China
Africa
Explore chapters and articles related to this topic
Insulation materials
Published in Arthur Lyons, Materials for Architects and Builders, 2019
Aluminium foil is frequently used as an insulation material in conjunction with organic foam or insulating gypsum products. It acts by a combination of two physical effects. First, it reflects back incident heat due to its highly reflecting surface. Second, owing to its low emissivity, the reradiation of any heat that is absorbed is reduced. Thin aluminium reflective foil insulation can be inserted between studs, joists or rafters, leaving a 25 mm air gap on either side. In addition to insulation, it acts as an air infiltration and vapour barrier.
Use of Conventional Manufacturing Techniques for Materials
Published in T. S. Srivatsan, T. S. Sudarshan, K. Manigandan, Manufacturing Techniques for Materials, 2018
T. S. Srivatsan, K. Manigandan, T. S. Sudarshan
The sheets of steel chosen for use for the bodies of automobiles and appliances are typically around 0.7 mm thick. The beverage cans are made from aluminum sheet that is 0.28 mm thick. Aluminum foil that finds wide use in the kitchen has a thickness of 0.008 mm (0.0003 in.).
Filter Components—the Capacitor
Published in Richard Lee Ozenbaugh, Timothy M. Pullen, EMI Filter Design, 2017
Richard Lee Ozenbaugh, Timothy M. Pullen
The two subgroups are metallized and foil. For the metallized style, the dielectric is coated with a thin spray of metallized aluminum that becomes the plate of the capacitor. The other subgroup is aluminum foil. The typical aluminum foil thickness is 0.00023 inch, or 0.23 mil. This foil is much thicker than the film, which is measured in microns. Foil will carry much more current and is therefore better for pulse applications and EMI filters where there are high harmonic currents from off-line regulators and similar harmonic sources. Most EMI filters are built with this type of construction and have a thicker aluminum foil if higher currents are expected. Just as the dielectric can have several layers for higher voltages, the foil can either be thicker or also layered. The metallized film has several advantages, however. This capacitor can be much smaller for the same capacitor value, and this type is self-healing. All dielectrics have small pinholes throughout their length. When the applied voltage stresses the film, the film often shorts out through one of the pinholes, causing the film to melt. The aluminum on the metallized film will then re-form, making the capacitor self-healing. Another advantage of this subgroup is that the aluminum can be sprayed on both sides of the metallized dielectric. This adds to the smaller size, promotes self-healing, and is better for extended life.
Sustainable requirements and value proposition for milk Ultra-high temperature (UHT) packaging
Published in Supply Chain Forum: An International Journal, 2020
Cristian Camilo Aparicio-Peralta, Ana X. Halabi-Echeverry, Alejandro Puentes-Parodi
The eco-design set of tools makes it possible to judge and compare different product concepts based on characteristics such as a) energy, b) recyclability, c) hazardous waste content, e) durability, f) repairability and g) price. Energy comparisons can compromise the eco-design result when the amount of energy used to manufacture the material is unknown. Since these tools compromise the environmental concept of the product, from the starting point related to manufacturing up to the point of usage, recycling and disposal, it is necessary to increase the service possibilities of the materials understanding current packages (rigid and flexible forms). Figure 4 shows the regular composition of Tetrapack® rigid packaging, which consists of different layers that provide durability and portability to food:Paperboard: Is the main material in cartons. It provides stability, strength and smoothness to the printing surface.Polyethylene: Protects against outside moisture and enables the paperboard to stick to the aluminium foil.Aluminium foil: Protects against oxygen and light to maintain the nutritional value and flavours of the food in the package in ambient temperatures.