优异的机械和光学性能,抗焊接和穿孔,防雾,单层或多层,实用,重量轻,适用于冷冻和微波蒸煮,可重复密封:柔性包装主导食品行业。
凭借90%的份额,柔性包装覆盖大部分包装的食品和饮料行业。它们包括复合袋,典型的芯片或小吃,谷物或咖啡的袋子,或用于包装腌制的肉类和奶酪,以及用于果汁和甜食包裹的可重复的挤压垫袋,等等。使大多数使用灵活包装的食品是烘焙食品和意大利面,特别是由于工业和冷冻新鲜意大利面的含量较高,其次是牛奶和乳制品(奶酪,分为部分和预包装,酸奶,黄油)。部分包装的冷肉类销售增加,直接由工业生产商或现代零售商以及加工的肉类预先包装,也推动了柔性包装的进一步推动。它们甚至经常在深冷产品的部门中使用,适用于第四级产品和准备好的膳食,每当需要保护气氛。灵活的复合材料套餐显示了保存脉冲,番茄产品的正增长率(Ho.Re.ca.)扇区,水产养殖起源的酱油和鱼类产品。正在使用不同类型的包装材料,例如:塑料薄膜,塑料袋和袋,塑料收缩和拉伸薄膜,纸标签,纸和铝包装。他们的广泛使用率是以运输的便利性,保护包装的商品,视觉冲击和吸引力由现代印刷系统(RotoGravure和Flexography)提供的能力。柔性包装市场的进一步发展将大量取决于特定食品的增长趋势,如准备膳食,单剂量包装,冷冻和第4系列产品。在过去的几年中,意大利人的营业额的营业型柔性包装产品的供应商录得强劲的增长趋势,特别是对美国和非欧盟国家的出口。 An additional drive may be created by the markets of Africa and China, still offering high penetration margins, unlike the Italian and EU market, which are mature. Within the EU, the largest users of flexible packaging materials are Germany and France. In Italy, this development can be served only by the decrease of other packaging materials, and the establishment of modern lifestyles of single consumers and small households. A very interesting sector, in fact, according to a study conducted by Ceresana, a market research company, pointing out that the European market for flexible packaging is expected to reach a market volume of about 19.2 million tonnes in 2021. It results that stand-up pouches are an important growth segment on the market for flexible packaging, progressively replacing metal cans and rigid plastic containers.
注意环境
不同类型的包装(塑料包装膜、塑料运载袋和麻袋、塑料收缩和拉伸膜、纸标签等)对应于不同类型的材料:聚乙烯(PE)、聚丙烯(PP)、聚对苯二甲酸乙二醇酯(PET)、聚氯乙烯(PVC)、其他塑料材料、纸和铝。使用单层或多层材料的决定与其所含食品的特性及其所需的保质期密切相关。许多特性促使食品工业转向环保软包装材料,有助于节约原材料。所有的软包装材料(金属或卷筒复合膜)的特点是轻。多年来,软包装材料的重量有所下降,但性能水平保持不变。这种减少是由于更轻的材料和新的加工技术。事实上,铝箔可以被塑料薄膜的金属化所取代。纸张和硬纸板的使用也在减少,取而代之的是由耦合聚合物制成的塑料薄膜,它们的使用量稳步增长。即使使用阻隔膜也会导致膜层或厚度的减少。出于对环境的普遍关注,在可能的情况下,不可回收材料被替代材料取代,如生物可降解、可堆肥(PLA)和氧化可降解薄膜。 All these small actions provide an additional reduction of the film thickness, without affecting the pack resistance to external agents. Reduced footprint provides considerable energy savings, and simpler transportation. Resealable flexible packs contribute to reduce food wastes, consumers being more attentive and sensitive both for environmental and economic reasons. On the environmental front, the recycling issue must be improved compared to paper or glass packaging materials. Solutions have been proposed such as using flexible packaging materials in waste-to-energy plants for heat generation, water heating, or the generation of heat, or the production of electricity.
每种食物都有自己的电影
水果和蔬菜的广泛使用柔性包装材料:卷,单层或多层袋,用于苹果,胡萝卜,土豆的自动包装,以及检票袋,宏观和微穿孔或冲压。聚乙烯和聚丙烯盖塑料,木材和纸板板条箱,个性化,打孔,用于包装水果,蔬菜和柑橘产品。挤出和编织管状网,用于包装大蒜和洋葱。用于肉类,香肠和奶酪的柔性包装材料必须保证屏障性能,以确保长期维护和保护包装产品。为此目的共挤出和层压膜,使用具有特定的热成型性能,使用宽范围的密封性,气体屏障和穿刺抗性。该薄膜可以是巴氏纤维化和灭菌,可剥离的,耐粘性的,刚性或半刚性,适用于微波的包装机,适用于水平,垂直和热成型。对于零食和烘焙食品的包装,使用确保高光学特性和优异密封的薄膜。该薄膜可以是中性的或印刷,柔性或凹版印刷,金属化或非金属化,具有屏障,适用于改性的大气包装。单层和多层袋和具有光滑,密封性和高温高抗性的特定特性的薄膜主要用于包装 - 甚至冷冻鱼产品。对于咖啡豆的地面咖啡包装,使用极其柔性的包装材料,适用于生产真空包装,咖啡盒和预成型袋,脱气阀。 Latest trends impose the use of high-barrier metalized polypropylene with values close to those of aluminium.
高性能的胶水
各种胶水可用于层压塑料,铝和纸膜,所有这些典型的食品部门材料。有聚氨酯粘合剂,有或没有溶剂;当在聚乙烯薄膜中挤出时,热熔粘合剂允许生产可重复密封的包装,越来越多地用于包装各种食品。一些粘合剂可以在低温下施加,并确保高层速度,以及可预期性和更长的食品新鲜度。用于柔性包装材料的水性聚氨酯粘合剂,根据由米兰大学食品,环境和营养科学部的包装部门进行的研究,表现出增强的物理性质以及增加的可持续性价值,开启新的路径柔性包装行业。该项目“在柔性包装中实施纳米纤维素涂层的策略”旨在评估新型多层结构的可行性,用于高性能的柔性包装应用。为此目的,使用特殊的水性粘合剂将CMC(纤维素纳米晶体)涂覆的膜层压在聚酯上。通过组合PET涂覆(CNC)/ PE,获得了氧气阻隔和机械性能方面的最佳结果。最终的包装(PET / CNC / WATERBOE PUD粘合剂/ PE)提供了几种基本效率,因为使用一部电影较少,因此对环境影响低。 Furthermore, nano-cellulose is obtained from renewable nature; non-food agricultural based sources; it provides biodegradability and/or biocompatibility, low cost and low energy consumption. Special polyurethane adhesives for the flexible food packaging industries entered the market, either solvent-based or solvent-free. They offer good thermal and chemical resistance, and the possibility to treat the completed film (film, metalized and film, aluminium, paper) structures through sterilization and pasteurization processes, typical of the food industry. These adhesives can be used with different mixing rations, according to the expected performances. Furthermore, they offer good adhesion and wettability properties, allowing for excellent final optics.





