Plastic packaging materials

1、它具有重量轻、使用方便、阻隔性、渗透性、耐热性、耐寒性、耐腐蚀性好、外观色彩鲜艳、美观等特点。因其原料来源丰富、成本低、性能优异，被广泛应用于食品包装中，逐渐取代了玻璃、金属、纸张等传统包装材料，极大地改变了食品包装的外观。值得注意的是，塑料包装材料存在一个突出的缺点，不易降解，焚烧时会产生有毒气体。而且塑料包装材料是塑料制品中使用寿命短的品种，一般一个月。～三个月，不超过一年，此后大部分城市固体废物进入垃圾处理系统，有的则随意丢弃，造成“白色污染”。

1. It has the characteristics of light weight, convenient use, barrier, permeability, heat resistance, cold resistance, good corrosion resistance, bright color appearance, and aesthetics. Due to its rich source of raw materials, low cost, and excellent performance, it is widely used in food packaging, gradually replacing traditional packaging materials such as glass, metal, and paper, greatly changing the appearance of food packaging. It is worth noting that plastic packaging materials have a prominent drawback: they are not easily degradable and can produce toxic gases during incineration. And plastic packaging materials are the varieties with a short service life among plastic products, usually one month Three months, no more than a year, after which most of the urban solid waste enters the garbage treatment system, and some are randomly discarded, causing "white pollution".

2、塑料包装材料在废弃物中所占的比例很大，对环境的污染在各种包装材料中也很严重。目前的处理方案是回收利用和降解塑料的开发应用相结合。此外，由于塑料制品本身存在缺陷，其耐湿性和阻隔性普遍不如金属和玻璃容器，因此改善现有的塑料性能、开发新品种、提高强度和阻隔性、减少用量、重复使用、分类回收等非常重要。

2. Plastic packaging materials account for a large proportion of waste and cause serious environmental pollution among various packaging materials. The current treatment plan is a combination of recycling and the development and application of degradable plastics. In addition, due to the inherent defects of plastic products, their moisture resistance and barrier properties are generally not as good as those of metal and glass containers. Therefore, improving the performance of existing plastics, developing new varieties, increasing strength and barrier properties, reducing dosage, reusing, sorting and recycling are very important.

二是纸质包装材料

Secondly, paper packaging materials

1、纸质和纸质包装容器在现代包装工业体系中占有重要地位，占所有包装材料总量的40%～50%。与其他材料相比，它具有一系列独特的优点:加工性能好、印刷性能好、机械性能好、复合加工方便、成行性好、卫生性好、原材料来源广泛、品种多样、成本低廉、易于大规模生产。纸质包装容器重量轻、缓冲性好、应用广泛、废物可回收、无白色污染。随着人们意识的增强和生活实际需要，植物纤维快餐盒的开发和天然绿色包装材料的开发将成为未来纸制品食品包装材料的趋势。

1. Paper and paper packaging containers play an important role in the modern packaging industry system, accounting for 40% to 50% of the total amount of all packaging materials. Compared with other materials, it has a series of unique advantages: good processing performance, good printing performance, good mechanical performance, convenient composite processing, good processability, good hygiene and safety, wide source of raw materials, diverse varieties, low cost, and easy large-scale production. Paper packaging containers are lightweight, have good cushioning properties, are widely used, waste can be recycled, and have no white pollution. With the increasing awareness of environmental protection and the practical needs of daily life, the development of plant fiber fast food boxes and natural green packaging materials will become the trend of paper food packaging materials in the future.

2、此外，随着包装技术的快速发展，可食用包装纸是现代食品包装的重要发展方向。这种包装具有重要的和经济价值。目前国外有两种可食用的纸张，一种是以蔬菜为主要原料，成型后干燥蔬菜;另一种是将淀粉、糖糊化，加入其他食品添加剂，以类似造纸的方式成型。从应用和发展前景来看，以蔬菜为原料的绿色产品具有更大的发展潜力。

2. In addition, with the rapid development of packaging technology, edible packaging paper is an important development direction for modern food packaging. This type of packaging has important environmental and economic value. At present, there are two types of edible paper abroad. One is mainly made from vegetables, which are dried after forming; Another method is to gelatinize starch and sugar, add other food additives, and shape them in a similar way to paper making. From the perspective of application and development prospects, green products made from vegetables have greater development potential.

金属包装材料三

Metal Packaging Material III

金属包装材料的优异性能包括:高阻隔性、优异的机械性能、良好的容器成型加工工艺、良好的耐高低温性、导热性和耐热冲击性、良好的表面装饰性和易于回收的包装废弃物。这种包装材料多用于罐头和一些液体、糊状、粉状或高档食品。常用的金属包装材料有马口铁和铝，广泛用于制造食品和饮料的包装罐。

The excellent performance of metal packaging materials includes: high barrier resistance, excellent mechanical properties, good container forming and processing technology, good resistance to high and low temperatures, thermal conductivity and heat shock resistance, good surface decoration, and easily recyclable packaging waste. This packaging material is often used for canned goods and some liquid, paste, powder or high-end foods. Commonly used metal packaging materials include tinplate and aluminum, which are widely used in the manufacturing of food and beverage packaging cans.