Polymer melt rheology and flow simulations applied to cast film extrusion die design: An industrial perspective

Catherine, O.

doi:10.1063/1.4982988

Cited by 3 publications

(3 citation statements)

References 10 publications

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“…Consequently, there is a need to test and develop the small-scale die extrusion system considering its practical benefits in tackling the plastic waste problem. Areas of focus include the mass flow rate; melt uniformity and distribution of the flow of the polymer extrudate from the barrel through the die; temperature changes and cooling during and after the discharge; and the balancing and insulation of the die channel [161].…”

Section: Moulding Machinery Selectionmentioning

confidence: 99%

Small-Scale Mechanical Recycling of Solid Plastic Wastes: A Review of PET, PEs, and PP

Uzosike¹,

Yee²,

Padilla³

2022

Preprint

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Mechanical recycling of solid plastic wastes on a small-scale level can be accomplished with the correct approaches. Thermoplastics are mostly considered for mechanical recycling because of their physical properties and ease of reprocessing. This paper reviews the mechanical reprocessing techniques of selected thermoplastics (polyethylene terephthalate and polyolefins) since they constitute a significant proportion of plastics used commercially. Furthermore, necessary considerations for effective operation of small-scale plants, including energy requirements of machinery and optimisation in order to improve efficiency and product quality, are discussed. A clearer understanding and addressing of the process-related challenges will lead to successful establishment and management of small-scale mechanical recycling facilities to benefit communities. Efficient small-scale mechanical reprocessing establishments have become essential in reducing the environmental impacts of solid plastic wastes and for energy conservation.

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Section: Moulding Machinery Selectionmentioning

confidence: 99%

Small-Scale Mechanical Recycling of Solid Plastic Wastes: A Review of PET, PEs, and PP

Uzosike¹,

Yee²,

Padilla³

2022

Preprint

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“…In these equations, shear rate and shear stress are substituted by the Carreau-Yasuda viscosity in Equation (8) as mentioned in the study by Kim [17]. Integrations of Equations ( 10) and (11) are solved numerically by the trapezoidal method. Temperature profile is calculated by solving the following energy equation:…”

Section: Inflow Boundary Conditionmentioning

confidence: 99%

“…They also reported that the power-law index significantly affects the flow distribution. Catherine [11] studied the flow and temperature fields of polymer melt in the extrusion die cavity and analyzed rheology, temperature dependency, and residence time distribution.…”

Section: Introductionmentioning

confidence: 99%

Optimization of Polymer Extrusion Die Based on Response Surface Method

et al. 2020

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A coupled surface response optimization method with a three-dimensional finite volume method is adopted in this study to identify five independent geometric variables of the die interior that provides a design with the lowest velocity variance at the exit of the coat-hanger extrusion die. Two of these five geometric variables represent the manifold dimension while the other three variables represent the die profile. In this method, B-spline fitting with four points was used to represent the die profile. A comparison of the optimized die obtained in our study and the die with a geometry derived by a previous theoretical work shows a 20.07% improvement in the velocity distribution at the exit of the die.

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Small-Scale Mechanical Recycling of Solid Thermoplastic Wastes: A Review of PET, PEs, and PP

2023

View full text Add to dashboard Cite

The mechanical recycling of solid plastic waste on a small-scale level can be accomplished with the correct approaches. Thermoplastics are the types of plastic mostly considered for mechanical recycling because of their physical properties and ease of reprocessing. This paper reviews the mechanical reprocessing techniques of selected thermoplastics (polyethylene terephthalate and polyolefins), since they constitute a significant proportion of the plastics used commercially. Furthermore, necessary considerations for the effective operation of small-scale plants, including energy requirements of machinery and optimisation in order to improve efficiency and product quality, are discussed. A clearer understanding and addressing of the process-related challenges will lead to the successful establishment and management of small-scale mechanical recycling facilities to benefit communities. Efficient small-scale mechanical reprocessing establishments have become essential in reducing the environmental impacts of solid plastic waste and for energy conservation.

show abstract

Polymer melt rheology and flow simulations applied to cast film extrusion die design: An industrial perspective

Cited by 3 publications

References 10 publications

Small-Scale Mechanical Recycling of Solid Plastic Wastes: A Review of PET, PEs, and PP

Small-Scale Mechanical Recycling of Solid Plastic Wastes: A Review of PET, PEs, and PP

Optimization of Polymer Extrusion Die Based on Response Surface Method

Small-Scale Mechanical Recycling of Solid Thermoplastic Wastes: A Review of PET, PEs, and PP

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