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Journal articles
Improved extrudable hot-melt melt adhesive for lidding, TAPPI JOURNAL, August 1997, Vol. 80(8)
Improved extrudable hot-melt melt adhesive for lidding, TAPPI JOURNAL, August 1997, Vol. 80(8)
Journal articles
High-barrier packaging with liquid crystal polymers, TAPPI JOURNAL, June 1997, Vol. 80(6)
High-barrier packaging with liquid crystal polymers, TAPPI JOURNAL, June 1997, Vol. 80(6)
Journal articles
High-performance hot melts for bonding polar and nonpolar substrates, TAPPI JOURNAL, June 1997, Vol. 80(6)
High-performance hot melts for bonding polar and nonpolar substrates, TAPPI JOURNAL, June 1997, Vol. 80(6)
Journal articles
The effect of layer geometry on the layer adhesion of coextruded films, TAPPI JOURNAL, May 1997, Vol. 80(5)
The effect of layer geometry on the layer adhesion of coextruded films, TAPPI JOURNAL, May 1997, Vol. 80(5)
Journal articles
Formulating deep freeze hmas - a statistical approach to predict performance properties, TAPPI JOURNAL, September 1997, Vol. 80(9)
Formulating deep freeze hmas - a statistical approach to predict performance properties, TAPPI JOURNAL, September 1997, Vol. 80(9)
Journal articles
Silicon-based antioxidants for hot melt adhesives, TAPPI JOURNAL, October 1998, Vol.81(10)
Silicon-based antioxidants for hot melt adhesives, TAPPI JOURNAL, October 1998, Vol.81(10)
Journal articles
Single-Site Catalyst Produced Polyolefin Plastomers for Extrusion Coating and Laminating, TAPPI JOURNAL, January 1999, Vol. 83(5)
Single-Site Catalyst Produced Polyolefin Plastomers for Extrusion Coating and Laminating, TAPPI JOURNAL, January 1999, Vol. 83(5)
Journal articles
The control of product and package quality with the electronic nose, TAPPI JOURNAL, June 1999, Vol. 82(6)
The control of product and package quality with the electronic nose, TAPPI JOURNAL, June 1999, Vol. 82(6)
Journal articles
Deposition of hot melt and wax on surfaces, TAPPI JOURNAL, November 1999, Vol. 82(11)
Deposition of hot melt and wax on surfaces, TAPPI JOURNAL, November 1999, Vol. 82(11)
Journal articles
Local delamination in pharmaceutical blister packages • A thermomechanical theory on buckling of heat-sealed composite laminates in flexible packaging, TAPPI Journal July 2025
ABSTRACT: Pharmaceutical blister packages consist of cavities made from a thick polymeric form foil and a thin aluminum lid foil. Heat-sealing technology is usually used to bond the lid foil to the form foil. Occasionally, the sealed area shows buckling defects of the lid foil, which allow contamination to enter into the cavity. A contaminated product is a worst-case scenario for pharmaceutical production and must be avoided. We discuss a thermomechanical theory on buckling defects in blister packages and derive strategies to avoid these. The theory is based on the assumption that the seal of a blister packaging behaves like a laminate of thin composite layers under compressive load. Literature research on buckling of thin laminated films, thermal behavior of polymers, and seal strength of heat-sealed polymers provides the technical and physical background to elaborate the theory. The theory comprises three elements: an initial condition regarding thermal load and precedent defects; a buckling condition; and a crack propagation condition. The plausibility of the theory is verified using model calculations and heat-seal tests. The paper concludes with strategies against buckling of heat-sealed lid foils and an outlook on other applications in laminating and coating of polymer films.