Szabó Veronika Anna, Kovács András, Jakab Sándor Kálmán, Böcz Tamara Zsuzsanna, Dogossy Gábor
Department of Materials Science and Engineering, Audi Hungária Faculty of Vehicle Engineering, Széchenyi István University, Egyetem tér 1., H-9026 Győr, Hungary.
Institute of Materials Engineering, University of Pannonia, H-8201 Veszprém, Hungary.
Polymers (Basel). 2025 May 4;17(9):1251. doi: 10.3390/polym17091251.
This study investigated the automotive applicability of parts produced from a newly developed foamed recycled polyethylene terephthalate (rPET). The injection molded part contained a combination of both endothermic and exothermic foaming agents and phosphorus (Exolit OP 1240) (OP)- and melamine polyphosphate (MPP)-based flame retardant agents. The parts were produced using a breathing mold technique to achieve a suitable level of foaming. The aim was to produce lighter parts made of recycled material that also complied with the fire safety automotive industry standards. Computer tomographic scans revealed the foam structure formed successfully, which contributed to an improved strength-to-weight ratio. The scans further showcased that larger cells tended to form in the thicker areas within the part, while smaller cells generally formed in the thinner areas. Finite element simulations showed that the large cell formation in the thicker parts had no effect on the part's load bearing property, and there were not stress concentration points after the boundary conditions were defined. The sample produced from the material was determined to be a possible replacement of small-sized automotive components.
本研究调查了由新开发的发泡回收聚对苯二甲酸乙二酯（rPET）制成的部件在汽车领域的适用性。注塑部件包含吸热和放热发泡剂以及基于磷（Exolit OP 1240）（OP）和三聚氰胺聚磷酸盐（MPP）的阻燃剂的组合。这些部件采用呼吸模塑技术生产，以达到合适的发泡水平。目的是生产由回收材料制成的更轻的部件，同时符合汽车行业的消防安全标准。计算机断层扫描显示成功形成了泡沫结构，这有助于提高强度重量比。扫描进一步表明，较大的泡孔倾向于在部件内较厚的区域形成，而较小的泡孔通常在较薄的区域形成。有限元模拟表明，较厚部件中形成的大泡孔对部件的承载性能没有影响，在定义边界条件后也没有应力集中点。由该材料生产的样品被确定为小型汽车部件的一种可能替代品。
