CN113215504A - Oil removing process for improving wetting tension of surface of medicinal aluminum foil - Google Patents
Oil removing process for improving wetting tension of surface of medicinal aluminum foil Download PDFInfo
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- CN113215504A CN113215504A CN202010070153.9A CN202010070153A CN113215504A CN 113215504 A CN113215504 A CN 113215504A CN 202010070153 A CN202010070153 A CN 202010070153A CN 113215504 A CN113215504 A CN 113215504A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/04—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G5/00—Cleaning or de-greasing metallic material by other methods; Apparatus for cleaning or de-greasing metallic material with organic solvents
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- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
Abstract
The invention discloses an oil removing process for improving the surface wetting tension of a medicinal aluminum foil, which belongs to the technical field of medicinal aluminum foil processing and comprises the following steps: (1) heating the annealing furnace to a preset temperature; (2) the aluminum foil to be degreased is arranged in the annealing furnace frame and is placed on the annealing furnace trolley; (3) opening the furnace door after the preset temperature is reached, and feeding the aluminum foil to be treated into the furnace by using an annealing furnace trolley; (4) negative pressure annealing is adopted in a negative pressure furnace to release the oil in the aluminum coil to a certain degree; (5) preserving the heat for a preset time at a preset temperature; (6) and opening the furnace door after the heat is preserved for a preset time, taking out the annealing furnace trolley, and naturally cooling the annealing furnace trolley in the air to room temperature, wherein the preset temperature is 75-85 ℃, the preset time is 4.5-5 hours, and the pressure in the negative pressure furnace is 3.9-4.9 kPa. The invention overcomes the defects of low dyne value, long oil removing time and high energy consumption of the blister medicinal aluminum foil processed by the traditional aluminum foil oil removing process, improves the surface tension value of the aluminum foil to 34 dynes and meets the requirements of users.
Description
Technical Field
The invention belongs to the technical field of processing of medicinal aluminum foils, relates to an aluminum foil negative pressure oil removal process technology, and particularly relates to an oil removal process for improving the wetting tension of a medicinal aluminum foil.
Background
With the progress of science and technology, the application of aluminum foil as a packaging sealing material is more and more extensive, and people have higher and higher requirements on the quality of the surface of the aluminum foil, particularly products such as heat sealing foil, medicinal foil, hose foil and the like. Besides the requirement that the aluminum foil has proper mechanical property and a smooth and bright surface, the aluminum foil surface is required to be degreased cleanly so as to ensure the safety and the applicability of a final product.
The replacement of the aluminum foil rolling mill improves the mechanical processing speed and the production efficiency, so that more or less rolling oil is attached to the surface of the aluminum foil which is just rolled, and the oil attachment amount of filtering per square meter is about 0.4g through tests. The surface wetting tension of the aluminum foil is directly related to the oil quantity attached to the surface of the aluminum foil, the surface tension of the completely deoiled aluminum foil is above 72 dynes, the surface tension of the aluminum foil after rough rolling is about 31 dynes, and the surface tension of the aluminum foil after finish rolling is about 32 dynes. If the oil removal is not complete, the aluminum foil product has the defects of oil adhesion, bubbling, line formation, oil spots and the like, the defects generally do not appear periodically in the finished product and are not easy to find in the inspection, and the reason is mainly caused by the fact that the rolling oil on the surface of the aluminum foil is not cleaned completely.
For the blister medical aluminum foil, because higher strength is required and the blister medical aluminum foil is delivered in a hard state, rolling oil is attached to the surface of the aluminum foil, and the aluminum foil is required to be compounded with PVC when in use, the aluminum foil is required to be better when less oil is attached to the surface of the aluminum foil, that is, the higher the wetting tension of the surface of the aluminum foil is, the better the dyne value is, and the dyne value is required to be more than 34 by general users. However, in production practice, the rolled product is generally only 32 dynes. Accordingly, an appropriate degreasing process is urgently needed to improve the surface wetting tension of the medicinal aluminum foil and meet the requirement of tensile strength index.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a negative pressure oil removal process technology for improving the surface wetting tension of the medicinal aluminum foil, so that the medicinal aluminum foil product subjected to oil removal meets the requirements of tensile strength and wetting tension indexes.
Through a large number of researches and experiments, the tensile strength of the aluminum foil is closely related to the oil removal temperature and the oil removal time, the tensile strength of the aluminum foil is reduced along with the increase of the temperature, and the tensile strength of the aluminum foil is reduced along with the extension of the time at a certain temperature point before the aluminum foil is completely recrystallized, so that the optimal temperature and time are required to be set according to the requirement of a user on the tensile strength to achieve the optimal tensile strength of the aluminum foil.
Particularly, in order to ensure the consistency of the tensile strength and the surface wetting tension indexes of the aluminum foil processed by each annealing furnace, the temperature of the annealing furnace is preferably raised to the preset temperature and then fed in consideration of the difference of the temperature rise and the heat preservation performance of the annealing furnace, so that the influence of the difference of the annealing furnace on the performance indexes of the products is reduced.
In order to make the medical aluminum foil product meet the required index requirements, the invention adopts the technical scheme that:
an oil removing process for improving wetting tension of a medicinal aluminum foil comprises the following steps:
(1) heating the annealing furnace to a preset temperature;
(2) the aluminum foil to be degreased is arranged in the annealing furnace frame and is placed on the annealing furnace trolley;
(3) opening the furnace door after the preset temperature is reached, and feeding the aluminum foil to be treated into the furnace by using an annealing furnace trolley;
(4) negative pressure annealing is adopted in a negative pressure furnace to release oil in the aluminum coil to a certain degree, and the pressure in the negative pressure furnace is 3.9-4.9 kPa;
(5) preserving the heat for a preset time at a preset temperature;
(6) and opening the furnace door after the heat preservation is carried out for a preset time, taking out the annealing furnace trolley, and naturally cooling the annealing furnace trolley to room temperature in the air.
Specifically, the aluminum foil is 8011 alloy.
In the better disclosed example of the invention, when the surface tension of the aluminum foil reaches 34 dynes and the tensile strength is not lower than 150MPa, the oil removing temperature of the annealing furnace is set to be 85 ℃, the oil removing time is set to be 5 hours, and the elongation of the aluminum foil in the process is not lower than 2%.
In the better disclosed example of the invention, when the surface tension of the aluminum foil reaches 34 dynes and the tensile strength is not lower than 160MPa, the oil removing temperature of the annealing furnace is set to 82 ℃, the oil removing time is set to 4.5 hours, and the elongation of the aluminum foil in the process is not lower than 2%.
In the better disclosed example of the invention, when the surface tension of the aluminum foil reaches 34 dynes and the tensile strength is not lower than 170MPa, the oil removing temperature of the annealing furnace is set to be 80 ℃, the oil removing time is set to be 4.5 hours, and the elongation of the aluminum foil in the process is not lower than 2%.
In the better disclosed example of the invention, when the surface tension of the aluminum foil reaches 34 dynes and the tensile strength is not lower than 180MPa, the oil removing temperature of the annealing furnace is set to be 76 ℃, the oil removing time is set to be 5 hours, and the elongation of the aluminum foil in the process is not lower than 2%.
The conventional aluminum foil production generally adopts a heat treatment method to remove oil, and mainly depends on the heated volatilization of oil in the annealing process. Since the recrystallization temperature of pure aluminum foil is about 240-260 ℃, the distillation range of aluminum foil rolling oil is about 200-260 ℃, the annealing temperature is generally 310 ℃ and the annealing period is 10-40 hours in the past established annealing process. The annealing process has high temperature, oil burning, oil film carbon chain decomposition and oxidation, aluminum foil pollution and yellow brown oil spot.
At present, a method of long-time heat preservation at 230 ℃ is generally adopted to ensure annealing and complete oil removal or segmented heat preservation for respectively removing oil and annealing. The practical result shows that: for the mechanical property of 0.007-0.15mm aluminum foil products, the international requirement can be met only by annealing for 10-15 hours, and the oil removal time is 28-35 hours. The adjustment of mechanical properties and oil removal are difficult to be carried out simultaneously, so a great deal of time is wasted in the oil removal annealing process, and research, analysis, adjustment and improvement on annealing process, aluminum foil charging mode and the like have been carried out in the past, but the effects are not great.
Because the annealing treatment for improving the mechanical property of the material is not needed after the aluminum foil is rolled in the pharmaceutical industry, but the requirement for oil removal is higher, if the annealing oil removal process is continuously used, on one hand, the oil removal time is longer, the production efficiency is reduced, on the other hand, the oil removal temperature is higher, the unnecessary energy consumption is increased, and in addition, the performance is too low, and the rupture strength is poor. Therefore, the negative pressure oil removing process disclosed by the invention is particularly suitable for 8011 alloy aluminum foil, so that the purpose of improving the surface wetting tension of the medicinal aluminum foil is achieved, and the requirements of users are well met.
Advantageous effects
The invention discloses a negative pressure oil removing process for improving wetting tension of a medicinal aluminum foil, which overcomes the defects of low dyne value, long oil removing time and high energy consumption of a blister medicinal aluminum foil processed by the traditional aluminum foil oil removing process, realizes the purpose of improving the surface tension value of the aluminum foil to 34 dynes, and meets the requirements of users.
Detailed Description
The present invention will be described in detail below with reference to examples to enable those skilled in the art to better understand the present invention, but the present invention is not limited to the following examples.
Unless otherwise defined, terms (including technical and scientific terms) used herein should be construed to have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It will be further understood that terms used herein should be interpreted as having a meaning that is consistent with their meaning in the context of this specification and the relevant art, and should not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
Example 1
The oil removing process of the 8011 alloy aluminum foil with the surface tension value of 34 dynes, the tensile strength of 150MPa and the elongation of 2 percent comprises the following steps:
firstly, heating an annealing furnace to 85 ℃ and keeping the temperature constant, wherein the pressure in a negative pressure furnace is 3.9-4.9 kPa;
secondly, the 8011 alloy aluminum foil to be treated is arranged in an annealing furnace frame and is placed on an annealing furnace trolley, a furnace door is opened after the temperature of the annealing furnace reaches 85 ℃ and is kept constant, and the 8011 alloy aluminum foil to be treated is sent into the furnace by the annealing furnace trolley;
thirdly, preserving the heat for 5 hours at the constant temperature of 85 ℃;
and finally, opening the furnace door after heat preservation is carried out for 5 hours, taking out the annealing furnace trolley, naturally cooling the annealing furnace trolley to room temperature in the air, and carrying out index detection.
Example 2
The oil removing process of the 8011 alloy aluminum foil with the surface tension value of 34 dynes, the tensile strength of 160MPa and the elongation of 2 percent comprises the following steps:
firstly, heating an annealing furnace to 82 ℃ and keeping the temperature constant, wherein the pressure in a negative pressure furnace is 3.9-4.9 kPa;
secondly, the 8011 alloy aluminum foil to be treated is arranged in an annealing furnace frame and is placed on an annealing furnace trolley, a furnace door is opened after the temperature of the annealing furnace reaches 82 ℃, and the 8011 alloy aluminum foil to be treated is sent into the furnace by the annealing furnace trolley;
thirdly, preserving the heat for 4.5 hours at the constant temperature of 82 ℃;
and finally, opening the furnace door after heat preservation is carried out for 4.5 hours, taking out the annealing furnace trolley, naturally cooling the annealing furnace trolley to room temperature in the air, and carrying out index detection.
Example 3
The oil removing process of the 8011 alloy aluminum foil with the surface tension value of 34 dynes, the tensile strength of 170MPa and the elongation of 2 percent comprises the following steps:
firstly, heating an annealing furnace to 80 ℃ and keeping the temperature, wherein the pressure in a negative pressure furnace is 3.9-4.9 kPa;
secondly, the 8011 alloy aluminum foil to be treated is arranged in an annealing furnace frame and is placed on an annealing furnace trolley, a furnace door is opened after the temperature of the annealing furnace reaches 80 ℃ and is kept constant, and the 8011 alloy aluminum foil to be treated is sent into the furnace by the annealing furnace trolley;
thirdly, keeping the temperature for 4.5 hours at the constant temperature of 80 ℃;
and finally, opening the furnace door after heat preservation is carried out for 4.5 hours, taking out the annealing furnace trolley, naturally cooling the annealing furnace trolley to room temperature in the air, and carrying out index detection.
Example 4
The oil removing process of the 8011 alloy aluminum foil with the surface tension value of 34 dynes, the tensile strength of 180MPa and the elongation of 2 percent comprises the following steps:
firstly, heating an annealing furnace to 76 ℃ and keeping the temperature, wherein the pressure in a negative pressure furnace is 3.9-4.9 kPa;
secondly, the 8011 alloy aluminum foil to be treated is arranged in an annealing furnace frame and is placed on an annealing furnace trolley, a furnace door is opened after the temperature of the annealing furnace reaches 76 ℃, and the 8011 alloy aluminum foil to be treated is sent into the furnace by the annealing furnace trolley;
closing the furnace door, and starting a negative pressure fan and heating to 76 ℃;
thirdly, preserving the heat for 5 hours at the constant temperature of 76 ℃;
and finally, opening the furnace door after heat preservation is carried out for 5 hours, taking out the annealing furnace trolley, naturally cooling the annealing furnace trolley to room temperature in the air, and carrying out index detection.
The results of index detection of the aluminum foils after degreasing in examples 1 to 4 are shown in the following table:
the process treatment of the embodiment is suitable for removing oil from the blister medicinal aluminum foil, is particularly suitable for treating 8011 alloy aluminum foil, and has surface tension reaching 34 dynes.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes performed by the present invention or directly or indirectly applied to other related technical fields are included in the scope of the present invention.
Claims (6)
1. An oil removing process for improving the surface wetting tension of a medicinal aluminum foil comprises the following steps,
(1) heating the annealing furnace to a preset temperature;
(2) the aluminum foil to be treated is arranged in an annealing furnace frame and is placed on an annealing furnace trolley;
(3) after reaching the preset temperature, feeding the annealing furnace trolley filled with the aluminum foil to be treated into the furnace;
(4) negative pressure annealing is adopted in a negative pressure furnace to release the oil in the aluminum coil to a certain degree;
(5) preserving the heat for a preset time at a preset temperature;
(6) opening the furnace door after the preset time of heat preservation, taking out the annealing furnace trolley, and naturally cooling the annealing furnace trolley in the air to room temperature;
the method is characterized in that: the preset temperature is 75-85 ℃, the preset time is 4.5-5 hours, and the pressure in the negative pressure furnace is 3.9-4.9 kPa.
2. The degreasing process of claim 1, wherein: the aluminum foil is 8011 alloy.
3. The degreasing process of claim 2, wherein: when the surface tension of the aluminum foil reaches 34 dynes and the tensile strength reaches 150MPa, the oil removing temperature of the annealing furnace is set to be 85 ℃, and the oil removing time is set to be 5 hours.
4. The degreasing process of claim 2, wherein: when the surface tension of the aluminum foil reaches 34 dynes and the tensile strength reaches 160MPa, the oil removing temperature of the annealing furnace is set to 82 ℃, and the oil removing time is set to 4.5 hours.
5. The degreasing process of claim 2, wherein: when the surface tension of the aluminum foil reaches 34 dynes and the tensile strength reaches 170MPa, the oil removing temperature of the annealing furnace is set to be 80 ℃, and the oil removing time is set to be 4.5 hours.
6. The degreasing process of claim 2, wherein: when the surface tension of the aluminum foil reaches 34 dynes and the tensile strength reaches 180MPa, the oil removing temperature of the annealing furnace is set to be 76 ℃, and the oil removing time is set to be 5 hours.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114798771A (en) * | 2022-04-12 | 2022-07-29 | 神隆宝鼎新材料有限公司 | Method for improving surface cleaning and wetting performance of battery foil and battery foil produced by method |
| CN115323293A (en) * | 2022-08-01 | 2022-11-11 | 三明市三菲铝业有限公司 | Aluminum foil annealing process for lunch box |
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| CN1111681A (en) * | 1995-03-30 | 1995-11-15 | 云南铝加工厂 | Technology of sectional type negative pressure anneal oil removing for aluminium material |
| CN102847733A (en) * | 2012-08-20 | 2013-01-02 | 洛阳首龙铝业有限责任公司 | Aluminum foil vacuum low-temperature oil removing process and equipment |
| CN103131972A (en) * | 2011-12-01 | 2013-06-05 | 湖南晟通科技集团有限公司 | Aluminum foil continuous annealing method and aluminum foil continuous annealing furnace |
| CN106282863A (en) * | 2016-09-08 | 2017-01-04 | 江苏大亚铝业有限公司 | High-peeling strength food packaging aluminium foil high temperature negative pressure anneal technique |
| CN106521372A (en) * | 2016-11-23 | 2017-03-22 | 洛阳万基铝加工有限公司 | Finished product annealing process for double zero aluminum foils |
| CN110195197A (en) * | 2019-06-20 | 2019-09-03 | 乳源东阳光优艾希杰精箔有限公司 | A kind of aluminium volume anneal oil removing method |
-
2020
- 2020-01-21 CN CN202010070153.9A patent/CN113215504A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1111681A (en) * | 1995-03-30 | 1995-11-15 | 云南铝加工厂 | Technology of sectional type negative pressure anneal oil removing for aluminium material |
| CN103131972A (en) * | 2011-12-01 | 2013-06-05 | 湖南晟通科技集团有限公司 | Aluminum foil continuous annealing method and aluminum foil continuous annealing furnace |
| CN102847733A (en) * | 2012-08-20 | 2013-01-02 | 洛阳首龙铝业有限责任公司 | Aluminum foil vacuum low-temperature oil removing process and equipment |
| CN106282863A (en) * | 2016-09-08 | 2017-01-04 | 江苏大亚铝业有限公司 | High-peeling strength food packaging aluminium foil high temperature negative pressure anneal technique |
| CN106521372A (en) * | 2016-11-23 | 2017-03-22 | 洛阳万基铝加工有限公司 | Finished product annealing process for double zero aluminum foils |
| CN110195197A (en) * | 2019-06-20 | 2019-09-03 | 乳源东阳光优艾希杰精箔有限公司 | A kind of aluminium volume anneal oil removing method |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114798771A (en) * | 2022-04-12 | 2022-07-29 | 神隆宝鼎新材料有限公司 | Method for improving surface cleaning and wetting performance of battery foil and battery foil produced by method |
| CN115323293A (en) * | 2022-08-01 | 2022-11-11 | 三明市三菲铝业有限公司 | Aluminum foil annealing process for lunch box |
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