Thermoplastic Powder Paint - Mutengesi, Develope, Pros uye Cons

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China PECOAT® nyanzvi mukugadzira uye kutumira kunze kwenyika kwe thermoplastic poda pendi, chigadzirwa chine polyethylene upfu penda, pvc hupfu penda, hupfu hwenaironi pendi, uye fluidized bed dipping midziyo.

Nhoroondo Yekuvandudza yeThermoplastic Powder Paint

Kubva dambudziko remafuta muma1970s, machira ehupfu akakurumidza kusimukira nekuda kwekuchengetedza zviwanikwa, hushamwari hwezvakatipoteredza, uye kukodzera kugadzira otomatiki. Thermoplastic poda pendi (inonziwo thermoplastic poda coating), imwe yemhando mbiri huru dzependi yehupfu, yakatanga kubuda mukupera kwema1930s.

Mumakore ekuma1940, nekuvandudzwa kweindasitiri yepetrochemical nemamwe maindasitiri, kugadzirwa kwemarezeni akadai sepolyethylene, polyvinyl chloride, uye polyamide resin kwakakurumidza kuwedzera, zvichikonzera kutsvagisa kwependi yehupfu hwethermoplastic. Pakutanga, vanhu vaida kushandisa makemikari akanaka ekupikisa polyethylene kuti vaise kune simbi coating. Zvisinei, polyethylene haina kunyungudika muzvinonyungudutsa uye haigoni kuitwa mu-solvent-based coatings, uye zvinonamatira zvakakodzera hazvina kuwanikwa zvakanamatira pepa re polyethylene kumadziro emukati esimbi. Naizvozvo, kupfapfaidza murazvo kwakashandiswa kunyungudusa uye kupfekedza hupfu hwepolyethylene pamusoro pesimbi, nokudaro kuvhura kutanga kwependi yehupfu hwethermoplastic.

Kuputira mubhedha une fluidized , iyo iriyo nzira inonyanya kushandiswa uye yakajairika yekupenda pendi ye thermoplastic powder, yakatanga nenzira yekusasa zvakananga muna 1950. Munzira iyi, upfu hwe resin hunosaswa zvakaenzana pamusoro pechinhu chinodziya chebasa kuti hugadzire kuputira. Kuti nzira yekusasa iite otomatiki, nzira yekuisa mubhedha une fluidized yakaedzwa zvinobudirira muGermany muna 1952. Nzira yekuisa mubhedha une fluidized inoshandisa mweya kana gasi risina simba rinofuridzirwa muplate ine maburi pasi pemubhedha une fluidized kuti igadzire mhepo yakapararira yakapararira zvakaenzana, izvo zvinoita kuti upfu huri mumubhedha une fluidized huyerere kusvika padyo nemvura, kuitira kuti workpiece igone kugoverwa zvakaenzana pamusoro pebasa uye kuwana nzvimbo yakatsetseka uye yakati sandara.

Iwo Marudzi uye Zvakanakira uye Zvakaipa zveThermoplastic Powder Paint

Parizvino, pendi yethermoplastic powder inosanganisira mhando dzakasiyana-siyana dzakadai sepolyethylene/ polypropylene powder coatings, polyvinyl chloride powder coatings, nylon powder coatings, polytetrafluoroethylene powder coatings, uye thermoplastic polyester powder coatings. Dzave dzichishandiswa zvakanyanya mukudzivirira traffic, kudzivirira corrosion yemapaipi, uye zvinhu zvakasiyana-siyana zvemumba.

Polyethylene (PE) uye polypropylene (PP) poda coating

Polyethylene nepolypropylene zvaive zvimwe zvezvinhu zvekutanga zvakashandiswa mukupenda thermoplastic powder uye zvaive mapolymer maviri akakosha ethermoplastic muzana remakore rapfuura. Parizvino, polyethylene ine density yakakura neyakaderera yakashandiswa mumunda wethermoplastic. Polyethylene ine density yakawanda inowanzo shandiswa mumunda weindasitiri, nepo polyethylene ine density yakaderera ichi shandiswa mumunda wecivil.

Sezvo molecular cheni ye polyethylene uye polypropylene iri kabhoni-kabhoni bond, ese ane non-polar maitiro eolefins, saka polyethylene uye polypropylene poda coatings ane yakanaka makemikari kuramba uye anoshandiswa zvakanyanya mumunda weanti-corrosion. Iwo anoshandiswa kuchengetedza, kuchengeta, uye midziyo yekutakura, mapaipi, uye mapaipi emafuta emakemikari uye makemikari reagents. Sechinhu chisina simba, rudzi urwu rwepende yehupfu husina kunamatira kune substrate uye inoda kunyatsogadziriswa kwepamusoro kwe substrate, kana kushandiswa kweprimer kana kuchinjwa kwe polyethylene nezvimwe zvinhu.

Chazvakanakira 

Polyethylene resin ndiyo inonyanya kushandiswa uye inogadzirwa thermoplastic poda pendi.

Ine zvinotevera zvinotevera:

1. Yakanakisa kudzivirira kwemvura, asidhi uye alkali kuramba, uye makemikari kuramba;
2. Yakanaka magetsi ekudzivirira uye kupisa kwemafuta ekudzivirira;
3. Yakanakisa tensile simba, kuchinjika, uye kukanganisa kupikisa;
4. Yakanaka yakaderera-kupisa kupikisa, inogona kuchengetedza maawa 400 pasina kutsemuka pa -40 ℃;
5. Mutengo wakaenzana wezvigadzirwa zvakaderera, zvisina chepfu uye zvine hushamwari.

Kukanganisika

Nekudaro, nekuda kwezvimiro zve substrate polyethylene, polyethylene poda pendi zvakare ine zvimwe zvisingadzivirirwe zvinokanganisa:

1. Kuomarara, kupfeka kusamira, uye kusimba kwemichina yejasi ishoma;
2. Iko kusungirirwa kwekuputira kwakashata uye substrate inoda kunyatsogadziriswa;
3. Kusagadzikana kwemamiriro ekunze, kukonzeresa kunetseka kuputsika mushure mekusangana nemirairo ye ultraviolet;
4. Kusagadzikana kwepamusoro-tembiricha kuramba uye kushomeka kushomeka kune hunyoro hwekupisa.

Polyvinyl chloride (PVC) kupfekedza hupfu

Polyvinyl chloride (PVC) is amorphous polymer ine kadiki kasina kukwana makristasi. Zvizhinji PVC Zvigadzirwa zveresin zvine huremu hwemamorekuru pakati pe50,000 ne120,000. Kunyange zvazvo yakakwirira molecular uremu PVC resin ane zviri nani zvemuviri zvimiro, yakaderera molecular uremu PVC resin ane yakaderera melt viscosity uye kupfava tembiricha akakodzera zvakanyanya semidziyo ye thermoplastic poda pendi.

PVC pachayo chinhu chakaomarara uye haigone kushandiswa sehupfu pendi zvinhu chete. Paunenge uchigadzira machira, imwe chiyero cheplasticizer inoda kuwedzerwa kugadzirisa kuchinjika kwe PVC. Panguva imwecheteyo, kuwedzera plasticizers zvakare kunoderedza kusimba kwechinhu, modulus, uye kuoma. Kusarudza rudzi rwakakodzera uye huwandu hweplasticizer hunogona kuwana chiyero chinodiwa pakati pekushanduka kwezvinhu uye kuoma.

Kukwana PVC poda pendi formula, stabilizers zvakare chikamu chakakosha. Kugadzirisa kugadzikana kwekupisa kwe PVC, munyu wakavhenganiswa we calcium uye zinc ine kunaka kwekushisa kwekushisa, barium uye cadmium sipo, mercaptan tin, dibutyltin derivatives, epoxy compounds, nezvimwewo zvakagadzirwa. Kunyangwe lead stabilizers vane yakanakisa kugadzikana kwemafuta, ivo vakadzingwa kunze kwemusika nekuda kwezvikonzero zvezvakatipoteredza.

Parizvino, inonyanya kushandiswa zvigadzirwa zve PVC pendi yehupfu zvakasiyana midziyo yemumba uye racks yekuwachira. PVC zvigadzirwa zvine kushambidzika kwakanaka uye kushorwa nekusvibiswa kwekudya. Vanogonawo kuderedza ruzha rwemadhishi edhishi. Dish racks akaputirwa PVC zvigadzirwa hazvizoiti ruzha kana uchiisa tableware. PVC poda coatings inogona kuiswa ne fluidized bed kuvaka kana electrostatic spraying, asi ivo vanoda akasiyana hupfu particle saizi. Zvinofanira kucherechedzwawo kuti PVC pendi yehupfu inoburitsa kunhuhwirira kwakashata panguva yekunyudzwa yekunyudza uye inokuvadza kumuviri wemunhu. Kushandiswa kwavo kwakatotanga kurambidzwa kune dzimwe nyika.

Chazvakanakira

Zvakanakira zvepolyvinyl chloride poda pendi ndezvi:

1. Mitengo yakaderera yezvinhu;
2. Kuramba kusvibiswa kwakanaka, kusamira kwekugeza, uye kusagadzikana kwekuora;
3. High mechanical simba uye yakanaka magetsi ekudzivirira kushanda.

Kukanganisika

Izvo zvisingabatsiri zvepolyvinyl chloride poda pendi ndezvi:

1. Musiyano wetembiricha pakati petembiricha yekunyunguduka uye tembiricha yekuora ye PVC resin idiki. Panguva yekuputira, tembiricha inoda kunyatsodzorwa kudzivirira iyo yekupfeka kubva pakuora.
2. Iyo yekuputira haimirire kune anonhuwirira hydrocarbons, esters, ketoni, uye chlorinated solvents, nezvimwe.

Polyamide (nylon) poda coating

Polyamide resin, inowanzozivikanwa senaironi, inoshandiswa zvakanyanya thermoplastic resin. Nylon ine yakanakisa yakazara zvivakwa, kuomarara kwepamusoro, uye yakasarudzika kupfeka kuramba. Iwo anochinja uye akadzikama friction coefficients enylon coefficients madiki, uye ane lubricity. Naizvozvo, anoshandiswa mumachira emichina mabearings, magiya, mavharuvhu, etc. Nylon poda coatings ine lubricity yakanaka, yakaderera ruzha, yakanaka kuchinjika, yakanakisa adhesion, chemical resistance, uye solvent resistance. Inogona kushandiswa seyakanaka kusagadzika uye yekuzora coating kutsiva mhangura, aruminiyamu, cadmium, simbi, etc. Density yenaironi yekuputira firimu inongova 1/7 yemhangura, asi kusapfeka kwayo kunowedzera kasere kupfuura yemhangura.

Nylon poda yekupfeka haina chepfu, haina kunhuwa, uye haina kunaka. Mukubatana nenyaya yekuti havatambudzike kupindirwa nefungal kana kusimudzira kukura kwebhakitiriya, vanoiswa zvakabudirira kuindasitiri yekugadzira chikafu kuti vapfekedze michina yemuchina uye pombi masisitimu kana kupfeka nzvimbo dzinosangana zvakananga nechikafu. Nekuda kwekunaka kwayo kwemvura uye kudzivirira kwemvura yemunyu, inowanzo shandiswa kupfekedza muchina wekugeza zvikamu, nezvimwe.

Nzvimbo yakakosha yekushandiswa kweiyo nylon poda yehupfu ndeyekupfekedza marudzi akasiyana-siyana ezvibato, kwete chete nokuti vane zvinhu zvakakosha zvakadai sekupfeka kusagadzikana uye scratch resistance, asiwo nokuti kuderera kwavo kwekushisa kwekushisa kunoita kuti zvibato zvinzwe zvinyoro. Izvi zvinoita kuti zvinhu izvi zvinyatsokodzera kupfekedza zvibato zvekushandisa, zvibato zvegonhi, uye mavhiri.

Kuenzaniswa nemamwe mapeji, mafirimu ekuputira naironi ane kushomeka kwemakemikari uye haana kukodzera kushandiswa munzvimbo dzemakemikari senge acids uye alkalis. Naizvozvo, mamwe epoxy resins anowanzo kuwedzerwa semadhizaini, ayo asingangogone kuvandudza kushora kwenaironi machira asi zvakare kunatsiridza kusimba kwekubatanidza pakati peiyo firimu yekuputira nesimbi substrate. Nylon poda ine yakakwira yekunyudza mvura uye inotapukirwa nekunyorova panguva yekuvaka nekuchengetedza. Nokudaro, inoda kuchengetwa pasi pemamiriro akavharwa uye haifaniri kushandiswa kwenguva yakareba pasi pemvura uye inopisa. Chimwe chinhu chekucherechedza ndechokuti nguva yepurasitiki yehupfu hwenaironi ipfupi, uye kunyange firimu rekuputira risingadi plasticizing rinogona kuzadzisa zvinodiwa, iyo yakasiyana-siyana yehupfu hwenylon.

Polyvinylidine fluoride (PVDF) pendi yehupfu

Iyo inomiririrwa nemamiriro ekunze-inodzivirira coating mu thermoplastic poda pendi ndeye polyvinylidene fluoride (PVDF) poda coating. Seyakanyanya kumiririra mamiriro ekunze-inodzivirira ethylene polymer, PVDF ine yakanaka mechanic uye inopikisa kuramba, kupfeka kwakanakisa kusamira, kuchinjika kwakatanhamara uye kuoma, uye inogona kuramba makemikari anoparadza akawanda seasidhi, alkali, uye maoxidants akasimba. Zvakare, hainyungudike mumakemikari zvinonyungudutsa anowanzo shandiswa muindasitiri yekukoira, izvo zvinokonzerwa neFC mabhondi ari muPVDF. Panguva imwecheteyo, PVDF inosanganawo nezvinodiwa neFDA uye inogona kushandiswa mukugadzira chikafu uye inogona kusangana nechikafu.

Nekuda kwekukwirira kwayo kunyungudika, PVDF inogara kune pinholes uye isina kusimba simbi inonamira mune yakaonda firimu coating, uye mutengo wezvinhu wakanyanya kukwirira. Naizvozvo, kazhinji, haishandiswe sechinhu chega chega chekugadzira poda. Kazhinji, inenge 30% ye acrylic resin inowedzerwa kuvandudza zvinhu izvi. Kana zvinyorwa zve acrylic resin zvakanyanyisa, zvinokanganisa kupikisa kwemamiriro ekunze kwefirimu yekuputira.

Kupenya kwePVDF yekuputira firimu kwakadzikira, kazhinji kutenderera 30±5%, iyo inomisa kushandiswa kwayo mukushongedza kwepasi. Parizvino, inonyanya kushandiswa sechivharo chechivako chezvivakwa zvakakura, chinoiswa padenga mapaneru, madziro, uye extruded aruminiyamu mahwindo emahwindo, ane yakanyanyisa kunaka kwemamiriro ekunze.

Shandisa Vhidhiyo

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