Laminate comprising a composition based on a polyamide homopolymer or copolymer and a thermoplastic elastomer

The laminate structure with a central polyamide and thermoplastic elastomer layer, flanked by specific polyamide layers, addresses assembly and adhesion issues in non-pneumatic tires, enhancing grip and reducing stress concentration while maintaining lightweight design.

WO2026125311A1 Publication Date: 2026-06-18MICHELIN & CO (CIE GEN DES ESTAB MICHELIN)
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Patent Information

Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
MICHELIN & CO (CIE GEN DES ESTAB MICHELIN)
Filing Date
2025-12-09
Publication Date
2026-06-18

AI Technical Summary

⚠Technical Problem

Non-pneumatic tires face challenges in industrial assembly methods like riveting and welding, which increase weight and concentrate mechanical stress, and adhesion issues arise due to differences in composition among tire components, affecting grip, rolling resistance, and load support.

⚗Method used

A laminate structure comprising a central layer with a polyamide homopolymer or copolymer and thermoplastic elastomer, flanked by adjacent layers with specific polyamide compositions, enhancing adhesion through a polymer matrix that includes flexible and rigid polyamide blocks linked by amide bonds.

🎯Benefits of technology

The laminate structure improves adhesion between layers of differing compositions, ensuring good grip, low rolling resistance, and even pressure distribution, reducing mechanical stress concentration and weight, suitable for non-pneumatic tires.

✦ Generated by Eureka AI based on patent content.

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Abstract

The invention relates to a laminate comprising at least one core layer arranged between and in contact with an adjacent first layer and an adjacent second layer. The core layer comprises a polymer composition, the polymer matrix of which comprises from 40% to 60% by mass of at least one polymer A comprising repeating units A1 interconnected by an amide bond, and from 40% to 60% by mass of at least one thermoplastic elastomer B comprising at least one flexible polyether-type block and at least one rigid polyamide-type block, the rigid block comprising repeating units B1 interconnected by an amide bond, which units B1 are different from the repeating units A1. The adjacent layers respectively comprise polymers C and D having a polyamide block that comprises repeating units C1 that are identical to the repeating units A1 and a polyamide block that comprises repeating units D1 that are identical to the repeating units B1.
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