Ukuthengwa kwezinto zokupakisha | Indlela yokukhetha iimveliso zepayipi zeplastiki ezikumgangatho ophezulu

Ukukhethwa kunye nomgangatho wezixhobo zezona zinto zibalulekileyo ekuqinisekiseni umgangatho weepayipi, nto leyo eya kuchaphazela ngokuthe ngqo ukucutshungulwa kunye nokusetyenziswa kokugqibela kweepayipi. Izinto zepayipi zeplastiki ziquka i-polyethylene (yomzimba wetyhubhu kunye nentloko yetyhubhu), i-polypropylene (isiciko setyhubhu), i-masterbatch, i-barrier resin, i-inki yokuprinta, i-varnish, njl. Ke ngoko, ukukhethwa kwayo nayiphi na into kuya kuchaphazela ngokuthe ngqo umgangatho wepayipi. Nangona kunjalo, ukukhethwa kwezinto kuxhomekeke kwizinto ezifana neemfuno zococeko, iimpawu zokuthintela (iimfuno zeoksijini, umphunga wamanzi, ukugcinwa kwevumba elimnandi, njl. njl.), kunye nokumelana neekhemikhali.

Ukukhethwa kwemibhobho: Okokuqala, izinto ezisetyenzisiweyo kufuneka zihlangabezane nemigangatho efanelekileyo yococeko, kwaye izinto ezinobungozi ezifana neentsimbi ezinzima kunye nee-fluorescent agents kufuneka zilawulwe ngaphakathi koluhlu olumiselweyo. Umzekelo, kwiipayipi ezithunyelwa eMelika, i-polyethylene (PE) kunye ne-polypropylene (PP) ezisetyenzisiweyo kufuneka zihlangabezane nomgangatho we-US Food and Drug Administration (FDA) 21CFR117.1520.

Iimpawu zomqobo wezinto: Ukuba umxholo wokupakisha kweenkampani zeekhemikhali zemihla ngemihla ziimveliso ezithile ezibuthathaka kakhulu kwioksijini (ezifana nezinye izinto zokuthambisa ezimhlophe) okanye ivumba litshintsha kakhulu (ezifana neeoyile ezibalulekileyo okanye ezinye iioyile, iiasidi, iityuwa kunye nezinye iikhemikhali ezibolayo), kufuneka kusetyenziswe iityhubhu ezidityanisiweyo ezinamalayelo amahlanu ngeli xesha. Ngenxa yokuba ukuvuleka kweoksijini kwityhubhu edityanisiweyo enalayelo amahlanu (i-polyethylene/i-adhesive resin/EVOH/i-adhesive resin/polyethylene) ziiyunithi eziyi-0.2-1.2, ngelixa ukuvuleka kweoksijini kwityhubhu eqhelekileyo ye-polyethylene enye enalayelo liyiyunithi eziyi-150-300. Kwixesha elithile, izinga lokulahlekelwa bubunzima betyhubhu edityanisiweyo equlethe i-ethanol liphantsi kakhulu kunetyhubhu edityanisiweyo. Ukongeza, i-EVOH yi-ethylene-vinyl alcohol copolymer eneempawu zomqobo ezintle kunye nokugcinwa kwevumba (ubukhulu be-15-20 microns yeyona ifanelekileyo).

Ukuqina kwezinto: Iinkampani zeekhemikhali zemihla ngemihla zinemfuno ezahlukeneyo zokuqina kweepayipi, ngoko ke ungayifumana njani ukuqina okufunekayo? I-polyethylene esetyenziswa kakhulu kwiipayipi yi-polyethylene enoxinano oluphantsi, i-polyethylene enoxinano oluphezulu, kunye ne-polyethylene enoxinano oluphantsi oluthe ngqo. Phakathi kwazo, ukuqina kwe-polyethylene enoxinano oluphezulu kungcono kunokwe-polyethylene enoxinano oluphantsi, ngoko ke ukuqina okufunekayo kunokufezekiswa ngokulungelelanisa umlinganiselo we-polyethylene enoxinano oluphezulu/i-polyethylene enoxinano oluphantsi.

Ukumelana neekhemikhali zezinto: I-polyethylene enoxinano oluphezulu inokumelana neekhemikhali okungcono kune-polyethylene enoxinano oluphantsi.

Ukumelana nemozulu kwezinto: Ukulawula ukusebenza kwexesha elifutshane okanye elide kwepayipi, izinto ezifana nenkangeleko, ukumelana noxinzelelo/ukuwa, amandla okutywina, ukumelana nokuqhekeka koxinzelelo lokusingqongileyo (ixabiso le-ESCR), ivumba elimnandi kunye nokulahleka kwezithako ezisebenzayo kufuneka kuqwalaselwe.

Ukukhethwa kwe-masterbatch: I-Masterbatch idlala indima ebalulekileyo kulawulo lomgangatho we-hose. Ke ngoko, xa ukhetha i-masterbatch, inkampani yomsebenzisi kufuneka iqwalasele ukuba ingaba inokusasazeka kakuhle, ukuhluzwa kunye nozinzo lobushushu, ukumelana nemozulu kunye nokumelana nemveliso. Phakathi kwazo, ukumelana nemveliso ye-masterbatch kubaluleke kakhulu ngexesha lokusetyenziswa kwe-hose. Ukuba i-masterbatch ayihambelani nemveliso, umbala we-masterbatch uya kutshintshela kwimveliso, kwaye iziphumo zibi kakhulu. Ke ngoko, iinkampani zeekhemikhali zemihla ngemihla kufuneka zivavanye ukuzinza kweemveliso ezintsha kunye nee-hose (uvavanyo olukhawulezisiweyo phantsi kweemeko ezithile).

Iintlobo zevarnish kunye neempawu zazo: Ivarnish esetyenziswa kwipayipi yahlulwe ngohlobo lwe-UV kunye nohlobo lokomisa ubushushu, kwaye inokwahlulwa ibe ngumphezulu okhanyayo kunye nomphezulu o-matte ngokwembonakalo. Ivarnish ayiboneleli nje kuphela ngemiphumo emihle yokubona, kodwa ikwakhusela umxholo kwaye inefuthe elithile lokuthintela ioksijini, umphunga wamanzi kunye nevumba elimnandi. Ngokubanzi, ivarnish yokomisa ubushushu inamathela kakuhle kwi-hot stamping elandelayo kunye nokuprintwa kwe-silk-screen, ngelixa ivarnish ye-UV ine-gloss engcono. Iinkampani zeekhemikhali zemihla ngemihla zinokukhetha ivarnish efanelekileyo ngokweempawu zeemveliso zazo. Ukongeza, ivarnish evunyiweyo kufuneka ibe nokunamathela okuhle, umphezulu ogudileyo ongenamingxunya, ukumelana nokugoba, ukumelana nokuguguleka, ukumelana nokugqwala, kunye nokungabikho kombala ngexesha lokugcina.

Iimfuno zomzimba wetyhubhu/intloko yetyhubhu: 1. Umphezulu womzimba wetyhubhu kufuneka ube mtyibilizi, ungabi nemiqolo, imikrwelo, ukuxinana, okanye ukuguquka kokuncipha. Umzimba wetyhubhu kufuneka uthe tye kwaye ungagobi. Ubukhulu bodonga lwetyhubhu kufuneka bufane. Ubukhulu bodonga lwetyhubhu, ubude betyhubhu, kunye nokunyamezelana kobubanzi kufuneka kube ngaphakathi koluhlu oluchaziweyo;

2. Intloko yetyhubhu kunye nomzimba wetyhubhu yepayipi kufuneka ziqhagamshelwe ngokuqinileyo, umgca woqhagamshelo kufuneka ucoceke kwaye ube mhle, kwaye ububanzi bufanele bufane. Intloko yetyhubhu akufuneki ijijeke emva koqhagamshelo; 3. Intloko yetyhubhu kunye nesigqubuthelo setyhubhu kufuneka zihambelane kakuhle, zingene ziphume kakuhle, kwaye akufuneki kubekho ukutyibilika ngaphakathi koluhlu lwe-torque oluchaziweyo, kwaye akufuneki kubekho ukuvuza kwamanzi okanye umoya phakathi kwetyhubhu kunye nesigqubuthelo;

Iimfuno zokuprinta: Ukucubungula ipayipi kudla ngokusebenzisa ukuprinta kwe-lithographic offset (OFFSET), kwaye uninzi lwe-inki esetyenziswayo yomiswe yi-UV, nto leyo edla ngokufuna ukunamathela okuqinileyo kunye nokumelana nokutshintsha kombala. Umbala wokuprinta kufuneka ube ngaphakathi kobubanzi obuchaziweyo, indawo yokuprinta ngaphezulu kufuneka ichaneke, ukuphambuka kufanele kube ngaphakathi kwe-0.2mm, kwaye ifonti kufuneka igqibelele kwaye icace.

Iimfuno zeekhaphu zeplastiki: Iikhaphu zeplastiki zihlala zenziwe nge-polypropylene (PP) injection molding. Iikhaphu zeplastiki ezisemgangathweni ophezulu akufuneki zibe nemigca ecacileyo yokushwabana kunye nokukhazimla, imigca yesikhunta egudileyo, ubukhulu obuchanekileyo, kunye nokulingana okuthambileyo nentloko yetyhubhu. Akufanele zibangele umonakalo wesakhiwo njengemifantu ebuthathaka okanye imifantu ngexesha lokusetyenziswa okuqhelekileyo. Umzekelo, xa amandla okuvula engaphakathi, i-flip cap kufuneka ikwazi ukumelana nemifantu engaphezu kwama-300 ngaphandle kokuqhekeka.