The Effect of High Pressure Processing on the Integrity of Polymeric Packaging – Analysis and Categorization of Occurring Defects

Fleckenstein, Benedikt Stefan; Sterr, Julia; Langowski, Horst‐Christian

doi:10.1002/pts.2018

Cited by 21 publications

(14 citation statements)

References 150 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The significant increase in film thickness at the white spots confirmed the changes in the topography and morphology of the films, as stated previously. The changes included cracks, voids, and wrinkles were also reported elsewhere . In addition, bubbles with a diameter of up to 5 mm formed in film B.…”

Section: Resultssupporting

confidence: 67%

See 1 more Smart Citation

Role of package headspace on multilayer films subjected to high hydrostatic pressure

et al. 2019

View full text Add to dashboard Cite

The objective of this study was to systematically examine the effect of high‐pressure processing and package headspace on package integrity and properties. Working pressures were 400 and 600 MPa, and starting vessel temperatures were 30°C, 60°C, and 90°C. Coextruded and laminated multilayers packaging films were studied: film A: (PA/EVOH/PP) and film B: (PET‐AlOx‐OC/PA6/PP), respectively. The films were made into pouches (0.05 m × 0.10 m) and filled with 30‐mL water as a model food. Various headspace volumes (0, 0.05, 0.10, 0.15, 0.20, 0.25, and 0.30‐cc air/mL H2O) were introduced into the packaging before processing. Imaging was used to quantify defects such as the formation of white spots on the package surface and delamination of film layers. The results showed that the headspace level and processing initial temperature had a greater effect than the operating pressure on visual defects. The package with 0% headspace did not show any physical damage to the tested films. Furthermore, thermal and mechanical analyses showed that the coextruded film A had better resistance to testing conditions than the laminated structure of film B. The X‐ray diffraction results showed that film B had more defects than film A that altered the crystalline structure. Visual observation revealed white spots and delamination in the inside layer (PP) in both films. The same processing conditions affected the oxygen and water vapour transmission rates of film B more than film A. This work provides a basic guideline to select the right headspace for a given type of packaged food whenever heat and pressure are used simultaneously.

show abstract

Section: Resultssupporting

confidence: 67%

“…The changes included cracks, voids, and wrinkles were also reported elsewhere. 36 In addition, bubbles with a diameter of up to 5 mm formed in film B. Other researchers have also reported bubble formation in PET-based multilayer films after high-pressure and high-temperature processing.…”

Section: White Spots and Delaminationmentioning

confidence: 89%

Role of package headspace on multilayer films subjected to high hydrostatic pressure

et al. 2019

View full text Add to dashboard Cite

show abstract

“…6,7 The amount of adiabatic heating depends on the specific foodstuff composition and on the type of packaging material and of pressure-transmitting fluid. 7 For the case of interest in the present contribution (where the focus is on water based foodstuff, water compression fluid and flexible polymeric packaging), temperature increase rate under compression ranges, for all these components, between about 3°C and 5°C/100 MPa. 6 An important issue related to selection of packaging materials intended for HPP treatments concerns possible occurrence of failure and changes in the polymeric packaging structure and barrier properties.…”

Section: Introductionmentioning

confidence: 99%

Effects of High Pressure Treatments on Polymeric Films for Flexible Food Packaging

Sansone

Aldi

Musto

et al. 2014

Packag. Technol. Sci.

View full text Add to dashboard Cite

Effects of high pressure (HP) treatments on functional and morphological properties of commercial packaging films have been investigated, to assess their suitability for use in these processes. Experimental analyses have been performed on packaging films, used to make pouches containing four different types of food simulants, after HP pasteurization and sterilization treatments at 200, 500 and 700 MPa. The investigated polymeric flexible packaging structures were single layer as well as bilayer films. Effects of treatments on structural/morphological properties (i.e. crystallinity and density) and on thermodynamic and barrier properties were addressed. Quite all the investigated films were found to be suitable for HP pasteurization, which only determined a negligible effect on the glass transition temperatures and on density of the amorphous regions of some polymeric materials, without a significant effect on functional properties of the packaging. Only bilayer structures including metalized polyethyleneterephthalate were not able to withstand processing conditions because of an extensive delamination accompanied by loss of metallization layer. Conversely, in the case of HP sterilization, combined effects of HP and relatively high temperature caused significant modifications in some of the packaging materials, even those not including a metalized film. In particular, localized delamination occurred in the case of bilayer structures made by laminating polyethyleneterephtalate with linear low density polyethylene or with polypropylene. Films obtained by laminating cast polyamide and bioriented polyamide with polypropylene displayed no evidence of delamination. In the case of films not displaying delamination, only limited changes in gas and vapour barrier properties were detected

show abstract

“…The question whether high pressure treatment directly affects the crystallinity of polymers cannot be answered unambiguously, as we have presented in . Thus we performed DSC measurements to ascertain the influence of the two treatments on the thermal properties of the used laminates.…”

Section: Resultsmentioning

confidence: 99%

“…The effects of high pressure treatment of packed food on the ‘must‐haves’ of their properties like visual integrity, gas and water vapour barrier and seal strength have been investigated in depth, see the reviews . Also the influence of new combinations such as high pressure, modified atmosphere and packaging design was investigated recently .…”

Section: Introductionmentioning

confidence: 99%

The Influence of High Pressure Treatment and Thermal Pasteurization on the Surface of Polymeric Packaging Films

Fleckenstein

Sterr

Langowski

2016

Packag. Technol. Sci.

Self Cite

View full text Add to dashboard Cite

Several common single layer films (PE-HD, PE-LD, PP-BO, PA6-BO and PET-BO) and multilayer (PS/PE, PP-BO/PEpeel and PET-BO/PE) films were treated by either high pressure (600 MPa) or temperature (80°C/90°C) to simulate a high pressure or thermal pasteurization process. The samples were tested by atomic force microscopy (AFM), profile method and surface energy measurements to obtain information about the influence of the treatments on the surface topography and surface energy of the samples and by differential scanning calorimetry and by tensile testing concerning material properties. As key figures arithmetic surface roughness (by AFM at Pulsed Force Mode and profile method), surface energy by surface energy measurement and adhesion between tip and surface by AFM were extracted. Results indicate an influence of both high-pressure processing and thermal-processing on the surface roughness of biaxial oriented polymer films as single layer films. Laminated biaxially oriented polymer films showed no changes regardless of which processing was performed. The surface energy was hardly affected by both of the treatments for any stretched, non-stretched, single or laminated films.

show abstract

The Effect of High Pressure Processing on the Integrity of Polymeric Packaging – Analysis and Categorization of Occurring Defects

Cited by 21 publications

References 150 publications

Role of package headspace on multilayer films subjected to high hydrostatic pressure

Role of package headspace on multilayer films subjected to high hydrostatic pressure

Effects of High Pressure Treatments on Polymeric Films for Flexible Food Packaging

The Influence of High Pressure Treatment and Thermal Pasteurization on the Surface of Polymeric Packaging Films

Contact Info

Product

Resources

About