05.1 - Graduação (UACSA)
URI permanente desta comunidadehttps://arandu.ufrpe.br/handle/123456789/2909
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Item Avaliação do desperdício no processo produtivo de embalagens Doy Pack: possíveis causas e soluções(2022-09-29) Pereira, Juliane Paula de Lima; Andrade, Daniela de Lourdes Anjos Coutinho Simões; Andrade, André Luís Simões; http://lattes.cnpq.br/9922792912017424; http://lattes.cnpq.br/8149955436222196; http://lattes.cnpq.br/2192126956757523Flexible plastic packaging has revolutionized the packaging sector due to its versatility, greater protection, barrier properties, and transparency, which have enabled its application in the most different industry segments. The manufacturing of these packages is relatively complex, depending on the type, and involves variables ranging from the transformation process of the raw material to the product ready for commercialization, and waste and losses are frequent in the process. Therefore, before reaching the final consumer, these packages go through several tests aiming to ensure the quality, protection of the filled product and avoid losses. Among these tests is the Coefficient of Friction (COF), which measures the friction force when sliding a material over a specific surface, and the determination of film thickness and grammage, that can be decisive in application and the choice of material. In this context, the present work aimed to identify and evaluate the possible causes of waste in the production process of Doy Pack packaging in a company in the metropolitan region of Recife and based on this data, develop an action plan to reduce these losses. To this purpose, one of the most important sectors of the company, the filling sector, was monitored, analyzing 30 samples (spools) during a 40 days period in the afternoon shift. During this period, the COF was determined, before and after filling, grammage and thickness in random samples of the films also collected in the sector under analysis were determined. Finally, an action plan was developed to help reduce losses. According to the numerical results collected on the production line, it was possible to observe that the pre-filling friction coefficient was generally in the range required in the company's standard procedure, and that after going through the filling process, this coefficient increased, hindering the sliding of the films on the reels, and causing losses. Therefore, it was observed the need for constant control of the friction coefficient, since it, being in compliance, guarantees the proper sliding of the films for Doy Pack packaging, the lower the COF, the easier the films slide on the reels, facilitating production, reinforcing the importance of controlling this physical property in the plant. The thickness and grammage results were within the company's specifications, requiring no adjustments.Item Avaliação do uso de politereftalato de etileno (PET) pós consumo na indústria de embalagens alimentícias(2021-07-15) Silva, Bárbara Stefany Lima Da; Andrade, Daniela de Lourdes Anjos Coutinho Simões; http://lattes.cnpq.br/8149955436222196; http://lattes.cnpq.br/0185643398779242The environmental appeals and the high percentage of Poly (Ethylene Terephthalate) - PET waste, discarded in nature, often inappropriately, drive the packaging market to seekalternatives for the use of post-consumer recycled PET (PET-PCR). In order to assist in this purpose, this work evaluated the feasibility of using 100% recycled PET as a raw material in the production of food packaging. For this purpose, PET-PCR was injected ina two-stage Husky injection molding machine with a 48-cavity mold. The results were compared with those of virgin PET (PET-V), a raw material already used, in order to evaluate the influence of the resin type used on the quality and viability of the preform for application in the packaging sector. The green coloring additive was added in both formulations, with 0.04% and 0.07%, by mass for PET-V and PET-PCR, respectively, to guarantee the color required in some types of carbonated beverages. According to the results obtained, the parameters established for the PET-PCR forming process did not cause injection defects or great divergences in relation to PET-V. Through intrinsic viscosity analysis, visual inspection, colorimetry and differential scanning calorimetry (DSC), it was noticed that PET-PCR is more susceptible to degradative hydrolytic fissionreactions, as expected, since it is a resin which has a thermal history, but these reactions do not make its use unfeasible in food packaging. The gas chromatography results show that the injection process used for PET-V provided higher acetaldehyde contents, this result was attributed to the more aggressive conditions during the extrusion step and, finally, the specific migration test showed that the PET- PCR is within the limits applicable according to the Brazilian Legislation for Carbonated Drinks (ANVISA - Technical Information No. 71 of February 11, 2016). Thus, PET-PCR can be used in theproduction of food packaging since the deviations found are purely esthetic and do not interfere with its quality and applicability.