Methods for improving the resistance of fumigant sorption in produce containers made from expandable polystyrene particles in a fumigation process, and related produce containers. An embodiment involves pre-expanding the expandable polystyrene particles to form pre-expanded particles； applying a coating comprised of a chemical selected from the group consisting of mineral oil, polyethylene wax, ethylene vinyl alcohol copolymer, and polyethylene glycol to the pre-expanded particles and in amount of 0.05 to 5.0 parts per hundred； and forming the container from the pre-expanded particles. A further embodiment involves applying the chemical coating to the expandable particles； pre-expanding the expandable polystyrene particles to form pre-expanded particles； and forming the containers from the pre-expanded particles. Other methods involve increasing the cell size of the expandable particles used to form the produce container.本發明係關於一種用於在燻蒸處理中改良由可膨脹聚苯乙烯粒子製成之農產品容器中對燻蒸劑吸附之抗性的方法，及相關農產品容器。一實施例包括使可膨脹聚苯乙烯粒子預膨脹以形成預膨脹粒子；將一塗層塗覆於該等預膨脹粒子上，該塗層包含0.05%至5.0%之量的選自由以下各物組成之群之化合物：礦物油、聚乙烯蠟、乙烯乙烯醇共聚物及聚乙二醇；及自該等預膨脹粒子形成該容器。另一實施例包括將該化合物塗層塗覆於該等可膨脹粒子；使該等可膨脹聚苯乙烯粒子預膨脹以形成預膨脹粒子；及自該等預膨脹粒子形成該等容器。其他方法涉及增加用於形成該農產品容器之可膨脹粒子的氣室尺寸。
