Felt sheets

Felt sheets are compressed fibre materials used as protective, sliding and damping layers in constructions. In industry, they frequently serve as interlayers, covers, underlays or for vibration and noise damping.

Structure and production

Technical felt sheets are created by compressing and consolidating fibres, typically by needle felting or fulling. Density, thickness and fibre composition control the mechanical load capacity, the recovery behaviour and the damping effect.

Typical functions in operation

• Damping of impacts and vibrations between components
• Surface protection as an interlayer during assembly, transport and storage
• Sliding layer and coefficient of friction adjustment in simple guide situations
• Sound and thermal insulation as an additional layer in the structure

Cut to size, formats and specification

For series and spare part requirements, felt sheets are frequently procured as a cut to size to drawing or dimensional specification. For production and repeatability, material thickness, weight per unit area or density, dimensions and the required edge quality are what count.

For dimensionally accurate formats and reproducible cut pieces, the rubber cut to size is suitable as a production and enquiry process. For more complex contours, quantities or defined tolerances, rubber machining complements the implementation.

What are technical felts?

Technical felts are functional felt materials developed specifically for industrial and commercial applications. They perform defined tasks such as damping, sealing, insulation or surface protection and are specified according to technical characteristics.

Typical characteristics of technical felts

In contrast to decorative felts, technical felts prioritise reproducible material properties. Selection and design are always application-related.

• Manufacture from natural fibres such as wool or from synthetic fibres such as polyester or polypropylene
• Defined densities and thicknesses for controllable spring and damping behaviour
• High mechanical strength and dimensional stability under continuous load
• Resistance to oils, greases, solvents and other media
• Temperature resistance depending on the version, up to high service ranges

Production processes

Technical felts are created by the targeted consolidation of fibres. Depending on the requirement, different processes are used, including needle felting, fulling or chemical consolidation. Density, structure and service life can be precisely controlled via the process.

Industrial fields of application

Technical felts are used as sealing, sliding or damping elements in machines and systems. They protect components from wear, reduce noise and compensate for tolerances.

Further applications are found in construction and vehicle engineering for thermal and sound insulation, in the furniture and packaging industry as protective and padding material, and in the paper and textile industry as roll or belt material. In metalworking, technical felts also serve as carrier material for grinding and polishing systems.

For industrial use, technical felts are generally supplied as a cut to size or adapted to the respective application via further machining processes.

What are felt mats?

Felt mats are sheet-like felt materials of low to medium density, produced by the felting of fibres. They are characterised by their flexibility, softness and ease of processing and are used in both industrial and decorative and craft environments.

Production of felt mats

Production is carried out by mechanical or chemical felting of fibres. Two processes are common: wet felting and needle felting. In wet felting, the fibres bond through moisture, movement and pressure. In needle felting, the fibres are interlocked with the aid of barbed needles, creating a uniform, textile sheet structure.

Materials

Felt mats are classically made of sheep's wool. Synthetic fibres or fibre blends are additionally used where properties such as dimensional stability, abrasion resistance or insensitivity to moisture are the priority.

Typical properties

• High flexibility and good adaptation to substrates
• Thermal and sound-insulating effect
• Moisture absorption with subsequent release
• Low weight and easy cuttability

Fields of application

Felt mats are used as protective and underlay material, for example for surface protection, for light insulation or as a padding layer. In industry and trade, they serve among other things for vibration damping, as a simple sealing layer or as a felt strip. They are also used in the furniture sector, in construction and in creative and decorative environments.

Distinction from felt sheets

Compared with felt sheets, felt mats are thinner, softer and considerably more flexible. Felt sheets have a higher density and dimensional stability and are preferably used for technical and structural tasks. For functional applications with defined dimensions and higher load, felt sheets are therefore usually used.

Difference between felt mats and felt sheets

Felt mats and felt sheets both consist of felted fibres, but differ significantly in structure, strength and field of application. The following comparison makes selection easier for technical and commercial applications.

Characteristic	Felt mats	Felt sheets
Density	Low to medium	Medium to high
Thickness	Mostly thin	Multi-layer, also large material thicknesses
Flexibility	Very flexible and pliable	Dimensionally stable and stiffer
Mechanical load capacity	For light stress	For continuous and higher loads
Typical function	Underlay, protection, light insulation	Damping, sealing, structural interlayer
Main focus of use	Decorative, craft, simple technical	Industry, mechanical engineering, technical applications

For applications with clearly defined requirements for compressive strength, dimensional accuracy and service life, felt sheets for technical applications are generally suitable. Felt mats are used above all where flexibility and ease of processing are the priority.

Selection criteria for felt sheets

The selection of a suitable felt sheet depends on the functional requirements of the application. Mechanical load, ambient conditions and the required service life are decisive.

Density and weight per unit area

The density determines the spring and damping behaviour of the felt sheet. Lower densities are suitable for protective and interlayer applications, higher densities for continuous loads and dimensionally stable applications.

Thickness and dimensions

The material thickness influences pressure distribution, insulation and compensation of tolerances. Felt sheets are available in different thicknesses and are frequently cut precisely to size to enable a precisely fitting integration.

Material and fibre type

Depending on the application, felt sheets made of natural fibres or synthetic fibres are used. Natural felts offer good damping properties, synthetic felts score with more consistent material values and higher media resistance.

Mechanical and thermal load

For applications involving pressure, friction or movement, strength and recovery behaviour are decisive. In temperature-loaded areas, the felt sheet must be matched to the intended service range.

Machining and further processing

Felt sheets can be cut, punched or contoured. For complex geometries, series production or tight tolerances, a matched further processing in combination with a defined cut to size is recommended.

Felt sheets as a cut piece or moulded part

Felt sheets are rarely used in industry as a standard format. In practice, delivery is predominantly as a dimensionally accurate cut piece or as an individually manufactured moulded part.

Felt sheets as a cut piece

The cut piece is suitable for rectangular or simply contoured components. Dimensions, material thickness and tolerances are defined in advance, so that the felt sheets can be used directly in the application.

Felt sheets as a moulded part

For more complex geometries or functional requirements, felt moulded parts are used. These are punched, contoured or built up in multiple layers and fulfil tasks such as sealing, damping or guiding within an assembly.

Series production and repeat accuracy

For series applications, consistent material quality is decisive. Dimensionally accurate production and reproducible properties ensure stable processes and calculable service lives.

Technical implementation

Depending on the component geometry, implementation is carried out via precise cut to size or further machining steps. In this way, felt sheets can be adapted exactly to the respective application.

Frequently asked questions about felt sheets

What are felt sheets mainly used for?

Felt sheets are used as damping, protective and sealing material. Typical applications are found in mechanical engineering, in conveyor technology, in plant construction and in surface and transport protection.

Which thicknesses are common for felt sheets?

Felt sheets are available in different material thicknesses. Common thicknesses range from a few millimetres to multi-layer versions for higher loads. The selection depends on pressure, damping requirement and installation situation.

Are felt sheets resistant to oil and chemicals?

The resistance depends on the felt type used. Synthetic felts generally offer higher resistance to oils, greases and chemicals than natural felts. The selection is made on an application-related basis.

Can felt sheets be manufactured to size?

For industrial applications, felt sheets are mostly supplied as a cut to size or as a contoured moulded part. As a result, they can be integrated directly into existing assemblies.

How is the further processing of felt sheets carried out?

Depending on geometry and quantity, felt sheets are cut, punched or contoured. For series production and complex shapes, a matched technical machining is used.

What is the difference between felt sheets and felt mats?

Felt sheets have a higher density and dimensional stability and are suitable for technical applications. Felt mats are thinner, more flexible and are more frequently used for protective or underlay functions.