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Annealing process for aluminum foil

An annealing process and aluminum foil technology, applied in the field of single/double zero foil annealing production process, can solve the problems of increasing the investment cost and operating cost of the drying room, shorten the annealing time, reduce the probability of hot drum, and eliminate the compressive stress. Effect

Active Publication Date: 2014-03-12
SNTO TECH GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Patent No. CN200810234535.X discloses a double-zero aluminum foil product annealing prevention method, which has a certain effect on shortening the temperature rise and fall time in the annealing furnace, but the aluminum coil after annealing using this method still has a hot drum, And it increases the investment cost and operating cost of the drying room. At the same time, the total annealing time of annealing has not been reduced, and there is still a certain increase. Therefore, this method has not been widely promoted.

Method used

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Examples

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Comparison scheme
Effect test

Embodiment 1

[0014] An aluminum foil annealing process, including three stages of heating, holding, and cooling. In the heating stage, the heating rate is 2°C / hour. In the holding stage, the holding temperature is 180°C, and the holding time is 140 hours. In the cooling stage, the cooling rate is 0.5°C / hour.

Embodiment 2

[0016] An aluminum foil annealing process, including three stages of heating, holding, and cooling. In the heating stage, the heating rate is 3°C / hour. In the holding stage, the holding temperature is 183°C, and the holding time is 130 hours. In the cooling stage, the cooling rate is 1°C / hour.

Embodiment 3

[0018] An aluminum foil annealing process, including three stages of heating, holding, and cooling. In the heating stage, the heating rate is 4°C / hour. In the holding stage, the holding temperature is 186°C, and the holding time is 120 hours. In the cooling stage, the cooling rate is 2°C / hour.

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Abstract

The invention relates to an annealing process for single / double zero foil, in particular to an annealing process for single / double zero foil of over 700 millimeters. In the technical scheme, the annealing process for aluminum foil comprises the following steps of: heating at a speed of 2 to 12 DEG C / hour; keeping the temperature of between 180 and 210 DEG C for 50 to 140 hours; and cooling at a speed of 0.5 to 12 DEG C / hour. The annealing process has the advantages that: pressure stress is eliminated by controlling the heating speed and adjusting heat-insulating temperature and heat-insulating time to reduce the probability of bulging; and the annealing time is shortened on the premise of reducing the bulging to ensure the tensile strength of the aluminum foil. According to the annealing process, by controlling the cooling speed of different sections, the bulging is controlled due to the low-speed cooling of a high-temperature section, and the production efficiency is improved due to the high-speed cooling of a low-temperature section.

Description

technical field [0001] The invention relates to the annealing production process of single / double zero foils, in particular to the annealing production process of single / double zero foils of more than 700mm. Background technique [0002] Aluminum foil, especially single and double zero aluminum foil, is widely used in packaging materials for food, beverages, cigarettes, medicines, household daily necessities, etc. Especially after aluminum foil is compounded with plastic and paper, the shielding property of aluminum foil is integrated with the strength of paper and the heat sealing property of plastic, which further improves the shielding performance against water vapor, air, ultraviolet rays and bacteria, etc. necessary for packaging materials. . Therefore, aluminum foil for these purposes generally requires the following properties: 1. Have a clean and bright surface; 2. Have a certain tensile strength to improve the composite efficiency of aluminum foil and plastic and p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22F1/04
Inventor 杨益杨军高明杰
Owner SNTO TECH GRP
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