略论阻隔性软包装材料

分析了发展阻隔性包装材料的重要意义,以及阻隔性包装材料的表征与分类,介绍了环境条件对阻隔性软包装材料阻隔性的影响。以阻隔性包装薄膜在肉类包装方面的应用为例,介绍了阻隔性软包装材料在人们生活中的应用。最后介绍了阻隔性包装薄膜的新秀——吸氧型阻隔性包装薄膜的基本情况。     

Recent Advances in Lipid Derived Bio-Based Materials for Food Packaging Applications

The utilization of lipids is presently in the spotlight of food industry as they are one of novel renewable and sustainable raw materials. Lipids derived materials are considered as a promising alternate to petro-based polymers as they are sustainable, biorenewable, biodegradable, and environmentally benign. These unique attributes draw the attention of scientific community for the use of lipids in food packaging applications with a potential to compete with fossil fuel derived polymers. This paper reviews recent advances in the use of lipids and their effect on the barrier, antimicrobial, antioxidant, and mechanical properties of films, coating and nanocomposites for food packaging applications. Modification of lipids and its chemical interactions with other biopolymers during processing for the synthesis of different materials are also discussed. Global patents and research trend in use of lipids for the preparation of biocomposites are also described. The role of lipids in the circular economy is highlighted and life cycle assessment of lipids derived products is outlined with examples. The review is concluded with synoptic view of existing and forthcoming potential use of lipids in various food packaging applications.     

软包装复合膜用PU胶粘剂的进展简况

本文简单介绍了软包装复合膜及其复合膜用胶粘剂的发展概况。分别叙述了溶剂型、无溶剂型和水性聚氨酯胶粘剂在软包装复合膜工业中的应用状况。     

Palm oil deodorizer distillate as toughening agent in polylactide packaging films

Polylactide (PLA) is the most used biodegradable and biobased food packaging polymer for rigid containers and films. However, its low ductility is a hurdle for increasing its applications in flexible food packaging. A solution is the use of additives. Palm oil deodorizer distillate (PODC) is revealed to be an excellent additive promoting PLA ductility. PODC is a by‐product of vegetable oil refining, which is available in stable quality and in sufficient amounts. Amorphous PLA/PODC blends had an elongation at break of around 130% and that of semi‐crystalline blends was still around 55% compared to the initial 5% of neat PLA. At the same time the PLA rigidity and high glass transition temperatures were kept. PODC was also a very efficient processing aid, allowing for film blow extrusion. The blends were stable in properties during six months without exudation. They complied with legal norms of Food Contact Materials (EU 10/2011) and induced no sensorial alteration of packed food. Therefore PODC is a very interesting alternative to common plasticizers for the production of flexible PLA packaging films. © 2016 Society of Chemical Industry     

Pullulan‐based films and coatings for food packaging: Present applications,emerging opportunities,and future challenges

Societal and industrial demands for lower environmental impact, cost effectiveness, and high‐performance goods and services are increasingly impacting the choice of technologies which are developed and deployed in consumer products. Like many other sectors, food packaging is moving to new technologies; the use of biopolymers is one of the most promising strategies toward an optimized use of traditional packaging materials (e.g., oil‐based plastics) without impairing the goal of extending shelf life. Among other food packaging materials, pullulan is attracting much attention due to its unique features. The goal of this review is to provide an overview of current and emerging applications of pullulan within the food packaging sector. In particular, the functional properties of interest for the food packaging industry will be discussed in light of the physicochemical attributes of this exopolysaccharide. Future challenges that may dictate the successful penetration of pullulan in the food packaging market are also outlined. © 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014 , 131, 40539.     

淀粉/聚乙烯醇活性包装薄膜及其在食品包装应用中的研究进展

综述了淀粉/聚乙烯醇（PVA）活性包装薄膜及其在食品包装中的研究进展，主要对从不同比例共混、疏水改性、增强改性等方面对淀粉/PVA薄膜的改性研究，从功能特性和活性物质对薄膜性能的影响2个方面对淀粉/PVA活性薄膜研究和薄膜在食品包装中的应用3个方面进行了归纳总结，旨在为以淀粉/PVA为基材的活性包装薄膜研究提供参考。     

Novel Bio-Based Materials and Applications in Antimicrobial Food Packaging: Recent Advances and Future Trends

Food microbial contamination not only poses the problems of food insecurity and economic loss, but also contributes to food waste, which is another global environmental problem. Therefore, effective packaging is a compelling obstacle for shielding food items from outside contaminants and maintaining its quality. Traditionally, food is packaged with plastic that is rarely recyclable, negatively impacting the environment. Bio-based materials have attracted widespread attention for food packaging applications since they are biodegradable, renewable, and have a low carbon footprint. They provide a great opportunity to reduce the extensive use of fossil fuels and develop food packaging materials with good properties, addressing environmental problems and contributing significantly to sustainable development. Presently, the developments in food chemistry, technology, and biotechnology have allowed us to fine-tune new methodologies useful for addressing major safety and environmental concerns regarding packaging materials. This review presents a comprehensive overview of the development and potential for application of new bio-based materials from different sources in antimicrobial food packaging, including carbohydrate (polysaccharide)-based materials, protein-based materials, lipid-based materials, antibacterial agents, and bio-based composites, which can solve the issues of both environmental impact and prevent foodborne pathogens and spoilage microorganisms. In addition, future trends are discussed, as well as the antimicrobial compounds incorporated in packaging materials such as nanoparticles (NPs), nanofillers (NFs), and bio-nanocomposites.     

Selected Applications of Chitosan Composites

Chitosan is one of the emerging materials for various applications. The most intensive studies have focused on its use as a biomaterial and for biomedical, cosmetic, and packaging systems. The research on biodegradable food packaging systems over conventional non-biodegradable packaging systems has gained much importance in the last decade. The deacetylation of chitin, a polysaccharide mainly obtained from crustaceans and shrimp shells, yields chitosan. The deacetylation process of chitin leads to the generation of primary amino groups. The functional activity of chitosan is generally owed to this amino group, which imparts inherent antioxidant and antimicrobial activity to the chitosan. Further, since chitosan is a naturally derived polymer, it is biodegradable and safe for human consumption. Food-focused researchers are exploiting the properties of chitosan to develop biodegradable food packaging systems. However, the properties of packaging systems using chitosan can be improved by adding different additives or blending chitosan with other polymers. In this review, we report on the different properties of chitosan that make it suitable for food packaging applications, various methods to develop chitosan-based packaging films, and finally, the applications of chitosan in developing multifunctional food packaging materials. Here we present a short overview of the chitosan-based nanocomposites, beginning with principal properties, selected preparation techniques, and finally, selected current research.     

A computer‐aided methodology to design safe food packaging and related systems

A specific “Failure Mode, Effects, and Criticality Analysis” (FMECA) methodology has been developed to detect substances, materials, and steps that are critical for the safety of packaging systems used in food contact and related applications. Contamination levels in the finished product beyond acceptable thresholds are screened via a systematic analysis of crossed mass transfer between components and a serialization of mass‐transfer instances during product lifetime. The whole framework, including physical modeling and expert systems, has been integrated within the open‐source simulation software FMECAengine. The whole approach is illustrated on three case studies representative of applications along the food packaging supply chain: (1) identification of critical routes of the contamination by printing ink constituents, (2) concurrent engineering of multipurpose packaging, and (3) application to surveys or control plans. The implementation of this framework within industrial commitments such as compliance with EU regulations and ISO 22000 type food safety management systems is discussed. © 2013 American Institute of Chemical Engineers AIChE J, 59: 1183–1212, 2013     

The Dilemma of flexible PVC from an independent compounder's perspective

Flexible PVC compounds produced by the Plastics Division of Teknor Apex are used in most major end-use markets. Our materials are molded and extruded for applications in wire and cable, automotive, medical, building and construction, appliances, toys, food packaging, housewares, power tools, recreational products, and many other industries. This involvement with diverse markets gives us a wideranging perspective on attitudes towards flexible PVC among people involved in product design, material specification, purchasing, sales and marketing, processing, and other important functions at corporations large and small. “The Dilemma of Flexible PVC” reflects what we see, from our conversations and business dealings with these customers, as a critical crossroads for the material. On the one hand, we see many new opportunities for greater market penetration by flexible PVC because of dynamic new product development in the industry and continuing cost/performance advantages compared to other thermoplastics. On the other hand, we are hearing escalating concerns from the marketplace about the environmental friendliness and safety of flexible PVC that may threaten these opportunities. These negative attitudes toward PVC are certainly not new, but we are hearing them with increasingly greater frequency. They are coming from design engineers and other material specifiers developing new applications, and from people involved in long-standing flexible PVC applications.     

Wechselwirkungen zwischen Lebensmittel und Verpackung

Interactions between food and packaging. The main criterion for optimizing packaging is to minimize the migration of compounds present in the packaging into the food. This article describes the physicochemical basis of possible migrations in the order of increasing complexity and the principal chemical interactions. The legal consequences of these interactions for the quality assurance of food and for consumer protection are briefly discussed. A guiding principle of food packaging is that the properties of the food and its packaging must be optimally coordinated.     

为食品包装增色添彩的K-树脂

薄膜是食品包装的主要物料。菲利浦公司生产的 k-树脂 (苯乙烯 -丁二烯共聚物 )是一种透明族树脂 ,具有很好的抗冲击、抗拉强度和光学性 ,适宜制造薄膜。这种材料的出现 ,拓宽了食品包装市场。现时有不少食品及糖果制造商都采用由 k-树脂制成的薄膜。本文介绍这种薄膜性能和应用     

Mathematical analysis of transport properties of polymer films for food packaging. VI. Coupling of moisture and oxygen transport using langmuir sorption isotherms

Deterioration of food products stored in flexible packaging materials can be attributed to the presence of both water and oxygen in the environment surrounding the food. Mathematical models for the simultaneous permeation of moisture and oxygen through the packaging polymeric film and subsequent adsorption on the food surface are presented for the case of competitive adsorption of the two diffusing species. These models are then used to predict internal packaging conditions over time for selected food products. Oxygen and moisture permeation are treated as independent phenomena, and the competition is regarded as occuring on a surface described by the Langmuir adsorption isotherm. It is found that for certain polymer physical properties and relative surface coverages, water and oxygen molecules can dislodge each other from the food surface and, even for situations where the initial partial pressure of oxygen is less than the external partial pressure, can cause an outward flow of the more weakly adsorbed material. This theory is then extended to incorporate varying external conditions of storage.     

New production technologies and applications of poly(vinyl alcohol) film

The following aspects of the manufacture, properties and applications of biaxially oriented poly(vinyl alcohol) (PV-OH) films are discussed: selection of starting PV-OH; method of production by successive biaxial orientation: technical aspects of production; characteristics and applications of the film. Biaxially oriented PV-OH films have good antistatic properties, good thermal resistance, oil and solvent resistance, and excellent gas barrier properties, and are used in food packaging applications. The following aspects of the manufacture, properties and applications of poly(vinyl alcohol) film produced by a blown film technique are discussed: selection of starting PV-OH; process for the production of hot-water-soluble (HWS) film; technical aspects of film production; characteristics and applications of the film. Blown films, which are hot-water-soluble, are produced in tubular form, for conversion into disposable laundry bags.     

CAI在《食品包装学》上的应用

深入论述了食品包装学课程教学内容的特点。结合食品包装教学的实践,对CAI在食品包装学教学中的作用及应用中要注意的问题进行了阐述。以期使CAI课件与食品包装学教学能有机的结合,提高食品包装学的教学效果和教学质量。     

食品包装材料--塑料薄膜的发展

简述了近几年食品包装材料—塑料薄膜的发展,通过分析各种食品的特性,选择最能满足该食品要求的包装材料,介绍了几种具有特殊功能的食品包装材料,指出今后我国塑料包装材料的发展方向。     

聚羟基脂肪酸酯的合成和应用研究进展

介绍了聚羟基脂肪酸酯(PHA)的合成方法，重点讨论了微生物合成法、碳源、化学合成、分离方法及降低PHA生产成本的方法，介绍了PHA的性能及其改性研究，论述了PHA在生物医学、农业、电子、食品包装等领域的应用。     

Mathematical analysis of transport properties of polymer films for food packaging. II. Generalized water vapor models

Deterioration or spoilage of dehydrated food products stored in flexible packaging materials depends on the partial pressure of water vapor in the environment of the stored food. Mathematical analysis of the diffusion of water vapor through semipermeable polymer films using Nernst-Planck equations is combined with non-liner water sorption isotherms on food to establish criteria and optimum conditions for storage stability of dehydrated food. Langmuir, Brunauer-Emmet-Teller (BET), Halsey, Oswin and Freundlich isotherms are used for various ranges of water activity. It is shown that a single parameter, the permeability-sorption constant, based on the physical properties of the polymer and the sorptive properties of the food, accounts for both diffusion and adostption and can be used to accurately determine maximum storage times and can be used to accurately determine maximum storage times and to optimize the selection of packaging films. The theory is extended to thermodynamically compatible solute-polymer systems, where the polymer film is swollen appreciably by the diffusing species.     

REVIEW OF ZEOLITES AS DEODORANTS FOR POLYETHYLENE RESINS USED IN FOOD PACKAGING APPLICATIONS

The formation of odoriphores in polyethylene (PE) is of concern to industries involved in the packaging of items such as foodstuffs and pharmaceuticals that are sensitive to organoleptic contamination. Hitherto, traditional strategies such as increasing the level of antioxidant, reducing contact between the resin and oxygen during processing, optimizing processing conditions, and reducing substances that promote degradation during polymerization, have all been used to reduce odorous volatile organic compounds to some extent. Lately, there has been an interest in zeolites for this purpose. This article reviews the use of zeolites as deodorants in PE resins. The use of zeolites as adsorbents of ripening and degradation products and as antimicrobial agents in food packaging applications is also discussed. In addition, the effects zeolites have on the physico-mechanical properties of PE are considered.     

Polylactide films produced with bixin and acetyl tributyl citrate: Functional properties for active packaging

Packaging materials are decisive to preserve the quality and nutritional value of food. Polylactide (PLA) is a biodegradable polymer with adequate mechanical properties for packaging applications, but its moderate oxygen barrier properties and high UV light transmission hamper its performance as packaging for oxygen- and light-sensitive products. Bixin, a carotenoid with coloring and antioxidant character, was used to improve the light barrier of PLA films plasticized or not with acetyl tri-butyl citrate (ATBC). The films were subjected to thermal treatment mimicking polymer processing temperatures. Despite more than 74 wt% of bixin degraded during heat treatment, films were still blocking up to 95% of UVA and 90% of UVB transmission. Plasticizing PLA with ATBC accelerated up to six times the bixin release into a food simulant, which allowed to reach relevant concentrations for food preservation. In conclusion, bixin is a promising natural antioxidant and UV-shielding additive of biodegradable packaging.