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Correction published on 12 July 2021, see Polymers 2021, 13(14), 2280.
Article

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

1
Department of Sports Medicine/Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-ku, Tokyo 113-8549, Japan
2
Department of Maxillofacial Prosthetics, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-ku, Tokyo 113-8549, Japan
3
Department of Oral Biomaterials Engineering, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-ku, Tokyo 113-8549, Japan
4
Moe Myitta Dental Clinic, No.117, Corner of 26th × 76th Street, Chaayetharsan Township, Mandalay 05024, Myanmar
5
Department of Prosthodontics, The University of Dental Medicine, Mandalay, 62nd Street, Chan Mya Thazi Township, Mandalay 05041, Myanmar
*
Author to whom correspondence should be addressed.
Academic Editors: Dong Jin Yoo and Mohanraj Vinothkannan
Polymers 2021, 13(11), 1879; https://doi.org/10.3390/polym13111879
Received: 10 May 2021 / Revised: 27 May 2021 / Accepted: 2 June 2021 / Published: 5 June 2021
(This article belongs to the Collection Progress in Polymer Applications)
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. View Full-Text
Keywords: face guard; 3D-printed polymer; 3D-knitted fabric; flexural strength; shock absorption ability; air permeability; wearing comfort face guard; 3D-printed polymer; 3D-knitted fabric; flexural strength; shock absorption ability; air permeability; wearing comfort
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MDPI and ACS Style

Aung, T.K.; Churei, H.; Tanabe, G.; Kinjo, R.; Togawa, K.; Li, C.; Tsuchida, Y.; Tun, P.S.; Hlaing, S.; Takahashi, H.; Ueno, T. 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. https://doi.org/10.3390/polym13111879

AMA Style

Aung TK, Churei H, Tanabe G, Kinjo R, Togawa K, Li C, Tsuchida Y, Tun PS, Hlaing S, Takahashi H, Ueno T. 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(11):1879. https://doi.org/10.3390/polym13111879

Chicago/Turabian Style

Aung, Thet K., Hiroshi Churei, Gen Tanabe, Rio Kinjo, Kaito Togawa, Chenyuan Li, Yumi Tsuchida, Phyu S. Tun, Shwe Hlaing, Hidekazu Takahashi, and Toshiaki Ueno. 2021. "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 13, no. 11: 1879. https://doi.org/10.3390/polym13111879

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