Applications

TURNING MATERIALS INTO SOLUTIONS

Acoustics

Steadily increasing noise pollution is a feature of our modern world, and various efforts are made to use acoustic measures to reduce noise levels, for example at airports, railway stations, in public buildings and offices.

Acoustic nonwovens in ceiling constructions, wall linings, room dividers or office furniture are an effective means of reducing noise. Effectively used acoustic nonwovens enable noise levels to be reduced by at least 10 dB. However, the effectiveness of any acoustics measure cannot be guaranteed by the quality of the acoustic nonwoven alone. Other factors play an important role as well.

  • Void depth
    The void depth measures the distance between room ceiling and ceiling construction.
  • Perforation size
    The perforation size indicates the diameter of the openings in the ceiling board.
  • Open area
    The open area specifies the percentage of “holes” in the ceiling.

Consequently, there is no such thing as an acoustic nonwoven that achieves consistently high absorption values in varying conditions (even if this is sometime claimed).

However, the acoustic nonwoven fabric can be adjusted in terms of air permeability and flow resistance so as to allow the best possible acoustical absorption for a given application. We are recognised experts in this area - find out for yourself.

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We are one of the leading specialists for acoustic nonwovens.
Find out for yourself about our expertise in this area.

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Composites

Composites consist of two or more different materials. In producing composites, we endeavour to combine the crucial properties of the individual components into a single product with enhanced properties.

Example: fibre-reinforced plastics - increased stability combined with a reduction in weight.
Wind generators, for example, would hardly have come into existence without such composites.

In terms of their geometry, composites can be classified as follows:

  • Particulate composites
  • Fibre composites
  • Laminated composites
  • Impregnated composites

Royalin produces laminated composites or laminates that consist of up to 6 components. Currently we mainly use nonwoven and woven fabrics, mats and various films in our production. Bonding of the individual materials is achieved with an adhesive agent.

„Turning Materials into Solutions“
This is the challenge we have set ourselves.
We produce layered composites or laminates made of up to 6 components!

Automotive

Today, nonwovens are found in various car parts. More than 80 applications are known, and one single car can contain well over 20m² of nonwoven fabrics - and the figure is on the increase. You would not recognise the majority of these fabrics as nonwovens at first sight.

The requirements for the nonwovens are as varied as the applications. The fabrics must be oil and water resistant, flame-resistant, temperature and dimensionally stable, just to name a few of them.

Whereas films, woven or knitted fabrics were originally used, the material for door panels, roofliners, the rear shelf, boot trims or engine compartment covers, for example, has been more and more dominated by nonwoven fabrics over the last 30 years or more. The reasons for using nonwovens instead of the materials originally used are obvious:

  • Nonwovens offer a wider range of functions when processed, among others with regard to their mouldability.
  • The price/performance ratio is much better, partly because they offer lower material weight with the same or better properties.
  • Recyclability of nonwovens is often better.
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Royalin sets standards for nonwovens in automotive applications

  • Acoustic and thermal insulation in passenger and engine compartments
  • Nonwovens for dimensionally stable components like bonnet and transmission tunnel
  • Air and cabin filter

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Filtration

Filtering gaseous and liquid media is a broad field, with more than 1,000 known applications, so numerous and complex requirements have to be met by the media and materials used.

Nonwovens are particularly suitable as filter media, as they offer a very large variety of fibrous raw materials, fibre lengths, fibre diameters (fibre fineness) and fibre cross-sections. They can be precisely “fine-tuned” to individual requirements in terms of mechanical stability, air permeability or pore size distribution.

The numerous finishing possibilities are another advantage. Nonwovens can meet requirements such as oil and water resistance, flame resistance, antibacterial or antistatic properties, to name just a few.

Most of the time, several factors are important in selecting a suitable medium and they frequently even contradict each other. For example improved filtration efficiency results in a higher pressure difference and consequently shorter service life.

Air filtration

Air filters are mainly used in the form of filter cells, cartridges and bag filters. In the case of filter cells and cartridges, the medium is folded. Royalin’s nonwoven fabrics are particularly suitable for this purpose.

Liquid filtration

There are numerous liquids and suspensions that need to be filtered. They range from pharmaceuticals to sewage sludge and therefore involve a wide range of different requirements and media.

Liquid filtration can be divided into two categories: Sewage filtration and cake filtration.

In the case of sewage filtration, the concentration of suspended solids is relatively low and there is a high flow velocity. Drinking water filtration is the most common example here. If the solids concentration is very high, so-called cake filtration is performed. The filtration of cleaning baths in metal processing is a good example in this context. For both categories, surface and deep bed filtration are possible.

Nonwovens are particularly suitable for liquid filtration because their mechanical, chemical and thermal properties can be widely adapted to the particular requirements. Nonwovens are mainly used as band filters, filter bags and in the form of cartridges and candle filters.

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