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Paint & powder coat stripping showcase

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Notes & photos on proprietary products & processes. Silicon carbide powder, fluidised bed paint stripping, paint strippers, blast cabinets, hot stripping, in-line stripping, plastic blast media, fluidised sand stripper.

Paint & powder coating - transfer efficiency is route to compliance

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Extols commercial gun which claims high transfer efficiency without detriment to finish quality.

Paint & powder coating buyers’ Guide

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50 page directory of companies and their profiles, product index, products and services, addresses and Associations and Institutes.

Paint & powder coating features

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Visit to German jobbing coater where hot-dip galvanising & powder coating are available to provide duplex coatings. Research project at Fraunhofer IPA for electrostatic powder coating not using spray gun but fluidised bed. High voltage pulses avoid low coverages at corners & edges, as cross-section photo shows. Low energy consumption & small footprint are among benefits. 7 partners are listed for this project, with the contribution made by each. Visit to German fully-automated paint line for automotive brake disks. Plant parameters are shown. Visit to new German cathodic electrocoat line for agricultural machinery. Comment on infra-red drying of painted work, where lower energy costs are reported. Graph shows much greater heat transfer for radiative, as opposed to convective heat. Temperature-time plots for both approaches are compared. Photos show typical installations. New job software for paintshops, prints out job number & full details etc. A new high-gloss paint for ABS plastic. Photos show coating adhesion by cross-hatch test for 2 ABS samples, one with good, one with poor adhesion. Corrosion-protection for steelwork of world's largest covered ship dock, 500 metres long, 75 m high in Germany where a high-solids paint was used.. Pie chart shows how, from 2007 to 2008, German paint market statistics have changed with continuing move away from solvent-based to low-solvent types.

Paint & Powder coating features

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Case study: painting automotive alloy wheels, switch to water-based. Performance of water-based painted wheels with clearcoat is tabulated in terms of property, test used & outcome. Histos show huge decrease in solvent use. A new development is hydro matt clearcoat.. Painting of polypropylene plastics. Good adhesion is obtained with new polarisable paint & primer. Photos show examples of work. www.polysil.de. Visit to German refrigerator mfr where new powder coat line has increased capacity by 60%. www.itwgema.ch

Paint & Powder coating features

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Visit to new German powder coating installation, for which rapid colour change, ergonomic design and effective powder handling & top-up are claimed. New antimicrobial (bactericidal) powder coating with claimed 10 year biocidal lifetime. Photos show Petri dishes after various times. Details of its efficacy and broad-spectrum attack, no details as to composition, but has been patented, possibly by Dr Franco Martinazzo. www.stpowdercoatings.com BASF showcases its range of powder coatings for coil coatings for architectural use. Chart shows weathering and other properties for various different grades of topcoat.

Paint & powder coating features

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Better surface finishes achieved using in-mould coating. A note describes this process. www.adaptacolor.com. Report on a new paint spray booth with reduced footprint, intelligent operation bringing savings of cost and materials. www.dete.de

Paint & Powder coating notes

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Comments on powder coating developments incl. dominance of hybrid powders in Europe, and binders for these; advances in powder coating od heat-sensitive materials, new powder systems for UV curing, prospects for polyurethane powders, and the range of surfaces from matt to easy-clean. Also summary of pretreatment & powder coating seminar in Luebeck,

Paint & powder coating notes

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Visit to Messrs Trump machinery manufacturers where components are assembled some already painted or coated, others to be coated and colour matching is critical. The so-called "Free-painting" method is described and comments on choice of pigments etc. Rapid colour changeover in powder coating, ITW system is described

Paint & powder coating notes

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Items on jobbing powder coater expanding to accept larger items. New project for powder coating heat-sensitive substrates such as architectural claddings. Lower curing temperatures reduced rejects, mainly due to deformation (curvature). Chart shows the 12 or so key properties compared with prev. used powder. Time-temperature curing profiles are shown as are oven-tracking plots. Detailed meas'ts of curvature incidence are listed. Exploiting nano-structure paints. General comments on nano-particle loaded paints, report on projects a) scrtach-resistant coating for spectacle lenses b) wear-resistant coatings for brass architectural fittings, by sol-gel process. Adhesion to substrate is maintained with age. Photos show accelerated corrosion tests of sol-gel coated sheets. Powder coating slurry - coating with zero emissions. The process is explained, plant and typical items coated are shown. Even plants which converted from wet paint to powder, might now change to slurry powder. Plant & process sequences are shown.

Paint & powder coating ovens

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Advice on maintaining ovens and recording their performance, incl. smoke bombs and temperature profilers and temperature tracking graphs. Notes that some oven air seals have different characteristics at rom temperature and operating temperature, which should be taken into account. Oven profile graphs are shown with interpretatative comments.

Paint & powder coating plant

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Visit to various plants incl. BMW Dingolfing where DDF (digital powder processing) plant is detailed with flowsheet and sketch of digital pump. Histos compare costs of 2-pack wet paint & powder, and technological comparisons are also shown. Powder offers lowest costs. Additional interview amplifies these points, suggests powder costs are 50% those of wet paint. Second interview discusses BMW philosophy and their negative view of powder fillers. Visit to Daimler Chrysler Sprinter van plant and paintshop. Report on joint project for UV-cure clearcoat, with test results on chemical resistance and damage in car wash plants. Special computer software for simulation of the UV cure process is described. 3D graph plots wavelength vs. energy flux and time. New colour change unit, where previously used colour is returned, under nitrogen pressure, to reservoir. Process flowsheet is shown..

Paint & Powder coating stripping showcase

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Photos & notes on proprietary blast wheel, heavy-duty stripper, blast cabinet, rotary stripping system, heat (pyrolysis) oven, multi-metal strippers, cold strippers

Paint & powder curing & drying

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Controlling temperature in curing oven and alarms of defective operation. Use of a computer spreadsheet is shown, to avoid over-curing and to predict minimum heating times which spreadsheet then displays. Graphs show temperature-time plots. Feature describes how temperature datalogger & associated software can be used to reconfigure oven profiles for individual jobs, e.g a bicycle frame. Table et out "Cure Index" and the paint-specific procedure for creating & calibrating this.

Paint & powder equipment

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Features on paint handling pumps; masking caps & sleeves to protect screw threads during painting;