Plastic packaging materials for food [[electronic resource] ] : barrier function, mass transport, quality assurance, and legislation / / edited by O.-G. Piringer and A.L. Baner

• Record Nr.: UNISA996212587403316
• Pubbl/distr/stampa: Weinheim ; ; New York, : Wiley-VCH, c2000
• ISBN: 1-281-76412-4; 9786611764128; 3-527-61328-5; 3-527-61329-3
• Descrizione fisica: 1 online resource (608 p.)
• Altri autori (Persone): PiringerO.-G (Otto G.); BanerA. L (Albert Lawrence)
• Disciplina: 664.09
• Soggetti: Food - Packaging; Plastics in packaging
• Lingua di pubblicazione: Inglese
• Formato: Materiale a stampa
• Livello bibliografico: Monografia
• Note generali: Description based upon print version of record.
• Nota di bibliografia: Includes bibliographical references and index.
• Nota di contenuto: Plastic Packaging Materials for Food; Contents; 1 Preservation of quality through packaging; 1.1 Quality and shelf life of food; 1.2 Physical and chemical interactions between plastics and food; 1.3 Organization of the book; 2 Characteristics of plastic materials; 2.1 Classification, manufacture and processing aids; 2.1.1 Classification and manufacture of plastics; 2.1.2 Processing aids; 2.2 Structure and states of aggregation in polymers; 2.2.1 Structure; 2.2.2 States of aggregation; 2.3 The most important plastics; 2.3.1 Thermoplastics; 2.3.2 Thermosets; 2.3.3 Polyurethanes; 2.3.4 Natural and synthetic rubber2.3.5 Silicones; 2.3.6 Plastics based on natural polymers; 2.3.7 Coatings; 3 Additives for plastics and their transformation products; 3.1 Additivs for plastics; 3.1.1 Introduction; 3.1.2 Nucleating agents; 3.1.3 Lubricants; 3.1.4 Antistatic agents; 3.1.5 Blowing agents; 3.1.6 Plasticizers; 3.1.7 Stabilizers; 3.1.8 Antifogging agents; 3.1.9 Dyes and pigments; 3.1.10 Fillers and reinforcing agents; 3.2 Transformation products of plastics stabilizers; 3.2.1 Introduction; 3.2.2 Cyclohexadienones and quinone methides from phenolic ; antioxidants and UV absorbers; 3.2.3 Products from hydroperoxide decomposing antioxidants3.2.4 Products from hindered amine stabilizers; 3.2.5 Products from heat stabilizers for PVC; 3.2.6 Conclusions; 4 Partition coefficients; 4.1 Thermodynamic fundamentals; 4.1.1 Equilibrium between different phases in ideal solutions; 4.1.2 Non-ideal solutions; 4.1.3 Partition coefficients for systems with polymers; 4.2 Additive molecular properties; 4.3 Estimation of partition coefficients; 4.3.1 The regular solution theory; 4.3.2 UNIFAC; 4.3.3 The retention index system; 4.4 Expected orders of magnitudes for partition coefficients; 5 Models for diffusion in polymers5.1 Diffusion in polymers - The classical approach; 5.1.1 Diffusion in rubbery polymers; 5.1.2 Diffusion in glassy polymers; 5.2 Diffusion in polymers - The computational approach; 5.2.1 Molecular dynamics; 5.2.2 The transition-state approach; 5.3 Conclusions; 6 Prediction of diffusion coefficients in gases, liquids, amorphous solids and plastic materials using an uniform model; 6.1 Introduction; 6.2 Interaction model; 6.2.1 Model assumptions; 6.3 Prerequisites for diffusion coefficients; 6.3.1 Critical temperatures of n-alkanes; 6.3.2 Critical compression factor6.3.3 The entropy of evaporation; 6.3.4 The reference temperature; 6.4 The diffusion coefficient; 6.4.1 Diffusion in gases; 6.4.2 Diffusion coefficients in the critical state; 6.4.3 Diffusion coefficients in amorphous solids; 7 Transport equations and their solutions; 7.1 The transport equations; 7.1.1 The terminology of flow; 7.1.2 The differential equations of diffusion; 7.1.3 The general transport equations; 7.2 Solutions of the diffusion equation; 7.2.1 Steady state; 7.2.2 Nonsteady state; 7.2.3 Diffusion in a single phase homogeneous system; 7.2.4 Diffusion in multi-phase systems
• Sommario/riassunto: Plastics have developed into the most important class of packaging materials. Their relative impermeability for substances from the surroundings has great influence on the shelf life and the quality of the packed goods. At the same time the interaction between the contents and the various components of the packaging plays a decisive role.This particular book is indispensable in the search for the optimal plastic packaging. It facilitates the estimation of the influence on the goods which come from the surroundings and from the packaging. The authors do not restrict themselves only to the d