公开(公告)号：US20240264078A1

公开(公告)日：2024-08-08

申请号：US18569746

申请日：2022-06-17

Applicant: REPSOL, S.A.

Inventor： MIGUEL RUBIO MORENO ,  FRANCISCO JAVIER CARVAJAL GONZÁLEZ ,  SONIA SEGURA FERNÁNDEZ ,  ENRIQUE DOMÍNGUEZ RAMOS

IPC: G01N21/3563 ,  B07C5/342 ,  B29B17/02 ,  B29K75/00 ,  B29K105/04 ,  B29K105/06

CPC classification number: G01N21/3563 ,  B07C5/342 ,  B29B17/02 ,  B29B2017/0203 ,  B29B2017/0279 ,  B29K2075/00 ,  B29K2105/04 ,  B29K2105/065 ,  G01N2201/127 ,  G01N2201/129

Abstract: A method for sorting flexible polyurethane foams including: a) providing two or more calibration samples of conventional flexible polyurethane foams, two or more calibration samples of high resilience (HR) flexible polyurethane foams, and two or more calibration samples of viscoelastic flexible polyurethane foams, and obtaining a mid-infrared (MIR) spectrum of each calibration sample; b) carrying out a spectral pre-processing of the spectra of all the calibration samples and, then a first PCA to define a first library; c) carrying out a spectral pre-processing of the infrared spectra of conventional and HR calibration samples and, then a second PCA to define a second library; d) obtaining the MIR spectrum of a sample of polyurethane foam and, based on the first and second libraries, classifying the sample of polyurethane foam as a conventional, HR or viscoelastic polyurethane foam, or as a foam that is neither a conventional, a HR or a viscoelastic polyurethane foam.