Search
Use the search bar or filters below to find any TAPPI product or publication.
Filters
Content Type
Publications
Level of Knowledge
Committees
Collections
Journal articles
Makroplan method â?? a powerful tool for surface evaluation, "the PLACE", December 2002
Makroplan method – a powerful tool for surface evaluation, "the PLACE", December 2002
Journal articles
The case against oxidation as a primary factor for bonding a
The case against oxidation as a primary factor for bonding acid copolymers to foil, "the PLACE", December 2000
Journal articles
Creative problem solving, "the PLACE", December 2000
Creative problem solving, "the PLACE", December 2000
Journal articles
A basic understanding of chill rolls, "the PLACE", October 2000
A basic understanding of chill rolls, "the PLACE", October 2000
Journal articles
Polylactide, a new thermoplastic for extrusion coating, "the PLACE", June 2001
Polylactide, a new thermoplastic for extrusion coating, "the PLACE", June 2001
Journal articles
Permeation processes in barriers and membranes: complementary differences, "the PLACE", February 2003 (336KB)
Permeation processes in barriers and membranes: complementary differences, "the PLACE", February 2003 (336KB)
Journal articles
Form vs. substance in hot melt adhesives, "the PLACE", November 2002 (127KB)
Form vs. substance in hot melt adhesives, "the PLACE", November 2002 (127KB)
Journal articles
Characterization and converting of dispersion and extrusion coated hd-papers, "the PLACE", May 2003 (710KB)
Characterization and converting of dispersion and extrusion coated hd-papers, "the PLACE", May 2003 (710KB)
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.
Journal articles
Use of liquid mdi products for polyurethane reactive hot-melt resins, TAPPI JOURNAL, November 1996, Vol. 79(11)
Use of liquid mdi products for polyurethane reactive hot-melt resins, TAPPI JOURNAL, November 1996, Vol. 79(11)