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Cable aluminum foil performance testing

Date: 2019-08-14 15:14

Aluminum foil can be used to wrap communication cables. In the production process, it is often scrapped due to poor surface quality, mechanical properties, or voids in the foil strip, resulting in great economic losses. The tensile testing machine plays an important role in controlling the mechanical properties of cable aluminum foil.

The cable aluminum foil testing process:

The cable aluminum foil testing process is made by attaching a special plastic film (0.058 mm thick) to the upper and lower surfaces of 0.15-0.20 mm thick aluminum foil. There are two methods of sticking: dry sticking and wet sticking. The dry method uses a high temperature (200 ° C) roll method to stick the film; the wet method is glue bonding. Most of the current methods use dry methods. After attaching the plastic film, the film is peeled off from the cable foil by a tensile machine to determine the degree of bonding of the plastic film. This measurement data is very important, and is called peel strength. According to the communication cable industry standard (code YD/T 723.2-94), the strength should not be less than 6.13 N/cm; in addition, the heat sealing strength should not be less than 17.5 N/cm. The surface quality of cable aluminum foil is the most important factor affecting the peel strength. The main surface quality problems are oil spots, corrosion, and peroxide.


the mechanical properties of the cable aluminum foil:

According to the communication cable industry standard, the mechanical properties of the cable aluminum foil are: 0.1, 0.15, 0.20 mm thick cable foil strength is not less than 54 MPa, elongation is not less than 15%. It can be seen that it is not difficult to meet the above indicators, but most customers require the cable aluminum foil to have Rm ≥ 70 MPa or more than 80 MPa; the elongation requirement is: 0.20 mm thick, A ≥ 20%; 0.15 mm A ≥ 18%. This is mainly to prevent breakage when the film is coated, especially when wound on a cable. Because the plastic film is cut into several strips, the narrowest is 12mm. There may be slight cracks or burrs when cutting. When using, it should be wrapped with tension. If there is a slight defect, it will break due to stress concentration. . A cable is usually 2km or 3km long, and it is very dangerous to entangle an unexpected break on a high-speed machine, and it will cause great economic loss. Therefore, measures must be taken to improve the mechanical properties of aluminum foil to meet customer requirements.

cable aluminum foil

Cable aluminum foil mechanical properties test samples failed to pass the test can not correctly reflect the performance of aluminum foil, often the performance of customer review and the manufacturer's test is very different. Therefore, it is necessary to perform performance testing on cable foil. The cable aluminum foil produced by Mingtai Aluminum is mainly 1235 aluminum foil or 8011 aluminum foil. The tensile strength of the product is large and the shielding effect is outstanding, which can meet the requirements of cable wrapping.

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