ngwa

LDPE bụ aobere njupụta polyethylene, nke a na-akwado ya site na polymerization nke ethylene monomer catalyzed site na onye na-eme ihe na-egbuke egbuke na-enweghị ihe ọ bụla ọzọ copolymer.Ya molekụla e ji mara bụ nnọọ elu branching ogo, na a ọnụ ọgụgụ buru ibu nke ogologo branched n'agbụ, n'ihi na ibe entanglement nke molekul n'agbụ, nke mere na ya siri ike bụ ogbenye, nwere ike ịbụ nnukwu nkezi nke gbatịa, ala mmetụta ike.

N'otu oge ahụ, n'ihi ogo alaka ya dị elu, ọ nwere ike mgbaze dị elu, nke na-arụ ọrụ dị ukwuu n'ime ka akpụkpọ ahụ dịkwuo ike.N'ihi unwinding nke molekul na usoro nke shiee, o nwere doro anya shiee thinning àgwà, na gbazee viscosity na-ukwuu belatara na akwa shiee, nke na-eweta ezi extrusion nhazi arụmọrụ, gosipụtara dị ka ala gbazee mgbali, ala gbazee okpomọkụ na moto ibu. .

N'ihi njirimara ndị a dị n'elu, enwere ike iji LDPE mee ihe n'ụzọ dị nro na nhazi nhazi iji nweta ọrụ achọrọ.E nwere tumadi akụkụ ndị a:

1. Meziwanye arụmọrụ igwe

N'ịbawanye ahịa ahịa chọrọ maka nkwakọ ngwaahịa, iji metallocene na-abawanye ụba, ọ bụ ezie na arụmọrụ nke metallocene dị ezigbo mma, ma nhazi ahụ na-abụkarị ọgịrịga ya dị nro, na-emekarị na usoro extrusion na-emepụta oke ọkụ ọkụ, nrụgide. na-abawanye, okpomọkụ na-ebili, akpụkpọ ahụ afụ na-ejighị n'aka.Enwere ike imeziwanye nke a site na ịgwakọta LDPE, mgbakwunye mgbakwunye nwere ike ịbụ 15-30%, ma ọ bụrụ na mgbakwunye mgbakwunye dị oke elu, ọ ga-emetụta kpọmkwem akụrụngwa anụ ahụ ikpeazụ nke ihe nkiri ahụ, nke kwesịrị ịdị nhata.

2. Melite arụmọrụ ngwa anya

Ụfọdụ ihe nkiri nwere ụfọdụ ihe a chọrọ maka ngwa anya.Linear ma ọ bụ metallocene LLDPE nwere ngwa anya n'ozuzu, tumadi n'ihi na uto kristal dị n'ime ya buru oke ibu.Ọ bụrụ na 5-15% LDPE na-agbakwunye ya, ọ ga-enyere aka belata nha kristal dị n'ime, iji mee ka ikuku na nghọta dịkwuo mma.

3. Meziwanye arụmọrụ akara okpomọkụ

Ịrụ ọrụ mkpuchi ọkụ nke linear ma ọ bụ metallocene LLDPE dị mma karịa nke LDPE.Otú ọ dị, n'ihi na Ọdịdị nke elu branched ogo na elu gbazee viscosity na ala shiee, LDPE nwere ike igbochi okpomọkụ akara ntụpọ kpatara oké extrusion nke okpomọkụ akara film n'oge okpomọkụ akara.N'otu oge ahụ, ego kwesịrị ekwesị nke LDPE nwere ike imeziwanye ike njikọ ọkụ, mana ego ekwesịghị ịbụ nke ukwuu.Ma ọ bụghị ya, ọ ga-eme ka akara okpomọkụ dịkwuo njọ.

4. Mmezi ọrụ ndị ọzọ

Dịka ọmụmaatụ, na ihe nkiri shrinkage iji meziwanye nkwụsị ọkụ na nkwụsịtụ ọkụ;Enwere ike imeziwanye ihe ngosi nke agụ site na ihe nkiri ikuku.Iji meziwanye ihe olu olu na ihe nkiri nkedo;Na griin haus film ka mma kwụsie ike nke akpụkpọ ahụ afụ iji nweta nnukwu ọnụ ọgụgụ membrane mmepụta, na na.

Enwere ike ịhụ na LDPE na-arụ ọrụ dị mkpa n'ichepụta ihe nkiri dị nro n'ihi usoro ihe omimi ya pụrụ iche, yana njikọ ezi uche dị na ya na ihe ndị ọzọ polymer nwere ike nweta njikarịcha nke imepụta na nkwalite arụmọrụ.