Packaging sticking are essential for bonding packaging components together and ensuring packaged products remain sealed until the time of use. They provide the means of assembly for everything from simple paper or cardboard cartons to sophisticated multi-layer laminated and coated packaging structures. The primary function of a packaging adhesive is to join packaging parts and maintain bond strength under the handling and distribution conditions the package will experience.

Types of Packaging Adhesives

There are several main categories of adhesives used for bonding packaging materials:

Hot Melts

Hot melt adhesives are applied in a molten state and bond instantly upon cooling. They are 100% solid and do not contain solvents, making them an environmentally friendly choice. Hot melts bond quickly and securely, making them well-suited for high-speed packaging operations. Common hot melt formulations include ethylene vinyl acetate (EVA), polyolefin, and polyamide.

Water-Based

Water-based Packaging Adhesives contain water as the primary solvent along with various polymers, resins, and additives. They have excellent bond strength for many substrates and dry quickly through evaporation. Water-based adhesives are non-toxic and produce little or no VOCs, though special formulations may be needed for moisture or water resistance. Common versions include acrylic, polyvinyl acetate (PVA), and styrene-butadiene rubber (SBR) emulsions.

Solvent-Based

Utilizing solvents such as toluene or xylene, solvent-based adhesives provide very high initial tack and high-strength bonds. They work well on difficult-to-bond substrates like plastic films, foils, and rubber. However, solvent-based products require ventilation during use and may contain VOCs, so water-based or hot melt alternatives are increasingly preferred where regulations allow. Common resins include polyurethane, styrene-butadiene rubber, and nitrocellulose.

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