功能性包装薄膜论略(二)

(上接《塑料包装》2015年第1期)二、功能性包装薄膜(一)蒸镀氧化物型阻隔性包装薄膜1、概述蒸镀氧化物型阻隔性包装薄膜中,蒸镀氧化硅型透明阻隔性包装薄膜,是开发应用比较成功的一个品种,也是二十世纪末期,复合软包装领域中,最引人注目的重大突破之一。蒸镀氧化硅型阻隔性包装薄膜,是透明蒸镀型阻隔型包装薄膜的代表性产品,被塑料软包装界认为是最有发展前途的软包装材料之一。蒸镀氧化硅型阻隔性包装薄膜和镀铝型阻隔     

Mg-PbO2-Ti-PbO2-PTFE复合薄膜烟火材料的制备及性能

采用磁控溅射和真空蒸镀结合的方法,制备了Mg-PbO2-Ti-PbO2-PTFE复合薄膜烟火材料,利用X射线光电子能谱(XPS)分析了真空蒸镀的薄膜成分,并测定了薄膜材料与基底间的附着力.采用光纤法测量薄膜材料的燃烧线速度,分析了其燃烧过程.结果表明,利用真空蒸镀法可得到PbO2薄膜,复合薄膜烟火材料与基底有较好的附着...     

凸版GL薄膜介绍透明、高阻隔性薄膜的世界标准

GL薄膜是凸版专利全球透明高阻隔薄膜市场上的顶级品牌，具有优良的水蒸气和氧气阻隔性能。凸版通过运用多年以来积累的丰富知识又在多种领域对产品进行了应用开发，例如软包装，蒸煮袋，液体包装袋，复合软管以及液体纸容器等，被广泛应用于多种用途。     

可用于高温蒸煮包装的GL薄膜浅析

近年来,随着世界环境保护问题的日益严峻,透明蒸镀薄膜代替PVDC涂层薄膜和铝箔的市场正在逐年扩大,2005年已超过十几亿平方米。日本凸版印刷株式会社（以下简称凸版公司）依靠其独创的蒸镀加工技术,成功地开发了阻隔性和稳定性较强的高阻隔、透明、环保性GL薄膜。     

凸版GL薄膜介绍 透明、高阻隔性薄膜的世界标准

<正>GL薄膜是凸版专利全球透明高阻隔薄膜市场上的顶级品牌,具有优良的水蒸气和氧气阻隔性能。凸版通过运用多年以来积累的丰富知识又在多种领域对产品进行了应用开发,例如软包装,蒸煮袋,液体包装袋,复合软管以及液体纸容器等,被广泛应用于多种用途。凸版G L薄膜的主要特点*优异的阻隔性能(抗氧,防潮,香味保持性)*透明性*由于阻隔性能高,受温度和湿度的影响很小*柔软灵活性(可折叠和抗机械重压)*易于印刷和加工     

铝箔复合软包装材料阻隔性问题研究

对影响铝箔复合软包装材料阻隔性能的因素进行了探讨,指出了关于铝箔复合膜阻隔性的一些误区,对铝箔针孔与铝箔复合材料阻隔性能的关系进行了理论推导,得出了理论公式,并利用公式讨论了BOPP、PE等材料的厚度对铝箔复合材料阻隔性能的影响.文章还对铝箔复合软包装氧气透过率和水蒸汽透过率的检测进行了比较分析,指出了目前测试中存在的一些问题.文章最后还从包装、运输、销售的全过程出发,探讨了包装件全过程的整体阻隔性能.     

日本凸版印刷株式会社开发GL透明膜

GL是go odlayer的简称,也可理解成glasslayer（也称玻璃膜）。是一种透明蒸镀薄膜,可将PET和ONY进行硅和氧化铝进行蒸镀加工,制成具有优异的氧气阻隔性、防潮性、保香性能的透明高阻隔环保薄膜。是日本凸版印刷株式会社（以下简称凸版公司）独创。     

AZO透明导电薄膜的制备技术及应用进展

概述了国内外AZO透明导电薄膜的多种制备技术和开发应用进展。详细介绍了磁控溅射、溶胶-凝胶、脉冲激光沉积、真空蒸镀、化学气相沉积等工艺在AZO薄膜制备中的研究现状,并且在对AZO膜与ITO膜性能比较的基础上,指出AZO薄膜的产业化前景好。     

真空镀二氧化钛聚乙烯塑料包装薄膜

塑料包装薄膜上进行无机氧化物镀层在材料科学领域和包装应用领域都有重要的意义.采用蒸镀、多弧镀和硅油轰击蒸镀3种真空镀膜方法,在聚乙烯塑料包装薄膜上实现了的二氧化钛镀膜.采用扫描电镜、X-射线衍射、气体渗透、透湿性、紫外分光等进行了表征和性能研究.结果表明在聚乙烯塑料包装薄膜上成功实现了二氧化钛镀膜;真空镀二氧化钛聚乙烯薄膜的气体阻隔性能大大提高,其气体透过量约为原聚乙烯薄膜的0.1%～1%;水汽阻隔性也有所提高;并表现出较好的紫外线屏蔽性能.     

铝箔针孔及其对阻隔性的影响

铝箔是采用纯度99％以上的电解铝,经过压延制作而成。铝具有资源丰富、价格低、容易加工等优点,作为包装材料使用时,铝箔是包装材料中唯一的金属基材。铝箔无毒、无味,具有优良的导电性和遮光性,有极高的防潮性、阻气性和保味性,能最有效地保护被包装物,是一种至今尚未能被代替的包装材料。无论是何种蒸镀薄膜,还是涂布的特种薄膜,都不能完全取代铝箔。在现代包装装横领域中,几乎所有要求不透光或高阻隔的复合软包装材料均采用铝箔做阻隔层。金属铝具有高度致密的金属晶体结构,理论上完美的铝箔能完全阻隔任何气体、水蒸气和光线…     

柔性高阻隔薄膜材料的研究现状

目的为柔性高阻隔薄膜的应用提供理论指导。方法综述柔性高阻隔膜的应用现状及存在问题,总结热蒸发、化学气相沉积、原子层沉积等制备柔性高阻隔薄膜的方法、原理、特点及应用,展望高阻隔膜包装材料的发展前景。结果高阻隔薄膜制备工艺趋向于单次制备,采用等离子体辅助原子层沉积技术是制备超高阻隔薄膜的首选,原子层沉积(ALD)和分子层沉积(MLD)结合也是获得超高阻隔薄膜的未来发展方向。结论快速、高效地制备柔性高阻隔薄膜是包装工业的发展趋势。     

Protecting and preserving clear barrier layers for flexible packaging materials In‐line thermal evaporation of organic topcoat layer

The end market for transparent flexible barrier films is larger than for metallized films. Presently, the market is still dominated by polymeric barrier layers but the used chemicals may be harmful for the environment. An alternative would be transparent thin layers deposited by vacuum deposition techniques using reactive processes. Ceramic materials like silicon oxide or aluminum oxide are used having a film thickness of just ～10 nm, a coating uniformity of +/?5% across and along the film at a barrier performance below 2.0 sccm/m²d for oxygen transmission rate (OTR) and below 1.0 g/m²d for water vapor transmission rate (WVTR) on PET substrates. In this paper, details will be provided about the deposition processes for these barrier layers using thermal evaporation, plasma‐assisted thermal evaporation as well as deposition by electron beam evaporation. An important factor for these high barrier transparent coatings is also to withstand the downstream processes in the whole packaging stream like slitting, lamination, printing etc. One solution is to protect the barrier layers by a Topcoat. For example, off‐line deposition of lacquers is used in field but the market penetration is low due to high process and material costs. An in‐situ Topcoat deposition is a smart solution to overcome this issue saving time and costs. Such an approach will be also described in the presentation and the impact on the performance of the final package will be discussed.     

富脂类食品软包装材料设计要点

富脂类食品富含油脂,容易氧化和水解而导致食品酸败变质。为了保护食品不变质,包装材料必须具有隔离食品与氧气、光照、水汽的作用。通过对包装材料的合理设计与检测,能够有效提高富脂类食品的货架期质量,充分发挥包装对内容物的保护作用,提高食品的安全性。本文对食品软包装材料设计的要点进行了介绍。     

液体农药软包装的研究现状及展望

液体农药因含有毒性较大且腐蚀性较强的甲苯、二甲苯等有机溶剂,其软包装材料应具备较强的耐腐蚀性能和阻隔性能。目前国内市场上液体农药软包装常用的材料主要有PET/Al/CPP(或PE)复合膜、PET/VMPET/CPP(或PE)复合膜、含PA或EVOH的PP,PE多层共挤膜、PET/PVDC(或EVOH)/CPP(或PE)透明复合膜等,常用的胶黏剂为聚氨酯胶黏剂。液体农药包装废弃物的处理一般采取随意丢弃和集中填埋焚烧2种方式,均对环境及人类健康危害较大,必须采取相应的措施以降低其危害。液体农药软包装必须朝绿色环保方向发展,研发并推广可降解材料与水溶性膜。     

Comparison of flat film to total package water vapour transmission rates for several commercial food wraps

The barrier properties of a package are the sum of material and seal permeations. Although addressed for hermetically sealed and modified atmosphere packages, little consideration of total package permeation has been given to commercial food wraps. Standard protocols were used to compare the water vapour transmission rates (WVTRs) of materials and packages for seven commercial food wraps: aluminum foil; poly(vinylidene chloride) (PVdC) film; three poly(ethylene) (PE) films; an adhesive‐modified PE film; and plasticized poly(vinyl chloride) (PVC) film. Water ingress for a complete package was compared to calculated material permeation based on film WVTRs. Film‐to‐glass adhesion strength was also measured. Model systems (desiccant) were compared to foods at ambient and refrigeration temperatures. Aluminum foil had the lowest material WVTR (0.10 g/h/m²), closely followed by PVdC (0.13 g/h/m²). These WVTRs were approximately five‐fold lower than the PEs (～0.65 g/h/m²), which were nearly 10‐fold lower than PVC (4.9 g/h/m²). The adhesive‐modified PE film had the lowest difference between material and package transmission rates (0.7 E‐03 g/h), approximately half that of the PVdC film (1.1 E‐03 g/h), which was significantly lower than the remaining films (2.3 E‐03 –3.9 E‐03 g/h). The adhesive PE film had the strongest film–glass adhesion. Ambient food product test results were similar to model system (desiccant) results, but refrigerated trials showed significantly different relative package transmission rates. This was attributed to the reduced adhesion of most wraps at refrigeration temperatures. Copyright © 2002 John Wiley & Sons, Ltd.     

纳米材料在食品包装中的研究进展

目的介绍几种常用纳米材料在食品包装中的应用,总结食品包装中纳米材料的检测技术及表征方法,并对其安全性进行评估。方法介绍纳米银、纳米氧化钛、纳米氧化锌、纳米氧化硅、纳米黏土、纳米分子筛以及其他纳米复合材料在食品包装中的应用,列举食品包装中纳米材料的表征手段,如成像显示技术、色谱质谱技术和光谱分析技术等,并对食品包装中纳米材料的迁移风险和毒理学问题进行探讨。结论纳米材料的存在能有效改善食品包装材料在保鲜效果、抗菌能力以及阻隔性能方面的特性,具有广阔的市场应用前景。此外,食品包装材料的安全性不容忽视,还应加强对食品接触用纳米材料的风险评估体系的研究。     

陶瓷封装电沉积Ni-Co合金的研究

为了使用Ni-Co合金代替Ni作为陶瓷封装电镀金层的底镀层以提高它的抗高温老化能力，系统地研究了从氨基磺酸盐镀液中获得低Co含量Ni-Co合金镀层的规律，研究发现镀层中Co含量随着镀液中Co含量的升高而升高，随着镀液中温度的升高而略有上升，随着电流密度的上升而下降，镀液pH值对镀层中Co含量基本没有什么影响。研究还发现镀层中加入Co能够降低镀层的内应力，但同时引起镀层硬度的上升。推荐在陶瓷封装中使用含15％Co(质量分数）左右的Ni-Col合金镀层来代替Ni作为底镀层。     

氧化纳米纤维素增强再生纤维素全纤维素复合薄膜的制备及性能

以2,2,6,6-四甲基哌啶-氮-氧化物(TEMPO)氧化松木粉纳米纤维素(TOCNs)为增强相、α-纤维素粉制备再生纤维素(RC)为基体,采用溶胶-凝胶法制备氧化纳米纤维素增强再生纤维素(TOCNs/RC)全纤维素复合薄膜。对不同TOCNs添加量下TOCNs/RC全纤维素复合薄膜的力学性能、光学性能、氧气阻隔性能和热稳定性能进行研究,并通过FTIR、SEM、TEM、XRD和流变仪对TOCNs和TOCNs/RC全纤维素复合薄膜的结构、形貌及纤维素溶液流变性能进行表征。结果表明,TOCNs添加量对TOCNs/RC全纤维素复合薄膜的力学性能有显著影响,当TOCNs添加量(与纤维素基体的质量比)为1.0%时,TOCNs/RC全纤维素复合薄膜的拉伸强度和断裂能分别可达134.3 MPa和21.51 MJ·m?3,具有最佳的综合力学性能;TOCNs/RC全纤维素复合薄膜的透光率随TOCNs添加量的增加而下降,雾度随TOCNs添加量的增加而增大,但仍保持较高的透光率(>85%)和较低的雾度(<14%);TOCNs/RC全纤维素复合薄膜还具有优异的氧气阻隔性,TOCNs添加量为1.6%时,其透氧系数仅为1.47×10?17cm3·cm/cm2·s·Pa。TOCNs/RC全纤维素复合薄膜有优于一般塑料薄膜的拉伸强度和氧气阻隔性,并有可媲美于塑料薄膜的透明度,可作软包装复合材料的强度层和阻隔层,在绿色高性能包装材料领域具有广阔的应用前景。      

Influence of packaging material on bread characteristics during ageing

One of the priorities of today's bread‐making industry is to find suitable packaging solutions to satisfy the peculiar requirements of bread, mostly appreciated by Italian consumers for its crispy crust. The packaging material should allow for both rapid heat exchange with the environment and water vapour evaporation to prevent condensation inside the package. Perforated orientated polypropylene (OPP) films are currently the best materials available for satisfying the industry's requirements. Recently, our group demonstrated that bread wrapping with perforated films is efficacious against bread contamination. The aim of this work was to verify whether these types of films could also influence the trend of phenomena related to product ageing. In particular, variations in the moisture inside the loaf during storage and their influence on changes in crumb softness were investigated. Three OPP films and one double‐layer film bag with different hole size characteristics were chosen for this study and their performances were compared with those of a paper bag. Because of the considerable differences in the hole size characteristics, the films showed very different barrier effects to water evaporation. The C250 OPP film (hole mean diameter = 0.54 mm and density = 21.4 holes/cm²) played an interesting role in modulating moisture variations. Wrapping bread in this film enabled both crust crispness and crumb softness to be maintained during 48h of storage. Such performances cannot effectively be obtained by using alternative industrial bread packaging materials, such as paper bags. Copyright © 2006 John Wiley & Sons, Ltd.     

新型塑料软包装的应用及结构设计研究

在市场调研的基础上,根据塑料软包装基材膜的不同应用,分析了自立袋、拉链袋、盒中袋3种结构的薄膜材料,阐述了材料的性能特点,绘制了典型包装结构图。重点介绍了与传统红酒包装结构形式变异较大的BIB(盒中袋)包装,分析了其内袋材料结构及BIB的应用,论述了盒中袋的密封开关形式,设计了其提手式外包装纸箱的结构。