Pepa Rakakanyiwa rePE Rine Chepfu Here? Kuongorora Kwakakwana Kwemitemo Yepamutemo Nechokwadi Chesainzi
PE bepa rakanamirwa, inoshandiswa zvakanyanya mukupakata chikafu uye zvinoshandiswa zuva nezuva, yagara ichikwezva kutariswa kukuru kubva kune vatengi maererano nekuchengetedzeka kwayo, mubvunzo mukuru uchitarisa pane “Is Pepa Rakaviriswa rePE “chepfu here?”. Zvichibva pamitemo yenyika nedzemuno pamwe nedata rekuyedza kwehunyanzvi, mhinduro yacho yakajeka: Pepa rakanamirwa nePE rinozadzisa mitemo harikuvadzi muviri wemunhu kana richishandiswa zvakajairika; njodzi dzekuchengetedza dzinogona kungovapo chete kana chigadzirwa chacho chisingateereri mitemo kana kuti chichishandiswa mumamiriro ezvinhu asina kujairika.
Chimiro chikuru chepepa rakanamirwa nePE ndechekuputira polyethylene (PE) layer pachigadziko chepepa kuburikidza nekuita kwekupisa-kunyunguduka. Polyethylene pachayo chinhu chisina kusimba chine hunhu hwakagadzikana hwemakemikari, izvo zvakazivikanwa nemasangano mazhinji ane masimba epasi rose sechinhu chakachengeteka chekubata chikafu. Muyero wenyika weChina weGB/T 36392-2018 “Laminated Paper and Board for Food Packaging” unoratidza zvakajeka kuti kutama kwese kwePE laminated bepa rekudyaKubata kunofanira kuva ≤10 mg/dm², huwandu hwesimbi ine lead (Pb) hunofanira kuva ≤3 mg/kg, cadmium (Cd) ≤0.2 mg/kg, uye hapana zvinhu zvinokuvadza zvakaita semwenje inopenya fluorescent zvinofanirwa kuonekwa. US FDA inotonga zvakasimba zvinhu zvekufukidza zvePE kuti zvibatane nechikafu kuburikidza ne21 CFR 177.1520, ichida kuti huwandu hwezvinhu zvinofamba husvike pamiganhu yekuchengetedza.
Pane zvinhu zviviri zvakakosha zvinokanganisa kuchengetedzeka kwepepa rakaiswa laminated rePE. Chekutanga, kutevedzera zvinodiwa nezvigadzirwa: Pepa rakaiswa laminated rePE rinogadzirwa nevagadziri vasiri pamutemo rinogona kushandisa marara akadzokororwa, zvinhu zvisina kunaka zvePE, kana kuwedzera mapurasitiki asingabvumidzwe akadai sephthalates, izvo zvinoisa njodzi yekufamba kwezvinhu zvinokuvadza. Chechipiri, mamiriro ekushandiswa: Nzvimbo yekunyunguduka kwePE inenge 120-130℃. Kana tembiricha yebasa ikapfuura 110℃ (senge kupisa zvakananga muovheni ye microwave kana kusangana nemoto wakavhurika), kana kana ikasangana nechikafu chine mafuta akawanda kwenguva refu, zvinogona kukurumidzisa kufamba kwezvinhu zvinokuvadza. Data rekutsvagisa rinoratidza kuti kuwedzera kwesimba re microwave nekupisa kunowedzera zvakanyanya mwero wekufamba kwepurasitiki mupepa rakaiswa laminated rePE, nesimba re microwave riine simba rakajeka, izvo zvinogona kuwedzera mwero wekufamba ne20%.
Kuti zvive nechokwadi chekushandiswa zvakachengeteka, vatengi nevatengi vanofanira kutarisisa zvinhu zvitatu: Chekutanga, sarudza zvigadzirwa zvine zvitupa zvekutevedzera mitemo, zvakaita sepepa rakaiswa laminated rePE rakapasa chitupa cheFDA uye rinosangana nezvinodiwa zveGB 4806, uye tarisa mishumo yebvunzo nezvitupa zvekutevedzera mitemo zvinopihwa nemugadziri. Chechipiri, tevera zvinodiwa pakushandisa: dzivisa kupisa chikafu chakaputirwa mupepa rakaiswa laminated rePE muovheni ye microwave, uye usachishandise kuchengetedza chikafu chinopisa zvakanyanya chinodarika 100℃ nguva dzose. Chekupedzisira, tanga nekugadzira zvigadzirwa zvine Pulp yeMhandara yeHuni zvinhu zvepasi uye maitiro ekubvisa marara akavakirwa mumvura, izvo zvisingangove zvakachengeteka zviri nani asiwo zvinoderedza kuburitswa kwemhepo mumhepo uye zvine hushamwari kune nharaunda.
Semupi wemhinduro dzezvigadzirwa zvepepa ane hunyanzvi, Paperjoy’sZvigadzirwa zvepepa zvakarukwa nePE zvinoshandisa zvinhu zvemhando yepamusoro zvePE uye zvinhu zvehuni zvakabvumidzwa neFSC, zvinotevedzera maitiro ekugadzira akachena, zvinopasa zvitupa zvakawanda zvine chiremera zvakaita seFDA neISO9001, uye boka rega rega rezvigadzirwa rine mishumo yakakwana yekuedza kuona kuti zvinoshandiswa zvakachengeteka mumapakeji ezvekudya, zvekudya zvinoshandiswa pakubika nezvimwe zviitiko.
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