Ecological Approaches in Textile Sector: The Effect of r-PET Blend Ratio on Ring Spun Yarn Tenacity. Periodicals of Engineering and Natural Sciences, [S. l.], v. 5, n. 2, 2017. DOI: 10.21533/pen.v5.i2.1772. Disponível em: https://pen.ius.edu.ba/index.php/pen/article/view/1772. Acesso em: 3 jun. 2026.