Aramid/polyketone composite textile cord
一种芳族聚酰胺、聚酰胺股的技术，应用在复合或混合类型的纺织合股纱线或帘线,胎冠加强件或胎体加强件领域，能够解决聚酰胺-尼龙帘线缺陷、难以令人满意轮胎外胎尺寸、尼龙热缩高等问题
Active Publication Date: 2016-08-17
MICHELIN & CO (CIE GEN DES ESTAB MICHELIN)
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Problems solved by technology
[0005] However, these hybrid aramid-nylon cords have drawbacks
[0006] First of all, the disadvantage of nylon is that the initial tensile modulus of nylon is low, especially at high temperatures (usually at 150°C and above), which may cause deterioration of the rolling performance of the tire, especially at high temperatures
In addition, the heat shrinkage of nylon is relatively high, which can make it difficult to satisfactorily size the tire casing during the various steps of manufacture and subsequent curing.
[0007] Finally, the known large difference in tensile modulus between the two types of materials, aramid and nylon, results in a particularly high ratio of final modulus / initial modulus (admittedly sometimes targeted), which is particularly important as The use of crown reinforcements for tires, but may also be harmful in some cases, especially certain uses as carcass reinforcements
Method used
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[0050] This tire 1 of the invention has for example the main feature that at least the hooped ply and / or the carcass reinforcement ( 7 ) of its belt ( 6 ) comprise the textile cords according to the invention. According to another possible exemplary embodiment of the invention, for example bead wires ( 5 ) may consist wholly or partly of textile cords according to the invention.
[0051] The rubber compositions used for these plies are conventional compositions for pressing textile reinforcements, generally based on natural rubber, carbon black, vulcanization systems and standard additives. The bond between the composite textile cord of the invention and the rubber layer coating the cord is provided, for example, by a standard adhesive of the RFL type.
[0052] figure 2 The force-elongation curves recorded on the composite textile cords, indicated by C1 , C2 and C3 , can be used in the rubberized state in the examples of tires described above, according to or not according t...
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Abstract
The present invention relates to an aramid / polyketone composite textile cord comprising at least one aramid multifilament strand and at least one polyketone multifilament strand twisted together, the aramid multifilament strand The component monofilaments of the strands are twisted according to the twisting factor K1, and the component monofilaments of the polyketone multifilament strand are twisted according to the twisting factor K2, and it is characterized in that, in the cord: aramid / polyketone weight The ratio is greater than 1.5; the K2 / K1 ratio is greater than 1.10. This textile cord can advantageously be used as a reinforcement in a tyre, in particular a belt or carcass reinforcement of said tyre.
Description
technical field [0001] The present invention relates to textile reinforcements that can be used in particular for reinforcing rubber articles such as tyres, in particular for reinforcing the crown reinforcement or carcass reinforcement of such tyres. [0002] More particularly to composite or hybrid types of textile plied yarns or cords, sometimes referred to as "dual-mode" materials, consisting of textile materials having tensile moduli and materials of a more general Mechanical behavior. Background technique [0003] Hybrid textile plied yarns or cords of two different textile materials are known; they have long been used to improve certain performance properties, in particular to improve the compromise between mechanical, thermal and fatigue strength. [0004] Up to now, the most widely used reinforced tires are aramid-nylon hybrid cords, which include aramid strands and nylon strands, especially two strands (aramid / nylon) or even Contains three strands (aramid / aramid / n...
Claims
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IPC IPC(8): D02G3/48
CPCD02G3/48D10B2331/021D02G3/04B60C9/005
Inventor C·勒克莱尔
Owner MICHELIN & CO (CIE GEN DES ESTAB MICHELIN)