Sib tham txog kev sau ntawv, kev faib tawm thiab kev siv kub ntxhua nplaum
Peb yog ib lub tuam txhab luam ntawv loj hauv Shenzhen Tuam Tshoj. Peb muaj cov phau ntawv luam tawm, phau ntawv xov xwm luam ntawv, phau ntawv luam ntawv, phau ntawv nyuaj, phau ntawv luam tawm, phau ntawv luam tawm, phau ntawv luam tawm, lub thawv ntim, daim qhia ntawv, txhua yam ntawm PVC, cov ntawv luam tawm, ntawv sau cia, hom tshwj xeeb ntawv xim luam tawm khoom, kev ua si cardand li ntawd.
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1. Qhov yooj yim muaj pes tsawg leeg thiab kev ua haujlwm ntawm kub yaj nplaum
EVA kub melt nplaum yog ib qho khoom, fusible polymer uas tsis tas yuav hnyav lossis ya raws. EVA kub qhuav nplaum yog khoom ntawm qhov kub, thiab rhaub mus rau ib qho kub los ua kua uas muaj peev xwm khiav thiab muaj ib yam viscosity. EVA hot melt adhesives feem ntau muaj xws li plaub yam hauv qab no.
1) EVA resin
EVA resin yog nws lub ntsiab tivthaiv, uas pom cov khoom ntawm cov tawv kub yaj, xws li daim ntawv cog qoob loo, ntsuas kub, tensile zog, kub ua haujlwm thiab deformation zog.
2) Tackifier
Nws yog lub ntsiab lus tseem ceeb. Nyob rau hauv rooj plaub ntawm tsuas yog EVA resin, txawm hais tias lub kua nplaum muaj qee cov quab yuam tom qab lub tsho sov ntawm qhov kub, qhov adhesion thiab cov permeability rau daim ntawv qis qis dua tom qab qhov kub qis, thiab phau ntawv thaiv thiab lub hau khwb tsis khov khov . Kev sib koom tes. Yog li ntawd, nws yog ib qho tsim nyog ntxiv cov tackifier uas tuaj yeem txhim kho lub zog ntawm tsevneeg. Lub tackifier feem ntau yog ib qho polymerized rosin, terpene resin los yog cov zoo li.
3) Tus saib xyuas dej
Nws muaj nuj nqi yog txo cov ntsuas kub, ua kom lub cev muaj zog thiab kev ntub dej, thiab kho qhov ceev kom ncav cuag lub hom phiaj ntawm kev ruaj khov. Viscosity modifiers feem ntau siv cov microcrystalline paraffin los yog siv quav ciab quav.
4) Antioxidants
Nws muaj nuj nqi yog los tiv thaiv cov kub kub laus ntawm EVA kub melt nplaum thaum melting, thiab xyuas kom meej tias qhov kev ua tau zoo tsis hloov hauv cov kev kub kub. Antioxidants feem ntau yog xaiv los ntawm cov pab pawg uas muaj di-tert-butyl-p-methylphenols.
2, kub yaj nplaum ua haujlwm
1) Kev faib tawm los ntawm kev sib koom tes ceev
Yuav kom ntseeg tau tias phau ntawv ceev ceev, ntau hom kev kub ntxhua nplaum yuav tsum tau xaiv raws li cov tshuab sib txawv. Cov tawv kub uas ua rau cov tawv nqaij tau muab faib ua peb hom raws li kev ceev ntawm kev ruaj khov: qis ceev nplaum kub yaj (3,600 luam ntawv / teev), nruab nrab ceev ceev nplaum kub yaj (li 8,000 luam ntawv / teev) thiab high-speed nplaum kub yaj nplaum (10,000 copies / ib teev).
Lub sij hawm qhib thiab kev tua lub sij hawm ntawm kub yaj cov nplaum yog ze rau kev ceev ntawm kev ruaj ntseg. Lub sijhawm qhib yog hais txog lub sij hawm thaum lub tsho sov yaj siv rau ib qho kev sib txuas lus thiab sib koom ua ke nrog lwm tus. Lub sij hawm qhib txhais tau hais tias ob leeg yuav tsum tau ua kom tiav raws li lub sij hawm tau teem tseg kom pom tseeb tias qhov kev tso dag lub zog. Lub sijhawm qhib lub cav luv luv yog 15 mus rau 20 vib nas this, qhov nruab nrab ceev ceev yog 5 mus rau 10 vib nas this, thiab lub cav kub ceev yog 2 mus rau 7 feeb. Lub sij hawm tua ntawm kub kub nplaum txhais tau hais tias tom qab lub hau thiab phau ntawv thaiv yog raug ua ke nyob rau hauv lub sij hawm ua ntej, nws yog qhov yuav tsum tau txias tom qab ib lub sij hawm ntawm lub sij hawm tig cov pressurization. Lub sij hawm no yog hu ua lub sij hawm kho. Yog hais tias qhov kub qhuav nplaum tsis tau raug ntau, qhov khoom yog ploj los yog hlais, tom qab ntawm phau ntawv yuav muab deformed, thiab kub yaj nplaum yuav lo rau ntawm lub ntsej muag thaum txiav, uas yuav cuam tshuam qhov zoo ntawm cov khoom. Nws yuav tsum raug siv raws li qhov ntev ntawm txoj siv khoom thauj, qhov kev xaav ceev, thiab kev hloov raws caij nyoog. Cov kub yaj ua haujlwm nplaum yog feem ntau 3 mus rau 5 feeb.
2) Tsi yog ntawv
Yuav muab faib ua cov ntaub ntawv thiab cov ntawv xov xwm kub tawv nplaum. Rau ntau hom ntawv, qhov sib xyaw kub nplaum nplaum yuav tsum tau siv vim qhov dej tiav, permeability thiab thermal conductivity ntawm daim ntawv sib txawv.
3) Kev faib tawm los ntawm kev siv kua nplaum
Muab faib ua kua nplaum thiab qab kua nplaum. Cov kub nplaum nplaum nplaum siv rau sab nplaum nplaum muaj qhov zoo txaus, tsis muaj viscosity, ntev qhib lub sij hawm, ntev ntev lub sij hawm thiab tsev siab zog. Cov ntaub ntawv lo sab nraud yuav tsum yog nyias thiab tsis tau, thiab daim ntawv cog lus ruaj khov, kom thiaj li ua tau kom zoo thiab txiav txim siab ntawm phau ntawv. Ob qhov kev ua no tsis tuaj yeem siv tsis raug.
4) Classified los ntawm xim kua nplaum
Ntxiv rau, yog tias nws yog ib yam khoom ntawm tib qib, cov pos hniav zas daj zoo dua cov kua nplaum dawb.
Vim nws cov mis thiab txheej txheem, tsuas yog titanium dioxide ntxiv rau cov kua nplaum dawb. Vim cov neeg pluag meltability ntawm titanium dioxide, qhov nyuaj thiab viscosity ntawm cov roj hmab dawb yog txo, thiab nws yog ib qho yooj yim rau precipitate, kom lub cua sov ntaus xws li lub hwj chim preheating yog tsis yooj yim rau huv, thiab ib zaug tso rau hauv lub cua sov feem, cov cua kub nyhiab yog txo qis.
3, kev siv kub qhuav nplaum
1) Cov cua kub
Preheat ua ntej siv. Feem ntau preheating rau 1 mus rau 2 teev, tom qab ncav cov cua kub thiab muaj fluidity, nws muab tso rau hauv lub hnab yas ntawm 160 ° C ~ 180 ° C kom siv tau txhua zaus. Qhov kub ntawm kev siv yuav tsum nruj me ntsis tswj. Thaum lub ntsuas kub siab dhau heev lawm, qhov ua rau lub zog yuav txo, qhov fluidity thiab permeability yuav nce, thiab viscosity thiab lub zog yuav txo, uas yuav cuam tshuam qhov daim ntawv cog lus ntawm phau ntawv. Thaum lub kua kub ntawm lub kua nplaum tsis tshua muaj, qhov siab tuaj yeem ua rau lub cev tsis muaj zog thiab cov kab mob paug, lub kua nplaum poob thiab nkig, thiab cov nyhuv ua rau lub cev tsis zoo. Yuav kom tiv thaiv tau degumming thiab loosening ntawm daim ntawv, qhov kub ntawm qhov txheej yuav tsum tau tswj hauv qhov ntau ntawm 170 ° C mus txog 180 ° C. Txhawm rau kom muaj qhov zoo ntawm cov sizing, cov roj hmab yuav tsum muab tu ncua kom tu ncua cov laus kev ntxhov siab. Thaum lub caij txias thiab txias, tsis txhob quab dhau ntawm phau ntawv kom tsis txhob khov thiab txhav tawg. Nws yuav tsum thawed ntawm chav sov kub thaum siv.
2) Stability ntawm kub qhuav nplaum. Nws yog hais txog cov degree ntawm kev ruaj ntseg uas tau tshwm sim dua tom qab xa los yog cua kub ntev ntev. Yog hais tias lub thermal stability tsis zoo, cov xim ntawm cov kua nplaum yuav ua ib tsos tsaus tsawv, qhov yuav ua rau lub siab yuav nce, qhov permeability yuav txo, thiab cov nyiaj yuav ruaj khov.
3) Qhov zoo tshaj ntawm cov tawv kub nplaum nplaum yog yooj yim txheeb. Kub yaj cov nplaum muaj ntau qhov ntsuas, thiab yuav tsum tau muaj cov twj paj nruag tshwj xeeb thiab tsim nyog qhov chaw kuaj. Thaum tsis muaj cov khoom siv, ua ntej ntawm tag nrho cov, cov tsos ntawm hom gel yog zoo ib yam, nrog los sis tsis muaj npuas. Tom ntej no, lub kua nplaum tau yaj ua ib daim kab xev nplaum uas muaj li 1 cm thiab ib lub thickness ntawm 0.2 cm. Tom qab muab cua txias, cov ntaub nplaum yog ncav tes los ntawm seb nws puas ncav cuag tus txheej txheem, seb lub zog puas txaus, thiab seb qhov puas ntawm qhov ncauj puas muaj xim. Yog tias muaj cov khoom powdery, nws qhia tau hais tias cov ntaub so ntswg ntau dhau los sis tsis sib xyaw, los yog cov neeg ua ntaub nplov loj loj, uas ua rau muaj kev sib tsoo loj. Tom ntej no, cov roj hmab tau muab cia rau hauv ib cheeb tsam ntawm 0 ° C, thiab tom qab 24 teev, lawv tau coj tawm thiab raug ntaus nrog ib yam khoom nyuab. Yog hais tias brittle cracking tshwm sim, qhov qis-kub kub tsis raug. Tom qab muab kua nplaum tso rau ntawm qhov kub ntawm 40 ° C rau ib lub sij hawm ntev, yog cov kua nplaum nplaum, nplaum los yog nplaum, nws qhia tau hais tias qhov nplaum qhov muag ntawm cov kua nplaum yog tsawg.
4, kev khiav dej num yuav tsum muaj
1) Lub thickness ntawm lub nplaum feem ntau yog nruab nrab ntawm 0.8 thiab 1.2 mm, thiab cov nplaum kab yuav tsum yog cov teeb. Ib txheej thim rov qab muaj feem xyuam rau lub zog ntawm daim ntawv cog lus, thiab hnyav dhau tus nqi nce. Qhov ntev ntawm lub kua nplaum yuav tsum me ntsis luv dua li qhov npog 1 ~ 2 hli. Yog tias nws ntev dhau lawm, nws yuav ua rau lub kua nplaum lo rau ntawm lub tshuab. Nws yuav ua rau cov roj hmab qaum sab nraub qaum ntawm phau ntawv los yog ua kom lub hau npoo tsis zoo thiab puas ntsoog. Nws yog ib qho yooj yim uas yuav ua rau cov kev txhaum ntawm txoj kev tivthaiv kom dhau los luv luv. Lub ntuj thiab taw yog npliag, uas cuam tshuam rau cov phau ntawv zoo.
2) Qhov dav ntawm sab qaum rub yog feem ntau 3 mus rau 7 hli, thiab thinner qhov hnyav zog zoo dua. Yuav kom paub meej tias nws cov kua fluidity, qhov kub ntawm cov kua nplaum yuav tsum raug tswj txog li 180 ° C. Tsis txhob siv cov kua nplaum rau sab nraum qab, tsis li ntawd nws yuav nqa cov kab hauv kab.
3) Daim ntawv milling ntawm phau ntawv no yuav tsum txiav txim siab raws li lub thickness ntawm kos npe. Them nyiaj tshwj xeeb rau cov txheej txheem folding ntawm nplooj ntawv nplooj los tiv thaiv cov phenomenon ntawm luv. Ua kom muaj nplooj ntim ntawm txhua qhov kos npe rau hauv ib phab sab nraud, tus milling yuav tsum tau yaug dej, thiab sab nraum qab ntawm phau ntawv tsis tuaj yeem ua milled mus rau hauv ib qho bevel, txwv tsis pub lub thickness ntawm txheej txheej tsis yog yam tsis.
4) Tom qab ntawm phau ntawv yuav tsum tau grooved thiab qhov tob thiab spacing ntawm zawj yog tib yam. Qhov zoo ntawm qhov milling zawj yog ncaj qha ntsig txog lub zog ntawm phau ntawv, tsis txhob tshwm sim ntawm cov nplooj ntawv xoob thiab muab cov nplooj ntawv poob. Lub milling zom zaws yuav tsum ua kom du thiab huv, daim ntaub plaub yog huv, lub nrawm qis yog 5 ~ 10 hli, thiab qhov zuag qhov tob yog 0.5 ~ 1.2 hli, uas yog siv rau cov kua nplaum thiab kev txhim kho muaj zog.