Uhlobo olutsha lwe-adhesive ye-polyurethane yalungiswa ngokusebenzisa i-molecule encinci ye-polyacids kunye ne-molecule encinci ye-polyols njengezinto ezisisiseko zokulungiselela ii-prepolymers. Ngexesha lenkqubo yokwandiswa kwekhonkco, iipolymers ze-hyperbranched kunye ne-HDI trimers zaziswa kwisakhiwo se-polyurethane. Iziphumo zovavanyo zibonisa ukuba i-adhesive elungiselelwe kolu cwaningo ine-viscosity efanelekileyo, i-disc ye-adhesive ende, inokunyangwa ngokukhawuleza kwiqondo lokushisa, kwaye ineempawu ezintle zokubambisana, amandla okutywinwa kobushushu kunye nokuzinza kwe-thermal.

Ukupakishwa okuguquguqukayo okuhlanganisiweyo kunoncedo lwenkangeleko egqibeleleyo, uluhlu olubanzi lwezicelo, uthutho olufanelekileyo, kunye nexabiso eliphantsi lokupakisha. Ukususela ekuqalisweni kwayo, isetyenziswe ngokubanzi kukutya, amayeza, iikhemikhali zemihla ngemihla, i-electronics kunye namanye amashishini, kwaye ithandwa kakhulu ngabathengi. Ukusebenza kwe-composite flexible packaging ayihambelani kuphela kwizinto zefilimu, kodwa kuxhomekeke ekusebenzeni kwe-adhesive composite. Ukuncamatheliswa kwePolyurethane kuneengenelo ezininzi ezinje ngokuqina kokuhlangana okuphezulu, ukuhlengahlengiswa okuqinileyo, kunye nococeko kunye nokhuseleko. Okwangoku yeyona nto ixhasayo yokuxhasa ukupakishwa okuhlanganisiweyo kunye nokugxila kuphando ngabavelisi abakhulu abancamathelayo.

Ukuguga okuphezulu kobushushu yinkqubo eyimfuneko ekulungiseleleni ukupakishwa okuguquguqukayo. Ngeenjongo zomgaqo-nkqubo kazwelonke we "carbon peak" kunye "ne-carbon neutrality", ukukhuselwa kokusingqongileyo okuluhlaza, ukunciphisa ukukhutshwa kwekhabhoni ephantsi, kunye nokusebenza okuphezulu kunye nokugcinwa kwamandla kuye kwaba yinjongo yophuhliso kuzo zonke iinkalo zobomi. Ukushisa okuguga kunye nexesha lokuguga kunefuthe elihle kumandla e-peel yefilimu edibeneyo. Ngokwethiyori, okukhona ubushushu bokwaluphala buphezulu kwaye ixesha lokuguga lide, kokukhona izinga lokugqiba ukusabela liphezulu kwaye kokukhona isiphumo sokunyanga singcono. Kwinkqubo yesicelo sokuvelisa ngokwenene, ukuba ukushisa kokuguga kunokuncitshiswa kwaye ixesha lokuguga lingancitshiswa, kungcono ukuba ungafuni ukuguga, kunye ne-slitting kunye nebhegi inokuqhutywa emva kokuba umatshini ucinyiwe. Oku akukwazi ukufikelela kuphela kwiinjongo zokukhuselwa kokusingqongileyo okuluhlaza kunye nokunciphisa ukukhutshwa kwekhabhoni ephantsi, kodwa nokugcina iindleko zokuvelisa kunye nokuphucula ukusebenza kakuhle kwemveliso.

Olu pho nonongo luhloselwe ukudibanisa uhlobo olutsha lwe-adhesive ye-polyurethane ene-viscosity efanelekileyo kunye ne-adhesive disc ubomi ngexesha lokuvelisa kunye nokusetyenziswa, inokunyanga ngokukhawuleza phantsi kweemeko zokushisa eziphantsi, ngokukhethekileyo ngaphandle kokushisa okuphezulu, kwaye ayichaphazeli ukusebenza kwezibonakaliso ezahlukeneyo zokupakishwa okuguquguqukayo.

1.1 Izinto zovavanyo I-Adipic acid, i-sebacic acid, i-ethylene glycol, i-neopenyl glycol, i-diethylene glycol, i-TDI, i-HDI trimer, i-polymer eyenziwe nge-labhoratri eyenziwe nge-hyperbranched, i-ethyl acetate, ifilimu ye-polyethylene (PE), ifilimu ye-polyester (PET), i-aluminium foil (AL).
1.2 Izixhobo zovavanyo Idesktop yombane engaguqukiyo yobushushu be-oveni yokomisa umoya: DHG-9203A, Shanghai Yiheng Scientific Instrument Co., Ltd.; I-viscometer ejikelezayo: NDJ-79, Shanghai Renhe Keyi Co., Ltd.; Umatshini wokuvavanya i-Universal tensile: XLW, Labthink; I-Thermogravimetric analyzer: TG209, NETZSCH, eJamani; Umvavanyi wetywina lobushushu: SKZ1017A, Jinan Qingqiang Electromechanical Co., Ltd.
1.3 Indlela yokudibanisa
I-1) Ukulungiswa kwe-prepolymer: Yomisa i-flask eneentamo ezine kakuhle kwaye udlule i-N2 kuyo, uze udibanise i-molecule encinci ye-polyol kunye ne-polyacid kwi-flask ezine-neck kwaye uqale ukuvuselela. Xa iqondo lobushushu lifikelela kwiqondo lobushushu elibekiweyo kunye nemveliso yamanzi isondele kwimveliso yamanzi ithiyori, thatha umlinganiselo othile wesampulu yovavanyo lwexabiso leasidi. Xa ixabiso le-asidi ≤20 mg / g, qalisa isinyathelo esilandelayo sokuphendula; yongeza 100 × 10-6 imitha catalyst, ukudibanisa vacuum umsila umbhobho kwaye uqale impompo vacuum, lawula izinga lemveliso yotywala ngeqondo vacuum, xa imveliso yotywala yokwenene isondele imveliso utywala ithiyori, thatha isampuli ethile uvavanyo lwexabiso hydroxyl, kwaye aphelise ukusabela xa ixabiso hydroxyl ihlangabezana neemfuno zoyilo. I-polyurethane prepolymer efunyenweyo ipakishwe ukuze isetyenziswe ngokulinda.
I-2) Ukulungiswa kwe-adhesive-based polyurethane adhesive: Yongeza i-polyurethane prepolymer kunye ne-ethyl ester kwi-flask enentamo ezine, ubushushu kwaye ugxobhoze ukuze usasazeke ngokulinganayo, uze udibanise i-TDI elinganisiweyo kwi-flask enentamo emine, gcina ukufudumala kwe-1.0 h, uze udibanise i-polymer eyenziwe ekhaya kwi-polymer kwi-laboratory ye-labhoratri ye-labhoratri ye-labhoratri ye-labhoratri ye-labhoratri ye-labhoratri ye-labhoratri ye-labhoratri ye-labhoratri ye-labhoratri, ngokucotha kwi-HDI kwaye udibanise kwi-HDI. i-flask enentamo emine, hlala ushushu kwi-2.0 h, uthathe iisampuli zokuvavanya umxholo we-NCO, upholise kwaye ukhulule izinto zokupakisha emva kokuba umxholo we-NCO ufanelekile.
I-3) I-lamination eyomileyo: Hlanganisa i-ethyl acetate, i-agent ephambili kunye ne-agent yokunyanga kwinqanaba elithile kwaye ugxobhoze ngokulinganayo, uze usebenzise kwaye ulungiselele iisampulu kumatshini wokuhlamba owomileyo.

1.4 Uvavanyo lweempawu
1) I-Viscosity: Sebenzisa i-viscometer ejikelezayo kwaye ubhekisele kwi-GB / T 2794-1995 Indlela yokuvavanya i-viscosity ye-adhesives;
I-2) Amandla e-T-peel: ihlolwe kusetyenziswa umatshini wokuvavanya we-universal tensile, ebhekisela kwi-GB / T 8808-1998 indlela yokuvavanya amandla e-peel;
I-3) Amandla okutywinwa kokushisa: sebenzisa kuqala i-heat tester tester ukwenza isitywina sobushushu, emva koko usebenzise umatshini wokuvavanya ubushushu behlabathi lonke ukuvavanya, bhekisa kwi-GB / T 22638.7-2016 indlela yokuvavanya amandla obushushu;
I-4) Uhlalutyo lwe-Thermogravimetric (TGA): Uvavanyo lwenziwe kusetyenziswa i-thermogravimetric analyzer enezinga lokufudumeza i-10 ℃ / min kunye noluhlu lweqondo lokushisa lwe-50 ukuya kwi-600 ℃.

2.1 Utshintsho kwi-viscosity kunye nexesha lokuphendula lokuxuba I-viscosity ye-adhesive kunye nobomi be-rubber disc zizibonakaliso ezibalulekileyo kwinkqubo yokuvelisa imveliso. Ukuba i-viscosity ye-adhesive iphezulu kakhulu, inani leglue elisetyenzisiweyo liya kuba likhulu kakhulu, elichaphazela ukubonakala kunye neendleko zokugubungela ifilimu edibeneyo; ukuba i-viscosity iphantsi kakhulu, inani leglue elisetyenzisiweyo liya kuba liphantsi kakhulu, kwaye inkino ayinakungeniswa ngokufanelekileyo, eya kuchaphazela ukubonakala kunye nokusebenza kokubambisana kwefilimu edibeneyo. Ukuba ubomi bediski yerabha bufutshane kakhulu, i-viscosity yeglue egcinwe kwi-tank yeglue iya kwanda ngokukhawuleza, kwaye iglue ayikwazi ukusetyenziswa kakuhle, kwaye i-rubber roller ayilula ukuyicoca; ukuba ubomi bediski yerabha bude kakhulu, buya kuchaphazela ukubonakala kokubambelela kokuqala kunye nokusebenza kwebhondi yezinto ezidibeneyo, kwaye kuchaphazela izinga lokunyanga, ngaloo ndlela kuchaphazela ukusebenza kakuhle kwemveliso.

Ukulawulwa kwe-viscosity efanelekileyo kunye nobomi be-disc adhesive parameters ebalulekileyo yokusetyenziswa kakuhle kwe-adhesives. Ngokwamava okuvelisa, i-agent ephambili, i-ethyl acetate kunye ne-ejenti yokuphilisa ihlengahlengiswa kwixabiso elifanelekileyo le-R kunye ne-viscosity, kwaye i-adhesive ihlanganiswe kwi-tank yokubambelela kunye ne-rubber roller ngaphandle kokusebenzisa i-glue kwifilimu. Iisampulu ezincamathelayo zithathwa ngamaxesha ahlukeneyo ovavanyo lwe-viscosity. I-viscosity efanelekileyo, ubomi obufanelekileyo be-disc yokubambelela, kunye nokunyanga ngokukhawuleza phantsi kweemeko eziphantsi zokushisa zinjongo ezibalulekileyo ezilandelwa yi-solvent-based polyurethane adhesives ngexesha lokuvelisa kunye nokusetyenziswa.

2.2 Impembelelo yeqondo lokushisa eligugayo kumandla e- peel Inkqubo yokuguga yeyona nto ibalulekileyo, idla ixesha, inamandla kwaye ithatha indawo enkulu kwinkqubo yokupakishwa okuguquguqukayo. Ayichaphazeli nje kuphela izinga lemveliso yemveliso, kodwa kubaluleke ngakumbi, ichaphazela ukubonakala kunye nokusebenza kwebhondi ye-composite flexible packaging. Ukujongana neenjongo zikaRhulumente ze "carbon peak" kunye "ne-carbon neutrality" kunye nokhuphiswano oluqatha lwemarike, ukuguga okuphantsi kobushushu kunye nokunyanga ngokukhawuleza ziindlela ezisebenzayo zokuphumeza ukusetyenziswa kwamandla aphantsi, imveliso eluhlaza kunye nemveliso esebenzayo .

Ifilimu edibeneyo ye-PET / AL / PE yayikhulile kwiqondo lokushisa kunye ne-40, i-50, kunye ne-60 ℃. Kwiqondo lokushisa lokushisa, amandla e-peel yoluhlu lwangaphakathi lwe-AL / PE isakhiwo esihlanganisiweyo sahlala sizinzile emva kokuguga kwi-12 h, kwaye ukunyanga kwagqitywa ngokusisiseko; kwiqondo lokushisa lokushisa, amandla e-peel yoluhlu lwangaphandle lwe-PET / AL oluphezulu lwe-barrier-barrier luhlala luzinzile emva kokuguga kwi-12 h, ebonisa ukuba izinto zefilimu ezithintelayo ziya kuchaphazela ukunyangwa kwe-adhesive polyurethane; xa uthelekisa iimeko zobushushu obunyangayo obuyi 40, 50, kunye ne 60 ℃, akukho mahluko ucacileyo kwiqondo lokunyanga.

Xa kuthelekiswa nezinto zokuncamathelisa ezisekwe kwi-solvent-based polyurethane kwimarike yangoku, ixesha lokuguga elinobushushu obuphezulu liziiyure ezingama-48 nangaphezulu. I-adhesive ye-polyurethane kule sifundo inokugqiba ngokusisiseko ukunyangwa kwesakhiwo somqobo ophezulu kwiiyure ze-12 kwiqondo lokushisa. I-adhesive ephuhlisiwe inomsebenzi wokunyanga ngokukhawuleza. Ukuqaliswa kweepolymers ze-hyperbranched zasekhaya kunye ne-isocyanates esebenzayo kwi-adhesive, kungakhathaliseki ukuba i-adhesive yangaphandle ye-maleko ye-composite okanye i-internal layer composite structure, amandla e-peel phantsi kweemeko zobushushu begumbi awahlukanga kakhulu kumandla we-peel phantsi kweemeko zokuguga okuphezulu, ebonisa ukuba i-adhesive ephuhlisiwe ayinayo nje umsebenzi wokunyanga ngokukhawuleza, kodwa inokonyango olukhawulezayo.

2.3 Impembelelo yeqondo lokushisa eliguga kumandla etywina lobushushu Iimpawu zokutywinwa kobushushu bezixhobo kunye nefuthe lokwenene lokutywinwa kobushushu zichatshazelwa zizinto ezininzi, njengesixhobo sokutywina ubushushu, iiparamitha zokusebenza komzimba kunye neekhemikhali zezinto ngokwazo, ixesha lokutywinwa kobushushu, uxinzelelo lwetywina lobushushu kunye nobushushu betywina lobushushu, njl.n

Xa ifilimu edibeneyo iphuma nje kumatshini, amandla okutywinwa kobushushu aphantsi, kuphela i-17 N / (15 mm). Ngeli xesha, i-adhesive isanda kuqalisa ukuqina kwaye ayikwazi ukunika amandla okwaneleyo okudibanisa. Amandla avavanyiweyo ngeli xesha kukutywinwa kobushushu befilimu ye-PE; njengoko ixesha lokuguga likhula, amandla etywina lobushushu ayanda kakhulu. Amandla okutywinwa kobushushu emva kokuguga kwiiyure ze-12 ngokusisiseko kufana nokuba emva kwe-24 kunye neeyure ze-48, ebonisa ukuba ukunyanga kugqitywe ngokusisiseko kwiiyure ze-12, ukubonelela ngokudibanisa okwaneleyo kwiifilimu ezahlukeneyo, okubangelwa ukunyuka kwamandla okutywinwa kobushushu. Ukusuka kwijiko lokutshintsha lamandla etywina lobushushu kumaqondo obushushu ahlukeneyo, kunokubonwa ukuba phantsi kweemeko ezifanayo zokuguga, akukho mahluko ungako kumandla etywina lobushushu phakathi kokuguga kwegumbi kunye neemeko ezingama-40, 50, kunye ne-60 ℃. Ukuguga kwiqondo lokushisa elingaphakathi kunokufezekisa ngokupheleleyo umphumo wokuguga okuphezulu. Ulwakhiwo lokupakisha oluguquguqukayo oludityaniswe ngolu ncamatheliso luphuhlisiwe lunamandla okutywinwa kobushushu obulungileyo phantsi kweemeko zobushushu obuphezulu bokuguga.

2.4 Ukuzinza kwe-Thermal yefilimu ephilisiwe Ngexesha lokusetyenziswa kwepakethe eguquguqukayo, ukutywinwa kobushushu kunye nokwenza ibhegi kuyadingeka. Ukongeza kwi-thermal stability yezinto zefilimu ngokwayo, ukuzinza kwe-thermal yefilimu ephilisiwe ye-polyurethane inquma ukusebenza kunye nokubonakala kwemveliso yokupakisha eguquguqukayo egqityiweyo. Olu phononongo lusebenzisa uhlalutyo lwe-thermal gravimetric (TGA) indlela yokuhlalutya ukuzinza kwe-thermal yefilimu ephilisiwe ye-polyurethane.

Ifilimu ye-polyurethane ephilisiweyo ineencopho ezimbini ezicacileyo zokulahlekelwa kwesisindo kwiqondo lokushisa lokuvavanya, elihambelana nokuchithwa kwe-thermal yecandelo elinzima kunye necandelo elithambileyo. Iqondo lokushisa lokubola kwe-thermal yecandelo elithambileyo liphezulu kakhulu, kwaye ukwehla kobunzima bokushisa kuqala ukwenzeka kwi-264 ° C. Kulo bushushu, inokufikelela kwiimfuno zobushushu benkqubo yangoku yokupakisha ethambileyo yokutywinwa kobushushu, kwaye inokuhlangabezana neemfuno zobushushu bokuveliswa kokupakishwa ngokuzenzekelayo okanye ukuzaliswa, ukuthuthwa kwesikhongozeli eside, kunye nenkqubo yokusetyenziswa; iqondo lobushushu lokubola kwe-thermal yecandelo eliqinileyo liphezulu, lifikelela kuma-347°C. I-adhesive ephuhlisiwe yobushushu obuphezulu obunganyangekiyo inozinzo oluhle lobushushu. Umxube we-asphalt we-AC-13 kunye ne-steel slag yanda nge-2.1%.

3) Xa isiqulatho sentsimbi ye-slag sifikelela kwi-100%, oko kukuthi, xa ubungakanani be-particle enye ye-4.75 ukuya kwi-9.5 mm ithatha indawo ye-limestone, ixabiso eliseleyo lozinzo lomxube we-asphalt yi-85.6%, eyi-0.5% ephezulu kunomxube we-asphalt we-AC-13 ngaphandle kwe-slag yensimbi; umlinganiselo wokwahlula amandla yi-80.8%, eyi-0.5% ephezulu kunomxube we-asphalt we-AC-13 ngaphandle kwe-slag yensimbi. Ukongezwa kwesixa esifanelekileyo se-slag yensimbi kunokuphucula ngokufanelekileyo ukuzinza okushiyekileyo kunye nomlinganiselo wamandla oqhekezayo we-AC-13 yensimbi ye-asphalt umxube, kwaye unokuphucula ngokufanelekileyo ukuzinza kwamanzi omxube we-asphalt.

1)Phantsi kweemeko eziqhelekileyo zokusetyenziswa, i-viscosity yokuqala ye-adhesive-based polyurethane adhesive elungiselelwe ngokuzisa iipolymers ezenziwe ekhaya kunye ne-multifunctional polyisocyanates ijikeleze i-1500mPa·s, ene-viscosity enhle; ubomi bediski yokubambelela bufikelela kwi-60 min, enokuthi ihlangabezane ngokupheleleyo neemfuno zexesha lokusebenza kwiinkampani zokupakisha eziguquguqukayo kwinkqubo yokuvelisa.

I-2)Inokubonwa ukusuka kumandla e-peel kunye namandla okutywinwa kobushushu ukuba i-adhesive elungisiweyo inokunyanga ngokukhawuleza kwiqondo lokushisa. Akukho mahluko mkhulu kwisantya sokunyanga kwiqondo lobushushu begumbi nakwi-40, 50, kunye ne-60 ℃, kwaye akukho mahluko mkhulu kumandla okudibanisa. Le ngcina inokunyangwa ngokupheleleyo ngaphandle kobushushu obuphezulu kwaye inokunyanga ngokukhawuleza.

I-3) Uhlalutyo lwe-TGA lubonisa ukuba i-adhesive inozinzo oluhle lwe-thermal kwaye inokuhlangabezana neemfuno zokushisa ngexesha lokuvelisa, ukuthutha kunye nokusetyenziswa.