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22. December 2020

The new issue 6/2020 of PU Magazine International has been published!

The flexible foam polyurethane industry has been pummeled not only by Corona this year, but also by shortages of raw materials. We talked with some foam producers about their growing concerns and what they would like to see from raw material producers to reduce the risk of disruption.

Lee Salamone and Stephen Wieroniey, from the Center of the Polyurethane Industry (CPI), talk about the current crisis situation and how the association continues to support its members during this time.

Further highlights are:

  • The furniture industry in Africa, a market report synopsis by Alessandra Tracogna, CSIL
  • Chemical recycling, a market and technology report by nova-Institute
  • Arkema’s contribution towards the development of recyclable wind turbine blades
  • Lean management methods at Bäumer
  • and many other topics

Featured technical articles are:

  • Dry demoulding – practical demonstration of a mould coating with long service life
    (C. Hopmann, P. Surray, D. Schneider, P. Bitomsky, M. Noeske, K. Vissing)
    Sustainable thinking and acting is a constant driver of innovation in the polyurethane processing industry and is inherently applied in the development and implementation of future-oriented material and process technologies. Understandably, new technologies can succeed when they do not represent a step backwards in terms of robustness, flexibility and cost-effectiveness. In a German IGF cooperation (Industrial Collective Research) project at the Institute for Plastics Processing (IKV), Aachen, and the Fraunhofer Institute for Manufacturing Technology and Advanced Materials (IFAM), Bremen, the pilot plant readiness of a permanent release coating on a steel mould has now been demonstrated by consecutively demoulding more than 1,200 PU parts at constant low forces.
  • Catalyst solutions for stable polyol resin blends
    (M. Meredith, D. Pham, R. A. Grigsby Jr.)
    Traditional and non-traditional amine-based urethane catalysts were evaluated for storage stability in polyol blends that use new low global warming potential (GWP) blowing agents, namely 1233zd(E) and 1336mzz(Z). Foam profiles were used to monitor each polyol blend throughout a defined storage time and temperature. As expected, molecular structure is a major factor in stability with halogenated olefin blowing agents, with traditional, unhindered amines degrading over time and blocked, hindered, or electronically deactivated amines providing stability.
  • Low emissions from polyurethane foaming materials
    (C. Shen, C. Ju, J. Du, H. Yu, J. Yu, D. Sinopoli)
    As automotive OEM requirements continue to focus on improving the indoor air quality of the vehicle and as the industry continues to face high environmental pressure to comply with low volatile organic compounds (VOC) and aldehyde emissions, raw material suppliers and polyurethane converters have had to come up with new product offerings to meet these requirements. Wanhua Chemical’s experience in sustainable development from theory to practice provides new alternatives to the value-chain. This paper primarily focuses on the sources of aldehydes in polyurethane raw materials and additives. Suggested improvements of aldehyde emissions are proposed from the perspective of improving the quality of the base polyether polyol, the selection of additives, and the aldehyde scavenger. Moreover, the impact of foam aging on aldehyde forming under the conditions of light, heat and oxygen is also discussed in this article.

Further information about the new issue at https://www.gupta-verlag.com/magazines/pu-magazine-international/06-2020.

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