Ukukhetha onqenqemeni sealing hot melt ingcina

Ukuvalwa komngceleokunamathelayo okuncibilika okushisayo iwuhlobo lokunamathisela olusetshenziswa ngokukhethekile ukuvala uphawu lwamapulangwe okwenziwa. Kuyingcina ye-thermoplastic engena-solvent. Lapho ingcina encibilikayo eshisayo ishiselwa ezingeni lokushisa elithile, iyashintsha isuke esimweni esiqinile iye esimweni sokuncibilika. Uma isetshenziswa ebusweni be-substrate yephaneli esekwe ngokhuni noma into yokuvala onqenqemeni, ipholisa ibe yisimo esiqinile, futhi izinto zokuvala onqenqemeni kanye ne-substrate kuhlanganiswe ndawonye. Ukukhethwa kanye nokusetshenziswa kwe-adhesive hot melt enamathelayo, izici ezilandelayo kufanele zinakwe:

1. Isisekelo sezinto zokuvala onqenqemeni okunamathelayo okuncibilika okushisayo

Ukuvalwa komngceleokunamathelayo okuncibilika okushisayos ingahlukaniswa izigaba ezintathu ngokuya ngezinto eziyisisekelo ezahlukahlukene:

(1)I-EVA (i-ethylene-vinyl acetate copolymer resin) ingcina yensimbi eshisayo encibilikayo, lokhu okunamathelayo okuncibilika okushisayo kungahlukaniswa ngezinhlobo ezimbili nge-filler futhi ngaphandle kokugcwalisa. ,

(2)I-POL YAMIDE (i-polyamide) ingcina enamathelayo encibilikayo eyisisekelo, lolu hlobo lwe-adhesive encibilikayo eshisayo lunezici zokumelana nokushisa okuhle nokuphulukiswa ngokushesha, kodwa okubi okuyinhloko ukuthi kuyabiza.

(3)I-HMPU (i-polyurethane) ingcina yensimbi eshisayo encibilikayo, okuwuhlobo lwe-adhesive encibilikayo eshisayo esebenza kahle kakhulu, futhi isiqinisekiso sokuvaleka konqenqema lweshidi lwekhwalithi ephezulu. Kuyabiza futhi kudinga ukusetshenziswa okukhethekile.

2. Viscosity of onqenqemeni sealing hot melt ingcina

I-viscosity yokuvalwa konqenqemaokunamathelayo okuncibilika okushisayo ayibonisi ngokuqondile ukusebenza kwe-adhesive. Ngokuvamile, ukuphakama kwe-viscosity konqenqema okuvalwa kwe-adhesive hot melt, kuba ngcono amandla ayo okuqala okudonsa, kodwa kubi kakhulu ukusebenza kwe-coating. Izinamatheliso ezincibilika ezishisayo ezine-viscosity eziphansi zinenani elincane leglue kanye nezakhiwo ezingcono zokumanzisa. Amanye ama-adhesive ancibilikayo ashisayo ane-viscosity ephansi kanye nesivinini sokuphulukisa ngokushesha angase abe namandla aphezulu okudonsa. Kumabhodi ezinhlayiya anekhwalithi ephansi, izinamathiselo ezincibilikayo ezishisayo ezine-viscosity ephezulu kufanele zisetshenziselwe ukuvala onqenqemeni. Lokhu kungenxa yokuthi izinto zokunamathisela ezincibilikayo ezine-viscosity ephezulu zine-fluidity ephansi futhi akulula ukungena ezimbotsheni zonqenqema lwezinhlayiya njengezinamatheliso ezincibilikayo ezincibilikayo ezine-viscosity ephansi. , ukuze i-adhesive encibilikayo eshisayo ifakwe ngokugcwele emaphethelweni ebhodi.

3. Ukuminyana kokuvala onqenqemeni okunamathelayo okuncibilika okushisayo

Ukuminyana kokuvalwa komkhawulookunamathelayo okuncibilika okushisayo ngokuvamile i-0.95-1.6g/cm3, futhi ukuminyana kwayo kuncike enanini lokugcwaliswa (uma isigcwalisi esiningi, siphezulu ukuminyana). Kusukela endaweni ethile yei-gluing iyadingeka ukuze kufakwe uphawu onqenqemeni lweshidi, inani le-gluing ngobude beyunithi ngayinye ye-meltadhesive eshisayo engagcwalisiwe ene-low density incane kunaleyo ye-adhesive okunamathelayo okuncibilika okushisayo egcwele. Futhi ngenxa yokuthi ingcina ye-hot melt engagcwalisiwe inokusebenza okungcono kokubopha futhi ifinyelela umphumela ofanayo wokuvala onqenqemeni, kungenzeka ukuthi ingcina ye-hot melt engagcwalisiwe isetshenziswe ngenani elincane kune-adhesive hot melt egcwalisiwe. Ukuze unciphise inani leglue, umshini wokubopha onqenqemeni kufanele ube nesistimu yeglue enhle.

4. Iphuzu lokuthambisa kanye nezinga lokushisa lokuvala onqenqemeni lokunamathisela okuncibilikayo okushisayo

Iphuzu lokuthambisa liyinkomba yokumelana nokushisa kokuvala onqenqemeniokunamathelayo okuncibilika okushisayo.Uma iphoyinti lokuthambisa liphakeme, mancane amathuba okuthi ingcina encibilikayo evaleke onqenqemeni izoncibilika. Ngesikhathi esifanayo, iphuzu lokuthambisa liphinde libe yisici esibalulekile sokulinganisa ukumelana nokushisa kwefenisha yephaneli. E-Europe, kube nesethi yezindlela zokuhlola ukumelana nokushisa kokubekwa uphawu konqenqema lwephaneli, futhi kuphakanyiswe izinga lokumelana nokushisa kwefenisha yephaneli.

Izinga lokushisa elisetshenziswayo lokunamathela onqenqemeni lokuncibilika okushisayo libhekisela emazingeni okushisa lapho i-gluing roller yomshini wokuvala onqenqemeni inamathiselwe khona. Kuphela kuleli zinga lokushisa, i-adhesive hot-melt ingafinyelela amandla amahle kakhulu okunamathela. Kunephutha elikhulu phakathi kwezinga lokushisa eliboniswa kweminye imishini yokubopha onqenqemeni kanye nezinga lokushisa langempela, ngakho izinga lokushisa lomshini kufanele lihlolwe njalo. Uma izinga lokushisa lomshini wokubopha onqenqemeni liphezulu kakhulu, iglue izoba carbonized futhi ibhenywe; uma iphansi kakhulu, amandla okunamathela azoncishiswa.

5. Isikhathi sokuvula se-edge sealing seal okunamathelayo okuncibilika okushisayo kanye nesivinini sokuphakela somshini wokuvala onqenqemeni.

Isikhathi sokuvula se-edge-sealingokunamathelayo okuncibilika okushisayo ibhekisela esikhathini kusukela ekuqaleni kokunamatheliswa komshini wokuvala onqenqemeni kuze kube isikhathi ngaphambi kokuba i-tape yokuvala onqenqemeni icindezelwe ku-substrate. Isikhathi sokuvula siyahlukahluka ngohlobo lweglue. Ijubane lokudla lomshini wokubopha onqenqemeni lihlobene eduze nesikhathi sokuvula, kokubili okubaluleke kakhulu ekukhethweni nasekusetshenzisweni kwezinamathelisi ezincibilikayo ezishisayo. Umshini wokuhlanganisa onqenqemeni odla ngokushesha kufanele ukhethe ingcina encibilikayo eshisayo enesikhathi esifushane esivulekile, futhi okuphambene nalokho, ingcina encibilikayo eshisayo enesikhathi eside evulekile.