Lub raj mis tsiaj zawv plaub hau

2026-01-30

Thaum peb khaws lub raj mis tshuaj zawv plaub hau uas siv ntau, yuav muaj daim ntawv lo PET nyob rau hauv qab ntawm lub raj mis, qhia tias cov khoom no yog lub raj mis PET. Lub raj mis PET feem ntau yog siv rau hauv kev lag luam saib xyuas tus kheej thiab feem ntau yog cov khoom loj. Lub raj mis PET yog cov thawv yas tau los ntawm kev ua cov khoom yas PET los ntawm ib kauj ruam lossis ob kauj ruam. Cov yas PET muaj cov yam ntxwv ntawm kev sib dua, pob tshab heev, thiab tiv taus kev cuam tshuam thiab tawg.

PET, lossis polyethylene terephthalate, tseem hu ua polyester. Nws lub npe lus Askiv yog Polyethylene Terephthalate, uas yog tsim los ntawm cov tshuaj polymerization reaction (condensation) ntawm ob yam khoom siv tshuaj lom neeg: terephthalic acid (PTA) thiab ethylene glycol (EG). Preforms yog cov khoom txhaj tshuaj. Raws li cov khoom nruab nrab semi-finished rau tom qab biaxial stretching thiab blow molding, lub caj dab ntawm preform yog puab thaum lub sijhawm txhaj tshuaj molding, thiab nws qhov loj me yuav tsis hloov thaum lub sijhawm cua sov thiab ncab / blow molding. Qhov loj me, qhov hnyav, thiab phab ntsa tuab ntawm preform yog cov yam uas yuav tsum tau them sai sai rau thaum lub sijhawm tshuab molding ntawm lub raj mis.

Thaum npaj cov fwj uas siv lub tshuab pwm, cov PET chips yuav tsum tau txhaj rau hauv lub preform ua ntej. Yuav tsum tsis txhob muaj cov khoom siv rov ua dua tshiab ntau dhau (tsawg dua 5%), thiab lub sijhawm rov ua dua tshiab yuav tsum tsis txhob tshaj ob. Qhov hnyav molecular thiab viscosity yuav tsum tsis txhob qis dhau (qhov hnyav molecular 31,000 - 50,000, viscosity intrinsic 0.78 - 0.85 cm³/g). Raws li Txoj Cai Kev Nyab Xeeb Khoom Noj Hauv Tebchaws, cov khoom siv rov ua dua tshiab raug txwv tsis pub siv rau kev ntim khoom noj thiab tshuaj. Cov preforms txhaj tshuaj yuav tsum khaws cia rau ntau tshaj 24 teev ua ntej siv. Cov preforms uas tsis siv tom qab cua sov yuav tsum khaws cia rau ntau tshaj 48 teev ua ntej rov ua kom sov. Lub sijhawm khaws cia ntawm lub raj mis yuav tsum tsis txhob tshaj rau lub hlis. Qhov zoo ntawm cov preform feem ntau nyob ntawm qhov zoo ntawm cov khoom siv PET, yog li nws yog qhov tsim nyog los xaiv cov khoom siv uas yooj yim rau inflate thiab tsim, thiab los tsim cov txheej txheem preform molding tsim nyog. Cov kev sim qhia tau hais tias cov preforms ua los ntawm cov khoom siv raw tuaj txawv teb chaws nrog tib lub viscosity yooj yim dua rau tshuab pwm dua li cov uas ua los ntawm cov khoom siv raw hauv tsev. Txawm li cas los xij, rau tib pawg ntawm preforms, hnub tsim khoom sib txawv yuav xav tau cov txheej txheem tshuab pwm sib txawv. Qhov zoo ntawm preform txiav txim siab qhov nyuaj ntawm cov txheej txheem tshuab pwm. Cov kev cai rau preform yog purity, pob tshab, tsis muaj impurities, tsis muaj xim, qhov ntev ntawm qhov txhaj tshuaj tsim nyog, thiab lub halo nyob ib puag ncig nws.

Cov fwj PP thiab PE feem ntau yog cov xim khov kho, thaum cov khoom PETG, PET, thiab PVC feem ntau yog pob tshab lossis xim pob tshab nrog qhov pom tseeb thiab pom tseeb, thiab cov xim khov kho siv tsawg dua. Cov fwj PET kuj tuaj yeem txau xim. Muaj ib qho taw tes convex ntawm qab ntawm lub raj mis tshuab pwm, uas ci dua hauv qab lub teeb. Hauv qab ntawm lub raj mis txhaj tshuaj pwm muaj ib txoj kab sib txuas. Cov khoom siv tseem ceeb rau cov fwj tshuab pwm suav nrog cov stoppers sab hauv (feem ntau siv rau cov khoom PP thiab PE), lub hau sab nraud (feem ntau siv rau PP, ABS, thiab acrylic, thiab kuj muaj nyob rau hauv electroplated, electro-galvanized, thiab txau xim tiav, feem ntau siv rau cov fwj toner), lub taub hau twj tso kua mis (feem ntau siv rau essence thiab lotion), lub hau flip, thiab lub hau snap (feem ntau siv rau hauv cov kab tshuaj lom neeg txhua hnub).