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Cable foil is made of aluminum foil with the sealing and shielding. After one or both sides are coated with plastic film, the aluminum plastic composite foil is used as a cable shield. Cable foil requires less oil on the surface, no holes, and has higher mechanical properties. The overall quality is not high, but the length is extremely strict.
The cable foil uses the sealing and shielding principles of aluminum foil. Wrapped around the signal transmission wire and used as a cable shield, it can play a good signal shielding effect.
Cable foil can generally use 1235-O state aluminum foil and 8011-O state aluminum foil, 8011 alloy thickness is 0.1, mm0.15mm or 0.2mm, 1235 alloy thickness is 0.025-0.05mm, length is required , The domestic commonly used for 2050m or 3050mm export is basically more than 4000mm.Aluminum foil is usually made after continuous casting, continuous rolling, cold rolling, slitting and complete annealing, it is divided into small coils according to the length required by the user and supplied to the cable foil composite plant. The surface is covered with plastic film and divided Cut into small strips into a coil to supply cable factory
Generally speaking, the overall requirements of cable foil for the quality of aluminum foil material are not very high, as long as there is little oil on the surface and no holes. Because the surface quality of aluminum foil is the most important factor affecting the peel strength, the main surface quality problems are oil spots, corrosion, and peroxidation. However, cable foils have relatively high requirements on length and mechanical properties.
In terms of length, the length of the cable foil is only allowed to be longer but not short. This requires careful calculation when casting and rolling the billet. The casting and rolling billet should be kept at 10 times or 12 times the length required by the customer, with an additional 3% error; in terms of mechanical properties, that is, strength, The standard setting of the cable foil in the communication cable industry is not high, but most customers require the strength of the cable foil to be greater than 70MPa or 80MPa. The reason why customers consider this is mainly to prevent the film from being broken, especially when winding on the cable. Because after the plastic film is cut, it should be cut into several small strips, the narrowest of which is 12mm. There may be slight cracks or burrs during slitting. When using, it should be wound with tension, and slight defects will break due to stress concentration.
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