Cov lus piav qhia ntxaws txog qhov tseem ceeb cuam tshuam
1. Cov khoom siv thiab kev tsim
PVC Resin: PVC nws tus kheej muaj cov tshuaj chlorine atoms, uas ua rau nws ua haujlwm zoo rau feem ntau inorganic acids, alkalis thiab ntsev. Txawm li cas los xij, cov kuab tshuaj organic xws li esters, ketones, aromatic hydrocarbons thiab chlorinated hydrocarbons tuaj yeem ua rau nws o lossis yaj.
Plasticizer: Ntxiv cov plasticizers (xws li phthalates) tuaj yeem txhim kho kev yooj yim, tab sis kev sib ntxiv ntau dhau yuav txo cov tshuaj tiv thaiv, tshwj xeeb tshaj yog ua rau cov roj thiab cov kuab tshuaj.
Stabilizer: Siv los tiv thaiv PVC los ntawm decomposing nyob rau hauv tshav kub thiab lub teeb thaum ua thiab kev pab cuam. Piv txwv li, lead ntsev stabilizers (xws li tribasic lead sulfate) muaj thermal stability zoo tab sis muaj tshuaj lom thiab cuam tshuam rau huab cua tsis kam; thaum organotin stabilizers yog tsim nyog rau cov khoom uas muaj siab transparency thiab ib puag ncig yuav tsum tau. Tsis txaus los yog tsis tsim nyog stabilizers yuav ua rau kom ceev aging ntawm cov kav dej nyob rau hauv cov tshuaj chemical media.
Lwm yam Additives: Fillers, cuam tshuam kev hloov pauv thiab lwm yam kuj cuam tshuam rau kev ruaj ntseg tshuaj lom neeg zaum kawg.
2. Kev Siv Tshuab
Kev tswj tsis raug ntawm kev ua haujlwm kub, sib xyaw ua ke, extrusion lossis txhaj tshuaj molding txheej txheem tuaj yeem ua rau cov yas tsis zoo, kev ntxhov siab sab hauv lossis micro tsis xws luag. Cov no yuav dhau los ua cov ntsiab lus rau tshuaj lom neeg nruab nrab corrosion thiab txo cov tshuaj tiv thaiv.
3. Ib puag ncig thiab kev siv cov xwm txheej
Hom thiab Concentration ntawm Chemical Media: Qhov no yog qhov ncaj qha tshaj plaws. Qhov tsis kam ntawm PVC sib txawv nrog cov concentration ntawm qhov nruab nrab. Piv txwv li, nws tuaj yeem tiv taus cov ntsiab lus hydrochloric acid, sulfuric acid qis dua 90%, nitric acid ntawm 50-60%, thiab caustic soda qis dua 20%, tab sis nws tsis tuaj yeem tiv taus cov oxidizing acids xws li fuming sulfuric acid thiab concentrated nitric acid.
Kub: Qhov kub thiab txias yuav ua rau kom cov txheej txheem tshuaj corrosion. Qhov ntev -lub sij hawm kev pab kub ntawm PVC feem ntau tsis haum kom siab tshaj 55-60℃.
Lub Sijhawm thiab Kev Nyuaj Siab: Ntev - lub sijhawm immersion thiab tsis tu ncua txhua yam kev ntxhov siab (xws li cov yeeb nkab sab hauv) ua kom muaj zog ua rau muaj tshuaj lom neeg, uas yuav ua rau muaj kev ntxhov siab tawg.