Energy savings plus mechanical reinforcement and rheology control

PVAc Case Sealing Adhesives (Side-Seam Adhesive)

Adhesives Formulation

Applicable Type

Waterborne Adhesives

Applicable Base Polymer

Polyvinyl Acetate Emulsions & Derivatives (PVAc)

Applicable Industrial Sectors

Carton closure (packaging user)

Applicable Base Polymer Properties

Waterborne polyvinyl acetate adhesives for case sealing utilize the same base latex resin that is used in wood glues. These adhesives provide a low to medium performance, inexpensive adhesive that dries to a relatively rigid, porous material. A typical formulation consists of polyvinyl acetate latex, filler (if greater viscosity is desired), plasticizer (for improved flexibility), and water. Since these adhesives set by evaporation, they shrink more on drying than 100% solids adhesives.

Typical Formulation Ingredients

Ingredient

Parts by weight

Daratak 71 general purpose PVAc emulsion (Ownesboro Specialty Polymers)

Daratak 17-300 low molecular weight PVAc emulsion (Ownesboro Specialty Polymers)

Butyl benzyl phthalate plasticizers

1,1,1 – Trichloroethane

Water

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(Source: Owensboro Specialty Polymers, Inc.)

Processing

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Resulting Properties

The low viscosity of the PVAc water emulsion and its fast setting capability provide an excellent adhesive for sealing of corrugated boxes and cartons. The table above provides a formulation for a polyvinyl acetate adhesive that will provide a fast set and good penetration into the corrugated cardboard substrate. The latex adhesive dries to a somewhat rubbery film by virtue of the plasticizer component. The adhesive has good resistance to water and good adhesion to most substrates.

Tips and Tricks

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