Tar \u00e9is n\u00edos m\u00f3 n\u00e1 c\u00faig bliana is fiche ag re\u00e1cht\u00e1il triail scaipthe agus ag r\u00e9iteach fadhbanna le baisceanna t\u00e1irgthe, t\u00e1 s\u00e9 foghlamtha agam go socra\u00edtear c\u00e1il\u00edocht an bhrataithe deiridh go minic laistigh den ch\u00e9ad tr\u00edocha n\u00f3im\u00e9ad den mhionlach. Mura scaiptear na dath\u00e1in agus na l\u00edont\u00e1in i gceart \u00f3n t\u00fas, is f\u00e9idir leat an chuid eile den l\u00e1 a chaitheamh ag iarraidh r\u00e9iteach a fh\u00e1il ar bhuanna m\u00f3r sa mh\u00e9athacht, ar fhorbairt dhath\u00e1in lag, n\u00f3 ar shu\u00ed sa bhuid\u00e9al. Sin an \u00e1it a dtagann gn\u00edomhair\u00ed scaipthe chun tairbhe. N\u00ed hamh\u00e1in go gcuireann siad ar chumas na l\u00edocha taise a ghlacadh n\u00edos tap\u00fala \u2014 coinn\u00edonn siad na c\u00e1ithn\u00edn\u00ed scartha \u00f3na ch\u00e9ile ionas go bhfanann an c\u00f3ras ioml\u00e1n cobhsa\u00ed le linn an t\u00e1irgthe, an st\u00f3r\u00e1la, agus an fheidhmithe.<\/p>\n
<\/p>\n
Oibr\u00edonn gn\u00edomhaire scaipthe tr\u00ed ions\u00fa a dh\u00e9anamh ar dhromchla an l\u00edoidh agus bac a chruth\u00fa a choisceann ath-chomhcheangal. I gc\u00f3rais uisce-bhunaithe, is minic gur di\u00falt\u00fa leictreastatach \u00f3 ghr\u00fapa\u00ed luchtaithe a bh\u00edonn i gceist (cos\u00fail le carbocsail\u00e1it\u00ed ar pholaacril\u00e1it\u00ed). I gc\u00f3rais tholaigh n\u00f3 i gc\u00f3rais ard-soladach, is gn\u00e1ch go mb\u00edonn bac staireach \u00f3 shlabhra\u00ed polaim\u00e9ire fada n\u00edos t\u00e1bhachta\u00ed. Comhcheangla\u00edonn roinnt scaipthe\u00e1n polaim\u00e9ireach nua-aimseartha an d\u00e1 mheicn\u00edocht. Is iad na tortha\u00ed n\u00e1 slaodacht n\u00edos \u00edsle ag ualach pigment n\u00edos airde, amanna meilte n\u00edos tap\u00fala, neart datha n\u00edos fearr, agus n\u00edos l\u00fa socraithe le himeacht ama.<\/p>\n
Is cuimhin liom go f\u00f3ill tionscadal p\u00e9inte\u00e1la ailtireachta uisce-iompartha amh\u00e1in inar th\u00e1inig difr\u00edocht shuntasach chun solais. Bh\u00edomar ag scaipeadh ti\u00fabharailt chaighde\u00e1nach TiO\u2082 (20 % PVC) m\u00f3ide l\u00ed org\u00e1nach dearg i gc\u00f3ras eiblithe aicrileach. Gan aon scaipthe\u00e1n, d'ardaigh slaodacht an bhoinn mheilte os cionn 8000 mPa\u00b7s laistigh de dheich n\u00f3im\u00e9ad de scaipeadh ardluais, n\u00edor th\u00e1inig meilt Hegman faoi bhun 4 riamh, agus tar \u00e9is tr\u00ed l\u00e1 thosaigh an l\u00ed dearg ag sn\u00e1mh agus ag flocas\u00fa. Bh\u00ed neart an datha thart ar 15 % n\u00edos \u00edsle n\u00e1 an sprioc, agus n\u00ed raibh an gile ag 60\u00b0 ar an scann\u00e1n triomaithe ach 42 aonad.<\/p>\n
Ansin, rinneamar an fhoirmi\u00fa c\u00e9anna a rith le tr\u00ed ghn\u00edomhaire scaipthe \u00e9ags\u00fala ag 1.2 % gn\u00edomhach ar mhe\u00e1chan an l\u00edocha:<\/p>\n
Ba \u00e9 an leagan poli\u00faireat\u00e1in a bhuaigh an obair sin toisc gur thug s\u00e9 an chothroma\u00edocht is fearr idir \u00edseal-ghreamaitheacht, scaipeadh tapa, agus cobhsa\u00edocht fhadt\u00e9armach gan fo-iarsma\u00ed ar an scann\u00e1n. Sa deireadh, d'\u00fas\u00e1ideamar \u00e9 ag 0.9 % gn\u00edomhach tar \u00e9is an cuar d\u00e1ileog a optam\u00fa. Thug an mhonarcha faoi deara freisin go bhf\u00e9adfaid\u00eds an l\u00f3d\u00e1il TiO\u2082 a ard\u00fa faoi 8 % gan fadhbanna le slaodacht, rud a chuir feabhas ar an gcumhdach agus a laghdaigh costas ioml\u00e1n an fhoirmlithe.<\/p>\n
Mh\u00fain an triail sin roinnt ceachtanna praitici\u00fala dom. Ar an gc\u00e9ad dul s\u00edos, t\u00e1 n\u00edos m\u00f3 t\u00e1bhachta le d\u00e1ileog n\u00e1 mar a mheasann an chuid is m\u00f3 de dhaoine. M\u00e1 bh\u00edonn an iomarca beag ann, tarla\u00edonn flocad\u00fa n\u00edos d\u00e9ana\u00ed; m\u00e1 bh\u00edonn an iomarca ann, is f\u00e9idir leat an slaodacht a mh\u00e9ad\u00fa ar\u00eds n\u00f3 dochar a dh\u00e9anamh do fhriota\u00edocht in aghaidh uisce. Bainim \u00fas\u00e1id i gc\u00f3na\u00ed as sraith dh\u00e1ileog \u00f3 0.5 % go 2.5 % de ghn\u00edomhaire gn\u00edomhach ar an l\u00edocht agus breathna\u00edm ar an gcuar meilte agus ar an gcobhsa\u00edocht st\u00f3r\u00e1la araon.<\/p>\n
Ar an dara dul s\u00edos, caithfidh an cheimic a bheith oiri\u00fanach don ch\u00f3ras. B\u00edonn polaiacr\u00e1it\u00ed saor agus \u00e9ifeachtach i go leor p\u00e9inteanna maisi\u00fala uisce-bhunaithe, ach is f\u00e9idir leo a bheith \u00edogair i leith leictreaph\u00e1irteanna agus athraithe sa pH. Cosna\u00edonn scaipthe\u00e1in pholaim\u00e9ireacha (cine\u00e1lacha poli\u00faireat\u00e1in n\u00f3 polaeitear) n\u00edos m\u00f3 ach tugann siad feidhm\u00edocht n\u00edos fearr le dath\u00e1in org\u00e1nacha deacra agus i gc\u00f3rais a dteasta\u00edonn ard-snasta n\u00f3 marthanacht mhaith sheachtrach uathu. I gc\u00e1s alcaid\u00ed n\u00f3 eapocsa\u00ed tuaslag\u00e1nbhunaithe, is minice a roghna\u00edm f\u00f3s cine\u00e1lacha aig\u00e9id shailleacha n\u00f3 aicrileach mhodhnaithe.<\/p>\n
Sa tr\u00ed\u00fa h\u00e1it, n\u00ed h\u00e9 an saothar tosaigh amh\u00e1in an f\u00edor-th\u00e1st\u00e1il riamh. D\u00e9anaim seice\u00e1il ar an slaodacht i gc\u00f3na\u00ed tar \u00e9is 24 uair an chloig agus tar \u00e9is seachtaine, d\u00e9anaim t\u00e1st\u00e1il cuimilte chun glacadh an datha a mheas, agus d\u00e9anaim st\u00f3r\u00e1il luathaithe (50 \u00b0C ar feadh coic\u00edse) chun a fheice\u00e1il an dtarla\u00edonn flocl\u00fa n\u00f3 tuilte. Theipeann ar go leor baisceanna saotharlainne \u201cmhaith\u201d ag an bpointe seo.<\/p>\n
De r\u00e9ir taith\u00ed, is amhlaidh is m\u00f3 a bh\u00edonn na gn\u00f3thachain le feice\u00e1il nuair a bh\u00edonn t\u00fa ag m\u00e9ad\u00fa ualach an l\u00edoige n\u00f3 ag obair le l\u00edocha at\u00e1 deacair a scaipeadh, cos\u00fail le ftalaiciana\u00edn\u00ed \u00e1irithe n\u00f3 dubha carb\u00f3in. I dtionscadal d\u00faigh amh\u00e1in, lig athr\u00fa go scaipthe\u00e1n polaim\u00e9ireach saincheaptha d\u00fainn an l\u00f3d\u00e1il dubh charb\u00f3in a mh\u00e9ad\u00fa \u00f3 12 % go 18 % agus an slaodacht \u00e1 coinne\u00e1il faoi bhun 1500 mPa\u00b7s. Chuir an t-athr\u00fa aonair sin feabhas ar an ng\u00e9ireacht agus laghdaigh s\u00e9 l\u00edon na dtr\u00e1thanna sa mhuileann coirn\u00edn\u00ed \u00f3 cheithre go dh\u00e1 cheann.<\/p>\n
Ar nd\u00f3igh, n\u00ed leigheas uil\u00edoch iad gn\u00edomhair\u00ed scaipthe. N\u00ed shocr\u00f3idh siad droch-chaighde\u00e1n l\u00edocha, me\u00e1in mhuilinn mh\u00edchearta, n\u00e1 srianadh neamhdh\u00f3thanach. M\u00e9ada\u00edonn siad an costas freisin agus uaireanta is f\u00e9idir leo tionchar a imirt ar air\u00edonna eile \u2014 c\u00far, frithsheasmhacht in aghaidh uisce, n\u00f3 gream\u00fa idirch\u00f3ta\u00ed m\u00e1 roghna\u00edtear an cine\u00e1l m\u00edcheart.<\/p>\n
I ndeireadh na d\u00e1la, t\u00e1 an t-\u00e1bhar scaipthe ceart f\u00f3s ar cheann de na cinnt\u00ed is m\u00f3 tionchair a dh\u00e9anann t\u00fa i bhfoirmle. Nuair a oibr\u00edonn s\u00e9, faigheann t\u00fa t\u00e1irgeadh n\u00edos tap\u00fala, baist\u00ed n\u00edos comhsheasmha\u00ed, dath n\u00edos fearr, agus n\u00edos l\u00fa gear\u00e1n \u00f3 chustaim\u00e9ir\u00ed. Nuair nach n-oibr\u00edonn s\u00e9, b\u00edonn t\u00fa ag streachailt le bun\u00fas na meilte gach l\u00e1. Is iad na monarchana a thugann caitheamh d\u00e1ir\u00edre do roghn\u00fa scaipthe\u00e1in mar obair fhoirmlithe \u2014 tr\u00ed thriail chompar\u00e1ide chu\u00ed a re\u00e1cht\u00e1il agus m\u00e9id a tharla\u00edonn i nd\u00e1ir\u00edre tar \u00e9is st\u00f3r\u00e1la agus feidhme a thomhas \u2014 is iad sin na monarchana a stopann ag streachailt le fadhbanna agus a thosa\u00edonn ag bualadh spriocanna go seasta.<\/p>","protected":false},"excerpt":{"rendered":"
After more than twenty-five years running dispersion trials and troubleshooting production batches, I\u2019ve learned that the quality of the final coating often gets decided in the first thirty minutes of the millbase. If the pigments and fillers don\u2019t disperse properly right from the start, you can spend the rest of the day chasing viscosity spikes, […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_seopress_robots_primary_cat":"none","_seopress_titles_title":"","_seopress_titles_desc":"","_seopress_robots_index":"","footnotes":""},"categories":[3],"tags":[],"class_list":["post-60","post","type-post","status-publish","format-standard","hentry","category-news"],"_links":{"self":[{"href":"https:\/\/dispersingagent.net\/ga\/wp-json\/wp\/v2\/posts\/60","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/dispersingagent.net\/ga\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/dispersingagent.net\/ga\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/dispersingagent.net\/ga\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/dispersingagent.net\/ga\/wp-json\/wp\/v2\/comments?post=60"}],"version-history":[{"count":2,"href":"https:\/\/dispersingagent.net\/ga\/wp-json\/wp\/v2\/posts\/60\/revisions"}],"predecessor-version":[{"id":64,"href":"https:\/\/dispersingagent.net\/ga\/wp-json\/wp\/v2\/posts\/60\/revisions\/64"}],"wp:attachment":[{"href":"https:\/\/dispersingagent.net\/ga\/wp-json\/wp\/v2\/media?parent=60"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/dispersingagent.net\/ga\/wp-json\/wp\/v2\/categories?post=60"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/dispersingagent.net\/ga\/wp-json\/wp\/v2\/tags?post=60"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}