Embodiment of the hottest green packaging in flexi

2022-08-10
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The embodiment of green packaging in flexible packaging design

human society has experienced a complete industrialization process for more than 100 years. It seems to have shown a prosperous and stable scene in the field of industrial design, and it is constantly updating and developing at the same time. But behind the increasing prosperity and development of the industrial field, mankind has to face the embarrassment of the deteriorating environment and the gradual depletion of energy. As a derivative industry required by all industrial products, it is obvious that the packaging industry can not avoid this environmental pressure, and the concepts and products about green packaging that can be seen everywhere at present are also the real response of the whole society to the green requirements of the packaging industry. So how to realize green design in the flexible packaging industry

how to embody the concept of green packaging in flexible packaging design. To be sure, in order to embody the concept of green packaging in the design of flexible packaging, we must follow several design principles of green packaging, namely 3r1d principle plus two expansion principles

reduce design principle

this principle can be understood literally as follows: packaging design should try to use the least packaging materials and packaging costs on the premise of meeting the conventional functions of protection, easy use, easy sales and so on. It is inconceivable that this seemingly very simple principle is currently encountering an unprecedented embarrassment in China's packaging industry -- after the vigorous publicity of the previous domestic "first-class products, second-class packaging", the current excessive packaging in the fields of tea, health supplements and high-end alcohol products is also inconceivable, So that the relevant international departments have to issue relevant laws and regulations to prohibit this kind of irrational packaging phenomenon that wastes resources and may breed corruption. The author analyzes and analyzes the reasons for this kind of excessive packaging design from the perspective of a professional packaging engineer, which may be that businesses have entered a misunderstanding that only sells commodity packaging, not the commodity itself, This is not to understand the sentence "packaging is an integral part of commodity attributes, and DuPont industrial bioscience company ultimately shows a more cost-effective part, but it is by no means the whole of commodity attributes"

the following example illustrates how to realize the reduction design in the field of flexible packaging. For example, the design of a composite film for the packaging of a traditional Chinese medicine granule requires avoiding light, water and gas, which is a very common packaging requirement at present. It is assumed that the selected packaging material structure is 20 μ PET/16 μ Aluminum foil/50 μ PE, in which pet provides mechanical strength protection and exists as a printing layer, aluminum foil provides barrier property, PE is used as a heat sealing layer, and the dry composite method is used for composite processing, using two-component polyurethane glue. Obviously, the design of this material structure will not be a problem, but also meet the basic purpose of product packaging - to protect goods and promote sales

however, if more detailed quantitative index requirements can be put forward for the packaging design according to some information of the interior products, such as product weight, storage, transportation and use environment, and the sensitivity to H2O and o2/co2, such as mechanical strength, heat sealing conditions and strength, water/gas resistance index of packaging materials, then whether the packaging materials can be reduced in design can be considered. If the mechanical strength and barrier of the product to the material are not as high as originally thought, the reduced 12 μ

PET/12 μ Aluminum foil/35 μ PE (only for example here, in fact, there can be many changes in material structure to choose from) whether the material structure is also OK, or other material structure schemes. Of course, whether we can make a correct judgment quickly or not is based on a good understanding of the characteristics of these conventional materials, and familiar with various empirical data and laboratory data

the principle of reduction is a win-win principle: for users, it saves the cost of product packaging; For the environment, it reduces the burden. But this puts forward strict requirements for packaging designers. Only professional packaging engineers with rich experience can make a decisive and correct choice. Of course, the final result still needs some necessary experiments to confirm

reuse design principle

as the name suggests, packaging should be easy to reuse. This is a relatively simple principle, which is also very common in the field of packaging. In consideration of cost, when possible, manufacturers will generally take the initiative to request the design of reusable packaging for goods. However, there is one thing worth considering here: the number of times of reuse and its judgment basis, especially the latter, should be considered, such as the mechanical strength, appearance and hygiene of the package to make the final evaluation

but the principle of reusability does not mean that what was originally loaded must be used to load the same thing after recycling. In the field of flexible packaging, few packages can be designed as strong and durable as turnover boxes or pallets and can be reused many times, but excellent packaging engineers should consider what other residual value the remaining product packaging can bring to consumers when the product is used, rather than being directly recycled or discarded after use. For example, the beverage bottle of Weiquan juice is designed to be very beautiful and durable. After completing its inherent packaging mission, it can also be used as a very good water cup. The author has such experience

recycle design principle

this is the most perfect and thorough green packaging design principle, and it is also an environmental protection design principle that most non professionals want. It requires that product packaging should be easy to recycle and reuse, which is different from reusable: reuse is realized on the basis of not changing the basic form of packaging, recycling is realized by recycling and reshaping packaging materials, and the most common cases are the recycling and re granulation of various plastic products and the re recycling and pulping of paper packaging materials

from the current hot waste plastic and paper/board recycling market, it is not difficult to see that the packaging industry is actively fulfilling this recycling obligation, but this is more for economic purposes than conscious environmental awareness. There are also relevant laws and regulations that clarify that packaging manufacturers have the obligation to perform this recycling, that is, "Whoever produces, who is responsible", and supplemented by economic means to ensure that these policies are effectively implemented

of course, the above are some means of back-end control, and the real core of this principle is the choice of packaging materials at the front end. The following points must be considered when designing and selecting materials: try to choose single or similar materials; The adhesive selected between different layers should be easy to be cleaned and stripped by a special substance; Do not print or choose ink printing that is easy to clean and separate. An example of the application of this design principle is to change the label on the PET bottle from the original PVC material to PET material; Corrugated boxes are not allowed to be connected by staples, but should be bonded with starch glue, etc

at present, there are many kinds of materials in the field of flexible packaging. In order to balance the performance and price, it is generally difficult to ensure that the same material is used for more than three-layer film structure, which is an unavoidable fact. Therefore, at this stage, the focus of technical research in this principle is how to find effective substances/methods to reasonably separate more than five main materials in a film, which may be PE, PP, pet, PA, PS PVC, PVDC, aluminum foil, etc

however, after the recycled materials are processed and made into packaging materials again, their various properties will decline to a certain extent, and the decline range is related to the purity and internal destruction of the recycled materials. However, this is enough, because not all use purposes will put forward very high requirements for material properties, so there is always a time when they are applicable. Unfortunately, for plastic packaging materials, after many times of recycling, there are always times when they can't be recycled. At this time, heat energy can also be recovered by combustion (considering that plastic materials sometimes release all kinds of highly toxic and harmful gases) or buried directly in deep pits. Of course, if the material itself can degrade completely and harmlessly on its own initiative, it is a perfect green packaging cycle mode

degradable design principle

theoretically, This design principle is a helpless document. A core problem is that "the final choice of the external thermal insulation materials for civil buildings should be the materials with the combustion performance of class A. the specific meaning is that the packaging waste should be decomposable without causing environmental pollution, so as to achieve the purpose of improving the soil. It can be seen from this that to achieve this design principle, the key is to select appropriate degradable materials. And this degradable material (basically refers to plastic materials) , which is exactly a scientific term that is currently being heated up, has simply become the embodiment of green packaging. Packaging companies, large and small, use their own plastic mixed with starch substances as degradable plastic and play a big technical card. Even if the power supply is suddenly interrupted, they think that they are high-tech enterprises and a full green packaging enterprise. This is not desirable

degradable material refers to a kind of plastic whose chemical structure changes at a specific time and in a specific environment. Degradable plastic packaging materials not only have the functions and characteristics of traditional plastics, but also can be decomposed and reduced in the natural environment through the action of ultraviolet light in the sun or microorganisms in soil and water after the service life is completed, and finally re-enter the ecological environment in a non-toxic form. Degradable plastics are mainly divided into synthetic photodegradable plastics, photodegradable plastics with photosensitizers and biodegradable plastics, as well as multifunctional degradable plastics combined with a variety of degradable plastics. According to the environmental conditions of degradable plastics, they are also divided into photodegradable plastics, biodegradable plastics (fully biodegradable plastics, partially biodegradable plastics), chemically degradable plastics (oxygen degradable plastics, water degradable plastics), and composite degradable materials composed of the above three kinds of degradable plastics

it can be seen that degradable materials are not as mature as we thought, and there are still the following technical difficulties: the degradation conditions are difficult to achieve under normal conditions; The properties of the material are less than those of non degradable materials; The integrity of degradation needs to be improved. However, no matter how excellent the packaging engineer is, he is powerless in this regard. He can only provide biodegradable materials that can really meet the needs of use, and try to choose such materials. But in fact, there is not much room for such a choice. The author has consulted several packaging manufacturers who claim to provide degradable materials, but the materials obtained are quite disappointing

the remaining two expansionary requirements are actually very straightforward: the first point is that the packaging material itself is required to be harmless to human body and the environment; The second point is that packaging materials are required to be harmless to human body and the environment within their life cycle. These two requirements are more constrained by the relevant laws and regulations of various countries. If the relevant laws are missing, packaging engineers have insisted on choosing those environmentally friendly packaging materials, but from the author's own experience, the reality is that materials with greater cost competitiveness are selected

in the field of flexible packaging, which focuses on the packaging of food, drugs, daily chemical products and some industrial products, we hope to provide customers with safe, effective and environmentally friendly packaging design solutions. Safe and effective

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