Ukuthengwa kwezinto zokupakisha | Indlela yokukhetha imikhiqizo ye-hose yepulasitiki ephezulu

Ukukhethwa kanye nekhwalithi yezinto ezibonakalayo kuyisihluthulelo sokuqinisekisa ikhwalithi yamapayipi, okuzothinta ngokuqondile ukucubungula nokusetshenziswa kokugcina kwamapayipi. Izinto zamapayipi epulasitiki zihlanganisa i-polyethylene (ye-tube body kanye nekhanda le-tube), i-polypropylene (ikhava ye-tube), i-masterbatch, i-barrier resin, inki yokunyathelisa, i-varnish, njll. Ngakho-ke, ukukhethwa kwanoma iyiphi impahla kuzothinta ngqo ikhwalithi ye-hose. Kodwa-ke, ukukhethwa kwezinto ezibonakalayo kuncike nasezicini ezifana nezidingo zenhlanzeko, izakhiwo zokuvimbela (izidingo zomoya-mpilo, umhwamuko wamanzi, ukulondolozwa kwephunga, njll.), kanye nokumelana namakhemikhali.

Ukukhethwa kwamapayipi: Okokuqala, izinto ezisetshenziswayo kufanele zihlangabezane nezindinganiso zokuhlanzeka ezifanele, futhi izinto eziyingozi njengezinsimbi ezisindayo nama-fluorescent agents kufanele zilawulwe ngaphakathi kwebanga elinqunyiwe. Isibonelo, kumapayipi athunyelwa e-United States, i-polyethylene (PE) ne-polypropylene (PP) esetshenzisiwe kufanele ihlangabezane ne-US Food and Drug Administration (FDA) ejwayelekile engu-21CFR117.1520.

Izakhiwo zokuvimbela izinto: Uma okuqukethwe kwezinkampani zamakhemikhali zansuku zonke kuyimikhiqizo ethile ezwela umoya-mpilo ikakhulukazi (njengezinye izimonyo ezibenza babe mhlophe) noma iphunga elimnandi liguquguquka kakhulu (njengamafutha abalulekile noma amanye amafutha, ama-asidi, usawoti kanye amanye amakhemikhali agqwalayo), amashubhu anezingqimba ezinhlanu ezikhishwe ngokuhlanganyela kufanele asetshenziswe ngalesi sikhathi. Ngenxa yokuthi ukufinyeleleka kwe-oksijini kweshubhu elinezingqimba ezinhlanu (i-polyethylene/adhesive resin/EVOH/adhesive resin/polyethylene) ingamayunithi angu-0.2-1.2, kuyilapho ukufinyeleleka kwe-oksijini kweshubhu le-polyethylene elilodwa-layer lingamayunithi angu-150-300. Esikhathini esithile, izinga lokuncipha kwesisindo seshubhu e-co-extruded eliqukethe i-ethanol liphansi izikhathi eziningi kunalelo leshubhu lesendlalelo esisodwa. Ngaphezu kwalokho, i-EVOH iyi-copolymer yotshwala ye-ethylene-vinyl enezindawo ezinhle kakhulu zokuthibela kanye nokugcinwa kwephunga elimnandi (ugqinsi lwama-microns angu-15-20 yilona olufaneleka kakhulu).

Ukuqina kwezinto ezibonakalayo: Izinkampani zamakhemikhali zansuku zonke zinezidingo ezihlukene zokuqina kwamapayipi, ngakho-ke ungakuthola kanjani ukuqina okufunayo? I-polyethylene evame ukusetshenziswa emapayipini ikakhulukazi i-polyethylene enokuminyana okuphansi, i-polyethylene ephezulu, kanye ne-linear low density polyethylene. Phakathi kwazo, ukuqina kwe-polyethylene ephezulu kakhulu kungcono kune-polyethylene ephansi, ngakho-ke ukuqina okufunayo kungafinyelelwa ngokulungisa isilinganiso se-polyethylene / high-density polyethylene.

Ukumelana namakhemikhali okubalulekile: I-polyethylene enobukhulu obuphezulu inokumelana namakhemikhali kangcono kune-polyethylene ephansi.

Ukumelana nesimo sezulu kwezinto: Ukulawula ukusebenza kwepayipi lesikhathi esifushane noma eside, izici ezifana nokubukeka, ukumelana nokucindezela/ukwehla, amandla okuvala, ukumelana nokuqhekeka kokucindezeleka kwemvelo (inani le-ESCR), iphunga nokulahlekelwa izithako ezisebenzayo okumele kucatshangelwe.

Ukukhethwa kwe-masterbatch: I-Masterbatch idlala indima ebalulekile ekulawuleni ikhwalithi yepayipi. Ngakho-ke, lapho ukhetha i-masterbatch, inkampani yomsebenzisi kufanele icabangele ukuthi inokuhlakazeka okuhle, ukuhlunga kanye nokuzinza kokushisa, ukumelana nesimo sezulu kanye nokumelana nomkhiqizo. Phakathi kwabo, ukumelana komkhiqizo we-masterbatch kubaluleke kakhulu ngesikhathi sokusetshenziswa kwe-hose. Uma i-masterbatch ingahambisani nomkhiqizo, umbala we-masterbatch uzothuthela emkhiqizweni, futhi imiphumela iyingozi kakhulu. Ngakho-ke, izinkampani zamakhemikhali zansuku zonke kufanele zihlole ukuzinza kwemikhiqizo emisha namapayipi (ukuhlolwa okusheshisiwe ngaphansi kwezimo ezithile).

Izinhlobo ze-varnish nezici zazo ezihlukene: I-varnish esetshenziswa ku-hose ihlukaniswe ngohlobo lwe-UV kanye nohlobo lokumisa ukushisa, futhi ingahlukaniswa endaweni ekhanyayo kanye ne-matte ebusweni ngokubukeka. I-Varnish ayihlinzeki nje kuphela ngemiphumela emihle yokubuka, kodwa futhi ivikela okuqukethwe futhi inomphumela othile wokuvimbela umoya-mpilo, umhwamuko wamanzi kanye nephunga elimnandi. Ngokuvamile, ukuvanisha okomisa ukushisa kunokunamathela kahle ekugxivizeni okushisayo okulandelayo kanye nokuphrinta kwesikrini sikasilika, kuyilapho ukuvanisha kwe-UV kunokukhanya okungcono. Izinkampani zamakhemikhali zansuku zonke zingakhetha i-varnish efanele ngokuya nezici zemikhiqizo yazo. Ngaphezu kwalokho, i-varnish ephulukisiwe kufanele ibe nokunamathela okuhle, indawo ebushelelezi ngaphandle kokugoba, ukumelana nokugoqa, ukumelana nokugqoka, ukumelana nokugqwala, futhi kungabi nombala ngesikhathi sokugcinwa.

Izidingo zomzimba weshubhu/ikhanda leshubhu: 1. Ingaphezulu lomzimba weshubhu kufanele libe bushelelezi, lingabi nemivimbo, imihuzuko, izinhlungu, noma ukuwohloka kokuncipha. Umzimba weshubhu kufanele uqonde futhi ungagobi. Ubukhulu be-tube wall kufanele bufane. Ukujiya kodonga lweshubhu, ubude beshubhu, nokubekezelelana kobubanzi kufanele kube phakathi kwebanga elishiwo;

2. Ikhanda le-tube kanye nomzimba we-tube we-hose kufanele uxhunywe ngokuqinile, umugqa wokuxhuma kufanele ube ohlanzekile futhi omuhle, futhi ububanzi kufanele bufane. Ikhanda le-tube akufanele liphenduke ngemuva kokuxhuma; 3. Ikhanda leshubhu kanye nesembozo seshubhu kufanele kufane kahle, kugoqe ngaphakathi nangaphandle ngokushelela, futhi akufanele kube khona ukushelela phakathi kwebanga le-torque elishiwo, futhi akufanele kube khona ukuvuza kwamanzi noma komoya phakathi kweshubhu nesembozo;

Izidingo zokuphrinta: Ukucubungula ipayipi kuvame ukusebenzisa ukuphrinta kwe-lithographic offset (OFFSET), futhi iningi likayinki osetshenziswayo owomisiwe nge-UV, ngokuvamile odinga ukunamathela okuqinile nokumelana nokushintsha kombala. Umbala wokuphrinta kufanele ube phakathi kwebanga lokujula elishiwo, indawo yokuphrinta ngaphezulu kufanele ibe nenembile, ukuchezuka kufanele kube ngaphakathi kuka-0.2mm, futhi ifonti kufanele iphelele futhi icace.

Izidingo zamakepisi epulasitiki: Izigqoko zepulasitiki zivame ukwenziwa ngomjovo we-polypropylene (PP). Izigqoko zepulasitiki ezisezingeni eliphezulu akufanele zibe nemigqa eshwabene esobala kanye nokucwayiza, imigqa yesikhunta ebushelelezi, izilinganiso ezinembile, nokulingana okubushelelezi nekhanda leshubhu. Akufanele zidale ukulimala kwesakhiwo njengokuqhekeka okuphukayo noma imifantu ngesikhathi sokusetshenziswa okuvamile. Isibonelo, uma amandla okuvula angaphakathi kwebanga, i-flip cap kufanele ikwazi ukumelana nokugoqa okungaphezu kuka-300 ngaphandle kokuphuka.