| In order to reduce the environmental impact of packaging products, people have tried to do life cycle assessment for packaging materials and containers such as paper, plastic, metal and glass, but the singularity of its indicators affect the comparability of production systems between different packaging solutions and packaging product production system, so can’t provide direct and transparent scientific guidance for decision-making, producers and consumers.Eco-efficiency has become the hot issue on industrial and production development at home and abroad, it is one of the symbol indicators for developing new products and new technology, as a concept of multi-indicator evaluation taking into account the technical, economic and environmental benefits. In this paper, indicator system and evaluation model of eco-efficiency for corrugated board box were built based on eco-efficiency evaluation method, the meaning and quantitative method of corrugated board box value in the model were expounded from the perspective on the production and use of industrial product. Use energy efficiency, environmental efficiency and eco-efficiency as eco-efficiency quantization indicators of corrugated board box. The production data of the production process of corrugated Flexography production process and the gravure pre-printed were got based on the practical research from factory in Dalian. Typical corrugated board box production process (flexography technology and gravure printing pre-printed process) in Dalian region were evaluated use Eco-efficiency through Multiple levels analysis list, and join sensitivity analysis on the basic results explain. Finally, put forward improvement suggestions on production process and waste recycling emissions for the enterprise according to the evaluation and analysis results.Use corrugated board box plant’s monthly production of2.6million m2as the functional unit, and the boundaries of the system from obtain of raw paper to corrugated board box. Results of Eco-efficiency evaluation show that when printing area is50%in the functional unit boundaries of the system, in the eco-efficiency evaluation of the corrugated box flexography production process, energy efficiency is2.85, environmental efficiency is0.333, and resource efficiency is0.0874. In the eco-efficiency evaluation of the corrugated box gravure pre-print production process, energy efficiency is2.48, environmental efficiency is0.341, and resource efficiency is0.089. The resources efficiency and environment efficiency of flexography production technology is slightly lower than the gravure pre-printed production technology’s, the energy efficiency of flexography production technology is higher than the gravure pre-printed production technology’s. The result of the sensitivity analysis further shows that the print area has a direct impact on the eco-efficiency indicators of corrugated board boxes. The greater of the printing area, the higher of corrugated box resource efficiency, energy efficiency and environmental efficiency. Gravure pre-printed eco-efficiency indicators have a greatly increase, especially when printing area more than80%. Finally, suggestions of original paper management, plate choose, equipment modification and waste treatment improvement were proposed.The innovation of this paper is construct the index system and computational models suitable for the eco-efficiency evaluation of corrugated board boxes based on life cycle assessment methodology. Made life-cycle eco-efficiency evaluation take production of corrugated board boxes flexography production technology and gravure pre-printed process as a case study, which based on life cycle assessment methodology. Select the higher ecological efficiency of corrugated cardboard box production mode through quantitative comparison. Provides new data reference for optimize the actual production system. Help enterprises choose "green technology" which eco-efficiency is better in the technological transformation, help enterprises step-by-step plan to implement cleaner production and sustainable production. |
