There is no such thing as bad weather, only bad clothing. Functional garments therefore combine several properties: protecting from cold and wet while allowing the skin to breathe; retaining their shape even after several washings to ensure we can enjoy our favourite piece of clothing for a long time. Re-define your clothing collection with sandler fiberskin® nonwovens. They keep us warm applied in skiwear for a fun day on the slopes, in outdoor and leisure jackets protecting us even in stormy weather, or in trendy quilted jackets for the cold season.
These breathable textiles applied with an appropriate nonwoven/fabric combination provide for optimum temperature adjustment. With all this efficiency, these nonwovens are so smooth and light, you might just forget you are wearing a jacket at all. And this is why not only the garments themselves sport the “Confidence in Textiles” label. Even in lightweight, temperature stable sleeping bags nonwovens accompany us to outdoor adventures. And when the going gets tough, these textiles quickly absorb moisture and transport it away from the body. For long-lasting comfort in any situation.
Breathability describes a fabric‘s ability to allow air and water-vapour to permeate, preventing the accumulation of moisture. Breathable materials thus increase comfort in use and avert skin irritation, particularly in applications involving direct skin contact.
- Hygiene products & wound dressings: Breathable nonwovens allow the skin to breathe, increasing wear comfort whilst preventing an accumulation of fluids and skin irritation, particularly during extended use.
- Automotive: Breathable textiles in the car seat increase driving comfort, especially on long journeys.
- Construction industry: Permeable nonwovens contribute to the health of the occupants. They allow the walls of buildings to breathe when required. Simultaneously, they avert the accumulation of moisture, thus preventing structural damage and potential health issues caused by mould formation.
- Mattresses & bedding: Breathable materials allow for a restful and comfortable sleep.
- Fashion: Breathability is a vital function for product performance.
Breathability, also referred to as resistance to water vapour permeability, can be measured according to DIN EN 31092, respectively ISO 11092 using the thermo-regulatory model of human skin. Breathability indicates the rate at which perspiration is transported through the material.
STRUCTURE & SURFACE
The fibrous structure of nonwovens combined with diverse bonding technologies creates a multitude of different structures and surfaces, optimising and complementing function and efficiency of these materials depending on their respective application:
No plain surface is like the other. Depending on the requirements of the application, numerous “plain“ surfaces variants are available. A smooth / plain surface also characterises optimised surface integrity.
- Wipes: Smoothing the surface reduces linting. Furthermore, the nonwoven gains a more compact feel and becomes more stable due to a reduction in elongation.
- Automotive industry: Surface smoothing lends stability to the material and improves processability.
- Fashion: A well-bonded surface prevents fibres from penetrating the outer fabric.
Perforating or aperturing offers a specific method of surface structuring. It changes the material’s surface, giving the nonwoven a special design as well as additional functional properties. In wipes substrates perforation improves the cleaning effect: It enlarges the material’s surface area, enhancing its dust hold capacity.
Embossed nonwovens combine design and function. The material can be embossed with various motifs as a visual eyecatcher. In many cases, however, these designs also enlarge the nonwoven’s surface—a definite “plus” when it comes to dirt collection in wipes or absorbency in hygiene products. Multi-layer structures may be bonded via an embossing process, attaining adhesion between the layers without binders. Depending on the material and the utilised polymers these structures can be created thermally or by using hydro embossing. Visit our Design section for more details.
In offices or public spaces embossed acoustic components made of nonwovens may also offer a design feature.
Many Sandler qualities are available with end use oriented print motifs. Various designs for the hygiene and wipes industry emphasise the respective application. Visit our Design section and see for yourself or contact Sandler for your customised print design.
In technical applications such as filtration or construction, performance parameters such as the filter grade, relevant testing standards or the classification pertaining to thermal conductivity can be printed onto the material using inkjet printing upon special request of the customer.
Nonwovens can also be used in the form of composites consisting of several layers. Different nonwovens are combined with one another or with other materials. These multi-layered structures combine the diverse properties and functionalities into one product, fulfilling the highest quality standards. Multi-layer composites may also facilitate processing. The possible combinations are virtually unlimited:
- Hygiene industry: Multi-layer nonwovens combine several functions in one product, such as the transport and storage of fluids.
- Medical applications: Together with other materials nonwovens also function as padding for improved in use comfort, particularly in extended use.
- Wipes: In cosmetics and other applications the combination of fine and coarse layers improves the cleaning effect.
- Automotive & upholstered furniture: Multi-layer nonwovens facilitate processing and lend stability, for example to leather seats: when laminated onto the leather, they prevent overextension in use, thereby reducing unsightly creases in the seat.
- Filtration: Multi-layer composites lend stability to the products: Ceiling filters, for example, are rendered more stable by a polyester fabric laminated to the medium.
- Technical applications: Composites of nonwovens or with a multitude of other materials can increase the stability or even the resistance to heat, acids or other influences.
- Fashion: Lamination to nonwovens imparts optimum surface integrity and prevents pilling and fibre penetration.
Retaining heat, preventing heat loss. Allmost everyone is familiar with these requirements when it comes to buildings, since we want to feel comfortable inside a building and be protected from wind and weather. However, whilst our cloths equally fulfil this function, efficient thermal insulation saves energy and costs.
Nonwovens are characterised by a special open-pored structure, featuring a porosity of up to 95 percent. The structure comprises very fine fibres and a large inner surface which also contains air—a very efficient heat insulator—setting the stage for excellent thermal insulation. The density and fibre structure of a nonwoven influence its thermal conductivity. By tailoring basis weight, thickness and fibre blend, the required level of thermal insulation can be achieved, thus having the ability to create a specific nonwoven for every application.
- Automotive: In the automobile, nonwovens also function as heat insulators. For instance they contribute to reducing fuel consumptionwhen used to retain heat in the engine compartment.
- Construction: Used as insulation materials for interior and exterior applications in roof and walls nonwovens add to a feel-good atmosphere, lowering the energy input by efficiently retaining heat, thus reducing costs.
- Outdoor clothing: Nonwovens retain body heat to maintain warmth.
In determining thermal insulation properties, the nonwoven’s thermal conductivity is vital. It is stated in the lambda coefficient of thermal conductivity: The lower the value of lambda, the higher the thermal insulation. Thermal conductivity is measured according to ISO 8301 or DIN EN 12667 using the heat flow method with plates. The test is carried out at an average sample temperature of 10°C.
Sandler's pleatable nonwovens for the filtration industry are suitable for processing on knife as well as rotation pleating lines. A homogenous, longitudinally oriented fibre structure provides for particularly accurate pleating and high pleat depths. The polymers utilised are temperature-stable, elastic and resistant to breakage, thus offering high stability: The pleats are dimensionally stable, yet are also flexible. They withstand mechanical influences during processing and temperature and humidity during use.
Cutting & die-cutting
Sandler nonwovens are easy-to-process using established cutting technologies such as band knives, CNC cutters, straight knives, water-jet cutting or laser cutting. Perforation cuts for tearoff wipes, for example, are also possible.
For hygiene products, automotive industry products, and for mat filters die-cutting is used, to which Sandler nonwovens are highly suited. Particularly in automobiles precision contouring facilitates accurate assembly onto the particular component. The material is also not distorted during die-cutting, resulting in accurate cuts with clean edges.
By selecting appropriate fibres, Sandler nonwovens are easily processable and can be sewn without difficulty—in the manufacture of fashion, mattress covers, car seats, and for pipe insulation or the production of pocket filters.