T/CPPIA 2-2020 Special material for dehumidifying plastic

Scope

Scope: This document specifies the terms and definitions, classification and naming, requirements, test methods, inspection rules and marking, packaging, transportation, and storage of plastic desiccant special materials. This document applies to functional granular materials made from calcium oxide as a desiccant, polymer resin as a carrier, and appropriate additives and auxiliaries, which are mixed, kneaded, and granulated for use in plastic processing to remove moisture. Main technical contents: 5.1 Appearance: Plastic desiccant special materials should be well plasticized, have consistent color, and no visible impurity particles to the naked eye. 5.2 Particle size: The total number of particles in plastic desiccant special materials shall be 100~500/10 g, and there shall be no particles larger than 10 mm in any direction in the three-dimensional space. 5.3 Dispersibility: After film blowing for 10 minutes, the film shall not contain any visible particles. 5.4 Melt flow rate: The melt flow rate shall comply with the range and grade specified in the product model. 5.5 Desiccant efficiency: The desiccant efficiency shall be greater than or equal to the percentage value specified in the product model. 5.6 Packaging water resistance: The water resistance shall not exceed 0.2%.

Development Information

Related Standards