Adhesives | With and without the power of nature
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adhesives are in modern Connection Technology indispensable. They offer innovative solutions for industrial production. Current developments on the market present advanced adhesives that offer increased strength, flexibility and temperature resistance. These innovations optimize production processes and enable reliable connections.
Content
- Liquid gasket, adhesive and potting compound for filter technology
- Dispenser for anaerobic adhesives tested in long-term tests
- Bionics: hygroscopic adhesive from the spider's web
- Ceramic adhesive for high vacuum technology connects to 1370 ° C
- Solar collectors glue and seal securely
Other adhesives
Liquid gasket, adhesive and potting compound for filter technology
10.02.2022/XNUMX/XNUMX | Air filters, HEPA filters, oil filters and hydraulic filters must be optimally suited to the respective application in their various designs. Decisive for the performance and the economic production of the Filter are sealing foam, adhesive system and casting compound and their process-reliable processing.
Dispenser for anaerobic adhesives tested in long-term tests
09.07.2020 | Anaerobic adhesives are one-component or 1K adhesives that harden when not exposed to air. This is one of the two mechanisms for hardening when handling 1K adhesives. Combined with the second mechanism, contact with metal ions, the material is quickly polymerized. Preflow by Viscotec has carried out a long-term test for this purpose.
Bionics: hygroscopic adhesive from the spider's web
14.04.2020 | Interface moisture can cause problems when bonding outdoors or in humid environments. Industry association adhesives (IVK) uses a model from nature or bionics to show that adhesives and moisture can also work well together. They are guided by the principle of spider webs. Spiders hold their prey in their webs, even when the humidity is high or it is even raining.
Kick Interfacial moisture the connection between two surfaces such as tiles and adhesive loosens and the tiles fall off. The example from bionics shows that this does not have to be the case. The spiders use a special glue that they distribute drop by drop onto the silky threads of their webs. A team of researchers from the University of Akron in the USA has now investigated the secret of the adhesive.
Bionic robot arm for human-robot collaboration
They came to the conclusion that the Glue of the spiders composed of three elements - two glycoproteins, which consist of amino acid and sugar molecules, a collection of low molecular weight organic and inorganic compounds, also called hygroscopic molecules, and water.
Bionic adhesive effect revealed
The Glycoproteins are responsible for the adhesive effect that hygroscopic molecules assume a previously unknown function, which the researchers have decoded. They bind accumulated water and pull it into the mass. The adhesive force between the adhesive and the surface remains. Together, glycoproteins and hygroscopic molecules achieve good adhesion of the spider prey to the web, even under moist conditions.
The knowledge gained is a nice basis for bionics. Engineers can incorporate this into the development of moisture-resistant adhesives. Structures that are used in a damp environment could be connected with an adhesive based on this natural principle.
Ceramic adhesive for high vacuum technology connects to 1370 ° C
04.04.2012 | Modern ceramic-based adhesives create bonds that hold securely even under extreme operating conditions. The high-tech adhesive Ceramabond 890 is specially designed for the material pairings ceramic-ceramic and ceramic-graphite, which Kager recently added to its broad adhesive portfolio. This 1K silicon carbide adhesive can be used to create chemically and mechanically resilient high-temperature connections.
The one-component system Ceramabond 890 (Aremco) is a Silicon carbide adhesive, which is used for the secure joining of ceramic and graphite components in High vacuum-devices. It is suitable for joining applications with operating temperatures of up to 1370 °C.
Typical applications Examples include the manufacture of gas igniters and resistance heaters, the production of catalytic converters or thermally resistant threaded closures, and the manufacture of vacuum components, strain gauges or temperature sensors. The single-component system is also suitable for the assembly and electrical insulation of ceramic and graphite components, as well as for use as a protective coating. It is also recommended for the construction of high-temperature housings for ovens and boilers.
The maximum thermal expansion of Ceramabond 890 For example, at 1370 °C it is only 4,4 10-6 K and its dynamic viscosity is 49.000 mPas. Its density gives the manufacturer with 2,18 g / cm3 Torque resistance is in the middle range with 14,24 Nm. The moisture, alkali and acid resistance of Ceramabond 890 is considered good.
The use of grey matter does not pose any major problems in practice. Thickness The thickness of the applied adhesive layer should not be less than 0,05 mm and not more than 0,2 mm in order to achieve an optimal result. Ceramabond 890 is air-dried after just one hour; curing is usually complete after about 2 hours. The shelf life is six months.
Solar collectors glue and seal securely
12.10.2011/XNUMX/XNUMX | With the new ones 1K and 2K silicone-Adhesives and sealants from Tremco Illbruck Thermal collectors can be manufactured more quickly than using EPDM sealing profiles. As new developments for the proven Pactan brand, they impress in use with their extreme durability and weather resistance and with the permanently secure and flexible connection between glass and element frame.
Source: This article is based on information from the following companies: IVK, Kager, Tampf, Tremco Illbruck, Viscotec.
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Angela Struck is editor-in-chief of the development scout and freelance journalist as well as managing director of Presse Service Büro GbR in Ried.
