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Low Viscosity Polyvinyl Alcohol (PVOH) Adhesives for Sealing Cartons

Adhesives Formulation

Applicable Type

Waterborne Adhesives

Applicable Base Polymer

Polyvinyl Alcohols (PVOH)

Applicable Base Polymer Properties

Polyvinyl alcohol resins are water soluble. Non-toxic and biodegradable, polyvinyl alcohol (PVOH) adhesives are an excellent choice in food or general paper packaging as well as paperboard manufacturing. Developed to laminate or bind various paper and paperboard products, PVOH adhesives wet out fast to grab and bond quickly. Often used in the manufacturing of composite cans, tube winding, corrugated board and corner guards for boxes, polyvinyl alcohol has exceptional film forming, emulsifying and bonding properties. More economical and easier to use than dextrin and other synthetics found in some paperboard manufacturing, PVOHs are sometimes filled with clay to create a firm core in cans, tubes and cardboard with impressive crush strength.

Typical Formulation Ingredients

Phase

Ingredient

Parts by weight

Polyvinyl alcohol (Vinol SM-73, Air Products)

xxx

Filler (ASP-100 aluminum silicate)

xxx

Dispersant

Water

xxxx

Typical Properties

Properties

Viscosity, cps @ 25°C (#3 spindle, 12 RPM)

xxxxxxx

Density, lbs / gallon

xxxx

xxx

Processing

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Resulting Properties

The low viscosity of this adhesive and its fast setting capability provide an excellent adhesive for sealing of boxes, cartons, and paper bags. Waterborne PVOH adhesives for case sealing have good flexibility, low temperature properties and adhesion to coated papers. PVOH adhesives are notable for their low degree of permeability. These adhesives provide a low to medium performance relatively inexpensive adhesive that dries quickly.

In food packaging, polyvinyl alcohol adhesives are FDA approved as an adhesive for indirect food contact. PVOHs are tasteless, odorless and can be used on their own or blended with polyvinyl acetate emulsions for a faster set.

The source of Low Viscosity Polyvinyl Alcohol (PVOH) Adhesives for Sealing Cartons formulation is Adhesives Formulary Handbook, NIIR Board, Asia Pacific Business Press, Inc., 2010, p. 140.

Tips and Tricks

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