I-low density polyethylene, evame ukufushaniswa ngokuthi i-LDPE, isiphenduke enye yezinto ezisetshenziswa kakhulu futhi ezisetshenziswa kabanzi kuma-thermoplastics emhlabeni wonke kwezokukhiqiza. Inhlanganisela yayo eyingqayizivele yokuguquguquka, ukuqina, nokuzinza kwamakhemikhali iyenza ibaluleke kakhulu kumafilimu okupakisha, amabhodlela okucindezela, ukufakwa kukagesi kukhebula, kanye nemikhiqizo yansuku zonke engabaleki. Njengoba isidingo sezinto ezilula, ezigaywa kabusha, futhi ezingabizi kakhulu siqhubeka sikhula, ukuthola ama-LDPE granules athembekile kumkhiqizi okhokhelwayo sekuphenduke into ebalulekile kuma-converters, abanikazi bemikhiqizo, kanye nezinkampani zokuhweba ngokufanayo. I-Dongguan Hanxin Plastic Technology Co., Ltd. ingumhlinzeki okhethekile we-LDPE nezinye izinto zokusetshenziswa zepolyethylene, ekhonza amakhasimende kuzo zonke izimboni zokupakisha, ezolimo, ezobuchwepheshe be-elekthronikhi, kanye nezokwakha. Ngeminyaka yokuhlangenwe nakho kokuhlanganisa nokusabalalisa, inkampani ihlanganisa ikhwalithi yomkhiqizo ezinzile nentengo eqondile yasefektri kanye nokusekelwa kobuchwepheshe okusheshayo. Lesi sihloko sichaza ukuthi iyini i-LDPE, isebenza kanjani, isetshenziswa kuphi, futhi kungani i-Dongguan Hanxin Plastic Technology Co., Ltd. ingumlingani othembekile wamabhizinisi afuna ukunikezwa okungaguquguquki kwesikhathi eside.

Abathengi namuhla abasafuni nje i-resin eshibhile kunazo zonke emakethe; bafuna umhlinzeki oqonda ukuziphatha kokucubungula, izidingo zomthetho, nokuthembeka kokulethwa. Iqoqo elilodwa le-LDPE engahambisani lingabangela ukuphuka kwefilimu, ukungalingani kobukhulu bodonga ekubunjweni ngokufutha, noma izinkinga ebusweni ezicekela phansi ukukhiqizwa konke. Ngenxa yalesi sizathu, amaqembu okuthenga anolwazi ahlola ikhono lomhlinzeki lokuhlola, ukulandelela iqoqo, kanye nesevisi yezobuchwepheshe ngaphambi kokufaka i-oda. I-Dongguan Hanxin Plastic Technology Co., Ltd. yakha imodeli yayo yebhizinisi ngqo kulezi zinkinga, inikeza imininingwane ebhaliwe, ukuqinisekiswa kwesampula, kanye nezeluleko zobunjiniyela ezisabelayo. Izigaba ezingezansi zinikeza umbono ophelele mayelana nempahla ngokwayo kanye nezinzuzo zezentengiselwano zokusebenza nalo mhlinzeki we-LDPE ozinikele.

I-LDPE, noma i-polyethylene enokuminyana okuphansi, iyi-thermoplastic eyenziwe nge-free-radical polymerization yegesi ye-ethylene ngaphansi kwengcindezi ephezulu kanye nezinga lokushisa eliphezulu. Inqubo yengcindezi ephezulu ikhiqiza amaketanga e-polymer anamagatsha amade, angajwayelekile, futhi lawo magatsha avimbela amaketanga ukuthi ahlangane ndawonye ngokuqinile. Ngenxa yalokho, into inokuminyana okuphansi okulinganiselwa ku-0.910 kuya ku-0.940 g/cm³, okuphansi kunezinye izinhlobo eziningi ze-polyethylene. Lesi sakhiwo samangqamuzana anamagatsha siphinde sinikeze i-LDPE ubumnene bayo obujwayelekile, i-crystallinity ephansi, kanye nokucaca okuhle kwe-optical kumafilimu amancane. Ngenxa yokuthi i-polymer iqukethe i-carbon ne-hydrogen kuphela, ayisebenzi ngamakhemikhali, ayinabo ubuthi, futhi ifaneleka kahle ukusetshenziswa ezindaweni zokudla kanye nezokwelapha uma ikhiqizwa ngokucaciswa okufanele.

Uma kuqhathaniswa imindeni ye-polyethylene, umehluko ekuhlukaniseni nasekuminyaneni kwako uchaza umehluko ekusebenzeni. I-high density polyethylene, evame ukuxoxwa ngayo kanye ne-LDPE ngaphansi kwesifinyezo esithi hdpe ldpe, inokuhlukanisa okuncane, ukuminyana okungaphezu kuka-0.940 g/cm³, kanye nesakhiwo esiqinile, esinamandla futhi esingabonakali kahle. I-Linear low density polyethylene, efingqwa ngokuthi LLDPE, ihlezi phakathi kwalokhu kokubili: isebenzisa ama-copolymer monomers afana ne-butene noma i-hexene ukwakha amagatsha amafushane, alinganayo anikeza amandla aphezulu okudonsa kanye nokumelana nokubhobozwa. Njengoba i-Ipulasitiki Ejwayelekile impahla yesigaba, i-LDPE ihlala iyisinqumo esithandwayo lapho ukucaca, ukuthambile, ukusebenza kahle kokuvala, nokucubungula okulula kubaluleke kakhulu kunokuqina okuphezulu. Ngakho-ke ukukhetha izinga elifanele kuyindaba yokufanisa isakhiwo samangqamuzana nezidingo zomkhiqizo wokugcina.

Isici esidume kakhulu se-LDPE ukuguquguquka kwayo. Ifilimu eyenziwe ngale resin iyagoba ngaphandle kokuqhekeka, ihlehlela kahle phezu kwezimo ezingajwayelekile, futhi imelana nokugoqwa okuphindaphindiwe, yingakho ibusa izimakethe zezikhwama nefilimu enciphayo. Ukuqina kwayo nokumelana nokudabuka kuvumela ukulinganisa okuncane ukuthwala imithwalo ebalulekile, kunciphisa ukusetshenziswa kwezinto kanye nezindleko eziphelele ngephakethe ngalinye. I-LDPE iphinde inikeze ukumelana namakhemikhali okumangalisayo, ihlala ingathinteki yizinto eziningi ezinjenge-asidi, ama-alkali, utshwala, nezixazululo zamanzi emazingeni okushisa ajwayelekile. Ezinhlelweni zikagesi, i-dielectric constant yayo ephansi kanye ne-volume resistivity ephezulu kuyenza ibe isivikeli esithembekile sezintambo kanye nejakethi yekhebula. Lezi zici ezihlangene zichaza ukuthi kungani abakhiqizi bengavamile ukufaka enye into esikhundleni salokhu kusetshenziswa lapho kudingeka i-polymer ethambile, evalelekayo, nezinzile ngamakhemikhali.

Ikhono lokucubungula ingenye inzuzo enkulu. I-LDPE incibilika kalula, igeleza kahle, futhi ibekezelela iwindi lokucubungula elibanzi emigqeni yefilimu ephephwayo, izinto zokumboza ngokucindezela, imishini yokubumba ngokujova, kanye nemishini yokubumba ngokufutha. Yakha izivalo zokushisa eziqinile emazingeni okushisa aphansi, okuvikelayo okuqukethwe okuzwela ukushisa futhi kusheshise imigqa yokupakisha. Le resin iphinde igayiseke kalula: imfucuza yangemuva kwezimboni ingagaywa kabusha futhi yenziwe amapellets kabusha, kuyilapho ifilimu yangemuva kokusetshenziswa iqoqwa kakhulu ezinhlelweni zomthwalo womkhiqizi onwetshiwe. Kubahlanganisi abafuna ukuguqula ukuthambile noma ukunamathela, ukuhlanganisa ne-I-thermoplastic elastomer kungaqhubeka nokulungisa umuzwa wokugcina nokunwebeka. Ukusebenziseka kabusha kanye nokucubungula okulula kuhlangene kwenza i-LDPE ibe ngenye yamapholima asebenza kahle kakhulu kwezomnotho atholakalayo embonini yesimanje.

Ukusetshenziswa okukhulu kwe-ldpe eyodwa kuyifilimu yokupakisha. Ifilimu ye-LDPE evuthelwayo iba izikhwama zokuthwala, izikhwama zokukhiqiza, ama-liners, i-shrink wrap, ama-stretch hoods, kanye nezingqimba ze-lamination zezikhwama zokudla. Ngenxa yokuthi le nto ayisebenzi futhi ayinaphunga, yamukelwa kabanzi ukuthinta ukudla ngqo, inqobo nje uma kukhethwa izinga elifanele le-food-grade kanye nezithako. I-extrusion coating isebenzisa ungqimba oluncane lwe-LDPE ephepheni, ebhodini, naku-aluminium foil ukudala izithiyo zomswakama kumabhokisi eziphuzo kanye ne-cup stock. Ekubunjweni kwe-blow molding, i-resin yakha amabhodlela acindezelayo ezimonyo, imithi, kanye nezinto zokuhlola zaselabhorethri, lapho ukuguquguquka nokumelana namakhemikhali kubalulekile. Amazinga e-injection molding akhiqiza ama-caps, izivalo, iziqukathi, amathoyizi, kanye nezinto zasendlini ezizuza ekuthambekeni nasekumelaneni nokushaywa.

Ngaphandle kwezinto zokupakisha ezisetshenziswa abathengi, i-LDPE isekela izimboni eziningi zobuchwepheshe. Kwezolimo, isetshenziselwa ifilimu yokumboza, izembozo zendlu yokugcina izitshalo, ukugoqa i-silage, namapayipi okunisela, lapho ukuzinza kwe-UV namandla emishini kubalulekile. Kweze-elekthronikhi, isebenza njengesivikelo kanye nokumboza amakhebula anamandla aphansi, amakhebula e-coaxial, kanye nezintambo zedatha. Kwezokwakha, ivela ezindongeni zokuvimbela umhwamuko, ukugoqa amapayipi, izinto zokugcwalisa izikhala zokunweba, kanye namafilimu okuvimbela amanzi. Ububanzi balezi zinhlelo zokusebenza busho ukuthi umhlinzeki oyedwa kufanele akwazi ukunikeza amagreddi amaningi, amaphakethe ezithako, kanye namafomethi okupakisha. Abathengi abadinga isiqondiso esiqondene nohlelo lokusetshenziswa bangabuyekeza okomhlinzekiUkusetshenziswa umtapo wolwazi ukuze ubone ukuthi izinto ezifanayo zisebenza kanjani emikhiqizweni yangempela yokugcina.

Dongguan Hanxin Plastic Technology Co., Ltd., eyaziwa ngesiShayina ngokuthi 东莞涵鑫塑胶科技有限公司, ingumhlinzeki okhokhelayo wama-LDPE granules nezinye izinto zokusetshenziswa ze-polyethylene ezinhloko-dolobha eDongguan, esifundazweni saseGuangdong. IDongguan isenkabeni yePearl River Delta, enye yezindawo zokukhiqiza eziminyene kakhulu emhlabeni, okunikeza inkampani ukufinyelela okuqondile emachwebeni amakhulu, izinhlelo zokuthutha, kanye nezimboni zokucubungula ezingaphansi. Inkampani isebenzela kokubili abaguquli basekhaya nabathengi bamazwe ngamazwe, ihlanganisa izinsiza zokukhiqiza zasekhaya namava okuthumela kwamanye amazwe. Ibhizinisi layo eliyinhloko lihlanganisa ukutholakala, ukulawulwa kwekhwalithi, ukugcinwa, kanye nokusabalalisa kwe-polyethylene nezinye izinto zokusetshenziswa zepulasitiki. Eminyakeni edlule isungule ubudlelwano obuzinzile nabadayisi be-petrochemical abaphezulu, obusekela ukuhlinzekwa okungaguquki ngisho noma izimo zemakethe ziqinisa. Izivakashi zingafunda kabanzi ngomlando wenhlangano, ithimba, kanye nezitifiketi ku-Mayelana Nathi ikhasi.

Ngokokusebenza, inkampani yakheke ngendlela egxile ekuphenduleni ngokushesha. Onjiniyela bezentengiselwano baphendula imibuzo yezobuchwepheshe ngqo esikhundleni sokudlulisa yonke imibuzo ngezigaba eziningi zokuphatha. Isitoko siphethwe ngezinga, i-melt index, kanye nohlobo lwe-additive ukuze ama-oda aphindwayo aqondaniswe ngokunembile nokuthunyelwa kwangaphambili. Imibhalo, kuhlanganise nezitifiketi zokuhlaziya, amashidi edatha yokuphepha, kanye nohlu lokupakisha, ilungiselelwa ngaphambi kokuthunyelwa ukuze kugwenywe ukubambezeleka kwempilo. Ithimba liphinde lilandelele ukunyakaza kwemakethe entengo ye-ethylene kanye nomthamo wokuthumela ukuze amakhasimende athole izikhathi zokulinda ezingokoqobo esikhundleni sezethembiso ezinethemba elikhulu. Le nhlanganisela yokuziphatha kwezohwebo nolwazi lwezobuchwepheshe iyona ehlukanisa uchwepheshe wangempela we-LDPE kumxhumanisi wokuhweba ojwayelekile.

Isizathu sokuqala sokuthi amakhasimende abuyisele umkhiqizo ukungaguquguquki kwekhwalithi. Yonke into engenayo ihlolwa ngokumelene nezicaciso okuvunyelwene ngazo mayelana ne-melt index, ukuminyana, umswakama, okuqukethwe komlotha, nokubukeka kwe-pellet ngokubonakalayo. Abasebenzi bokukhiqiza kanye nabasebenzi basendlini yokugcina izimpahla balandela ukujikeleza kwe-first-in-first-out ukuze isitokwe esidala singalokothi sithunyelwe ngaphambi kwempahla entsha ngaphandle kokuhlolwa. Izinombolo ze-batch zixhumanisa ukulethwa ngakunye emuva kurekhodi lokuqala lokukhiqiza, okwenza kube nokwenzeka ukuphenya noma isiphi isikhalazo sangemuva ngokushesha. Ngenxa yokuthi izinqubo ze-extrusion ne-molding zizwela ekuhlukahlukeni okuncane, le ndlela yokuziphatha ivikela ngqo izinga lokukhiqiza lomthengi. I-resin ezinzile isho umkhiqizo ozinzile, izingxenye ezimbalwa ezilahliwe, kanye nezindleko eziphansi zokuguqulwa zizonke.

Isizathu sesibili inani lokuhweba. Ngenxa yokuthi i-Dongguan Hanxin Plastic Technology Co., Ltd. ithenga ngobuningi futhi idayisa ngqo efektri, amakhasimende agwema izindleko ezengeziwe ezikhula ngokuhweba ngezikhathi eziningi zabalamuli. Izintengo zishicilelwa ngokusobala nemigomo ecacile mayelana nohlobo lwemali, ama-Incoterms, nesikhathi sokusebenza. Ukuhlelwa kokukhiqiza okusheshayo kanye nenethiwekhi yezokuthutha ethembekile kunciphisa isikhathi phakathi kwe-oda lokuthenga nokulayishwa kwesiqukathi. Izixazululo ezenzelwe umthengi ziyatholakala kubathengi abadinga ububanzi obuthile be-melt index, izithasiselo ze-slip noma ze-anti-block, iziqinisi ze-UV, noma i-color masterbatch. Ukusekelwa kobuchwepheshe okugcwele kunikezwa ngesikhathi sokuhlola, futhi amasampula angahlinzekwa ukuze ikhasimende liqinisekise ukusebenza ngaphambi kokuzibophezela kumthamo omkhulu. Umbono obanzi wemindeni yezinto ezitholakalayo ungatholakala ku-Imikhiqizo ikhasi.

I-LDPE ayiwona umkhiqizo owodwa kodwa iwumndeni wamazinga ahlukaniswa ikakhulukazi nge-melt index kanye ne-density. I-melt index, elinganiswa ngamagremu ngemizuzu eyishumi, ikhombisa ukuziphatha kokugeleza: amazinga e-melt index aphansi aqinile futhi afaneleka kangcono kufilimu nokubunjwa ngokufutha, kuyilapho amazinga e-melt index aphezulu egeleza kalula futhi afaneleka ukubunjwa ngokujova kwezindonga ezincane kanye nokumboza. I-density ithinta ukuqina, izakhiwo zokuvimbela, kanye nokucaca, futhi ilawulwa ngesikhathi sokwenziwa kwe-polymerization. Izithasiselo ziqhubeka nokulungisa ukusebenza, kufaka phakathi ama-slip agents okusebenza kwefilimu, ama-anti-block agents ukuvimbela ukunamathela kwezingqimba, ama-antioxidants okuzinza kokushisa, kanye nama-UV stabilizers okuchayeka ngaphandle. Amazinga okuthinta ukudla akhiqizwa ngaphandle kwezinsalela eziyingozi futhi asekelwa imibhalo efanele yokufuduka.

Ifomethi yokupakisha ibaluleke ngokulinganayo ekusebenzeni kahle kwezitshalo. Ukulethwa okujwayelekile kusebenzisa izikhwama zokuluka ezingama-25 kg ezinamalayini angaphakathi ukuze kufakwe ngesandla, kuyilapho izikhwama ezinkulu ezingama-500 kg noma ezingama-1000 kg zifanele izinhlelo zokuhambisa ezizenzakalelayo. Ukulayishwa ngamaloli amakhulu noma ngamakhonteyina kuyatholakala kumakhasimende anenani eliphezulu asebenzisa izinhlelo zama-silo futhi afuna ukunciphisa imfucuza yokupakisha. Ama-pellets ayisilinda noma ayindilinga futhi ayomiswa futhi asuswe uthuli ngaphambi kokufakwa ezikhwameni ukuvimbela ukuxhumana ezitsheni. Ukulebula okwezifiso, ukuphawulwa kwegama langasese, kanye nokupakishwa kwama-pallet ezinhlobo ezixubile kungahlelwa uma kuceliwe. Amakhasimende adinga izici zokugeleza ezithile kakhulu akhuthazwa ukuthi axoxe ngomugqa wawo wokucubungula nethimba lobuchwepheshe lomhlinzeki ngaphambi kokuqeda ukukhetha uhlobo.

Ukupakisha yingxenye enkulu kunazo zonke esetshenziswayo, ehlanganisa ukukhiqizwa kwefilimu, ukwenza izikhwama, ukuhlanganisa, ukumboza nge-extrusion, kanye nokukhiqizwa kwezikhwama eziguquguqukayo. Abaguquli kulo mkhakha ngokuvamile badinga amazinga efilimu acacile kakhulu anamandla aphezulu okushisela ukushisa kanye nokusebenza okungaguquki kokushelela. Imboni yokubumba nge-injection isebenzisa i-LDPE kumakepisi, izivalo, izinto zasendlini, kanye nezingxenye zezimboni lapho ukuthambileka nokumelana namakhemikhali kubalulekile. Ababumba nge-blow molding bathembela kule nto yokwenza amabhodlela okucindezela, amabhodlela e-dropper, kanye neziqukathi zobuchwepheshe. Abakhiqizi bezintambo ngezintambo bayisebenzisa njenge-insulation kanye ne-jacketing yezintambo zamandla aphansi kanye nezintambo zokuxhumana. Lezi zimboni ngayinye zinezingqinamba ezihlukile, futhi ukufanisa izinga nenqubo yisinqumo esisodwa esibaluleke kakhulu sobuchwepheshe umthengi asithathayo.

Ngaphandle kokucutshungulwa kwamapulasitiki okujwayelekile, le nto isekela ezolimo, ezokwakha, ezemoto, kanye nemigqa yokuhlinzeka ngezokwelapha. Abasebenzisi bezolimo badinga ifilimu eqinisa i-UV ekwazi ukumelana nesizini yonke yokukhula ngaphandle kokuqhekeka. Amakhasimende ezokwakha asebenzisa amashidi e-LDPE kanye nezindwangu njengezivikelo zomhwamuko kanye nezingqimba zokuvikela. Abahlinzeki bezemoto bayisebenzisa kumafilimu okuvikela, izindwangu zangaphakathi, kanye namagaskethi. Amakhasimende ezokwelapha kanye nelabhorethri asebenzisa amazinga ahambisana nokungcola emiseleni, ekupakisheni, kanye nezingxenye ezilahlwayo. Amaphrojekthi wamandla asimeme nawo ancike ezingxenyeni zepholima eziqinile, futhi izinhlangano ezisebenza kulo mkhakha zingabuyekeza imiqondo ehlobene efanaIzixazululo zamandla aluhlaza lapho kucaciswa izinto zokwenza.

Ukuqinisekiswa kwekhwalithi kuqala ngaphambi kokuba impahla ifike. Abahlinzeki bayahlolwa ukuze kuqinisekiswe ukungaguquguquki kokukhiqiza, izinqubo zokugcina amadokhumenti, kanye nesimo sesitifiketi, futhi imithombo egunyaziwe kuphela esetshenziswayo ekuhlinzekeni okuvamile. Lapho kufika, iqoqo ngalinye lihlolwa ekungeneni okuhlanganisa inkomba yokuncibilika, ukuminyana, izinga lomswakama, kanye nokuhlolwa kokungcola okufana namachashaza amnyama noma izinhlayiya zangaphandle. Amasampula agciniwe agcinwa isikhathi esinqunyiwe ukuze noma yisiphi isikhalazo sekhasimende siqhathaniswe nereferensi yokuqala. Idatha yokuhlola iqoshwa kusizindalwazi esilandelwayo esixhunywe kunombolo yeqoqo ephrintiwe esikhwameni ngasinye. Lolu hlelo luvumela inkampani ukuthi iphendule imibuzo yobuchwepheshe ngobufakazi hhayi ngokuqagela.

Isithembiso sesevisi sidlulela kude ngale kwendawo yokuthengisa. Iziqinisekiso zama-oda zicacisa izinga, inani, ukupakishwa, intengo, kanye nosuku olulindelekile lokuthunyelwa ukuze okulindelekile kuhambisane kusukela ekuqaleni. Izibuyekezo zokuthunyelwa ezisheshayo zigcina abathengi benolwazi mayelana nesimo sokubhuka, izinombolo zama-container, kanye nokulungela kwemibhalo. Uma kwenzeka inkinga yokucubungula, abasebenzi bezobuchwepheshe basiza ekuhlaziyeni ama-temperature profiles, ukuhlelwa kwezikulufu, kanye nokusebenzisana kwezithako esikhundleni sokumane bathi inkinga ibangelwa i-resin. Ukuxhumana kwangemva kokuthengisa kuphathwa yilowo owayephethe i-oda, okuqinisekisa ukuqhubeka nokuziphendulela. Amakhasimende ancoma leli zinga losekelo avame ukuhlanganisa ukuthenga okunye okokusebenza kumphakeli ofanayo ukuze enze lula isisekelo sawo sabaphakeli.

Ukulungiselela umbuzo onembile kusiza umhlinzeki ukuthi akwazi ukunikeza isilinganiso ngokushesha nangokunembile. Umbuzo owusizo uchaza inqubo ehlosiwe, njenge-blown film, injection molding, noma i-extrusion coating, kanye ne-target melt index, ibanga le-density, izidingo ze-additive, kanye nevolumu yanyanga zonke. Abathengi kufanele futhi basho imbobo yabo yokufika, ama-Incoterms abawathandayo, kanye nanoma yiziphi izidingo zesitifiketi noma imibhalo. Izicelo zamasampula kufanele zicacise inani elidingekayo kanye nenjongo yokuhlola. Uma le datha isitholakele, ithimba lezokuthengisa lingancoma igredidi elihambisanayo futhi liqinisekise ukuthi iyatholakala. Emibuzweni ejwayelekile ngaphambi kombuzo osemthethweni, i-Ikhayaikhasi linikeza umbono jikelele wenkampani kanye neqoqo layo lezinto ezibonakalayo.

Izicelo zokucaphuna ngokuvamile ziphendulwa phakathi kosuku lwebhizinisi elilodwa ngesikhathi sokusebenza esijwayelekile. Izicaphuno ezisemthethweni zifaka intengo, ukupakisha, isikhathi sokuhola, imigomo yokukhokha, kanye nendlela yokuthumela, futhi zihlala zivumelekile isikhathi esishiwo. Abathengi abadinga ukuvakashela isikhungo, bahlole isitoko, noma baxoxe ngesivumelwano sokuhlinzeka isikhathi eside bayamenywa ukuba bahlele isikhathi ngaphambi kwesikhathi. Imininingwane yokuxhumana, imephu yendawo, kanye nefomu lokubuza kuyatholakala ku-Xhumana Nathiikhasi, okwenza kube lula ukuqala ingxoxo. Noma ngabe isidingo siyioda yokulinga eyodwa noma uhlelo lwanyanga zonke oluqhubekayo, ithimba likulungele ukunikeza isiphakamiso esisebenzayo, esizwakalayo kwezohwebo.

I-LDPE iyi-low density polyethylene, i-thermoplastic enegatsha elikhiqizwa ngokuhlanganiswa kwe-ethylene ngengcindezi ephezulu. Amagatsha ayo amade akha ukuminyana okucishe kube phakathi kuka-0.910 no-0.940 g/cm³, okwenza ibe nokuthambile futhi icace ukwedlula i-high density polyethylene. Uma iqhathaniswa ne-linear low density polyethylene, i-LDPE ngokuvamile ayimelani nokubhobozwa kodwa ilula ukuyicubungula futhi ingcono ekushiseleni ukuhlanganisa. Lezi zimo zokwakheka zinquma ukuthi yiluphi uhlobo olufanele ifilimu, ukumboza, noma ukubumba.

Ifilimu yokupakisha iyona ndawo enkulu kakhulu yokusetshenziswa. Ifilimu evuthelwayo iba izikhwama zokuthwala, ama-liner, i-shrink wrap, kanye nezingqimba zokuhlanganisa, kuyilapho ukumboza nge-extrusion kusetshenziswa kupharafini kanye namabhodi ukuze kuvinjwe umswakama. Okunye ukusetshenziswa okubalulekile kuhlanganisa amabhodlela okucindezela, ukufakwa kukagesi kwezintambo, ifilimu yezolimo, kanye nezikepisi nezivalo ezibunjwe nge-injection. Ukukhethwa kohlobo kuncike ekuthambileleni okudingekayo, ukucaca, kanye namandla okuhlanganisa.

Yebo. Amanani amasampula ngokuvamile anikezwa ukuze amakhasimende akwazi ukwenza izivivinyo emishinini yawo ngaphambi kokuzibophezela kumthamo. Ukuze isivivinyo sibe nengqondo, abathengi kufanele bacacise inqubo, i-melt index ehlosiwe, ukuminyana, kanye nezidingo zokungezwa. Impendulo evela esivivinyweni isiza umhlinzeki ukulungisa izinga elinconywayo futhi agweme ukungafani emithwalweni emikhulu.

Inani elincane le-oda lincike ezingeni, efomini lokupakisha, kanye nendawo ekuyiwa kuyo. Ama-oda okulinga angamakhulu ambalwa amakhilogremu avame ukwenzeka ngezinjongo zokuhlola, kuyilapho amanani entengo yobuningi ngokuvamile asebenza kusukela kupalethi egcwele noma ithani elilodwa lokulinganisa kuya phezulu. Amanani omthwalo wamakhonteyina ezikhwameni ezingama-25 kg noma ezikhwameni ezinkulu anikeza izindleko ezingcono kakhulu zeyunithi. I-MOQ eqondile iqinisekiswa esigabeni sesiphakamiso.

Amazinga agciniwe ngokuvamile angalungiselelwa ukuthunyelwa phakathi nezinsuku ezimbalwa zokusebenza, kuyilapho izinhlanganisela zezithako ezenzelwe wena zidinga isikhathi esengeziwe sokuhlanganisa. Ukuhamba ngomkhumbi bese kuncike echwebeni lendawo oya kuyo kanye nezinhlelo zamanje zokuthumela. Umhlinzeki unikeza usuku olulinganiselwe lokulayisha esiqinisekisweni se-oda futhi ukhiphe izibuyekezo uma izinhlelo zishintsha. Ukuhlela kusenesikhathi ngezikhathi zamathemu amaningi kusiza ukugwema ukubambezeleka.

Ukukhiqizwa kwefilimu ngokuvamile kusebenzisa amazinga anenkomba yokuncibilika ephakathi kuka-0.3 no-4 g/10 min, kuye ngobukhulu befilimu obudingekayo nokuzinza kwebhamu. Amazinga anenkomba yokuncibilika ephansi anikeza amandla okuncibilika aphezulu nokuqina, kuyilapho amazinga anenkomba yokuncibilika ephezulu kancane ethuthukisa umkhiqizo nokucaca. Izithako zokushibilika nezokuvimbela ukunamathela zivame ukufakwa ukulawula ukungqubuzana nokuvimbela ukunamathela kwengqimba ngengqimba. Ukukhetha kokugcina kuncike ekuhlelweni komugqa wefilimu ephefumulwayo.

I-LDPE iyasebenza kabusha ngomshini, futhi imfucuza yasembonini ivamise ukugaywa kabusha futhi yenziwe amapellets ukuze isetshenziswe ezinhlelweni ezingabalulekile kakhulu. Ukuqoqwa kwefilimu yangemva kokusetshenziswa kuyanda ezimakethe eziningi, kusekelwa umthetho womthwalo womkhiqizi owengeziwe. Ukuklanywa kwezinto ezingashintshi ezisetshenziswayo kuthuthukisa ukusetshenziswa kabusha ngokugwema izakhiwo ezingafani ezinamazinga amaningi. Ukukhetha i-LDPE esetshenziswa kabusha kusiza amabhrendi ukuthi ahlangabezane nezinjongo zemvelo kanye nezidingo zomthetho.

Imigomo ejwayelekile ngokuvamile ihlanganisa ukudluliswa kwemali ebhange ngediphozithi ngaphambi kokukhiqizwa kanye nensalela ngokumelene namadokhumenti okuthumela, nakuba imigomo ingaxoxisana kubalingani besikhathi eside. Ukuthumela kungahlelwa ngolwandle, ngomoya, noma nge-express courier kuye ngomthamo nokuphuthuma. I-FOB, i-CIF, namanye ama-Incoterms ayasekelwa. Amadokhumenti afana nezitifiketi zokuhlaziya kanye nama-safety data sheets ahambisana nayo yonke into ethunyelwayo.

Iqoqo ngalinye lihlolwa nge-melt index, ukuminyana, umswakama, okuqukethwe komlotha, kanye nekhwalithi yamapellets ebukwayo, futhi imiphumela iqoshwa ngokumelene nenombolo yeqoqo. Amasampuli agciniwe agcinwa ukuze abe yisithenjwa ukuze noma isikhalazo esizayo siphenywe ngokungakhethi. Ubuqotho bokupakisha buhlolwa ngaphambi kokulayisha ukuvimbela ukungena komswakama nokungcola. Lezi zinqubo zigcina impahla engenayo ibikezeleka emgqeni wokukhiqiza womthengi.

Yebo. Ama-slip agents, ama-anti-block agents, ama-antioxidants, ama-UV stabilizers, kanye ne-color masterbatch konke kungafakwa ngokuhambisana nokusetshenziswa. Ukushunwa kubaluleke kakhulu kufilimu yezolimo, amashidi angaphandle, kanye nezinhlanganisela zekhebula okufanele zimelane nengcindezi yemvelo. Abathengi kufanele baqinisekise izimo zokuchayeka ezihlosiwe ukuze kukhethwe uhlelo lwe-stabilizer olulungile. Izindlela zokwakha ezingokwezifiso zidinga isikhathi esifushane sokuthuthukisa nokuqinisekisa.

Inkampani ihlanganisa ukubeka kwentengo okuqondile kwasefektri, ukulawulwa kwekhwalithi okubhaliwe, kanye nokwesekwa kobuchwepheshe okusheshayo ebuhlotsheni obulodwa. Indawo yayo eDongguan inikeza ukufinyelela emachwebeni amakhulu kanye nemboni yokucubungula eminyene, okusekela ukuthunyelwa okusheshayo kanye nosayizi wama-oda aguquguqukayo. Ukulandelelwa kweqoqo, amasampula agciniwe, kanye nemibhalo ecacile kunciphisa ingozi yokuthenga. Kubathengi abafuna umlingani othembekile we-LDPE esikhundleni sokuthengiselana kanye kuphela, lezi zinzuzo ziyakhula ngokuhamba kwesikhathi.