Лако-красочные материалы — производство

Many adhesives are suited for the bonding of metals used in mechanical engineering. Epoxy resins and acrylics are particularly well suited. Bonding is mainly used for the production of composite materials, where welding cannot be used. Plain steel, low — alloy steel and high-alloy steel, as well as different aluminum and casting alloys, are the […]

In mechanical engineering and process equipment construction, welding and joining by screws are still the first-choice joining techniques. Adhesive bonding is suitable for small series production because only minor equipment is required for this technique. Fast-setting adhesives that can be applied without costly devices (such as autoclaves and/or mixing and metering units) are preferred. The […]

It is of utmost importance that the adhesive has good mechanical properties when optical lenses and prisms are bonded to mechanical fixtures and mounts. As the bonding area is usually smaller than in the case of optical cementing, the mechanical strains are much higher. The dimensions ofthe elements, the temperature range and the coefficients of […]

Optical systems have a higher resistance to the environment and better long-term stability when the surfaces in the ray path are kept small. When the optical cement is applied in a very thin layer, the elements can be placed with very high accuracy. An optical cement is a highly transparent adhesive that bonds the optical […]

When fixing the glass elements, they must be fixed in the desired position as rapidly as possible. Hot melts (also known as ‘optical pitch’, ‘sealing wax’ or simply ‘wax’) are very popular owing to their high curing rate and solubility in organic solvents. In optical components, strains are induced by shrinkage of the adhesive during […]

Adhesives used to temporarily fixture glass elements to allow processing are required to cure within seconds, without shrinking. After processing, they are required to debond quickly, without harming the surfaces. Whilst conventional adhesives are not suited to this task, hot melts do meet the requirements of this application, provided that no strains are produced in […]

In the optical manufacturing industry, adhesives are employed for three different tasks that are completely independent from each other: (i) the temporary blocking of glass elements to allow processing; (ii) optical cementing; and (iii) the bonding of optical elements into mounts. According to the desired application, optical adhesives or cements must fulfill different requirements. 8.8.1

Transfer tapes with different functionalities are frequently used in the electronics industry to bond dissimilar surfaces (Figure 8.60). Acrylic-based PSA tapes offer exceptional holding forces as well as excellent durability, sealing properties and shock resistance. They are used, for example, in the assembly of circuit boards and for the bonding and sealing of underwater cameras. […]

The electrical characteristics of electronic components with solder bumps such as flip chips or ball grid arrays (BGAs) must remain stable in the long term. However, heat cycles, vibrations or direct mechanical stress used to have a negative effect on the durability. When these components are soldered onto a circuit plate, any gaps will remain […]

A most versatile option to make an electrical interconnection between two or more contact points is to use electrically conductive adhesive films that contain graphite fiber nonwovens or metal/metallized particles. These not only allow the use oflighter materials and flat design, while improving the reliability of the finished products Figure 8.59 A polyethylene terephthalate (PET) […]