Today, packaging plays a crucial role in maintaining the quality of products during uses by providing safeguarding against physical, chemical and environmental challenges. While polymer-based packaging material has be...Today, packaging plays a crucial role in maintaining the quality of products during uses by providing safeguarding against physical, chemical and environmental challenges. While polymer-based packaging material has been very extensively used, there has been a recent move to paper-based packaging products because of their economic and environmentally-friendly nature. Currently, Paper and paper-based board materials have been used as packaging material for food products, and e-commerce business. Adhesives in packaging industries are critical to the structure of most paper and paper board packaging, whether applied during the process of conversion and on the packaging line. From a production point of view, adhesive choice can significantly affect process line efficiency and production performance. Adhesive types used in paper industries are water-based adhesives both synthetic and bio-polymer based (starch, cellulose, protein and itaconic acid), Solvent-based adhesives (polyurethane and acrylic-based) and 100% solids adhesives like heat sealing adhesive and hot melts. More recently, water-based heat-expandable adhesive having thermally insulative and cushion-like properties has been provided for use in protective packages and wrap. Here, we aim to present an overview of the research trend of adhesives in the paper packaging industry. The overview summarizes the different adhesives for paper packaging industries.展开更多
The lap-shear strength and durability of adhesive bonded AI alloy joints with different pretreatments were studied by the lap-shear test and wedge test. The results indicate that the maximum lap-shear strength and dur...The lap-shear strength and durability of adhesive bonded AI alloy joints with different pretreatments were studied by the lap-shear test and wedge test. The results indicate that the maximum lap-shear strength and durability of the bonding joints pretreated by different processes are influenced by the grade of abrasive papers and can be obviously improved by phosphoric acid anodizing. Alkali etching can obviously improve the durability of bonding joints although it slightly influences the maximum lap-shear strength. The process which is composed of grit-finishing, acetone degreasing, alkali etching and phosphoric acid anodizing, provides a better adhesive bonding property of Al alloy.展开更多
The adhesion of single asperity contacting with a rigid flat is investigated. The microcontact model of the deformable asperity is established utilizing fractal geometry, which makes the resuRed adhesion model to rela...The adhesion of single asperity contacting with a rigid flat is investigated. The microcontact model of the deformable asperity is established utilizing fractal geometry, which makes the resuRed adhesion model to relate with the surface characteristics that the asperity belongs to. The Dugdale approximation is utilized to consider the adhesive interaction within and outside the contact area. Then the model for solving the elastic-plastic adhesion of single asperity is presented by combing the Maugis-Dugdale（MD） model. To illustrate the necessity of considering the plastic deformation in microcontact, simulations of the relationship between the adhesive contact load and the interference of the asperity are performed. The result shows that the presented model is more suitable for the solution of the elastic-plastic microcontact of spherical asperity due to intermolecular adhesive interactions.展开更多
Company Introduction: Xiongxian Huajiang Paper Plastic Package Co., Ltd. engaged in variety of flexible package. Our head office is located in Xiongan New Area of Hebei Province where is the most hopeful place in Chin...Company Introduction: Xiongxian Huajiang Paper Plastic Package Co., Ltd. engaged in variety of flexible package. Our head office is located in Xiongan New Area of Hebei Province where is the most hopeful place in China for the next thousand years, it is the new developing focus in China. We have got the most convenient transportation, our factory is only 47 miles from Beijing, and 110 mils from the port of Xingang.展开更多
Modern high performance adhesives are designed to offer an optimized balance of elasticity,toughness and plastic deformation capacity for the individual fields of application in e.g. the building and construction or t...Modern high performance adhesives are designed to offer an optimized balance of elasticity,toughness and plastic deformation capacity for the individual fields of application in e.g. the building and construction or transportation and vehicle industry. The long-term life prediction for adhesive joints based on laboratory tests requiring only days,weeks,or months is still a demanding challenge. Testing in practice is carried out with the intention of accelerating time dependent aging effects that may occur in a bonded joint during its service time. Initial strength values of bonded joints,such as shear or peel properties can often be obtained from the adhesive manufacturers or retrieved from literature. They are useful to compare different adhesives and to demonstrate the effect of parameters such as bond line thickness,overlap length or curing conditions,and,in some cases,the surface state. On the other hand only few data are available describing the mechanical long-term properties of adhesives related to creep and relaxation under static load conditions. Due to the nature of the polymer network of organic adhesives their viscoelastic-plastic deformation behavior is strongly time-and temperature dependent. The objective of this paper is to illustrate effective methods for investigating and predicting the creep and relaxation properties of adhesively bonded joints in the long-term region and for creating basic data for the design and engineering with adhesives.展开更多
Municipal solid wastes from industrial plants were pyrolyzed in a fixed bed reactor to evaluate the influence of paper/plastic ratio and reaction time both on product quantity and quality. Raw materials have been pyro...Municipal solid wastes from industrial plants were pyrolyzed in a fixed bed reactor to evaluate the influence of paper/plastic ratio and reaction time both on product quantity and quality. Raw materials have been pyrolyzed under nitrogen in a 3.0 dm^3 autoclave. Results show considerable differences in yields and quality of products obtained by pyrolysis of wastes with different paper content. Light and heavy oils were mixtures of organic compounds containing valuable hydrocarbons and oxygenated chemicals, while chars were rather composed of inorganic compounds from the raw materials. Longer reaction time of pyrolysis had produced higher non-condensable gas, water and light oil. Gases contained CO, CO2 and hydrocarbons, but the concentrations were very function of reaction time and paper/plastic ratio. Light and heavy oils showed similarities with middle distillates and heavy oils in refinery, the high paper content of the raw materials was unfavourable for longer storage of waste derived oils.展开更多
随着柔性电子行业的发展,传统的PET、PEN等塑料衬底由于成本更高,光取出效率低下等问题已经无法满足人们的需求.纸张由于其获取途径广泛,成本低廉,更加轻薄是一种前景广阔的柔性衬底.通过浸渍涂布工艺,将环氧树脂与硫酸纸进行结合,制备...随着柔性电子行业的发展,传统的PET、PEN等塑料衬底由于成本更高,光取出效率低下等问题已经无法满足人们的需求.纸张由于其获取途径广泛,成本低廉,更加轻薄是一种前景广阔的柔性衬底.通过浸渍涂布工艺,将环氧树脂与硫酸纸进行结合,制备了一种新的基材,即塑料纸.通过测试发现,塑料纸具有优异的光学性能、机械性能以及水和化学稳定.研究结果表明,通过环氧树脂涂布处理后,不仅提高了纸张表面的平整性,而且改善了纸张的润湿性.制备出的塑料纸光透过率高达88.25%,达到与PET基材同一水平,并且塑料纸的雾度达到62.9%,远远高于PET基材.塑料纸的拉伸强度为108.4 MPa,还兼具良好的水和化学稳定性.在大气环境下,基于发光电化池(LEC)的原理,成功地在塑料纸表面制备出有机发光器件,并实现均匀地发光.该器件的最大亮度为396.2 cd m^(-2),最大电流效率为0.64 cd A-1,是PET衬底的2.9倍,具有更加优异的光电性能.所研制的高透光率、高光雾度的塑料纸在柔性光电器件中具有很大的应用潜力.展开更多
文摘Today, packaging plays a crucial role in maintaining the quality of products during uses by providing safeguarding against physical, chemical and environmental challenges. While polymer-based packaging material has been very extensively used, there has been a recent move to paper-based packaging products because of their economic and environmentally-friendly nature. Currently, Paper and paper-based board materials have been used as packaging material for food products, and e-commerce business. Adhesives in packaging industries are critical to the structure of most paper and paper board packaging, whether applied during the process of conversion and on the packaging line. From a production point of view, adhesive choice can significantly affect process line efficiency and production performance. Adhesive types used in paper industries are water-based adhesives both synthetic and bio-polymer based (starch, cellulose, protein and itaconic acid), Solvent-based adhesives (polyurethane and acrylic-based) and 100% solids adhesives like heat sealing adhesive and hot melts. More recently, water-based heat-expandable adhesive having thermally insulative and cushion-like properties has been provided for use in protective packages and wrap. Here, we aim to present an overview of the research trend of adhesives in the paper packaging industry. The overview summarizes the different adhesives for paper packaging industries.
文摘The lap-shear strength and durability of adhesive bonded AI alloy joints with different pretreatments were studied by the lap-shear test and wedge test. The results indicate that the maximum lap-shear strength and durability of the bonding joints pretreated by different processes are influenced by the grade of abrasive papers and can be obviously improved by phosphoric acid anodizing. Alkali etching can obviously improve the durability of bonding joints although it slightly influences the maximum lap-shear strength. The process which is composed of grit-finishing, acetone degreasing, alkali etching and phosphoric acid anodizing, provides a better adhesive bonding property of Al alloy.
基金China Post Doctor Science Foundation(No. 20070420748)Fujian Provincial Natural Science Foundation of China(E0610032).
文摘The adhesion of single asperity contacting with a rigid flat is investigated. The microcontact model of the deformable asperity is established utilizing fractal geometry, which makes the resuRed adhesion model to relate with the surface characteristics that the asperity belongs to. The Dugdale approximation is utilized to consider the adhesive interaction within and outside the contact area. Then the model for solving the elastic-plastic adhesion of single asperity is presented by combing the Maugis-Dugdale（MD） model. To illustrate the necessity of considering the plastic deformation in microcontact, simulations of the relationship between the adhesive contact load and the interference of the asperity are performed. The result shows that the presented model is more suitable for the solution of the elastic-plastic microcontact of spherical asperity due to intermolecular adhesive interactions.
文摘Company Introduction: Xiongxian Huajiang Paper Plastic Package Co., Ltd. engaged in variety of flexible package. Our head office is located in Xiongan New Area of Hebei Province where is the most hopeful place in China for the next thousand years, it is the new developing focus in China. We have got the most convenient transportation, our factory is only 47 miles from Beijing, and 110 mils from the port of Xingang.
文摘Modern high performance adhesives are designed to offer an optimized balance of elasticity,toughness and plastic deformation capacity for the individual fields of application in e.g. the building and construction or transportation and vehicle industry. The long-term life prediction for adhesive joints based on laboratory tests requiring only days,weeks,or months is still a demanding challenge. Testing in practice is carried out with the intention of accelerating time dependent aging effects that may occur in a bonded joint during its service time. Initial strength values of bonded joints,such as shear or peel properties can often be obtained from the adhesive manufacturers or retrieved from literature. They are useful to compare different adhesives and to demonstrate the effect of parameters such as bond line thickness,overlap length or curing conditions,and,in some cases,the surface state. On the other hand only few data are available describing the mechanical long-term properties of adhesives related to creep and relaxation under static load conditions. Due to the nature of the polymer network of organic adhesives their viscoelastic-plastic deformation behavior is strongly time-and temperature dependent. The objective of this paper is to illustrate effective methods for investigating and predicting the creep and relaxation properties of adhesively bonded joints in the long-term region and for creating basic data for the design and engineering with adhesives.
文摘Municipal solid wastes from industrial plants were pyrolyzed in a fixed bed reactor to evaluate the influence of paper/plastic ratio and reaction time both on product quantity and quality. Raw materials have been pyrolyzed under nitrogen in a 3.0 dm^3 autoclave. Results show considerable differences in yields and quality of products obtained by pyrolysis of wastes with different paper content. Light and heavy oils were mixtures of organic compounds containing valuable hydrocarbons and oxygenated chemicals, while chars were rather composed of inorganic compounds from the raw materials. Longer reaction time of pyrolysis had produced higher non-condensable gas, water and light oil. Gases contained CO, CO2 and hydrocarbons, but the concentrations were very function of reaction time and paper/plastic ratio. Light and heavy oils showed similarities with middle distillates and heavy oils in refinery, the high paper content of the raw materials was unfavourable for longer storage of waste derived oils.
文摘随着柔性电子行业的发展,传统的PET、PEN等塑料衬底由于成本更高,光取出效率低下等问题已经无法满足人们的需求.纸张由于其获取途径广泛,成本低廉,更加轻薄是一种前景广阔的柔性衬底.通过浸渍涂布工艺,将环氧树脂与硫酸纸进行结合,制备了一种新的基材,即塑料纸.通过测试发现,塑料纸具有优异的光学性能、机械性能以及水和化学稳定.研究结果表明,通过环氧树脂涂布处理后,不仅提高了纸张表面的平整性,而且改善了纸张的润湿性.制备出的塑料纸光透过率高达88.25%,达到与PET基材同一水平,并且塑料纸的雾度达到62.9%,远远高于PET基材.塑料纸的拉伸强度为108.4 MPa,还兼具良好的水和化学稳定性.在大气环境下,基于发光电化池(LEC)的原理,成功地在塑料纸表面制备出有机发光器件,并实现均匀地发光.该器件的最大亮度为396.2 cd m^(-2),最大电流效率为0.64 cd A-1,是PET衬底的2.9倍,具有更加优异的光电性能.所研制的高透光率、高光雾度的塑料纸在柔性光电器件中具有很大的应用潜力.
