Hauv lub sijhawm ntev - siv cov yeeb yaj kiab stretch, ntau cov ntsiab lus thiab kev nkag siab ncaj qha cuam tshuam rau kev ntim khoom thiab tus nqi. Cov kev paub dhau los tau qhia peb tias nws tsis yog ib qho yooj yim wrapping khoom; Ua tib zoo saib xyuas cov txheej txheem, xaiv cov khoom siv, thiab kev txiav txim siab ntawm qhov xwm txheej yog qhov tseem ceeb rau kev ua tiav kev ruaj ntseg thiab kev tiv thaiv kev lag luam.
Ua ntej, xaiv cov khoom siv yuav tsum yog raws li qhov xav tau tiag tiag. Stretch films sib txawv thicknesses, cov ntaub ntawv, thiab kev ua haujlwm yog haum rau ntau yam sib txawv scenarios. Piv txwv li, nyob rau hauv cov txheej txheem logistics nrog nquag tuav, siv linear low - ntom polyethylene zaj duab xis nrog siab elongation thiab zoo resilience tuaj yeem txo qhov poob los ntawm kev rov qhwv dua; thaum nyob rau hauv cov khoom ntim hnyav uas yuav tsum tau muaj kev sib tsoo, qhov rigidity ntawm siab - ntom polyethylene zaj duab xis yog qhov zoo dua los tiv thaiv kev puas tsuaj. Kev paub qhia peb tias rau kev yuav khoom thawj zaug, nws raug nquahu kom ua qhov me me - batch sim ua ntej, soj ntsuam kev ua haujlwm nyob rau hauv qhov sib txawv ntawm qhov kub, qhov av noo, thiab cov loads ua ntej txiav txim siab cov ntsiab lus tseem ceeb. Qhov no zam qhov muag tsis pom kev nrhiav tus nqi qis ntawm tus nqi ntawm kev ntseeg siab.
Qhov thib ob, kev paub txog lub zog wrapping thiab kev sib dhos yog qhov tseem ceeb. Ntau tus neeg ntseeg tias kev nruj dua yog kev nyab xeeb dua, tab sis kev quab yuam ntau dhau tuaj yeem tsis tsuas yog rhuav tshem cov yeeb yaj kiab xwb tab sis kuj ua rau cov khoom ntim khoom puas tsuaj lossis ua rau cov yeeb yaj kiab ua tsis tiav thaum ntxov ntawm qhov kev ntxhov siab. Cov neeg muaj kev paub dhau los yuav maj mam rub cov yeeb yaj kiab thaum pib los xyuas kom meej qhov adhesion du, tuav ruaj khov nyob rau hauv nruab nrab, thiab me ntsis zawm nws thaum kawg. Qhov no tsim cov ntaub qhwv uas muaj kev ruaj ntseg txaus thiab tsis tshua muaj kev tsim kua muag vim muaj kev ntxhov siab ntau. Thaum txhais tes- qhwv, lub cev tig los yog lub tshuab tig tuaj yeem siv los siv lub zog sib npaug. Rau lub tshuab wrapping, qhov ua ntej -stretch ratio yog zoo-tuned raws li qhov hnyav thiab cov duab ntawm cov khoom kom ntseeg tau tias cov zaj duab xis yog stretched.
Kev paub txog kev hloov pauv ib puag ncig yog qhov tseem ceeb sib npaug. Nyob rau sab nraum zoov lossis tsev khaws khoom ib puag ncig uas muaj qhov sib txawv ntawm qhov kub thiab txias, cov yeeb yaj kiab zoo tib yam yuav ua rau embrittlement lossis txo adhesion. Siv cov yeeb yaj kiab nrog kev tiv thaiv UV lossis qis - qhov kub thiab txias tuaj yeem ua rau lawv lub neej kev pab cuam ntev. Thaum lub caij tsheb thauj mus los los nag, ua ntej siv cov dej noo- pov thawj lev rau saum npoo ntawm cov khoom qhwv ua ntej muab khi nrog zaj duab xis ncab kom ua ob npaug - thaiv kev nkag mus ntawm noo noo. Rau cov khoom siv hluav taws xob zoo li qub -sensitive electronics, kev paub qhia peb kom siv los tiv thaiv- zaj duab xis zoo li qub thiab siv qis- nrawm, qis- nro wrapping kom txo tau qhov kev pheej hmoo ntawm kev tsim nqi.
Tus yuam sij rau txuag cov ntaub ntawv yog nyob rau hauv kev tswj qhov sib tshooj piv. Kev paub qhia tau hais tias qhov sib tshooj ntawm ib ncig ntawm 50% cuam tshuam qhov sib npaug ntawm kev ruaj ntseg thiab cov khoom txuag. Kev sib tshooj siab dhau ua rau cov khoom siv ntxiv, thaum qhov sib tshooj tsawg dhau ua rau cov ntaub qhwv tuaj yeem xoob. Thaum siv lub tshuab, lub pre-stretch muaj nuj nqi yuav siv tau los ua kom cov kev pab cuam ntev ntawm ib yob ntawm zaj duab xis. Ua ke nrog tus naj npawb tsim nyog ntawm cov ntaub qhwv, qhov no txo qis cov nqi ntim khoom. Rau cov khoom uas muaj cov duab nyuaj, thawj qhov chaw ruaj ntseg hauv cov ntu ua ntej qhwv tag nrho cov yob; qhov no zam cov yeeb yaj kiab pov tseg thiab rov ua haujlwm dua.
Lwm cov lus qhia uas feem ntau tsis saib xyuas yog qhov kev txheeb xyuas tiav. Txawm hais tias siv tes los yog tshuab, tom qab ua tiav, xyuas seb cov zaj duab xis nto yog tiaj tus thiab cov seams ruaj ntseg, tshwj xeeb tshaj yog nyob rau sab saum toj thiab hauv qab, vim tias cov cheeb tsam no feem ntau ua rau xoob vim tsis saib xyuas. Kev tsim tus cwj pwm no tuaj yeem txo qis kev ua haujlwm thiab kev puas tsuaj thaum lub sijhawm thauj mus los.
