Relationship between surface energy and adhesion strength in polyethylene—paper composites

This work reports adhesion behaviour of polyethylene on paper, and deals with the surface energy of the materials involved in the manufacture of these composites, and its influence on the adhesion strength, at constant roughness, for the paper substrates. The surface energy of different papers treated with various sizing agents was determined by measuring contact angles according to the Owens-Wendt method. The peeling energy was shown to follow a linear relationship versus the reversible energy of adhesion. This result is explained by the fact that rupture takes place at the interface and that the size of the defect at the interface depends on the spreading coefficient. Corona treatment, applied to strongly sized papers before making the composites, restored the adhesion strength to its original range of values, again demonstrating the thermodynamic character of adhesion in thermoplastic-paper composites.     

铜和铝作为钛—钢爆炸焊接夹层时的复合工艺及焊接界面的实验研究

文章介绍了铜、铝作为钛－钢爆炸焊接夹层时的复合工艺，并对实验中的各种界面进行了超声探伤、扫描电镜及能谱分析，认为与铝相比铜更适合于作钛－钢爆炸焊接的中间夹层。     

鞍形薄膜结构的风振响应分析及风振系数

对鞍形曲面薄膜结构的风振响应进行了比较详细的参数分析，对该类结构的风振系数进行了初步研究，并给出了风振系数的初步建议值，所得到的一些结果可供工程实践参考。     

民营纸业的发展及对策

进入新世纪，特别是在我国加入WTO后，民营纸业能否持续发展，如何发展，本文对此进行了分析与探讨。     

赤天化纸业竹浆纸一体化的探索

介绍了赤天化纸业在西部大开发的背景下,对竹浆纸一体化的认识和一些具体运作方法,以及在运作中所遇到的困难和需要探索的问题.     

Blast-resistant structural concrete and steel connections

A series of numerical studies were conducted on the behavior of structural concrete and structural steel connection subjected to blast loads. These studies gradually enhanced the understanding of the role that structural details play in affecting the behavior. Observations from those studies highlighted possible safety concerns with current blast design procedures. Conclusions and recommendations are provided for correcting the observed problems.     

底网针刺毯生产中影响产品质量的因素

BOM毯具有比BOB毯优越的性能 ,在造纸工业中应用日趋广泛。文章分析了BOM毯生产中影响其质量的因素 :刺针、针板、针刺机、单丝底网织造和定型等 ,对由BOB毯转产BOM毯的生产厂提出了改造建议     

柯达RA彩色相纸高温快速冲洗工艺的技术控制

本文介绍了柯达彩色相纸的RA超快速冲洗工艺，包括其中冲洗工艺条件，冲药配制方法和注意事项，冲洗加工过程中的质量控制以及冲洗加工中常见故障和弊病的检测，分析和处理方法。     

AutoCAD中布局与浮动视口的应用

布局与浮动视口为对在AutoCAD中创建的模型对象进行合理的打印提供了极大的方便,巧妙利用布局和浮动视口强大的功能,可以根据需要在图纸上对模型对象进行任意的组织和布置,得到想要的效果。     

潮汕传统建筑的技术特征简析

潮汕传统建筑具有高度的自然适应性,独特的地理条件、显著的气候特点、丰富的建筑材料,造就了独具特色的潮汕建筑技术。本文从防潮防蛀、防风防雨、抗震抗灾三个主要方面论析了潮汕传统建筑的技术特征。