From the Sector

The DiloGroup informs at Techtextil in Frankfurt (June 21 – 24, 2022) about new developments aimed at improving production technologies with a focus on needlefelts.

It becomes more evident that the textile industry comes into the focus of regulatory authorities who push respecting sustainability principles and who initiate a new body of laws. Hence all industrial sectors are requested to achieve savings in material and energy. The textile machine building, of course, plays an important role by seizing this initiative and offering solutions for fibre pulp recycling and reduction of energy, water and ancillaries. DiloGroup has made big efforts to meet these challenges together with a circle of partner companies. In this regard focal points of the development work are:

1. Intense Needling
   Needling per se is a mechanical production method with a high energy efficiency. For this reason, the development efforts of DiloGroup aim at producing nonwovens by “intense needling” instead of water entangling, even for light nonwovens made of fine fibres for the medical and hygiene sector with an area weight of 30 – 100 g/m². This would result in a reduction of the environmentally relevant production costs; per annum to about 1/3 to 1/5 of current.
   Despite the prospective advantages of the mechanical intense needling method over the hydrodynamical, water entanglement is at the moment the most important production method for low area weights and highest production capacity and is also offered by the DiloGroup as general contractor in cooperation with partner companies.
2. “Fibre Pulp Recycling”
   Fibrous material in nonwovens and particularly used clothes can be successfully recycled, if staple length can be conserved in the tearing process. In the classical tearing process, staple lengths are dramatically reduced and therefore these fibres can only be used as base material for inferior uses in thermal or acoustic insulation or in protective textiles, transportation or protective covers etc.
   When recycling textile waste in the context of the collection of used clothes, the so called “filament-saving” tearing using special tearing machines and methods must be used to produce fibres with longer staple lengths which can be fed to a nonwoven installation. Hence product characteristics can be better specified and controlled.
3. Additive nonwoven production
   The additive production method of the “3D-Lofter” is especially suited for automotive parts with differently distributed masses; but there may also be potential for increasing uses in the sector of apparel and shoe production.
4. “IsoFeed”-card feeding
   In the field of card feeding, the “IsoFeed” method offers great potential for a more homogeneous card feeding at the same time reducing the variation in cross-machine fibre mass distribution and thus the fibre consumption while conserving the end product quality.

International technology group ANDRITZ will be presenting its special-purpose machines for needlepunch production (including its portfolio for carbon applications) at JEC World 2022 in Paris, France, from May 3 to 5.

Experience and Know-How
ANDRITZ designs, develops, and engineers special-purpose machines for very specific and sensitive applications, like aerospace, railway, and military needs. Therefore, it can provide the market with customized machines offering perfect solutions, whether they are needed for prototypes or for industrial production.

Skilled Engineers
In increasingly demanding markets, the skilled ANDRITZ engineers and technicians help customers get the most out of their investments. The variety of cases they face every day enables them to optimize both output and quality depending on the fibers used, the challenge, and the customer’s final application.

Carbon Expertise
Experience with conductive fibers enables ANDRITZ to overcome challenges and provide access to new product developments. The company’s expertise lies in textile know-how as well as a deep understanding of related constraints. It includes carded/crosslapped processes for nonwovens made from recycled carbon fibers, which can be delivered in rolls or die-cut shapes.

Unconventional Needling for End-Uses
ANDRITZ addresses customers’ challenges by offering solutions and expertise in terms of straight and multi-axial needling, enabling the consolidation of fibers on flat or non-flat surfaces (such as rounded shapes) and even of layers up to 350 mm thick. New developments are made possible thanks to the outstanding ANDRITZ testing facility.

Support and Development
The ANDRITZ needlepunch technical center in Elbeuf, France, is open to visitors. Innovative strength and adaptability are the characteristics that make ANDRITZ the preferred partner in the search for genuine, efficient, and reliable solutions in the interests of productivity and premium, state-of-the-art consolidation. Secrecy being key in such sensitive development work, ANDRITZ naturally always guarantees the utmost confidentiality.