scholarly journals Correction: Aung et al. Air Permeability, Shock Absorption Ability, and Flexural Strength of 3D-Printed Perforated ABS Polymer Sheets with 3D-Knitted Fabric Cushioning for Sports Face Guard Applications. Polymers 2021, 13, 1879

Polymers ◽  
2021 ◽  
Vol 13 (14) ◽  
pp. 2280
Author(s):  
Thet Khaing Aung ◽  
Hiroshi Churei ◽  
Gen Tanabe ◽  
Rio Kinjo ◽  
Kaito Togawa ◽  
...  
Keyword(s):  
Flexural Strength ◽  
Air Permeability ◽  
Knitted Fabric ◽  
Shock Absorption ◽  
Polymer Sheets ◽  
3D Printed

Error in Figures 3 and 6 [...]

scholarly journals Air Permeability, Shock Absorption Ability, and Flexural Strength of 3D-Printed Perforated ABS Polymer Sheets with 3D-Knitted Fabric Cushioning for Sports Face Guard Applications

Polymers ◽  
2021 ◽  
Vol 13 (11) ◽  
pp. 1879
Author(s):  
Thet Khaing Aung ◽  
Hiroshi Churei ◽  
Gen Tanabe ◽  
Rio Kinjo ◽  
Kaito Togawa ◽  
...  
Keyword(s):  
Flexural Strength ◽  
Acrylonitrile Butadiene Styrene ◽  
Air Permeability ◽  
Return To Play ◽  
Knitted Fabric ◽  
Shock Absorption ◽  
Knitted Fabrics ◽  
Honeycomb Structures ◽  
Polymer Sheets ◽  
3D Printed

Sports face guards (FGs) are devices that protect athletes from maxillofacial injury or ensure rapid return to play following orofacial damage. Conventional FGs are uncomfortable to wear owing to stuffiness caused by poor ventilation and often slip off due to increase in weight due to absorption of moisture from perspiration, lowering players’ performance. Herein, combinations of 3D-printed perforated acrylonitrile butadiene styrene (ABS) polymer sheets and 3D-knitted fabrics with honeycomb structures as cushioning materials were investigated to balance better wearing feel and mechanical properties. The flexural strength, weight, and shock absorption ability of, and air flow rate through, the ABS sheets with five different perforation patterns were evaluated and compared with those of conventional FG materials comprising a combination of polycaprolactone sheets for the medical splint and polychloroprene rubber for the cushioning material. The ABS sheets having 10% open area and 2.52 mm round holes, combined with knitted fabric cushioning, exhibited the requisite shock absorbing, higher air permeability, and lower weight properties than the conventional materials. Our results suggest that FGs fabricated using combinations of 3D-printed perforated ABS polymer sheets and 3D-knitted fabrics with honeycomb structures may impart enhanced wearing comfort for athletes.

Optimization of Knitted Fabric Comfort and UV Protection using Desirability Function

2016 ◽  
Vol 11 (4) ◽  
pp. 155892501601100 ◽  
Author(s):  
Anindya Ghosh ◽  
Prithwiraj Mal ◽  
Abhijit Majumdar ◽  
Debmalya Banerjee
Keyword(s):  
Thermal Conductivity ◽  
Desirability Function ◽  
Air Permeability ◽  
Quality Parameters ◽  
Uv Protection ◽  
Knitted Fabric ◽  
Uv Resistance ◽  
Knitted Fabrics ◽  
Target Values ◽  
Fabric Comfort

The present study deals with the optimization of multiple quality parameters of single jersey and 1×1 rib knitted fabrics using the desirability function approach. Comfort properties such as air permeability, thermal conductivity and safety properties such as UV protection are combined to yield an ‘overall desirability’ varying from zero to one. The overall desirability has been maximized versus target values for air permeability, thermal conductivity and UV resistance. Experimental validation confirms that the proposed method can be used to design a knitted fabric with desired comfort and UV resistance characteristics.

Analysis of physical properties and structure design of weft-knitted spacer fabric with high porosity

2016 ◽  
Vol 88 (1) ◽  
pp. 59-68 ◽  
Author(s):  
Chaoyu Chen ◽  
Zhaoqun Du ◽  
Weidong Yu ◽  
Tilak Dias
Keyword(s):  
Three Dimensional ◽  
Middle Layer ◽  
Air Permeability ◽  
Structure Design ◽  
Experimental Results ◽  
Knitted Fabric ◽  
High Porosity ◽  
Compression Properties ◽  
Plain Knitted Fabric ◽  
Spacer Fabric

The main content dealt with in the paper is to present a kind of weft-knitted spacer fabric with high porosity. It is a kind of three-dimensional textile fabric with a sandwich structure that consists of a middle layer of multifilament and two outer layers of plain-knitted fabric. Compared with traditional warp-knitted spacer fabric as cushion mats, weft-knitted spacer fabric is well used as apparel for good softness, thermal/moisture comfort, and air permeability. Therefore, three structures were designed and nine samples were prepared by choosing plain-knitted fabric as the outer layers and selecting soft and thin multifilament as a middle layer. Experimental results show that this kind of weft-knitted spacer fabrics has high porosity, greater than 86%, and also demonstrate that the weft-knitted spacer fabric is suitable for comfortable apparel based on experimental results of air permeability, compression properties, stiffness, and thermal insulation properties.

The Effect of Tucking Courses' Number on Performance of Knitted Fabric

2012 ◽  
Vol 627 ◽  
pp. 353-356
Author(s):  
Yu Ying Qiu
Keyword(s):  
Cotton Fiber ◽  
Air Permeability ◽  
Knitted Fabric

In this paper, four types of single needle tuck stitches which have different tuck courses are designed and programmed through M1PLUS software. Using the blended yarns of apocynum fiber and cotton fiber (10/90), these tuck stitched are knitted by STOLL computer flat knitting machine. Through testing, comparing and analyzing on dimension property, thickness, air permeability and drape, the change regulation of tuck structures is grasped so as to guide the design of the knitting fabric.

Properties Test and Analysis of Aloe Fiber Knitted Fabric

2012 ◽  
Vol 503-504 ◽  
pp. 641-645
Author(s):  
Xiao Ting Feng ◽  
Jia Guang Meng ◽  
Juan Bai
Keyword(s):  
Comprehensive Evaluation ◽  
Air Permeability ◽  
Fuzzy Mathematics ◽  
Knitted Fabric ◽  
Moisture Permeability ◽  
Autumn And Winter

This article mainly introduced various properties of knitted fabric made of aloe fiber, including air permeability, moisture permeability, fastness, rigidity and flexibility, heat retention property, crease recovery, and made a comprehensive evaluation with fuzzy mathematics. Finally we obtained the best stitches applying to spring, summer, autumn and winter.

Pilot Study of PET/Bamboo Charcoal Warp-Knitted Fabric

2012 ◽  
Vol 184-185 ◽  
pp. 1090-1093 ◽  
Author(s):  
Jia Horng Lin ◽  
Ching Wen Lin ◽  
Chin Mei Lin ◽  
Yi Chang Yang ◽  
Ting Ting Li ◽  
...  
Keyword(s):  
Far Infrared ◽  
Air Permeability ◽  
Weft Yarn ◽  
Knitted Fabric ◽  
Bamboo Charcoal ◽  
Health It ◽  
Warp Yarn ◽  
Knitted Fabrics ◽  
Far Infrared Ray ◽  
Warp Knitted Fabric

In recent years, as improvement of human living life, people begin to focus on themselves health. It is certain that bamboo charcoal has many properties, including water purification, deodorization, anion release and far-infrared ray radiation. This study aims to prepare PET/BC warp-knitted fabric composed of polyester yarn (PET) as warp yarn and bamboo charcoal polyamine yarn (BC) as weft yarn using Velcro Crochet Machine. Afterwards, air permeability, elastic resilience and far-infrared ray emissivity of resulting knitted fabric were discussed by changing weft yarn type. Result shows that, for knitted fabrics, weft yarn type cannot affect the elastic resilience; yet PET weft yarn makes air permeability decreasing.

scholarly journals The Effect of Number and Position of Tuck Stitches within the Pattern Repeat on Air Permeability of Weft-knitted Fabrics from Glass Yarn

2019 ◽  
Vol 2 (3) ◽  
pp. 317-323
Author(s):  
Mehmet Erdem İnce
Keyword(s):  
Mechanical Properties ◽  
High Performance ◽  
Physical And Mechanical Properties ◽  
Air Permeability ◽  
Knitted Fabric ◽  
Knitted Fabrics ◽  
Synthetic Fibers ◽  
Fabric Structure ◽  
Knit Fabrics ◽  
Weft Knitted Fabric

The fact that weft knitted fabrics has a stretchable, 3D, porous and interlocking structure makes them unique when manufactured from high performance fibers. Knitted fabrics with different architectures exhibit different properties. Different loop forms like tuck and skip stitches with various loop lengths reveal different physical and mechanical properties. Literature review indicated that wisely arrangement of tuck stitches within the pattern repeat alter the weft-knitted fabric structure from natural and synthetic fibers. Therefore, we studied the effect of number and location of tuck stiches on air permeability of weft-knitted fabrics from glass yarn. Single-bed, flat weft knitting machine was used to knit fabrics with different architectures from three-ply glass yarn. The nominal single-end count of used E-glass yarn was 136 tex. It is anticipated that the number and location of tuck stitches within knit pattern effect physical and air permeability properties of weft-knitted fabrics from glass yarn.

scholarly journals Experimental investigation on flexural properties of FDM-processed PET-G specimen using response surface methodology

2021 ◽  
Vol 349 ◽  
pp. 01008
Author(s):  
Nikolaos A. Fountas ◽  
Ioannis Papantoniou ◽  
John D. Kechagias ◽  
Dimitrios E. Manolakos ◽  
Nikolaos M. Vaxevanidis
Keyword(s):  
Flexural Strength ◽  
Response Surface ◽  
Fused Deposition Modeling ◽  
Performance Metrics ◽  
Optimal Parameter ◽  
Strong Dependence ◽  
Control Parameters ◽  
Fused Deposition ◽  
Deposition Modeling ◽  
3D Printed

The properties of fused deposition modeling (FDM) products exhibit strong dependence on process parameters which may be improved by setting suitable levels for parameters related to FDM. Anisotropic and brittle nature of 3D-printed components makes it essential to investigate the effect of FDM control parameters to different performance metrics related to resistance for improving strength of functional parts. In this work the flexural strength of polyethylene terephthalate glycol (PET-G) is examined under by altering the levels of different 3D-printing parameters such as layer height, infill density, deposition angle, printing speed and printing temperature. A response surface experiment was established having 27 experimental runs to obtain the results for flexural strength (MPa) and to further investigate the effect of each control parameter on the response by studying the results using statistical analysis. The experiments were conducted as per the ASTM D790 standard. The regression model generated for flexural strength adequately explains the variation of FDM control parameters on flexural strength and thus, it can be implemented to find optimal parameter settings with the use of either an intelligent algorithm, or neural network.

scholarly journals Effects of the Washing Time and Washing Solution on the Biocompatibility and Mechanical Properties of 3D Printed Dental Resin Materials

Polymers ◽  
2021 ◽  
Vol 13 (24) ◽  
pp. 4410
Author(s):  
Na-Kyung Hwangbo ◽  
Na-Eun Nam ◽  
Jong-Hoon Choi ◽  
Jong-Eun Kim
Keyword(s):  
Mechanical Properties ◽  
Flexural Strength ◽  
Cell Viability ◽  
Laser Scanning ◽  
Flexural Modulus ◽  
Three Dimensional ◽  
Confocal Laser Scanning ◽  
Confocal Laser ◽  
3D Printed ◽  
Resin Restorations

Three-dimensional (3D) printing technology is highly regarded in the field of dentistry. Three-dimensional printed resin restorations must undergo a washing process to remove residual resin on the surface after they have been manufactured. However, the effect of the use of different washing solutions and washing times on the biocompatibility of the resulting resin restorations is unclear. Therefore, we prepared 3D-printed denture teeth and crown and bridge resin, and then washed them with two washing solutions (isopropyl alcohol and tripropylene glycol monomethyl ether) using different time points (3, 5, 10, 15, 30, 60, and 90 min). After this, the cell viability, cytotoxicity, and status of human gingival fibroblasts were evaluated using confocal laser scanning. We also analyzed the flexural strength, flexural modulus, and surface SEM imaging. Increasing the washing time increased the cell viability and decreased the cytotoxicity (p < 0.001). Confocal laser scanning showed distinct differences in the morphology and number of fibroblasts. Increasing the washing time did not significantly affect the flexural strength and surface, but the flexural modulus of the 90 min washing group was 1.01 ± 0.21 GPa (mean ± standard deviation), which was lower than that of all the other groups and decreased as the washing time increased. This study confirmed that the washing time affected the biocompatibility and mechanical properties of 3D printed dental resins.

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