ISSN:0894-3214    

DOI:10.1002/pts.2770060602

出版商:John Wiley&Sons, Ltd    

年代:1993

数据来源: WILEY

ISSN:0894-3214    

DOI:10.1002/pts.2770060603

出版商:John Wiley&Sons, Ltd    

年代:1993

数据来源: WILEY

摘要:

AbstractThe aim of the Irish food industry is to produce world class competitive products (WCCPs). Stating the obvious: Food and packaging are inseparable and thus WCCP status is a target also for packaging manufacturers in their own right and also as to how packaging assists food companies to achieve their aims.

ISSN:0894-3214    

DOI:10.1002/pts.2770060604

出版商:John Wiley&Sons, Ltd    

年代:1993

数据来源: WILEY

摘要:

AbstractThe UV methodology previously outlined has been applied to assess the influence of microwave heating on the migrational behaviour of plastics. Because the method indicates the way migration changes as a function oftwhen measured at constant temperature, its exponential relationship as a function of temperature (t) can be evaluated as well. Hence, the behaviour as a function of time while temperature changes are taking place can be calculated.In the current experiments the migrational effects of PET in water were studied as the temperature was raised by microwaves. No influence due the microwaves was found.

ISSN:0894-3214    

DOI:10.1002/pts.2770060605

出版商:John Wiley&Sons, Ltd    

年代:1993

数据来源: WILEY

摘要:

AbstractThe objective of this study was to apply the finite element method (FEM) to modelling the simultaneous oxygen diffusion and chemical reaction in a packaged liquid food. Cylindrical high‐density polyethylene (HDPE) packages, top and bottom insulated, were designed to contain apple juice or water containing vitamin C. Oxygen consumption was monitored by a micro‐oxygen electrode. A first‐order chemical reaction and its reaction rate constant 7.3 ± 10‐3/min (in terms of O2consumption) was determined in apple juice with added vitamin C. The simultaneous permeation‐diffusion reaction process was modelled by finite element block types developed by Swanson Analysis Systems. Inc. Houston, PA (Engineering Analysis Systems User's and Theoretical Manuals). Results indicate that the model generates acceptable predictions for a cylindrical, permeable package and a semi‐infinite system (oxygen‐saturated l

ISSN:0894-3214    

DOI:10.1002/pts.2770060606

出版商:John Wiley&Sons, Ltd    

年代:1993

数据来源: WILEY

摘要:

AbstractThe objectives of this study were to apply the finite element method (FEM) to the computer simulation of oxygen diffusion in a liquid food system contained in a permeable package, and to apply a mathematical lumped method to evaluate the integrity of a permeable package. The cylindrical package (2.425cm radius) was made of polyethylene (2 mil) with solid acrylic at the top and base. A micro‐oxygen electrode was introduced from the top surface, 1.37 cm from the radial wall. Changes in dissolved oxygen were recorded using a data acquisition system. Experimental data were compared to predicted values obtained using a finite element technique computer model (Engineering Analysis Systems Verification and Theoretical Manuals, Swanson Analysis Systems, Inc., Houston, PA). Acceptable predictions were obtained for two systems: a cylindrical permeable package and a semi‐infinite impermeable container. The model can be modified to simulate other geometrical configurations, packaging materials and liquid food syst

ISSN:0894-3214    

DOI:10.1002/pts.2770060607

出版商:John Wiley&Sons, Ltd    

年代:1993

数据来源: WILEY

ISSN:0894-3214    

DOI:10.1002/pts.2770060608

出版商:John Wiley&Sons, Ltd    

年代:1993

数据来源: WILEY

ISSN:0894-3214    

DOI:10.1002/pts.2770060609

出版商:John Wiley&Sons, Ltd    

年代:1993

数据来源: WILEY

ISSN:0894-3214    

DOI:10.1002/pts.2770060610

出版商:John Wiley&Sons, Ltd    

年代:1993

数据来源: WILEY

摘要:

AbstractDuring the past decade, there has been a growing demand for newer types of packaging in Greece. Packaging manufacturers have modernized and expanded their capabilities and developed new high‐technology products which may contribute to improved environmental protection. This review outlines recent developments and trends in Greek packaging usag

ISSN:0894-3214    

DOI:10.1002/pts.2770060611

出版商:John Wiley&Sons, Ltd    

年代:1993

数据来源: WILEY