In this paper,combined with the actual situation encountered in the process of product transportation,the finite element analysis software ANSYS/LS-DYNA was used to simulate the dynamic drop process of the buffer pack...In this paper,combined with the actual situation encountered in the process of product transportation,the finite element analysis software ANSYS/LS-DYNA was used to simulate the dynamic drop process of the buffer packaging structure of T01067∗series fuel pump,and the simulation results were analyzed,and a conclusion was drawn.According to the fuel pump weight calculation buffer material thickness,according to the product size and structure design of the pulp molded cushion structure,simulation of static cushioning performance,and dynamic drop simulation,for the subsequent structural optimization cost reduction to provide early warning[1,2].Check the simulation production cost,reducemany times a large number of experiments and time,structure is ideal type prediction,find out the ideal optimization total,physical test,further optimization and improvement[3].展开更多
The molded pulp,a product of three-dimensional papermaking technology,is environmentally friendly and has a low environmental impact due to its ability to decompose quickly in the natural environment after disposal.Th...The molded pulp,a product of three-dimensional papermaking technology,is environmentally friendly and has a low environmental impact due to its ability to decompose quickly in the natural environment after disposal.The application of molded pulp for food packaging can replace or reduce the use of plastic food packaging.Researchers extract fibers from plants for the production of safe and hygienic molded pulp for food packaging,and they also study and enhance the qualities of molded pulp to broaden its use in the food industry.This paper reviews the sources and varieties of plant fiber used in molded pulp for food packaging,as well as research on the improvement and optimization of the performance of molded pulp products.Additionally,issues with molded pulp’s actual use for food packaging are reviewed,along with the potential for future research.This work can serve as a reference for molded pulp applications and research in the food industry in the future.展开更多
Derived from renewable resources,cellulose based materials are gaining new importance due to their recyclability and biodegradability.Still,one fundamental challenge is their high sensitivity to water.The addition of ...Derived from renewable resources,cellulose based materials are gaining new importance due to their recyclability and biodegradability.Still,one fundamental challenge is their high sensitivity to water.The addition of wet strength agents(WSA)is hence necessary to maintain strength and integrity in humid or wet conditions.In this article,technical lignin was used as WSA in bleached kraft pulp,which was thermopressed to materials with the potential to replace plastics.Cationic starch or a cationic flocculant(PCB 20)was used as a retention aid during the filtration process.The effect of moisture during thermopressing and lignin particle size were also studied.The results showed that elevated moisture during pressing had the biggest impact both on dry and wet strength.Wet strength(tensile test),up to 9 MPa,and wet strength retention,up to 12%,were obtained when moisture was present during pressing.However,the type of flocculant and the size of the lignin particles also had a limited effect on the strength.Wet strength improvement was most probably due to the plasticization of lignin at high temperatures,which was further aided by water.The cellulose-lignin network was strengthened by the melting of lignin,consolidating the network after cooling.The wet stiffness of the cellulose substrates was also increased from 200 to 938 MPa in the presence of lignin,while the elongation was maintained and no embrittlement was observed.The results in this article might hence pave the way for new developments in molded pulp and cellulose based plastics replacement.展开更多
文摘In this paper,combined with the actual situation encountered in the process of product transportation,the finite element analysis software ANSYS/LS-DYNA was used to simulate the dynamic drop process of the buffer packaging structure of T01067∗series fuel pump,and the simulation results were analyzed,and a conclusion was drawn.According to the fuel pump weight calculation buffer material thickness,according to the product size and structure design of the pulp molded cushion structure,simulation of static cushioning performance,and dynamic drop simulation,for the subsequent structural optimization cost reduction to provide early warning[1,2].Check the simulation production cost,reducemany times a large number of experiments and time,structure is ideal type prediction,find out the ideal optimization total,physical test,further optimization and improvement[3].
基金supported by the Special Funds for Fundamental Scientific Research Funds of Central Universities(JUSRP21115)Independent Research Project Funding Project of Jiangsu Key Laboratory of Advanced Food Manufacturing Equipment Technology(FMZ201902).
文摘The molded pulp,a product of three-dimensional papermaking technology,is environmentally friendly and has a low environmental impact due to its ability to decompose quickly in the natural environment after disposal.The application of molded pulp for food packaging can replace or reduce the use of plastic food packaging.Researchers extract fibers from plants for the production of safe and hygienic molded pulp for food packaging,and they also study and enhance the qualities of molded pulp to broaden its use in the food industry.This paper reviews the sources and varieties of plant fiber used in molded pulp for food packaging,as well as research on the improvement and optimization of the performance of molded pulp products.Additionally,issues with molded pulp’s actual use for food packaging are reviewed,along with the potential for future research.This work can serve as a reference for molded pulp applications and research in the food industry in the future.
基金supported by funding from the Research Council of Norway.
文摘Derived from renewable resources,cellulose based materials are gaining new importance due to their recyclability and biodegradability.Still,one fundamental challenge is their high sensitivity to water.The addition of wet strength agents(WSA)is hence necessary to maintain strength and integrity in humid or wet conditions.In this article,technical lignin was used as WSA in bleached kraft pulp,which was thermopressed to materials with the potential to replace plastics.Cationic starch or a cationic flocculant(PCB 20)was used as a retention aid during the filtration process.The effect of moisture during thermopressing and lignin particle size were also studied.The results showed that elevated moisture during pressing had the biggest impact both on dry and wet strength.Wet strength(tensile test),up to 9 MPa,and wet strength retention,up to 12%,were obtained when moisture was present during pressing.However,the type of flocculant and the size of the lignin particles also had a limited effect on the strength.Wet strength improvement was most probably due to the plasticization of lignin at high temperatures,which was further aided by water.The cellulose-lignin network was strengthened by the melting of lignin,consolidating the network after cooling.The wet stiffness of the cellulose substrates was also increased from 200 to 938 MPa in the presence of lignin,while the elongation was maintained and no embrittlement was observed.The results in this article might hence pave the way for new developments in molded pulp and cellulose based plastics replacement.
