Dab tsi yog cov khoom muaj pes tsawg leeg ntawm cov hnab yas ntim khoom noj
Cov yas uas siv rau hauv cov hnab yas ntim cov nplej yog ua los ntawm ntau txheej ntawm cov yas zaj duab xis, suav nrog:
1. Polyethylene (PE luv luv)
Nws yog ib qho thermoplastic cob tau los ntawm polymerization ntawm ethylene. Hauv kev lag luam, co-polymers ntawm ethylene nrog me me ntawm alpha-ole fins kuj suav nrog. Polyethylene tsis muaj ntxhiab tsw, tsis muaj tshuaj lom, zoo li siv quav ciab, muaj qhov kub thiab txias tsis kam (tsawg kawg ua haujlwm kub tuaj yeem ncav cuag -100 ~ -70 degree), tshuaj lom neeg ruaj khov, thiab tuaj yeem tiv taus feem ntau cov kua qaub thiab alkali yaig ( tsis resistant rau oxidation xwm acid). "Polyethylene" yog hloov tau thiab hloov tau, sib dua li dej, tsis muaj tshuaj lom, thiab muaj cov khoom siv hluav taws xob zoo dua. Nws yog flammable thiab txuas ntxiv hlawv tom qab tawm hauv hluav taws. Cov dej permeability yog tsawg, thiab cov organic vapor permeability kuj loj. Lub pob tshab ntawm polyethylene txo qis nrog qhov nce ntawm crystallinity. Nyob rau hauv ib tug tej yam crystallinity, lub pob tshab nce nrog qhov nce ntawm molecular hnyav. Lub melting point range ntawm high density polyethylene yog 132-135 degree C, thiab melting point ntawm low density polyethylene yog qis (112 degree C) thiab muaj ntau yam. Nws yog insoluble nyob rau hauv ntau cov kuab tshuaj nyob rau hauv chav tsev kub, nrog tsawg dej nqus thiab zoo heev hluav taws xob rwb thaiv tsev. Tshaj li 70 degree, nws tuaj yeem yaj hauv me me hauv toluene, amyl acetate, trichlorethylene thiab lwm cov kuab tshuaj.
Kev Ua: Polyethylene tuaj yeem ua tiav los ntawm tshuab moulding, extrusion, txhaj tshuaj molding thiab lwm yam, thiab yog siv dav hauv kev tsim cov yeeb yaj kiab, cov khoom hollow, fibers thiab cov khoom siv niaj hnub.
Ua rau hauv zaj duab xis: Nws tuaj yeem siv dav ua cov khoom ntim rau ntau yam khoom noj, khaub ncaws, tshuaj, chiv, cov khoom lag luam thiab cov yeeb yaj kiab ua liaj ua teb. Nws tuaj yeem ua tiav rau hauv cov yeeb yaj kiab sib xyaw los ntawm extrusion rau ntim cov khoom hnyav. Txij li thaum xyoo 1975, cov yeeb yaj kiab polyethylene muaj qhov ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom polyethylene kuj tau tsim, uas muaj lub zog siab, tsis kub tsis kam, tiv taus noo noo, thiab zoo luam-muaj peev xwm thiab txheej txheem-muaj peev xwm. Qhov loj tshaj plaws ntawm kev siv linear low-density polyethylene kuj tseem ua rau cov yeeb yaj kiab, nws lub zog thiab lub zog yog zoo dua li cov polyethylene uas tsis muaj qhov ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom kuj zoo dua, txawm tias cov pob tshab tsis zoo, nws tseem yog me ntsis zoo dua li qhov ntom ntom. polyethylene. PE zaj duab xis muaj zog tshuaj stability thiab tej yam kua qaub thiab alkali tsis kam ntawm chav tsev kub, thiab yog insoluble nyob rau hauv tej hnyav. Nws feem ntau yog thawj qhov kev xaiv rau cov khoom siv txheej hauv cov khoom ntim khoom noj.
2. Polyester zaj duab xis (xws li PET zaj duab xis)
Nws yog tus cwj pwm los ntawm kev kub siab, kev luam ntawv zoo, kev ua haujlwm yooj yim, kev tiv thaiv hluav taws xob zoo thiab rwb thaiv tsev, hluav taws kub los ntawm UL daim ntawv pov thawj 94VTM-2 ntawv pov thawj, kev tiv thaiv ib puag ncig tau dhau SGS, ROSH ntawv pov thawj, siv polyethylene terephthalate li raw khoom, siv Nws yog ua rau hauv daim ntawv tuab los ntawm txoj kev extrusion, thiab tom qab ntawd ua rau hauv cov khoom siv nyias nyias los ntawm biaxial stretching. Nws yog xim tsis muaj xim, pob tshab thiab glossy zaj duab xis nrog cov khoom siv zoo heev, siab rigidity, hardness thiab toughness, puncture kuj, kev sib txhuam tsis kam, kub thiab kub tsis kam, tshuaj tsis kam, roj tsis kam, huab cua nruj thiab tshuaj tsw qab. Zoo, nws yog ib qho ntawm feem ntau siv barrier composite film substrates. Txawm li cas los xij, tus nqi ntawm polyester zaj duab xis yog qhov siab, thiab dav dav yog 0.12mm. Nws feem ntau yog siv los ua cov khoom txheej txheej ntawm retort ntim thiab muaj peev xwm luam tawm zoo.
3. Poly-amide (hu ua PA)
Cov saw tseem ceeb ntawm lub cev yog cov polymer uas muaj ntau pawg amide rov ua dua, thiab hom polymer no feem ntau hu ua nylon. Piv nrog rau cov khoom siv dav dav, poly-amide muaj qhov zoo ntawm kev hnav tsis kam, toughness, tshuaj tiv thaiv, kub tsis kam, txias tsis kam, yooj yim molding, nws tus kheej lubrication, tsis muaj tshuaj lom, yooj yim dyeing, thiab lwm yam. Qhov loj tshaj feature ntawm zaj duab xis yog lub tsawg oxygen kis tus nqi. Lub thawv ntim khoom yog qhov tsim nyog rau kev khaws cia ntev ntawm cov khoom tsis muaj cua to thiab ya raws deterioration. Nws yog ib qho tseem ceeb ntawm cov khoom siv hauv lub tshuab nqus tsev. Ntawm tag nrho cov ntau yam ntawm poly-amide, bi-axially oriented nylon zaj duab xis yog tsuas yog siv rau ntim khoom noj; Qhov zoo yog qhov siab puncture tsis kam, cuam tshuam lub zog, kev sib txhuam lub zog, khoov lub zog, thiab cov khoom siv roj zoo, tab sis qhov tsis zoo yog cov cua sov tsis zoo, thaum siv, nws feem ntau ua ke nrog cov yeeb yaj kiab substrate nrog cov khoom cua sov zoo.
Rau cov ntim khoom noj khov, nws tsuas yog siv cov yam ntxwv ntawm cov yeeb yaj kiab siab, zoo puncture tsis kam thiab txias txias.
Nws yog siv rau seasoning ntim ntawm kua zaub noodle kua, feem ntau yog siv nws lub zog siab, zoo puncture kuj, tshwj xeeb tshaj yog roj kuj.
Nws yog siv rau retort-resistant zaub mov ntim, feem ntau yog siv nws cov roj tsis kam, kub tsis kam, zoo gas barrier zog, thiab puncture kuj.
4. Bi-axially oriented polypropylene zaj duab xis (BOPP luv luv)
Nws qhov ntau lawm yog tias cov yaj ntawm high molecular polypropylene yog thawj zaug ua rau cov nplooj ntawv lossis cov yeeb yaj kiab tuab los ntawm lub taub hau ntev thiab nqaim, thiab tom qab ntawd hauv lub tshuab tshwj xeeb ncab, ntawm qhov kub thiab txias thiab teeb tsa ceev, ib txhij lossis ib kauj ruam. Nws yog ib zaj duab xis ua los ntawm stretching nyob rau hauv ob txoj kev ntsug (longitudinal, transverse), thiab tom qab tsim nyog txias los yog kev kho cua sov los yog ua tshwj xeeb (xws li corona, txheej, thiab lwm yam).
BOPP muaj cov pob tshab thiab gloss, zoo heev number case thiab txheej adhesion, tshav kub sealing zog, dej vapor thiab roj barrier zog, UV barrier zog, high-qib tsos ntawm pearl luster, siab barrier zog thiab tsis tshua muaj hluav taws xob zoo li qub zog. Nws yog feem ntau siv los ua cov khoom siv yooj yim rau lub hnab luam ntawv thiab kev sib xyaw ntawm cov hnab ntim khoom.
Cov khoom ntawm lub hnab ntim khoom ntim yog ze ze rau cov khoom siv tshuaj, thiab cov saum toj no yog ib feem ntawm cov khoom siv yooj yim ntawm cov hnab ntim khoom noj. Piv txwv li, Kraft daim ntawv, txhuas ntawv ci, CPP, thiab YOPP kuj yog ib qho ntawm cov khoom sib xyaw rau cov hnab ntim mov.
