Aufrufe
vor 2 Jahren

WiN woodworking INTERNATIONAL 2020/2

  • Text
  • Woodworking magazine
  • Woodworking
  • Processing
  • Products
  • Solutions
  • Materials
  • Panel
  • Machining
  • Surfaces
  • Digital
  • Germany
  • Harnischcom
WiN - woodworking INTERNATIONAL is the international magazine for the woodworking industry. We report on all aspects of woodworking from board materials, wood treatment to machines, tools and technical know-how, from timber engineering supplies to the latest developments in technologies and markets.

SURFACES Resilient

SURFACES Resilient coating solutions for demanding environments Paint manufacturer Teknos focusses on sustainable, innovative exterior coating solutions for windows, doors, cladding and facades. The company unveiled a new hail-resistant premium topcoat for wooden windows and their latest solution for cladding; a fast-drying, directto-wood coating. Other solutions include a versatile line of powder coatings for metal surfaces and a fast-drying water-borne coating for uPVC and GRP. New hail-resistant premium finish for wooden windows. The new premium topcoat Teknofinish Hailresist is an exciting innovation that has been developed alongside a scientific research project. The paint uses flexible film technology that prevents the film from cracking around the hail impact spot and delivers a hail resistance class of HW 3. Clients also encounter the brand new Teknoclad range, a coating developed to improve speed of production for the wooden cladding sector. It can be applied direct to wood without priming, is block-resistant and fast-drying. Further innovative solutions include Teknosafe 2407, an intumescent primer, providing a durable fire protection solution for wood. When exposed to heat, this high-performance primer foams up to form an insulating carbon foam char that isolates the construction element and prevents the spread of flame. Teknosafe 2407 forms part of an opaque fire treated coating solution for exterior wood cladding and is tested according to a number of standards and regulations including EN13501-1. www.teknos.com Nanostructured polymer foil appears white without environmentally hazardous New materials: Brilliant white without pigments Polymer foils that are extremely thin and characterized by a high light scattering rate are produced by a new process developed by Karlsruhe Institute of Technology (KIT). The inexpensive material may be applied industrially to various objects to give them an attractive white appearance. Moreover, the process can make products environmentally more compatible. A nanostructured polymer film modeled on the white beetle Cyphochilus insulanus produces a brilliant white coating. (Photo: Julia Syurik, KIT) A brilliant white surface makes furniture and other objects appear clean, bright, and modern. So far, titanium dioxide has been the standard pigment used for white coloring of lacquers, paints, and plastics as well as of cosmetics, foods, chewing gum, or pills. How-ever, the pigment is in the focus of criticism. "Titanium dioxide has a very high refractive index, it reflects incident light almost completely. But it is associated with the drawback that its particles do not de-grade and thus pollute the environment in the long term," says Professor Hendrik Hölscher of KIT’s Institute of Microstructure Technology (IMT). In addition, there have been concerns that titanium dioxide could be harmful to health. "We avoid the use of pigments that are harmful to health and the environment by producing porous polymer structures of comparably high scattering efficiency," Hölscher says. He and his team were inspired by the white beetle Cyphochilus insulanus, whose chitin scales appear white thanks to their special nanostructure. "Based on this model, we produce polymer-based solid, porous nanostructures, which resemble a sponge," says Hölscher, who heads the Biomimetic Surfaces Group of IMT. Similar to the bubbles of shaving or bathing foam, the structure scatters light, which makes the material appear white. The new technology for low-cost and environmentally compatible white optics is suited for various surfaces. Environmentally Compatible Materials ‐ Modeled on Nature "The polymer foils produced by our process are extremely thin, flexible, and of low weight, but still mechanically stable and can be applied indus- trially to a variety of products," the physicist explains. At a thickness of 9 μm ‐ nine thousandths of a millimeter ‐ the newly developed polymer foil reflects more than 57 % of the incident light. 80 to 90 % can be achieved when increasing the thickness of the foil. In the course of the development work, the sponge-like microstructure was applied to acryl glass. However, the process may be transferred to many other polymers. "Apart from foils, entire objects may be colored white. As a next step, we plan to produce particles, e.g. small beads that are added to other materials," Hölscher says. "We have already received several inquiries from companies that want to make their products environmentally more compatible." While engineers frequently develop solutions based on materials made of several chemical elements, nature mostly restricts to a single basic material that has interesting mechanical, optical, or physico-chemical properties thanks to its complex three-dimensional structure. Bionics that focuses on understanding and imitating phenomena of nature to make them technically usable frequently leads to entirely new solutions that would never have been found in any other way, the researcher adds. www.materials.kit.edu 30 No. 2 • May 2020

SURFACES Osmo Polyx ® -Oil Express is based on natural oils and waxes. As a protective coat, it makes wood surfaces breathable and resistant to dirt, scratches and wear. (Photo: Osmo) The new Osmo Polyx ® -Oil Express makes wood surfaces durable, dirt repellent and attractive. Protection and care with best time guarantee With Polyx ® -Oil Original, Osmo Holz & Color GmbH & Co. KG offers a reliable product - a real classic for over 30 years - when it comes to protecting wooden flooring, such as solid wood, plank, strip floors, OSB and cork flooring as well as furniture surfaces reliably against dirt and moisture and enhancing the natural look the material. Osmo Polyx ® -Oil Express is a professional fast drying coating with a special surface hardness. Based on natural oils and waxes, it gives the wood a microporous and breathable surface and makes it resistant to scratches and abrasion. The treated surface is stain-resistant, water repellent and wear-resistant, and the coating smoothens the surface. Compared to conventional coating systems, the use of plant ingredients results in a more even colour and a more harmonious appearance. Cleaning and maintenance are also very easy. To display individual wood grain patterns perfectly, Osmo Polyx ® -Oil Express is available in three variations - Clear Satin, Clear Matt and White Transparent. The first coat is applied to the raw, sanded wood. After drying under good ventilation for only 2-3 hours, the second coat is applied, which means that finished surfaces can be created in just one day. A real hardliner Optionally the drying time can be shortened by approx. 50 % by adding Osmo Hardener for Polyx ® -Oil Express. This offers the decisive advantage for both private and commercial use in that the surface can be walked on again after a very short time. In addition to solid wood, plank, cork floors and even strip flooring, Osmo Polyx ® -Oil Express is also suitable for use on resinous and oily hardwoods, such as Merbau or Meranti, thanks to the possible application with a hardener. The contents of the Hardener are simply poured into the Polyx ® -Oil Express can and stirred thoroughly. The application carried out is the same as with Osmo Polyx ® -Oil Express with two successive coats. Since the pot life is reduced to 60 minutes by adding the Hardener, no more material should be mixed than what can be processed within 45 minutes. If the entire can of Polyx ® -Oil Express is not to be used, adding 6 % Osmo Hardener in a separate container is sufficient. www.osmo.de Osmo Polyx ® -Oil Express makes wooden flooring and furniture surfaces robust and hardwearing. Plus, it scores with its short drying time of only 2-3 hours, which makes a finished surface possible within only one day. Osmo Hardener for Polyx ® -Oil Express reduces the already short drying time by approx. 50 % and is suitable for applications on resinous and oily hardwoods. No. 2 • May 2020 31

Wählen Sie die gewünschte Fachzeitschrift

fng MAGAZIN - Food · Nonfood · Getränke · Tobacco