Formulated Polymer products paved the way for wet bond adhesive. These kinds of adhesives basically involve different
types of polymer products. The most common would be elastomeric and
thermoplastics. These polymeric
materials would undergo the dispersion and dissolving process in a systematic
phase. During lamination, the materials
will be joined while the adhesive is still wet.
The bond formation is due to the evaporation of water or during liquid
absorption. The furniture making,
packaging, and paper manufacturing industry have found the wet bond adhesive a great addition to their industry.
What is Wet Bond
Adhesives?
In most cases, these wet bond adhesives are starch-free. It made it possible to remove any food
allergens issues. It was named based on
their process wherein the adhesive is utilized to laminate things in a wet form.
It gives an adequate bond to porous objects, especially those made with paper.
Where Is It Commonly Used?
The wet bond adhesive
is typically used in food packaging, collapsible boxes, overlays, and
overwraps. It will pass through a drying
tunnel, which is a part of the lamination process during the drying
process. This type of adhesive is
specifically designed for film and foil lamination to a paper product. The primary purpose is to bond the paper
product into the film and maintain the same bond while it is being used. This adhesive
is also found beneficial to fabrics, wood, leather, and other porous materials.
Packaging Process
The wet bond adhesive
suppliers now produce special laminated products to meet the demands of the food packaging industries. Most of these food products are
microwaveable. For this type of product,
the adhesives must meet specific qualifications and requirements. A vacuum or an evaporation procedure will
remove the monomer, oligomers, and other low molecular weight elements present
during manufacturing the polymer.
The type of adhesive that is
usually part of the flexible packaging process is vinyl acetate, acrylic, VAE,
VAA (Vinyl Acetate Acrylic), polychloroprene, and MDP. To be an effective adhesive, it must contain a
high viscosity rate, a reduced surface tension, machinability, etc. It
also needs to be porous to allow the escape of water during the process. One of the challenges in using a wet bond
adhesive is maintaining a nice damp edge on the foil or the film while laminating
the paper. Regardless of the machine's
humidity or temperature, the wet bond adhesive must reach the desirable wetness
on its edges.
The significant advantage of
this type of adhesive is that it contains no VOC, also known as a volatile
organic compound. The cleanup of the
adhesive is also proven easy since you only use water to clean the excess
adhesives. Major wet bond adhesive suppliers include H.B. Fuller, Henkel,
Air
Products, BASF, Rohm
and Haas, etc.
note; pictures are for breaking up the paragraphs only. They are not in any way related to wet bond adhesives.
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