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Issue 05/2017

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bioplasticsMAGAZINE_1705

Fibres & Textiles Batch

Fibres & Textiles Batch 03 while setting up a twist factor to α m = 80 T/m reaches given values of T t = 25 tex most closely. The necessary yarn count is reached at a production speed of v pr = 20 m/min. (Fig. 2) The measured elongation values show a high variation (Fig. 3) and no link between elongation and production speed can be determined. At twist factor of α m = 80 T/m and a production speed of v pr = 23 m/min a high amount of yarn breakage occurred. Therefore is it recommended to use a higher twist factor of α m = 100 T/m Fig. 3: Elongation of ring spinning yarn from batch 03 29,0 — 27,0 — 25,0 — 23,0 — 21,0 — 19,0 — Measuring head = 10 N Clip type = 4g Clamping length = 50 mm V prüf = 50 mm/min ≙ 0,50 cN/tex The count-related tenacity of batch 03 ring spun yarn has rather high deviations for all different yarns. The reason for this is the unevenness of the sliver which is immanent to the manual production step. 17,0— 0,0 — α m = 80 α m = 100 Decrease in force = 50 % V pr The hairiness of the ring spun yarn from batch 03 is shown in Fig. 5. At a twist factor α m = 80 T/m, a value of 10.7 is achieved. The higher twist factor of α m = 100 T/m and the production speed of v pr = 20 m/min achieve the recommended minimal hairiness of H = 8.14. Due to the manual production of the sliver, the evenness of ring spun yarn of batch 03 reaches values of CVm = 26.9 %. Batch 03 shows decreasing CVm-Values, independent from the twisting factor, with increasing production rate. Conclusion and outlook PLA staple fibres are a possible alternative as a substitution of existing synthetic fibre products. At the current state of the project, Ring spinning yarn of 100 % PLA was successfully produced. The article presents the results from the laboratory analysis of the produced ring spinning yarn. A yarn count of T t = 25 tex was achieved with optimised production parameters. The scientific findings from the performed experiments suggest that the higher twist factor α m = 100 T/m and production speed of v pr = 20 m/min are good production parameters to achieve the yarn properties which the SPEY project aims for. Further experiments on ring and rotor spinning machines and the production of a woven fabric with the experimental PLA yarns will be performed in 2017. Acknowledgement Fig. 4: Count-related tenacity of ring spinning yarn from batch 03 18,0 — 17,0 — 16,0 — 15,0 — 14,0 — 13,0 — 12,0 — 11,0 — 10,0 — 9,0 — 0,0 — α m = 80 Fig. 5: Hairiness of ring spinning yarn from batch 03 α m = 100 15 m/min 20 m/min 23 m/min Measuring head = 10 N Clip type = 4g Clamping length = 50 mm V prüf = 50 mm/min ≙ 0,50 cN/tex Decrease in force = 50 % V pr 15 m/min 20 m/min 23 m/min Grateful acknowledgement goes to the research association Forschungskuratorium Textil e. V., a branch of the German Federation of Industrial Research Associations (AiF), for the financial funding — through AiF-CORNET — of the research project AiF-No. 153 EN SPEY. Grateful acknowledgement goes also to the company Schlafhorst, branch office of Saurer Germany GmbH & Co. KG, for providing their expertise and assets for performing the ring spinning trials. References: [1] Euratex, The EU-27 Textile and Clothing Industry in the year 2012, May 2013 [2] Position of the European Textile and clothing industry and its applied research community on support for SME Research & Innovation under Horizon 2020. Euratex, March 2012 [3] IVC Jahresbroschüre 2013 Chemiefaserzahlen und Baumwolle-Wolle 11,5 — 11,0 — 10,5 — 10,0 — 9,5 — 9,0 — 8,5 — 8,0 — 7,5 — 0,0 — α m = 80 α m = 100 V prüf = 50 mm/min t prüf = 1 min Principle: optical V pr 15 m/min 20 m/min 23 m/min [4] http://www.natureworksllc.com/the-ingeo-journey/Eco-Profile-and-LCA/Eco-Profile. aspx#GHG [5] Uster statistics, http://www.uster.com/en/service/uster-statistics/, visited on May 27th, 2014 www.ita.rwth-aachen.de Fig. 2: 29,0 — Yarn count 28,0 — of ring spinning 27,0 — yarn from 26,0 — batch 03 25,0 — 24,0 — 23,0 — F V = 0,5 cN/tex Reel length = 10 m Figure 4.1 Evenness of ring spinning yarn from batch 03 31,0 — 29,0 — 27,0 — 25,0 — 23,0 — 21,0 — V prüf = 100 mm/min t prüf = 1 min Principle: capacitive 22,0 — 19,0 — 21,0 — V pr 17,0— V pr 20,0— 0,0 — α m = 80 α m = 100 15 m/min 20 m/min 23 m/min 0,0 — α m = 80 α m = 100 15 m/min 20 m/min 23 m/min 20 bioplastics MAGAZINE [05/17] Vol. 12

Industrial Solutions Polylactide Technology Uhde Inventa Fischer Polycondensation Technologies has expanded its product portfolio to include the innovative state-of-the-art PLAneo ® process for a sustainable polymer. The feedstock for our PLA process is lactic acid, which can be produced from local agricultural products containing starch or sugar. The application range of PLA is similar to that of polymers based on fossil resources as its physical properties can be tailored to meet packaging, textile and other requirements. www.uhde-inventa-fischer.com bioplastics MAGAZINE [05/17] Vol. 12 21

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