蒸镀氧化铝、氧化硅型高阻隔性包装薄膜

阻隔膜材料因优异的阻隔性能在食品、药品、日化、电子等产品包装等领域具有广泛的应用,本文简要介绍了多种高阻隔材料,详细论述了蒸镀氧化铝、氧化硅型高阻隔性膜进程、技术工艺、阻隔性能及原理和应用。     

复合膜透气性测试中应注意的若干问题

许多高阻隔性材料在单独使用时都会存在一些缺点，如价格昂贵、阻隔性能对水敏感、透明性差、以及制膜后机械强度低等。尽管高阻隔性材料的使用是近几年加速薄膜应用发展的主要原因之一．但是要取代传统的高阻隔性材料（如金属、玻璃）就必须有效地控制它的制造成本并加强它的机械强度。将高阻隔性材料作为多层复合膜中的一层，其它层材料的保护可有效提高它的适用性，并降低了整体的制造成本。     

植物精油对草莓保鲜效果的影响研究

研究了常温条件下植物精油对草莓保鲜效果的影响。选取2种薄膜(高透氧量的PE薄膜和高阻隔性复合薄膜,分别记为FA膜与FB膜),设置5组试验(空白组,FA膜组,FB膜组,添加精油的FA膜组,添加精油的FB膜组),定期对草莓进行感官评价,并测定其可溶性固形物含量、失重率及Vc含量等技术指标。结果表明,在常温条件下,添加植物精油在一定程度上有利于草莓的保鲜,可以延长草莓的货架寿命;高阻隔性复合薄膜(FB膜)与精油联合应用的保鲜效果较好,是草莓保鲜包装较为有效的方式。     

新型高阻隔性包装材料——GT薄膜

近年来,国际上出现了一种新型高阻隔性包装材料镀膜材料,它是以PET膜为基材,在其表面沉积SiOx蒸汽而形成的一种高阻隔性透明包装薄膜,简称GT薄膜.由于使用了SiOx这种制造玻璃的成分,所以GT薄膜也被称为"软玻璃".目前,这种包装材料在美国、日本、欧洲等国家的商品包装中已经得到广泛应用.     

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。     

俄罗斯Danaflex扩产包装膜瞄准欧盟市场

据悉俄罗斯最大的软聚合物膜生产厂之一Danaflex公司准备启动新聚合物膜生产线装置，生产高阻隔性聚合物薄膜，新装置位于莫斯科以东大约700km的Kazan的Himgrad技术园区。     

PVA可降解/高阻隔及其制备研究

为了达到阻气以延长食品保质期的目的,我们需要开发具有高阻隔性的包装材料,又考虑到"白色污染"问题,此包装材料应当具备一定的可降解性。聚乙烯醇(PVA)不仅具有优异的高阻隔性,也具备良好的可降解性。本文对PVA膜的这两种性能及其改性进行了相关介绍,讨论了PVA成膜的溶液流延法和挤出吹膜成型法及其影响因素,最后对PVA的应用进行了展望。     

新型高阻隔性包装材料--GT薄膜

近年来,国际上出现了一种新型高阻隔性包装材料——镀膜材料,它是以PET膜为基材,在其表面沉积SiOx蒸汽而形成的一种高阻隔性透明包装薄膜,简称CT薄膜。由于使用了SiOx这种制造玻璃的成分,所以GT 薄膜也被称为“软玻璃”。目前,这种包装材料在美国、日本及欧洲等国家和地区的商品包装中已经得到广泛应用。     

耐水改性聚乙烯醇涂布膜的研究进展及发展前景

耐水改性聚乙烯醇涂布膜是一种绿色环保的高阻隔包装材料。其特点是:疏水性、氧气阻隔性优良,对环境友好,与PVDC涂布膜相比,性价比高。该产品符合国家的产业政策发展方向,前景乐观。     

真空镀膜在高阻隔性包装材料上的应用

高阻隔性包装材料在食品、饮料、生鲜、药品、电子产品、化工等行业具有广泛的应用。真空镀膜技术生产制备高阻隔陶瓷膜包装材料是近期全球包装材料工业的热点,本文将简要介绍市场上主要的高阻隔性包装膜产品,并对真空镀膜方法生产高阻隔性包装材料的相关工艺技术进行了详细的探讨。     

聚偏二氯乙烯胶乳涂覆纤维纸的应用研究

用纤维纸作ＰＶＤＣ胶乳涂覆型包装材料的基材具有与以塑料为基材的涂覆膜相同的包装。根据测试的各种技术指标,认为ＰＶＤＣ／纤维纸可作为一种新型的高隔包装材料。     

ZnO 薄膜包装材料溅射制备工艺与阻隔性能研究

目的为了解决普通聚合物包装塑料对水、氧的阻隔能力不足,以及包装内容物货架时间短等问题,研究氧化锌(ZnO)沉积复合薄膜制备工艺与阻隔性能之间的关系,探索其应用于包装材料的可行性。方法采用射频磁控溅射技术(RF),以ZnO为靶材,在PET塑料表面沉积制备氧化锌薄膜包装材料,并详细分析射频溅射功率、沉积时间与工作气压对ZnO复合薄膜微观形貌、沉积速率以及阻隔性能的影响。结果当溅射功率为150 W,沉积时间为30 min,工作气压为0.8 Pa时,ZnO薄膜均匀且致密,阻隔能力最强,其氧气透过率(OTR)降低为1.23 m L/(m2·d),水蒸汽透过率(WVTR)降低为0.382 g/(m2·d)。与相同厚度下的PET原膜相比,所制备的ZnO高阻隔薄膜的透氧率降低了49.5倍,透湿率降低了17.6倍。结论射频溅射参数通过影响复合薄膜的微观形貌、致密程度、沉积速率以及沉积层厚度等方面对其阻隔能力会产生较大影响。     

盐雾试验对PE基真空包装材料阻隔性能的影响

目的获得盐雾环境下PE基包装材料阻隔性能的变化规律。方法考察盐雾试验前后4种PE基包装材料的氧气透过率、水蒸气透过率以及包装膜表面形貌变化情况。结果真空包装技术使聚乙烯包装膜、PE高阻隔包装膜和镀铝高阻隔包装膜等3种包装膜的氧气透过量和水蒸气透过量均有增加,而增强型高阻隔包装膜的氧气透过量和水蒸气透过量均有较大下降。结论 PE基高阻隔包装膜能适应于盐雾环境下装备器材的真空长效包装。     

Technofunctional Properties of Films Made From Ethylene Vinyl Acetate/Whey Protein Isolate Compounds

One challenge faced by the plastics industry is that crude oil will become scarcer and more expensive in the future. Furthermore, an increase in plastic waste is leading to a strongly growing demand for sustainable alternatives to traditional, crude oil‐based polymers in the packaging sector. The aim of this study was to investigate the influence of the incorporation of whey protein isolates (WPIs) on the technofunctional properties of ethylene vinyl acetate (EVA) films. The compounding EVA with WPI was conducted in a co‐rotating twin‐screw extruder at varying processing temperatures. WPI and hydrolysed WPI with a degree of hydrolysis of 10% were used up to 35% (w/w) as filler. The tensile strength and elongation at break of the resulting EVA‐based films decreased significantly with increasing filler content. Because of the hydrophilicity of WPI, the water vapour permeability of the films increased. Advantageously, the oxygen barrier was enhanced by 50–80% compared with that of pure EVA films, which offered the potential of using whey proteins as a filler in compounds for packaging materials for their oxygen barrier properties. In addition, this study provides a promising perspective on the thermoplastic processing of whey protein formulations in the future. Copyright © 2013 John Wiley & Sons, Ltd.     

改性木质素/PBAT复合包装膜的研究

目的 将硅烷化木质素（SAL）与聚己二酸/对苯二甲酸丁二酯（PBAT）共混制备包装性能更为优良的SAL/PBAT复合包装膜,使其在包装领域应用更广。方法 通过对木质素进行硅烷化改性,以咪唑作为中间体,将叔丁基二甲基氯硅烷（TBDMSCl）接枝到木质素的羟基上制备SAL,并将SAL与PBAT进行熔融共混吹塑成膜,探讨其对包装膜的力学和阻隔等性能的影响。结果 与纯PBAT膜相比,SAL/PBAT复合包装膜拉伸强度提高了31.0%,断裂伸长率降低了37.4%,弹性模量提高了529.7%,氧气透过率降低了39.4%,水蒸气透过率降低了42.4%。结论 改性木质素与PBAT复合能够产生协同效应,可以有效改善SAL/PBAT复合包装膜的力学和阻隔性能。     

阻隔性塑料包装薄膜的发展

阐述了塑料包装薄膜的功能化发展趋势。从目前国内发展较快的阻隔性塑料包装薄膜方面，对比分析了各种阻隔性树脂材料的特点，以及阻隔性塑料包装薄膜生产工艺技术的最新发展。     

食品包装用壳聚糖薄膜的研究进展

目的旨在通过系统综述壳聚糖性质、壳聚糖薄膜制备方法,以及壳聚糖薄膜在食品包装上应用的国内外研究成果,为开发可降解性、抗菌性、抗氧化性、阻隔性能以及力学性能均较优秀的壳聚糖食品包装膜提供方法指导。方法综述壳聚糖性能特点、壳聚糖食品包装膜的制备工艺和影响壳聚糖食品包装膜性能的各种因素,重点探讨国内外壳聚糖食品包装的研究现状。结果向成膜配方中添加蛋白类、酚类以及其他天然提取物等助剂,可改善壳聚糖复合膜的物理力学性能、阻隔性能、抗氧化性能以及抗菌性能。结论壳聚糖基于自身的可降解性和抗菌性,在食品包装膜领域具有良好的发展和应用前景,但就目前的研究成果以及壳聚糖复合膜实际应用过程中出现的问题来说,壳聚糖食品包装膜在生产工艺、综合性能等方面还有待提高。     

Effects of High Pressure Treatments on Polymeric Films for Flexible Food Packaging

Effects of high pressure (HP) treatments on functional and morphological properties of commercial packaging films have been investigated, to assess their suitability for use in these processes. Experimental analyses have been performed on packaging films, used to make pouches containing four different types of food simulants, after HP pasteurization and sterilization treatments at 200, 500 and 700 MPa. The investigated polymeric flexible packaging structures were single layer as well as bilayer films. Effects of treatments on structural/morphological properties (i.e. crystallinity and density) and on thermodynamic and barrier properties were addressed. Quite all the investigated films were found to be suitable for HP pasteurization, which only determined a negligible effect on the glass transition temperatures and on density of the amorphous regions of some polymeric materials, without a significant effect on functional properties of the packaging. Only bilayer structures including metalized polyethyleneterephthalate were not able to withstand processing conditions because of an extensive delamination accompanied by loss of metallization layer. Conversely, in the case of HP sterilization, combined effects of HP and relatively high temperature caused significant modifications in some of the packaging materials, even those not including a metalized film. In particular, localized delamination occurred in the case of bilayer structures made by laminating polyethyleneterephtalate with linear low density polyethylene or with polypropylene. Films obtained by laminating cast polyamide and bioriented polyamide with polypropylene displayed no evidence of delamination. In the case of films not displaying delamination, only limited changes in gas and vapour barrier properties were detected. Copyright © 2014 John Wiley & Sons, Ltd.     

聚乳酸/酯化纤维素纳米晶体共混膜性能研究

以聚乳酸（PLA）为基体,酯化纤维素纳米晶体（ECNC）为添加剂,制备了PLA/ ECNC共混膜。探讨了原始纤维素纳米晶体（CNC）与ECNC对PLA膜的透光率、表面形貌、热稳定性、亲疏水性及力学性能的影响。结果表明,与CNC相比,ECNC与PLA的相容性提高,透光率、热稳定性及力学性能也显著增强;经酯化的纤维素纳米晶体能降低CNC的亲水性,从而增强与PLA的界面黏合力,使CNC在PLA共混膜中的质量分数由小于1%提高到5%。该PLA/ECNC共混膜在包装塑料领域具有潜力,为制备出性能更加优良的可降解包装用塑料提供了一种简单可行的方法。     

Plasmavorbehandlung und Beschichtung von Kunststoffolien. Teil 1: Beschichtung von unbehandelten Kunststoffolien

Plasma Pretreatment and Coating of Polymer Films. Part 1: Coating of Non-treated Polymer Films The food packaging industry demands cheap polymer films possessing a high barrier against permeation of gases, moisture and flavor. Candidates for the most successful materials fulfilling these requirements are vacuum web coated biaxial oriented polypropylene (BOPP) films containing a thin inorganic barrier layer. For a good adhesion of the barrier layer on the BOPP films, the polymer film must be pretreated. The industry uses the Corona atmosphere plasma. This work is separated in three parts. The first part describes the experimental setup and the properties of vacuum web coated layers on polymer films. The next part contains the results of the systematic modification of polymer surfaces by atmosphere and low pressure plasmas. The influence of the surface properties on the final functionality of the coated films is given. In the last part, the discussion of the results of the first and second part reveals systematic relations between the production parameters of the high barrier films and their final functionality. These results firstly reveal the adhesion mechanism of the inorganic barrier layers of the polymer films and the necessary surface properties of the polymer films, in order to get cheap high barrier films by vacuum web coating.