The role of the tire cord fabric layer is to withstand the tire pressure when the automobile tire is inflated, so as to achieve the role of preventing the tire from being inflated in the internal tube and protecting the mechanical parts in the tube from damage, while the cord fabric layer also has the role of transmitting traction and braking force.

A multi-ply high strength automobile tire cord fabric and its preparation method and process Document Serial No.: 14462385 Read: 1891 Source: State Intellectual Property Office Navigation: X Technology>Latest Patents>Manufacture of other products and their application technology [Technical Field] The present invention relates to the technical field of cord fabric, and in particular relates to a multi-ply high strength automobile tire cord fabric and its preparation method.

BACKGROUND TECHNOLOGY: Cord fabric is the skeleton material of tire outer tire, and its weight accounts for about 10%~15% of the total weight of the outer tire, and its cost accounts for about 37% of the cost of tire production, which is one of the main raw materials for tire production. At present, the tire cord fabric is mainly nylon cord fabric, polyester cord fabric, viscose cord fabric and steel cord fabric. Cord fabric, is a strong strand for the warp, with medium and fine count single yarn for the weft, woven tire with the skeleton fabric. The warp threads are arranged closely, the weft yarns are arranged sparsely, like a curtain, so the name of the cord fabric, the warp threads, also known as the cord, to bear the load, the weft yarns to fix the position of the warp threads. Cord fabric is used as the skeleton of rubber products such as tires to withstand great pressure, shock loads and strong vibration. Cord fabric is an important material that affects the performance and life of tires. Most of the current cord fabrics have a single-layer structure. In order to improve the structural strength of the cord fabric, it is necessary to propose a multi-layer high-strength automobile tire cord fabric and a method for its preparation.

Technical realization elements: the present invention aims to overcome the abovementioned deficiencies of the prior art, and provide a multi-layer high-strength automobile tire cord fabric and its preparation method, which aims to solve the technical problem of the prior art that the structural strength of the automobile tire cord fabric is low.

In order to achieve the above purpose, the present invention proposes a multi-layer high-strength automobile tire cord fabric, which is a three-layer structure comprising an inner layer, an intermediate layer and an outer layer, said inner layer, the intermediate layer and the outer layer being sequentially bonded together, said intermediate layer being made of high-strength steel wire twisted into strands as a warp, and elastic polyester threads as a weft, and said inner layer and the outer layer being made of composite fiber threads as a warp, and coated fiber yarns twisted into a core, and said inner layer and outer layer being made of composite fiber threads as a warp, and coated fiber yarns twisted into a weft. Said inner and outer layers are both woven with composite fiber threads as warp threads and wrapped fiber threads as weft threads.

Said intermediate layer is bonded to the inner and outer layers by means of a bonding layer which passes through and covers the intermediate layer.

Said inner layer has a warp density of 90~100 roots/10cm and a weft density of 5~7 roots/10cm, and said intermediate layer and outer layer both have a warp density of 85~90 roots/10cm and a weft density of 4~6 roots/10cm, and the weft threads on the inner layer, the intermediate layer, and the outer layer are interlaced.

Said warp threads at the central position on the inner layer, the middle layer and the outer layer are denser than the warp threads at the fabric edge, and said weft threads on the inner layer, the middle layer and the outer layer are equally spaced.

Each of the weft threads in said middle layer is made of two strands of elastic polyester threads alternately interwoven, and two strands of elastic polyester threads are provided with high-strength steel wires in the adjacent interwoven points.

Said composite fiber yarn is made of a plurality of carbon fiber yarns and basalt fiber yarns by twisting, and said core yarn is made of polyester filament yarn as the core yarn, which is composited with an outer basalt fiber layer.

The present invention also proposes a method of preparing a multi-layer high-strength automobile tire cord fabric, which is produced by using a cord fabric production equipment, said cord fabric production equipment comprising a first unwinding roll, a second unwinding roll, a third unwinding roll, a soaking pool, a compounding roll, a drying box and a winding roll, and comprising the following steps: first step: a plurality of high-strength steel wires are used to twist into a strand as a warp wire for the intermediate layer, and a plurality of flexible polyester yarn twisted into an elastic polyester thread as the weft thread of the intermediate layer; the use of composite fiber yarn as the warp thread of the inner and outer layers, and the use of core yarn twisted and formed into strands as the weft thread of the inner and outer layers, and standby; the second step, the use of high-strength steel wires and elastic polyester threads woven into the intermediate layer, the use of composite fiber threads and core yarns woven into the inner and outer layers, and winding on a warp knitting machine; the third step, the winding of the The third step is to install the middle layer, inner layer and outer layer after winding on the first unwinding roller, the second unwinding roller and the third unwinding roller respectively, and the middle layer will be soaked in glue through the soaking pool by hauling, and then compounded with the inner layer at the bottom of the unwinding and the outer layer at the top of the unwinding through the composite roller to form the cord fabric blanks, and then enter into the drying box to dry and set the shape, and then finally wound up through the unwinding rollers.