'Akyɛde a Wontumi Nhu' ma kokoam nkankyee: aduan grade mu coating .

Sɛ nkurɔfoɔ firi paanoo a wɔto wɔ abɔnten ba fie wɔ ahuhuro da a ɛyɛ hyeɛ a, ɛyɛ wɔn su sɛ wɔbɛyi anomdeɛ toa bi afiri frigye mu na woagu fam - enti woawie nkitahodie no ne paint no nkitahodiɛ a wonnim. So woasusuw pɛn sɛ saa ketewa yi betumi, dɛn nti na ebetumi adi dwuma titiriw bi wɔ hwɛ a wɔbɛhwɛ ma aduan ne anonne ayɛ nea ɛyɛ papa no mu, 'secret' no ahintaw wɔ anonne a wonom no toa mu. Nokwarem no, nea ɛte sɛ nea ɛho nhia pii wɔ mu no yɛ adwuma a ɛho hia a ɛne sɛ wɔbɛbɔ nneɛma no ho ban yiye ne nea wɔde di dwuma no akwahosan, yɛ aluminium a wɔde kyekyere nneɛma ho no fã titiriw. Afei, momma yɛnhwehwɛ ahintasɛm a ɛwɔ aluminum can aduan grade coating mu no mu.

Dwumadi titiriw a ɛwɔ aduan mu grade mu a wɔde kata so .

(1) Nneɛma a ɛbɔ ho ban nsɛe .

Aduan a ɛwɔ mu a wɔde kata so no te sɛ nea wode ntade a ano yɛ den a ɛbɔ 'ɛbɔ ho ban ' ma aluminium nkankyee a ɛyɛ den, na esiw nneɛma a ɛwɔ toa no mu no ano yiye sɛ ɛne dade a ɛwɔ toa no mu no nhyia tẽẽ.

Nnuan ne anonne pii, titiriw no, anonne a ɛyɛ asikre, te sɛ anonne a wɔtaa de carbon ayɛ, wɔ saa tebea a ɛyɛ asikre yi mu no, dade a wɔde gu mu no taa yɛ nea nnuru yɛ, ma enti ɛyɛ mmerɛw.

Ɛnam aduane a ɛwɔ mu a wɔde kata so no nti, ɛtumi yɛ akwansideɛ a wotumi de ho to so wɔ nsuo a ɛyɛ acid ne aluminium nkankyee ntam, ɛkwati dadeɛ a ɛyɛ mmerɛw, ɛma aluminum nkotokuo no som nkwa nna yɛ kɛseɛ, na ama wɔahwɛ sɛ adeɛ a ɛwɔ shelf nkwa nna mu no bɛkɔ so akura nneɛma pa a wɔde kyekyere nneɛma mu bere nyinaa.

(2) aduan a wɔbɛma ayɛ yiye .

Aduan ho banbɔ yɛ aduan ne anonne adwuma no nkwa, na aduan a wɔde kata so di dwuma titiriw wɔ mu. Esiw dade ions a efi tank no mu kɔ aduan ne anonne mu no kwan yiye, baabi a sɛ obi di dade a ɛyɛ fĩ bere tenten a, ebetumi de akwahosan ho asiane aba (te sɛ ntini a ɛma ntini no sɛe).

Enti, standard food grade inner coating no ho hia yiye na ama aduan ayɛ yiye. Ebetumi ahwɛ ahu sɛ aduan ne anonne du aduan ho ahobammɔ ho gyinapɛn a emu yɛ den ho wɔ nneɛma a wɔde ma no nyinaa mu, sɛnea ɛbɛyɛ a wɔn a wɔnom no betumi adi aduan a ɛyɛ mmerɛw.

(3) Hwɛ nneɛma a wɔyɛ no dɛ so .

Dade ankasa wɔ nnuru pɔtee bi, mpo dade ne aduan ne anonne a wɔde di dwuma, nso betumi akanyan nnuru bi, na ɛnam so asakra aduan ne anonne dɛ ne ne dɛ.

Wɔ nnuaba mu nsu, kɔfe ne nneɛma afoforo a ɛwɔ flavor ahwehwɛde ahorow ho no, dwuma a aduan mu grade inner coating di no ho hia kɛse. Nneɛma a ɛwɔ mu a ɛyɛ papa no betumi atew dade no ne ade no ntam nkitahodi no ho koraa, ahwɛ ahu sɛ nneɛma a ɛwɔ akyi no rentwitware nneɛma a ɛwɔ akyi no mu, ma enti anonne biara a wɔn a wɔnom no dɛ no yɛ nea ɛyɛ mfitiase de no te sɛ bere a wɔyɛ no ara kwa no, ɛyɛ foforo na ɛma ahoɔden.

Aluminium no adwumayɛ ho ahwehwɛde ahorow no betumi  ayɛ nea ɛwɔ mu .

(a) Adhesion a eye kyɛn so .

Adhesion a ɛda inner coating ne metal surface ntam no yɛ nnyinaso a ɛbɛma wɔatumi ahyɛ aluminum nkotoku no mu yiye. Wɔ aluminium nkotokuo a wɔyɛ mu no, ɛhia sɛ ɛfa akwan a ɛyɛ den a wɔfa so yɛ adwuma te sɛ mfonini, stamp ne hann mu. Sɛnea ɛbɛyɛ a yɛbɛhwɛ sɛ emu ade a wɔde kata so no abata ho yiye no, yebesusuw nnuru a ɛda ade no ne dade, ntam tumi ne nneɛma afoforo ntam no ho yiye bere a yɛrepaw ade a wɔde kata so no. Bere koro no ara mu no, wɔ adeyɛ no mu no, wobedi kan ayɛ dade no ani, te sɛ ahotew, degreasing, passivation, ne nea ɛkeka ho, sɛnea ɛbɛyɛ a dade no ani yɛ mmerɛw na ɛyɛ adwuma yiye, ma abatade a ɛda mu a wɔde kata so ne dade no ntam no yɛ kɛse.

(2) Nsakrae pa .

Yɛde food grade inner coating nneɛma di dwuma, denam formulation design soronko ne process treatment so, a ɛyɛ flexibility a ɛkyɛn so. Saa nneɛma yi betumi agye nhyɛso no yiye na apete bere a wɔreyɛ aluminium nkankyee no, na ahwɛ ahu sɛ nea ɛwɔ mu no betumi akɔ so ayɛ nea ɛte sɛ nea ɛwɔ tebea horow a ɛyɛ den a ɛyɛ den mu, na ɛde ahobammɔ a wotumi de ho to so ama nkankyee.

(3) Nnuru a ɛyɛ den a ɛkyɛn so .

Aduan ne anonne ahorow wɔ nnuru ahorow, aluminum betumi ayɛ mu ade a ɛkata so no wɔ nnuru a ɛyɛ den yiye, ma ɛyɛ acidic anonne, te sɛ carbonated drinks, carbolic acid wɔ carbonated drinks mu, nnuaba mu acid a ɛwɔ nnuaba nsu mu, wɔ acid a ɛyɛ den, bere tenten a wɔde di nkitaho ne nea ɛwɔ mu no betumi ama nneɛma a ɛwɔ mu no asɛe anaasɛ ɛbɛma nneɛma a ɛwɔ mu no ayɛ nea ɛyɛ papa ne ahobammɔ. Enti, ɛsɛ sɛ emu ade a wɔde kata so no tumi gyina sɛnea nneɛma a acid wom no nsɛe no ano.

Sɛ wopɛ aduan ne anonne a ngo wom, te sɛ nufusu, kɔfe a wɔnom, ne nea ɛkeka ho a, ɛsɛ sɛ nea ɛwɔ mu no tumi gyina ngo ano yiye, srade betumi akɔ mu akɔhyɛ mu, asesa nneɛma a ɛwɔ mu a ɛwɔ mu no, na ɛtew ne tumi a ɛko tia nsu no so. Nea ɛka ho no, aduan ne anonne bi nso betumi ayɛ nneɛma a wɔde siesie aduan, nneɛma a ɛma ɛyɛ fɛ, nnuhuam ne nneɛma afoforo a wɔde ka ho, saa nnuru yi nso betumi anya nkɛntɛnso soronko wɔ nea wɔde kata so no so.

Yɛn aduan grade mu coatings no kɔ sɔhwɛ ne nhwehwɛmu a emu yɛ den mu de ko tia nnuru a wɔtaa de di dwuma ntua no yiye, hwɛ hu sɛ ɛyɛ adwuma yiye wɔ nneɛma a wɔyɛ no mu mmeae ahorow na ɛma ahobammɔ a ɛtra hɔ daa ma can packaging.

Nneɛma a wɔtaa de yɛ aluminum a wɔde  kata so .

Nneɛma ahorow a wɔde kata so a wɔpaw no gyina sɛnea nneɛma a ɛwɔ mu no te so (sɛ nhwɛso no, acidity, asikre), ɔkwan a wɔfa so yɛ (sɛ́ ɛyɛ ɔhyew a ɛkɔ soro a wɔde sterilization di dwuma) ne nneɛma a atwa yɛn ho ahyia a wɔhwehwɛ (sɛ nhwɛso no, nsu a wɔde kata so no yɛ nea ɛnyɛ nea atwa yɛn ho ahyia ho asɛm kɛse). Wɔde epoxy resin na ɛyɛ aluminium nkotoku abien no mu dodow no ara.

1. Epoxy resin based coating ‌: Ɛwɔ adwumayɛ a ɛkɔ akyiri yiye, adwumayɛ pa, betumi ayɛ wɔ cans a wɔyɛ no mu, a ɛyɛ mmerɛw denam akwan horow a ɛyɛ den a wɔfa so yɛ adwuma a epoxy resin yɛ ade titiriw sɛ ade titiriw, nsu a wɔde bɔ nneɛma a atwa yɛn ho ahyia ho banbɔ, a ɛnyɛ awuduru a ɛnyɛ dɛ, acid a ɛyɛ den a ɛko tia a ɛyɛ den a ɛte saa no mu no, wobetumi asiw ano aduru a wɔde di dwuma wɔ nsu mu no ho, wɔde anom aduru no di dwuma titiriw Beer ne nsã a wɔde carbon ayɛ.

2. Acrylic Modified Epoxy Coating ‐: Acrylic resin ne epoxy resin graft polymerization a ɛka bom ma adhesion ne corrosion resistance tu mpɔn, a ɛfata ma Type D /I beer cans ne soft drink cans .

Esiane nyansahu ne mfiridwuma ho nkɔso a ɛkɔ so daa ne nnipa ahwehwɛde a ɛrekɔ soro a ɛfa aduan a ahobammɔ ne nneɛma a atwa yɛn ho ahyia ho banbɔ ho nti, nneɛma foforo anaa soronko bi a ɛwɔ mu a wɔde kata so nso reba. Sɛ nhwɛso no, epoxy resin a wɔayɛ no foforo a wɔde nsu ayɛ a wɔde nsu di dwuma sɛ aduru a wɔde yɛ nneɛma a wɔde yɛ nneɛma a atwa yɛn ho ahyia ho banbɔ ne awuduru a ɛba fam, a ɛne mprempren nkɔso a ɛwɔ nneɛma a atwa yɛn ho ahyia ho banbɔ mu no hyia. Saa ade a wɔde kata so yi a ɛne beer, nsã a wɔde carbon ayɛ, tii anom, kɔfe ne ahoɔden ne agumadi mu anonne a ɛwɔ aluminum abien-afã nyinaa mu no di nkitaho tẽẽ no fa ɔfasu a ɛyɛ adwuma yiye, nkakrankakra twee adwene ne anim dom wɔ gua no so.

Nneɛma bi nso wɔ hɔ a wɔde kata so a ɛwɔ dwumadi soronko, te sɛ nneɛma a wɔde kata so a ɛwɔ tumi a ɛko tia mmoawa, a ebetumi asiw mmoawa nketenkete a wɔwɔ tank no mu no nyin ne wɔn awo ano na ama aduan ne anonne a wɔde sie no atra hɔ bio; Nneɛma a ɛwɔ mu a ɛwɔ akwansideɛ a ɛkorɔn no bɛtumi asiw oxygen, nsuo ne nneɛma foforɔ a ɛwɔ akyi no nkɛntɛnsoɔ yie wɔ aduane ne anonneɛ so, na akura nneɛma a ɛyɛ foforɔ ne ne su mu. Ɛwom sɛ nneɛma foforo a ɛwɔ mu a wɔde kata so yi a wɔde di dwuma no yɛ ketewaa bi mprempren de, nanso egyina hɔ ma nneɛma a wɔde kata nneɛma a wɔde kata so no nkɔso kwan daakye, na wɔhwɛ kwan sɛ wɔde bedi dwuma kɛse daakye bere a mfiridwuma ne ɛka a wɔbɛtew so no kɔ so yɛ kɛse no.

Nnwumayɛbea gyinapɛn ne mmara a ɛfa aluminum nkankyee a wɔde kata so ho .

(1) Ɔman no mu gyinapɛn ahorow .

Wɔ China no, sɛnea ɛbɛyɛ na wɔahwɛ ahu sɛ aduan a wɔde aluminum nkankyee ayɛ no mu no yɛ papa na ahobammɔ wom no, ɔman no gyinapɛn ne mmara a ɛyɛ katee a ɛtoatoa so ba wɔ abakɔsɛm mu bere no mu.

Wɔn mu no, GB 4806.10-2016 'National Standard for Food Safety Food Contact Coatings and Coatings' yɛ gyinapɛn titiriw a ɛho hia, a ɛyɛ nhyehyɛe a emu da hɔ wɔ mfitiase ahwehwɛde ahorow, mfiridwuma mu ahwehwɛde ahorow, akwan a wɔfa so hwɛ nneɛma ne nneɛma afoforo a ɛfa aduan a wɔde kata so ne nea wɔde kata so ho, a ɛkata nneɛma a wɔde kata aduan so a aluminium ka ho no nyinaa so. Wɔde gyinapɛn ne akwankyerɛ a wɔtaa de ma no ama nnwuma no nyinaa.

GB 11677-2012 'National Standard for Food Safety, nsuo a egyina epoxy resin coating so wɔ mu ɔfasuo a ɛwɔ nkankyee mu' no ayɛ gyinapɛn soronko ama nsuo a egyina epoxy resin coating a wɔde di dwuma wɔ cans a ɛwɔ mu no so. Gyinapɛn no kyerɛ baabi a wɔde nneɛma a wɔde kata so no di dwuma ne mfiridwuma ho ahwehwɛde ahorow no kɔ akyiri. Wɔ mfiridwuma mu ahwehwɛde ahorow ho no, wɔde gyinapɛn ahorow a emu yɛ den asi hɔ ama kɔla ne hyerɛn a ɛwɔ ade a wɔde kata so, nea wɔde kata so no adwumayɛ ne nea ɛfa ho a ɛkyerɛ nsu a wɔde kata so no ho, de hwɛ hu sɛ epoxy resin a wɔayɛ no foforo a wɔde akata so no betumi adi nea wɔhwehwɛ wɔ aduan a ahobammɔ wom ne nneɛma a wɔde siw ano a wɔde siw ano no ho bere a wɔde di dwuma wɔ aluminium nsuhina no mu ɔfasu no mu no.

(2) Amanaman ntam gyinapɛn ahorow .

Wɔ amanaman ntam no, European Union’s Food Contact Material Regulation System ne United States Food and Drug Administration (FDA) no mu nsɛm a ɛfa ho no wɔ nkɛntɛnso kɛse wɔ can ahorow a wɔde kata aduan so no mu. EU Mmara a ɛfa nneɛma a wɔde di nkitaho a ɛfa aduan ho no wɔ nhyehyɛe a emu yɛ den na ɛkɔ akyiri wɔ nneɛma a wɔde di nkitaho no ahobammɔ ne akwantu anohyeto ho, na ɛka nneɛma ahorow a ebetumi ne nnuan adi nkitaho, a nneɛma a wɔde kata nneɛma so a ɛwɔ nkankyee mu no ka ho. Ɛkyerɛkyerɛ nnuru ahorow ahorow a ɛwɔ aduan a wɔde di nkitaho mu no mu pefee.

Sɛ yɛn man no hyehyɛ gyinapɛn a ɛwɔ aduan mu wɔ can ahorow no mu a, yɛde nsi sua fi amanaman ntam gyinapɛn ne osuahu a ɛkɔ anim no mu, na yɛbɔ mmɔden sɛ ɛne amanaman ntam gyinapɛn ahorow hyia. Wɔ index atitiriw bi ne mfiridwuma ho ahwehwɛde ahorow mu no, yɛn man gyinapɛn no adu anaasɛ ɛbɛn amanaman ntam nkɔso.

Awie

Sɛ́ ade titiriw a ɛwɔ aluminium a wɔde kyekyere nneɛma mu no, aduan a ɛwɔ mu a wɔde kata so no di dwuma titiriw a wontumi nsi ananmu wɔ corrosion ano a wosiw, aduan a ahobammɔ wom ne nneɛma a wɔyɛ no dɛ a wɔhwɛ so no mu. Ɛnyɛ sɛ ɛyɛ ahotoso a ɛho hia ma can ahorow no yiye nko, na mmom ɛyɛ ahotoso bridge a ɛka adetɔfo ne nnuan ne anonne ho nnwuma bom nso.

Esiane sɛ wɔn a wɔde di dwuma wɔ aduan ho banbɔ ne nneɛma a atwa yɛn ho ahyia ho banbɔ mu no renya nkɔanim nti, nnwuma a wɔde nneɛma a wɔde kata aduan mu a ɛwɔ mu no nso yɛ foforo bere nyinaa na ɛrenya nkɔso. Daakye no, wɔbɛyɛ nneɛma a wɔde kata so no wɔ akwan a ɛbɛma wɔabɔ nneɛma a atwa yɛn ho ahyia ho ban kɛse na wɔayɛ no yiye, na ɔkwan a wɔfa so yɛ no bɛyɛ nea nyansa wom kɛse na wɔayɛ no yiye na ama wɔadi gua so ahiade a ɛresakra no ho dwuma.

Sɛ́ obi a ɔde aluminium nkankyee ma no, yɛbɛbata nneɛma a ɛyɛ papa no ase bere nyinaa, bere nyinaa yɛama sika a wɔde hyɛ nhwehwɛmu ne nkɔso mu no akɔ soro, ama mfiridwuma ho nimdeɛ a wɔde yɛ nneɛma no atu mpɔn, adi nnwuma gyinapɛn ne mmara so koraa, ama adetɔfo anya nneɛma a ɛyɛ papa na ahobammɔ wom.