Modified silanes (MS) are odourless, non-corrosive and do not contain isocyanates, solvents, silicones or PVC. They are normally available as single-component adhesive sealants (although two-part systems are also available) and require atmospheric moisture during the cure cycle. When fully cured they are a flexible elastomeric product with excellent adhesion properties to a wide range of […]
Архивы рубрики ‘Practical Guide to. Adhesive Bonding of Small. Engineering Plastic and. Rubber Parts’
Polyurethane Adhesive Sealants
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Polyurethane adhesives for plastics are available primarily in both single-component and two-component forms. They are very tough, flexible products with excellent peel strength and are also extremely versatile for the bonding of larger plastic components. Many grades of polyurethanes are certainly adhesives and not just sealants and most automotive windscreens are now bonded in with […]
Polyurethane Adhesive Sealants
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Polyurethane adhesives for plastics are available primarily in both single-component and two-component forms. They are very tough, flexible products with excellent peel strength and are also extremely versatile for the bonding of larger plastic components. Many grades of polyurethanes are certainly adhesives and not just sealants and most automotive windscreens are now bonded in with […]
Silicone Adhesive Sealants
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Single-component silicone adhesives are usually RTV based and so cure slowly in the presence of atmospheric moisture. The RTV will release a by-product during the cure cycle and the most common of these is acetic acid. These ‘acetoxy’ curing silicones will skin over in about 15-20 minutes and achieve a full depth of cure of […]
Silicone Adhesive Sealants
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Single-component silicone adhesives are usually RTV based and so cure slowly in the presence of atmospheric moisture. The RTV will release a by-product during the cure cycle and the most common of these is acetic acid. These ‘acetoxy’ curing silicones will skin over in about 15-20 minutes and achieve a full depth of cure of […]
Flexible Adhesive Sealants
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Somewhere in the whole catalogue of adhesive families, the product is classified as a ‘sealant’ and not necessarily as an ‘adhesive’. The application itself will tend to define the difference as much as the generic adhesive type. Very often, in order for a sealant to successfully fulfil its function, it must offer a good degree […]
Advantages and Disadvantages of Epoxies
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Advantages include the high bond strength, adhesion to a wide range of materials and excellent solvent and water resistance. Epoxies will fill large gaps, which is a distinct advantage over cyanoacrylates and reactive acrylics. Epoxies are widely used and generally lower cost than UV or cyanoacrylates. They can often be the most durable and toughest […]
Epoxies
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Epoxies are thermoset products normally prepared by mixing a resin and a hardener or curing agent. The mixing can be achieved by mixing the correct quantities by hand on a small pallet (Figure 1.23) or (more usually for production applications) by dispensing directly from the original containers via a helix nozzle (Figure 1.24). Precise measuring […]
Two-part Acrylics
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Two-part acrylics are available either as two-part resins or as a resin for Part A with Part B as a liquid activator. The two-part resin products are formulated with Part A and Part B of similar viscosities and designed to be dispensed as bead-on-bead or mix-in-the-nozzle. Two-part acrylics (also referred to as methyl methacrylates or […]
Benefits of UV Adhesives
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UV adhesives offer the following advantages to the user: • Speed of cure — usually less than 30 seconds thus allowing increased productivity, • Cure on demand — the adhesive only cures when exposed to light thus allowing time for the alignment of component parts, • Optical clarity — most of the UV adhesives are […]