Prediction of the recovery behavior of acrylic carpet under UV radiation and wear after static loading using response surface method

Purpose This study aims to investigate the effects of wear and ultraviolet (UV) radiation on the recovery behavior of carpet piles after load removal, which is a critical factor in carpet performance. Design/methodology/approach Acrylic carpet samples were exposed to different UV durations and then subjected to abrasion. After applying short-term static loads, thickness was measured immediately upon load removal. Response surface methodology (RSM) was used to analyze the effects of wear, UV exposure and time on recovery. Findings The obtained results indicate a two-stage recovery process. In the first stage, the carpet exhibits instantaneous recovery upon load removal. In the second stage, the carpet demonstrates gradual recovery and follows an exponential trend. Both stages were significantly impacted by wear and UV radiation. Increased wear cycles and UV exposure times diminished both instantaneous and gradual recovery, attributed to fiber-end fractures and the disruption of polymer chains, respectively. Originality/value This study systematically investigates the combined effects of UV exposure and wear on the recovery of acrylic carpet pile under static loading conditions in a two-stage process – an aspect that has not been fully addressed in previous research. Unlike earlier studies that analyzed these effects separately, the present work integrates them simultaneously using RSM, thereby providing a comprehensive understanding of their interactive influence. Furthermore, the identification and modeling of a distinct two-stage recovery process offer new insights into the durability and performance of carpets.