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Infrared Heat for Coatings

Every coating process is different but all processes share the common requirements of the highest possible quality

Plastic Effective and fast drying process

and the fastest possible drying of the coating. With standard heat sources this is often no longer possible.

In the drying of coatings it has already been proven, that infrared radiation can penetrate to the required depth in the coating system and to dry the coating film from inside outwards. Skin- or blister-formation on the surface is prevented and drying of the coating is 足speeded up. The result is a brilliant surface quality that meets specification.

Infrared energy, which is matched 足precisely with the product and coating, is quickly converted into heat, water or other solvents are evaporated, while the 足material and the local environment remain cool.

Modern cars, computers and electronic equipment contain many plastic components. Gear sticks, keyboards and touch pads are printed and coated with a protective lacquer or metallised coating. An increase in the production speed can be achieved by the use of infrared. Infrared transfers large amounts of energy in a very short time, significantly reducing drying times. In addition, an infrared system helps to save energy, as unlike a conventional oven, it can be switched on immediately when heat is required.

Foto: Honda

PVC-coated laminate

Protective lacquer on keyboards

Foto: Cherry

Foil coating

Foto: Kestrel

Foto: API foils

Bitumen on membrane

Foto: Cova

Foto: Anderson

Water-based coating on car bumpers

PET coating

Metals Brilliant Surface Quality through the best matching

Coating of saw blades

Another measure is to increase the power of the existing oven. This is where infrared technology offers a real alternative, with high power infrared emitters and systems, which can be easily accommodated into existing plant because of their compact design.

Foto: Hawes Signs

In drying coated components, production bottlenecks are often created. The existing drying ovens can be extended to increase the production speed, so that the components can be passed through more quickly. However, this solution is often precluded because of space considerations.

Protective coating on signs

Coating of tubes

Foto: SSK

Metal finish coating

Foto: Chesterfield Cylinders

Booster Production bottlenecks often occur as a result of tougher production demands, where the existing drying system can no longer keep pace. This can often be solved by an infrared booster section, which is positioned in front of the existing drying system. The booster section rapidly brings the product up to temperature allowing line speeds to be increased accordingly.

Coating on 3-D cylinders

Coating of compressor housings

Foto: Piesslinger

Foto: Weisstechnik

For some products this can equate to savings of up to 50 % of the time required to dry or cure the coating.

Aluminium profiles

With no air circulation dust inclusions are removed and quality problems arising from powder being “blown” of the surface of the part are eliminated. Rapid melting of the powder improves the quality of finish and allows line speed to be increased.

Foto: SAS

Powder Coatings Infrared heating technology can significantly speed up the melting of powder coatings. Powder is a very good absorber of infrared energy which allows the powder to flow or cure in times that are significantly shorter than with conventional ovens.

Coil coating

Paper Effective Radiation with high surface power density

We come across paper every day. Newspapers, mail shots and serviettes as well as wallpapers and filters are manufactured from paper which are then printed or coated as required. With the correct selection of infrared emitters, coatings on paper can be dried in a targeted manner so that sensitive paper products suffer no heat damage.

Water-based Coatings – the right wavelength It is important to match the infrared emitter to the absorption characteristics of the coating or substrate being dried. Water absorbs energy predominantly in the medium wave (2–4 microns) portion of the infrared spectrum. In com­ parison short wave or near infrared energy (0.7–2 microns) has a much lower efficiency resulting in more energy being used to achieve the same level of drying.

Personalised mailings

Foto: Abbey

Mail shots can be personalized using either laser- or ink-jet printers. These inks are completely dried by carbon emitters before the letters, prospectuses or publicity material is cut, folded or glued, according to the specific requirements.

Foto: Lettershop

During the production of tray mats for aircrafts a high quality non-slip coating is applied and dried using Carbon medium wave infrared.

Adhesives on printed products

All Carbon infrared emitters CIR® combine effective medium wave radiation with high surface power density and accelerate the efficient drying of water-based paints, inks and coatings.

Foto: Newmoor

Comprehensive tests have shown that carbon emitters dry water-soluble coatings significantly more efficiently than short wave or near infrared emitter. A carbon infrared emitter uses up to 30 % less energy for the same drying process compared to conventional short wave or near infrared emitters. Wallpapers with a polyvinyl coating

Foto: Orvec Foto: Locker

Anti-slip coating on paper mats

Foto: Manchester Print

Paper filters

Drying adhesive

Coating of paper used in food packaging

Textiles Modern Production to the Highest Quality

Today’s textiles for sport or for working clothes often feature water-repellent and breathable coatings. These coatings need to be dried quickly. High quality technical textiles must be perfectly fixed. Other fabrics are laminated, embossed or formed to suit the requirements of the customer. Infrared heat helps to modernise production and improve quality. Medium wave infrared energy can heat up water faster than the fabric, preventing damage to the substrate. Carbon infrared systems can also be fitted in front of Stenters to achieve the required degree of pre-drying. The very fast response of carbon emitters also ensures that there is no damage to the coated fabric in the event of a sudden machine stoppage. The use of these optimized fabric drying techniques reduce reject rates and increase production speeds.

Water-repellent coating on materials for outdoor clothing

Foto: Wilton Foto: Airbag International

Latex on carpet

Airbags for vehicles

Foto: Living Connections

Needle-punched materials – Powder coating

Venetian blinds

Cloth-Coating with neoprene and silicon

Foto: Federal Mogul

Ceramics and Glass Effective and energy-saving in the process

Protective coating on brake pads

Foto: Weisstechnik

Glass is coated for many different applications. Screen printing on car windscreens, powder coatings on champagne bottles, dirt-repellent coatings on shower cabinets or mirrors – infrared heat dries and cures. Heraeus Infrared can be perfectly matched with the specific process.

Foto: Redland

Screen printing on car windscreens

Protective coating on roof tiles

Foto: Pilkington

Coating bottles

Glass coating


Special Applications

Wood is treated with a wide range of coatings. Undercoats, lacquers or powders need to be dried as quickly as possible without detriment to the wood. Powder coating on mdf (medium density fibre boards) sheets must be gelled very quickly while the sheets of compressed wood should remain as cool as possible.

Infrared heat makes many industrial processes more efficient and reliable. In addition to the applications already demonstrated in this brochure, there are many more, including:

Adhesive on chipboard

• • • • • •

Foto: Saunderson Furnitur

• • •

Furniture panels

Foto: R-Tek

Infrared heat dries much faster than conventional methods. Radiation, which is precisely matched to the coating, is quickly converted into heat. The material and the surroundings remain cool. As a result, better quality of product is achieved, and the wood is made available for further processing more quickly, leading to savings in time and money.

Foto: MFI

Wood Fast and sensitive processing

Activating adhesive on plywood and particle wood materials

Drying of flux coatings on radiators Drying of coatings on engine blocks Drying of book-binding adhesives Drying of water-based adhesives on cigarette papers Drying of slab coatings Drying of stone chip protective coatings on car components Activating of glues and adhesives Drying of adhesives on chipboard Curing of powder coatings on mdf sheets

Could infrared help to make your process better? Talk to us! Our thanks for the information and photographic material to: • Abbey/UK • Airbag International/UK • Anderson/UK • API Foils/UK British Steel/UK • Carnaud/UK Cherry Electrical Products/UK Chesterfield Cylinders/UK Cova Products/UK • Hawes Signs/UK Honda/UK • Kestrel/UK • Klinger/UK Living Connections/UK • Locker Filtration/UK • Manchester Print/UK MFI/UK • Newmoor/UK • Orvec International/UK • Piesslinger/Austria Pilkington/UK • Redland Tiles/UK R-Tek/UK • Saunderson Furniture/UK SAS/UK • SSK/UK • The Lettershop Group/UK • Weisstechnik/Belgium Wilton/UK



Great Britain


Heraeus Noblelight GmbH

Heraeus Noblelight Ltd.

Heraeus Noblelight

Reinhard-Heraeus-Ring 7

Unit 1 Millennium Court

12, av. du Québec – Bât I 2

63801 Kleinostheim

Clayhill Industrial Estate

B.P. 630 Villebon

Phone +49 (6181) 35-8545

Buildwas Road

91945 Courtaboeuf Cedex


Neston, Cheshire CH64 3UZ

Phone +33 (169) 18 48 36

Phone +44 (151) 353 2710



+49 (6181) 35-168410

+44 (151) 353 2719

+33 (169) 28 82 43 USA



Heraeus Noblelight LLC

Heraeus Amba Australia Pty.Ltd.

Heraeus Noblelight (Shenyang). Ltd.

2150 Northmont Parkway, Suite L

Office Sydney 4 Vera St

4F, 11th Building,

Duluth, GA 30096

2508 Helensburg NSW

No. 99 Tianzhou Rd.,

Phone +1 (770) 418-0707


Shanghai, 200233


Telefon +86 (21) 5445 2255

Telefax +86 (21) 5445 2410

+1 (770) 418-0688

+61 (2) 4294 4682

We reserve the right to change the pictures and technical data of this brochure.

0208 HNG-B 57 E 5C

Ir for coatings  
Ir for coatings