Umahluko phakathi kweNeutral Silicone Sealant kunye neMedium Silicone Structural Adhesive

I. Umahluko kuKuqulunqwa kunye neNdlela yokuNyanga
1. I-Silicone Sealant engathathi hlangothi:

- Isithako esingundoqo: i-hydroxyl{1}}i-terinated polydimethylsiloxane. Inyanga nge-dealcoholization ngokufunxa umswakama ovela emoyeni, yenza i-elastomer eguquguqukayo ekuphiliseni.

- Inyanga kancinane (i-tack{1}}ixesha lasimahla malunga nemizuzu engama-30-60, unyango olupheleleyo luthatha iiyure ezingama-24-72), luyenze ilungele usetyenziso olufuna ukubekwa ngokutsha.

- Ayina asidi kwaye ayidleli{1}}kwi substrates njengentsimbi neglasi. I-pH yayo isondele kwi-neutral (6.5-7.5).

2. Isincamathelisi seSilikone esiPhakathi:

- Yongeza iisilane ezilungisiweyo okanye iiplastiki ukwenza imodyuli ephezulu -(elastic modulus Enkulu kuno okanye ilingana no 0.4 MPa) bondline phezu kokuphilisa. Ezinye iimveliso ziqinisekisiwe kumgangatho we-ASTM C1184.

- Unyango olukhawulezayo (i-tack{1}}ixesha lamahhala 20-imizuzu engama-40) kunye namandla obhondi obuphezulu (amandla okuqina Amakhulu okanye alingana ne-0.7 MPa, bhekisa kwi-GB 16776-2005), iyenze ilungele izakhiwo zokuthwala umthwalo.

II. Ukuthelekisa ukusebenza kunye neSicelo
1. IiPropati zoomatshini:

- I-Silicone sealants engathathi hlangothi idla ngokuba namandla e-tensile ye-0.5-1.0 MPa kunye nobude be-200% -300%, ibenza bafaneleke ukutywinwa kwamalungu aguquguqukayo (njengezikhewu phakathi kweengcango kunye neefestile).

- Izincamathelisi zesakhiwo se-silicone eziPhakathi zidla ngokuba namandla okuqina angaphezu kwe-1.0 MPa, kunye namanye amabakala aphezulu -amandla afikelela kwi-1.5 MPa (efana ne-Baiyun SS622). Ziyilelwe ngokukodwa usetyenziso oludityanisiweyo olufana neendonga zeglasi yomkhusane kunye nelitye elijingayo elomileyo{6}.

2. Ukumelana neMozulu kunye noHlelo loBubushushu:

- Zombini ziyaxhathisa iUV{1}}, kodwa izincamathelisi zesakhiwo sesilicone zinobude obubanzi bexesha elide -loluhlu lobushushu (-40℃ukuya 150℃, xa kuthelekiswa -50℃ukuya 120℃for neutral adhesives adhesives).

I-adhesives ye-silicone engathathi hlangothi igxininise ngakumbi ekukhuseleni amanzi kunye nokumelana nokubola (ngokuthobela i-GB / T 14683-2017), ngelixa i-adhesives yesakhiwo kufuneka idlule uvavanyo lwe-seismic (njenge-JIS A5758).

3. Usetyenziso oluqhelekileyo:

- I-adhesives ye-silicone engathathi hlangothi: Igumbi lokuhlambela lokuthintela amanzi kunye nokutywinwa, ukufakwa kwethayile, kunye nokutywinwa ngokubambisana kombhobho.

- Izincamathelisi zesakhiwo se-silicone eziPhakathi: -ephezulu{1}}iindonga zeglasi yesakhiwo esiphakamileyo, ikhonkco lesakhelo selanga, kunye nokuqinisa ishafti yeelevator.

III. Ukhuseleko lwesicelo
1. Ngaphambi kokufaka i-adhesives ye-silicone engathathi hlangothi, i-substrate surface kufuneka ihlambuluke ukuze igweme ukungcoliswa kweoli enokuchaphazela ukunamathela. I-adhesives yesakhiwo idinga i-substrate eyomileyo kunye nokusetyenziswa kwe-primer (umzekelo, i-aluminium idinga unyango olukhethekileyo).

2. Ii-adhesives zesakhiwo kufuneka zenziwe uvavanyo lokuhambelana (kubhekiselele kwi-ASTM C1087) ukuthintela ukusabela kweekhemikhali ngezinto zoqhagamshelwano.

Uthelekiso olungentla lubonisa ukuba nangona zombini ziyi-adhesives ye-silicone ye-organic, iinjongo zabo zoyilo kunye nezibonakaliso zokusebenza zihluke kakhulu. Abasebenzisi kufuneka bakhethe enye ngokusekelwe kwiimfuno zabo ezithile.