Introduction to polyester cord fabric
Introduction to polyester cord fabric
Cord fabric is the skeleton material of the tire casing. Its weight accounts for about 10% to 15% of the total weight of the tire casing. Its cost accounts for about 37% of the tire production cost. It is one of the main raw materials for tire production. At present, tire cord fabrics mainly include nylon cord fabric, polyester cord fabric, viscose cord fabric and steel cord fabric. As the tire radialization rate continues to increase, the general trend is that the demand for polyester industrial yarn continues to increase, and the output of polyester industrial yarn continues to increase.
Polyester cord fabric: also called polyester dipped cord fabric for tires. It is a frame fabric for tires woven using strong strands as the warp and medium and fine single yarns as the weft. The warp threads are tightly arranged and the weft threads are sparsely arranged, making it look like a curtain, hence the name. Cord fabric is used as the skeleton of rubber products such as tires, allowing them to withstand huge pressure, impact loads and strong vibrations. Cord fabric is an important material that affects tire performance and life. The warp threads (also called cord threads) bear the load, and the weft threads fix the warp threads.
The rubber-impregnated cord fabric for tires exists in the carcass (CARCASS) part of the tire: the single-layer or multi-layer rubber-coated cord part that constitutes the tire frame is required to have good impact resistance and flex resistance (with cord fabric); Bead (BEAD) part: The part where the carcass cord is wound around and combined with the rim. It is composed of bead wire and rubber (with cord fabric)
Cord fabric is only used on semi-steel radial tires and cannot be used on all-steel and bias tires.
The requirements for cords are: ① High strength and initial modulus; ② Heat resistance; ③ Fatigue resistance; ④ Stable structure; ⑤ Ability to bond with rubber. Therefore, polyester cord fabric must use HMLS (high modulus, low shrinkage industrial yarn), and its main process is the production and dipping of HMLS, both of which directly affect the performance of the product.
High modulus, low shrinkage polyester industrial yarn (HMLS) is a new type of polyester industrial yarn, which has good properties such as good dimensional stability, high strength, and low dry heat shrinkage. Polyester high modulus low shrinkage (HMLS) industrial yarn is a new technology and new product developed on the basis of conventional polyester high-strength yarn in the past 10 years. Its main features are high strength, high mold, small elongation and deformation, and dimensional stability. Good, low thermal shrinkage and hysteresis loss, high strength retention rate, mainly used in the manufacture of single-layer radial tire cord fabric car tires (an ideal skeleton material for radial tires) and other rubber skeleton materials and special industries Supplies, the tires made of it have the advantages of light weight, fuel economy and high speed.
The production process is as follows:
Production of low viscosity chips (CP factory) – Production of thickened chips (SSP factory) – Spinning factory (HMLS) – Weaving factory T/W/D (twisting-textile-DIPPING) – Finished product
The performance of polyester cord fabric is determined by the performance of HMLS and dipping solution. vWgXHlFjDh
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