Kuv tau nyob hauv kev lag luam no ntau tshaj kaum xyoo, thiab kuv tsis tuaj yeem qhia koj tias pes tsawg zaus kuv tau txais qhov kev hu no: "Peb tau teeb tsa koj tus neeg sib tw cov ntaub thaiv peb lub hlis dhau los, thiab lawv twb tawg lawm. Koj puas tuaj yeem pab tau?"
Cov lus teb yuav luag ib txwm zoo ib yam - thiab nws tsis yog hais txog hom. Nws yog hais txog lub plasticizer.
Cia kuv piav.
Qhov teeb meem tiag
Ib tug neeg hu kuv tuaj. Nws khiav qhov chaw txias txias ntawm -25 degree. Nws yuav cov qauv PVC kab hlau rhuav los ntawm ib tus neeg muag khoom hauv zos. Hauv ob lub hlis, cov strips pib tawg ntawm cov npoo. Cov me me tau tawg. Lub forklift tau dhau mus, thiab ib txoj hlua tawg tau tawg zoo li iav.
Nws xav tias nws tau txais ib pab pawg phem. Nws tau txiav txim hloov los ntawm tib tus neeg muag khoom. Tib yam tshwm sim.
Nws hu kuv. Kuv nug ib lo lus nug: "Yuav ua li cas plasticizer nyob rau hauv cov strips?"
Nyob ntsiag to.
Nws tsis paub. Nws tus neeg muag khoom kuj tsis paub thiab.
Qhov ntawd yog qhov teeb meem.
Yog vim li cas Standard PVC tsis nyob rau hauv txias
Ntawm no yog qhov tsis muaj leej twg qhia koj thaum koj yuav cov ntaub thaiv kab hlau rhuav: PVC yog ib qho nyuaj, nkig yas. Nws tsuas yog muag thiab hloov tau vim yog cov yas yas - cov tshuaj uas tau sib xyaw rau hauv PVC kom nws ua haujlwm tau.
Qhov teeb meem yog, tsis yog txhua tus plasticizers ua tib yam ntawm qhov kub thiab txias.
Txhua lub plasticizer muaj qhov hu ua iav hloov pauv kub (Tg). Qhov ntawd yog qhov kub hauv qab no uas cov khoom siv los ntawm cov mos mos thiab rubbery mus rau tawv thiab iav. Xav txog nws zoo li butter hauv lub tub yees - mos ntawm chav tsev kub, nyuaj thaum txias.
Plasticizer Hom Brittle Point Dab tsi tshwm sim ntawm -25 degree
DEHP / DOP -10℃Pob zeb nyuaj. Kev tawg ntawm kev cuam tshuam.
DOTP -15℃rau -20℃Tseem nkig. Tsis zoo txaus.
DOA -40℃rau -50℃Nyob hloov tau. Ua haujlwm.
DOS -60℃Zoo heev. Kev xaiv hwm.
Feem ntau cov ntaub thaiv pheej yig siv DEHP lossis DOP. Qee cov neeg muag khoom siv DOTP thiab hu nws "qib lub freezer." Tsis yog.
Ntawm -25 degree, DOTP tseem yog 5-10 degrees hauv qab nws cov ntsiab lus nkig. Nws yuav tawg.
Tsuas yog DOA lossis DOS cov yas yas kom PVC hloov tau yooj yim hauv lub freezer tiag tiag.
Feem ntau cov neeg muag khoom yuav tsis qhia koj
Kuv tau pom cov neeg muag khoom muag "freezer-qib" curtains uas tsis muaj dab tsi ntau tshaj li cov qauv strips nrog cov ntsiab lus yas siab dua me ntsis. Lawv dhau ntawm -5 degree, tej zaum txawm -10 degree. Tab sis muab lawv tso rau hauv ib lub freezer tiag tiag, thiab lawv ua tsis tiav.
Vim li cas cov neeg muag khoom ua qhov no?
Vim tias DOA thiab DOS yog kim, lawv tuaj yeem raug nqi ob mus rau peb zaug ntau npaum li cov qauv yas. Yog li qee tus neeg muag khoom txiav cov ces kaum. Lawv tsuas yog siv DOA txaus kom dhau qhov kev sim yooj yim, tab sis tsis txaus los ua qhov ntev - lub sijhawm.
Nov yog qhov kuv qhia kuv cov neeg siv khoom:
Tsis txhob tso siab rau daim ntawv lo. Nug peb yam:
1. Lub hom phiaj yas yas- tsis yog "freezer qib." Kuv xav pom "DOA" lossis "DOS" ntawm daim ntawv spec.
2. Daim ntawv qhia txog qhov ntsuas kub ntawm brittleness- ASTM D746 lossis sib npaug. Nws yuav tsum yog tsawg kawg 10℃hauv qab koj qhov kev ua haujlwm kub.
3. Ib qho qauv koj tuaj yeem kuaj koj tus kheej- Muab pov rau hauv koj lub freezer thaum hmo ntuj. Khoov nws tag kis. Yog nws tawg, xa rov qab.
Yog tias tus neeg muag khoom tsis muab peb yam no rau koj, taug kev mus.
Kev Tshawb Fawb Txog Kev Tshawb Fawb
Xyoo tas los, ib lub chaw ua zaub mov hauv Northern Europe tau hu rau peb. Lawv tau hloov lawv lub freezer curtains txhua 4-6 lub hlis. Lawv tus thawj saib xyuas tu tau ntxhov siab. Nws tau sim peb tus neeg xa khoom sib txawv. Txhua yam ua tsis tiav.
Peb xa nws ib qho piv txwv ntawm peb DOA-raws li arctic- qib strip. Nws muab tso rau hauv nws lub freezer -30℃rau ib lub lim tiam. Ces nws khoov nws. Nws flexed zoo li ib tug roj hmab band.
Qhov txawv? Peb siv DOA plasticizer system uas nyob twj ywm hloov mus rau -40℃. Nws raug nqi ntau dua ua ntej. Tab sis nws txuag nyiaj vim nws tsis hloov lawv txhua ob peb lub hlis.
Lwm yam uas ua rau nws phem
Txias ib leeg tsis tua cov ntaub thaiv no. Feem ntau nws yog kev sib xyaw ua ke ntawm yam:
1.Pheej yig fillers.Qee lub tuam txhab ntxiv calcium carbonate kom txo nqi. Nws ua rau PVC tawv thiab nkig ntau dua, tshwj xeeb tshaj yog thaum txias. Yog tias daim ntawv qhia tshwj xeeb hais txog "cov ntsiab lus sau," yuav ua rau tsis txaus ntseeg.
2. Cov khoom siv rov ua dua tshiab.Recycled PVC muaj cov ntsiab lus ntawm cov yas yas tsis tuaj yeem. Koj yeej tsis paub dab tsi koj tau txais. Hauv kev cia txias, qhov no yog ib daim ntawv qhia rau kev puas tsuaj.
3. UV raug.Yog tias koj lub freezer muaj qhov rais lossis nyob ze ntawm qhov chaw thau khoom nrog lub hnub ci, UV degrades cov plasticizers dhau sijhawm. Txawm tias arctic - qib PVC nws thiaj li poob yooj. UV- cov qhab nia ruaj khov pab.
4. Hnub nyoog.Tsis muaj dab tsi nyob mus ib txhis. Txawm tias qhov zoo tshaj plaws arctic - cov ntaub thaiv qib yuav pib tawv tom qab 3-4 xyoo. Tab sis qhov ntawd yog kev quaj deb ntawm 3 lub hlis.
Yuav Nrhiav Dab Tsi Thaum Yuav
Thaum koj tab tom nrhiav PVC strip curtains rau txias cia, ntawm no yog kuv daim ntawv teev npe:
Yuav Nug Vim Li Cas Nws Tseem Ceeb
Dab tsi yog plasticizer siv? Yuav tsum yog DOA lossis DOS rau qis dua -20 degree
Qhov kub ntawm brittleness yog dab tsi? Yuav tsum muaj tsawg kawg yog 10℃hauv qab koj qhov kev khiav haujlwm temp
Puas yog cov khoom siv nkauj xwb? Tsis muaj cov ntsiab lus rov siv dua
Cov ntsiab lus muab tub lim yog dab tsi? Qhov qis dua yog qhov zoo dua rau kev hloov pauv txias
Kuv puas tuaj yeem tau txais daim ntawv xeem? ASTM D746 los yog sib npaug
Kuv puas tuaj yeem tau txais tus qauv? Kuaj koj tus kheej hauv koj lub freezer
Installation tseem ceeb heev
Txawm tias qhov zoo tshaj plaws kab hlau rhuav yuav ua tsis tau yog tias ntsia tsis raug.
Tsis txhob dhau -ntsuas cov ntsia liaj qhov rooj. Cov ntsiab lus kev ntxhov siab ntawm lub qhov ua tawg qhov chaw pib thaum lub caij txias.
Siv cov khoom siv stainless hlau. Cov hlau tsis tu ncua rusts nyob rau hauv qhov chaw txias, ntub dej.
Cia qhov sib txawv me me ntawm hauv pem teb. Ice buildup tuaj yeem rhuav cov strips thaum lawv rub.
Ntxuav nrog xab npum me me xwb. Solvents strip plasticizers tawm sai dua.
Kev xav zaum kawg
Yog tias koj cov ntaub thaiv PVC strips tawg thaum lub caij txias, qhov teeb meem yog yuav luag txhua qhov system yas. Standard PVC - txawm DOTP - yuav ua tsis tau nyob rau hauv lub freezers sib sib zog nqus. Koj xav tau DOA lossis DOS.
Tsis txhob txais "qib lub freezer" raws li qhov tshwj xeeb. Nug rau hom plasticizer pes tsawg, daim ntawv qhia txog qhov ntsuas kub ntawm brittleness, thiab cov qauv koj tuaj yeem kuaj koj tus kheej.
Thiab yog tias koj tus neeg muag khoom tsis tuaj yeem teb cov lus nug no? Nrhiav tus neeg xa khoom tshiab.
