Exploration of methods to reduce offensive odors in plastic processing

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During the plastic processing, especially when processing materials containing recycled content, toxic and harmful gases such as CO2, SO2, nitrogen oxides (NOx), and ammonia (NH3) are likely to be generated at certain processing temperatures. This results in unpleasant odors that affect the usability of the products. In addition, many compounds added to plastics also have unpleasant odors, including amines, phenols, thiols, peroxides, benzene, aldehydes, and various plasticizers and flame retardants. Solvents used in the plastic processing process as well release strong chemical odors; therefore, multiple methods must be employed to effectively reduce these odors. Commonly used adsorbents in industry include silica gel, activated alumina, activated carbon, molecular sieves, etc. In addition, there are also multifunctional adsorption materials developed for the selective adsorption of certain components. The success of gas absorption depends to a large extent on the properties of the adsorbent; therefore, selecting an appropriate adsorbent is the primary issue in determining the adsorption process. The JL-XF01 plastic processing odor gas absorbent developed and produced by Nanjing Jinlaiwang Plastic Technology Co., Ltd. (www.njjlw.cn) is a new type of multi-functional odor gas adsorbent. It features a porous structure synthesized through a special process; its three-dimensional porous framework is formed by tetrahedra connected at multiple points, and this framework contains various sub-nanometer-sized cavities and channels, giving it high porosity and thus strong adsorption capabilities. By taking advantage of its unique molecular pore structure and modifying it through special processes, an absorbent for unpleasant odors in plastic processing can be created. This absorbent possesses both physical and chemical adsorption capabilities; therefore, when added in appropriate amounts during plastic processing, it can eliminate unwanted odors in plastic products over time. In foam production systems, it is particularly effective at absorbing residual gases within the products.