Methods are described for treatment of aramid fibers to modify the surface of the fibers. The treated fibers have improved adhesion to elastomer materials as compared to untreated fibers. Modification methods include irradiating the fibers, compressing and straining the fibers under a constant pull force and immersing the fibers in a coupling agent fluid. The treated fibers can be used with elastomers and provide reinforcement elements in products such as tires.

A shear band comprising a three-dimensional spacer structure, wherein the three-dimensional spacer structure is formed from a first and second layer of material, each layer of material having first reinforcement members which extend in a first and direction, and second reinforcement members which extend in a second direction, wherein each layer of material is connected to each other by a plurality of connecting reinforcement members which extend in a third direction, wherein the shear band further comprises a first membrane layer located radially outward of the three-dimensional spacer structure. The invention further comprises a non-pneumatic tire which includes the above described shear band.

A tire having a rubber body in which a steel cord is embedded, wherein a layer composed of Zn.sub.xCo.sub.yO is formed at the interface between the steel cord and the rubber body and x+y is 5/6 or more and 1 or less.

The invention relates to a metallic reinforcing cord (10) for tyres for vehicle wheels, comprising a single metallic wire (11) extending along a substantially helical path to form a helix having a predetermined pitch (Pw) and, in at least some cross sections thereof, an inner diameter (Di) greater than, or equal to, 0.7 mm.

According to the present disclosure, there is disclosed a hybrid tire cord capable of realizing high performance and weight reduction of a tire by having strong adhesion to rubber and excellent fatigue resistance as well as high tenacity and high modulus by providing a cabled yarn in which an aramid hybrid Z-twisted yarn, composed of an aramid multifilament yarn and an aramid spun yarn, and a general-purpose Z-twisted yarn are S-twisted together. There is also provided a method for manufacturing the same.

The present application relates to a hybrid cord including a bio-based nylon primarily twisted yarn. According to the present application, while including a primarily twisted yarn including bio-based nylon having a higher modulus compared to chemical-based nylon, there is provided a hybrid cord and has elongation and fatigue resistance equivalent to or higher than commercially required levels (i.e., the level that the cord including a conventional chemical-based nylon primarily twisted yarn has).

The invention relates to a weft fabric (T) for tyres (10) comprising several textile warp reinforcing elements (44) and several weft reinforcing elements (50), wherein the moisture regain MR of the weft reinforcing elements (50) is less than or equal to 2.0%, the moisture regain being determined according to standard ASTM D 885/D 885MA of January 2010; the weft reinforcing elements (50) interweave the warp reinforcing elements (44) and; the weft reinforcing elements (50) are hairy.

A dipped and heat-set aramid cord, comprising a plurality of cord plies having a spacing between the plurality of cord plies, wherein a TASE at 2.0% elongation of the aramid cord is less than 2.0 cN/dtex; wherein the spacing between the plurality of cord plies is more than 10% and less than 80% of a cord diameter (D) of the cord plies.

In a pneumatic tire, a carcass layer mounted between bead portions includes composite cords made of polyethylene terephthalate fiber yarn having a fineness from 420-1200 dtex and an aromatic polyamide fiber yarn having a fineness from 520-1200 dtex, and a total fineness from 940-2400 dtex, and a twist coefficient from 1600 to 2400, the composite cords having an intermediate elongation from 2.0% to 4.5% with a load of 2.0 cN, having a dimensional stability index from 2.5% to 6.0% which is a sum of a dry heat shrinkage rate at 150 C. and the intermediate elongation with the load of 2.0 cN, and having a ratio of an initial elastic modulus at 100 C. within a load range from 0 N to 44 N with respect to an initial elastic modulus at 25 C. within a load range from 0 N to 44 N, the ratio being from 76% to 94%.

Yarns are formed of a copolyamide in an amount of at least 90 wt % with respect to the total weight of the yarn, wherein copolyamide includes (a) at least 95 wt % by weight with respect to the total weight of copolyamide, monomeric units derived from hexamethylene diamine and adipic acid and (b1) cyclic monomeric units derived from a diamine X, and cyclic monomeric units derived from a diacid Y, and/or b2) cyclic monomeric units derived from an amino acid Z. The summed amount of monomeric units derived from X, Y and Z is between 0.1 to 4.5 wt % by weight with respect to the total weight of the copolyamide. The yarns have a tensile strength of at least 80 cN/tex as measured according to ASTM D885-04.