Khob ceev ceev faj

Lub khob feem ntau siv hauv lub neej niaj hnub yog lub khob dej, tab sis muaj ntau hom khob. Hais txog cov khoom siv khob, cov khoom siv feem ntau suav nrog khob khob, enamel khob, khob ceramic, khob yas, khob stainless hlau, khob ntawv, khob insulation, khob noj qab haus huv, thiab lwm yam. Yuav ua li cas xaiv lub khob haus kom zoo uas haum rau haus.
1. Yas khob: Xaiv cov khoom noj khoom haus qib yas
Cov khob yas tau hlub los ntawm ntau tus neeg vim lawv cov duab ntau yam, xim ci, thiab tsis muaj kev ntshai, ua rau lawv zoo heev rau cov neeg siv sab nraum zoov thiab cov neeg ua haujlwm hauv chaw ua haujlwm. Feem ntau hais lus, hauv qab ntawm lub khob yas yog cim nrog tus lej ntawm daim duab peb sab me me, feem ntau hu ua "05", qhia tias cov khoom ntawm lub khob yog PP (polypropylene). PP cov khoom siv khob muaj cov cua kub zoo, cov ntsiab lus melting ntawm 170 degree thiab 172 degree, thiab cov khoom siv tshuaj lom neeg kuj tseem ruaj khov. Sib nrug los ntawm kev corroded los ntawm concentrated sulfuric acid thiab concentrated nitric acid, nws kuj tseem ruaj khov rau ntau yam tshuaj reagents. Tab sis qhov teeb meem nrog lub khob yas zoo tib yam yog qhov muaj ntau heev. Yas belongs rau cov khoom siv tshuaj polymer. Thaum siv cov khob yas los tuav cov dej kub los yog dej kub npau npau, cov polymer yog yooj yim los nag thiab yaj hauv dej, uas yog teeb meem rau tib neeg kev noj qab haus huv tom qab noj. Ntxiv mus, sab hauv microstructure ntawm cov yas muaj ntau qhov pores, uas zais av thiab tuaj yeem tsim cov kab mob yog tias tsis tau ntxuav kom huv si. Yog li kev xaiv lub khob yas yog qhov tseem ceeb heev rau kev xaiv cov khoom siv yas, thiab nws yog ib qho tsim nyog yuav tsum xaiv cov khoom noj khoom haus qib yas uas ua tau raws li cov qauv hauv tebchaws. Nws yog ua los ntawm cov khoom siv PP.