Rudzi rutsva rwekunamira kwepolyurethane rakagadzirwa nekushandisa diki molecule polyacids uye diki mamorekuru polyols seyakakosha zvigadzirwa kugadzira prepolymers. Munguva yekuwedzera ketani maitiro, hyperbranched polymers uye HDI trimers akaunzwa mune polyurethane chimiro. Mhedzisiro yebvunzo inoratidza kuti inonamira yakagadzirirwa muchidzidzo ichi ine viscosity yakakodzera, hupenyu hwakareba hwekunamira dhisiki, inogona kukurumidza kuporeswa pane tembiricha yekamuri, uye ine yakanaka yekubatanidza zvivakwa, kupisa kwekuvhara simba uye kugadzikana kwekupisa.

Composite flexible packaging ine zvakanakira kutaridzika kwakanaka, yakafara application range, zviri nyore zvekufambisa, uye mutengo wakaderera wekurongedza. Kubva pakuiswa kwayo, yakashandiswa zvakanyanya mukudya, mushonga, makemikari ezuva nezuva, zvemagetsi uye mamwe maindasitiri, uye inodiwa zvakanyanya nevatengi. Kuitwa kwecomposite flexible packaging haisi kungoenderana chete nefirimu zvinhu, asiwo zvinoenderana nekuita kweiyo composite adhesive. Polyurethane adhesive ine akawanda mabhenefiti senge yakakwira bonding simba, kurongeka kwakasimba, uye hutsanana uye kuchengeteka. Parizvino ndiyo inonyanya kutsigira inonamira yecomposite inochinjika kurongedza uye tarisiro yekutsvagisa nevagadziri vakuru vekunamira.

Kuchembera kwepamusoro-tembiricha inzira yakakosha mukugadzirira kwekurongedza kuchinjika. Nezvinangwa zvemitemo yenyika zve "carbon peak" uye "carbon neutrality", kuchengetedzwa kwegirinhi kwezvakatipoteredza, kuderedzwa kwekabhoni emission, uye kushanda kwakanyanya uye kuchengetedza simba zvave zvinangwa zvekusimudzira zvemarudzi ese ehupenyu. Tembiricha yekuchembera uye nguva yekuchembera ine mhedzisiro yakanaka pane peel simba reiyo composite firimu. Tichifunga, kukwirisa tembiricha yekuchembera uye nekurebesa nguva yekuchembera, kunowedzera kupedzwa kwekuita uye zvirinani maitiro ekurapa. Mune chaiyo yekugadzira dhizaini yekugadzira, kana tembiricha yekuchembera inogona kudzikiswa uye nguva yekuchembera inogona kupfupikiswa, zviri nani kusada kuchembera, uye kutsemura uye kubhegi kunogona kuitwa mushure mekunge muchina wadzimwa. Izvi hazvigone chete kuzadzisa zvinangwa zvegirinhi kuchengetedzwa kwezvakatipoteredza uye yakaderera-kabhoni emission kuderedzwa, asi zvakare chengetedza mutengo wekugadzira uye kuvandudza kugadzirwa kwakanaka.

Ichi chidzidzo chakagadzirirwa kugadzira rudzi rutsva rwe polyurethane adhesive ine viscosity yakakodzera uye inonamira disc hupenyu panguva yekugadzirwa uye kushandiswa, inogona kurapa nekukurumidza pasi pemamiriro ekunze ekupisa, zviri nani pasina tembiricha yakakwira, uye haikanganisi kuita kwezviratidzo zvakasiyana-siyana zvecomposite flexible packaging.

1.1 Experimental materials Adipic acid, sebacic acid, ethylene glycol, neopentyl glycol, diethylene glycol, TDI, HDI trimer, laboratory-made hyperbranched polymer, ethyl acetate, polyethylene film (PE), polyester film (PET), aluminium foil (AL).
1.2 Zvishandiso zvekuedza Desktop magetsi anogara achipisa tembiricha yemhepo yekuomesa ovheni: DHG-9203A, Shanghai Yiheng Scientific Instrument Co., Ltd.; Rotational viscometer: NDJ-79, Shanghai Renhe Keyi Co., Ltd.; Universal tensile test machine: XLW, Labthink; Thermogravimetric analyzer: TG209, NETZSCH, Germany; Heat seal tester: SKZ1017A, Jinan Qingqiang Electromechanical Co., Ltd.
1.3 Synthesis nzira
1) Gadziriro yeprepolymer: Nyatsoomesa furasiki ine mitsipa ina uye upfuure N2 mairi, wobva wawedzera yakayerwa molecule polyol uye polyacid muflask ine mitsipa ina uye tanga kubvongodza. Kana tembiricha ichisvika patembiricha yakatarwa uye kubuda kwemvura kwave pedyo nekubuda kwemvura, tora imwe chiyero chemuenzaniso weasidhi kukosha bvunzo. Kana iyo asidi yakakosha ≤20 mg / g, tanga danho rinotevera rekuita; wedzera 100 × 10-6 metered catalyst, batanidza iyo vacuum muswe pombi uye tanga vacuum pombi, kudzora doro rekubuda mwero nedhigirii rekutsvaira, kana iyo chaiyo inobuda doro iri pedyo neiyo theoretical doro kubuda, tora imwe sampu ye hydroxyl kukosha bvunzo, uye kumisa maitiro apo kukosha kwehydroxyl kunosangana nezvinodiwa zvekugadzira. Iyo yakawanikwa polyurethane prepolymer yakarongedzerwa kushandiswa kwekumira.
2) Kugadzirira kwesolvent-based polyurethane adhesive: Wedzera yakayerwa polyurethane prepolymer uye ethyl ester muflask ine mitsipa ina, kupisa uye kusimudzira kupararira zvakaenzana, wobva wawedzera yakayerwa TDI muflask ine mitsipa ina, gara uchidziya kwe1. furasiki ine mitsipa ina, ramba uchidziya kwe2.0 h, tora sampuli kuti uedze iyo NCO zvirimo, tonhorera pasi uye usunungure zvinhu zvekurongedza mushure mekunge NCO yemukati yakwanisa.
3) Dry lamination: Sanganisa ethyl acetate, mumiririri mukuru uye mumiririri wekurapa mune imwe chikamu uye simbisa zvakaenzana, wobva waisa uye gadzirira sampuli pamushini wakaoma welaminating.

1.4 Test Characterization
1) Viscosity: Shandisa viscometer inotenderera uye tarisa kune GB/T 2794-1995 Test method ye viscosity yeadhesives;
2) T-peel simba: yakaedzwa uchishandisa universal tensile test machine, zvichireva GB/T 8808-1998 peel simba test method;
3) Kupisa kwechisimbiso simba: kutanga shandisa kupisa chisimbiso tester kuita chisimbiso chekupisa, wozoshandisa universal tensile test machine kuti uedze, tarisa GB / T 22638.7-2016 kupisa chisimbiso simba rekuedza nzira;
4) Kuongorora kweThermogravimetric (TGA): Muedzo wakaitwa uchishandisa thermogravimetric analyzer ine mwero wekupisa we10 ℃ / min uye tembiricha yekuyedza ye50 kusvika 600 ℃.

2.1 Shanduko muviscosity nekusanganisa kuita nguva Iyo viscosity yekunamatira uye hupenyu hwerubha disc zviratidzo zvakakosha mukugadzirwa kwechigadzirwa. Kana iyo viscosity yekunamatira yakanyanyisa, huwandu hweglue hunoshandiswa huchave hwakanyanya, hunokanganisa kutaridzika uye mari yekuputira yefirimu inosanganiswa; kana iyo viscosity yakanyanya kuderera, huwandu hweglue hunoshandiswa huchave hwakaderera, uye iyo inki haigone kupindira zvinobudirira, izvo zvichakanganisawo kutaridzika uye kusungirirwa kwekuita kweiyo composite firimu. Kana hupenyu hwe disc rubber hupfupi, viscosity yeglue yakachengetwa mutangi yeglue ichawedzera nokukurumidza, uye glue haigoni kushandiswa zvakanaka, uye rubber roller haisi nyore kuchenesa; kana hupenyu hwerabha disc hwakanyanya kureba, huchakanganisa kutaridzika kwekutanga kwekunamatira uye kubatanidza kuita kweiyo composite zvinhu, uye kunyange kukanganisa chiyero chekurapa, zvichizokanganisa kugadzirwa kwechigadzirwa.

Yakakodzera viscosity control uye hupenyu hweadhesive disc ndiyo yakakosha paramita yekushandiswa kwakanaka kweadhesives. Zvinoenderana neruzivo rwekugadzira, iyo main agent, ethyl acetate uye kurapa mumiriri inogadziridzwa kune yakakodzera R kukosha uye viscosity, uye inonamira inokungurutswa mune inonamira tangi ine rubber roller pasina kushandisa glue kufirimu. Iwo anonamira samples anotorwa panguva dzakasiyana dzekuongororwa viscosity. Viscosity yakakodzera, hupenyu hwakakodzera hweadhesive disc, uye nekukurumidza kupora pasi pemamiriro ekushisa kwakadzika zvibodzwa zvakakosha zvinotevedzwa nesolvent-based polyurethane adhesives panguva yekugadzira uye kushandiswa.

2.2 Mhedzisiro yekuchembera tembiricha pasimba rema peel Kuchembera kwakakosha, kunotora nguva, kunotora simba uye nzvimbo-yakawanda maitiro ekurongedza anochinjika. Izvo hazvingokanganisa chiyero chekugadzirwa kwechigadzirwa, asi chinonyanya kukosha, chinokanganisa chitarisiko uye chisungo chekuita kwecomposite flexible packaging. Takatarisana nezvinangwa zvehurumende zve "carbon peak" uye "carbon neutrality" uye kukwikwidza kunotyisa kwemusika, kuchembera kwakadzika uye kurapa nekukurumidza inzira dzinoshanda dzekuwana kuderera kwesimba rekushandisa, kugadzirwa kwegirini uye kugadzirwa kwakanaka .

Iyo PET/AL/PE composite firimu yaive yachembera pakamuri tembiricha uye pa40, 50, uye 60 ℃. Pakupisa kwekamuri, kusimba kwepeel yemukati wemukati AL / PE composite chimiro chakaramba chakagadzikana mushure mekuchembera kwe12 h, uye kurapa kwakapedzwa; pakupisa kwekamuri, simba repeel rekunze kwePET / AL high-barrier composite structure yakaramba yakagadzikana mushure mekukwegura kwe 12 h, zvichiratidza kuti iyo yepamusoro-barrier firimu zvinhu zvichakanganisa kupora kwe polyurethane adhesive; tichienzanisa tembiricha yekurapa ye40, 50, uye 60 ℃, pakanga pasina mutsauko uri pachena muchiyero chekurapa.

Kana ichienzaniswa neyekunyungudika-based polyurethane adhesives pamusika wazvino, iyo yakanyanya tembiricha yekuchembera inowanzoita maawa makumi mana nemasere kana kutopfuura. Iyo polyurethane adhesive muchidzidzo ichi inogona kupedzisa kupora kweiyo yepamusoro-barrier chimiro mumaawa gumi nemaviri pakudziya kwekamuri. Iyo yakagadziriswa yakanamatira ine basa rekukurumidza kurapa. Iko kuunzwa kwe Homemade hyperbranched polymers uye multifunctional isocyanates mune inonamatira, zvisinei nekunze dhizaini inoumbwa chimiro kana yemukati dhizaini inoumbwa chimiro, iyo peel simba pasi pekamuri tembiricha mamiriro haana kunyanya kusiyana neiyo peel simba pasi pekuchembera kwepamusoro-tembiricha mamiriro ekuchembera, zvichiratidza kuti inonamira yakagadziridzwa haina basa rekukurumidza kurapa kwekukurumidza, asi zvakare ine basa rekukurumidza kupora, asi zvakare rine basa rekukurumidza kurapa.

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Kana iyo composite firimu ichangobva pamushini, kupisa kwekusimbisa simba kwakadzikira, chete 17 N/(15 mm). Panguva ino, iyo yakanamatira ichangotanga kusimba uye haigone kupa yakakwana yekubatanidza simba. Simba rakaedzwa panguva ino ndiro simba rekusimbisa kupisa kwefirimu yePE; sezvo nguva yekukwegura inowedzera, simba rekusimbisa kupisa rinowedzera zvakanyanya. Kupisa kwechisimbiso simba mushure mekukwegura kwemaawa gumi nemaviri kwakangofanana neaya mushure memaawa makumi maviri nemana ne48, zvichiratidza kuti kupora kunopedzwa mumaawa gumi nemaviri, kupa chisungo chakakwana chemafirimu akasiyana, zvichiita kuti kuwedzera kwesimba rekuvhara kupisa. Kubva pakuchinja kwechivharo chekupisa kwesimba pakupisa kwakasiyana, zvinogona kuonekwa kuti pasi pemamiriro akafanana enguva yekuchembera, hapana mutsauko mukuru mukusimba kwekupisa kwekushisa pakati pekuchembera kwekamuri uye 40, 50, uye 60 ℃ mamiriro. Kuchembera pakushambidzika kwekamuri kunogona kuita zvizere mhedzisiro yekuchembera kwakanyanya. Iyo inochinjika yekurongedza dhizaini inosanganiswa neiyi yakagadziridzwa adhesive ine yakanaka yekupisa chisimbiso simba pasi pekushisa kwakanyanya kwekuchembera.

2.4 Thermal kugadzikana kwefirimu yakarapwa Panguva yekushandiswa kwekugadzirisa kusungirirwa, kuvhara kupisa uye kugadzira bhegi kunodiwa. Pamusoro pekugadzikana kwekupisa kweiyo firimu zvinhu pachayo, kugadzikana kwekupisa kweyakaporeswa polyurethane firimu kunotarisa kuita uye kutaridzika kweyakapedzwa inochinjika yekurongedza chigadzirwa. Ichi chidzidzo chinoshandisa thermal gravimetric analysis (TGA) nzira yekuongorora kugadzikana kwekupisa kwefirimu yakarapwa yepolyurethane.

Iyo yakarapwa polyurethane firimu ine maviri ari pachena ekurasikirwa nehuremu patembiricha yekuyedza, inoenderana nekuora kwekushisa kwechikamu chakaoma uye chikamu chakapfava. Kupisa kwekupisa kwekupisa kwechikamu chakapfava chakanyanya kukwirira, uye kupera kwehuremu kunotanga kuitika pa264 ° C. Panguva iyi tembiricha, inogona kusangana nezvinodiwa tembiricha yezvino yakapfava yekuisa chisimbiso yekuisa chisimbiso, uye inogona kusangana nezvinodiwa tembiricha yekugadzirwa kweotomatiki kurongedza kana kuzadza, kureba-kure midziyo yekufambisa, uye maitiro ekushandisa; tembiricha yekuora yekupisa kwechikamu chakaoma chakakwira, inosvika 347 ° C. Iyo yakagadziridzwa yakakwirira-tembiricha yekurapa-isina adhesive ine yakanaka kugadzikana kwekupisa. Iyo AC-13 asphalt musanganiswa nesimbi slag yakawedzera ne 2.1%.

3) Kana iyo simbi slag yemukati inosvika 100%, ndiko kuti, kana iyo imwechete particle size ye4.75 kusvika 9.5 mm zvachose inotsiva limestone, yakasara kugadzikana kukosha kweasphalt musanganiswa ndeye 85.6%, iyo 0.5% yakakwirira kupfuura iyo AC-13 asphalt musanganiswa pasina simbi slag; iyo kupatsanurwa kwesimba reshiyo ndeye 80.8%, iri 0.5% yakakwirira kupfuura iyo yeAC-13 asphalt musanganiswa pasina simbi slag. Kuwedzerwa kwehuwandu hwakakodzera hwesimbi slag kunogona kuvandudza zvakasara kugadzikana uye kupatsanura simba reshiyo ye AC-13 simbi slag asphalt musanganiswa, uye inogona zvinobudirira kuvandudza kugadzikana kwemvura yemusanganiswa weasphalt.

1)Pasi pemashandisirwo akajairika, iyo yekutanga viscosity ye solvent-based polyurethane adhesive yakagadzirwa nekuunza homemade hyperbranched polymers uye multifunctional polyisocyanates inotenderedza 1500mPa · s, ine viscosity yakanaka; hupenyu hweadhesive disc hunosvika 60 min, iyo inogona kuzadzisa zvizere nguva yekushanda zvinodiwa zvemakambani anochinjika ekurongedza mukugadzira.

2) Inogona kuonekwa kubva kusimba repeel uye kupisa kwesimbi yekusimbisa iyo yakagadziriswa inonamira inogona kurapa nekukurumidza pakamuri tembiricha. Hapana mutsauko wakakura mukumhanya kwekurapa patembiricha yekamuri uye pa40, 50, uye 60 ℃, uye hapana musiyano mukuru mukusimba kwekubatanidza. Iri rinonamira rinogona kupora zvachose pasina kupisa kwakanyanya uye rinogona kurapa nekukurumidza.

3) Ongororo yeTGA inoratidza kuti chinonamira chine kugadzikana kwakanaka kwekupisa uye chinogona kusangana nezvinodiwa tembiricha panguva yekugadzira, yekufambisa uye kushandiswa.