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Magazine articles
Open Access
Hot melt symposium presentations seek ideal product, TAPPI JOURNAL, December 1997, Vol. 80(12)

Hot melt symposium presentations seek ideal product, TAPPI JOURNAL, December 1997, Vol. 80(12)

Journal articles
Open Access
Flexible nonwoven composites for food packaging, TAPPI JOURNAL, May 1991, Vol. 74(5)

Flexible nonwoven composites for food packaging, TAPPI JOURNAL, May 1991, Vol. 74(5)

Journal articles
Open Access
Techniques for package printing and design, September 1988, TAPPI Journal 88SEP137

Techniques for package printing and design, TAPPI JOURNAL September 1988

Journal articles
Open Access
Using dynamic mechanical spectroscopy to improve the performance of hot melt adhesives, TAPPI JOURNAL March 1989

Using dynamic mechanical spectroscopy to improve the performance of hot melt adhesives, TAPPI JOURNAL March 1989

Journal articles
Open Access
Using the solubility parameter to design polyvinylidene chloride copolymers for improved hot tack performance in coatings, TAPPI JOURNAL, April 1990, Vol. 73(4)

Using the solubility parameter to design polyvinylidene chloride copolymers for improved hot tack performance in coatings, TAPPI JOURNAL, April 1990, Vol. 73(4)

Conference papers
Subscription Access
Adhesives for sanitary napkins, TAPPI JOURNAL, August 1990, Vol. 73(8)

Adhesives for sanitary napkins, TAPPI JOURNAL, August 1990, Vol. 73(8)

Journal articles
Open Access
Polymers, laminations and coatings conference, TAPPI JOURNAL, January 1990, Vol. 73(1)

Polymers, laminations and coatings conference, TAPPI JOURNAL, January 1990, Vol. 73(1)

Journal articles
Open Access
New modified hydrocarbon resins: an alternative to styrenated terpene resins in hot melts, TAPPI JOURNAL, June 1990, Vol. 73(6)

New modified hydrocarbon resins: an alternative to styrenated terpene resins in hot melts, TAPPI JOURNAL, June 1990, Vol. 73(6)

Journal articles
Open Access
Understanding coating strength at the molecular and microscopic level, TAPPI JOURNAL June 2015

Understanding coating strength at the molecular and microscopic level, TAPPI JOURNAL June 2015

Journal articles
Open Access
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.

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