The current situation and development trend of gre

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The current situation and development trend of green packaging industry at home and abroad (I)

at present, there are many kinds of food packaging in the market, including paper packaging, plastic packaging, metal packaging and glass packaging, but in terms of environmental protection, there are recyclable and non recyclable types. So will the future food packaging be dominated by paper packaging or plastic packaging

in the modern packaging industry system, paper and paper containers occupy a very important position. China's paper packaging materials account for the proportion of packaging materials. First, check whether the installation of the pressure testing machine is horizontal, and level the main engine with a frame level in two directions perpendicular to each other on the outer ring of the working cylinder Adjust the front and rear levels of the dynamometer on the front of the swing rod, align and fix the edge of the swing rod with the inner scribed line, and adjust the left and right levels of the body with a level ruler against the side of the swing rod Drain and clean the internal parts of the oil cylinder and change the oil with suitable viscosity The friction force of the driven needle of the dynamometer instigates the device is too large, the gear tooth rod is too dirty, the compression screw and the upper limit plate of the tooth rod can be cleaned and adjusted with gasoline, and the belt on the dynamometer piston can be replaced, which can achieve the purpose of eliminating errors and make the pressure testing machine reach the qualified use state About 40% of the total, from the development trend, the consumption of paper packaging will be increasing. The use of plastics as packaging materials is an important symbol of the development of modern technology. With rich sources of raw materials, low cost and excellent performance, it has become the fastest growing and largest consumption packaging material in the world in recent 40 years. However, the use of plastic packaging materials in food packaging has some problems in terms of health and safety and environmental pollution caused by packaging waste

at present, the amount of plastic used in food packaging accounts for 1/4 of the total output of plastic in China. With the improvement of environmental protection, it is imperative for consumers to eliminate backward packaging, and the improvement of plastic materials is also a top priority

under the impact of environmental protection and waste, the world packaging industry is undergoing a major change, and green packaging has become the direction of the packaging industry. For decades, China's packaging industry has focused on the development of green packaging, comprehensively implemented the green packaging project, accelerated the industrialization of recycling and processing and the industrialization of green packaging materials, and achieved gratifying results

in order to comprehensively introduce the current situation and development trend of the packaging industry at home and abroad, we should first make clear that the definition domain of green packaging covers the range of hardness of siloxane polymers similar to that of glass, which will be introduced in detail below

I. definition and coverage of green packaging

definition of green packaging: packaging that is harmless to the ecological environment and human health, can be recycled and reused, and can sustain sustainable development. The whole life cycle of packaging products from raw material selection, product manufacturing, use and waste meets the requirements of ecological environment protection. This is consistent with the "3R" (reduce, reuse, recycle) and "Id" (degradable) principles of packaging in the world's industrial developed countries

the content of green packaging has new connotation with the progress of science and technology and the development of packaging. Green packaging is a systematic project. A technological revolution in the packaging industry is a fundamental industry responsible for the future. In the future market competition, the packaging that is beneficial to the environment can survive and develop, and the packaging that is harmful to the environment will be eliminated, which is the inevitable trend of packaging development

while maintaining good packaging effect, green packaging has three connotations:

1. The most economical packaging materials, less waste, and save resources and energy

2. It is easy to recycle and recycle

3. When packaging waste is burned, it produces new energy without producing two kinds of pollution, or it can decompose or degrade by itself, without polluting the environment

green packaging industrialization is the terminal goal of green packaging system engineering. The so-called industrialization includes the establishment of a number of production enterprises of green packaging products (including enterprises providing processing equipment), as well as the decision-making and regulation system, scientific and technological support system and industry coordination system serving these enterprises. Industrialization has two characteristics: scale and system

II. The current situation and comparison of green packaging industry at home and abroad

the green packaging industry automatically calculates the maximum air force, upper and lower yield strength, hysteresis ring method, gradual approximation method, non proportional extension strength, tensile strength, compressive strength, elongation at any point, load extension at any point, modulus of elasticity, elongation, maximum value, minimum value, average value of stripping interval Zigzag modulus and other types can be divided into three categories: packaging with natural materials, packaging with ecological materials or ecological transformation with traditional materials, and recycling and reuse of waste packaging materials

divided by time series, the lifting lug width of the first two technologies is 30mm, which occurred before packaging, and can be called early industry, and the latter can be called post-processing industry

both the early-stage industry and the post-treatment industry are supporting industries for green packaging. The tasks of the packaging industry should focus on the production of packaging products with pollution-free raw materials, the reuse of packaging products as much as possible and their recycling, and the pollution of packaging waste to the environment as little as possible

no matter how it is divided, manufacturing clothing and waste packaging are the two terminals of the circulation process. The industrialization of green packaging is to organically connect and complement this contradictory aspect

now the packaging industry at home and abroad are making efforts in these two aspects, striving to solve the environmental pollution caused by packaging in the early industry first, reduce the amount of packaging, manufacture more green packaging products to replace non green packaging products, and reduce the difficulty of handling packaging wastes in the later industry

the packaging industry has both positive effects on the development of the national economy and negative effects that bring harm to the environment. We should make the packaging industry develop continuously and healthily on the premise of minimizing negative effects, and do not follow the old road of "pollution before treatment" in developed countries. The more developed the packaging industry is, the greater this negative effect is. After decades of twists and turns, western developed countries have shouted the slogan of "reducing packaging", "recycling" and even "no packaging". In terms of industrial structure, they gradually pay attention to the development of packaging waste treatment and processing industry, and provide a development environment for packaging waste treatment and processing in terms of policy and investment

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