What is the use of polyester industrial yarn?

High-strength and low-elongation products, as well as some low-shrinkage products, are mainly used for tire cord, mining conveyor belt, drive triangle belt, safety belt, lifting belt, PVC-coated fabric, fire hose, rubber hose, etc. 2. Main use of existing products The original intention of the development of polyester industrial filament is to use polyester to replace rayon, nylon 6, nylon 66, etc. as the reinforcing skeleton material of rubber products. These products include radial tire cord fabric, rubber conveyor belt cord fabric, triangle belt, transmission belt cord, rubber hose cord and cord fabric, etc.

2.1 Ordinary radial tire cord fabric standard type (ordinary type) polyester industrial filament, also known as high-strength low-elongation series. Its important characteristics are high strength, low elongation and high thermal shrinkage. Typical varieties and specifications.

The cord fabric woven from this kind of industrial silk has the characteristics of high strength and low elongation under constant load, but the dry heat shrinkage is high. Therefore, when using this kind of cord fabric for tire making, the concave phenomenon of the cord fabric joint is obvious. The specification elongation, dry heat shrinkage and constant load elongation of vulcanized Jinshan oil chemical fiber must be inflated and shaped after that, and can only be vulcanized at normal temperature. The curing time is long, the scrap rate is high, the production efficiency is low, and the grade of the tire made is low, which cannot meet the requirements of high-performance radial tire.

2. 2 Conveyor belt, conveyor belt and rubber hose 2 2.1 Conveyor belt The conveyor belt with polyester industrial yarn as the main skeleton material has the advantages of high strength, thin belt body, good flexibility and grooving. The manufacturing of conveyor belt is divided into two categories: one is rubber conveyor belt and the other is whole core belt. The type and specification of polyester industrial yarn used can be seen in the rubber conveyor belt. The high strength and low elongation industrial yarn is used as warp yarn, and nylon 66 or nylon 6 is used as weft yarn. It is woven into polyester and nylon canvas, and then subjected to two-bath dipping treatment. After rubber calendering and vulcanization heat treatment, it finally becomes a rubber conveyor belt.

Variety, specification, elongation, dry heat shrinkage, constant load elongation, PVC whole core belt is made of high-strength and low-elongation industrial silk and cotton blended as warp yarn, low-shrinkage industrial silk and cotton blended as weft yarn, woven into the whole core belt, and then PVC-impregnated, and then plasticized into the outer layer to form the final PVC whole core belt.

Due to the following advantages of polyester in use performance: 1) Good moisture resistance, it can maintain its strength after being damped, and is suitable for use in wet mines.

2) The modulus is high. When designing the conveyor belt, the safety factor can be lower than that of nylon.

3) The constant load elongation is small, the dimensional stability is good, and the belt tension stroke is small, which saves the trouble of readjustment due to stretching deformation.

4) With high impact strength, the tape has good strength and impact fatigue resistance.

Therefore, in recent years, in the field of conveyor belt, the consumption of polyester industrial yarn has increased greatly, especially in the field of coal mine conveyor belt, most of which use polyester industrial yarn as the belt core. Make the industry become a big consumer of polyester industrial yarn.

2. 2. 2 Rope for V-belt conveyor belt is widely used in various specifications of V-belt conveyor belt due to the higher strength and initial modulus of the rope made of polyester industrial yarn after initial twisting, re-twisting and dipping treatment than rayon, and good bending fatigue performance. In developed countries, the framework of the triangular conveyor belt has long been polyester. In recent years, due to the increase of domestic production of polyester industrial yarn and the improvement of polyester dipping process, the market of polyester cord has developed rapidly.

2. 2. 3. The reinforcing materials used in the rubber hose industry in China before are cotton variety, specification elongation, dry heat shrinkage, constant load elongation, Jinshan oil chemical fiber cloth, and vinylon cotton blended fabric. The production of traditional sandwich rubber hose is mainly. With the development of rubber production, woven tubes and winding tubes have gradually eliminated cloth clamping tubes. The wire rope made of polyester industrial yarn after twisting, shaping (or dipping) is the most ideal skeleton material for producing braided hose and winding hose. Polyester cord not only has high strength, good dimensional stability, but also has good chemical stability. Unlike vinylon yarn as the rubber hose skeleton, it will produce resinification when it meets with water, affecting the service life of the rubber hose.

For typical industrial silk varieties and specifications used for common rubber hose rope, see varieties, specifications, elongation, dry heat shrinkage, constant load elongation, 2 3 The high strength and wear-resistant industrial silk series products of automobile safety belt after technical improvement on the original high strength and low elongation industrial silk varieties, instead of imported industrial silk, are used as the special wire for automobile safety belt. The automobile safety belt produced by the series is scratch resistant, wear-resistant, firm and durable. See Table Variety, Specification, Elongation, Dry Heat Shrinkage and Constant Load Elongation for the variety and specification of vehicle safety belt. This variety is also widely used for lifting belts.