( onawo polymer® PTFE uye polymer® FEP & PFA Specifications ) PTFE's mechanical properties ishoma kana ichienzaniswa nemamwe mapurasitiki, asi maitiro ayo anoramba ari pamwero unobatsira pamusoro pekupisa kukuru kwe -100 ° F kusvika +400 ° F (- - 73°C kusvika 204°C).
Yakajairika Properties yepolymer® PTFE Fluoropolymer Resins
Tembiricha kuramba
Matembiricha ari pamusoro pe77°C haakodzeri zvikamu zveazhinji elastomers nemapurasitiki, nepo PTFE inoshingirira tembiricha yakakwira kusvika 260°C.Kunyange pasi pe77°C, kana maasidhi anokonzera simbi uye organic solvents akasanganiswa, liner uye zvikamu zvePTFE zvinowanzofarirwa nekuti elastomers nemamwe mapurasitiki anowanzo shaya kurwisa kuzvimba kwe solvent uye kupfava.
Kemikari Inertness
NeKemikari inertness, tinoreva kuti PTFE fluorocarbon resin inogona kuramba ichisangana nechimwe chinhu pasina chinooneka chemakemikari maitikiro ari kuitika.Kazhinji, PTFE fluorocarbon resins ndeyemakemikari inert.Zvakadaro, chirevo ichi, sezvese generalizations, chinofanirwa kuve chakakodzera kana chichizove chakarurama.Iko kufanirwa hakuzokonzeri kuvhiringidzika, zvisinei, kana munhu akachengeta mupfungwa izvo zvakakosha nezve maitiro ePTFE resins.
Iyo yakajairika tsananguro pfupiso yeakasiyana bvunzo data inogona kutsausa, nekuti inogona kusunganidzwa pamwechete akasiyana marudzi e "Chemical" maitiro.Kana tsananguro ichizojeka, inofanirwa kusiyanisa pakati pekuita kwemakemikari nezviito zvemuviri zvakaita sekunyura.Tsananguro yacho inofanirwa kugonesa mushandisi kuti atarise hukama hwemuviri nemakemikari zvimiro izvo zvinogona kukanganisa imwe application.
Semuenzaniso, PTFE resins haizogadziriswi nekunyudzwa mu aqua regia.Asi kana tembiricha uye mhedzisiro yekumanikidza kweiyi reagent yakakwira, kutorwa kwezvikamu zveiyo reagent muresin kuchawedzerawo.Kuchinja kunotevera, kwakadai sekukasira kurasikirwa nekumanikidzwa, kunogona kukuvadza mumuviri nekuda kwekuwedzera kwemhute yakanyudzwa muresin.Zviripachena, saka, kana tichitaura nezvemakemikari ePTFE tinofanira kusiyanisa pakati pemaitiro emakemikari chaiwo, sezvatakataura maererano ne "Chemical compatibility" uye zviito zvemuviri, zvakadai se "absorption" yakasanganiswa ne mechanical uye thermal stress.
Mukati metembiricha yekushandiswa kwakajairika, PTFE resin inorwiswa nemakemikari mashoma pane kutara makemikari ayo anowirirana nawo.Aya mareactants ari pakati peakanyanya chisimba oxidizer uye ekudzikisa agent anozivikanwa.Elemental sodium muhukama hwepedyo nefluorocarbons inobvisa fluorine kubva mupolymer molecule.Kuita uku kunoshandiswa zvakanyanya mumhinduro dzeanhydrous yekumisikidza nzvimbo dzePTFE kuitira kuti resin igone kunamatira.Imwe alkali simbi (potassium, lithium, etc.) inoita zvakafanana.
Mune zvimwe zviitiko panguva kana pedyo neyakakurudzirwa sevhisi yekumisa tembiricha ye260°C yeTFE & PFA, uye 204°C yeFEP, makemikari mashoma ari pamazinga akanyanya anonzi anoshanda akananga kuPTFE.Kurwiswa kwakafanana nesodium etch kwakagadzirwa pakupisa kwakanyanya kwakadaro ne80% NaOH kana KOH, metal hydrides yakadai seboranes (eg, B2H6), aluminium chloride, ammonia (NH3), uye mamwe amines (R-NH2) uye imines ( R = NH).Zvakare, kunonoka oxidative kurwisa kwakaonekwa ne70% nitric acid pasi pekumanikidzwa pa250 ° C.Kuyedzwa kwakakosha kunodiwa kana kunyanyisa kwakadaro kwekudzikisa kana oxidizing mamiriro akasvikirwa.
Absorption
Mukupesana nesimbi, mapurasitiki uye elastomers anotora huwandu hwakasiyana hwezvinhu zvavanobata, kunyanya zvinwiwa zveorganic.Absorptivities muPTFE yakaderera zvisingaite, uye kemikari inopindirana pakati pepurasitiki nezvimwe zvinhu ishoma (nezvishoma zvakasara zvakambotaurwa).Nekudaro, kana kunyura kwasanganiswa nezvimwe zvinokonzeresa, ichi chivakwa chinogona kukanganisa kushanda kwemarezeni aya mune imwe nzvimbo yemakemikari.Semuenzaniso, kana kukurumidza kushanduka kwekushisa kana kumanikidzwa kukaitika, mamiriro ezvinhu anogona kugadzirwa anokuvadza muviri.Iyo yakakura sevhisi tembiricha yemhando yePTFE resin inovaisa kune iyi mhando yekukuvara kwemuviri kazhinji kune mamwe mapurasitiki.
Nenzira yekutsanangura, ngatifungei nezve "steam cycle" bvunzo inotsanangurwa muATSM miyero* yepombi ine mitsetse.Masamples epombi yakamisikidzwa anoiswa pasi pe 0.8MPa (125 psi) chiutsi, chichichinjika nemvura inotonhora yakaderera, zvichikonzera kudziyisa kwakanyanya uye kudzikama kwesimba chaizvo.Izvi zvinodzokororwa kwe100 cycles.Steam yakagadzira kudzvanywa uye tembiricha gradient kuburikidza ne liner zvichikonzera kunyura kwehuwandu hudiki hwehutsi hunonangana kumvura mukati memadziro e liner.Pakusunungurwa kwekumanikidzwa, kana pakudzoreredzwa kweutsi, mvura yakavharirwa inogona kuwedzera kuita mhute ichikonzera yekutanga micro pore.Iyo inodzokororwa kudzvinyirirwa uye kupisa bhasikoro kunowedzera iyo micro pores, pakupedzisira ichikonzera inooneka inozadzwa nemvura mablister mukati me liner.Miyero yeASTM inocherekedza kuti mablister haakonzerese kuita kwepombi liner - iyo kemikari barriers ukobvu ichiri yakasimba.
Kune nhanho dzekuora dzinoderedza hukasha hwekuputika.Thermal insulation yepombi yakamisikidzwa kana mudziyo inoderedza tembiricha gradient mu liner, nokudaro kazhinji kudzivirira condensation uye kunotevera kuwedzera kwemvura yakanyura.Yakaderedzawo kukurumidza uye hukuru hwekushanduka kwekushisa, nokudaro kuderedza mablistering.Saka, nekudzikisa resin, insulation inogona kupa chiyero chekudzivirira muzviitiko zvakawanda.Kuwedzera dziviriro kunogona kupihwa nekushandisa maitiro ekushanda kana zvishandiso zvinodzikamisa mwero wekudzikisa kudzvanywa kwemaitiro kana kuwedzera tembiricha.
Permeation
Permeation chinhu chine hukama zvakanyanya nekunyura, asi zvakare ibasa remamwe maitiro emuviri, sekupararira uye tembiricha.Mumakore anopfuura makumi maviri echiitiko nePTFE yakamisikidzwa pombi, kuwanda kwekutadza kunokonzerwa nekupinda kwemhute inoora ichiteverwa nekuora kwenhengo yerutsigiro kwave kushoma zvinoshamisa.Ukobvu hwe liner hwe 1.27 kusvika 6.35mm hunodiwa pakusimba kwemuviri pane tembiricha yepamusoro inoderedza kupinza kusvika padanho rekuti kazhinji kudiki kufunga.Nekuti akawanda machinjiro anokanganisa kupinza, zvinorasisa kushandisa marabhoritari permeability data yakawanikwa nemafirimu epolymer akatetepa sehwaro hwekusarudzwa kweiyo fluoroplastic polymer linings.Nezvishoma zvishoma, misiyano yekugonesa pakati pefluoroplastics haina basa shoma pakuita kwepombi dzakagadzirwa nemidziyo.Kuita kunodzorwa zvakanyanya nekugadzira, kugadzira uye kutonga kwemhando.Nekudaro, chinonyanya kunetsa chinowanzo kuve nekunyura, sezvo ichi chiri chiratidziro chinonyanya kuratidza kushanda kwefluorocarbon resin munzvimbo yakapihwa makemikari.
Mumachira asina kuganhurwa, zvakakosha kuti nzvimbo iri pakati pe liner nenhengo yerutsigiro ipinde mumhepo, kwete kungobvumira kubuda kweminiti yehuwandu hwehupfu asi kudzivirira kuwedzera kwemhepo yakavharirwa kubva pakudonha kwe liner.Zvakare, mavheti aya anoshandiswa kuyedza kudzora kwemhando yepombi yakamisikidzwa uye semudziyo wekuchengetedza kuratidza kuvuza kana kukuvara kwe liner.Kudonha kweLiner kunowanzo kuverengerwa kupenyerera asi chokwadi chikonzero chikuru chiri kuitika kwevacuum murukova rwekuita.Vagadziri vepombi ine lined vanoshambadzira kupikisa kwevacuum payakatemerwa tembiricha yehukuru hwavo hwakasiyana uye hukomba hwe liner, asi dzimwe nguva zvinodikanwa kudzivirira vacuum yakawandisa nemaitiro ekugadzira uye maitiro ekushanda.
Nguva yekutumira: Feb-14-2019