Reversible Joining Technology for Polyolefins Using Electromagnetic Energy and Homologous Hot-Melt Adhesives Containing Metallic and Ferrite Additives.
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| Title: | Reversible Joining Technology for Polyolefins Using Electromagnetic Energy and Homologous Hot-Melt Adhesives Containing Metallic and Ferrite Additives. |
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| Authors: | Ciobanu, Romeo Cristian1 (AUTHOR) mosneagum@yahoo.com, Aradoaei, Mihaela1,2 (AUTHOR), Ursan, George Andrei1 (AUTHOR), Caramitu, Alina Ruxandra2 (AUTHOR) virgil.marinescu@icpe-ca.ro, Marinescu, Virgil2 (AUTHOR), Eva, Rolland Luigi1 (AUTHOR) |
| Source: | Polymers (20734360). Jan2026, Vol. 18 Issue 2, p228. 24p. |
| Subjects: | Polyolefins, Hot melt adhesives, Tensile strength, Electromagnetic waves, Sealing (Technology), Metallic oxides, Metal powders |
| Abstract: | This research examined the development and testing of hot-melt adhesives incorporating metallic (Al and Fe powders averaging 800 nm) and ferrite additives, designed for reversible bonding technology of polyolefins through electromagnetic energy. The experimental models with Al displayed smooth particles that were fairly evenly distributed within the polymer matrix. Experimental models with Fe suggested that Fe nanopowders are more difficult to disperse within the polymer matrix, frequently resulting in agglomeration. For ferrite powder, there were fewer agglomerations noticed, and the dispersion was more uniform compared to similar composites containing Fe particles. Regarding water absorption, the extent of swelling was greater in the composites that included Al. Because of toluene's affinity for the matrices, the swelling measurements stayed elevated even with reduced exposure times, and the composites with ferrite showed the lowest swelling compared to those with metallic particles. A remarkable evolution of the dielectric loss factor peak shifting towards higher frequencies with rising temperatures was observed, which is particularly important when the materials are exposed to thermal activation through electromagnetic energy. The reversible bonding experiments were performed on polyolefin samples which were connected longitudinally by overlapping at the ends; specialized hot-melts were employed, using electromagnetic energy at 2.45 GHz, with power levels between 140 and 850 × 103 W/kg and an exposure duration of up to 2 min. The feasibility of bonding polyolefins using homologous hot-melts that include metallic/ferrite elements was verified. Composites with both matrices showed that the hot-melts with Al displayed the highest mechanical tensile strength values, but also had a relatively greater elongation. All created hot-melts were suitable for reversible adhesion of similar polyolefins, with the one based on HDPE and Fe considered the most efficient for bonding HDPE, and the one based on PP and Al for PP bonding. When bonding dissimilar polyolefins, it seems that the technique is only effective with hot-melts that include Al. According to the reversible bonding diagrams for specific substrates and hot-melt combinations, and considering the optimization of energy consumption in relation to productivity, the most cost-effective way is to utilize 850 × 103 W/kg power with a maximum exposure time of 1 min. [ABSTRACT FROM AUTHOR] |
| Copyright of Polymers (20734360) is the property of MDPI and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Engineering Source |
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| Header | DbId: egs DbLabel: Engineering Source An: 191214635 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Reversible Joining Technology for Polyolefins Using Electromagnetic Energy and Homologous Hot-Melt Adhesives Containing Metallic and Ferrite Additives. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Ciobanu%2C+Romeo+Cristian%22">Ciobanu, Romeo Cristian</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> mosneagum@yahoo.com</i><br /><searchLink fieldCode="AR" term="%22Aradoaei%2C+Mihaela%22">Aradoaei, Mihaela</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Ursan%2C+George+Andrei%22">Ursan, George Andrei</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Caramitu%2C+Alina+Ruxandra%22">Caramitu, Alina Ruxandra</searchLink><relatesTo>2</relatesTo> (AUTHOR)<i> virgil.marinescu@icpe-ca.ro</i><br /><searchLink fieldCode="AR" term="%22Marinescu%2C+Virgil%22">Marinescu, Virgil</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Eva%2C+Rolland+Luigi%22">Eva, Rolland Luigi</searchLink><relatesTo>1</relatesTo> (AUTHOR) – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Polymers+%2820734360%29%22">Polymers (20734360)</searchLink>. Jan2026, Vol. 18 Issue 2, p228. 24p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Polyolefins%22">Polyolefins</searchLink><br /><searchLink fieldCode="DE" term="%22Hot+melt+adhesives%22">Hot melt adhesives</searchLink><br /><searchLink fieldCode="DE" term="%22Tensile+strength%22">Tensile strength</searchLink><br /><searchLink fieldCode="DE" term="%22Electromagnetic+waves%22">Electromagnetic waves</searchLink><br /><searchLink fieldCode="DE" term="%22Sealing+%28Technology%29%22">Sealing (Technology)</searchLink><br /><searchLink fieldCode="DE" term="%22Metallic+oxides%22">Metallic oxides</searchLink><br /><searchLink fieldCode="DE" term="%22Metal+powders%22">Metal powders</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: This research examined the development and testing of hot-melt adhesives incorporating metallic (Al and Fe powders averaging 800 nm) and ferrite additives, designed for reversible bonding technology of polyolefins through electromagnetic energy. The experimental models with Al displayed smooth particles that were fairly evenly distributed within the polymer matrix. Experimental models with Fe suggested that Fe nanopowders are more difficult to disperse within the polymer matrix, frequently resulting in agglomeration. For ferrite powder, there were fewer agglomerations noticed, and the dispersion was more uniform compared to similar composites containing Fe particles. Regarding water absorption, the extent of swelling was greater in the composites that included Al. Because of toluene's affinity for the matrices, the swelling measurements stayed elevated even with reduced exposure times, and the composites with ferrite showed the lowest swelling compared to those with metallic particles. A remarkable evolution of the dielectric loss factor peak shifting towards higher frequencies with rising temperatures was observed, which is particularly important when the materials are exposed to thermal activation through electromagnetic energy. The reversible bonding experiments were performed on polyolefin samples which were connected longitudinally by overlapping at the ends; specialized hot-melts were employed, using electromagnetic energy at 2.45 GHz, with power levels between 140 and 850 × 103 W/kg and an exposure duration of up to 2 min. The feasibility of bonding polyolefins using homologous hot-melts that include metallic/ferrite elements was verified. Composites with both matrices showed that the hot-melts with Al displayed the highest mechanical tensile strength values, but also had a relatively greater elongation. All created hot-melts were suitable for reversible adhesion of similar polyolefins, with the one based on HDPE and Fe considered the most efficient for bonding HDPE, and the one based on PP and Al for PP bonding. When bonding dissimilar polyolefins, it seems that the technique is only effective with hot-melts that include Al. According to the reversible bonding diagrams for specific substrates and hot-melt combinations, and considering the optimization of energy consumption in relation to productivity, the most cost-effective way is to utilize 850 × 103 W/kg power with a maximum exposure time of 1 min. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Polymers (20734360) is the property of MDPI and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.3390/polym18020228 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 24 StartPage: 228 Subjects: – SubjectFull: Polyolefins Type: general – SubjectFull: Hot melt adhesives Type: general – SubjectFull: Tensile strength Type: general – SubjectFull: Electromagnetic waves Type: general – SubjectFull: Sealing (Technology) Type: general – SubjectFull: Metallic oxides Type: general – SubjectFull: Metal powders Type: general Titles: – TitleFull: Reversible Joining Technology for Polyolefins Using Electromagnetic Energy and Homologous Hot-Melt Adhesives Containing Metallic and Ferrite Additives. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Ciobanu, Romeo Cristian – PersonEntity: Name: NameFull: Aradoaei, Mihaela – PersonEntity: Name: NameFull: Ursan, George Andrei – PersonEntity: Name: NameFull: Caramitu, Alina Ruxandra – PersonEntity: Name: NameFull: Marinescu, Virgil – PersonEntity: Name: NameFull: Eva, Rolland Luigi IsPartOfRelationships: – BibEntity: Dates: – D: 15 M: 01 Text: Jan2026 Type: published Y: 2026 Identifiers: – Type: issn-print Value: 20734360 Numbering: – Type: volume Value: 18 – Type: issue Value: 2 Titles: – TitleFull: Polymers (20734360) Type: main |
| ResultId | 1 |
