Plastics In Packaging
Mostrando 13-24 de 24 artigos, teses e dissertações.
-
13. Nanocomposites: synthesis, structure, properties and new application opportunities
Nanocomposites, a high performance material exhibit unusual property combinations and unique design possibilities. With an estimated annual growth rate of about 25% and fastest demand to be in engineering plastics and elastomers, their potential is so striking that they are useful in several areas ranging from packaging to biomedical applications. In this un
Materials Research. Publicado em: 2009-03
-
14. Biodegradação de polietileno tereftalato (PET) por fungos ligninoliticos / Biodegradation of polyethylene tereftalate by ligninolytic fungi
In 1977, polyethylene terephthalate (PET), a plastic derived from petroleum, started to be used as raw material for packaging material and engineering plastics. However, under an environmental point of view, the use of plastics is considered problematic because of their high durability and high volume when present in domestic and industrial solid wastes. Thi
Publicado em: 2009
-
15. Simulação numérica da migração de elementos metálicos e do monômero -caprolactama de embalagens poliméricas irradiadas para simulantes de alimentos / SIMULATION STUDY OF -CAPROLACTAM MONOMER AND METALLIC ELEMENTS MIGRATION FROM IRRADIATED POLYMERIC PACKAGING INTO FOOD SIMULANTS
For decades migration study of chemical compounds from packaging into food, such as metals, residual monomers and additives, is a very important issue, concerning public health and minimize chemical contamination. In this work, it was done irradiations of packagings taken in contact with food simulant, and it was studied this migration through a mathematical
Publicado em: 2008
-
16. ImplicaÃÃes de fatores ambientais na deposiÃÃo de plÃsticos no ambiente praial de um ecossistema estuarino
Marine debris are materials from anthropogenic sources, such as plastics, paper, glass, wood and others, that enter the marine and coastal environments from multiple sources, and are considered as one of the most important marine pollutants by the turn of the XXI Century. Sandy beaches are usually more studied because they are relatively easy to be monitored
Publicado em: 2008
-
17. Aproveitamento de embalagens cartonadas em compósito de polietileno de baixa densidade. / Re-use of carton packages in low density polyethylene composites.
Plastics materials production has increased to 169 million tons in the world in 2003. A great part of these synthetic polymers, it means 36% in Europe are used in packaging applications. These raw materials are used for a short time and produces a great volume of residues. Even with a great development of residues management, its treatments and elimination c
Publicado em: 2007
-
18. Preparação, caracterização e degradação de blendas de poliestireno e amido termoplástico usando glicerol e óleo de buriti (Mauritia flexuosa) como plastificantes
The great amount of synthetic plastics that are discarded in the environment causes pollution because they are inert against the attack of microorganisms. This fact leads the researches to development biodegradable polymers. Polystyrene (PS) is among the most dominant packaging materials nowadays, however it does not decompose itself. Addition of cassava sta
Publicado em: 2007
-
19. Desenvolvimento e avaliação de filme biodegradável de polietileno incorporado de amido de grão-de-bico (Cicer arietinum L.) / Development and evaluation of biodegradable film of polyethylene incorporated with chickpea starch (Cicer arietinum L.)
The concern with the pollution caused by the great volume of waste plastics in the environment has led to the study of new biodegradable materials. The starch is one of natural polymers with greater potential of application in the development of biodegradable packaging, which is renewable and can be obtained from much variety of crops at low cost. Chickpea i
Publicado em: 2007
-
20. Avaliação do desempenho de embalagens para alimentos quando submetidas a tratamento por radiação ionizante / Evaluation of performance of food packagings when treated with ionizing radiation
In this study the mechanical properties (tensile strength and percentage elongation at break and penetration resistance), optical properties, gas oxygen and water vapor permeability, the overall migration tests into aqueous food simulant (3% aqueous acetic acid) and fatty food simulant (n-heptane), as well as the formation of volatile radiation product tests
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 07/03/2006
-
21. Embalagem ativa para alface americana (Lactuca sativa L.) minimamente processada
As grandes perdas pós-colheita de produtos hortícolas mostram a necessidade da adoção de novas técnicas de conservação. O processamento mínimo destes produtos permite agregar valor à matéria-prima e torna-os conveniente ao consumidor. O objetivo do trabalho foi desenvolver uma embalagem ativa para alface americana (Lactuca sativa L.) minimamente pr
Publicado em: 2006
-
22. Avaliação do teor e da composição quimica do oleo essencial de plantas medicinais submetidas a processos de secagem e armazenamento
In Brazil, the therapeutical use of medicinal plants is increasing each time. Some national and international companies use vegetal raw material in the elaboration of its products, so the commercial cultivation and the improvement of harvest of these species becomes indispensable. The objective of this work was to study post-harvest of two medicinal species
Publicado em: 2005
-
23. Estratégias de cultivo para produção dos plásticos biodegradáveis poli(3-Hidroxibutirato) e poli(3-hidroxibutirato-co-3-hidroxivalerato) por bactérias
Polyhydroxyalkanoates (PHAs) are carbon and energy storage materials that are accumulated as intracellular granules in a variety of microorganisms during unbalanced growth. PHAs have drawn attention due to their properties similar to conventional plastics and complete biodegradability. They can be used for food and cosmetics packaging, and in medicine and ag
Química Nova. Publicado em: 2004-08
-
24. Estudo da degradação de polimeros sinteticos de importancia industrial por linhagens fungicas
This work describes the action of basidiomycetes fungi on the degradability of the four main synthetic polymers used in food packaging: polyethylene terephthalate (PET), polypropylene (PP), polystyrene (PS), polyvinyl chloride (PVC) and another synthetic polymer, a polyurethane foam (PU). The microorganisms were grown in the salts liquid medium, pH 6.8, cont
Publicado em: 2001