Polyethylene terephthalate (PET) yɛ plastic bi a wɔde di dwuma kɛse wɔ nnuan a wɔde kyekyere nneɛma mu. Nea agye din no fi sɛnea ɛyɛ nea ɛda adi pefee, ahoɔden, ne akwanside a ɛkyɛn so, na ɛma ɛyɛ ade a eye ma nnuan ahorow a wɔde kyekyere nneɛma. Nanso so PET yɛ aduan-grade plastic ankasa? Saa asɛm yi bɛhwehwɛ PET su, ne dwumadie wɔ nnuan a wɔde kyekyere nneɛma mu, na ahwɛ sɛ ɛdi gyinapɛn a ɛfa aduane-grade plastics ho anaa. Bio nso, yɛbɛhwehwɛ PET nnaka ahodoɔ a wɔde kyekyere nneɛma a wɔde di dwuma wɔ adwumayɛ mu no mu.
PET Nsɛm no ho ntease
PET yɛ thermoplastic polymer resin a ɛka polyester abusua no ho. Wɔde di dwuma kɛse wɔ ntade nhama, nsu ne nnuan nkuku, ne thermoforming a wɔyɛ mu. Ne nnuru nhyehyɛe no yɛ ethylene terephthalate units a wɔsan yɛ bio, a ɛma PET nya su soronko te sɛ ahoɔden a ɛkorɔn, ɔhyew a ɛyɛ den ne gas akwanside su a eye kyɛn so. Saa nneɛma yi ma PET yɛ nea eye ma nneɛma a wɔde kyekyere nneɛma, titiriw wɔ nnuan adwumayɛ mu, baabi a aduan a wɔbɛma ayɛ foforo na wɔatrɛw bere a wɔde sie no ho hia kɛse.
Nneɛma a ɛwɔ PET mu
Wonim PET sɛ ɛyɛ nea ɛda adi pefee, na ɛma adetɔfo tumi hu ade no denam nea wɔde ahyɛ mu no so, na ɛyɛ su a wɔpɛ ma nnuan pii. Ɛsan nso wɔ ahoɔden-ne-mu duru a ɛkorɔn, na ɛma ɛyɛ den na emu yɛ hare. Nea ɛka ho no, PET wɔ tumi a ɛko tia mmoawa na ɛne aduan ntumi nyɛ adwuma, na ɛno ho hia kɛse na ama wɔahwɛ ahu sɛ aduan no yɛ nea ahobammɔ wom. Oxygen ne carbon dioxide akwanside a eye kyɛn so no ma ɛfata sɛ wɔkyekyere anonne a carbon wom ne nnuan afoforo a ɛporɔw.
Ahobammɔ ne Mmara a Wɔde Yɛ Adwuma
PET ahobanbɔ sɛ aduane-grade ade no, mmarahyɛ bagua ahorow pii a ɛwɔ wiase nyinaa na ɛboa, a U.S. Aduan ne Nnuru Dwumadibea (FDA) ne Europa Aduan Ahobammɔ Dwumadibea (EFSA) ka ho. Saa nnwumakuw yi hwehwɛɛ PET mu na wohui sɛ asiane biara nni ho sɛ wɔde bedi dwuma wɔ nneɛma a wɔde di dwuma wɔ aduan mu. Sɛ nhwɛso no, FDA apene so sɛ wɔbɛsan de PET adi dwuma wɔ nnuan a wɔde kyekyere nneɛma mu, sɛ ɛne ahotew gyinapɛn pɔtee bi hyia a. Saa gye a wogye tom yi gyina nyansahu mu nhwehwɛmu ne sɔhwɛ a ɛkɔ akyiri a ada no adi sɛ PET gyina pintinn ne sɛnea ɛnyɛ-adwuma a ɛne aduan mu nneɛma ntumi nyɛ adwuma so.
PET a wɔde di dwuma wɔ Aduan a Wɔde Gu Nneɛma Mu
Wɔde PET di dwuma kɛse wɔ nnuan a wɔde kyekyere nneɛma mu esiane sɛnea ɛyɛ adwuma pii na ɛyɛ adwuma yiye nti. Wɔtaa de di dwuma wɔ anonne nkotoku, nkuku a wɔde yɛ nneɛma a wɔde yɛ aduan, ne nnuan tray a wɔasiesie-sɛ -didi mu. Bio nso, wɔde PET nso yɛ aduane-grade PET nnaka a wɔde kyekyere nneɛma ho de di aduane adwuma no afã ahodoɔ ahiadeɛ ho dwuma.
Wɔayɛ PET nnaka a wɔde paanoo paanoo no titiriw sɛ wɔmfa nkyekyere nneɛma a wɔato. Sɛnea ɛda adi pefee no ma adetɔfo hu ade no pefee, bere a n’ahoɔden hwɛ hu sɛ nneɛma a wɔde ahyɛ mu no tumi gyina sɛnea wɔde di dwuma bere a wɔde rekɔ na wɔde rekyerɛ no ano. PET paanoo nnaka nso wɔ nsuo-adanseɛ ne ngo-adanseɛ su, a ɛboa ma nneɛma a wɔato no yɛ foforɔ na ɛyɛ papa.
Wɔde PET nnuan nnaka na ɛkyekyere nnuan ahorow ahorow, efi nnuaba ne nnuaba a ayow so kosi ɛmo a wɔayam ne kukisi so. Saa nnaka yi siw nsu ne mframa pa ano yiye, na ɛno na ɛho hia kɛse na ama wɔasiw ɔsɛe ano na ama nnuan a wɔde di agoru no ayɛ mmerɛw na ayɛ dɛ. PET su a emu yɛ hare nso ma ɛyɛ nea eye ma nnuan a wɔde kyekyere nneɛma a wotumi fa so.
PET nhabannuru nnaka a wɔde kyekyere nneɛma ho no ma wonya mfaso kɛse ma nneɛma a wɔayɛ no foforo. Sɛnea PET yɛ no pefee no ma adetɔfo tumi hwɛ sɛnea nhabannuru yɛ foforo a wonbue nea wɔde ahyɛ mu no. Bio nso, wobetumi ayɛ PET no nsusuwii ne akɛse ahorow, na ama ayɛ nea ɛfata sɛ wɔde kyekyere nhabannuru ahorow, efi nhaban momono so kosi ntini nhabannuru so.
Ɛsɛ sɛ wɔde nneɛma a ebetumi agyina ɔhyew a ɛba fam ano na asiw efĩ ano yiye na ɛyɛ nam a wɔde kyekyere nneɛma ho. Wɔayɛ PET nam a wɔde kyekyere nneɛma ho nnaka sɛnea ɛbɛyɛ a wobedi saa ahwehwɛde ahorow yi ho dwuma, na ɛbɔ nam a wɔayɛ no foforo ne nea wɔayɛ ho adwuma nyinaa ho ban yiye. Nneɛma no ahoɔden ne sɛnea ɛda adi pefee no hwɛ hu sɛ wɔbɔ ade no ho ban yiye na ɛtwetwe adetɔfo adwene.
Nneɛma a Atwa Yɛn Ho Ahyia Ho Nsusuwii
Wɔ mfaso a ɛwɔ so wɔ adwumayɛ mu akyi no, wɔpɛ PET nso esiane nneɛma a atwa yɛn ho ahyia nti. Ɛyɛ 100% a wotumi san de di dwuma, na ɔkwan a wɔfa so san de di dwuma no betumi atew carbon footprint a ɛfa nea wɔyɛ-ho no so kɛse. Wɔde PET a wɔasan de adi dwuma (rPET) redi dwuma kɛse wɔ nnuan a wɔde kyekyere nneɛma ho adwumayɛ mu, na ɛma wonya ɔkwan foforo a ɛbɛkɔ so atra hɔ daa a wɔde besi PET a ɛnyɛ ɔbaabun ananmu. Ɛnyɛ sɛ rPET a wɔde di dwuma no ma wɔkora nneɛma so nko, na mmom ɛtew plastic nwura dodow a ɛkɔ awiei wɔ mmeae a wɔtow nneɛma gu no so.
Nneɛma a Wɔsan De Di Dwuma ne Nneɛma a Ɛkɔ So Daa
PET a wɔsan de di dwuma no yɛ adeyɛ a wɔde asi hɔ yie a ɛka ho ne sɛ wɔbɛboaboa ano, wɔbɛhyehyɛ, wɔasiesie, na wɔasan ayɛ ho adwuma de awieeɛ koraa no wɔayɛ nneɛma foforɔ. Saa closed-loop nhyehyɛe yi boa ma nneɛma a atwa yɛn ho ahyia no so tew na ɛboa sikasɛm a ɛyɛ kurukuruwa no. Mprempren nnwumakuw pii de nneɛma a wɔasan de adi dwuma reka wɔn PET nneɛma a wɔde kyekyere nneɛma ho, na ɛnyɛ sɛ ɛma wɔn adwene a ɛfa nneɛma a ɛbɛkɔ so atra hɔ daa ho no yɛ kɛse nko, na mmom ɛma adetɔfo hwehwɛ nneɛma a ɛmma nneɛma a atwa yɛn ho ahyia no nso.
Awie
Sɛ yɛde rewie a, PET yɛ plastic a ɛyɛ aduane-grade ampa a mfasoɔ pii wɔ so wɔ aduane a wɔde kyekyere nneɛma mu. Ahobammɔ, sɛnea ɛyɛ adwuma wɔ mmeae pii, ne mfaso a ɛwɔ so wɔ nneɛma a atwa yɛn ho ahyia ho no ma ɛyɛ nea wɔn a wɔyɛ ne wɔn a wɔde di dwuma no paw sen biara. PET nnaka ahorow a wɔde kyekyere nneɛma te sɛ PET nnuan nnaka ne PET nam nnaka, di nnuan adwumayɛfo ahiade ahorow ho dwuma, na ɛhwɛ hu sɛ nneɛma no kɔ so yɛ foforo, ahobammɔ wom, na ɛyɛ nea adetɔfo ani gye ho. Bere a nnwuma no kɔ so nya nkɔso no, wɔhwɛ kwan sɛ PET bedi dwuma kɛse mpo wɔ nneɛma a wɔde kyekyere nneɛma ho ano aduru a ɛbɛkɔ so atra hɔ daa mu, na ɛnam so ama ne gyinabea sɛ ade titiriw wɔ nnuan a wɔde kyekyere nneɛma mu no mu ayɛ den bio.
