High-tech plastic packaging becomes the future development direction

The 21st century is the century of environmental protection. Environmental issues are becoming more and more important, and resources and energy are becoming more and more tense. Building a circular economy society and taking the road of sustainable development have become the focus and urgent task of the world, and become the development of all walks of life and human activities. In order to meet the requirements of the new era, in addition to meeting the market's increasing requirements for packaging quality and quantity, plastic packaging materials must be developed to save resources, save energy, be easy to recycle after use, and be easy to dispose of or be easily consumed by the environment. Nano or degradation is the starting point of technology development. New materials, new processes, new technologies, and new products for plastic packaging are constantly emerging, and are developing in the direction of high performance and multi-function, actively adopting new raw materials, new technologies, expanding application fields, and harmonious development of plastic packaging and environmental protection.

High-impermeability plastic packaging materials have been rapidly developed and widely used because of their ability to preserve quality, freshness, flavor and prolong shelf life. In addition to the currently widely used polyvinylidene chloride (PVDC), ethylene, vinyl alcohol copolymer ( In addition to EVOH), in recent years, environmentally compatible materials have been developed, promoting polyvinyl alcohol (PVA), polyethylene terephthalate (PEN), copolyamide (MXD6), silicon or aluminum oxide evaporation films (soft glass) ), the development of nano-inorganic materials will be more eye-catching.

The use of metallocene polyenes (MHDPE, MLLDPE, MPP) can further improve many properties of flexible packaging such as strength, toughness, transparency, permeability, heat resistance and processability. It will receive great attention and be welcomed by enterprises.

Functional packaging materials, such as functional fresh-keeping films, sheets, microporous breathable fresh-keeping films, selectively permeable packaging films, multi-functional heat-shrinkable packaging films and packaging with special functions and convenience (easy to open, easy to reseal) Materials and products will be further developed. The biggest advantage of aseptic packaging materials and technology is that under aseptic conditions, no preservatives are added, no refrigeration is required, and the original nutrients and flavors of the food can be retained to a greater extent, which can greatly extend the shelf life and facilitate storage and transportation. The market is developing very fast, and its uses are constantly expanding. In addition to taking a large share in dairy products and fruit sweat drinks, it will further expand to the fields of pharmaceuticals, cosmetics and condiments.

Nano-composite packaging materials will be rapidly industrialized with the rapid development of nanotechnology. Because of its wear resistance, hardness, strength, barrier properties, and plasticity have been significantly enhanced and improved, in addition to food packaging, it can also be used for special packaging. Such as anti-static, anti-electromagnetic, anti-explosion and invisible, dangerous goods packaging, etc., it is expected that it will lead to a huge change in traditional plastic packaging materials.

Environmentally friendly (environmentally friendly) plastic packaging materials (or green plastic packaging materials) have become a global focus with the implementation of the IS14000 series of environmental management standards. Among them, plastic packaging materials that are easy to recycle and reuse, such as PET and PEN, are prone to environmental degradation. Biodegradable plastics in plastics (EDP) have become a hot spot, and others such as zero-polluting foam, thin-walled bottles and bag-like packaging containers have also attracted much attention.

Compared with traditional aseptic paper packaging, three-piece metal cans and glass bottle packaging, hot canned plastic bottles have lower cost, transparent material, light weight, not easy to break, and good environmental protection in the packaging of juice and tea beverages. Therefore, it has been widely used, and its consumption accounts for more than half of the entire hot canning market. In addition to PET, hot canned plastic bottles have received more attention in recent years. BOPP bottles have the following advantages: the improvement of heat resistance is through the PP stretching process, the canning temperature can be increased to 100 degrees Celsius, the bottle mouth does not require special equipment treatment, and the oxygen barrier performance is greatly improved; BOPP bottles do not absorb moisture, Long storage period and easy recycling; product cost is more than 20% cheaper than PET bottles.