Aluminum air conditioner foil with breathability and preparation method thereof

An air-conditioning foil and air-permeability technology, which is applied in the field of air-permeable aluminum air-conditioning foil and its preparation, can solve the problems of inability to remove steam and water, and achieve the effects of easy coloring, uniform distribution and excellent oxidation effect.

Active Publication Date: 2016-04-06
苏州福羊自控科技有限公司
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AI-Extracted Technical Summary

Problems solved by technology

[0005] When the air conditioner is turned on in winter, because the internal mechanism of the air conditioner is heated, the external unit becomes cooling. When the heat reaches a certain temperature, the condenser of the external unit will defrost. When the machine is working, the four-way va...
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Method used

3, the present invention carries out mixed smelting with lithium titanate whisker and 6061 aluminum alloy powder, can obtain the composite material with higher specific strength, fatigue strength, wear-resisting property, adopt the method for ball milling to make whisker in aluminum alloy The powder is more evenly distributed, and the ball milling method used in the pres...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Abstract

The invention discloses an aluminum air conditioner foil with breathability and a preparation method thereof, the aluminum foil is made from lithium titanate crystal whiskers and 6061 aluminium alloy, two sides of the aluminum foil with breathability are respectively compounded with a hydrophilic film and a hydrophobic film, an air conditioner foil product obtained through the material and the method has tensile strength being up to 160 to 180Mpa, and ductility being greater than 18 percent. Meanwhile, the air conditioner foil product has good hydrophilicity and hydrophobicity, can greatly improve heat exchange efficiency of an air conditioner, and prevent the air conditioner from frosting.

Application Domain

Technology Topic

Ductility6061 aluminium alloy +5

Examples

  • Experimental program(3)

Example Embodiment

[0032] Example 1
[0033] An air-permeable aluminum air-conditioning foil, the air-permeable aluminum air-conditioning foil is composed of an aluminum foil and a hydrophilic material and a hydrophobic material compounded on both sides of the aluminum foil;
[0034] Wherein, the surface of the aluminum foil is densely covered with pinholes, the thickness of which is 0.01mm, and the number of pinholes reaches 5000/m 2 , The diameter of the pinhole is less than 0.02mm;
[0035] Wherein, the hydrophilic material is a carboxylic acid type waterborne polyurethane film with a thickness of 0.01 mm;
[0036] Wherein, the hydrophobic material is a mixture of microporous silica gel and carbon powder, the volume ratio of the microporous silica gel to the carbon powder is 1:1.25, and the amount of the microporous silica gel is 2 g/m 2 The fineness of the microporous silica gel and carbon powder is between 1250-2500 mesh.
[0037] The method for preparing the air-permeable aluminum air-conditioning foil, wherein the aluminum foil is made of 6061 aluminum alloy, includes the following steps:
[0038] S1. Prepare an aluminum foil densely covered with pinholes on the surface, the thickness of the aluminum foil is 0.01 mm, the number of pinholes reaches 5000/m2, and the diameter of the pinholes is less than 0.02mm;
[0039] S2. The carboxylic acid type waterborne polyurethane film and the aluminum foil prepared in step S1 are laminated on one side with an adhesive, wherein the thickness of the carboxylic acid type waterborne polyurethane film is 0.01mm, and the used composite pressure is 3kg/cm3, The compounding temperature is 85°C, the pulling speed is 1m/s, and the amount of adhesive is 6g/m2;
[0040] S3. Coating the other side of the aluminum foil with an adhesive and compounding it with a mixture of microporous silica gel and carbon powder, wherein the volume ratio of the microporous silica gel to the carbon powder is 1:1.25, and the amount of the microporous silica gel 2g/m 2 , The fineness of the microporous silica gel and carbon powder is between 1250-2500 mesh, and the used composite pressure is 8kg/cm 3 , The compounding temperature is 85℃, the pulling speed is 1m/s, and the amount of adhesive is 5g/m 2.
[0041] The preparation method of the aluminum foil in the step S1 is: mixing lithium titanate whiskers and 6061 aluminum alloy powder in a mass ratio of 1:20 for ball milling, smelting the ball milled powder, and then using a continuous casting process to The metal is produced as a billet with a thickness of 8.5±0.5mm suitable for cold rolling. After two cold rolling and one foil rolling, and finally an annealing treatment, a 0.01-0.03mm thick air-permeable aluminum foil with dense pinholes on the surface is obtained.
[0042] The relative air humidity in the smelting is 45-55%.
[0043] The specific operation of the hybrid ball mill includes: the ball mill parameter is the ball-to-material ratio of 8:1, the steel balls are mixed according to the ball diameter from 10mm to 80mm, a total of eight specifications, the ball mill speed is 200r/min, and the ball mill working mode is forward rotation for 900s. Stop for 30s, then reverse for 900s, stop for 30s, and so on, the ball milling time is 4h.
[0044] The specific operation of the second cold rolling and rolling includes: performing one cold rolling under the condition that the billet temperature is less than 80°C, each pass adopts a 25% pass processing rate, after 6 passes of cold rolling, rolling to 0.5±0.05 mm thickness, the H22 state of the converter annealing furnace is used for the first intermediate annealing; the cold-rolled billet after the first intermediate annealing is subjected to the second cold rolling, each pass adopts 35% pass processing rate, and 4 passes of cold rolling It is rolled and rolled to a thickness of 0.25±0.05mm, and the second intermediate annealing is performed in the H24 state in the converter annealing furnace.
[0045] The specific operation of the foil rolling includes: passing the cold-rolled blank after the second intermediate annealing through three passes of foil rolling, each pass adopts a 45% pass processing rate, and is rolled to a thickness of 0.01 mm; The surface of the foil rolling roll is marked with regular close-packed dot matrix bumps, the diameter and depth of the pits are both less than 0.02mm, and the number of pits reaches 5000/m 2.
[0046] The specific operation of the annealing step includes: holding the aluminum foil after the foil rolling process at an annealing temperature of 350° C. for 8 hours, and then holding it at an annealing temperature of 250° C. for 10 hours.
[0047] Before the step S2, it is necessary to carry out the operation of degreasing: alkali washing through the alkali washing tank at 60°C to clean the grease on the surface of the aluminum foil prepared in step S1; wherein the pH value of the alkali solution is 11; after the alkali washing is completed, enter The water tank is washed with high-temperature water to clean the residual lye on the surface of the aluminum coil. The high-temperature water washing temperature is 50°C. After the washing is completed, the aluminum foil is dried at 180°C.

Example Embodiment

[0048] Example 2
[0049] An air-permeable aluminum air-conditioning foil, the air-permeable aluminum air-conditioning foil is composed of an aluminum foil and a hydrophilic material and a hydrophobic material compounded on both sides of the aluminum foil;
[0050] Wherein, the surface of the aluminum foil is densely covered with pinholes, the thickness of which is 0.03mm, and the number of pinholes reaches 9000/m 2 , The diameter of the pinhole is less than 0.02mm;
[0051] Wherein, the hydrophilic material is a carboxylic acid type waterborne polyurethane film with a thickness of 0.02 mm;
[0052] Wherein, the hydrophobic material is a mixture of microporous silica gel and carbon powder, the volume ratio of the microporous silica gel to the carbon powder is 1:1.25, and the amount of the microporous silica gel is 2 g/m 2 The fineness of the microporous silica gel and carbon powder is between 1250-2500 mesh.
[0053] The method for preparing the air-permeable aluminum air-conditioning foil, wherein the aluminum foil is made of 6061 aluminum alloy, includes the following steps:
[0054] S1. Prepare an aluminum foil with dense pinholes on the surface, the thickness of the aluminum foil is 0.03mm, the number of pinholes reaches 9000/m2, and the diameter of the pinholes is less than 0.02mm;
[0055] S2. The carboxylic acid-based water-based polyurethane film and the aluminum foil prepared in step S1 are combined with an adhesive on one side, wherein the thickness of the carboxylic acid-based water-based polyurethane film is 0.02 mm, and the used composite pressure is 3 kg/cm 3 , The compounding temperature is 85℃, the pulling speed is 1m/s, and the amount of adhesive is 6g/m 2;
[0056] S3. Coating the other side of the aluminum foil with an adhesive and compounding it with a mixture of microporous silica gel and carbon powder, wherein the volume ratio of the microporous silica gel to the carbon powder is 1:1.25, and the amount of the microporous silica gel 2g/m 2 , The fineness of the microporous silica gel and carbon powder is between 1250-2500 mesh, and the used composite pressure is 8kg/cm 3 , The compounding temperature is 85℃, the pulling speed is 1m/s, and the amount of adhesive is 5g/m 2.
[0057] The preparation method of the aluminum foil in the step S1 is: mixing lithium titanate whiskers and 6061 aluminum alloy powder in a mass ratio of 1:20 for ball milling, smelting the ball milled powder, and then using a continuous casting process to The metal is produced as a billet with a thickness of 8.5±0.5mm suitable for cold rolling. After two cold rolling and one foil rolling, and finally an annealing treatment, a 0.03mm thick air-permeable aluminum foil with dense pinholes on the surface is obtained.
[0058] The relative air humidity during the smelting is 55%.
[0059] The specific operation of the hybrid ball mill includes: the ball mill parameter is the ball-to-material ratio of 8:1, the steel balls are mixed according to the ball diameter from 10mm to 80mm, a total of eight specifications, the ball mill speed is 200r/min, and the ball mill working mode is forward rotation for 900s. Stop for 30s, then reverse for 900s, stop for 30s, and so on, the ball milling time is 4h.
[0060] The specific operation of the second cold rolling and rolling includes: performing one cold rolling under the condition that the billet temperature is less than 80°C, each pass adopts a 15% pass processing rate, after 7 passes of cold rolling, rolling to 0.5±0.05 mm thickness, the H22 state of the converter annealing furnace is used for the first intermediate annealing; the cold-rolled billet after the first intermediate annealing is subjected to secondary cold rolling, each pass adopts a 25% pass processing rate, and 5 passes are cold rolled It is rolled and rolled to a thickness of 0.25±0.05mm, and the second intermediate annealing is performed in the H24 state in the converter annealing furnace.
[0061] The specific operation of the foil rolling includes: passing the cold-rolled blank after the second intermediate annealing through 4 passes of foil rolling, each pass adopts a 35% pass processing rate, and is rolled to a thickness of 0.03mm; The surface of the foil rolling roller is engraved with regular close-packed dot matrix convex dots, the diameter and depth of the concave dots are both less than 0.02mm, and the number of concave dots reaches 9000/m 2.
[0062] The specific operation of the annealing step includes: holding the aluminum foil after the foil rolling process at an annealing temperature of 350° C. for 8 hours, and then holding it at an annealing temperature of 250° C. for 10 hours.
[0063] Before the step S2, it is necessary to carry out the operation of degreasing: alkali washing at 60°C through the alkali washing tank to clean the grease on the surface of the aluminum foil prepared in step S1; wherein the pH value of the alkali solution is 13; after the alkali washing is completed, enter The water tank is washed with high-temperature water to clean the lye remaining on the surface of the aluminum coil. The high-temperature water washing temperature is 60°C. After the washing is completed, the aluminum foil is dried at 180°C.

Example Embodiment

[0064] Example 3
[0065] An air-permeable aluminum air-conditioning foil, the air-permeable aluminum air-conditioning foil is composed of an aluminum foil and a hydrophilic material and a hydrophobic material compounded on both sides of the aluminum foil;
[0066] Wherein, the surface of the aluminum foil is densely covered with pinholes, the thickness of which is 0.02mm, and the number of pinholes reaches 7000/m 2 , The diameter of the pinhole is less than 0.02mm;
[0067] Wherein, the hydrophilic material is a carboxylic acid type waterborne polyurethane film with a thickness of 0.015 mm;
[0068] Wherein, the hydrophobic material is a mixture of microporous silica gel and carbon powder, the volume ratio of the microporous silica gel to the carbon powder is 1:1.25, and the amount of the microporous silica gel is 2 g/m 2 The fineness of the microporous silica gel and carbon powder is between 1250-2500 mesh.
[0069] The method for preparing the air-permeable aluminum air-conditioning foil, wherein the aluminum foil is made of 6061 aluminum alloy, includes the following steps:
[0070] S1. Prepare an aluminum foil with dense pinholes on the surface, the thickness of the aluminum foil is 0.02mm, and the number of pinholes reaches 7000/m 2 , The diameter of the pinhole is less than 0.02mm;
[0071] S2. The carboxylic acid-based water-based polyurethane film and the aluminum foil prepared in step S1 are composited with an adhesive on one side, wherein the thickness of the carboxylic acid-based water-based polyurethane film is 0.015 mm, and the used composite pressure is 3 kg/cm 3 , The compounding temperature is 85℃, the pulling speed is 1m/s, and the amount of adhesive is 6g/m 2;
[0072] S3. Coating the other side of the aluminum foil with an adhesive and compounding it with a mixture of microporous silica gel and carbon powder, wherein the volume ratio of the microporous silica gel to the carbon powder is 1:1.25, and the amount of the microporous silica gel 2g/m 2 , The fineness of the microporous silica gel and carbon powder is between 1250-2500 mesh, and the used composite pressure is 8kg/cm 3 , The compounding temperature is 85℃, the pulling speed is 1m/s, and the amount of adhesive is 5g/m 2.
[0073] The preparation method of the aluminum foil in the step S1 is: mixing lithium titanate whiskers and 6061 aluminum alloy powder in a mass ratio of 1:20 for ball milling, smelting the ball milled powder, and then using a continuous casting process to The metal is produced as a billet with a thickness of 8.5±0.5mm suitable for cold rolling. After two cold rolling and one foil rolling, and finally an annealing treatment, a 0.02mm thick air-permeable aluminum foil with dense pinholes on the surface is obtained.
[0074] The relative air humidity during the smelting is 50%.
[0075] The specific operation of the hybrid ball mill includes: the ball mill parameter is the ball-to-material ratio of 8:1, the steel balls are mixed according to the ball diameter from 10mm to 80mm, a total of eight specifications, the ball mill speed is 200r/min, and the ball mill working mode is forward rotation for 900s. Stop for 30s, then reverse for 900s, stop for 30s, and so on, the ball milling time is 4h.
[0076] The specific operation of the second cold rolling and rolling includes: performing one cold rolling under the condition that the billet temperature is less than 80°C, each pass adopts a 20% pass processing rate, after 6 passes of cold rolling, rolling to 0.5±0.05 mm thickness, the converter annealing furnace is in H22 state for the first intermediate annealing; the cold-rolled billet after the first intermediate annealing is subjected to secondary cold rolling, each pass adopts 30% pass processing rate, and 4 passes are cold rolled It is rolled and rolled to a thickness of 0.25±0.05mm, and the second intermediate annealing is performed in the H24 state in the converter annealing furnace.
[0077] The specific operation of the foil rolling includes: passing the cold-rolled blank after the second intermediate annealing through 3-4 passes of foil rolling, each pass adopts a 40% pass processing rate, and is rolled to a thickness of 0.02mm The surface of the foil roll is engraved with regular densely packed dot matrix convex points, the diameter and depth of the concave points are less than 0.02mm, and the number of concave points reaches 5000-9000/m 2.
[0078] The specific operation of the annealing step includes: holding the aluminum foil after the foil rolling process at an annealing temperature of 350° C. for 8 hours, and then holding it at an annealing temperature of 250° C. for 10 hours.
[0079] Before the step S2, it is necessary to carry out the operation of degreasing: alkali washing through the alkali washing tank at 60°C to clean the grease on the surface of the aluminum foil prepared in step S1; wherein the pH value of the alkali solution is 12; after the alkali washing is completed, enter The water tank is washed with high-temperature water to clean the residual lye on the surface of the aluminum coil. The high-temperature water washing temperature is 55°C. After the washing is completed, the aluminum foil is dried at 180°C.
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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PUM

PropertyMeasurementUnit
Thickness0.01 ~ 0.02mm
Thickness0.01 ~ 0.03mm
Diameter<= 0.02mm
tensileMPa
Particle sizePa
strength10

Description & Claims & Application Information

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the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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