Macro-molecular leakage-free self-adhering aluminum foil and manufacturing method thereof

Abstract

A macro-molecular leakage-free self-adhering aluminum foil has two layers of aluminum foil compounded using a PET film, and the other surfaces of each layer coated with a modified PE adhesive layer respectively; or air gaps in one surface or two surfaces are filled with nano-aluminum to form a permeable air gap-free surface. The foil has advantages: 1, high folding resistance, fatigue resistance and strength 2, wrapping self-adhering performance is good, and stripping strength formed after adhesion is several times as high as that of the prior art; 3, air gaps in the surface of the aluminum foil filled with nano-aluminum powder result in improved compactness; manufacture from low-grade aluminum foil, and so that rolling precision requirements are lowered, and manufacturing cost reduced; 4, insulating strength is high, shielding effect is good, the return loss phenomenon is avoided, and tensile strength is good.

1 . A macro-molecular leakage-free self-adhering aluminum foil, wherein air gaps in one surface or two surfaces of a first layer of aluminum foil or a second layer of aluminum foil are filled with nano-aluminum powder to form a permeable air gap-free surface, one surface of the first layer of aluminum foil and one surface of the second layer of aluminum foil are compounded with a PET film using an adhesive, and the other surface of the first layer of aluminum foil and the other surface of the second layer of aluminum foil are coated with a modified PE adhesive layer respectively. 
     
     
         2 . The macro-molecular leakage-free self-adhering aluminum foil, wherein air gaps in one surface or two surfaces of the aluminum foil are filled with nano-aluminum to form a permeable air gap-free surface, the PET film is compounded with one surface of the aluminum foil using an adhesive, and the other surface of the aluminum foil is coated with a modified PE adhesive layer. 
     
     
         3 . The macro-molecular leakage-free self-adhering aluminum foil according to  claim 1 , wherein the air gaps refer to micropores and gaps. 
     
     
         4 . A preparation method for a macro-molecular leakage-free self-adhering aluminum foil, comprising the following steps: 1) filling one surface or two surfaces of each of a first layer of aluminum foil and a second layer of aluminum foil with nano-aluminum powder with the same attribute, such that no permeable air gaps are present in the surface of the aluminum foil; 2) then, placing a PET film between the first layer of aluminum foil and the second layer of aluminum foil, and compounding into a whole by adhering with an adhesive; 3) coating a non-compounded surface of each of the first layer of aluminum foil and the second layer of aluminum foil with a modified PE adhesive, and drying to obtain a modified PET film; or 1) filling one surface or two surfaces of the aluminum foil with nano-aluminum with the same attribute, such that no permeable air gaps are present in the surface of the aluminum foil; 2) then, compounding a PET film to one surface of the aluminum foil using an adhesive; 3) coating a non-compounded surface of the aluminum foil with a modified PE adhesive, and drying to obtain a modified PET film. 
     
     
         5 . An air gap filling production line for a macro-molecular leakage-free self-adhering aluminum foil, comprising a PLC controller, wherein an aluminum foil air gap detection device, a nano-aluminum powder spraying device and a nano-aluminum powder rolling forming device are sequentially provided between an aluminum foil unreeling roll and an aluminum foil reeling roll; a photoelectric signal output end of the aluminum foil air gap detection device is connected to a signal input end of the PLC controller, one of signal output ends of the PLC controller is connected to a signal input end of the nano-aluminum powder spraying device, and the other signal output end of the PLC controller is connected to a signal input end of a servo motor; the servo motor drives the transmission of the aluminum foil reeling roll. 
     
     
         6 . The air gap filling production line for the macro-molecular leakage-free self-adhering aluminum foil according to  claim 5 , wherein the aluminum foil air gap detection device is composed of a dark box, a light-emitting source and a photosensitive sensor; the dark box is provided with an aluminum foil inlet and an aluminum foil outlet; the light-emitting source is located at the lower part inside the dark box and also located below the aluminum foil; the photosensitive sensor is located at the upper part inside the dark box, and a signal output end of the photosensitive sensor is connected to the signal input end of the PLC controller. 
     
     
         7 . The air gap filling production line for the macro-molecular leakage-free self-adhering aluminum foil according to  claim 5 , wherein the nano-aluminum powder spraying device is composed of a nano-aluminum powder storage box, a nano-aluminum powder spraying nozzle and a nano spraying enclosed box; the nano spraying enclosed box is provided with an aluminum foil inlet and an aluminum foil outlet; the nano-aluminum powder spraying nozzle rightly faces the surface of the aluminum foil, and whether the nano-aluminum powder spraying nozzle works is controlled by the PLC controller. 
     
     
         8 . The air gap filling production line for the macro-molecular leakage-free double-foil self-adhering aluminum foil according to  claim 5 , wherein the nano-aluminum powder rolling forming device is composed of an enclosed box, a double-roll rolling roll and a surface cleaning brush; the double-roll rolling roll is distributed at an aluminum foil inlet portion inside the enclosed box and is driven by a servo motor to rotate; whether the servo motor works is controlled by the PLC controller; the surface cleaning brush is distributed at an outlet of the double-roll rolling roll. 
     
     
         9 . The air gap filling production line for the macro-molecular leakage-free double-foil self-adhering aluminum foil according to  claim 8 , wherein a clearance between two rolls in the double-roll rolling roll is adjustable; a brush head of the surface cleaning brush is a brush head, or a pile-beaded brush bead, or a cloth brush head. 
     
     
         10 . A filling method for an air gap filling production line for a macro-molecular leakage-free self-adhering aluminum foil, wherein during working, the PLC controller instructs the servo motor to drive the aluminum foil reeling roll and the double-roll rolling roll in the nano-aluminum powder rolling forming device to rotate; a detected aluminum foil enters the dark box of the aluminum foil air gap detection device from the aluminum foil unreeling roll under the traction of the aluminum foil reeling roll; when the surface of the detected aluminum foil is previous to light, the photosensitive sensor located in the dark box is triggered to transmit a location signal of an air gap in the detected aluminum foil to the PLC controller; at the instant when the aluminum foil having air gaps passes through the nano-aluminum powder spraying nozzle in the nano-aluminum powder spraying nozzle, the PLC controller instructs the nano-aluminum powder spraying nozzle in the nano-aluminum powder spraying device to spray nano-aluminum powder to air gap portions on the surface of the aluminum foil; when the aluminum foil to which nano-aluminum powder is sprayed passes through the double-roll rolling roll in the nano-aluminum powder rolling forming device, the nano aluminum powder is compacted by the double-roll rolling roll, excessive nano-aluminum powder on the surface of the aluminum foil is removed by the surface cleaning brush, and finally the aluminum foil is reeled by the aluminum foil reeling roll. 
     
     
         11 . An aluminum foil air gap repair production line, wherein an electrostatic friction generator, a nano coating device and a nano-aluminum powder rolling forming device are sequentially provided between the aluminum foil unreeling roll and the aluminum foil reeling roll; each of the electrostatic friction generator, the nano coating device and the nano-aluminum powder rolling forming device is provided with an inlet and an outlet allowing the aluminum foil to enter and exit; after the aluminum foil is discharged from the aluminum foil reeling roll, the aluminum foil sequentially passes through the electrostatic friction generator, the nano coating device and the nano-aluminum powder grinding forming device, and the repaired aluminum foil is reeled by the aluminum foil reeling roll which is driven by a speed reduction motor to rotate. 
     
     
         12 . The aluminum foil air gap repair production line according to  claim 11 , wherein the electrostatic friction generator is composed of a box body, upper and lower pile-pads, and a screw rod adjusting mechanism; the box body is provided with an aluminum foil inlet and an aluminum foil outlet; the upper and lower pile-pads are located in the box body and are connected with the screw rod and adjusting mechanism respectively via respective pile-pad fixing plate; a screw rod in the screw rod adjusting mechanism is in spinning fit to a screw thread in an upper end plate of the box body and used to adjust the contact force between the upper and lower pile-pads. 
     
     
         13 . The aluminum foil air gap repair production line according to  claim 11 , wherein a nano-aluminum powder coating cavity is located in the middle of the nano coating device and provided with an aluminum foil inlet and an aluminum foil outlet; a piston and a cylinder cavity are respectively located at the upper part and the lower part of the nano-aluminum powder coating cavity, the cylinder cavity is provided with an air inlet. 
     
     
         14 . The aluminum foil air gap repair production line according to  claim 12 , wherein the nano-aluminum powder rolling forming device is composed of an enclosed box, a double-roll rolling roll and a surface cleaning brush; the double-roll rolling roll is distributed at an aluminum foil inlet portion inside the enclosed box and is driven by a servo motor to rotate; the surface leaking brush is distributed at an outlet of the double-roll rolling roll. 
     
     
         15 . The aluminum foil air gap repair production line according to  claim 14 , wherein a clearance between two rolls in the double-roll rolling roll is adjustable; a brush head of the surface cleaning brush is a brush head, or a pile-headed brush head, or a cloth brush head. 
     
     
         16 . A filling method for the aluminum foil air gap repair production line, wherein during working, a switch of the motor is started, the motor drives the aluminum foil reeling roll and the double-roll rolling roll in the nano-aluminum powder rolling forming device to rotate, and the aluminum foil enters the electrostatic friction generator from the aluminum foil unreeling roll under the traction of the aluminum foil reeling roll and is subject to forceful friction by the upper and lower pile pads in the electrostatic friction generator, such that the surface of the aluminum foil generates static; when the aluminum foil whose surface has static passes through the nano coating device, nano-aluminum powder in the nano coating device is adhered to the surface of the aluminum foil, and by means of the rolling of the double-roll rolling roll in the nano-aluminum powder rolling forming device, the nano-aluminum powder is then compacted by the double-roll rolling roll to well repair air gaps in the surface of the aluminum foil; excessive nano-aluminum powder on the surface of the aluminum foil is removed by the surface cleaning brush, and finally the aluminum foil is reeled by the aluminum foil reeling roll. 
     
     
         17 . The macro-molecular leakage-free self-adhering aluminum foil according to  claim 2 , wherein the air gaps refer to micropores and gaps.