Energy savings plus mechanical reinforcement and rheology control

Waterproof PVOH Adhesives for Laminating Solid Fiber

Adhesives Formulation

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 resins have 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)

Filler (ASP-100 aluminum silicate)

Water

Typical Properties

Properties

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

xxxx

Density, lbs / gallon

xxx

Processing

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Resulting Properties

The viscosity of this adhesive and its fast setting capability provide an excellent adhesive for sealing of solid fiber laminates. This adhesive formulation will make paper bonds that will tear 100% fiber after 24 hrs immersion in room temperature water. This adhesive also has good wet tack properties. Waterborne PVOH adhesives have good flexibility, low-temperature properties and adhesion to coated papers. PVOH adhesives are very resistant to oil, grease, and solvents while maintaining high tensile strength and flexibility. PVOH adhesives are also 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. (Source: Adhesives Formulary Handbook, NIIR Board, Asia Pacific Business Press, Inc., 2010, p. 149.)

Tips and Tricks

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