Silicones used in adhesive and sealant applications can provide good bonding to substrates without the use of primers or surface modification techniques, such as corona, flame and plasma treatments; but some situations require the use of these additional components and/or processing steps to significantly boost adhesion to substrate surfaces.
is the first of two articles addressing the role that low-molecular-weight
polyolefins and wax additives have in the formulation and performance of
hot-melt adhesives. This part examines wax additives available to the
formulator; their composition, characteristics, and manufacture; and general
information about their use. Part two will address specific characteristics of
various types of polyolefins and their role in hot-melt adhesives, including
the globe, agitator mixing, or mechanical agitation, is the most common mixing
technique in the liquid-processing industry. This type of mixing is less
expensive than other methods, offers more portability, is more easily
available, and there are many variations for industry to choose from.