Niaj hnub no, tib neeg txhawj xeeb txog lawv txoj kev noj qab haus huv. Qee cov neeg feem ntau pom cov xov xwm tshaj tawm tias qee cov neeg uas noj cov khoom noj rau lub sijhawm ntev yuav ua rau muaj teeb meem kev noj qab haus huv. Yog li ntawd, tam sim no tib neeg muaj kev txhawj xeeb heev txog seb cov hnab yas puas yog lub hnab yas rau cov khoom noj thiab seb lawv puas muaj teeb meem rau lawv txoj kev noj qab haus huv. Nov yog ob peb txoj hauv kev kom paub qhov txawv ntawm cov hnab yas rau zaub mov thiab cov hnab yas zoo tib yam.
Nws yog qhov yooj yim siv hnab yas rau khoom noj thiab lwm yam. Tam sim no, muaj ob hom hnab yas nyob rau hauv kev ua lag luam, ib qho yog ua los ntawm cov ntaub ntawv xws li polyethylene, uas muaj kev nyab xeeb thiab siv tau los ntim cov zaub mov, thiab lwm yam yog tshuaj lom, uas tuaj yeem tsim kev puas tsuaj rau cov ntim khoom noj thiab tsuas yog tuaj yeem ua tau. siv rau kev ntim khoom.
Hnab ntim khoom nojfeem ntau paub rau peb li cov hnab ntim khoom noj, uas muaj cov qauv nruj dua thiab cov qauv siab rau lawv cov ntaub ntawv. Peb feem ntau siv cov khoom noj khoom haus yog feem ntau tsis muaj tshuaj lom, ib puag ncig tus phooj ywg zaj duab xis ua cov khoom tseem ceeb. Thiab cov khoom sib txawv muaj cov yam ntxwv sib txawv, yog li peb yuav tsum xaiv raws li cov yam ntxwv ntawm cov khoom noj nws tus kheej thaum lub sijhawm tsim khoom.
Cov hnab yas zoo li cas yog qib zaub mov?
PE yog polyethylene, thiab PE hnab yas yog qib zaub mov. PE yog ib hom thermoplastic resin ua los ntawm ethylene los ntawm polymerization. Nws tsis muaj ntxhiab tsw thiab tsis muaj tshuaj lom, thiab muaj qhov kub thiab txias tsis kam (qhov kev ua haujlwm qis tshaj plaws yog -100 ~ 70 ℃). Nws muaj tshuaj lom neeg ruaj khov zoo, kua qaub thiab alkali tsis kam, thiab yog insoluble hauv cov kuab tshuaj ntawm qhov kub thiab txias. Nws muaj cov rwb thaiv tsev zoo heev thiab nqus dej tsawg. Khoom noj khoom haus-qib hnab yas feem ntau muab faib ua cov hnab ntim khoom noj zoo tib yam, lub hnab ntim khoom noj khoom haus, lub hnab ntim khoom noj, cov hnab ntim khoom noj, cov hnab ntim khoom noj, cov hnab ntim khoom noj, cov hnab ntim khoom noj thiab lwm yam, nrog rau ntau yam ntaub ntawv. Khoom noj khoom haus-qib hnab yas xws li PE (polyethylene), txhuas ntawv ci, nylon thiab cov ntaub ntawv sib xyaw. Khoom noj khoom haus-qib hnab yas muaj qee yam yam ntxwv txhawm rau xyuas kom cov zaub mov tshiab thiab tsis muaj kab mob thiab rot. Ib qho yog los thaiv cov organic hnyav, roj, roj, dej vapor thiab lwm yam; Lwm qhov yog kom muaj kev tiv thaiv zoo permeability, noo noo tsis kam, txias tsis kam, tiv thaiv tshav kub, tiv thaiv lub teeb thiab rwb thaiv tsev, thiab muaj qhov zoo nkauj zoo nkauj; Qhov thib peb yog ib qho yooj yim sib sau thiab ua cov nqi qis; Qhov thib plaub yog kom muaj lub zog zoo, lub hnab ntim cov hnab yas muaj lub zog ua haujlwm siab rau ib chav tsev qhov hnyav, muaj kev cuam tshuam resistant thiab hloov tau yooj yim.
Khoom noj khoom haus hnab yas thiab cov hnab yas zoo tib yam los txheeb xyuas txoj kev
Txoj kev saib xim, cov hnab yas kev nyab xeeb feem ntau yog cov mis nyuj dawb, translucent, cov yas no yuav hnov lub suab, hnov zoo li lub ntsej muag yog wax, tab sis cov xim ntawm cov hnab yas tshuaj lom feem ntau yog hamster daj, xav tias me ntsis nplaum.
Txoj kev tso dej rau hauv dej, koj tuaj yeem muab lub hnab yas tso rau hauv dej, tos ib pliag kom tso tawm, yuav pom cov dej hauv qab yog cov hnab yas muaj tshuaj lom, qhov sib txawv yog kev nyab xeeb.
Txoj kev tua hluav taws. Cov hnab yas muaj kev nyab xeeb yog yooj yim rau hlawv. Thaum hlawv, lawv yuav muaj cov nplaim xiav zoo li tswm ciab roj, muaj ntxhiab tsw ntawm paraffin, tab sis cov pa luam yeeb tsawg heev. Thiab cov hnab yas muaj tshuaj lom tsis yog nplaim taws, nplaim taws daj, hlawv thiab yaj yuav rub tawm cov kab lo lo ntxhuav, yuav muaj ntxhiab tsw zoo li hydrochloric acid.
Txoj kev tsw. Feem ntau hais lus, cov hnab yas muaj kev nyab xeeb tsis muaj cov ntxhiab tsw txawv txav, ntawm qhov tsis sib xws, muaj pungent, xeev siab tsis hnov tsw, uas tej zaum yuav yog vim kev siv lwm yam tshuaj ntxiv lossis tsis zoo.
Post lub sij hawm: Oct-21-2022