I mea e hooloihi ai i ke ola o na mea e like me ka ai a me ka laau lapaau, nuimea paʻino ka meaʻai a me nā lāʻau lapaʻau i kēia mau lā e hoʻohana i nā kiʻiʻoniʻoni composite multi-layer packaging. I kēia manawa, ʻelua, ʻekolu, ʻelima, ʻehiku, ʻeiwa, a he ʻumikūmākahi papa o nā mea hoʻopili hoʻohuihui. He kiʻi ʻoniʻoni ʻoniʻoni ʻoniʻoni ʻoniʻoni i hana ʻia e ka hoʻokuʻu ʻia ʻana o nā mea palaka i loko o nā kahawai he nui i ka manawa like mai ka wehe ʻana hoʻokahi, hiki ke hoʻohana i nā pono o nā mea like ʻole.
ʻO nā papa he nuiʻōwili pahu kiʻiʻoniʻoniʻO ka nui o nā hui polyolefin. I kēia manawa,ʻo nā hale i hoʻohana mauʻia e like me: polyethylene / polyethylene, polyethylene ethylene vinyl acetate copolymer / polypropylene, LDPE / papa hoʻopili / EVOH / papa hoʻopili / LDPE, LDPE / papa hoʻopili / EVH / EVOH / EVOH / papa hoʻopili / LDPE. Hiki ke hoʻololi ʻia ka mānoanoa o kēlā me kēia papa ma o ka ʻenehana extrusion. Ma ka hoʻoponopono ʻana i ka mānoanoa o ka ʻāpana pale a me ka hoʻohana ʻana i nā mea pale like ʻole, hiki ke hoʻolālā ʻia nā kiʻiʻoniʻoni maʻalahi me nā ʻano ʻokoʻa. Hiki ke hoʻololi ʻia a hoʻoponopono ʻia i nā pono o nā ʻeke ʻokoʻa. ʻO kēia multi-layer a me multifunctional packaging composite ka kuhikuhi nui no ka hoʻomohala ʻana i nā mea kiʻi ʻoniʻoni i ka wā e hiki mai ana.
ʻO ka hoʻolālā kiʻiʻoniʻoni hoʻopaʻa paʻa nui
ʻO ke kiʻiʻoniʻoni puʻupuʻu puʻupuʻu lehulehu, me ka nānā ʻole i ka nui o nā papa, ua māhele ʻia i ka papa kumu, ka papa hana, a me ka papa hoʻopili e pili ana i ka hana o kēlā me kēia papa o ke kiʻiʻoniʻoni.
pae kumu
ʻO ka mea maʻamau, ʻo nā ʻāpana o loko a me waho o nā kiʻiʻoniʻoni composite pono e loaʻa i nā ʻano kino kino a me nā ʻano mechanical, e hana ana i ka hana hana, a me ka papa hoʻopaʻa wela. Pono e loaʻa ka hana hoʻopaʻa wela maikaʻi a me ka hana welding wela, he haʻahaʻa ke kumu kūʻai, loaʻa ke kākoʻo maikaʻi a me ka hopena paʻa ma ka papa hana, a loaʻa ka hapa kiʻekiʻe loa i ka kiʻi ʻoniʻoni, e hoʻoholo ana i ka rigidity holoʻokoʻa o ka kiʻi ʻoniʻoni. . ʻO nā mea kumu nui ka PE, PP, EVA, PET, a me PS.
Papa hana
Ka papa hana okiʻi hoʻopaʻa meaʻaiʻO ka hapa nui he papa pale, maʻamau i waenakonu o kahi kiʻiʻoniʻoni multi-layer composite, me ka hoʻohana nui ʻana i nā resins pale e like me EVOH, PVDC, PVA, PA, PET, etc. , a ʻo ka PA maʻamau a me ka PET he mau mea pale like, pili i nā mea pale waena.
EVOH (ethylene vinyl alcohol copolymer)
ʻO Ethylene vinyl alcohol copolymer kahi mea polymer e hoʻohui i ke kaʻina hana o nā ethylene polymers a me nā waiwai pale kinoea o nā polymer alcohol ethylene. He ʻōlinolino maikaʻi loa ia. Loaʻa iā EVOH nā waiwai pale maikaʻi no nā kinoea a me nā aila, me ka ikaika mechanical maikaʻi loa, elasticity, pale pale, pale anuanu, a me ka ikaika o ka ʻili, a me ka hana hoʻoponopono maikaʻi loa. ʻO ka hana pale o EVOH e pili ana i ka maʻiʻo ethylene. Ke piʻi aʻe ka ethylene maʻiʻo, e emi ana ka hana pale kinoea, akā hoʻonui ka hana kūʻē i ka wai, a maʻalahi ke hana.
ʻO nā huahana i hoʻopaʻa ʻia me nā mea EVOH e pili ana i nā mea ʻala, nā huahana waiu, nā huahana ʻiʻo, nā huahana cheese, etc.
PVDC (polyvinylidene chloride)
ʻO ka polyvinylidene chloride (PVDC) he polymer o ka vinylidene chloride (1,1-dichloroethylene). ʻOi aku ka haʻahaʻa o ka mahana decomposition o ka homopolymer PVDC ma mua o kona wahi hoʻoheheʻe, no laila paʻakikī ke hoʻoheheʻe. No laila, ma ke ʻano he mea hoʻopihapiha, ʻo PVDC kahi copolymer o vinylidene chloride a me vinyl chloride, nona ka maikaʻi o ka ea, ka pale ʻana i ka corrosion, ka paʻi maikaʻi a me nā waiwai hoʻopaʻa wela.
I ka wā kahiko, ua hoʻohana nui ʻia no ka ʻeke pūʻali koa. I ka makahiki 1950, ua hoʻomaka ʻia e hoʻohana ʻia ma ke ʻano he kiʻiʻoniʻoni mālama meaʻai, ʻoi aku ka wikiwiki o ka hoʻomohala ʻana o ka ʻenehana hōkeo hou a me ka wikiwiki o ke ola o nā poʻe hou, ka wikiwiki a me ka mālama ʻana i ka pale ʻana, ka huli ʻana o ka microwave cookware, a me ka hoʻonui ʻana i ka meaʻai a ʻO ke ola o ka lāʻau lapaʻau i ʻoi aku ka kaulana o ka noi ʻana o PVDC. Hiki ke hana ʻia ʻo PVDC i nā kiʻiʻoniʻoni ultra-thin, e hōʻemi ana i ka nui o nā mea maka a me nā kumukūʻai hoʻopili. Ke kaulana nei i kēia lā
Papa hoʻopili
Ma muli o ka maikaʻi ʻole o ka pilina ma waena o kekahi mau resins base a me nā resins layer functional, pono e kau i kekahi mau ʻāpana adhesive ma waena o kēia mau papa ʻelua e hana e like me ke kāpili a hana i kahi kiʻiʻoniʻoni i hoʻohui ʻia. Hoʻohana ʻia ka ʻāpana adhesive resin adhesive, i hoʻohana mau ʻia me ka polyolefin i grafted me maleic anhydride a me ka ethylene vinyl acetate copolymer (EVA).
Hoʻopili ʻia nā polyolefin maleic anhydride
Hana ʻia ka maleic anhydride grafted polyolefin ma ke kālai ʻana i ka maleic anhydride ma luna o ka polyethylene ma o ka extrusion reactive, e hoʻolauna ana i nā hui ʻaoʻao polar ma nā kaulahao non-polar. He mea hoʻopili ia ma waena o nā mea polar a me nā mea polar ʻole a hoʻohana mau ʻia i nā kiʻi ʻoniʻoni o nā polyolefins e like me ka polypropylene a me ka nylon.
EVA (ethylene vinyl acetate copolymer)
Hoʻokomo ʻo EVA i ka monomer vinyl acetate i loko o ke kaulahao mole, e hōʻemi ana i ka crystallinity o ka polyethylene a me ka hoʻomaikaʻi ʻana i ka solubility a me ka hana hoʻopihapiha hoʻopihapiha. ʻO nā mea like ʻole o ka ethylene a me ka vinyl acetate i loko o nā mea i hopena i nā noi like ʻole:
① ʻO nā huahana nui o EVA me ka ethylene acetate content ma lalo o 5% he mau mea hoʻopili, nā kiʻiʻoniʻoni, nā uea a me nā kaula, a pēlā aku;
② ʻO nā huahana nui o EVA me kahi ʻano vinyl acetate o 5% ~ 10% he kiʻi ʻoniʻoni elastic, etc.
③ ʻO nā huahana nui o EVA me kahi mea vinyl acetate o 20% ~ 28% he mau mea hoʻoheheʻe wela a me nā huahana uhi;
④ ʻO nā huahana nui o EVA me kahi ʻano vinyl acetate o 5% ~ 45% he kiʻiʻoniʻoni (me nā kiʻi ʻoniʻoni mahiʻai) a me nā pepa, nā huahana i hoʻoheheʻe ʻia, nā huahana foam, etc.
Ka manawa hoʻouna: Jun-12-2024