Low-Odor Polyolefin Resin Foam Through Aldehyde Content Control

The invention changes the chemical composition parameters by introducing specific antioxidants (1.0-5.0 parts by mass relative to 100 parts by mass of polyolefin resin) and crosslinking aids (2.0-5.0 parts by mass relative to 100 parts by mass of polyolefin resin), then applies ionizing radiation (1.0-5.0 Mrad) to transform the resin structure. This reduces aldehyde compounds to 0.1 ppm or less while maintaining the foam's heat resistance and insulation properties.

The invention converts the harmful thermal degradation process that produces odorous aldehyde compounds into a beneficial crosslinking process. By controlling the crosslinking conditions and using specific additives, the thermal energy that would normally cause decomposition is instead used to create a crosslinked structure that suppresses further degradation and odor generation.

The invention replaces complex mechanical crosslinking processes with ionizing radiation (electron beams or gamma rays). This substitution eliminates the need for additional crosslinking equipment, molds, and processing steps while achieving uniform crosslinking throughout the foam structure, thereby improving rigidity without increasing manufacturing complexity.

The crosslinking aid is incorporated into the foam composition during the initial mixing stage, before foaming and crosslinking. This preliminary incorporation ensures uniform distribution of the crosslinking catalyst throughout the resin matrix, enabling efficient and uniform crosslinking when ionizing radiation is applied, thereby simplifying the overall manufacturing process.