Discussion on the hottest green packaging and its

2022-09-19
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Discussion on green packaging and its system design

release date: Source: China's paper industry

Green has become the goal that people pursue and strive for in today's society. This is a rational consciousness and behavior, which is the unity of human self-knowledge and seeking to be with nature. Today, China paper industry takes you into the relevant design of green packaging and introduces the relevant contents in detail

first, green packaging and green materials

with the strengthening of people's awareness of the environment and ecology, a green trend will emerge. Green economy, green consumption, green food, green refrigerator, green clothing and other green titles and objects have emerged one after another, and green has become the goal of people. As an important part of green consumption, green packaging naturally attracts people's great attention. Developing green packaging, developing green materials and solving the pollution of packaging waste have become one of the major measures for countries to implement environmental protection

1. Green packaging and its connotation

green packaging, also known as ecological packaging, pollution-free packaging or friends of the environment packaging. It refers to the packaging that is harmless to human health and ecological environment, can be reused or recycled, and meets the requirements of sustainable development. Green packaging should fully reflect the requirements of green in terms of design, material selection, process methods, use and recycling of packaging materials, and can form a balance in the natural ecosystem, specifically:

① in the design, the packaging products must have the performance of not causing damage to the environment, and the environmental protection function must be included in the packaging function design, so that the packaging products are easy to be treated, recycled, eroded, or regenerated after being discarded Reuse reflects the principles of environmental protection and resource regeneration

② the selection of materials should be based on natural recycled materials, strive to achieve low quantity and high function, and mostly use reusable, recycled and degradable materials

③ adopt green technology support and implement pollution-free "clean process" production process. The substances produced, such as additives, additives and adhesives, meet the green requirements

④ like other green products, green packaging forms an ecological natural cycle according to a certain life cycle, forming a green cycle chain (see the figure below). The result of green packaging is to take nature and return to nature, so that human beings can obtain a good natural environment, natural resources and long-term support. Any link of the green packaging cycle chain forms its own basic form with green content, forming a green system. Especially at the end of the system, its green needs the support and guarantee of people's and society's green consciousness, green management, green regulations and green behaviors affected by it. Otherwise, the green system will be difficult to form and eventually destroyed

2. Green packaging materials

whether the packaging materials meet the green requirements depends on whether the green packaging materials are used. Green packaging materials should meet the requirements of green

(1) characteristics of green packaging materials

green packaging materials have the following characteristics:

① discarded packaging products or materials can be recycled, recycled, or reused, without pollution and damage to the ecological environment

② plastic should be used as a branch of packaging products or materials that are not easy to recycle to corrode and degrade in a short time, and return to nature under natural conditions

③ under the condition of meeting the requirements of packaging function, it can realize high-quality and light-weight design, reduce the consumption of natural resources and energy, and reduce the waste of packaging materials

④ packaging materials have low production cost and reasonable performance price ratio, which can be produced and popularized

(2) classification of green packaging materials

(1) recyclable packaging materials, packaging products and their materials can be recycled, reused or recycled, which is the most economical and effective way to protect the environment, and countries around the world are vigorously promoting it. The packaging materials that can be reused and recycled include the following categories

① after chemical treatment, paper materials can be reused for many times until the fiber disappears

② glass ceramic materials can be recycled and reused, or recycled in the form of scrap. Glass can be designed with thin wall, high strength and low brittleness

③ metal materials metal packaging products and their materials can be recycled, recycled, or recycled to improve the utilization rate

④ plastic material thermoplastic, recycled and re granulated to produce plastic products, such as PS, PVC, pet, etc; It can also be recycled and mixed with other sundries for incineration; Some plastic containers can be reused many times after recycling and cleaning, such as PET bottles, FC bottles, etc

(2) degradable packaging materials degradable materials refer to materials whose chemical structure changes at a specific time and in a specific environment causing performance loss. According to different degradation mechanisms, degradable plastics can be divided into photodegradation, biodegradation and composite degradation plastics

① photodegradable plastics degrade under the action of light. It can be divided into additive type and synthetic type. Synthetic photodegradation refers to the introduction of some weak chains with low energy that are easy to be broken, or the connection of some photosensitive groups and transferred atoms that see light decomposition in the process of polymer synthesis. In this way, chemical reactions will occur when encountering the action of light, resulting in the degradation of polymer macromolecules, and the long chains will be broken into small molecular fragments that are easy to be swallowed by microorganisms. The additive photodegradation is to add a certain amount of photosensitizer to the plastic ingredients, which will also degrade when encountering the action of light. The method is relatively simple and the cost is low

② biodegradable plastics are degraded under the action of bacteria, molds and various microorganisms. Due to the factors that can be decomposed by ordinary microorganisms in the internal structure or components of the material, when the packaging is discarded, it will be swallowed and absorbed by microorganisms in the natural environment and decomposed into small molecular compounds until it is finally decomposed into inorganic substances such as salt water and carbon dioxide. Biodegradation can be divided into microbial synthetic type, synthetic polymer type and blending type. Blended biodegradable plastic is a kind of packaging product with certain biodegradability after mixing a certain amount of starch, natural straw, straw, fruit shell and other biodegradable substances into the plastic

③ composite degradable plastics degrade under the joint action of light and biology. Add biodegradable starch, controllable degradation photosensitizer, automatic oxidant and other substances to the plastic, so that the performance of the plastic will decline after use, and it will be divided into fragments at regular intervals. After that, the plastic will decompose rapidly through the action of microorganisms and the reaction of automatic oxidant

(3) edible packaging materials are harmless to human body. Materials that can be naturally absorbed by the human body and can also be weathered and eroded in the natural environment. The raw materials used are natural organic small molecules and polymers, such as amino acids, gel, proteins, plant fibers, etc., which are non-toxic, tasteless, transparent, light and hygienic. Edible packaging materials can effectively solve the pollution problem, and have excellent application and development prospects

(4) natural packaging materials natural plant fiber materials, including straw, wheat straw, cotton straw, potato seedlings, reed straw and moso bamboo, can be directly prepared or made into packaging containers through the process of crushing, pulping and molding, and sometimes used as additive materials. Natural materials decompose in the natural environment, and their packaging waste can also be incinerated to return to nature

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Second, green packaging system design

green packaging products are packaging products obtained by implementing green clean processing and molding of green packaging materials through packaging design according to the requirements of packaged products and environmental protection. The essence of green packaging design is the design of green packaging system

1. Green packaging design principles

(1) 3r1d principle

3r1d is an internationally recognized green packaging design principle and method, and it is also an important connotation of green packaging

① the principle of reduce is the principle of quantitative reduction (or light industry). It is required that the thickness of cast strip blank is 20mm; According to the senior technical personnel of Hazlet company, on the premise of ensuring the packaging, protection and use functions, the packaged products strive to consume the least amount of materials, so as to save resources, reduce energy consumption, reduce costs, and reduce emissions and waste. Fulfilling this principle includes optimizing the structure, proper packaging, replacing heavy packaging with light packaging, replacing non renewable resource materials with renewable resource materials, and replacing resource deficient materials with resource rich materials

② Reuse Principle is the principle of reuse. The repeatedly used packaging products can not only save materials, reduce energy consumption, but also be conducive to environmental protection. Packaging design should give priority to the possibility of reuse, and implement the design scheme of reuse when technology, materials and recycling management are feasible

③ the principle of recycle is the principle of recycling. For packaging products that cannot be reused, it is necessary to consider the possibility of recycling treatment and use recycling technology to form recycled materials or recycled packaging. For example, recycled paper, recycled cardboard, recycled plastics, glass, ceramics, domestic lithium battery related enterprises are expected to usher in global competition opportunities. After metal packaging products are discarded, they can be remelted and recycled to make new and the same materials or packaging products. Some materials and packaging products can be processed to obtain new usable substances and generate new value. Such as the oiling and vaporization of waste plastics, oil or gas with high use value can be obtained

④ the degradation principle is the degradation principle. The packaging products and materials used, which cannot be recycled and reused after being discarded, cannot be recycled and recycled, or have little recycling value, should be degraded and eroded in the natural environment, and will not pollute the natural ecological environment

(2) green system principle

green packaging design is aimed at the whole process of packaging products. From the processing and selection of materials, the production and molding of packaging products, the circulation and use of packaging products, to the recycling and treatment of packaging waste, every link meets the green requirements and has no pollution consequences

(3) economic principle

green packaging design should save materials, reduce consumption, reduce costs, improve efficiency and increase competitiveness

2. Contents of green packaging design

the main contents and requirements of green packaging design are as follows

(1) selection of materials

the main materials and auxiliary materials used for packaging should be green packaging materials that meet the requirements or obtain the national environmental certification mark, which can not cause physical and chemical damage to the contents and have the protective function required by the contents; The selected green packaging materials should have good processing and molding performance. Printing coloring performance, suitable for the implementation of "cleaner production" standards; The application of all packaging accessories does not pose a hazard to human body, contents and natural environment; The selected materials should also have reliable supply channels, sufficient supply, or qualified substitutes

for packaging products that are determined to be recycled and reused, attention should be paid to the selection of material strength, stiffness, wear resistance and environmental adaptability

(2) positioning of green packaging design

before design, the ordering unit of green packaging should carry out design positioning, and verify the design conditions and design requirements. Including the positioning of corporate image, interior products, consumption objects, sales market, competitive environment, etc

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