Technical Principles of Compressed Mattresses

Compression rate refers to the percentage change in height-comparing the post-compression (vacuum-compressed/roll-packed) state to the pre-compression state-with the standard requiring a rate of ≥70%.
Rebound time refers to the duration required for a vacuum-compressed (roll-packed) mattress to freely recover to a stable state after unpacking; the standard classifies this into four grades: A+ (≤30 minutes), A (≤3 hours), B (≤24 hours), and C (≤72 hours).
Rebound rate refers to the ratio of the height after stabilization to the original height, with the standard requiring ≥90%.
The standard specifies permissible deviations of ±20 mm for length, width, and height, and sets requirements regarding the degree of edge and corner deformation.
It also outlines other technical requirements, including sensory attributes, durability, fabric physical properties, flame retardancy, packaging specifications, and limits on hazardous substances.
The standard details test methods for key performance indicators-such as temperature resistance, rebound time, and rebound rate-and stipulates the rules for type testing and factory inspection that products must pass.