Multiple Composite Flat Reinforcement

Abstract

The present invention relates to a flat reinforcement with improved mechanical properties, said flat reinforcement having the shape of a multiple composite strip (R1), wherein said reinforcement defines three main perpendicular directions: axial direction (X), transverse direction (Y) and radial direction (Z), the flat reinforcement has a width LR measured along the Y direction between 2 and 100 mm and has a thickness measured along the Z direction between 0.1 and 5 mm ER, LR / ER ratio greater than 3. The multi-composite tape comprises at least: a plurality of monofilaments (10) made of composite material, oriented along the X-direction and comprising inorganic material (101) embedded in a thermosetting resin (102) The formed thread, the glass transition temperature (Tg1) of the thermosetting resin (102) is greater than 70°C. The monofilament is coated with a layer of thermoplastic material (12). The invention also relates to a multilayer laminate comprising said multiple composite planar reinforcement. The invention further relates to a pneumatic or non-pneumatic tire reinforced with said multiple composite reinforcement or said multilayer laminate.

Description

technical field [0001] The field of the invention is that of composite reinforcements and multilayer laminates that can be used in particular to reinforce rubber articles, such as vehicle tires of the pneumatic or non-pneumatic type. [0002] The invention relates more particularly to composite reinforcements in the form of strips based on composite monofilaments consisting of threads of mineral material embedded in a thermosetting resin with high mechanical and thermal properties, and to said monofilaments The use of filaments as reinforcing elements for these tires. Background technique [0003] Tire designers have long sought low-density textile or composite type "reinforcements" (elongated reinforcing elements) that could be beneficial and effective alternatives to conventional wire or cords, with the aim of reducing the weight of these tires inter alia and remediating any corrosion question. [0004] Thus, patent application EP 1 167 080 (or US 7 032 637) describes mo...

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Problems solved by technology

[0007] It is particularly surprising to note that when used as a belt reinforcement for some pneumatic tires, during the manufacture of these tires, more specifically during the shaping step and / or the final step of curing these tires in the mold (As is known, these processes are carried out under high pressure and very high temperature (usually greater than 160 ° C)), these composite monofilaments in the prior art may be subjected to a certain number of compression due to the collapse or buckling of their structure. break

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