EXCIMER MATTING TECHNOLOGY

A new “sustainable” machine even for 3D surface. Patent pending

As the market turns its attention more and more toward sensory aspects such as soft-touch finishes or toward long-term scratch and abrasion resistance, manufacturers of cabinet doors and objects with a 3D surface geometry and raised panels in general, are in need of a solution which reaches all sides and edges of their product. An excimer oven capable of handling more than just a flat panel.

Conventional excimer ovens handle flat panels which undergo a short-wave UV polymerisation process in an oxygen-free atmosphere. Excimer matting technology delivers high-performance surfaces with a soft-touch effect. The lacquer is cured in such a way as to produce an extremely matt finish as low as 5 gloss. Plus, it achieves that sought-after, lasting anti-fingerprint effect.

Exydry-Z does all this and more. It does it on 3D objects, so the edges of the cabinet door are as matt and as resistant as the surface. Developed in-house, this innovative excimer oven goes a step further. The matt finish, achieved by treating the surface prior to complete cross-linking, comfortably goes below 5 gloss on a scale going from 0 to 100. The surface resistance of the panels treated and dried in Exydry-Z is extremely high, despite reaching such low gloss levels.

And we’ve made it sustainable. The nitrogen used to wash away all the oxygen from the X, Y and Z axes of a raised panel, enabling matting on all surfaces, is substantially lower than conventional excimer ovens.

Boasting three patent pending technologies, this innovative system handles, for example, cabinet doors up to 25 mm thick sprayed using oscillating machines. The design enables a continuous flow of raised panels through the oven, taking care of full oxygen removal without stopping production. Whereas the key benefits are those connected to the increased quality of the finish and the ability to achieve it on 3D objects, production costs are reduced by a rationalisation of nitrogen consumption.

 

Would you like to have more information?
Excimer technology

Excimer technology adopts a short-wave UV polymerisation process performed in an oxygen-free atmosphere.

Exydry-Z

Exydry-Z employs excimer matting technology to obtain soft-touch, resistant surfaces with a lasting fingerprint-proof effect and deep matt finish, also on raised panels meaning also the edges of cabinet doors.

UV-R

UV-R is a UV radiation curing oven which combines all parts of the process in a single module: conveyor, UV unit and control panel.

Frequently Asked Questions

Which coated materials need drying?

All coated materials need drying. The type, duration and method of drying differ according to the nature and quantity of the applied lacquer.

How many and what types of drying are there?

Mainly two categories: physical and chemical drying. The former is based on hot air, air flow speed and time, while the latter requires a source (typically lamps) to activate some internal components in the lacquer. There are also lacquers that need both of these methods.

What types of oven are there?

There are different types of oven: in-line, vertical and UV. The first two will dry items through a physical process and differ by size, working speed and hold times of the workpieces. UV ovens, on the other hand, are based on a chemical process and their size is smaller. The choice of an oven is determined by the type of lacquer used.

How do I decide which drying technique is the most suitable?

The recommended type of drying depends on the type of product and is normally defined in agreement with the lacquer manufacturer, to ensure the required coating performance over time. The coating cycle, which also includes drying, is then defined with the aim of obtaining the desired final result, reducing the required investment and optimising performance.

What are the advantages of drying?

Let's talk about the advantages of the whole finishing process, which includes lacquer application and drying. The "finished" item ends up with improved resistance and protection from external agents, as well as a better aesthetic presentation.

What is meant by excimer drying?

Excimer drying is a drying process for UV coating products, which allows surfaces to be obtained with truly outstanding deep matt finish and resistance characteristics of the coating film. Normally it is a mixed cycle, which includes the evaporation of the solvents, followed by exposure to a dedicated lamp (an excimer lamp), to end with final UV crosslinking, necessary to definitively "lock in" the obtained result. The oven Exydry-Z ensures a deep matt finish, surface resistance and soft touch effect even on shaped or raised panels.

What is meant by inert atmosphere drying?

Drying in an inert atmosphere is obtained by dramatically reducing the amount of oxygen present in the oven and replacing it with an inert gas, nitrogen. Considering that oxygen is the natural barrier preventing the crosslinking process, this type of drying allows a 40-70% reduction in the quantity of photoinitiator needed to start crosslinking of UV coatings, resulting in significant cost savings. The first inert atmosphere oven on the market is UV-I.

What are the advantages of drying in an inert atmosphere?

In addition to the dramatic reduction in photoinitiator requirements, with the resulting lower cost of lacquers, drying in an inert atmosphere ensures other advantages. The lacquer used is less harmful to the environment. The yellowing effect caused by photoinitiators is less likely. Fewer UV lamps are required to activate crosslinking, resulting in lower energy costs.

How can I measure drying quality?

Different systems can be used to evaluate the drying quality and characteristics to be obtained from the finishing process. For example, if we want to test the final degree of resistance of the treated item, we will use destructive tests, or tests with solvents or with abrasive tools.

What should I expect in terms of consumption?

Mainly, consumption is in the form of electrical power, necessary to operate the fans that blow air or to handle workpieces inside the ovens, but also to power the lamps.

How simple is it to use a drying oven?

Normally drying ovens are rather simple machines, only a few parameters need adjustments and most importantly, these parameters remain stable even when the lacquer colours and/or the shapes of the coated pieces change. No particular skills are therefore required; it is necessary, however, to set the temperatures for the different zones (if any), the air speed and possibly the power of the lamps (if any).

How long does it take to clean a drying oven?

Normally drying ovens are basically maintenance-free, as these machines do not generally get very dirty.

Is a drying oven very maintenance-intensive?

It depends on the type of oven but generally speaking drying ovens are low maintenance. Only vertical ovens, due to their operating mode, require some extra care because of the loads that they have to bear, but all that's required is checking, tensioning and lubricating some of their parts.

Is there any after-sales service available near me?

Our international network of distributors and branch facilities is widespread globally, and most likely, you'll easily find the right contact in your own country. Otherwise, in just a few days we will send spare parts and technicians straight from our headquarters.

Can I easily manage process scheduling including drying?

The entire coating process, or the drying part only, can be managed through recipes, therefore in a very straightforward way.

Are the edges dried, too?

The drying process depends on the type of coating process. If the edges are treated during the work cycle, these will obviously require drying.

Can any oven be associated with any coating process?

Ovens, just like the coating application machines, have specific characteristics. This makes some ovens specifically suitable for some processes, while others are more flexible and able to adapt to different types of application. For example, a vertical oven is specifically intended for raised or shaped doors, but it can also be used for flat ones.

How flexible is the oven?

Each oven is created with a specific objective in mind. Within the scope of these specifications, it is obviously possible to adjust some parameters including temperature, air speed, power of the lamps and lamp distance. The machines are therefore inherently flexible when operating within their design scope.

Can I order spare parts easily?

 Yes. You can order spare parts by email, by phone, but also using cMaster, our dedicated App for ordering spare parts.

Products and Solutions

The search function is now available for complete production lines. All you need to do is select the material involved, the market sector or the finished product. Whichever search criteria is used, a corresponding solution for your spray coating line is obtained in just 3 steps. Search results will indicate the most suitable solution, based on the level of flexibility required, the productivity range and the overall footprint. Solutions are classified as small (S), medium (M) or large (L).

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