HPMC cov chaw tsim khoom-cov nyhuv ntawm cov viscosities sib txawv ntawm cellulose ethers ntawm cov hmoov putty

qhia txog:

Cov cellulose ethers siv dav hauv kev lag luam kev tsim kho vim lawv cov dej zoo heev, thickening thiab bonding zog. Lawv txhim kho qhov ntws thiab processability ntawm cov ntaub ntawv raws li cement thiab txhim kho cov khoom siv kho tshuab ntawm cov khoom kawg. Putties feem ntau siv hauv kev lag luam kev tsim kho kom sau cov kab nrib pleb, qhov thiab lwm yam tsis zoo hauv phab ntsa thiab qab nthab. Kev siv cov cellulose ethers hauv cov hmoov putty tuaj yeem txhim kho qhov ua haujlwm tau zoo, teeb tsa lub sijhawm thiab tag nrho cov khoom zoo. Tsab xov xwm no yuav tham txog cov nyhuv ntawm cov viscosities sib txawv ntawm cellulose ethers ntawm cov hmoov putty.

Cov hom cellulose ethers:

Muaj ntau hom cellulose ethers xws li methylcellulose (MC), hydroxypropylmethylcellulose (HPMC), ethylcellulose (EC) thiab carboxymethylcellulose (CMC). HPMC yog ib qho cellulose ether nrov hauv kev lag luam kev tsim kho vim nws cov dej zoo heev, ua kom tuab thiab nplaum. HPMC muaj ntau yam viscosities sib txawv, los ntawm qis mus rau siab.

Cov nyhuv ntawm cellulose ether rau ntawm cov hmoov putty:

Cov hmoov putty siv los sau cov kab nrib pleb, qhov thiab lwm yam tsis zoo ntawm phab ntsa thiab qab nthab. Kev siv cov cellulose ethers hauv cov hmoov putty tuaj yeem txhim kho kev ua haujlwm thiab lub sijhawm teeb tsa ntawm cov khoom. Cellulose ether kuj tseem tuaj yeem txhim kho kev ua haujlwm thiab kev nplaum ntawm cov hmoov putty. Cov hauv qab no yog cov nyhuv ntawm cov viscosities sib txawv ntawm cellulose ethers ntawm cov hmoov putty:

1. HPMC tsis muaj viscosity:

HPMC uas tsis muaj viscosity ntau tuaj yeem txhim kho qhov ua haujlwm tau zoo ntawm cov hmoov putty. Nws kuj tseem txhim kho lub sijhawm teeb tsa ntawm cov khoom. HPMC uas tsis muaj viscosity ntau muaj qhov kub qis dua, uas tuaj yeem tiv thaiv cov hmoov putty kom tsis txhob tawv sai dhau. Nws kuj tseem tuaj yeem txhim kho qhov kev nplaum thiab kev sib koom ua ke ntawm cov khoom. HPMC uas tsis muaj viscosity ntau yog qhov tsim nyog rau cov hmoov putty uas xav tau kev ua haujlwm tau zoo thiab du.

2. Qhov nruab nrab viscosity HPMC:

Qhov nruab nrab viscosity HPMC tuaj yeem txhim kho cov yam ntxwv thixotropic ntawm cov hmoov putty. Nws kuj tseem tuaj yeem txhim kho kev khaws dej thiab kev sib txuas ntawm cov khoom. Qhov nruab nrab-viscosity HPMC tuaj yeem txhim kho cov khoom siv kho tshuab ntawm cov khoom, xws li lub zog thiab kev ua haujlwm ntev. Nws yog qhov tsim nyog rau cov hmoov putty uas xav tau kev khaws dej zoo thiab kev sib koom ua ke.

3. Cov HPMC uas muaj viscosity siab:

HPMC uas muaj viscosity siab tuaj yeem txhim kho qhov ua kom tuab thiab tiv thaiv kev poob qis ntawm cov hmoov putty. Nws kuj tseem tuaj yeem txhim kho qhov khaws dej thiab kev sib txuas ntawm cov khoom. HPMC uas muaj viscosity siab tuaj yeem txhim kho cov khoom siv kho tshuab ntawm cov khoom, xws li lub zog thiab kev ruaj khov. Nws yog qhov tsim nyog rau cov hmoov putty uas xav tau kev ua kom tuab thiab tiv thaiv kev poob qis.

xaus lus:

Cov cellulose ethers siv dav hauv kev lag luam kev tsim kho vim lawv cov dej zoo heev, thickening thiab bonding zog. HPMC tau dhau los ua cellulose ether nrov hauv kev lag luam kev tsim kho vim nws cov khoom zoo heev. HPMC muaj ntau yam viscosities, los ntawm qis mus rau siab. Kev siv cov cellulose ethers nrog ntau yam viscosities tuaj yeem txhim kho kev ua haujlwm, teeb tsa lub sijhawm, thixotropic kev ua tau zoo, dej khaws cia, kev sib txuas thiab cov khoom siv kho tshuab ntawm cov hmoov putty. Kev siv cov cellulose ethers tuaj yeem txhim kho qhov zoo thiab kev ua tau zoo ntawm cov hmoov putty, ua rau lawv haum rau ntau yam kev siv hauv kev lag luam kev tsim kho.