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Cord impregnation tester


The cord impregnation tester simulates the manufacture conditions of cord impregnation. It is a high-precision test equipment that can reflect the impregnation technology parameters and monitor changes in cord properties, and therefore represents an important approach to studying the processing procedures of cord reinforcing materials. The cord impregnation tester can be used for studying the manufacturing of various kinds of cords, cord modifications, adhesiveness of the impregnated cords, quality assessment of raw materials used in cord impregnation, and application of new impregnation additives.

The cord impregnation tester is suitable for single cord (including thread)made of nylon, polyester, aramid, rayon and other natural or synthetic materials.

The impregnation procedure is as follows:

First impregnationdryingheat tractionsecond impregnationdryingheat traction and heat stereotypingcoiling


The cord impregnation tester has overall 2 main parts: the left part is dedicated to operations whereas the right part is the heating zone. The tester incorporates the brand-new horizontal oven structure, which is superior than its vertical-structured counterparts currently used by most other domestic devices in terms of 1)the temperature homogeneity of the heat-drying zone; and  2) general performance. The entire device is less than 2.5 in height, and therefore is suitable for general laboratories.

The cord impregnation tester uses double roller sets, and the cord is simply wrapped around the 2 rollers repeatedly. Within each roller set, the 2 rollers synchronize with each other well; therefore, the tension generated between each roller is well controlled.

In the cord impregnation tester, all the reentry roller and bearing platforms are located on the outside of the heat over. This makes it convenient for operation, lubrication, anti-sticking and cleansing, and can avoid damage to the cord during testing due to overheat or inadequate lubrication.

In the cord impregnation tester the entire testing process is controlled by computer. As shown in the following figure, the operation interface of the tester includes operation buttons, the testing flow chart, and the set values and actual values of all parameters displayed in real time.

Main functions:

The cord impregnation tester is of complete design to make the needs of the “double impregnation” technology. It can simulate various manufacturing conditions of fiber cords impregnation (including single bath and double bath), and can be used for studying the impact of different impregnating formulations and parameters on the properties of the impregnated cords.

The cord impregnation tester uses the PLC+ computerized model. The testing parameters can be remote-set and the testing process is automatically controlled. Users can record the temperature, tension value and line-moving speed of each drying section and traction/stereotyping section in real time. The testing measurements is displayed and controllable in real time, and can be saved into the database for future references.

Technical parameters:


①The main purpose of the drying section is to extract moisture from the impregnated cords, so that the impregnated rubber film will be dry. The temperature is usually maintained at 120℃~170℃±2℃ (note: different temperature will be required for different fiber/size)

②The purpose of the heat traction and heat stereotyping is to solidify the impregnated rubber film under high temperature, and form heat-solid impregnated rubber film. At the same time, the cords will be stretched and stereotyped due to the tension generated, and therefore the physical properties of the fibers are improved. Usually the temperature is maintained at 180℃~250℃±2℃(note: different temperature will be required for different fiber/size)


The tension range established when the cords are running is from 0.5 kg to 6 kg, with error less than 2%.

Power supply:

The working power of the cord impregnation tester is 220V, 50Hz; the fluctuation range of the voltage should be kept within rated value±10%.