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raw materials & chemicals > Glues and adhesives

Glues and Adhesives

An adhesive is a material, typically liquid or semi-liquid, that adheres or bonds items together. Adhesives come from either natural or synthetic sources. The types of materials that can be bonded are vast but adhesives are especially useful for bonding thin materials. Adhesives cure (harden) by either evaporating a solvent or by chemical reactions that occur between two or more constituents.

Adhesives are also very useful for joining thin or dissimilar materials, minimizing weight, and providing a vibration-damping joint.A disadvantage of most adhesives is that most do not form an instantaneous joint, unlike many other joining processes, because the adhesive needs time to cure.

Historically, the term "glue" only referred to protein colloids prepared from animal flesh. The meaning has been extended to refer to any fluid adhesive.

There are many adhesive substances that are considered or commonly referred to as "glue":

  • Animal proteinbased adhesives
  • Plant-based glues
  • Synthetic monomerglues
  • Synthetic polymer glues.
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