Txawm hais tias nws yog lub thoob dej yug ntses lossis lub yacht, cov rooj tog zaum rot, laminate pem teb, lub dav hlau qauv lossis txhua yam - epoxy resin tuaj yeem siv tau ntawm no. Cov nplaum thiab sealing cov khoom ntawm cov khoom siv no zoo heev uas tsis yog siv los kho. Tseem muaj lwm yam zoo. Txawm li cas los xij, koj yuav tsum paub cov hauv paus ntawm kev ua haujlwm.
Epoxy resins
Epoxy resins yog hu ua reactive resins. Qhov no yog hais txog cov kua hluavtaws resins uas tuaj yeem ua tau yooj yim rau hauv cov yas thermoset. Qhov zoo siab txog nws: Cov kua dej sib xws pib tso cai rau ntau yam thiab siv tau yooj yim, thaum cov yas tawv tawv tom qab ntawd muaj kev ruaj ntseg siab heev. Txoj kev kho nws tus kheej yuav siv qhov chaw ntawm chav tsev kub thiab tsis xav tau ntau lub siab. Muab cov keeb kwm yav dhau los no, nws tsis yog qhov xav tsis thoob tias cov khoom siv, tsim nyob rau xyoo 1930s, tam sim no tuaj yeem pom yuav luag txhua qhov chaw.
Cov kev siv ib txwm muaj xws li:
- Kev tsim cov nplaum hauv nkoj thiab kev tsim kho glider
- Metal kua nplaum
- Muaj raws li yas
- Cast resin rau cov khoom hauv txheej txheem casting
- Plaub coatings
- Xim, piv txwv li kev tiv thaiv corrosion
- Sealants
- plastination
Cov spectrum ntawm cov kev siv tshwj xeeb yog los ntawm kev tsim kho lub glider mus rau kev kho vaj tse sab hauv ntawm cov kav dej mus rau orthopedic technology. Txij li cov khoom siv tsis muaj tshuaj lom tag nrho thaum tawv, nws feem ntau siv los tsim cov thoob dej yug ntses thiab terrariums nrog rau cov qauv tsim. Txog tam sim no, epoxy resins tsis tuaj yeem siv dua thiab feem ntau yuav tsum tau muab pov tseg ntawm thermally. Tsis tas li ntawd, tam sim no lawv tau tsim tshwj xeeb los ntawm cov roj av. Txawm li cas los xij, kev sim tau tab tom ua kom tau los ntawm cov khoom siv txuas ntxiv dua tshiab.
Note:
Cov thermoset yas uas tsim tom qab kho yog tsis muaj tshuaj lom. Cov epoxy resin nws tus kheej, txawm li cas los xij, tuaj yeem ua rau cov tsos mob lom thiab lub cev tsis zoo.
Mixture
Epoxy resins tsis muaj los yuav npaj ua. Lawv yuav tsum xub muab sib xyaw ua ntej siv tiag tiag. Dab tsi koj yuav tsum paub yog tias cov khoom yog tsim los ntawm ob yam tseem ceeb - xws li cov khoom siv hluavtaws tiag tiag thiab cov tawv tawv. Tsuas yog thaum ob qho khoom sib xyaw ua ke hauv ib qho kev sib xyaw tshwj xeeb yuav tsim cov yas thermoset uas xav tau. Nyob rau hauv cov ntsiab lus no ib tug hais txog ib tug stoichiometric resin-hardener piv. Qhov no yuav tsum tau ua raws li qhov ua tau zoo, txwv tsis pub cov khoom xav tau yuav tsis ua tiav lossis tsuas yog ua tiav tsis txaus.
Qhov piv yog nyob ntawm cov khoom lag luam. Cov chaw tsim khoom tshwj xeeb rau kev sib xyaw yuav tsum tau ua raws li qhov tseeb. Txawm li cas los xij, cov no tuaj yeem sib txawv raws li qee qhov xwm txheej - xws li yog tias qee yam khoom xav tau. Ua li no, qhov hardness lossis elasticity ntawm lub thermoset tuaj yeem cuam tshuam.
Note:
Thaum sib txawv ntawm qhov sib tov, koj yuav tsum paub ua ntej uas muaj pes tsawg leeg tsim nyog rau cov nyhuv twg.
Processing
Lub hauv paus tseem ceeb rau kev ua cov epoxy resins yog sib xyaw ob yam khoom hauv qhov sib xyaw ua ke sib piv. Muaj cov khoom siv A (cov cob) thiab B tivthaiv (lub hardener). Ob leeg ib txwm xa tuaj ua ke. Kev sib tov yog ua los ntawm kev ntxiv B tivthaiv rau A tivthaiv thiab tom qab ntawd sib tov nrog nws. Tom qab sib xyaw ua ke, cov epoxy resin tau npaj siv.
Pob lub sijhawm
Lub lauj kaub lub neej yog lub sijhawm uas cov epoxy sib xyaw tuaj yeem ua tiav. Thaum lub sij hawm no, qhov loj tseem nyob rau hauv ib tug kua, tsis hardened lub xeev. Qhov ntev ntawm lub lauj kaub lub neej nyob ntawm cov hauv qab no:
- Type ntawm epoxy resin xaiv
- Variation of mixing ratio
- Kev ntsuas kub
- Tus nqi ntawm cov khoom sib xyaw
Cov chaw tsim khoom cov ntaub ntawv ntawm lub lauj kaub lub neej lossis lub sijhawm ua haujlwm feem ntau yog hais txog qhov loj ntawm 100 grams thiab ua haujlwm kub ntawm 20 degrees Celsius. Cov khoom loj dua tuaj yeem tsim qhov kub thiab txias dua, uas ua rau txo lub lauj kaub lub neej. Yeej, lub sijhawm ua haujlwm tuaj yeem nyob ntawm ob peb feeb mus rau teev.
Tip:
Nws yog qhov zoo dua los sib tov me ntsis epoxy resin ntau dua, vim ntau dhau tuaj yeem ua rau cov resin tsis tuaj yeem ua tiav.
Application
Kev siv cov epoxy resin hu ua daim ntawv thov. Qhov no txhais tau hais tias, piv txwv li, siv lub compound rau ib qho chaw los yog qhia nws mus rau hauv ib qho kev sib koom ua ke. Cov cuab yeej sib txawv yog siv rau qhov no, xws li spatula, spatula, trowel lossis txawm tias lub koob txhaj tshuaj lossis lub applicator. Cov cuab yeej twg koj xaiv yog nyob ntawm hom kev thov. Koj yuav tsum ua haujlwm kom sai thiab ua tib zoo ua txhua zaus. Cov cheeb tsam loj yuav tsum tau coated sib npaug. Tshaj epoxy resin yuav tsum tau muab tshem tawm tam sim ntawd, vim qhov no feem ntau tsis tuaj yeem ua tiav thaum nws tau tawv.
kev
Theem tom qab thov mus txog rau lub thermoset tiav yog hu ua lub sij hawm kho. Nws feem ntau yog tsawg kawg yog ob peb teev. Nws yog ib qho nyuaj heev los muab cov ntaub ntawv meej txog qhov no. Lawv nyob rau hauv lem nyob ntawm seb muaj pes tsawg leeg thiab cov txheej txheem kub. Tsuas yog tom qab kawg hardening yog lub workpiece nyob rau hauv nqe lus nug siab resilient thiab usable. Kev kho tuaj yeem ua kom nrawm dua - piv txwv li los ntawm kev muab photoinitiators nrog lub teeb ultraviolet. Qhov no tuaj yeem ua rau lub sijhawm kho kom luv rau ob peb feeb xwb.
kev tiv thaiv
Thaum ua cov epoxy resins, hnab looj tes yuav tsum yeej ib txwm hnav los tiv thaiv daim tawv nqaij. Ob qho tib si hluavtaws cob thiab cov tawv tawv tuaj yeem ua rau muaj kev tsis haum thiab tsis kaj siab ntawm daim tawv nqaij. Nitrile lossis butyl hnab looj tes nrog rau PE laminate hnab looj tes yog tsim rau qhov no. Cov hnab looj tes pov tseg ua los ntawm latex lossis yas, ntawm qhov tod tes, yog qhov tsis tsim nyog vim tias cov ntaub ntawv no tuaj yeem nkag mus los ntawm ob cov ntaub ntawv raw. Nws tseem yog ib qho tseem ceeb los xyuas kom meej tias cov chav zoo ventilated. Txawm li cas los xij, tsis tas yuav tsum hnav daim npog qhov ncauj.
