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Issue 05/2017

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  • Bioplastics
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Fibers & Textiles Yarns

Fibers & Textiles Yarns from biobased polymers Sustainable options for technical textiles The need to reduce CO 2 emissions and to become independent of fossil-based fibre products motivated PHP Fibers (Wuppertal, Germany) to search for bio-based alternatives. The company’s investigations revealed two potential candidates, both of which are thermoplastic polymers suitable for fibre spinning. Biobased and biodegradable high-tenacity polyester yarn (PLA) PHP’s polyester yarn Diolen ® 150BT is based on PLA and thus 100% biobased and biodegradable under industrial composting conditions. The polyester yarn exhibits low moisture absorption and provides good UV stability as well as low flammability. Compared to textile yarns, Diolen 150BT demonstrates superior tensile performance. It is therefore an option for a variety of sustainable applications. Examples are the substitution for non-biodegradable fixtures in agricultural and horticultural environments or sustainable packaging reinforcement for paper-based adhesive tapes Enka ® BIO – Biobased high-tenacity polyamide yarn For existing technical fibre applications, it would be particularly advantageous if yarns manufactured from biobased polymers could be considered as so-called drop in alternatives for current fossil-based products. In this case, similar processing conditions could be used without the need to make significant adaptions. In comparison to fossil-based PA 6.6 polymer, the bio-based PA 4.10 polymer was found to provide a very good match: The melting temperature and glass transition temperature of PA 4.10 are at the level of PA 6.6. But Polyamide 4.10 offers weight advantages due to its lower density. It picks up less moisture compared to PA 6.6 and it provides a 40 % higher tensile modulus under humid storage conditions. The material is 70 % bio-based. Technical biobased PA 4.10 yarn vs. technical fossil-based PA 6.6 yarn Spinning evaluations carried out on an industrial scale proved that the biobased PA 4.10 polymer can be converted into technical multifilament yarns. The tensile characteristics were found to be largely comparable to those of fossil-based PA 6.6 technical yarns. At low elongation rates, the modulus of biobased PA 4.10 yarn is certainly at the level of PA 6.6. The Elongation at break is higher and the breaking force is slightly lower compared to PA 6.6. In Mechanical Rubber Goods application PA 4.10 yarns/ cords provide good adhesion characteristics to rubber and fatigue resistance at the level of reference PA 6.6. PHP Fibers demonstrated that biobased technical polyester (PLA) and polyamide fibres can compete with or even outperform standard fossil- based polyester and polyamide fibres. MT Polymer properties of biobased PLA polymer vs. fossil-based PET polymer *) Sources: Mary Ann Liebert, Inc. Vol.6, no.4, August 2010, Industrial Biotechnology, Natureworks Polymer Melting Temperature, Tm °C Glass Transition Temperature, Tg °C Density g/cm³ Moisture Uptake at 50 % RH* % Tensile Modulus dry* MPa Tensile Modulus conditioned 50 % RH* MPa Biobased content % CO 2 Emission* kg CO 2 eq / kg polymer PLA 160 – 180 55 – 60 1.24 0.2 2900 – 3000 n.a. 100 0.6 PET 250 – 260 70 1.38 0.4 2800 – 3100 n.a. 0 3.4 Polymer properties of biobased PA 4.10 vs. fossil-based PA 6.6 *) Sources: DSM primary data for PA 4.10 (EcoPaXX), Plastics Europe eco-profiles for PA 6.6 Polymer Melting Temperature, Tm °C Glass Transition Temperature, Tg °C Density g/cm³ Moisture Uptake at 50 % RH* % Tensile Modulus dry* MPa Tensile Modulus conditioned 50 % RH* MPa Biobased content % CO 2 Emission* kg CO 2 eq / kg polymer Bio PA 4.10 250 70 1.09 1.9 3100 1750 70 0 PA 6.6 255 74 1.14 2.7 3250 1250 0 6.4 14 bioplastics MAGAZINE [05/17] Vol. 12

Fibers & Textiles The biodegradation after storage under composting conditions in accordance to EN 14046:2003 was determined by ITV Denkendorf, Germany. start 5 weeks 8 weeks start 5 weeks 8 weeks 110 pages full color, paperback ISBN 978-3- 9814981-1-0: Bioplastics ISBN 978-3- 9814981-2-7: Biokunststoffe 2. überarbeitete Auflage ‘Basics‘ book on bioplastics This book, created and published by Polymedia Publisher, maker of bioplastics MAGAZINE is available in English and German language (German now in the second, revised edition). Tenacity (cN/tex) 40 30 20 10 10 20 30 40 50 The book is intended to offer a rapid and uncomplicated introduction into the subject of bioplastics, and is aimed at all interested readers, in particular those who have not yet had the opportunity to dig deeply into the subject, such as students or those just joining this industry, and lay readers. It gives an introduction to plastics and bioplastics, explains which renewable resources can be used to produce bioplastics, what types of bioplastic exist, and which ones are already on the market. Further aspects, such as market development, the agricultural land required, and waste disposal, are also examined. An extensive index allows the reader to find specific aspects quickly, and is complemented by a comprehensive literature list and a guide to sources of additional information on the Internet. Elongation (%) Technical PLA yarn - Diolen 150BT Textile PLA yarn* *) Source “Polylactic acid fibres”, D W FARRINGTON et al., NatureWorks LLC The author Michael Thielen is editor and publisher bioplastics MAGAZINE. He is a qualified machinery design engineer with a degree in plastics technology from the RWTH University in Aachen. He has written several books on the subject of blow-moulding technology and disseminated his knowledge of plastics in numerous presentations, seminars, guest lectures and teaching assignments. Tenacity (cN/tex) 80 60 40 20 4 8 12 16 Order now for € 18.65 or US-$ 25.00 (+ VAT where applicable, plus shipping and handling, ask for details) order at, by phone +49 2161 6884463 or by e-mail Or subscribe and get it as a free gift (see page 57 for details, outside German y only) Elongation (%)

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