Preparation and characterization of flexible laminated composites impregnated with TPU/SiO₂ for static puncture...

At present, people face the danger of various occupational exposures, resulting in the rapid development of protective composites among which puncture-resistant materials are an essential component. In this article, composites impregnated with polyester polyurethane (TPU)/SiO₂ are used to improve static puncture resistance. Different types of TPU and different concentrations of SiO₂ in the impregnation solution are selected. The mechanical and wearing-related properties of composites are systematically explored and analyzed. The results show that static puncture resistance and tensile strength are improved after impregnation. Meanwhile, the composites can still maintain a good water-vapor transmission rate. The air permeability, tearing strength, elongation at break and flexibility of the composites decrease slightly. This study provides a novel and feasible strategy to prepare a flexible composite with high static puncture resistance as well as excellent wearability which is a desirable candidate as a garment accessory or gaket protecting the human body from puncture risk.