Vim nws lub zog compressive siab thiab tus nqi qis, pob zeb yog cov khoom siv hauv tsev ntau tshaj plaws hauv kev tsim kho.Txawm li cas los xij, vim nws qhov loj me me, tawg yooj yim, tsis muaj kev cuam tshuam thiab lwm yam tsis zoo, nws txwv nws txoj kev loj hlob ntxiv.Kev siv cov organic hluavtaws fibers los hloov cov pob zeb tuaj yeem txhim kho lossis txhim kho qhov tawg ntawm cov pob zeb, txo cov tiam thiab kev loj hlob ntawm cov kab nrib pleb, thiab txhim kho cov kev ua tau zoo ntawm pob zeb tag nrho.
1.1 Txhim kho qhov tawg tsis kam ntawm pob zeb
Nyob rau hauv qhov tseeb kev tsim kho ntawm cov pob zeb, vim muaj cov dej noo ntau dhau, cov dej kub ntau yog tsim nyob rau hauv cov txheej txheem sib tov, cov yas shrinkage yog yooj yim tshwm sim nyob rau hauv cov txheej txheem ntawm pouring thiab tsim, qhuav tawg tshwm sim thaum poob dej thiab ziab, thiab kub shrinkage tawg tshwm sim vim qhov kub thiab txias hloov hauv theem hardening.Qhov tshwm sim ntawm cov kab nrib pleb no muaj kev cuam tshuam zoo rau cov khoom siv kho tshuab, impermeability thiab durability ntawm pob zeb.Ntxiv me me ntawm cov organic fiber ntau (feem ntau 0.05% ~ 1.0% ntawm qhov ntim ntawm pob zeb) rau pob zeb tuaj yeem txhim kho lossis txhim kho qhov tawg ntawm cov pob zeb.Vim hais tias cov organic fiber ntau yog cov tsis tshua muaj elastic modulus fiber ntau, cov fiber ntau nws tus kheej muaj qhov yooj yooj yim, thiab tuaj yeem faib tau zoo hauv cov pob zeb ua kom muaj kev sib txuas ntawm peb sab chaotic, uas tuaj yeem tiv thaiv qhov tshwm sim ntawm cov kab nrib pleb hauv cov txheej txheem molding, thiab vim tias cov fiber ntau muaj qee qhov adhesion rau pob zeb, fiber ntau bears lub tensile kev nyuaj siab los ntawm cov yas deformation ntawm cov pob zeb, yog li tiv thaiv kev loj hlob thiab kev loj hlob ntawm cov kab nrib pleb thaum ntxov, thiab ua kom zoo dua los yog txhim kho cov kab nrib pleb.
1.2 Txhim kho qhov impermeability ntawm pob zeb
Pob zeb yog cov khoom siv sib xyaw ua ke, muaj ntau qhov micropores ntawm cov aggregates, nrog rau ntau cov teebmeem capillary, thiab cov kab nrib pleb tsim los ntawm cov pob zeb qhuav thiab tawv tawv, uas txo cov impermeability ntawm pob zeb.Ntxiv ib qho me me ntawm cov organic fiber ntau rau cov pob zeb tuaj yeem faib tau zoo sib npaug thiab muaj qhov zoo adhesion rau cov pob zeb, uas txo lossis tiv thaiv kev tsim, kev loj hlob thiab kev loj hlob ntawm cov kab nrib pleb hauv cov pob zeb, tshwj xeeb tshaj yog zoo heev txo cov tiam ntawm kev sib txuas cov kab nrib pleb thiab txo cov dej seepage channel.Nyob rau tib lub sijhawm, hauv kev tsim cov txheej txheem ntawm cov pob zeb, kev sib koom ua ke ntawm cov fibers nce nws cov kev sib txuas nrog lub zog, kom cov khoom sib xyaw ua ke ntau dua tom qab molding, zoo txo cov tiam ntawm micro-permeability.Yog li ntawd, kev koom ua ke ntawm cov organic fibers rau hauv pob zeb ua tau zoo heev txhim kho nws cov impermeability.
Laizhou Kaihui Machinery Co., Ltd yog cov chaw tsim khoom lag luamqhob fiber ntau extrusion kab.Txais tos tiv tauj peb kom tau txais xov xwm ntxiv.
Post lub sij hawm: Nov-02-2022