Tus nqi delamination ntawm cov pos hniav ntawm cov pos hniav hauv folding cartons tau poob qis dua 1%-cov 4 yam tseem ceeb no tsis tuaj yeem tsis quav ntsej!
Cov hnab luam yeeb muaj lub luag haujlwm ntawm cov khoom lag luam, kev tiv thaiv cov khoom thiab tiv thaiv -cov ntaub ntawv pov thawj, thiab lawv cov txheej txheem raug thiab cov qauv zoo yog ntau dua li cov ntim khoom ib txwm. Raws li cov txheej txheem kawg ntawm cov luam yeeb ntim molding, lub zog ntawm cov nplaum txheej ncaj qha txiav txim siab cov qauv kev ruaj ntseg ntawm cov ntim luam yeeb nyob rau hauv tag nrho cov txheej txheem ntawm warehouses, tsheb thauj mus los thiab kev muag khoom. Raws li 2024 daim ntawv ntsuam xyuas cov ntaub ntawv ntawm Tobacco Packaging Professional Committee ntawm Tuam Tshoj Ntim Federation, cov seem ntawm cov khoom tiav los ntawm cov teeb meem ntawm gluing thawv hauv cov lag luam luam yeeb hauv tsev yuav ncav cuag qhov nruab nrab ntawm 5.7%, thiab qee qhov me me thiab nruab nrab - cov lag luam loj yuav ntau dua 15%, nrog rau kev lag luam ncaj qha txhua xyoo ntawm ntau tshaj 2 lab.
Tam sim no, muaj peb qhov kev mob tseem ceeb hauv kev tswj cov viscose ntawm cov luam yeeb ntim cov thawv ntim: ua ntej, kev xaiv cov nplaum yog nyob ntawm kev paub dhau los, thiab tsis muaj qhov sib txuam nrog cov ntaub ntawv tshwj xeeb rau cov ntim luam yeeb xws li cov ntawv xoob dej thiab hloov cov ntawv aluminized; thib ob, tsis muaj ntau tus qauv rau cov txheej txheem tsis xws li daim ntawv thov kua nplaum, kev ceev, thiab kev sib txuam; Thib peb, qhov kev teeb tsa ntawm qhov ntsuas kub kho tsis tsim nyog, ua rau cov nplaum tsis nkag mus rau daim ntawv fibers. Raws li qhov no, daim ntawv no siv cov teeb meem ntawm cov nplaum tsis ua haujlwm ntawm cov luam yeeb ntim cov thawv ntim cov thawv ntim khoom raws li qhov pib, thiab nthuav tawm cov txheej txheem tswj kom muaj nuj nqis thiab siv tau los ntawm plaub qhov ntev: kev xaiv nplaum, gluing txheej txheem parameter optimization, siab curing mob tswj thiab tag nrho cov txheej txheem kev tswj kom zoo, aiming los daws cov teeb meem ntau hauv kev lag luam.
Kev tshuaj xyuas cov ntsiab lus tseem ceeb ntawm kev ua tsis tiav ntawm cov luam yeeb ntim cov nplaum nplaum
01/ Tsis txaus cov nplaum ua haujlwm thiab daim ntawv hloov tau
Cov khoom saum npoo ntawm daim ntawv yog qhov tseem ceeb cuam tshuam rau kev sib txuas lus. Lub cev thiab tshuaj lom neeg cov khoom ntawm cov nplaum yog lub hauv paus ntawm cov nyhuv nplaum, thiab nws qhov kev hloov pauv tsis txaus rau cov ntawv ntim luam yeeb yog thawj qhov ua rau cov nplaum tsis ua haujlwm. Cov khoom saum npoo thiab cov qauv fiber ntau ntawm cov ntaub ntawv sib txawv yog qhov sib txawv, thiab cov kev xav tau rau kev ntub dej, permeability, thiab kho cov yam ntxwv ntawm cov nplaum yog txawv kiag li, thiab kev sib raug zoo ntawm cov ntaub ntawv sib txawv thiab cov nplaum yog qhia hauv Table 1.
02/ Cov txheej txheem gluing tsis muaj kev tswj hwm
Cov txheej txheem gluing yog qhov txuas tseem ceeb ntawm kev tswj cov nplaum, thiab kev tswj tsis tau ntawm peb qhov tsis ua haujlwm ntawm daim ntawv thov kua nplaum, cov kua nplaum sib xws thiab cov nplaum daim ntawv thov ceev yog qhov tseem ceeb rau qhov tsis ua tiav ntawm cov nplaum.
(1) Tus nqi ntawm cov kua nplaum siv yog tsis tsim nyog
Thaum cov kua nplaum tsis txaus, cov nplaum tsis tuaj yeem npog tag nrho cov nplaum nplaum ntawm daim ntawv, cov ntsiab lus sib txuas ntawm cov fibers raug txo, thiab cov nplaum nplaum yuav txo qis. Kev siv cov kua nplaum ntau dhau yuav ua rau "kua nplaum dhau", ua rau lub ntsej muag ntawm lub ntim luam yeeb, thiab cov nplaum ntau dhau yog yooj yim los tsim npuas thaum kho, tab sis txo cov nplaum nplaum, noj 232g / m² laser hloov daim ntawv ua piv txwv, kev sib raug zoo ntawm cov kua nplaum thiab tev lub zog yog qhia hauv Table 2.
Table 2 Kev sib raug zoo ntawm cov kua nplaum ntau thiab tev lub zog
(2)Glue Coating Uniformity tsis phim qhov ceev
Lub uniformity ntawm cov nplaum txheej ncaj qha cuam tshuam qhov kev ntxhov siab ntawm cov nplaum txheej. Yog tias muaj 'tsis nco qab cov kua nplaum' ntawm qhov chaw coated, lub zog adhesion nyob rau hauv qhov chaw yog xoom, ua rau nws tsis muaj zog taw tes rau delamination. Noj 232g / m² laser hloov daim ntawv nrog cov kua nplaum txheej ntawm 7g / m² ua piv txwv, cov nyhuv ntawm txheej ceev ntawm cov txheej txheem ntsuas tau qhia hauv Table 3.
Table 3 Cov nyhuv ntawm cov nplaum txheej ceev ntawm cov txheej txheem qhia
03/ Pressurization thiab curing tej yam kev mob tsis raws li tus qauv
Pressurization thiab kho tom qab folding lub thawv yog ib kauj ruam tseem ceeb rau cov nplaum los tsim cov txheej txheem ruaj khov. Lub siab tsis txaus lossis lub sijhawm luv luv tuaj yeem ua rau cov nplaum tsis tuaj yeem nkag mus rau hauv cov fibers lossis tshem tawm cov npuas dej, ua rau muaj qhov tsis zoo hauv microscopic voids hauv cov txheej txheem sib txuas thiab thaum kawg ua rau delamination.
04/ Kev cuam tshuam tsis ncaj ntawm ib puag ncig yam
Qhov kub thiab av noo ntawm qhov chaw tsim khoom tuaj yeem cuam tshuam ncaj qha rau cov nplaum ua haujlwm. Tsawg heev kub (<18°C) reduces the adhesive's fluidity and slows down the curing process; too high a humidity (>65%) ua rau daim ntawv nqus dej noo, fiber ntau nthuav dav, muaj zog ntxiv rau cov nplaum nplaum, thiab lub sijhawm kho ntev ntev; tsawg heev humidity (<40%) causes the adhesive surface to dry quickly while the interior is not fully cured, resulting in a "false tack" phenomenon. Changes in the delamination rate of cigarette cartons under different temperature and humidity conditions are shown in Figure 1.
Fig.1 Kev hloov pauv ntawm tus nqi degumming ntawm cov ntim luam yeeb nyob rau hauv qhov sib txawv ntawm qhov kub thiab txias
Optimization scheme rau viscose tswj ntawm luam yeeb ntim kua nplaum lub thawv
01/ Adhesive xaiv lub tswv yim raws li daim ntawv cov khoom
Lub hauv paus ntsiab lus tseem ceeb ntawm kev xaiv nplaum yog kom ua tiav "wettability adaptation, permeability adaptation, thiab curing yam ntxwv adaptation", thaum coj mus rau hauv tus account qhov yuav tsum tau ntawm kev siv ib puag ncig, nqi thiab kev tiv thaiv ib puag ncig, thiab tsim ib tug scientific xaiv system, lub tswv yim xaiv tshwj xeeb yog raws li nram no.
(1) Tsim nyog xaiv raws li hom ntawv
Cov qauv saum npoo, lub cev thiab cov khoom siv tshuaj lom neeg ntawm cov ntawv ntim luam yeeb sib txawv yog qhov sib txawv, thiab hom thiab qhov tsis sib xws ntawm cov nplaum yuav tsum tau ua kom haum raws li lub hom phiaj.
(1) Coated ntawv: du nto thiab tuab tuab txheej, nyiam dua xaiv cov dej hloov pauv -raws li nplaum nplaum nrog viscosity ntawm 1800 ~ 2000mPa·s. Cov surfactant nws muaj tuaj yeem txo lub kaum sab xis ntawm 45℃mus rau 28℃los txhim kho wettability; Qhov ntxiv penetrant tuaj yeem tawg los ntawm kev thaiv ntawm txheej txheej number case, nce qhov tob tob ntawm 52μm mus rau 75μm, thiab lub zog nplaum ncav cuag 2.65N / cm, uas yog siab dua li cov dej sib xyaw ua ke -raws li adhesives.
(2) Hloov laser aluminium plating cardboard: cov txheej hlau saum npoo ua rau cov dej tsis zoo, thiab cov dej tshwj xeeb -raws li cov nplaum uas muaj cov neeg sib txuas yuav tsum raug xaiv, los ntawm cov tshuaj sib txuas ntawm cov hlau txheej thiab cov nplaum yog tsim los txhim kho lub zog sib txuas, kom lub kaum sab xis sib cuag raug txo los ntawm 78℃mus rau 32℃penet 8, thiab qhov tob ntawm 78℃rau 32 μm. Yog tias siv cov nplaum nplaum, qhov kub yuav tsum tau tswj ntawm 90 ~ 100℃kom ntseeg tau tias cov nyhuv ntub dej ntawm txheej.
(3) Cov ntawv xoob dej: xoob fibers, yooj yim nqus dej, nyiam xaiv cov nplaum nplaum nrog lub melting point ntawm 120 ~ 130 degree, nws qhov kev kho ceev ceev, tuaj yeem zam tsis txhob ya raws thiab deformation ntawm daim ntawv, qhov tob nkag mus txog ntau dua 48μm, thiab cov nplaum nplaum yog ntau dua los yog sib npaug rau 3.0N. Cov ntaub ntawv sim tau pom tias cov nplaum nplaum nplaum ntawm 160℃yog 3.2N / cm, uas yog ntau dua li ntawm 2.1N / cm ntawm 140 degree.
(4) Corrugated luam yeeb pob hauv ob sab phlu: cov qauv ntxeem tau, loj tuab, siab permeability nplaum raug xaiv, thiab kev kho ceev yog tswj ntawm 3 ~ 5s los xyuas kom meej tias cov nplaum txheej nkag mus rau hauv qhov sib txawv ntawm corrugated thiab tsim cov qauv ruaj khov.
(2) Kev sib xyaw ua ke ntawm kev xaiv ib puag ncig hloov pauv
Thaum lub sij hawm cia thiab kev thauj mus los ntawm cov ntim luam yeeb, nws yuav ntsib qhov kub thiab txias ib puag ncig, thiab cov nplaum yuav tsum muaj cov huab cua sib xws.
(1) Cov chaw kub thiab cov av noo siab nyob rau sab qab teb: xaiv cov dej noo- cov dej hloov kho tsis zoo-raws li cov nplaum nplaum thiab ntxiv cov kab mob mildew inhibitors kom ntseeg tau tias cov nplaum nplaum tuav lub zog ntau dua lossis sib npaug li 90% nyob rau hauv cov av noo ntawm 80% thiab qhov kub ntawm 35 degree, kom tsis txhob degumming ntawm cov dej los ntawm cov mos mos.
(2) Qhuav thiab qis- qhov kub thiab txias nyob rau sab qaum teb: xaiv qis - cov nplaum nplaum nplaum, ua kom zoo rau cov qauv tsim qauv, tsis txhob brittleness thiab tawg ntawm cov nplaum txheej ntawm qhov kub thiab txias, thiab tuav lub zog nplaum ntawm -10℃ntawm ntau dua los yog sib npaug rau 85% kom ruaj khov nyob rau hauv qhov chaw qis.
(3) Cov hnab luam yeeb uas yuav tsum tau laminated ntawm qhov kub thiab txias: xaiv qhov siab -kub resistant nplaum (kub tsis kam siab tshaj los yog sib npaug li 120 degree) los tiv thaiv cov softening thiab tsis ua hauj lwm ntawm cov nplaum txheej los ntawm cov txheej txheem lamination, thiab xyuas kom ntev - lub sij hawm ruaj khov ntawm cov nplaum ua haujlwm.
(3) Tus nqi sib npaug thiab kev tiv thaiv ib puag ncig
Ntawm qhov chaw ua tau raws li qhov yuav tsum tau ua, tsim kom muaj kev ntsuam xyuas dual ntawm "tus nqi ua haujlwm thiab kev tiv thaiv ib puag ncig":
(1) Kev tiv thaiv ib puag ncig kev ntsuas ntsuas: VOCs cov ntsiab lus ntawm dej-raws li cov nplaum yuav tsum tsawg dua lossis sib npaug li 50g / L, uas ua raws li GB 38508-2020 "Volatile Organic Compound Content Limits of Cleaning Agents"; Halogen- cov khoom lag luam tsis muaj pa luam yeeb thiab tsawg yog nyiam rau cov nplaum kom tsis txhob muaj cov pa phem uas tshwm sim thaum lub sijhawm tsim khoom thiab ua kom muaj kev nyab xeeb ntawm qhov chaw ua haujlwm.
(2) Kev ua kom zoo tshaj tus nqi: Txawm hais tias chav tsev tus nqi tshwj xeeb hloov cov nplaum yog li 15% siab dua li cov khoom lag luam, nws tuaj yeem txo tus nqi degumming thiab txo cov kev poob haujlwm. Kev siv tswv yim ntawm kev lag luam qhia tau hais tias tom qab siv cov dej tshwj xeeb hloov kho-raws li cov nplaum, cov nqi tsim khoom tau raug txo los ntawm 8%, ua tiav qhov yeej- yeej qhov xwm txheej zoo thiab ua haujlwm tau zoo.
02/ Quantitative optimization ntawm gluing txheej txheem
(1) Txiav txim siab qhov zoo tshaj plaws ntawm daim ntawv thov kua nplaum
Cov qauv gluing meej meej yog tsim rau cov ntawv sib txawv, thiab "daim ntawv thov cov kua nplaum tseem ceeb" (qhov tsawg kawg nkaus ntawm cov kua nplaum siv thaum lub tev lub zog pib stabilize) thiab "qhov zoo tshaj plaws ntawm cov kua nplaum" ntawm txhua daim ntawv yog txiav txim siab los ntawm kev sim.
(1) Coated ntawv: qhov tseem ceeb gluing tus nqi yog 5g / m², thiab qhov zoo tshaj plaws yog 5 ~ 7g / m². Nyob rau hauv qhov ntau, cov nplaum tuaj yeem npog tag nrho cov nplaum nplaum, tsim cov nplaum nplaum zoo ib yam, lub tev lub zog yog ruaj khov ntawm 2.4 ~ 2.65N / cm, thiab tus nqi ntws yog tswj hauv qab 0.5%.
(2) Hloov aluminized cardboard: qhov tseem ceeb gluing npaum li cas 6g / m², pom ntau 6 ~ 8g / m². Cov ntaub ntawv sim tau pom tias thaum cov kua nplaum ntawm daim ntawv yog 3 ~ 6g / m², lub zog tev tau nce linearly nrog qhov nce ntawm daim ntawv thov kua nplaum, los ntawm 1.2N / cm rau 2.5N / cm. Lub zog tev tawm hauv thaj tsam ntawm 6 ~ 8g / m² zoo li ruaj khov, ntawm 2.5 ~ 2.65N / cm. Tom qab ntau tshaj 8 g / m², lub tev lub zog poob qis me ntsis thiab cov dej ntws tau nce ntxiv, los ntawm 0.5% mus rau 8%.
(3) Cov ntawv xoob dej: cov kua nplaum tseem ceeb yog 5g / m², thiab qhov zoo tshaj plaws yog 5 ~ 7g / m², uas tuaj yeem ua kom ntseeg tau tias cov nplaum nplaum muaj zog ntau dua lossis sib npaug li 3.0N / cm3, thiab tib lub sijhawm kom tsis txhob muaj kuab paug paug.
Thaum lub sij hawm tsim cov txheej txheem, cov kua nplaum tau raug tswj xyuas kom raug los ntawm kev kho qhov sib txawv ntawm cov gluing cov menyuam (qhov tseeb ± 0.01mm), nruab nrog cov khoom siv kua nplaum online, tiag tiag - lub sijhawm saib xyuas thiab cov ntaub ntawv tawm tswv yim, thiab yuav ceeb toom thaum qhov sib txawv tshaj ± 0.5g / m² kom ntseeg tau tias cov kua nplaum yog ib txwm nyob rau hauv qhov kev pom zoo.
(2) Optimize lub gluing ceev thiab uniformity
Daim ntawv thov ceev thiab uniformity ncaj qha cuam tshuam rau cov ntub dej thiab nkag mus ntawm cov nplaum rau ntawm daim ntawv, thiab kev tswj kom meej yog yuav tsum tau los ntawm cov txheej txheem sib txuam thiab cov cuab yeej optimization.
(1) Cov nplaum daim ntawv thov ceev sib piv: Raws li hom nplaum, tus qauv nrawm yog tsim, thiab cov dej -raws li daim ntawv thov ceev yog tswj ntawm 50 ~ 70m / min, thiab daim ntawv thov ceev yog tswj ntawm 60 ~ 80m / min kom ntseeg tau tias cov nplaum muaj lub sij hawm ntub dej txaus rau ntawm daim ntawv los yog sib npaug ntawm 0). Cov ntaub ntawv kuaj teb qhia tau hais tias thaum lub gluing ceev ntawm dej-raws li nplaum nplaum yog nce los ntawm 60m / min mus rau 90m / min, qhov tsim nyog tus nqi ntawm gluing uniformity txo los ntawm 98% mus rau 75%, thiab degumming tus nqi nce los ntawm 1.2% mus rau 5.8%, uas txheeb xyuas qhov tseem ceeb ntawm kev sib tw ceev.
(2) Kev ua kom zoo ntawm gluing rollers: Txais cov cuab yeej siv anilox rau cov menyuam gluing, xaiv tus naj npawb ntawm cov mesh raws li hom ntawv, txhim kho cov kua nplaum thiab permeability, thiab xyuas kom meej tias tsis muaj qhov xau los yog txuam rau ntawm cov nplaum nplaum.
(3) Kev tu thiab tu: Tsim ib lub voj voog tu nruj rau cov menyuam gluing, thiab ua kom huv si tom qab txhua qhov kev ua haujlwm ntawm kev tsim khoom los tiv thaiv qhov qhuav ntawm cov kua nplaum los ntawm kev cuam tshuam cov nyhuv gluing tom ntej. Tom qab ntxuav, cov qauv qauv siv los txheeb xyuas qhov sib xws ntawm gluing, thiab tus nqi dhau ntau dua lossis sib npaug li 98% ua ntej pib tsim khoom, ua kom muaj kev ruaj ntseg ntawm cov txheej txheem los ntawm qib ntawm kev tu cov cuab yeej.
03/ Standardization ntawm lub siab curing txheej txheem
Kev kho siab yog ib kauj ruam tseem ceeb hauv kev tsim cov nplaum nplaum ruaj khov los ntawm cov nplaum, thiab nws yog ib qho tsim nyog los tsim ib qho peb -qhov txheej txheem txheej txheem ntawm "siab- sij hawm- kub", thaum ua kom zoo rau qhov chaw kho kom zoo los xyuas kom zoo ntawm kev sib txuas.
(1) Standardization ntawm pressurization tsis
Raws li cov ntaub ntawv pov thawj hauv chaw soj nstuam, tus qauv dav dav rau cov txheej txheem siab ntawm cov luam yeeb ntim kua nplaum yog tsim, thiab nws tau hloov kho raws li qhov tuab ntawm daim ntawv.
(1) Siab: Tus qauv siab ntau yog 0.4 ~ 0.6MPa, sab sauv txwv (0.5 ~ 0.6MPa) rau cov ntawv tuab (xws li corrugated ntawv hauv ob sab phlu) thiab qis qis (0.4 ~ 0.5MPa) rau cov ntawv nyias (xws li hloov cov ntawv aluminized) kom paub meej tias cov nplaum nkag mus rau hauv cov fiber ntau. Cov kev sim qhia tau hais tias thaum lub siab nce ntawm 0.3MPa mus rau 0.5MPa, lub zog shear nce los ntawm 4.1N / mm² mus rau 5.2N / mm², thiab cov txiaj ntsig kev txhim kho tseem ceeb.
(2) Pressurization lub sij hawm: dej -raws li nplaum pressurized rau 3 ~ 5s, nplaum pressurized rau 2 ~ 3s, thiab cov ntsiab lus tseem ceeb yog lub sij hawm pressurization ntau dua los yog sib npaug rau 3s. Cov ntaub ntawv qhia tau hais tias ntawm 0.5MPa siab, thaum lub sij hawm pressurization nce ntawm 1s mus rau 3s, lub zog shear jumps ntawm 2.1N / mm² mus rau 5.2N / mm², nce ntawm 147.6%. Lub zog shear loj hlob qeeb nyob rau hauv thaj tsam ntawm 3 ~ 5s, qhia tias 3s tuaj yeem ua tau raws li cov kev xav tau yooj yim.
③ Nias Kub: Dej-raws li cov nplaum nplaum yog nias ntawm chav tsev kub, nrog cov nplaum nias kub tswj ntawm 40-50℃. Cov cua kub nruab nrab accelerates cov txheej txheem kho thiab txhim kho kev sib raug zoo.
High-precision siab sensors thiab timers raug ntsia rau ntawm cov kab ntau lawm los saib xyuas cov txheej txheem nias ntawm txhua lub thawv hauv lub sijhawm tiag tiag-, kom ntseeg tau tias tsis muaj raws li cov qauv thiab tiv thaiv delamination los ntawm kev nias tsis raug.
(2) Kev Tswj Ib puag ncig
Cov hnab luam yeeb nplaum tau muab tso rau hauv qhov kub thiab txias - thiab av noo-chaw tswj (kub 20–25 degree, av noo 50%–60%) rau kev kho. Lub sijhawm kho yuav tsum tsis pub tsawg tshaj 24 teev rau dej-raws li cov nplaum lossis 12 teev rau lwm cov nplaum. Tom qab kho, lub zog nplaum raug kuaj ntawm cov qauv, thiab tsuas yog cov pob khoom tsim nyog tuaj yeem mus rau cov txheej txheem tom ntej. Cov qauv ntsuas yog: cov ntawv coated thiab hloov pauv-metallized ntawv tev lub zog Ntau dua lossis sib npaug li 2.5 N / cm, ntoo-dawb daim ntawv tev lub zog Ntau dua lossis sib npaug rau 3.0 N / cm, thiab lub zog shear Ntau dua lossis sib npaug li 5.0 N / mm².
Kev tswj cov kua nplaum rau cov ntim luam yeeb yog txheej txheem txheej txheem uas muaj kev xaiv cov khoom siv raw, txheej txheem parameter optimization, kev tswj ib puag ncig, thiab kev tshuaj xyuas zoo. Nws lub ntsiab lus yog nyob rau hauv kev ua tiav qhov sib txuam ntawm "cov nplaum- ntawv- txheej txheem". Cov txheej txheem xaiv cov nplaum raws li cov yam ntxwv ntawm daim ntawv, cov txheej txheem gluing ntau yam, cov txheej txheem nias thiab kho, thiab tag nrho - txheej txheem tswj kev ua tau zoo hauv daim ntawv no tau raug kuaj xyuas kom zoo txo cov ntim luam yeeb kom qis dua 1%, txhim kho qhov ruaj khov ntawm cov khoom zoo.