Feasibility study on the use of recycled materials for prototyping purposes: A comparative study based on the tensile strength

Abstract

3D printing is considered a disruptive technology and it continues to expand the design space boundaries for prototypes and final products. Sustainability is one of the major objectives for manufacturing, and the use of recycled materials is becoming a relevant sustainability strategy, particularly for improving material resource efficiency. This paper evaluates the suitability of substituting virgin polylactic acid (PLA) for recycled PLA. It describes an experimental plan divided into three phases to evaluate the specimens’ tensile strength. The results showed that recycled PLA could be used thanks to a similar tensile strength, even though this is slightly lower than that of the virgin material. In addition, the infill density and the orientation parameters played a major role in the response. As the infill density approaches 100%, both the maximum load and tensile strength increase sharply. However, when using an infill density of 40%, on average, the specimen resists 58.07% of the maximum load. In addition, because of the anisotropy, the horizontal orientation allowed attaining a higher tensile strength while the vertical orientation provided a lower value. These are relevant insights for prescriptions of the 3D-printing parameters guaranteeing minimum tensile strength in prototyping.

Pivotal role of polylactide in carbon emission reduction: A comprehensive review

“…41 The reduction of carbon dioxide emissions is also achieved through the recycling of raw materials such as PLA, which is frequently used in 3D printing. 44 By recycling PLA, the carbon dioxide emissions that result from transportation to landfills or shipping to customers can be significantly reduced, resulting in environmental benefits. Incorporating PLA into the circular economy model through recycling strategies helps to reduce carbon dioxide emissions and preserve fossil-based raw materials.…”

“…Additionally, the preservation of fossil‐based raw materials and the complete biological degradability of PLA are key principles of the circular economy that contribute to the reduction of carbon dioxide emissions 41 . The reduction of carbon dioxide emissions is also achieved through the recycling of raw materials such as PLA, which is frequently used in 3D printing 44 . By recycling PLA, the carbon dioxide emissions that result from transportation to landfills or shipping to customers can be significantly reduced, resulting in environmental benefits.…”

Tear and Tensile Strength of 100% Cotton Woven Fabrics’ Basic Structures: Regression Modelling

“…In this respect, it is crucial to identify the right ways to decide the parameters before manufacturing fabrics to ensure the tremendous loss of supplies, time, electricity, labor, and money [2][3][4][5][6]. Different fabric manufacturing processes, such as spinning, knitting, non-woven, and braiding, are available [7]. Strong dimensional stability and good cover are seen between them by woven fabric.…”