Foreword: Construction machinery excavators–leaving the factory–must–face–wind blowing–sun–rain–dripping–ultimate–test
The coating of construction machinery (excavator/loader/crane) faces three contradictory requirements:(1) thick film (one piece>80-120μm excavator–one day–shovel-stone–coating–thin–thin–cut–=-half a day–grind–wear);(2) fast drying (–5–10 years–no-powder–turn–no–lose–light) thick–dry–fast–dry–=-thin-weather resistance–=-expensive-triangle-contradictory engineering–machinery–formulation of paint–art-= between-three-vertices–find the–best-balance–point.
Engineering machinery coating is an industrial coating system with triple needs of high solids acrylic polyurethane (hydroxyacrylic acid +HDI biuret/trimer-solids>65%-VOC 1000h/outdoor>5-10 years)-typical construction: primer + topcoat wet on wet 60-80°C/30-40min-one bake-maximizing production line efficiency.
FAQ
Q1: Engineering machinery coating wet touch wet primer + topcoat-only baked once-why saves time but is risky?&#”” 8220; Wet touch wet primer is finished-flash dry for 5 – 10 minutes (Dry surface-not-completely-cured)–immediately-spray–top coat bottom–+–surface–into oven once–(60—80 °C–/–3–0—40–min)–Save—One step–Baking–Baking–Save–Energy–40%–+-Save—>–3–0–min-Production–Time But Risk: Surface–Paint–Solvent–Will–Seep–Inject–Not–Solid—Transformation–Bottom–Paint–Agent–Trap–On–Bottom–Layer Bake–Bake–Time—Blast–Soak Must–(1)–Bottom–Paint—Quick-Dry–Formula (Solvent volatilize–fast–/-flash–dry–5min–i.e. –surface–dry);(2)–surface–lacquer–solvent–weak–dissolvable–bottom–lacquer (alcohol–/-ester–mixing–ratio–accurate)–.””””””””
Q2: Construction machinery-why not use powder coatings-isn’t it zero VOC? Powder coating–curing–temperature–>–1–6–0—-200 ° C engineering–mechanical–>-count–tons–weight–steel–structure–=-heat–capacity–volume–huge–baking–heating–to–200 ° C–Need–>–2 – 3h energy consumption–Amazing-+-Powder–Unable to–Repair–(On-site-knock–touch–repair–repair) Liquid–body coating–(propylene–acid—PU)–60 – 80 °C–/30–min–fast–dry—+-On-site–can–repair–repair =–engineering–mechanical—first choice.
summary
Engineering machinery coatings–thick film/quick-drying/weatherproof triangle balance–acrylic PU(high solid content/wet on wet/60-80°C baking)–the best cost performance. Kexin New Materials provides engineering machinery coating products and construction process support so that the digging machine can be delivered from the factory to meet any weather challenges.