摘要:
A composite lenticular film includes a first layer having a first refractive index, and a second layer having a second refractive index less than the first refractive index. The second layer is integrally attached to the first layer. The first layer has at least one row of protruding lenses.
摘要:
The invention provides a method and apparatus of applying ultrasound energy in wet treatment of textiles, particularly in a dyeing process. By keeping the articles to be dyed within an optimal zone of the sonoreactor, the method achieves a high dyeing efficiency, making it possible to dye at a low temperature, with little or no use of chemical assistants while achieve a dyeing quality comparable with conventional dyeing method relying on high temperatures and/or use of chemical assistants. The apparatus suitable for practicing the method uses a conveyor belt having two layers of meshes between the articles to be dyed are sandwiched exerting no tension on the articles. The conveyor belt can be configured to travel within the optimal zone of the sonoreactor, whereby constraining the articles under dyeing within the optimal zone. With such a conveyor belt, small pieces of articles can be dyed just as easily as the large ones.
摘要:
Polypyrrole (PPy) is one of the most commonly studied conducting polymers due to its good stability, high conductivity, ease of preparation and non-toxicity. The stability of the conductivity of polypyrrole films depends on the choice of dopant anion, the method of preparation, and the conditions of aging. Most of the existing methods only improve stability by sacrificing conductivity, as well as sensitivity. This invention provides a method for coating conducting polymer onto a substrate by first applying an anionic dopant and an oxidizing agent onto the substrate. The monomer is then allowed to form the conducting polymer at about −10 to −80° C. for a sufficient period of time. After storage for a long period of time (nearly a year), the conductive polymer coating still retains almost the same strain sensitivity and at least up to 85% of its initial conductivity.
摘要:
Existing pressure sensing fabrics may involve two portions, i.e., insulating and conductive portions in the fabric, which increases the complexity of the fabric system and more important, and the instablization of the resistance-strain relationship during dynamic deformation which limits the application fields due to intrinsic properties difference between the two portions. These fabrics commonly employ two or more layers to accomplish the detecting functions. Such arrangements increase the thickness, weight, and cost of the sensors with some other disadvantages such as low accuracy, instability, etc. This invention describes a pressure sensing fabric have a general structure as simple as a plurality of electrically conducting yarns forming interlocking loops of yarns. The pressure sensing fabric is found not only be able to sense pressure but also the magnitude of the pressure.