Mabhegi ekuputira anoshatisa, chirevo chacho chinoshatisa, asi mabhegi ekurongedza akapatsanurwa akakamurwa kuva "anoshatisa" uye "anokanganisa zvizere" maviri. Degradable packaging bag inoreva maitiro ekugadzira kuwedzera imwe huwandu hwekuwedzera (senge starch, yakagadziridzwa starch kana imwe cellulose, photosensitizer, biodegradative agent, nezvimwewo), kuitira kuti kugadzikana kwebhegi repurasitiki rekurongedza, uye wobva waenzanisa nyore kushatisa munzvimbo yakasikwa. Bag rekurongedzerwa rinoshatisa zvakazara rinoreva bhegi repurasitiki rekurongedza rakashatiswa zvachose kuita mvura uye kabhoni dhaibhoni. Nzvimbo huru yeiyi yakasvibiswa zvizere inogadziriswa kuita lactic acid, iyo PLA, kubva muchibage uye mufarinya.
Polylactic asidhi (PLA) imhando nyowani yebiological substrate uye inogona kuvandudzwa biodegradable zvinhu. Glucose inowanikwa kubva kune starch raw material ne saccharification, uyezve lactic acid ine hutsanana hwakanyanya inoviriswa kubva kuglucose uye mamwe madhiri, uyezve polylactic acid ine humwe huremu hwemamorekuru inogadzirwa nemakemikari synthesis. Iine biodegradability yakanaka, uye inogona kuderedzwa zvachose nehutachiona muzvisikwa pasi pemamiriro ezvinhu chaiwo mushure mekushandiswa, uye pakupedzisira inobudisa carbon dioxide nemvura. Iyo haisvibise zvakatipoteredza, iyo inobatsira zvikuru kuchengetedzwa kwezvakatipoteredza, uye inochengetedza zvakatipoteredza zvinhu zvevashandi.
Parizvino, iyo huru bio-yakavakirwa zvinhu zvemabhegi ekurongedzeka akaora anoumbwa nePLA + PBAT, iyo inogona kunyungudutswa zvachose mumvura uye carbon dioxide mumwedzi 3-6 pasi pemamiriro ekugadzira composting (60-70 degrees), pasina kusvibiswa. kune zvakatipoteredza. Sei uchiwedzera PBAT, nyanzvi inogadzira yekurongedza inochinjika, pasi pekududzirwa kwekutaura ndeye PBAT adipic acid, 1, 4 - butanediol, terephthalic acid copolymer, yakawandisa izere biodegradable synthetic aliphatic uye anonhuwirira mapolima, PBAT ine yakanakisa kuchinjika, inogona kuita firimu extruding. , kuputika kunze kwekugadzirisa, kuvhara uye kumwe kugadzirisa. Chinangwa chePLA nePBAT musanganiswa ndechekuvandudza kuoma, biodegradation uye kuumba zvivakwa zvePLA. PLA nePBAT hazvienderani, saka mashandiro ePLA anogona kuvandudzwa zvakanyanya nekusarudza vanokodzera vanowirirana.
Nguva yekutumira: Jul-14-2022