Hot pressing process of PBO fiber wet-laid nonwoven materials

Abstract

In order to improve the mechanical properties of PBO fiber wet-laid forming mesh, the hot pressing process was used to strengthen it, and the Box-Behnken response surface method was used to establish a response surface model by taking three factors of hot pressing temperature, hot pressing pressure and hot pressing time as independent variables, and taking the fracture strength of PBO fiber wet-laid nonwoven materials as the response value. The results show that the established response surface model is significant and has good fit. The Box-Behnken response surface method can predict the fracture strength of PBO fiber wet-laid nonwoven materials, and conclude that the factors affecting the fracture strength of PBO fiber wet-laid nonwoven materials are hot pressing pressure > hot pressing temperature > hot pressing time. The optimize process parameters of hot pressing are hot pressing temperature 245.6 ℃, hot pressing pressure 8.4 MPa, and hot pressing time 9.3 min. The average breaking strength of PBO fiber wet-laid nonwoven material obtained under this process parameter is 393.9 N.

Keywords

• pbo fiber
• wet-laid nonwoven material
• box-behnken response surface method
• hot pressing