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.