Laser transmission welding of poly(lactic acid) and polyamide66/sepiolite nanocomposites

Navas‐Martos, Francisco J.; Yebra‐Rodríguez, África; Rubia, M. Dolores La

doi:10.1002/app.46638

Cited by 12 publications

(7 citation statements)

References 35 publications

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“…Working with the same fluence radiated on the joint surface, but with greater laser power and scanning speed, means reducing the interaction times between the laser beam and the polymer itself. Probably, this reduces the thermal degradation phenomena of the polyolefin and also of the heat sealable lacquer, allowing the welding joint to exhibit a better behavior during the tensile test [28]. However, as seen in the previous section, some wrinkles appear on the aluminum surface, because of the quick heating-cooling cycle.…”

Section: Joints Between Films In Al 50 μM-pp 80 μM White and Transparentmentioning

confidence: 90%

Laser transmission welding of aluminum film coated with heat sealable co-polyester resin with polypropylene films for applications in food and drug packaging

Gisario

Aversa

Barletta

et al. 2022

Int J Adv Manuf Technol

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The present work deals with the high-power diode laser joining process of aluminum films coated with a polyester resin with polypropylene (PP) films. The first part of the work focused on analyzing the coating process of aluminum films with a polyester resin, using an automatic applicator. The second part of the work was focused on the analysis of the laser joining process of coated aluminum films with plastic counterparts made of PP. Different thicknesses and colors of the PP parts were tested in order to analyze the joining process under a wide range of different conditions. The experimental plan involved the study of the influence of the laser joining parameters, in particular the scanning speed and beam power, on the joints. The joints between aluminum and PP films were subsequently tested by means of tensile and peel-off tests. All the joints between aluminum and PP are obtained through the so-called laser transmission welding (LTW) mechanism. Analysis of the mechanical response of the welded joints allowed to identify the optimal processing window, that is, the choice of the operational parameters that leads to satisfactory welded joints, stating the high potential of laser systems in the joining process of aluminum and PP films for food packaging applications.

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Section: Joints Between Films In Al 50 μM-pp 80 μM White and Transparentmentioning

confidence: 90%

Laser transmission welding of aluminum film coated with heat sealable co-polyester resin with polypropylene films for applications in food and drug packaging

Gisario

Aversa

Barletta

et al. 2022

Int J Adv Manuf Technol

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show abstract

“…Moreover, energy can be applied in a tightly localized area, and the approach corresponds to high automation and precision control. [ 196 ] In general, laser welding is vulnerable to the interaction of laser irradiation with polymers as they may reflect, transmit, or absorb the radiation. Nevertheless, the absorbance occurs only in a specific section, which is transformed into heat, leading to a melt polymer.…”

Section: Micro/nanomachiningmentioning

confidence: 99%

Current and Future Trends for Polymer Micro/Nanoprocessing in Industrial Applications

et al. 2022

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Polymers are widely used in optical devices, electronic devices, energy‐harvesting/storage devices, and sensors, owing to their low weight, excellent flexibility, and simple fabrication process. With advancements in micro/nanoprocessing techniques and more demanding application requirements, it is becoming necessary to realize high‐resolution fabrication of polymers to prepare miniaturized devices. This is particularly because conventional processing technologies suffer from high thermal stress and strong adhesion/friction, which can irreversibly damage the micro/nanostructures of miniaturized devices. In addition, although the use of advanced fabrication methods to prepare high‐resolution micro/nanostructures is explored, these methods are limited to laboratory research or small‐batch production. This review focuses on the micro/nanoprocessing of polymeric materials and devices with high spatial precision and replication accuracy for industrial applications. Specifically, the current state‐of‐the‐art techniques and future trends for micro/nanomolding, high‐energy beam processing, and micro/nanomachining are discussed. Moreover, an overview of the fabrication and applications of various polymer‐based elements and devices such as microlenses, biosensors, and transistors is provided. These techniques are expected to be widely applied for multiscale and multimaterial processing as well as for multifunction integration in next‐generation integrated devices, such as photoelectric, smart, and biodegradable devices.

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“…Although some alternatives can be performed to carry out this process, the layers of the elements subjected to the joining process usually needs to be positioned in a specific way to ensure that the laser beam can pass through the upper layers. This fact implies that transparent PLA should be placed before other color layers that favors the absorption of the irradiation energy [18,[22][23][24]. In addition, the application of thermal processes by laser avoids the need to prepare/activate the surfaces by means of chemical or mechanical procedures.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of the Joining Response of Biodegradable Polylactic Acid (PLA) from Fused Deposition Modeling by Infrared Laser Irradiation

et al. 2020

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The development of high-complexity geometry parts is one of the main goals of additive manufacturing technology. However, the failure of printed structures and the joining of different parts to create complex assemblies represents a real challenge in the research of efficient and sustainability techniques for the permanent assembly of polymers. Laser welding processes have been used as a single-step method to join metals for years. Nowadays, the growing trend in the use of thermoplastics for additive manufacturing has led to the need to adapt this technique to materials with a very specific nature and which are more sensitive to thermal effects. In addition, the possibility of transmitting the laser beam through transparent polymer layers allows to us focus the energy supply on internal sections of the assembled components. In this research, an infrared laser marking system was used to join two different samples of polylactic acid manufactured by fused deposited modeling technology. In order to increase the effectiveness of the bonding process, a transparent and a dark sample have been used as assembly material, focusing the laser beam on the interface area of the two parts. By means of tensile tests, dimensional measurement and the use of optical microscopy techniques, a basis was established that links the supplied energy by laser to the joining performance.

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Laser transmission welding of poly(lactic acid) and polyamide66/sepiolite nanocomposites

Cited by 12 publications

References 35 publications

Laser transmission welding of aluminum film coated with heat sealable co-polyester resin with polypropylene films for applications in food and drug packaging

Laser transmission welding of aluminum film coated with heat sealable co-polyester resin with polypropylene films for applications in food and drug packaging

Current and Future Trends for Polymer Micro/Nanoprocessing in Industrial Applications

Evaluation of the Joining Response of Biodegradable Polylactic Acid (PLA) from Fused Deposition Modeling by Infrared Laser Irradiation

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