Hot Melt Sealants

Authored by: Ju-Ming Hung

Handbook of Sealant Technology

Print publication date:  August  2009
Online publication date:  August  2009

Print ISBN: 9780849391620
eBook ISBN: 9781420008630
Adobe ISBN:

10.1201/9781420008630-c9

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Abstract

Sealants should have good adhesion properties to different substrates and also provide the necessary physical properties to fill the gap between substrates. They serve as a barrier to exclude dust, dirt, moisture, chemicals, and air in end-use environments. Sealants can also serve to maintain a pressure differential between internal and external environments to attenuate mechanical shock and vibration. Since the applications of adhesives and sealants are different, the requirements for the mechanical strength of sealants are generally lower than those for adhesives. Therefore, sealant formulations usually contain large amounts of filler for cost reduction and gap-filling purposes.

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