Numerical modeling of multilayer film coextrusion with experimental validation

Champion, James; Looney, M. Kieran; Simmons, Mark

doi:10.1002/pen.24022

Cited by 5 publications

(4 citation statements)

References 48 publications

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“…To fulfill the strict requirements for food packaging applications, multilayer film (MLF) packaging is a suitable technique where layering individual films fabricates films into a single die through a coextrusion process, where each layer must remain distinct but well bonded. 15,16 Each layer has a definite function during the layout. MLF integrates the unique characteristics of participating polymers to create a film with improved performance in terms of sealing, protection, and durability.…”

Section: Introductionmentioning

confidence: 99%

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Coextruded polylactide/encapsulated cinnamon essential oil/graphene nanoplatelets trilayer films: Morphological, barrier, thermal, rheological and antimicrobial properties

Ahmed,

Bher,

Jacob

et al. 2024

Polymer Engineering & Sci

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Polylactide (PLA)‐based biodegradable three‐layer packaging film was fabricated using PLA, PLA/cinnamon oil (CEO), and PLA/graphene nanoplatelets (GNP). The central layer allows control over the release of antimicrobes, and the outer layer adds mechanical strength to the films. A comparison has been made on barrier, thermal, rheological, microstructural, and microbiological properties between single‐layer and multilayer films (MLF). The water vapor and oxygen barrier properties of MLF showed little reduction compared with those of neat PLA. The tensile stress of the neat PLA increased significantly from 23.31 to 35.91 MPa for the MLF. Thermal analysis data showed improvements in the thermal stability of the MLF film, with onset and peak temperatures of 331.5 and 357.1°C, respectively. The dispersion of GNP in the PLA matrix and in MLF was assessed by XRD analysis and rheological measurement. The AFM roughness parameters Sa and Sq of those films varied widely, with the highest (13.9 and 20.9 μm) and the lowest (0.08 and 0.11 μm) magnitudes recorded for PLA/GNP and PLA/CEO films, respectively. Antibacterial assays of the film confirmed a strong bactericidal effect against Listeria monocytogenes and Salmonella typhimurium, maintaining this activity for 21 days.Highlights Polylactide/cinnamon oil/ graphene nanoplatelet multilayer films were coextruded. X‐ray diffraction and rheology confirm the dispersion of graphene into PLA. Tensile stress and thermal stability improved in the multilayer films. AFM roughness parameters varied significantly between single‐ and multilayer films. Antibacterial assays confirmed the strong bactericidal effect of films against pathogens.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Coextruded polylactide/encapsulated cinnamon essential oil/graphene nanoplatelets trilayer films: Morphological, barrier, thermal, rheological and antimicrobial properties

Ahmed,

Bher,

Jacob

et al. 2024

Polymer Engineering & Sci

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“…In conventional multilayer coextrusion, interfacial instability is crucial for the quality of the multilayer films. [4][5][6][7][8][9][10][11] M.T. Martyn reported the experimental studies and numerical modeling of the interfacial instability in the bi-layer coextrusion flow of two low-density polyethylene.…”

Section: Introductionmentioning

confidence: 99%

Study of the interfacial adhesive strength of a heat‐shrinkable multilayer film

Nishitsuji

Shinozaki

Miyata

et al. 2021

Polymer Engineering & Sci

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A heat‐shrinkable multilayer film is widely employed as labels of plastic bottles. A new heat‐shrinkable multilayer film without an adhesive layer was designed in this study. The interfacial adhesive strength between the layers was controlled to avoid layer separation. We assumed a polyethylene terephthalate glycol‐modified (PETG)/styrene‐co‐butadiene block copolymer/PETG shrinkable film substitute as the general poly(ethylene terephthalate) (PET)/polystyrene/PET shrinkable film. The interlayer adhesive strength between the layers was retained for industrial utilization even after drawing. Additional polybutadiene (PB) infiltrated the butadiene layer in the microphase‐separated structure. Further addition of PB could not infiltrate the butadiene layer. The excessive PB contents coexisted with the interface between the layers, as observed by transmission electron microscopy (TEM). The segregated PB enhanced the interfacial adhesive strength. We concluded that the selective distribution of adhesive functional materials along the interface could appropriately retain its adhesive strength.

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“…Addressing interfacial instability is critical for multilayer film quality in conventional multilayer coextrusion. [4][5][6][7][8][9][10][11][12][13][14][15] Fundamentally, when molten polymer layers are laminated, adhesion challenges may occur due to differences in the material and flow properties. [16][17][18] M.T.…”

mentioning

confidence: 99%

Effect of temperature and pressure on the interfacial morphology and bond strength of thermally laminated glycol-modified polyethylene terephthalate/styrene-co-butadiene block copolymer films and comparison with coextruded (polyethylene terephthalate/styrene-co-butadiene block copolymer/polyethylene terephthalate) and polyethylene terephthalate/styrene-co-butadiene block copolymer/polyethylene terephthalate films heated with applied pressure after extrusion

Ishida

Nishitsuji

Miyata

2022

Journal of Plastic Film & Sheeting

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This study focuses on controlling the interfacial adhesive strength between heat-sealed styrene-co-butadiene block copolymer (SBC) and glycol-modified polyethylene terephthalate (PETG) multilayer films. In comparison, the interfacial bond strength of coextruded PETG/SBC/PETG films was weaker. The lamella structures of SBC and free polybutadiene increased the interfacial adhesive strength. The coextruded films with applied thermal pressing were also examined. When exposed to heat, the interfacial adhesive strength improved. The butadiene layer segregated along the adhesive interface, as observed by transmission electron microscopy. The butadiene layer improved the interfacial adhesive strength. The applied pressure caused the butadiene layer to segregate in a parallel manner along the adhesive interface. The developed lamellar structure did not increase adhesive strength. We considered that the adhesive strength decreased due to a thinner butadiene layer with higher pressure. We concluded that adhesive segregation along the adhesive interface improved the bond strength.

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Numerical modeling of multilayer film coextrusion with experimental validation

Cited by 5 publications

References 48 publications

Coextruded polylactide/encapsulated cinnamon essential oil/graphene nanoplatelets trilayer films: Morphological, barrier, thermal, rheological and antimicrobial properties

Coextruded polylactide/encapsulated cinnamon essential oil/graphene nanoplatelets trilayer films: Morphological, barrier, thermal, rheological and antimicrobial properties

Study of the interfacial adhesive strength of a heat‐shrinkable multilayer film

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