Experimental Researches Regarding the Manufacturing of New Thermoplastic Materials Used in Additive Technologies

Polylactic acid (PLA) is one of the most extensively used biodegradable aliphatic polyester produced from renewable resources, such as corn starch. Due to its qualities, PLA is a leading biomaterial for numerous applications in medicine as well as in industry, replacing conventional petrochemical - based polymers. The purpose of this paper is to highlight the mechanical properties, such as tensile stress, of pure PLA specimens in comparison with PLA based-composites, with three different added materials in PLA mass: Copper, Aluminum and Graphene, as well as the influence of filament angle deposition on these properties. In order to check if the the filling density of the specimen influences the ultimate tensile stress (UTS), three different filling percentages (60%, 80% and 100%) have been chosen in the experimental tests. In this context, the mechanical characteristics of four different filament types based on PLA material, starting from pure PLA to PLA with Aluminum, Copper or Graphene filler are compared. Understanding and controlling these parameters is essential for the successful use of PLA and PLA-based composites in different areas such as medical applications, sport equipments and light industry.These tests have been performed due to the fact there is a lack of information concerning the mechanical properties. In the scientific literature, such information is only available for expensive printing systems; for open source printers (as those used in these tests), the information is poor and for some new materials, even inexistant. According to the technical specifications, for an expensive printer the cost may exceed 3000 Euros, with a minimum layer resolution of 100 m, this type of printer can reliably reproduce many 3D objects accurately, in quiter conditions.

mentioning

confidence: 99%

Tensile Behavior of PLA and PLA Composite Materials Under Different Printing Parameters

Dobrescu¹,

Pascu²,

Jiga³

et al. 2019

“…The current research deals with the design and use of plastic material for the knee prosthesis. The research is also based on the use of Rapid Prototyping technique [1][2][3][4][5][6][7][8][9].…”

mentioning

confidence: 99%

Additive Manufactured Bioplastics for Conceptual Models of Knee Customized Prostheses

Prisecaru¹,

Besnea²,

Moraru³

et al. 2019

Self Cite

The article presents a promising technology for medical applications - additive technology by thermoplastic extrusion. Some conceptual models for knee prostheses of different constructional forms have been made using FDM technology. Different materials, including biocompatible, were considered and different 3D printing equipment was used to choose the variant with the most optimal characteristics. These conceptual models can have various beneficial applications in medicine, improving the quality and functionality of personalized prostheses.

“…In accordance with the specialized literature, the ideal splint should be light, adaptable, easy to remove and inexpensive [12]. The nasal splint involves molding and a plaster that should be used for at least 2 weeks using materials such as thermoplastic [13], fiberglass, metal or acr ylic splints [14][15][16]. Despite the fact that the postoperative use of splints has been a widespread practice, surgical tape is still being considered as an alternative by plastic surgeons [17].…”

mentioning

confidence: 99%

Research on the Effects of Immobilizing the Nasal Region with a Thermoplastic Splint in Case of Patients who have Undergone Rhinoplasty

Bejinariu¹,

Giuglea²,

Marinescu³

2019

The current study relates to the immobilization of the nasal region with splints using modern materials such as thermoplastic compounds in patients that have undergone rhinoplasty. The objectives of the research are to highlight the main characteristics of thermoplastic splints and to perform a comparative analysis in relation with traditional splints. The research was conducted on 2 batches, the first batch involving 24 patients that have undergone rhinoplasty, the postoperative immobilization being performed using metallic splints and the second batch involving 29 patients, thermoplastic splints being used for immobilization after the surgery. The results of the study are focused on evaluating both thermoplastic and traditional splints based on several criteria, such as modeling capacity, toxicity, surgical risks and patients� degree of satisfaction.