Melamine-formaldehyde resin (MFR) bụ amino resin na-ekpo ọkụ nke nwere ezigbo isi ike, nkwụsi ike ọkụ, na nghọta. E jiri ya tụnyere urea-formaldehyde resin (UF), resin MF nwere nguzogide mmiri ka mma yana nguzogide ihu igwe. Ya mere, a na-ejikarị ya eme ihe na mkpuchi panel nke dị n'èzí, ihe eji achọ mma n'ala osisi na ngwaahịa veneer. Otú ọ dị, adịghị ike dị ka mgbawa dị elu, mgbawa dị mfe, na obere oge nchekwa nke melamine formaldehyde resin na-egbochi ngwa ya. A na-ejikarị resin MF akwadebe akwụkwọ ihe nkiri nrapado etinyere. Plywood na blockboard chere ihu akwụkwọ ihe nkiri nrapado a gbanyere mkpọrọgwụ ka a na-akpọkọta bọọdụ ebe obibi. Ndị na-azụ ahịa na-ahụ ha n'anya n'ihi na ha na-eguzogide iyi, mgbochi mmiri, na agba dị iche iche.
Agbanyeghị, mgbe iru mmiri gburugburu na-agbanwe, ihe ntọala bọọdụ gburugburu ebe obibi na-enwekarị ọzịza ma ọ bụ mbelata, na-ebute nrụgide dị n'ime na-enweghị isi. N'elu oyi akwa nke MF resin na-akụrikasị ma nwee mgbanwe na-adịghị mma, ọ na-enwekwa ike ịgbawa n'okpuru nrụgide. Ya mere, imeziwanye mgbanwe nke MF resin na imeziwanye nsogbu nrịkasị ahụ bụ isi ihe na-edozi nsogbu nke resin cracking na imeziwanye àgwà nke ihe eji achọ mma. Edemede a na-achịkọtakarị ọganihu nke nyocha na ngbanwe siri ike nke MF resin, n'ebumnuche inye nduzi usoro iwu na ntọala teknụzụ maka idozi nsogbu nrịkasị nke resin MF.
1. MF njirimara nhazi
MF resin bụ triazine mgbanaka polymer kpụrụ site na condensation nke melamine na formaldehyde na jikọtara methylene ma ọ bụ ether bond. Ọ nwere akụrụngwa kemịkalụ kwụsiri ike yana usoro siri ike. E kewara nhazi nke resin MF ụzọ abụọ: ọkwa mbụ bụ mmeghachi omume mgbakwunye nke melamine na formaldehyde. N'okpuru ọnọdụ nnọpụiche ma ọ bụ alkaline, melamine na-enweta hydroxymethylation iji mepụta 9 hydroxymethylmelamines dị iche iche. Nkeji nke abụọ bụ mmeghachi omume condensation. Melamine na-emeghachi omume na melamine methylolated, ma ọ bụ methylolated melamine na-enweta condensation nke onwe ya iji mepụta oligomers jikọtara site na methylene na ether bonds. Na gburugburu ebe nwere uru pH nke 7 ruo 8, njikọ njikọ methylene na-achịkwa; na gburugburu ebe nwere uru pH dị elu karịa 9, njikọ njikọ ether nwere ike ịmalite.
Mgbe ị na-ejikọta ya na ọgwụgwọ nke MF resin, a na-enweta ihe mkpuchi na-egbuke egbuke nke na-eguzogide ọgwụ, acid na alkali na-eguzogide. Ọ bụ ezie na mkpuchi a gwọrọ nwere nnukwu ike, ọ na-agbajikwa. Isi ihe kpatara ya bụ na resin MF nwere ọnụ ọgụgụ dị ukwuu nke mgbanaka triazine jikọtara na otu methylene. Mgbanaka triazine kwụsiri ike nke ukwuu n'okpuru ọnọdụ mmetụta na ọ siri ike nrụrụ na ịmịnye ike mmetụta. Naanị njikọ methylene nwere ike ịmịnye ọtụtụ ume, na-eme ka njikọ methylene gbajie ma gosipụta nhụsianya. Ngwọta resin MF ezughị ezu ga-eme ka resin gbawa. Ebe ọ bụ na ọgwụgwọ resin na-apụtakarị n'etiti otu hydroxyl, ụfọdụ otu hydroxyl ndị na-esonyeghị na condensation ga-anọgide na resin mgbe a gwọchara ya. Otu hydroxyl ndị a nwere ụfọdụ hygroscopicity. Ka iru mmiri gburugburu ebe obibi na-agbanwe ugboro ugboro, otu hydroxyl n'efu ga-enweta usoro hygroscopic na desorption ma jiri nwayọọ nwayọọ na-ebute nrụgide, na-eme ka mgbawa na mkpuchi resin na-emetụta ọdịdị na arụmọrụ nke ngwaahịa ahụ.
Enwere ike imezi mgbanwe nke resin MF nke ọma site n'ibelata njupụta njikọ njikọ nke MF resin na ịgbatị ogologo yinye ya na-agbanwe agbanwe. Otú ọ dị, mbelata nke njupụta na-ejikọta ọnụ pụtara na a na-agbasasịkwa usoro siri ike nke mgbanaka triazine na resin. Ya mere, nkwụsi ike elu na iyi nguzogide MF resin ga-emetụta ogo dị iche iche. Mgbe ị na-eme mgbanwe mgbanwe siri ike, ekwesịrị ịkpachara anya iji nọgide na-esi ike nke resin MF ma ghara ibibi ihe ndị dị n'elu ya. Ịhọrọ usoro mgbanwe kwesịrị ekwesị iji melite mgbanwe nke resin MF dị oke mkpa maka ịgbasa ngwa ngwa nke resin MF.
2. Usoro ngbanwe siri ike nke resin MF
A na-ejikarị mgbanwe na-eme ka ike sie ike iji kwalite ike nke ndị na-emekọ ihe ọnụ na-ejikọta ọnụ iji meziwanye mmetụta nguzogide na ike ọgwụgwụ nke polymer na-emebighị isi ike mbụ na nkwụsi ike nke polymer. Usoro mgbanwe siri ike dabara adaba maka resin MF nwere ike kewaa n'ụdị abụọ, ya bụ mgbanwe mpụ siri ike na mgbanwe ngbanwe nke ime. Mgbanwe nke siri ike nke mpụga na-ezo aka ịgbakwụnye otu agba agba ume na resin MF site na ịgwakọta iji mepụta usoro ejikọtara ọnụ na resin MF iji gbochie mgbanaka triazine ịbịaru ibe ha nso iji nweta ebumnuche nke ịgba ume. Ụzọ mgbasi ike mpụga nke a na-ejikarị maka resin MF gụnyere:
1) Tinye nano-SiO2, nano-cellulose na ndị ọzọ nanoparticles;
2) Jiri polymers ogologo yinye na-agbanwe agbanwe dị ka polyethylene glycol copolymers iji mepụta netwọk polymer interpenetrating (IPNS) na resin MF;
3) Jiri eriri ihe dị ka polyvinyl chloride jikọọ MF resins ọnụ iji welie nkwụsi ike nke resin Ọdịdị.
Mgbanwe ngbanwe nke ime ime na-agbanwe usoro ihe omimi nke MF resin site na isonye na mmeghachi omume ọgwụgwọ nke resin MF, ịgbatị njikọ na-agbanwe agbanwe n'etiti mgbanaka triazine, yana ibelata njupụta njikọ njikọ iji nweta mmetụta siri ike. Ụzọ nke ime ihe ike gụnyere:
1) Webata ụmụ irighiri akwara ogologo ogologo na-agbanwe agbanwe n'etiti mgbanaka triazine nke MF resin iji gbasasịa ihe owuwu siri ike;
2) Jiri silicone gbasaa njikọ na-agbanwe agbanwe n'etiti MF resins;
3) Gbochie otu ọrụ hydroxyl nke MF resin ma belata njupụta njikọ njikọ nke resin. Ihe ngbanwe nke ime ihe siri ike nke a na-ejikarị gụnyere mmanya polyvinyl, polyurethane, caprolactam, wdg.
3. Ihe pụrụ iche chọrọ maka resin MF maka impregnation
Enwere ọtụtụ ụzọ siri ike maka resin MF, mana ọ bụghị ha niile dabara adaba maka itinye resin MF. The toughening mgbanwe nke impregnating MF resin ga-eme mgbanwe na mmepụta ọnọdụ nke nrapado film akwụkwọ, otú o nwere ụfọdụ pụrụ iche chọrọ. Mgbe ị na-eji MF resin maka impregnation, anyị kwesịrị ọ bụghị nanị na-atụle mgbape mgbape, na-eyi nguzogide na mgbanwe mgbe agwọ ọrịa nke resin, ma ṅaa ntị na fluidity, permeability na tupu ọgwụgwọ ogo nke gbanwetụrụ resin tupu ọgwụgwọ.
Mmiri mmiri na-adịghị mma nke resin MF ga-eme ka okooko osisi akọrọ n'elu akwụkwọ mpempe akwụkwọ na-ekpuchi ihe nkiri, na-emepụta ntụpọ ọcha na-acha ọcha n'elu ngwaahịa ahụ, na-emepụta ntụpọ n'elu. Nkwadebe na-adịghị mma nke resin MF ga-eme ka impregnation ezughị ezu, na-ebute enweghị gluu ma ọ bụ elu na-enweghị isi n'elu ngwaahịa ahụ. Inorganic nano-eyi na-eguzogide ihe nwere ike ime ka ike na eyi na-eguzogide Njirimara nke MF resin, ma n'otu oge ahụ ha ga-amụba viscosity nke MF resin na ibelata fluidity nke resin, si otú na-emetụta impregnation arụmọrụ nke MF resin. Anyị chọpụtara na viscosity nke resin MF na-abawanye site na mmụba nke ọnụọgụ nano-SiO2 (HTSi-03) na-eguzogide iyi. Viscosity nke usoro resin MF gbanwetụrụ bụ 20.9 s (25 Celsius C), na akụkụ kọntaktị dị n'etiti resin MF na akwụkwọ eji achọ mma mụbara site na 5 ° ruo 30 °. N'otu oge ahụ, mmiri mmiri na-ebelata, nke mere na MF resin enweghị ike imejupụta oghere ndị dị na akwụkwọ a na-achọ mma, na mkpuchi na-ekpuchi ya enweghị ike ichekwa ya nke ọma, na-eme ka mbelata na-eguzogide iyi.
Ogo dị ala tupu ọgwụgwọ nke MF resin ga-eme ka mgbanwe dị elu n'oge usoro veneer, na-eme ka ifuru mmiri dị elu na-emetụta arụmọrụ elu. Polyhydroxyl mmanya modifiers nwere ike n'ụzọ dị irè na-amụba mgbanwe nke MF resin, ma ụfọdụ hydrophilicity nke polyhydroxyl modifiers adịghị akwado ihicha nke impregnated nrapado film akwụkwọ, si otú ibelata tupu ọgwụgwọ ogo nke MF resin. Nke a na-ebute nsogbu dị ka mmịnye mmiri na nchikota nke akwụkwọ ihe nkiri nrapado na-esiri ike ịnweta. N'otu oge ahụ, akwụkwọ ihe nkiri na-egbuke egbuke nke na-eme ka ọ dị ala nke na-agwọ ọrịa dị ala ga-eme ka mmiri dị ukwuu n'oge usoro ịpị ọkụ na-ekpo ọkụ, na-eme ka nsogbu dị ka ụda olu nke ntanye ntanye na mgbawa nke resin Layer, na-emetụta arụmọrụ nke ngwaahịa ahụ.
Ya mere, n'ịtụle nsogbu mmepụta ihe n'ezie, onye na-ahụ maka resin resin MF nke a na-eji maka impregnation kwesịrị iji onye na-eme mgbanwe nwere obere molekụla dị ala, ọdịnaya hydroxyl dị ala, na mmeghachi omume dị elu iji belata mmetụta nke modifier na mmiri mmiri na tupu ọgwụgwọ nke MF resin. N'otu oge ahụ, a na-achọrọ onye na-eme ihe ike ka ọ kwekọọ na ọnọdụ ọgwụgwọ nke MF resin a na-eji maka impregnation, ma ka na-enwe mmetụta mgbanwe mgbe ọgwụgwọ na-ekpo ọkụ gasịrị.
Mgbanwe nke resin MF maka impregnation kwesịrị ịtụle ọtụtụ ihe n'otu oge. Ihe ngbanwe dị mma ga-eme ka mgbanwe nke MF resin na-enweghị emetụta ihe na-adịghị mma n'elu nguzogide iyi, mmiri ma ọ bụ usoro ọgwụgwọ tupu oge eruo. Ya mere, a na-atụ aro na a ga-eme nchọpụta n'ọdịnihu banyere ngbanwe nke resin MF site na akụkụ atọ ndị a.
1) Dabere na nhazi nke resin MF, enwere ike idozi nsogbu brittleness nke resin MF site n'ịgbanwe njupụta njikọ njikọ nke MF resin.
2) Ijikọta usoro siri ike dị iche iche, webata usoro agbụ a na-agbanwe agbanwe na ndị otu na-arụ ọrụ dị iche iche n'ime resin MF, ma na-abawanye mgbanwe nke resin MF site na njikọta anụ ahụ na mmeghachi omume kemịkal.
3) Site n'echiche nke ime ka usoro mmepụta ihe dị mfe na ịchekwa ego, họrọ ndị na-eme mgbanwe dị ukwuu maka mmepụta mmepụta ihe.
Maka ozi ndị ọzọ gbasara SINOYQX modified melamine formaldehyde resin, biko kpọtụrụ anyị site na email: [email protected] , ma ọ bụ kpọọ anyị oku na: +86-28-8411-1861.
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