Bissacco, Giuliano

Saxena, Prateek

Due to ever-increasing demand of sustainable products, eco-friendly packaging solutions are findingtheir importance in the paper packaging industry [1]. Green Fiber Bottle (GFB) is an alternative toplastic, glass and metal based packaging for beverages. The manufacturing of paper bottle is a two-stageprocess, where the wood fibers are first thermoformed in the desired shape followed by drying of theformed geometry [2]. To ensure the robustness of the bottle and to avoid shrinkage of cellulose fibers,the wet-formed bottle is pressurized using a silicone core. The core is inserted inside the drying tooland inflated. This keeps the wet bottle under pressure thereby enhancing formation of good hydrogenbonds, and hence providing good strength. The feasibility of the tool design concept is supported withFinite Element Model. The hyperelastic behaviour of silicone is defined by the deformation energyfunction (W). To simulate the inflation action of the core, Yeoh’s model is used for modelling of W. Thestrength of the GFB is correlated with the pressure the bottle can hold and the cut off burst pressurefrom experiments is also reported in this work

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                       General rights Copyright and moral rights for the publications made accessible in the public portal are retained by the authors and/or other copyright owners and it is a condition of accessing publications that users recognise and abide by the legal requirements associated with these rights.  • Users may download and print one copy of any publication from the public portal for the purpose of private study or research. • You may not further distribute the material or use it for any profit-making activity or commercial gain • You may freely distribute the URL identifying the publication in the public portal   If you believe that this document breaches copyright please contact us providing details, and we will remove access to the work immediately and investigate your claim.     Downloaded from orbit.dtu.dk on: Nov 09, 2017Application  of silicone based elastomers for manufacturing  of Green Fiber BottleSaxena, Prateek; Bissacco, GiulianoPublished in:Book of AbstractsPublication date:2017Document VersionPeer reviewed versionLink back to DTU OrbitCitation (APA):Saxena, P., & Bissacco, G. (2017). Application  of silicone based elastomers for manufacturing  of Green FiberBottle. In Book of Abstracts (pp. 62). [P17] Department of Chemical and Biochemical Engineering.P17: Application of silicone based elastomers for manufacturing of GreenFiber BottlePrateek Saxena; Giuliano BissaccoDepartment of Mechanical Engineering, Technical University of DenmarkDue to ever-increasing demand of sustainable products, eco-friendly packaging solutions are findingtheir importance in the paper packaging industry [1]. Green Fiber Bottle (GFB) is an alternative toplastic, glass and metal based packaging for beverages. The manufacturing of paper bottle is a two-stageprocess, where the wood fibers are first thermoformed in the desired shape followed by drying of theformed geometry [2]. To ensure the robustness of the bottle and to avoid shrinkage of cellulose fibers,the wet-formed bottle is pressurized using a silicone core. The core is inserted inside the drying tooland inflated. This keeps the wet bottle under pressure thereby enhancing formation of good hydrogenbonds, and hence providing good strength. The feasibility of the tool design concept is supported withFinite Element Model. The hyperelastic behaviour of silicone is defined by the deformation energyfunction (W). To simulate the inflation action of the core, Yeoh’s model is used for modelling of W. Thestrength of the GFB is correlated with the pressure the bottle can hold and the cut off burst pressurefrom experiments is also reported in this work.References1. Didone, M., Saxena, P., Meijer, E. B., Tosello, G., Bissacco, G., McAloone, T. C., Howard, T.J. Moulded Pulp Manufacturing: Overview and Prospects for the Process Technology. PackagingTechnology and Science. 2017, DOI: 10.1002/pts.22892. Søllner, K., A system and a method for producing a molded article, such as a bottle, 2016,WO2016/055073 A1Click here to return to program63

Application of silicone based elastomers for manufacturing of Green Fiber Bottle

Due to ever-increasing demand of sustainable products, eco-friendly packaging solutions are finding their importance in the paper packaging industry. Green Fiber Bottle (GFB) is an alternative to plastic, glass and metal based packaging for beverages. The tool concept for manufacturing of paper bottle uses a silicone based elastomer as the core. The expansion of core in the tool resists shrinkage of paper during drying as well as helps in obtaining good fiber compaction. The feasibility of the tool concept in the production of GFB is discussed in this work

                       General rights Copyright and moral rights for the publications made accessible in the public portal are retained by the authors and/or other copyright owners and it is a condition of accessing publications that users recognise and abide by the legal requirements associated with these rights.  • Users may download and print one copy of any publication from the public portal for the purpose of private study or research. • You may not further distribute the material or use it for any profit-making activity or commercial gain • You may freely distribute the URL identifying the publication in the public portal   If you believe that this document breaches copyright please contact us providing details, and we will remove access to the work immediately and investigate your claim.     Downloaded from orbit.dtu.dk on: Nov 09, 2017Application of silicone based elastomers for manufacturing  of Green Fiber BottleSaxena, Prateek; Bissacco, GiulianoPublication date:2017Document VersionPublisher's PDF, also known as Version of recordLink back to DTU OrbitCitation (APA):Saxena, P., & Bissacco, G. (2017). Application of silicone based elastomers for manufacturing  of Green FiberBottle. Poster session presented at 11th International Workshop on Silicone Polymers 2017 (ISPO 2017),Snekkersten, Denmark.Application of silicone based elastomers for manufacturing of Green FiberBottlePrateek Saxena and Giuliano Bissaccoprasax@mek.dtu.dk, gibi@mek.dtu.dk The FEM analysis predicts generation of uneven contact pressure on tool from the silicone core. The contact pressure is relatively lessin the area of sharp curvature as compared to rest of the bottle geometry. The uneven contact pressure gives rise to uneven wallthickness. Wall thickness analysis using Industrial X-ray CT verifies the occurrence of ‘weak zones’ in the bottle. The average cut-offpressure that a bottle made of recycled newsprint pulp can withstand is 5 bar. The strength of GFB can be enhanced by optimizingthe shape of silicone core, thereby offering uniform wall thickness. Moreover, a stronger pulp material is desirable and is beinginvestigated for the production of GFB.5. Conclusions and Future work(a)The work has been carried out as a part of the project titled “Impulse Drying of cardboard moulded 3D structures” withthe support from Innovations Fund Denmark (Grant no. 5106-00006B). The authors would also like to acknowledge thehelp and support from EcoXpac and Carlsberg group for carrying out this work.6. AcknowledgementDepartment of Mechanical Engineering, Technical University of Denmark,Kgs. Lyngby, DK-2800, DenmarkDue to ever-increasing demand of sustainable products, eco-friendly packaging solutions are finding their importance inthe paper packaging industry. Green Fiber Bottle (GFB) is an alternative to plastic, glass and metal based packaging forbeverages. The tool concept for manufacturing of paper bottle uses a silicone based elastomer as the core. Theexpansion of core in the tool resists shrinkage of paper during drying as well as helps in obtaining good fiber compaction.The feasibility of the tool concept in the production of GFB is discussed in this work.1. Introduction2. Manufacturing Process3. Fiber compaction4. Feasibility of the tool conceptThe hyperelastic behaviour of the silicone core is defined byDeformation energy function (W). To simulate the inflating action of thecore, Yeoh’s model is used for modelling W.Governing equations F = Deformation gradient tensor𝐅𝐅 = 𝛛𝛛𝛛𝛛𝛛𝛛𝛛𝛛; 𝛔𝛔 = 𝟐𝟐𝐅𝐅 𝛛𝛛𝛛𝛛𝛛𝛛𝛛𝛛𝐅𝐅𝐓𝐓 C = Cauchy – Green tensorx and X = Spatial and material coordinates𝑾𝑾 = 𝑪𝑪𝟏𝟏𝟏𝟏 𝑰𝑰𝟏𝟏 − 𝟑𝟑 + 𝑪𝑪𝟐𝟐𝟏𝟏 𝑰𝑰𝟏𝟏 − 𝟑𝟑 + 𝑪𝑪𝟑𝟑𝟏𝟏(𝑰𝑰𝟏𝟏 − 𝟑𝟑)Where I = trace of C; 𝑪𝑪𝟏𝟏𝟏𝟏, 𝑪𝑪𝟐𝟐𝟏𝟏, 𝑪𝑪𝟑𝟑𝟏𝟏 to be determined by curve fitting.Bursting of bottle in the non-conformalareas was verified. This is due to non-uniform contact pressure in the toolleading to uneven fiber compaction.Wall thickness analysis using Computed Tomography (CT) verified uneven fiber compaction in the GFB.Fig. 1 (a) The forming process Fig. 1 (b) The drying processFig. 2  Manufacturing of silicone core (on left) and a finished GFB (on right)Fig. 3 Wall thickness analysis of GFB (on left) and CT scanned specimen (on right)Fig. 4 Finite Element Model (FEM) based analysis of contact pressure (on left) and FEM model (on right)Fig. 5 Bursting of GFB (on left) and a prototype of GFB (on right)

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Application of silicone based elastomers for manufacturing of Green Fiber Bottle

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