Process optimization: Ultrasonic welding of coextruded polymer film

Riedl, Jessica

doi:10.31274/etd-180810-3309

Cited by 1 publication

(4 citation statements)

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“…It is used to fuse contact points on cell phones and other consumer electronics that are generally inaccessible with other welding methods. 7 Riedl 8 studied peel and shear strength and tear resistance of ultrasonically sealed coextruded polyolefin films for packaging applications. The author observed that energy and weld force had a significant effect on peel strength for the majority of the materials and the highest peel strength was found at the highest weld forces and highest energies for all materials.…”

Section: State-of-the-artmentioning

confidence: 99%

“…The higher weld forces may have promoted better alignment between the horn and the anvil, in turn promoting more uniform welding. 8 Nguyen et al 9 investigated the effects of different roller profiles on the microstructure and peel strength of the ultrasonic welding joints of nonwoven fabrics. The results showed that no welding defects, such as cracks or blowholes, were visible in the melted zone.…”

Section: State-of-the-artmentioning

confidence: 99%

“…And the other, the predicted value of the S/N ratio is better than the computed one, and the optimized parametric setting for the peel strength is weld time (1200 ms), hold time (900 ms), and amplitude (75%). Riedl et al 3,8 investigated the peel strength of coextruded polyolefin bags created in a vertical form fill seal machine with ultrasonic end seals. They observed that low energy and amplitude resulted in relatively high strength for the top weld of one material and low production rate resulted in high strength for the top weld of two materials as well as in the bottom weld for two materials.…”

Section: State-of-the-artmentioning

confidence: 99%

“…However, none of the tests were found to be statistically significant. 8 Rajput et al 13 stated lap joints of polypropylene using ultrasonic welding and reported the joint's behavior using Thermogravimetric Analysis (TGA), Fourier transform infrared spectroscopy (FTIR), and Differential Scanning Calorimetry (DSC). Scanning electronic microscopy (SEM) was employed to explore the welded and non-welded areas of the prepared samples.…”

Section: State-of-the-artmentioning

confidence: 99%

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Effect of ultrasonic welding process parameters on peel strength of membranes for tents

Hussen

Kyosev

Pietsch

et al. 2022

Journal of Engineered Fibers and Fabrics

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Ultrasonic welding is a universal, clean, and secure alternative joining method. Alternative joining technologies are used increasingly to fulfill specific functional requirements of the seam, such as fluid impermeability to achieve positive bonding during the assembly of technical textiles. In this research, the effect of important ultrasonic welding parameters on peel strength and weld seam thickness was investigated for flexible and lightweight textile material, which is a valuable innovative hybrid textile for technical applications like architectural, construction, and protective textiles. Three main welding parameters with three different levels were selected based on the preliminary test results of 6 and 12 mm welding widths, and a superimposed type of seam was applied. Light scanning microscopic images were used to examine the effective weld locations and their morphology at the joining interface. The parametric influence of ultrasonic welding technique on-seam quality and their tendencies in the relationship were analyzed. Optimized peel strength yielding parametric levels were also assessed numerically. The result shows that the optimal peel strength value was obtained at a welding speed of 2.318 m/min, power of 119.382 W, and pressure force of 349.729 N for a 12 mm welding width. The weld seam thickness had an inverse relationship with the peel strength, and a higher amount of thickness was reduced to 12 mm welding width than 6 mm. Microscopic cross-sectional image of weld seam indicated that a compressed yarn between the coating material at higher welding power and pressure force in lower welding speed. A nonlinear quadratic numerical model was developed to predict the peel strength, and their results were close to the regressed diagonal line against the actual points. The statistical analysis was carried out to show the significant effect of process parameters on peel strength, whereby the obtained results were statistically significant.

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Section: State-of-the-artmentioning

confidence: 99%

Section: State-of-the-artmentioning

confidence: 99%

Section: State-of-the-artmentioning

confidence: 99%

Section: State-of-the-artmentioning

confidence: 99%

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