Si loo kordhiyo nolosha shelf ee walxaha sida cuntada iyo daroogada, badanalaabta baakadahacuntada iyo daroogooyinka maalmahan isticmaal baakado lakabyo badan oo isku dhafan. Hadda, waxa jira laba, saddex, shan, todoba, sagaal, iyo xataa kow iyo toban lakab oo ah alaabta baakadaha. Baakadaha lakabka badan waa filim khafiif ah oo la sameeyay iyadoo lagu soo saarayo alaabooyin badan oo caag ah oo ceeriin ah isla mar ahaantaana laga soo bilaabo hal caaryada furan, taas oo ka faa'iideysan karta faa'iidooyinka agabyada kala duwan.
Lakab badanduub filimka baakadahawaxay inta badan ka kooban yihiin isku darka polyolefin. Hadda, dhismayaasha sida caadiga ah loo isticmaalo waxaa ka mid ah: polyetylen/polyethylene, polyetylen ethylene vinyl acetate copolymer/polypropylene, LDPE/lakabka xabagta/EVOH/lakabka xabagta/LDPE, LDPE/lakabka xabagta/EVH/EVOH/EVOH/lakabka xabagta/LDPE. Dhumucda lakabka kasta waxaa lagu hagaajin karaa iyada oo loo marayo farsamada extrusion. Iyada oo la hagaajinayo dhumucda lakabka xannibaadda iyo isticmaalka noocyo kala duwan oo qalab ah, filimyo dabacsan oo leh sifooyin kala duwan ayaa la naqshadeyn karaa. Alaabta lakabka kulaylka ayaa sidoo kale si dabacsanaan leh loo bedeli karaa oo loo hagaajin karaa si loo daboolo baahiyaha baakadaha kala duwan. Xirmooyinka baakadaha badan ee lakabka ah iyo kuwa kala duwan ayaa ah jihada guud ee horumarinta alaabta baakadaha mustaqbalka.
Baakadaha lakabka badan ee qaabdhismeedka filimka isku dhafan
Baakadaha lakabka badan ee filimka isku dhafan, iyadoon loo eegin tirada lakabyada, guud ahaan waxaa loo qaybiyaa lakabka saldhigga, lakabka shaqeynaya, iyo lakabka dhejiska oo ku salaysan shaqada lakab kasta oo filimka ah.
Heerka aasaasiga ah
Guud ahaan, lakabyada gudaha iyo dibadda ee filimada isku dhafan waa inay lahaadaan sifooyin jireed iyo farsamo oo wanaagsan, samaynta waxqabadka habaynta, iyo lakabka daboolida kulaylka. Waxa kale oo ay u baahan tahay in ay leedahay qaab-dhismeed kuleyl ah oo wanaagsan iyo waxqabadka alxanka kulul, kuwaas oo ah kuwo qiimo jaban, waxay leeyihiin taageero wanaagsan iyo saameyn ku yeelashada lakabka shaqeynta, waxayna leeyihiin saamiga ugu sarreeya ee filimka isku-dhafka ah, go'aaminta guud ahaan qallafsanaanta filimka isku-dhafka ah. . Maaddooyinka asaasiga ahi waxay u badan yihiin PE, PP, EVA, PET, iyo PS.
Lakabka shaqaynaya
Lakabka shaqeynaya eefilimka baakadaha cuntadaInta badan waa lakabka xannibaadda, oo inta badan dhexda u ah filim isku dhafan oo lakabyo badan leh, oo inta badan la isticmaalo resins barrier sida EVOH, PVDC, PVA, PA, PET, iwm. Waxaa ka mid ah, qalabka ugu badan ee la isticmaalo ee xannibaadaha sare waa EVOH iyo PVDC , iyo PA iyo PET-ga caadiga ah waxay leeyihiin sifooyin xannibaadyo isku mid ah, oo ka tirsan qalabka xannibaadaha dhexdhexaadka ah.
EVOH (copolymer alkolada vinyl etylene)
Copolymer-ka aalkolada ethylene vinyl waa walxo polymer ah oo isku daraysa hab-socodka polymers-ka ethylene iyo sifooyinka gaaska xannibaadda ee polymers-ka alkohol ethylene. Aad bay u hufan tahay waxayna leedahay dhalaal wanaagsan. EVOH waxay leedahay sifooyin aad u fiican oo gaaska iyo saliida leh, oo leh awood farsamo oo aad u fiican, dabacsanaan, caabbinta xidhashada, caabbinta qabow, iyo xoogga dusha sare, iyo waxqabadka habaynta aad u fiican. Waxqabadka xannibaadda EVOH waxay kuxirantahay nuxurka ethylene. Marka nuxurka ethylene uu kordho, waxqabadka xannibaadda gaaska ayaa hoos u dhacaya, laakiin waxqabadka caabbinta qoyaanku wuu kordhiyaa, wayna fududahay in la farsameeyo.
Alaabooyinka lagu baakadeeyay alaabta EVOH waxaa ka mid ah xawaashyada, waxyaabaha caanaha laga sameeyo, hilibka hilibka, alaabta farmaajo, iwm.
PVDC (polyvinylidene chloride)
Polyvinylidene chloride (PVDC) waa polymer ka koloriin vinylidene (1,1-dichlorethylene). Heerkulka burburka ee homopolymer PVDC wuu ka hooseeyaa barta dhalaalaysa, taas oo adkeynaysa inuu dhalaaliyo. Sidaa darteed, sida walxaha baakadaha, PVDC waa copolymer of vinylidene chloride iyo vinyl chloride, kaas oo leh hawo wanaagsan, caabbinta daxalka, daabacaadda wanaagsan iyo sifooyinka kulaylka.
Waagii hore, waxaa inta badan loo isticmaali jiray baakadaha militariga. Sannadihii 1950-aadkii, waxa la bilaabay in loo isticmaalo filimka ilaalinta cuntada, gaar ahaan horumarinta degdega ah ee tignoolajiyada casriga ah ee baakadaha iyo xawliga nololeed ee dadka casriga ah, baakadaha kaydinta degdega ah iyo kaydinta, kacaanka microwave-ka, iyo kordhinta cuntada iyo Nolosha maandooriyaha ayaa ka dhigtay codsiga PVDC mid caan ah. PVDC waxaa laga samayn karaa filimo aad u khafiif ah, hoos u dhigaya cadadka alaabta ceeriin iyo kharashka baakadaha. Ilaa maanta waa caan
lakabka xabagta
Xidhiidhka liidata ee u dhexeeya qaar ka mid ah resins-yada salka iyo resins lakabka shaqaynaya, waxa lagama maarmaan ah in la dhigo qaar ka mid ah lakabyada xabagta inta u dhaxaysa labadan lakab si ay u noqdaan sida xabag iyo samaynta filim isku dhafan oo isku dhafan. Lakabka xabaggu wuxuu isticmaalaa xabagta xabagta, sida caadiga ah loo isticmaalo waxaa ka mid ah polyolefin ku tallaalan anhydride maleic iyo ethylene vinyl acetate copolymer (EVA).
Maleic anhydride-ku-tallaalidda polyolefins
Maleic anhydride maleic anhydride polyolefin waxa soo saara iyada oo lagu tallaalayo maleic anhydride labka ah ee loo yaqaan polyetylen iyada oo la adeegsanayo falcelinta falcelinta, soo bandhigida kooxaha dhinaca dabaysha ee silsiladaha aan dabaylaha ahayn. Waa xabag udhaxeysa maaddooyinka polar iyo non-polar waxaana caadi ahaan loo isticmaalaa filimada isku dhafan ee polyolefins sida polypropylene iyo naylon.
EVA (etylene vinyl acetate copolymer)
EVA waxay ku soo bandhigaysaa monomer vinyl acetate silsiladda molecular, yaraynta crystallinity ee polyetylen iyo hagaajinta milanka iyo kuleyliyaha waxqabadka daboolida buuxinayaasha. Waxyaabaha kala duwan ee ethylene iyo vinyl acetate ee agabku waxay keenaan codsiyo kala duwan:
① Alaabooyinka ugu muhiimsan ee EVA oo leh ethylene acetate ka hooseeya 5% waa xabagta, filimada, fiilooyinka iyo fiilooyinka, iwm;
② Alaabooyinka ugu muhiimsan ee EVA oo leh maadada vinyl acetate ee 5% ~ 10% waa filimo laastikada ah, iwm;
③ Alaabooyinka ugu muhiimsan ee EVA oo leh maadada vinyl acetate ee 20% ~ 28% waa xabagta dhalaalaysa kulul iyo alaabta daahan;
④ Alaabooyinka ugu muhiimsan ee EVA oo leh maadada vinyl acetate ee 5% ~ 45% waa filimaan (oo ay ku jiraan filimada beeraha) iyo xaashida, alaabta la isku duro, alaabta xumbo, iwm.
Waqtiga boostada: Jun-12-2024