Ukusetyenziswa kwe-epoxy resin adhesives

I-epoxy resin adhesive(ebizwa ngokuba yi-epoxy adhesive okanye epoxy adhesive) yavela malunga no-1950, iminyaka engaphezu kwama-50 kuphela. Kodwa phakathi kwenkulungwane yama-20, ezahlukeneyo ithiyori encamathelayo, kunye chemistry ancamathelise, rheology incangathi kunye nomonakalo ancamatheleyo indlela kunye nezinye ezisisiseko umsebenzi wophando olunzulu inkqubela, ukuze iimpawu zokuncamathelisa, iintlobo kunye nezicelo baye benza inkqubela ngokukhawuleza. I-epoxy resin kunye nenkqubo yayo yokunyanga kunye neyodwa, intsebenzo ebalaseleyo kunye ne-epoxy resin entsha, i-ejenti entsha yokunyanga kunye ne-additives iyaqhubeka nokuvela, ibe yiklasi ye-adhesives ebalulekileyo kunye nokusebenza okugqwesileyo, iindidi ezininzi, ukuguquguquka okubanzi.
I-epoxy resin adhesive ukongeza kwiiplastiki ezingekho-polar ezifana ne-polyolefin bonding ayilungile, kwiintlobo zezixhobo zetsimbi ezifana ne-aluminiyam, intsimbi, intsimbi, ubhedu: izinto ezingezizo ezentsimbi ezifana neglasi, umthi, ikhonkrithi, njl. I-epoxy adhesive luphawu oluncamathelayo olunzima lwe-epoxy resin.
Ukuhlelwa ngokwemiqathango yokunyanga
I-adhesive yokunyanga ebandayo (akukho ncamashi yokunyanga ubushushu). Kwakhona yahlulwe yaba:

• Iqondo lobushushu eliphantsi lokunyanga incamathelisa, ubushushu bokunyanga <15 ℃;
• Iqondo lobushushu begumbi lokunyanga i-adhesive, ukunyanga ubushushu be-15-40 ℃.
• Ukuncamathelisa ukunyanga ubushushu. Inokwahlulwa kwakhona ibe:
• Iqondo lobushushu eliphakathi liphilisa incamathelisa, ubushushu obunyangayo malunga ne80-120 ℃;
• Iqondo lobushushu eliphezulu lokunyanga incangathi, ubushushu bokunyanga> 150 ℃.
• Ezinye iindlela zokuncamathelisa okuncamathelayo, okuncamathelayo ukukhanya, umphezulu omanzi kunye nokuncamathelisa okunyanga amanzi, ukuncamathelisa okufihlakeleyo.

I-epoxy adhesives ineenzuzo zilandelayo ngaphezu kwezinye iintlobo zokuncamathelisa:

1. I-epoxy resiniqulethe iindidi zamaqela e-polar kunye neqela elisebenza kakhulu le-epoxy, ngoko ke inamandla okunamathela anamandla kunye neentlobo zezixhobo ze-polar ezifana nentsimbi, iglasi, i-samente, iinkuni, iiplastiki, njl.
2. Akukho ngokusisiseko ii-volatiles ezisezantsi zemolekyuli eziveliswayo xa i-epoxy resin iphiliswa. Umthamo we-shrinkage we-adhesive layer incinci, malunga ne-1% ukuya kwi-2%, enye yeentlobo kunye ne-shrinkage encinci yokunyanga kwi-resin thermosetting. Emva kokongeza isigcwalisi sinokuncitshiswa sibe ngaphantsi kwe-0.2%. I-coefficient yokwandiswa komgca we-epoxy cured material nayo incinci kakhulu. Ngoko ke, uxinzelelo lwangaphakathi luncinci, kwaye lunempembelelo encinci kumandla okudibanisa. Ukongeza, i-epoxy enyangekileyo incinci, ngoko ke ukuzinza komda we-adhesive layer kulungile.
3. Kukho iintlobo ezininzi ze-epoxy resins, ii-agent zokunyanga kunye nezilungisi, ezinokuqulunqwa ngokufanelekileyo nangobuchule ukwenza i-adhesive kunye nenkqubo efunekayo (njengokunyanga ngokukhawuleza, ukunyanga ubushushu begumbi, ukunyanga ubushushu obuphantsi, ukunyanga emanzini, i-viscosity ephantsi, i-viscosity ephezulu, njl. ukuchasana, ukuhanjiswa kombane, ukuhanjiswa kwamagnetic, ukuhanjiswa kwe-thermal, njl.).
4. Ngeentlobo ezahlukeneyo zezinto eziphilayo (i-monomer, i-resin, i-rubber) kunye ne-inorganic substances (ezifana ne-fillers, njl. njl.) zihambelana kakuhle kunye ne-reactivity, kulula ukwenza i-copolymerization, i-crosslinking, ukuxuba, ukuzaliswa kunye nezinye izilungiso zokuphucula ukusebenza kwe-adhesive layer.
5. Ukumelana ne-corrosion efanelekileyo kunye neempawu ze-dielectric. Ukumelana ne-asidi, i-alkali, ityuwa, izinyibilikisi kunye nezinye i-corrosion yemidiya. Umthamo wokuxhathisa i-1013-1016Ω-cm, amandla e-dielectric 16-35kV / mm.
6. Iinjongo eziqhelekileyo ze-epoxy resins, ii-agent zokuphilisa kunye nezongezelelo zinemvelaphi emininzi, imveliso enkulu, kulula ukuyiqulunqa, inokubunjwa koxinzelelo loqhagamshelwano, ingasetyenziswa kwinqanaba elikhulu.

Indlela yokukhethaepoxy resin

Xa ukhetha i-epoxy resin, kukho izinto ezininzi ekufuneka ziqwalaselwe, kubandakanya:

1. Sebenzisa: Ngaba i-epoxy ingasetyenziselwa injongo jikelele okanye izicelo ezingaphezulu zoshishino?
2. Ubomi bokusebenza: Kuya kufuneka ukuba i-epoxy isetyenziswe ixesha elingakanani ngaphambi kokunyanga?
3. Ixesha lokunyanga: Kuya kuthatha ixesha elingakanani ukuba imveliso inyange kwaye inyangwe ngokupheleleyo usebenzisa i-epoxy?
4. Iqondo lobushushu: Le ndawo iza kusebenza kweliphi izinga lobushushu? Ukuba uphawu luyanqweneleka, ngaba i-epoxy ekhethiweyo ivavanyelwe ubushushu obugqithisileyo?

Iimpawu:

• Iimpawu eziphezulu ze-thixotropic, zingasetyenziselwa ukwakhiwa kwe-façade.
• Iimpawu eziphakamileyo zokhuseleko lokusingqongileyo (inkqubo yokunyanga i-solvent-free).
• Ukuguquguquka okuphezulu.
• Amandla okudibanisa okuphezulu.
• Ukufakwa kombane okuphezulu.
• Iimpawu ezigqwesileyo zoomatshini.
• Ubushushu obugqwesileyo kunye nokumelana namanzi.
• Uzinzo olugqwesileyo lokugcina, ixesha lokugcina ukuya kwi-1 unyaka.

Isicelo:Ukudityaniswa kweentsimbi ezahlukeneyo kunye nezingezizo iintsimbi, ezinje ngoomazibuthe, iialloys zealuminium, izinzwa, njl.