Лако-красочные материалы — производство

The typical maximum operating temperature of a standard ethyl cyanoacrylate is 85 °C to 100 °C and the bond strength can fall rapidly after 100 °C (Figure 1.6). Figure 1.6 Hot strength of a standard ethyl cyanoacrylate — measured on steel lap shears Allyl based cyanoacrylates were developed to improve the hot strength but these […]

Cyanoacrylates can be toughened by the addition of rubber particles. The standard methyl or ethyl cyanoacrylates can have poor impact strength and low peel strength but modified ethyl cyanoacrylates were developed in the mid 1980s that show superior peel strength and often high humidity resistance. The principle of toughening the adhesive is that the rubber […]

Some substrates, for example paper, cork, cardboard, leather, dichromated metals and some fabrics, can be slightly acidic and this surface acidity will result in a very slow cure or in some circumstances inhibit curing completely. For these acidic substrates, a surface insensitive grade of cyanoacrylate must be used to ensure proper cure. The surface insensitive […]

Ethyl and methyl cyanoacrylates have a sharp odour and are eye and nasal irritants, especially in enclosed spaces or where large volumes of cyanoacrylate are present. This high volatility of cyanoacrylates can lead to the formation of a white ‘bloom’ adjacent to the bond line (see Section 10.2.6). Alkoxy ethyl cyanoacrylates with a high molecular […]

Ethyl and methyl cyanoacrylates have a sharp odour and are eye and nasal irritants, especially in enclosed spaces or where large volumes of cyanoacrylate are present. This high volatility of cyanoacrylates can lead to the formation of a white ‘bloom’ adjacent to the bond line (see Section 10.2.6). Alkoxy ethyl cyanoacrylates with a high molecular […]

With a smaller molecule size the methyl cyanoacrylates have better affinity to metals and can sometimes offer better resistance to solvents. The methyl grades of cyanoacrylate would often be specified for bonding plastic to metal or rubber to metal applications. The basic monomer is a very thin (low viscosity) liquid typically around 3-5 mPa-s. These […]

There are many different types of cyanoacrylate and so when designers are contemplating the use of an adhesive for specific project, they have to consider which type is mostappropriate — especially when it comes to production considerations and performance criteria. The following types of cyanoacrylate will be discussed in this section: • Ethyl, • Methyl, […]

Cyanoacrylates are one of the most widely used adhesives for bonding small plastic parts. In liquid form cyanoacrylates or ‘super glues’ are stored in high-density polyethylene bottles to minimise the ingress of moisture into the liquid. These adhesives are generally available as colourless liquids and grades vary in viscosity range from 3 milliPascal seconds (mPa-s) […]

Cyanoacrylates are one of the most widely used adhesives for bonding small plastic parts. In liquid form cyanoacrylates or ‘super glues’ are stored in high-density polyethylene bottles to minimise the ingress of moisture into the liquid. These adhesives are generally available as colourless liquids and grades vary in viscosity range from 3 milliPascal seconds (mPa-s) […]

Choosing the best adhesive grade for a production application can be an exacting design task. This is especially true when joining dissimilar materials and when bonding certain engineering plastics. Adhesives can provide the optimum — indeed often the only — assembly method. However, it is all too often that the adhesive is not fully considered […]