A high resilience mattress sponge and method of making same

By combining polyols with modified isocyanates in specific components and proportions, high-resilience sponges are prepared, which solves the problems of insufficient resilience, support and durability of polyurethane sponges in the prior art. High resilience, excellent support and durability are achieved, and the damp heat aging performance is enhanced.

CN120574370BActive Publication Date: 2026-01-27DONGGUAN YONGHUA SPONGE PROD CO LTD
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Patent Information

Application Number
CN202510921986.4
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2025-07-04
Publication Date
2026-01-27
Estimated Expiration
2045-07-04

AI Technical Summary

Technical Problem

In existing technologies, polyurethane foam has insufficient resilience, support, durability, and aging performance, especially in mattress applications where it fails to meet high requirements.

Method used

A high-resilience sponge is prepared by combining polyether polyol, polymer polyol and cashew nut shell oil phenolic resin polyol with modified isocyanate in a specific ratio and with a specific foam stabilizer through mixing and foaming. This improves its resilience, support and durability, and enhances its wet heat aging performance.

Benefits of technology

The prepared high-resilience sponge has good resilience, moderate indentation ratio, high hardness and tensile strength, and excellent resistance to damp heat aging and low temperature, which reduces hardness loss after repeated indentation fatigue and improves durability.

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Abstract

The application belongs to the technical field of polyurethane sponge and specifically relates to a high-resilience sponge for mattresses and a preparation method thereof; the high-resilience sponge for mattresses comprises components A and B in a mass ratio of 100:40-60; the component A comprises, in mass parts, 100 parts of polyol, 2-5 parts of foaming agent, 0.1-0.5 parts of catalyst and 0.3-1 parts of foam stabilizer; the polyol comprises polyether polyol, polymer polyol and cashew nut shell oil phenol-formaldehyde resin polyol in a mass ratio of 6-8:1-2:0.1-0.2; the component B comprises modified isocyanate; the modified isocyanate is a mixture of polyol-modified diphenylmethane diisocyanate and polymethylene polyphenyl isocyanate. The sponge for mattresses provided by the application has high resilience and also has excellent support, durability and aging resistance.
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