Improved cvr (glass resin composite) monofilament

A composite material and glass resin technology, applied to the reinforcement layer of pneumatic tires, other household appliances, transportation and packaging, etc., can solve problems such as the collapse of CVR monofilament structures

Active Publication Date: 2017-04-05
MICHELIN & CO CIE GEN DES ESTAB MICHELIN
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Problems solved by technology

[0014] It is particularly surprising to note that when these prior art CVR monofilaments are used as belt reinforcements for certain pneumatic tires, during the manufacture of these tires it is especially known that high pressures and extremely high temperatures (often These prior art CVR monofilaments may undergo a certain amount of compression cracking due to a significant collapse of their structure during the final step of curing these tires in the mold, carried out at temperatures greater than 160° C.

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  • Improved cvr (glass resin composite) monofilament
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  • Improved cvr (glass resin composite) monofilament

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[0031] In this patent application, unless otherwise indicated, all percentages (%) shown are percentages by weight.

[0032] Furthermore, any numerical range represented by the expression "between a and b" represents a numerical range from greater than a to less than b (i.e., excluding endpoints a and b), while any numerical range represented by the expression "a to b" By range is meant a range of values ​​extending from a to b (ie, including the strict endpoints a and b).

[0033] The present invention therefore relates to a monofilament made of glass resin composite (abbreviated CVR) comprising glass filaments embedded in a crosslinked resin, characterized in that:

[0034] - said resin has a glass transition temperature (expressed as Tg) equal to or greater than 190°C;

[0035] - said monofilament has an elongation at break (expressed as Ar) equal to or greater than 4.0% measured at 23°C;

[0036] - the initial tensile modulus (in E) of the monofilament measured at 23°C ...

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Abstract

The present invention relates to monofilaments made of glass resin composites having improved compressive properties, especially at elevated temperatures. The monofilament comprises a glass filament wrapped in a cured resin, and the monofilament is characterized in that: the glass transition temperature of the resin is not lower than 190°C; the elongation at break of the monofilament measured at 23°C is not lower than 4.0%; the initial monofilament elongation modulus measured at 23°C is greater than 35 GPa; and the real part of the complex modulus of the monofilament measured by the DTMA method at 190°C is greater than 30 GPa. The present invention is applicable to pneumatic tires and non-pneumatic tires reinforced with such composite monofilaments.

Description

technical field [0001] The field of the invention is that of composite reinforcements that can be used in particular to reinforce semi-finished or finished products made of rubber, such as vehicle tires of the pneumatic or non-pneumatic type. [0002] More specifically, the present invention relates to monofilaments of CVR (which is an abbreviation for Glass Resin Composite) type having high mechanical properties, said monofilaments comprising continuous unidirectional multifilament glass fibers embedded in a resin, said monofilaments Can be used in particular as a reinforcing element (or "reinforcement") for these tires. Background technique [0003] In order notably to reduce the weight of the tire and to compensate for the various problems of corrosion, tire designers have long sought to find reinforcements of low-density textile or composite material that could advantageously and effectively replace conventional wires or cords. [0004] Thus, patent application EP 1 167...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D02G3/18C08J5/08D02G3/40
CPCD02G3/18D02G3/404B29D2030/383D10B2505/02D10B2505/022B60C7/00B60C7/24B60C9/0028B60C9/0042B60C9/005B60C9/02B60C9/2003B60C15/04B60C2009/0071B60C2009/0078B60C2009/2074B60C2009/2077B60C2009/208B60C2009/2093B60C2015/042C08J5/043C08J2331/02
Inventor A·德尔菲诺J-P·梅拉尔迪
Owner MICHELIN & CO CIE GEN DES ESTAB MICHELIN
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