PP / PE / PA / PETG / EVOH Multilayer Barrier Sheet Co-extrusion Line
ʻĀpana ʻenehana nui
| Ke hoʻohālike laina | Hoʻohālike extruder | Laulā huahana | Mānoanoa huahana | Hoʻolālā extrusion pukana |
| 7 papa co-extrusion | 120/75/50/60/75 | 800-1200mm | 0.2-0.5mm | 500-600kg/h |
| 9 papa co-extrusion | 75/100/60/65/50/75/75 | 800-1200mm | 0.05-0.5mm | 700-800kg/h |
Nānā: Hiki ke hoʻololi i nā kikoʻī me ka ʻole o ka hoʻolaha mua.
ʻO ke kūlana mākeke o nā palapala hoʻopihapiha EVOH
Ma ke kahua o ke kaulahao meaʻai meaʻai, ua hoʻohana ka poʻe i nā mea metala a i ʻole nā mea aniani e like me ka ʻeke meaʻai e hoʻokaʻawale pono ai i ke komo ʻana o nā ʻāpana kinoea like ʻole i loko a i waho e hōʻoia i ka maikaʻi o nā mea a me ka waiwai waiwai.No ka mea, ʻekolu mau kumu nui e hoʻopōʻino ai i ka meaʻai: nā kumu ola (biological enzyme reactions, etc.), nā mea kemika (ka nui o ka oxidation o nā mea meaʻai) a me nā kumu kino (hygroscopic, drying, etc.).He kuleana ko kēia mau mea i nā kūlana kaiapuni e like me ka oxygen, ka māmā, ka mahana, ka makū, a me nā mea ʻē aʻe, ka mea e hoʻopau ai i ka meaʻai.ʻO ka pale ʻana i ka pōʻino o ka meaʻai ʻo ia ka mea e pale ai i ka hoʻonui ʻana o nā microorganism i ka meaʻai, pale i ka oxidation o nā ʻāpana meaʻai e ka oxygen, a pale i ka makū a mālama i ka ʻono mua o ka meaʻai.
ʻO Ethylene-vinyl alcohol copolymer, i kapa ʻia ʻo EVOH, ua ʻike ʻia ʻo ia ʻekolu mau pale pale nui loa o ka honua me ka polyvinylidene chloride (PVDC) a me ka polyamide (PA) [2].Hiki i ka EVOH ke pale nui i ka komo ʻana o ka oxygen i ka lewa i loko o ka meaʻai, no laila ke keʻakeʻa nei i ka hana ʻana o nā mea ʻawaʻawa a me nā mea ʻino ʻē aʻe ma muli o ka hoʻonui ʻana o nā microorganisms, a hiki nō hoʻi ke pale i ka hoʻololi ʻana i ka hoʻohui ʻia e ka oxidation, ʻoiai e mālama ana i ka ʻala a me ka pale ʻana i ka pollution o waho.Eia kekahi, hiki ke hoʻopaʻi ʻia ka nele o nā mea pale pale e nā papa polyolefin ʻē aʻe.No laila, hiki i ka EVOH multilayer packaging material ke pale maikaʻi i ka pōʻino o ka meaʻai a hoʻolōʻihi i ke ola.Eia kekahi, maʻalahi ka hana a me ke ʻano, a maikaʻi ka hana hoʻomalu kaiapuni.Ma muli o ka maikaʻi o ke kinoea paʻa waiwai, transparency, processability and solvent resistance of EVOH resin, ke ulu nui nei kāna mau noi noi, a ke ulu wikiwiki nei ka noi.
Palena kiʻekiʻe EVOH resin
1. Mea waiwai
ʻO nā mea pale o EVOH ʻO nā mea pale o nā mea polymer e pili ana i ka hiki ke pale aku i nā huahana i nā kinoea mole liʻiliʻi, nā wai, nā wai wai, a me nā mea ʻē aʻe. a me PET.
2. Ke hoʻohana ʻia ʻo EVOH ma ke ʻano he mea pale kiʻekiʻe, ʻo ia ka mea maʻamau i ka hoʻokumu ʻana i kahi hoʻolālā multi-layer composite.ʻO nā mea hoʻohui maʻamau i hoʻohana ʻia: PP, HIPS, PE, EVOH, AD, a me AD ka mea hoʻopili i ka hale.Hiki i ka multi-layer composite structure ke hāʻawi i ka pāʻani piha i nā waiwai o kēlā me kēia mea, hoʻomaikaʻi i ke kūpaʻa wai o EVOH, a loaʻa i kahi mea pale kiʻekiʻe me nā waiwai piha maikaʻi loa.ʻO ka hapa nui o ia mau mea i hoʻohana ʻia i loko o ka hoʻopili maʻalahi i ka wā ma mua, akā ʻo nā resins composite e like me PP, PE, a me PA ʻaʻole maʻalahi ke kuʻi ma muli o ko lākou paʻakikī maikaʻi a me ka paʻa ʻole o ka rigidity, e kaupalena ana i kā lākou noi ʻana ma ke kahua o ka paʻi paʻa, ʻoi aku hoʻi i loko. nā huahana hoʻopiha pūnaewele.ʻO ka polystyrene HIPS hiki i ka hopena maikaʻi ka rigidity a me nā waiwai hoʻoheheʻe maikaʻi, kūpono no ke kuʻi ʻana a kūpono i nā mea paʻa paʻa.No laila, he mea koʻikoʻi loa ia e hoʻomohala ikaika i ka EVOH kiʻekiʻe-pale composite mea kūpono no ka paʻa paʻa.
Ma muli o ka hoʻohālikelike maikaʻi ʻole ma waena o ka resin EVOH a me ka resin HIPS, a me ka ʻokoʻa nui o ka resin rheology rate, ka ikaika hoʻopaʻa ma waena o ka substrate a me EVOH, nā koi no nā waiwai tensile o EVOH i ka wā hoʻoheheʻe lua, a me ka hāʻawi ʻana o ka papa EVOH i ka wā calendering hana i nā pepa hui ʻia ʻO ka like ʻole o nā mea i hoʻohui ʻia ʻo ia nā pilikia nui e pili ana i ka hana a me ka hoʻohana ʻana i nā mea i hoʻohui ʻia, a he mau pilikia paʻakikī hoʻi e pono ke hoʻoholo ʻia i ka wā e hana ana i kēia ʻano mea hana.
ʻO ke kī i ka ʻenehana co-extrusion multi-layer ʻo ia ka adhesive (AD).Hoʻokomo pinepine ʻia ka PPEVOH i nā mea hoʻopihapiha hoʻopihapiha o EVOH, akā ʻaʻole hiki ke hoʻopaʻa ʻia me ka thermally ʻo PP a me EVOH, a pono e hoʻohui ʻia kahi adhesive (AD) ma waena o PP a me EVOH.I ke koho ʻana i ka mea hoʻopili, pono e noʻonoʻo i ka hoʻopili ʻana o PP ma ke ʻano he kumu kumu, ʻo ka lua ka hoʻohālikelike ʻana i ka melt viscosity o PP a me EVOH, a ʻo ke kolu ka koi o nā waiwai tensile, i mea e pale aku ai i ka delamination i ka wā lua. hana ʻana.No laila, ʻo ka nui o nā ʻāpana co-extruded he ʻelima-layer co-extruded sheets (PPADEVOHADPP)./AD/EVOH/AD/R/PP, ʻo ka papa waho loa he PP mea hou, a ʻo nā papa ʻelua ʻē aʻe he PP i hoʻoheheʻe ʻia i nā mea R(PP).Hiki ke hoʻohana ʻia ka ʻōnaehana Asymmetric, a me nā mea ʻē aʻe (PE/HIPS, etc.) hiki ke hoʻohui ʻia nā extruders no ka co-extrusion.Ua like ke kumumanaʻo, a hiki ke hoʻokō ʻia ke ʻano like multi-layer co-extrusion.
Palapala noi
Loaʻa i ka mea EVOH nā waiwai pale maikaʻi.Ma o ka ʻenehana co-extrusion me PP, PE, PA, PETG a me nā mea ʻē aʻe, hiki ke hana ʻia i loko o ka 5-layer, 7-layer, a me 9-layer kiʻekiʻe-parrier lightweight packaging material, i hoʻohana nui ʻia i ka aseptic packaging, jelly drinks, nā huahana waiu, nā iʻa a me nā huahana ʻiʻo i hoʻopili ʻia a me nā mea ʻē aʻe. Ma ke ʻano meaʻai ʻole, hoʻohana ʻia ia i ka lāʻau lapaʻau, ka mea hoʻoheheʻe volatile a me nā māla ʻē aʻe, me nā waiwai pale maikaʻi loa, e hoʻomaikaʻi nui ai i ke ola o nā huahana.
