PTFE emulsion impregnation bụ isi usoro maka imepụta PTFE akwa akwa okpomọkụ . The isi PTFE mgbasa naanị adịghị mgbe niile mmiri, banye, ma ọ bụ nkekọ zuru okè na fiberglass ákwà. Iji nweta mkpuchi otu, njigide siri ike, na ebe enweghị ntụpọ, ndị na-emepụta ihe na-agbakwunye ọtụtụ ihe inyeaka na-arụ ọrụ.
Aokai PTFE akwalitela usoro impregnation n'ofe ọtụtụ ngwaahịa. Ntuziaka a na-akọwa ihe enyemaka asatọ kachasị - ihe ha na-eme, otu ha si arụ ọrụ, na mgbe eji ha.
Wetting na penetrating Agents – The isi mgbakwunye
Raw PTFE emulsion nwere dịtụ elu elu esemokwu, nke na-eduga na ogbenye infiltration n'ime emep uta eri na akwa. Ndị na-emepụta mmiri na-ebelata esemokwu elu, na-ekwe ka emulsion gbasaa ma banye nke ọma.
Usoro Chemours Capstone (agbụ dị mkpụmkpụ, enweghị PFOS/PFOA)
Esemokwu elu dị ala dị ala, ezigbo ntinye n'ime ihe ndị siri ike na mmiri. A ghaghị ịchịkwa usoro onunu ogwu ka ịzenarị arụmọrụ elu na-eweda ala mgbe ọ gbasasịrị.
Isi ihe edeturu: Fluorocarbon surfactants na-arụ ọrụ nke ukwuu mana ọ chọrọ iji nlezianya mee ya. Ngafe nwere ike ịkwaga n'elu mkpuchi n'oge sintering ma belata arụmọrụ na-adịghị mma.
Ndị na-eme akwa na Rheology Modifiers - Ijikwa mkpuchi mkpuchi
Thickeners na-edozi viscosity emulsion iji gbochie ntapu ma na-ahazi nha mkpuchi nke ọma.
Ịrụ ọrụ dị elu, thixotropy na-agbanwe agbanwe (nke a na-etinye na mmiri amonia)
Polyurethane associative thickeners (HEUR)
Ụdị HEUR
Ọkwa dị oke mma, mgbochi splash
Inorganic thickeners
Silica dị nro, bentonite
Mee ka thixotropy na nguzogide okpomọkụ; nwere ike ibelata mkpuchi doro anya
Ndụmọdụ bara uru: Maka mkpuchi dị gịrịgịrị, nke edo edo na akwa akwa siri ike, jiri usoro viscosity dị obere nwere obere mgbo. Maka akwa mkpuchi dị arọ ma ọ bụ akwa akwa nke mepere emepe, mụbaa thickener iji chịkwaa omimi ntinye.
Ndị na-achịkwa pH na Emulsion Stabilizers
Anionic surfactants na-emezi emulsions PTFE n'ozuzu ma na-edobe ya na pH 9-10 iji gbochie coagulation.
Mmiri Amonia (28 wt%): Onye na-ahazi ihe na-ejikarị eme ihe. Ọ na-agbanwe kpamkpam n'oge ihicha / sintering, na-ahapụghị ihe fọdụrụnụ nke na-emebi arụmọrụ.
Ihe nkwụsi ike inyeaka: Anionic surfactants dị ka sodium dodecyl sulfate (SDS) na secondary alkyl sulfonate (SAS) na-eme ka iguzogide emulsion n'oge mgbapụta na mkpali.
PTFE dị ọcha nwere ike njikọ na-adịghị ike nke nwere mkpụrụ. Ndị na-akwalite adhesion dị mkpa.
1. Silane njikọ njikọ
Ọmụmaatụ: Aminosilane (KH-550), epoxy silane.
Mechanism: Mgbe hydrolysis gasịrị, ha na-etolite kemịkalụ kemịkalụ na fiberglass - njikọ Si-O-Si n'etiti silane na iko, yana otu ndị na-arụ ọrụ organic na-emekọrịta ihe na PTFE ma ọ bụ polymers ndị ọzọ.
Kpachara anya: Ekwesịrị ịgbakwunye nke ọma ka ọ ghara imebi emulsion. Pre-hydrolysis ma ọ bụ post-ọgwụgwọ (itinye na ákwà tupu impregnation) na-atụ aro.
Ngwa: Ihe ndị bụ isi maka mkpuchi na-abụghị osisi na ihe eji eme ihe maka mgbasa ozi nzacha fiberglass impregnated na ihe akpụkpọ anụ. Ha na-eme ka adhesion na njikọta na ngwakọta ikpeazụ.
Ihe enyemaka na-emepụta ihe nkiri - Na-ebelata okpomọkụ
PTFE nwere nnukwu mgbaze viscosity. Ihe enyemaka na-emepụta ihe nkiri na-eme ka njikọ ahụ dị mfe n'oge mgbụsị akwụkwọ.
PFA (perfluoroalkoxy resin) - ebe mgbaze dị ala karịa PTFE
FEP (fluorinated ethylene propylene copolymer) - ebe mgbaze dị ala karịa PTFE
Ndị a na-agbaze-processable fluoropolymers na-etolite a wụrụ awụ nkekọ bonding n'etiti PTFE ahụ n'oge sintering, boosting mkpuchi compactness na interfacial adhesion. Ha bara uru karịsịa maka akwa mkpuchi ma ọ bụ mgbe achọrọ obere okpomọkụ.
Ihe ndochi arụrụ arụ – Ngwongwo omenala na-achọ
A na-achụsasị ihe ndị na-ejuputa ozugbo n'ime emulsion iji nye ihe ndị akọwapụtara.
Ụdị ndochi
Ihe atụ
Ebumnuche
Ihe ndochi na-eguzogide iyi
Nano/micron alumina, silicon carbide, silica
Melite nguzogide abrasion
Ndị na-emepụta ihe / antistatic fillers
Carbon ojii, graphite, carbon nanotubes (ya na ndị na-ekesa)
Wepụ ụgwọ kwụ ọtọ
Agba pigmenti
Iron oxide ojii, titanium dioxide
Koodu agba, mgbochi UV
Ihe dị mkpa: Fillers chọrọ ndị na-ekesa mmiri kwesịrị ekwesị (dịka ọmụmaatụ, polycarboxylates) iji gbochie agglomeration ma hụ na nkesa otu.
Defoamers - igbochi pinholes
Ọfụfụ siri ike na-eme n'oge impregnation, na-akpata ntụpọ pinhole na mkpuchi.
Ụdị
Atụmatụ
Ndị defoamers na-enweghị silicon (ọ masịrị)
Polyether dabeere, mineral mmanụ dabeere. Na-ewepụ ihe ize ndụ nke nsị silicone na-etinye aka na nrapado nke abụọ ma ọ bụ ọgwụgwọ elu.
Silicone defoamers
Ike imebi ụfụfụ dị ike, mana ojiji bụ naanị ngwa ebe a na-anabata ihe fọdụrụ na silicone.
Nkwanye: Maka teepu PTFE nke a ga-eji na njikọta ma ọ bụ mkpuchi dị elu, a na-ahọrọ ndị defoamers na-enweghị silicone.
Ndị na-eme ihe nkiri na-eme ihe nkiri - Ojiji oge ụfọdụ
A na-agbakwunye ihe mgbaze ma ọ bụ polyols (propylene glycol, ethylene glycol) mgbe ụfọdụ iji mee ka mmiri na-ekupụ ngwa ngwa ma gbochie mgbawa site na ihicha ngwa ngwa.
Ihe dị mkpa: A naghị ejikarị ihe ndị a eme ihe na nhazi usoro, n'ihi na ihe niile dị ndụ ga-ererịrị nke ọma n'oge nchịkọta. Ijibiga ihe ókè nwere ike ịhapụ carbon foduru.
Nchịkọta - Ịhọrọ ngwugwu inyeaka ziri ezi
Ebumnuche
Enyemaka akwadoro
Melite wetting na ntinye
Nonionic ma ọ bụ fluorocarbon wetting agent
Njikwa mkpuchi ibu
Thicker (cellulose ma ọ bụ HEUR)
Mee ka emulsion guzosie ike, gbochie coagulation
pH regulator (mmiri amonia) + anionic stabilizer
Kwado njikọ PTFE-substrate
Onye na-ahụ maka njikọta nke Silane ma ọ bụ PAI/PPS resin dispersion
Melite nhazi ihe nkiri, na-ebelata okpomọkụ
PFA ma ọ bụ FEP mgbasa
Tinye mgbochi iyi
Alumina ma ọ bụ silicon carbide filler
Tinye conductivity
Carbon ojii, graphite, ma ọ bụ CNT
Gbochie pinholes si na ụfụfụ
Defoamer na-enweghị silicon
Jiri nwayọ ihicha maka akwa mkpuchi
Humectant (propylene glycol) - jiri obere ntakịrị
Aokai PTFE nwere ike ịmepụta ngwakọta impregnation omenala maka ngwa akọwapụtara. Kpọtụrụ anyị na mkpụrụ osisi gị, ihe mkpuchi mkpuchi chọrọ yana ebumnuche arụmọrụ.
