Thermoplastic Injection
Mostrando 1-12 de 15 artigos, teses e dissertações.
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1. Injection Shrinkage аnd Water Sorption of Some Thermoplastic Dental Materials
Abstract Objective: To evaluate the change of diameter of different injection-molded thermoplastic materials. Material and Methods: Four thermoplastic injection-molded materials were analyzed (Bre.flex 2nd edition, Vertex ThermoSens, Perflex Biosens and Polyan IC). A total of 432 test samples were made in the form of an "hourglass". All samples were divide
Pesqui. Bras. Odontopediatria Clín. Integr.. Publicado em: 31/10/2019
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2. Polypropylene Composites Manufactured from Recycled Carbon Fibers from Aeronautic Materials Waste
Carbon fiber composites are used in several industries such as, aerospace, automotive, civil engineering, sports goods and technical applications due to its low-weight, strength and stiffness. However, the technology of recycling of these thermosetting polymer composites remains an engineering challenge because of their cross-linked structures that impede th
Mat. Res.. Publicado em: 23/10/2017
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3. Utilization of banana stalk fiber as reinforcement in low density polyethylene composite
ABSTRACT Natural fibers could serve as viable and abundant alternatives to the expensive and non - renewable synthetic fibers as reinforcement in thermoplastic composites. The potentiality of banana stalk fiber at reinforcing a low density polyethylene matrix was examined in this study. Fibers were extracted from the stalk of banana plant and characterized f
Matéria (Rio J.). Publicado em: 2016-12
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4. Flexible thermoplastic composite of Polyvinyl Butyral (PVB) and waste of rigid Polyurethane foam
This study reports the preparation and characterization of composites with recycled poly(vinyl butyral) (PVB) and residue of rigid polyurethane foam (PUr), with PUr contents of 20, 35 and 50 wt %, using an extruder equipped with a Maillefer single screw and injection molding. The components of the composites were thermally characterized using differential sc
Polímeros. Publicado em: 2015-04
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5. Post-consumer polyethylene terephthalate and polyamide 66 blends and corresponding short glass fiber reinforced composites
Blends of bottle-grade post-consumer polyethylene terephthalate (PET) and virgin polyamide 66 (PA66), over the complete composition range, and corresponding short glass fiber (SGF) reinforced composites were investigated. These materials were compounded in a twin-screw extruder and injection molded as standard specimens. Morphological investigation of the co
Mat. Res.. Publicado em: 16/09/2014
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6. Evaluation of the effect of the incorporation of rubber tire waste particles on the properties of PP, HIPS and PP/HIPS matrices
In recent years, the consumption of plastics has been increasing and as consequence, the waste generated has also increased. Rubber tire (RT) waste is another residue which causes significant problems to society. In view of the considerable amounts of RT waste generated, this study aimed to evaluate the influence of the incorporation of RT particles into pos
Polímeros. Publicado em: 16/04/2013
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7. Evaluation of periapical inflammation response from coronal leakage in dog´s teeth obturated using different resin-based sealers and different obturation techniques / Avaliação da resposta inflamatória periapical resultante da infiltração coronária em dentes de cães obturados com diferentes cimentos resinosos e técnicas obturadoras
Considering the need for three-dimensional obturations and adequate marginal sealing of the radicular canal system as being decisive factors for successful endodontic therapy, this study had as its objective the evaluation of periapical inflammatory responses resulting from coronary infiltration in dogs teeth obturated using different resin sealers (AH Plus,
Publicado em: 2009
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8. Influência dos parâmetros do processo de moldagem por injeção sobre as propriedades mecânicas do poliestireno.
The aim of this work is to study the mechanical properties of the specimen that is made of polystyrene 158K and modeled by thermoplastic injection process. In order to chieve such a goal it was investigeted the variation of the effects in the manufecture process parameters, however it was also analyzed the effects of time and temperature from pos processing
Publicado em: 2009
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9. Processing and characterization of biocomposites of PHB with acetylated and no-acetylate natural fibres of coconut and sisal / Processamento e caracterização de biocompositos de PHB com fibras naturais de coco e sisal acetiladas e não-acetiladas
The problem of urban waste accumulation has increased in recent decades and the large consumption of plastics is one of those responsible for this situation. These materiaIs have the ability to remain in the environment for many years making it difficult further to provide its correct destination. This problem was the main motivation of the work presented he
Publicado em: 2008
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10. Solução de defeitos na moldagem por injeção de termoplasticos / To surface defects on thermoplastic injection moulded parts solution
In this work it was made a rising of the main causes and solutions of the defects that happen in the transformation of polymers for the molding process for injection. The preparation parameters and tuning of the equipments were discussed involved in the process taking into account the project of the product aided by software, as well as types of injection mo
Publicado em: 2007
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11. Avaliação do processamento e propriedades de compósitos de poliuretano termoplástico reforçados com fibras silexil, em comparação com outras fibras/cargas comercialmente utilizadas
The introduction of fibers/fillers in polymers is a common strategy to produce material with enhanced properties and low densities for applications such as in the automobile industry. In this work, a novel kind of an inorganic short fiber (Silexil), obtained from mineral resources, was characterized and applied as a reinforcing agent in thermoplastic polyure
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 23/09/2004
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12. Heat flux canals (HFC) technique: an alternative to cool down stereolithography moulds
The design of injection mould inserts obtained by stereolithography (SL) has various recommendations that are based on experimental work done by researchers over the last decade. There are no final conclusions about the best cooling technique for SL inserts. Moreover, no criteria are presented concerning structural and thermal designs based on stress-strain
Journal of the Brazilian Society of Mechanical Sciences and Engineering. Publicado em: 2003-09