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Natural adhesives are made from organic sources such as vegetable starch , natural resins, or animals (e.g. the milk protein casein [37] and hide-based animal glues). These are often referred to as bioadhesives. One example is a simple paste made by cooking flour in water.
Rubber cement (cow gum in British English) is an adhesive made from elastic polymers (typically latex) mixed in a solvent such as acetone, hexane, heptane or toluene to keep it fluid enough to be used. This makes it part of the class of drying adhesives: as the solvents quickly evaporate, the rubber solidifies, forming a strong yet flexible bond.
Adhesive bonding is a joining technique used in the manufacture and repair of a wide range of products. Along with welding and soldering, adhesive bonding is one of the basic joining processes.
Pressure sensitive adhesives are viscoelastic polymers with their rheology tuned to the desired bonding and de-bonding characteristics needed. [5] Typical materials used to make the adhesive include: acrylate polymer, [6] rubber, either natural rubber or synthetic thermoplastic elastomer [7] silicone rubber; and others
Cyanoacrylate glue's ability to resist water has made it popular with marine aquarium hobbyists for fragmenting corals. The cut branches of hard corals, such as Acropora, can be glued to a piece of live rock (harvested reef coral) or Milliput (epoxy putty) to allow the new fragment to grow out.
Wood glue is an adhesive used to tightly bond pieces of wood together. Many substances have been used as glues. Traditionally animal proteins like casein from milk or collagen from animal hides and bones were boiled down to make early glues. They worked by solidifying as they dried.
The use of PVAc on the Archimedes Palimpsest during the 20th century greatly hindered the task of disbinding the book and preserving and imaging the pages in the early 21st century, in part because the glue was stronger than the parchment it held together. [7] In handicrafts. As envelope adhesive. As wallpaper adhesive.
Animal glue in granules. Animal glue is an adhesive that is created by prolonged boiling of animal connective tissue in a process called rendering. [1] In addition to being used as an adhesive, it is used for coating and sizing, in decorative composition ornaments, and as a clarifying agent.