. Yang'anani chithandizo chakumbuyo pamakanema ochepera 25 ma microns, omwe amayambitsa kutsekereza pakupumula.
BOPP.Kuwala kwambiri kumatanthauza kuti chithandizo chimakhala pafupi ndi pamwamba ndipo chimakalamba pang'onopang'ono. Zolinga za 38 mpaka 40 ma dynes nthawi zambiri zimakhala zokwanira, koma zomata zokutira za extrusion zimakhudzidwa ndi zowonjezera zomwe zimasamukira kumtunda ndikusokoneza kulumikizana.
PET.Imayamba pafupifupi ma 41 dynes osayatsidwa ndipo imafunika kungodutsa pang'ono kuti ifike 45 mpaka 48. Kupitilira{3}}mankhwala ndikowopsa kwambiri kuno chifukwa pamwamba pamakhala ufa.
Aluminium zojambulazo.Conductive, kotero kukhetsa kumachita mosiyanasiyana ndipo chophimba mpukutucho chimayenera kuthana ndi kuchuluka kwamafuta. Zigawo za okosijeni pa zojambulazo zimagwirizana ndi magulu a polar, ndichifukwa chake zomatira zomatira ku zojambulazo nthawi zambiri zimakhala zabwino kwambiri chithandizo chikakhala cholondola.
Pepala ndi bolodi.Porous ndi chinyezi tcheru. Yang'anani ma 40 mpaka 44 ma dynes, sungani kachulukidwe ka watt, ndikuwongolera chinyezi, popeza nthunzi yamadzi yomwe ili mumpata imapondereza kutulutsa.
Zokutidwa ndi zitsulo.Izi zimafunikira chisamaliro chodekha,{0}}cholamuliridwa bwino chifukwa mawonekedwe ake ndi ochepa. Kuchepetsedwa kwa ntchito kapena makina owongolera-aatmosphere plasma nthawi zambiri amakhala yankho labwinopo kuposa kupha kolemera kwa corona pass.
Zosintha Zamizere Zomwe Zimasintha Kumamatira kwa Extrusion Coating
Chithandizo ndi njira imodzi yokha. Mizere ingapo imasintha zotsatira ndipo iyenera kuyendetsedwa palimodzi.
Nthawi pakati pa chithandizo ndi nip.Ichi ndiye chosinthika chocheperako kwambiri. Njirayi ikhale yaifupi momwe mungathere pamakina. Sekondi iliyonse yowonjezereka yowonekera imawononga magulu a polar pamene akubwereranso ku kuchuluka.
Kutentha kwa intaneti.Kuchita bwino kwamankhwala kumatheka pa intaneti yofunda, ndipo kumamatira kumapindula kuchokera ku gawo lapansi lotentha pa nip. Mosiyana ndi zimenezi, kutentha kwambiri kumachotsa magulu omwe angopangidwa kumene.
Ozone ndi m'zigawo.Ozoni ndi mankhwala-ndi mankhwala, osati mankhwala okha, komanso amawononga. Kutulutsa kokwanira kumateteza zida ndikupangitsa kuti mpweya ukhale wokhazikika, womwe umapangitsa kuti azimatira zomata za extrusion kuti zitheke.
Nip pressure ndikukhala.Kuthamanga kwambiri kumapangitsa kusungunuka kukhala pamwamba pa {{0}porosity ndi kuwongolera makina a keying. Izi zimakwaniritsa mgwirizano wamankhwala kuchokera kumankhwala osati m'malo mwake.
Kufa ndi mpweya kusiyana.Oxidation ya kusungunuka kwa mpweya mu mpweya kumapanga magulu a polar kumbali ya polima. Kutalikirapo kwa mpweya kumawonjezera kusungunuka kwa okosijeni ndipo kumatha kubwezera pang'ono chithandizo chofooka cha gawo lapansi - komanso kungayambitsenso kusakhazikika kwa khosi ndi khosi-mkati.
Chill roll kumaliza.Mpukutu wozizira wa matte umasamutsira kukhwinyata pamwamba pa zokutira, zomwe sizimakhudza mphamvu ya bondi koma zimakhudza kusindikiza kwapansi ndi ntchito yoyatsira.
| Gawo lapansi | Dyne chandamale | Kuchuluka kwa Watt (W/cm²/mphindi) | Chiwopsezo chachikulu |
|---|---|---|---|
| Chithunzi cha LDPE | 38–42 | 6–10 | Chithandizo chakumbuyo |
| Chithunzi cha LLDPE | 38–42 | 8–12 | Kukalamba musanagone |
| BOPP | 38–40 | 5–8 | Kusuntha kowonjezera kwa Slip |
| PET | 45–48 | 3–6 | Kuonjezera-mankhwala, ufa |
| Aluminium zojambulazo | 42–46 | 6–12 | Perekani katundu wotentha |
| Pepala / bolodi | 40–44 | 4–8 | Chinyezi mu mpata |
| Kanema wazitsulo | 44–50 | 3–5 | Kuwonongeka kwachitsulo chosanjikiza |
Kuyeza ndi Kutsimikizira Extrusion Coating Adhesion
Mufunika njira ziwiri zoyezera: imodzi ya pamwamba, ina ya chomangira.
Pamwambapa, zolembera za dyne kapena inki zoyezera zimakupatsani mwayi wopita/ayi-pitani kukawerenga. Agwiritseni ntchito pakatikati ndi m'mbali zonse ziwiri, mutangolandira chithandizo komanso mutangotsala pang'ono kupha ngati njirayo ndi yayitali. Lembani zikhalidwe; mayendedwe oyenda amakuwuzani kuti ma elekitirodi kapena dielectric amafunikira chisamaliro.
Pa bondi, gwiritsani ntchito T-kuyezetsa peel pa chitsanzo chomwe chachiritsidwa. Mukangopaka extrusion, kumamatira kukukulirakulirabe, kotero kuyesa kotengedwa kuchokera pamzere kumapitilira kapena kutsitsa mtengo womaliza kutengera polima. Mchitidwe wokhazikika ndikuyika zitsanzo kwa maola 24 musanayesedwe.
Tsatani mphamvu ya peel polimbana ndi zomwe zakhazikitsidwa mu chipika chosavuta. Pamene extrusion ❖ kuyanika adhesion drifts, chipika amakuuzani ngati mankhwala, gawo gawo lapansi kapena mzere liwiro lasintha, ndipo amadula matenda nthawi kwambiri.
Zolakwa Zomwe Zimawononga Kumata kwa Extrusion Coating
- Kuchiza kutali kwambiri kumtunda.Njira yayitali pakati pa mankhwalawa ndi kufa imalola kuti kumasuka. Yang'anirani siteshoni pafupi kapena kwezani kuchuluka kwa watt kuti mulipire, koma osangovomereza kutayika.
- -zamankhwala.Mphamvu ya cranking "kukhala otetezeka" imapanga malire ofooka a zinyalala zokhala ndi okosijeni ndikuchepetsa kumamatira kwa zokutira. Zambiri sizili bwino.
- Kuyesa kokha pakati pa intaneti.Kumamatira m'mphepete kumalephera poyamba ndikuwulula ma electrode kapena dielectric kuvala.
- Kunyalanyaza chinyezi.Chinyezi chozungulira kwambiri chimapondereza kutulutsa ndikulowetsa madzi mumpata. Zosintha zanyengo-zosintha nthawi ndi nthawi m'malo otentha.
- Kugwiritsa ntchito chophimba cholakwika.Silicone{{0}yopukutira yomwe imayenda mochulukira kwambiri watt imapanga nyimbo zomveka bwino ndipo imapereka chithandizo chosagwirizana, motero kumamatira kwa zokutira kumasiyanasiyana m'lifupi mwake.
- Osayang'ana zolozera zosasinthidwa.Nthawi zonse sungani chitsanzo cha gawo lomwelo popanda chithandizo kuti mutsimikizire kuti wothandizira akugwira ntchitoyo.
FAQ
Q1: Ndi mlingo wanji wa dyne womwe ndikufunika kuti ndizitha kumamatira zokutira bwino za extrusion?
Pamagawo a polyolefin, yang'anani ma dynes 38 mpaka 42 pa centimita pa nsonga, osati potuluka. Kwa PET ndi zojambulazo, 45 dynes ndi chandamale chomasuka. Nthawi zonse tsimikizirani ndi mayeso a peel, popeza dyne level ndi proxy, osati cholinga.
Q2: Kodi ndingapeze zomatira zolimba za extrusion popanda chithandizo cha corona?
Pokhapokha ndi ma substrates omwe ali kale ndi polar chemistry, monga mapepala okutidwa kapena -mafilimu oyambilira. Pa ma polyolefin osayeretsedwa, malo osatetezedwa sangathe kunyowetsedwa modalirika ndi kusungunuka, ndipo kumamatira kumalephera pansi pa kupsinjika kwa makina kapena kutentha.
Q3: Kodi mankhwala amawola mwachangu bwanji asanapakapaka extrusion?
Kuwola kumadalira kutentha, chinyezi ndi gawo lapansi. M'malo ozizira, owuma, ukonde wothandizidwa ukhoza kusunga ma dyne ambiri kwa masiku. Pa mzere wotentha, wonyezimira wa extrusion, kutaya kwa masekondi angapo akuyenda kumatha kukhala ma dynes angapo, choncho sungani njira yoyeretsedwayo yayifupi.
Q4: Kodi apamwamba mzere liwiro kupweteka extrusion ❖ kuyanika adhesion?
Osati ngati kuchuluka kwa watt kumakhala kosasintha. Liwiro limachepetsa nthawi yokhala pakutulutsa, chifukwa chake muyenera kuwonjezera mphamvu molingana. Kumene wothandizira ali padenga la mphamvu yake, liwiro limakhala cholepheretsa ndipo muyenera kuchepetsa kapena kuvomereza chithandizo chochepa.
Q5: N'chifukwa chiyani extrusion ❖ kuyanika adhesion amasiyana mpukutu ndi mpukutu?
Zomwe zimayambitsa ndi kusintha kwa gawo la gawo lapansi, kusintha kwa anti-ma block kapena slip additive loading, kugwedezeka kwa ma electrode gap, kuvala kwa dielectric, ndi chinyezi chozungulira. Log peel zotsatira motsutsana ndi gawo la gawo lapansi kuti mulekanitse gwero.
Q6: Kodi ozoni ndi wowopsa pakumatira kumatira kwa extrusion?
Ozone palokha siili yovulaza ku mgwirizano, koma ozoni wosalamulirika akuwonetsa kutulutsa kosagwirizana, komwe kumasintha mlengalenga wa kusiyana ndipo chifukwa chake kutulutsa. Ozoni yapamwamba imawononganso mbali zachitsulo zapafupi ndi zophimba za rabara.
Q7: Kodi ndiyenera kusamalira mbali zonse za gawo lapansi?
Tetezani mbali yomwe imalandira zokutira. Kuchiza mbali zonse ziwiri nthawi zina kumagwiritsidwa ntchito kuwongolera ma curl kapena kukonza nkhope yobwerera kumbuyo kuti ichitike, koma imachulukitsa kuchuluka kwamafuta ndikuwonjezera chiwopsezo chotsekereza pakupumula.
Mapeto
Kumamatira kwa zokutira zowonjezera ndi njira yotsatila, osati katundu wakuthupi, ndipo zoikamo zochizira ndiye chiwongolero chachikulu chomwe mumawongolera. Khazikitsani kachulukidwe wa watt kuchokera pagawo laling'ono ndi liwiro la mzere, tsimikizirani ndi kuyesa kwa peel pazitsanzo zokhazikika, sungani njira yowongoleredwa kukhala yayifupi, ndi zotsatira za logi kuti kugwedezeka kuwonekere msanga.
Shenzhen Hefeng Jiada Technology imapereka ochiritsa ma corona, makina ochizira a plasma ndi zida zoyeretsera pa intaneti zomwe zimapangidwa kuti zizitha zokutira ndi mizere yoyatsira. Gawani gawo lanu, m'lifupi mwa mzere, liwiro ndi mphamvu ya peel yomwe mukufuna, ndipo mainjiniya athu adzakula malo ochitirako chithandizo ndikupangira zoikamo zomwe zimamatira zomatira za extrusion pambuyo pakuthamanga.