Technical Felts
As specialists in the field of technical felts, we ensure that the products we create and enhance meet the individual needs of our clients. Our range of wool felts and synthetic (needle-punched) felts finds wide application in many industries.
As a distributor of M&K Filze GmbH, we offer you top-quality technical felts, nonwovens, and final products such as felt discs and pads. To ensure our customers’ satisfaction, all the products we offer undergo constant quality control.
To assist you in selecting the appropriate product, we provide professional technical and substantive advice.
Depending on its volumetric density, wool felt can absorb and retain oil up to a capacity exceeding its own weight. The general rule is: the softer the felt, the greater its oil-holding capacity. Through capillary forces, oil can be transported despite gravity. The following principles apply:
-The softer the felt, the greater the pumping volume.
-The harder the felt, the greater the pumping height.
-The lower the oil viscosity, the greater the pumping volume and height.
The hardness of felt determines its resistance to pressure and deformation. It increases with volumetric density, but comparisons are only valid among the same types of felt.
| Property | Less | More |
| Hardness Tolerance | X | |
| Weight Tolerance | X | |
| Absolute Compressibility | X | |
| Pressure Resistance | X | |
| Air Permeability | X | |
| Tensile Strength | X | |
| Tear Strength | X | |
| Abrasion Resistance | X | |
| Liquid Storage Capacity | X | |
| Capillary Forces | X | |
| Sound Absorption Degree | X | |
| Thermal Conductivity Coefficient | X |
For example, if we are talking about felt with a volumetric density of 0.36 g/cm³, then the weight of 1 cm³ of such felt is 0.36 g. The determination of volumetric density from mass and volume is done according to DIN 53854 and DIN 53855.
The hardness of felt can be increased by adding binding substances. Felt whose hardness has been increased in this artificial way deviates in many of its other characteristics, often to its disadvantage, compared to felt with natural, unmodified hardness
During the densification of wool fibers through fulling, diluted sulfuric acid is added. After fulling, the acids are largely neutralized through washing. The pH value is adjusted from neutral to slightly acidic, as this state of wool fibers is optimal regarding properties like aging resistance, elasticity, and tear strength.
Standards regarding thickness and permissible deviations are contained in DIN 61206. Felts are produced in the form of sheets, blocks, rolls, and plates with thicknesses up to 120 mm.
The higher the volumetric density of the felt, the higher its abrasion resistance. Volumetric density provides information about the intensity of fiber bonding.
Felt has excellent properties for damping and isolating vibrations, impacts, and sound. As the thickness of the felt increases, the damping value also increases.
The acoustic characteristics of felt depend on its relative flow resistance (DIN 52213) and the degree of sound absorption (DIN 52215). As the volumetric density of the felt increases, the relative flow resistance value also increases.
Tensile Strength and Fracture Toughness
The behavior of felt under tension is directly related to the quality of the textile material used and the intensity of fiber densification. According to DIN 61206, there is a distinction in tensile strength and elongation between “longitudinal” and “transverse” directions.
Industry
Our company has been collaborating with the industrial sector for years. Based on our designs and those provided by clients, we deliver custom solutions for the glass, machinery, and automotive industries. With the ability to produce customized felt components, we can meet complex customer requirements. Our precise cutting techniques allow us to execute even the most demanding projects. With years of experience, we have solid references, and our products are consistently used by leading machine and equipment manufacturers throughout Poland.
Furniture
We invite furniture and chair manufacturers to collaborate with us. We offer a vast range of felts in over 100 colors, both woolen and synthetic, in various thicknesses for different applications. Our felts are featured in collections by renowned furniture manufacturers. The pleasant touch, durability, and color variety will satisfy even the most discerning customers. The felt we offer can serve as upholstery fabric, filler, or, in the form of NITONA® boards, as a construction material with additional acoustic properties. Thanks to our CNC cutting and lamination services, we can prepare felt in specified formats, ready for creating beautiful and functional furniture.
Automotive
Many types of felts are used in the automotive industry for creating professional car equipment. They serve to dampen noise and can also act as thermal insulation. Additionally, our felt can be used to protect surfaces from scratches, dampen vibrations, seal components, and in the production of car brakes and wipers.
Acoustics
Wool felt possesses remarkable properties that enhance acoustics while serving as an appealing interior design element. We confidently recommend using this material wherever there is a need to create cozy and comfortable spaces for work, study, and relaxation. Felt partitions and wall panels impart an extraordinary atmosphere to rooms. All felt acoustic elements—such as blinds, curtains, partitions, and panels—absorb sound and help create quiet zones. Furthermore, felt is breathable, positively affecting the climate in exhibition halls, cinemas, and open-space offices.
Wool Felt
Wool felt consists of sheep’s wool fibers condensed into a solid structure without the addition of binding substances.
Production Stages:
Possible Additional Features: Waterproofing, insect resistance, high-temperature resistance, and flame retardancy.
Needle Felt
Needle felt consists of artificial, synthetic, and natural fibers.
Since only limited densification is achievable during the needling process, needle felts are often additionally reinforced by impregnating them with binding substances.
DIN 61206 Standard
The DIN 61206 standard distinguishes:
- White Felt: Made from white-colored fibers.
- Mélange Felt: Made from fibers of different colors.
- Dyeing Capability: Felts up to a volumetric density of 0.3 g/cm³ can be dyed according to customer requirements.
White felt is produced from the wool of white sheep and meets the highest requirements in terms of tensile strength, abrasion resistance, and tear strength.
The different colors of fibers in mélange felt can have various origins. Naturally colored wool fibers do not differ in quality from white fibers. Regenerated, dyed fibers can also be mixed into mélange felts.
Colored felts are produced from white and mélange fibers by dyeing them. The mechanical and chemical strength of fibers decreases as a result of the dyeing process.
Temperature Resistance of Wool Felt
DIN 61206 specifies that wool felt has a temperature resistance of up to 120°C for short-term exposure (2 hours) and up to 80°C for continuous exposure (8 hours). For applications at higher temperatures, needle felt made of synthetic fibers is used.