The GB/T 1034 - 2008 standard is used to determine the water-absorption of plastics. It specifies the specific methods for testing the water-absorption of plastics, covering the preparation of the sample, setting the soaking environment, controlling the soaking time, and the calculation method of water-absorption. Operating according to this standard, the water absorption data of plastics can be accurately obtained. These data are essential for evaluating the performance Stability of plastics in humid environments, and provide a key material selection and quality control basis for the application of plastics in fields such as Encasement and Construction.