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Animal Glues: An aqueous adhesive that has been produced
commercially, since the 17th century. Animal glues are made from
collagen and gelatin, the raw materials generally come from the
bones and joints of cattle. These glues are an old standard in the
adhesives industry and are still extensively used today in the
woodworking industry, and in the gummed tape industry as well.
Epoxy Resins: These structural adhesives first came about in the mid
20th century. Epoxies are often two part mixtures that typically
consist of a bisphenol A or epichlorihydrin. After mixing the two
parts of the epoxy, there is a limited amount of time that the user
has to apply the epoxy to the joint, this could be considered one
limitation of epoxies, although they do have excellent strength.
Polyvinyl Acetal: This adhesive has been made for approximately 50
years and is a product that is best known for its ability to adhere
to many different adherends. It is widely used in applications where
it is applied to both sides of a sheet of glass to make safety glass.
It is very strong and flexible.
Hot Melts: Hot melt adhesives are generally made from low molecular
weight polyolefins with reasonably low melting points. Hot melt
adhesives are capable of setting up in a very short amount of time
compared to other adhesives, therefore would allow for increased
production. No hazardous materials introduced into the environment,
allows for less cost for solvent recovery.
Polyvinyl Alcohol: PVOH is offered by a large number of
manufacturers and in many different grades. It is often used in the
U.S. as a paper sizing agent, and as an adhesive that is best suited
to be used in an emulsion form as a binder for paper or wood
products.
Acrylic Adhesives: Known for several good properties, such as high
flexibility at low temperatures, it can adhere to a wide variety of
materials, cheap, safe, durable, and has good resistance to water.
They are often used in applications where a high bond strength is
required. Acrylics are often used in pressure sensitive adhesives
where high bond strength is required. It is often used as an
adhesive for tile flooring.
Anaerobic Adhesives: These adhesives will last for a long time in
storage at room temperature in the presence of oxygen, but when the
adhesive is pressed between two objects in the presence of limited
oxygen, they will begin to cure and form very strong and durable
bonds that are long lasting. Some applications include threadlocking
and liquid gaskets.
Cyanoacrylate Adhesives: Cyanoacrylates are used in large volumes
today in applications that are difficult to assemble or hard to get
to. Most applications are used in single drop applications.
Cyanoacrylates will cure in the presence of oxygen and water, and is
more commonly known as Super Glue.
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- The guide to polymer processing technology,
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