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Wpływ stopnia filtracji na własności wytrzymałościowe trójwarstwowej folii z PET

Rojek M., Wróbel G., Bagsik R., Szymiczek M.

Przetwórstwo Tworzyw

2013

[R.] 19, nr 1 (151)

41--45

W ramach pracy scharakteryzowano proces filtracji materiałów polimerowych. Przedstawiono wady i zalety procesu filtracji, który jest wykorzystywany przy recyklingu termoplastycznych materiałów polimerowych. Omówiono proces recyklingu surowcowego politereftalanu etylenu (PET). W ramach badań przygotowano próbki z folii wytworzonej na wytłaczarce z trzema zestawami sit filtracyjnych. Zadaniem sit jest oczyszczenie roztopionego materiału. Po przeprowadzeniu filtracji, zostały pobrane próbki folii odpowiadające poszczególnym zestawom sit. Próbki poddano badaniom własności wytrzymałościowych.

With the paper the filtration process of the polymer materials is characterized. The pros and cons of the filtration process, which is applied during the recycling of thermoplastic polymer materials are discussed. Presented is the process of the recycling of polyethylene terephthalate (PET). Within the frame of the research the samples of film produced with the use of extruder with three sets of filtration sieves are prepared. The role of the sieves is the purification of the melted material. After the completion of the filtration, the samples of the film are taken. They are corresponding to the individual sets of nets, which were subjected to the examination of the strength properties.

The importance of PET filtration for the possibility of material recycling

Wróbel G., Bagsik R.

Journal of Achievements in Materials and Manufacturing Engineering

2010

Vol. 43, nr 1

178-191

Purpose: With the development increasing of plastics production the problems associated with their disposal have appeared on. Because of the large volume of plastic wastes and their limited long-term resolution, there is a need for treatment and reuse. For this purpose, with tests of properties, studies on plastics recycling and reprocessing into new products (recyclate) are conducted. The basic technological problem connected with using of secondary material is to clean it. The basic utility problem is the impact of recycling operations on the properties of the secondary material. The work to this issue is mainly devoted. Design/methodology/approach: One of the basic surgery to restore the plastics reusing ability is impurities removing. An available modern way is to use a specialized system of filtration sieves. Optimization problem is to select the proper filter in terms of mechanical properties of the resulting recyclate. In the work, the secondary material with using of grid filter of varying size has been tested. Prepared, with using of purified secondary plastic, three layer film to tensile test was subjected. Findings: The result of the tests described in this work is the preliminary determination of the filtration effect on the mechanical characteristics of the selected secondary materials. Research limitations/implications: The results confirm the impact of the quality of filtration of thermoplastics in the process of secondary processing on the base product properties. The accuracy of the pollution elimination process affects directly on the mechanical characteristics of secondary material. Used in the research procedure filtration system with automatic filter change operation helps to minimize the impact of filtering on the performance of the extrusion process. Practical implications: Practical benefit of the study is the confirmation of the possibility and desirability of material recycling, particularly with using of modern filtration system. Originality/value: The original value of the research are qualitative and quantitative assessment of the effects of filtration on the characteristics of the secondary material.