CN107643246B - Method for detecting foaming force of thermosensitive adhesive tape - Google Patents
Method for detecting foaming force of thermosensitive adhesive tape Download PDFInfo
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- CN107643246B CN107643246B CN201610579296.6A CN201610579296A CN107643246B CN 107643246 B CN107643246 B CN 107643246B CN 201610579296 A CN201610579296 A CN 201610579296A CN 107643246 B CN107643246 B CN 107643246B
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Abstract
The invention provides a method for detecting foaming force of a thermal sensitive adhesive tape, which comprises the following steps: s10: taking off release paper on one side of the double-sided tape, and sticking the double-sided tape on the surface of the side, which is not sticky, of the thermal sensitive tape; s20: adhering the thermal tape having one side adhered with the double-sided tape prepared in the step S10 to the surface of the metal foil; s30: placing the side, away from the heat-sensitive adhesive tape, of the metal foil prepared in the step S20 on a heating table for baking; s40: reinforcing the baked metal foil in the step S30; s50: and (4) testing the tensile strength of the metal foil reinforced in the step (S40) and the thermal sensitive adhesive tape adhered to the surface of the metal foil by using a tensile strength tester. The process can accurately find out important parameters in the preparation process of the lithium battery under the condition of low cost. Greatly reducing the economic cost in the production of the lithium battery. In addition, the unit capacity of the lithium ion battery can be effectively improved.
Description
Technical Field
The invention relates to the technical field of lithium ion batteries, in particular to a method for detecting foaming power of a thermal sensitive adhesive tape.
Background
The lithium ion battery has the advantages of high working voltage, large energy density (light weight), long cycle life, no memory effect, no pollution and the like, and also has the advantages of safety, reliability, rapid charge and discharge and the like, thereby becoming a main power supply of various electronic products. Because the lithium ion battery is a green environment-friendly pollution-free secondary battery, the lithium ion battery meets the great development requirements of energy and environmental protection in various countries at present, and the usage amount of the lithium ion battery in various industries is rapidly increased. At present, secondary lithium ion batteries are widely used in digital electronic products such as mobile phones, notebook computers, MP3, etc. which are well known in daily life, and have also started to be used in high-power batteries such as electric vehicles and electric bicycles.
At present, the cathode and the anode of the electrode in the lithium ion battery are produced by adopting continuous coating, the coating is a key link in the manufacturing of the anode of the lithium ion battery, and good anode materials have direct influence on the performances of the battery such as the capacity and the like. Coating refers to a method of preparing a composite film by coating a paste polymer, a molten polymer or a polymer solution on a film, and in the case of a lithium ion battery, a coated substrate (film) is a metal foil, generally a copper foil or an aluminum foil.
The coating process is a plurality of continuous processes from the step of putting the substrate into a coating machine (called unreeling) to the step of taking the coated substrate out of the coating machine (called unreeling), and after the coating is finished, the surface of a local electrode is cleaned by laser so as to be conveniently welded with a tab. However, in the laser cleaning, the surface of the aluminum foil or the copper foil is oxidized at high temperature, so that the performance of the aluminum foil or the copper foil is reduced, and therefore, the unit capacity of the lithium ion battery after the service life is reduced.
The existing test method of the pressure-sensitive adhesive generally refers to national standards: GB/T2792-1998, but the standard is generally used for testing the adhesive performance of the pressure-sensitive adhesive tape under standard conditions, and the adhesive performance under other temperature conditions cannot be evaluated. In particular, the adhesive property of the thermal tape at the foaming temperature cannot be detected.
In addition, the heat-sensitive adhesive tape also relates to the change of the baking effect of the polymer slurry on the surface of the heat-sensitive adhesive tape in the application process of the lithium ion battery, and the polymer slurry has a certain inhibiting effect on the foaming effect of the heat-sensitive adhesive tape, so that the existing detection method cannot meet the requirement.
Therefore, it is urgently needed to design a detection method for applying the thermal tape to the lithium ion battery so as to improve the production quality of the lithium ion battery.
Disclosure of Invention
In view of this, the present invention provides a method for detecting foaming force of a thermal tape, comprising the following steps:
s10: taking off release paper on one side of the double-sided tape, and sticking the double-sided tape on the surface of the side, which is not sticky, of the thermal sensitive tape;
s20: adhering the thermal tape having one side adhered with the double-sided tape prepared in the step S10 to the surface of the metal foil;
s30: placing the side, away from the heat-sensitive adhesive tape, of the metal foil prepared in the step S20 on a heating table for baking;
s40: reinforcing the baked metal foil in the step S30;
s50: adopting a tensile strength tester to test the tensile strength of the metal foil reinforced in the step S40 and the thermal sensitive adhesive tape stuck on the surface of the metal foil; specifically, the metal foil and the thermal sensitive adhesive tape with the double-sided adhesive tape are fixed at two ends of a tensile strength tester, and the tensile strength tester separates the metal foil and the thermal sensitive adhesive tape with the double-sided adhesive tape and obtains the tensile force required for separating the metal foil and the thermal sensitive adhesive tape with the double-sided adhesive tape adhered to one side.
In certain embodiments, the metal foil is an aluminum foil or a copper foil.
In some embodiments, step S20 is preceded by a process of placing the thermal tape in an environment with a temperature of 23 ℃ ± 2 ℃ and a relative humidity of not more than 55% ± 5% for at least two hours.
In some embodiments, the aluminum foil has a thickness of 8 to 15 μm.
In some embodiments, a process of pressing the thermal tape with the double-sided tape adhered to one side thereof against the surface of the metal foil by using a pressing roller is further included between the steps S30 and S40, so as to prevent air bubbles from being present at the joint of the thermal tape and the metal foil.
In some embodiments, the first stage heating temperature of the heating platform is 70 to 100 degrees.
In some embodiments, the second stage heating temperature of the heating platform is 101-120 degrees.
In some embodiments, the metal foil is baked for about 20 seconds while placed on the heated platen.
In some embodiments, the tensile machine performs the tensile strength test at a test speed of 3 mm/min.
In some embodiments, the mass of the compression roller is about 2000g, the rolling speed is 300 mm/min, and bubbles at the joint of the thermal sensitive adhesive tape and the aluminum foil are avoided.
The method for detecting the foaming force of the thermal sensitive adhesive tape has the advantages that:
the detection method can effectively analyze the application effect of the thermal sensitive adhesive tape in the lithium ion battery, and avoids the phenomenon that the existing detection method cannot detect the bonding performance of the thermal sensitive adhesive tape at the foaming temperature. And repeated experiments prove that the double-sided adhesive tape is adhered outside the thermal sensitive adhesive tape, so that the surface polymer slurry involved in the application process of the thermal sensitive adhesive tape in the lithium ion battery can be well simulated. The baking effect of the heat-sensitive adhesive tape is consistent with the influence of the baked polymer on the foaming effect of the heat-sensitive adhesive tape. The inhibition effect of the double-sided adhesive tape on the foaming effect of the heat-sensitive adhesive tape is consistent with the inhibition effect of the polymer slurry. And the influence of the polymer slurry coated on the thermal sensitive adhesive tape along with the baking temperature on the foaming of the thermal sensitive adhesive tape is simulated by using the double-sided adhesive tape, which is discovered and applied for the first time in the industry.
The heat-sensitive adhesive tape with the double-sided adhesive tape adhered thereto is placed on a heating stage after being adhered to a metal foil. When the baking temperature of the heating platform is lower, the action force of the foaming force of the heat-sensitive adhesive tape coated with the polymer slurry on the surface of the heat-sensitive adhesive tape after the heat-sensitive adhesive tape is initially foamed can be simulated. If the foaming force of the thermal sensitive adhesive tape at the temperature is small and the bonding strength of the thermal sensitive adhesive tape to the metal foil after surface foaming is still large, the cohesive strength of the coated polymer slurry cannot be damaged during foaming at a low temperature section, the polymer slurry coated on the surface of the thermal sensitive adhesive tape cannot be separated from the polymer slurry coated on the periphery of the thermal sensitive adhesive tape, fracture cannot be realized, and the flatness of the damaged section can be ensured.
When the baking temperature of the heating platform is higher, the adhesive strength of the thermosensitive adhesive tape coated with the polymer slurry and the metal foil after the thermosensitive adhesive tape is foamed to the maximum extent can be simulated. If the foaming force is small, it is indicated that the adhesion strength between the heat-sensitive adhesive tape and the metal foil after maximum foaming is too high and the tape is hard to fall off. Therefore, the thermal tape and the polymer paste on the surface of the thermal tape cannot be separated from the metal foil well, and the function of protecting the metal foil cannot be realized.
If the thermal tape is separated from the metal foil in advance, the tensile strength measured by the tensile strength tester is zero. This situation may lead to: since the coated polymer paste is not completely dried, the polymer paste around the thermal tape is easily damaged during the foaming and curling processes of the thermal tape, which affects the battery capacity. Secondly, the detached heat-sensitive adhesive tape and the polymer paste on the surface thereof stay in the oven, and the cleanability of the coating oven is also affected.
Meanwhile, the detection method can be used for carrying out pre-experimental design on the baking temperature of the lithium battery and carrying out process groping.
In conclusion, the invention has the advantages and practical values, and similar methods are not published or used in the similar products, so that the invention is innovative. Not only provides a method for detecting the foaming force of the thermal sensitive adhesive tape. And the process can accurately find out important parameters in the preparation process of the lithium battery under the condition of low cost. Greatly reducing the economic cost in the production of the lithium battery. In addition, the unit capacity of the lithium ion battery can be effectively improved, and the service life of the lithium ion battery is prolonged.
Drawings
It is to be understood that the following drawings illustrate only certain embodiments of this invention and are therefore not to be considered limiting of its scope, for those skilled in the art will appreciate that other related drawings may be made from these drawings without inventive faculty.
Fig. 1 is a flowchart of a method for manufacturing a lithium ion battery according to an embodiment of the present invention.
Detailed Description
The following claims are presented in conjunction with specific embodiments to further detail the invention, and in the following description numerous specific details are set forth in order to provide a thorough understanding of the invention.
This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, but rather should be construed as broadly as the present invention is capable of modification in various respects, all without departing from the spirit and scope of the present invention.
Referring to fig. 1, the invention provides a method for detecting foaming force of a thermal adhesive tape, comprising the following steps:
s10: taking off release paper on one side of the double-sided tape, and sticking the double-sided tape on the surface of the side, which is not sticky, of the thermal sensitive tape;
s20: adhering the thermal tape having one side adhered with the double-sided tape prepared in the step S10 to the surface of the metal foil;
s30: placing the side, away from the heat-sensitive adhesive tape, of the metal foil prepared in the step S20 on a heating table for baking;
s40: reinforcing the baked metal foil in the step S30;
s50: adopting a tensile strength tester to test the tensile strength of the metal foil reinforced in the step S40 and the thermal sensitive adhesive tape stuck on the surface of the metal foil; specifically, the metal foil and the thermal sensitive adhesive tape with the double-sided adhesive tape are fixed at two ends of a tensile strength tester, and the tensile strength tester separates the metal foil and the thermal sensitive adhesive tape with the double-sided adhesive tape and obtains the tensile force required for separating the metal foil and the thermal sensitive adhesive tape with the double-sided adhesive tape adhered to one side.
Above, preferably the double-sided adhesive tape is a NITTO double-sided adhesive tape: no.5000NS, its width is not less than 15 mm.
It is understood that, for different sizes of thermal tape: it is generally required to keep the length of the thermal tape bonded to the metal foil at 11mm, and the width can be determined according to the actual situation. Preferably, the length of the thermal tape is 17mm to 25mm, especially 22 mm. The length of the double-sided tape is larger than that of the thermal sensitive tape, so that the double-sided tape and the end face of the thermal sensitive tape can be cut to be flush.
It should be noted that, preferably, during the detection, one side of the double-sided tape is adhered to the non-adhesive surface of the thermal tape, and the release paper on the other side of the double-sided tape should not be removed. The method can better simulate the influence of polymer slurry on the foaming of the thermal tape.
Further, in S40, the baked metal foil in step S30 is reinforced. The specific mode is that one side of the metal foil of the baked heat-sensitive adhesive tape, which deviates from the heat-sensitive adhesive tape, is attached with a common adhesive tape to strengthen the strength of the metal foil, so that the metal foil is prevented from being damaged under the stretching of a tensile strength tester and damaged.
It should be understood that when the strength of the metal foil is enhanced by using the general adhesive tape, the general adhesive tape is not attached to the heat-sensitive adhesive tape or the double-sided adhesive tape.
The detection method can effectively analyze the application effect of the thermal sensitive adhesive tape in the lithium ion battery, and avoids the phenomenon that the existing detection method cannot detect the bonding performance of the thermal sensitive adhesive tape at the foaming temperature. And repeated experiments prove that the double-sided adhesive tape is adhered outside the thermal sensitive adhesive tape, so that the surface polymer slurry involved in the application process of the thermal sensitive adhesive tape in the lithium ion battery can be well simulated. The baking effect of the heat-sensitive adhesive tape is consistent with the influence of the baked polymer on the foaming effect of the heat-sensitive adhesive tape. The inhibition effect of the double-sided adhesive tape on the foaming effect of the heat-sensitive adhesive tape is consistent with the inhibition effect of the polymer slurry. And the influence of the polymer slurry coated on the thermal sensitive adhesive tape along with the baking temperature on the foaming of the thermal sensitive adhesive tape is simulated by using the double-sided adhesive tape, which is discovered and applied for the first time in the industry.
The heat-sensitive adhesive tape with the double-sided adhesive tape adhered thereto is placed on a heating stage after being adhered to a metal foil. When the baking temperature of the heating platform is lower, the action force of the foaming force of the heat-sensitive adhesive tape coated with the polymer slurry on the surface of the heat-sensitive adhesive tape after the heat-sensitive adhesive tape is initially foamed can be simulated. If the foaming force of the thermal sensitive adhesive tape at the temperature is small and the bonding strength of the thermal sensitive adhesive tape to the metal foil after surface foaming is still large, the cohesive strength of the coated polymer slurry cannot be damaged during foaming at a low temperature section, the polymer slurry coated on the surface of the thermal sensitive adhesive tape cannot be separated from the polymer slurry coated on the periphery of the thermal sensitive adhesive tape, fracture cannot be realized, and the flatness of the damaged section can be ensured.
When the baking temperature of the heating platform is higher, the adhesive strength of the thermosensitive adhesive tape coated with the polymer slurry and the metal foil after the thermosensitive adhesive tape is foamed to the maximum extent can be simulated. If the foaming force is small, it is indicated that the adhesion strength between the heat-sensitive adhesive tape and the metal foil after maximum foaming is too high and the tape is hard to fall off. Therefore, the thermal tape and the polymer paste on the surface of the thermal tape cannot be separated from the metal foil well, and the function of protecting the metal foil cannot be realized.
If the thermal tape is separated from the metal foil in advance, the tensile strength measured by the tensile strength tester is zero. This situation may lead to: since the coated polymer paste is not completely dried, the polymer paste around the thermal tape is easily damaged during the foaming and curling processes of the thermal tape, which affects the battery capacity. Secondly, the detached heat-sensitive adhesive tape and the polymer paste on the surface thereof stay in the oven, and the cleanability of the coating oven is also affected.
Meanwhile, the detection method can be used for carrying out pre-experimental design on the baking temperature of the lithium battery and carrying out process groping.
In conclusion, the invention has the advantages and practical values, and similar methods are not published or used in the similar products, so that the invention is innovative. Not only provides a method for detecting the foaming force of the thermal sensitive adhesive tape. And the process can accurately find out important parameters in the preparation process of the lithium battery under the condition of low cost. Greatly reducing the economic cost in the production of the lithium battery. In addition, the unit capacity of the lithium ion battery can be effectively improved, and the service life of the lithium ion battery is prolonged.
Further, the metal foil is an aluminum foil or a copper foil.
Further, step S20 is preceded by a process of placing the thermal tape in an environment with a temperature of 23 ℃ ± 2 ℃ and a relative humidity of not more than 55% ± 5% for at least two hours.
Furthermore, the thickness of the aluminum foil is 8-15 μm.
Further, a process of pressing the thermal tape with the double-sided tape adhered to one side thereof to the surface of the metal foil by a pressing roller is further included between the steps S30 and S40, so as to avoid bubbles at the joint of the thermal tape and the metal foil.
Furthermore, the heating temperature of the first stage of the heating platform is 70-100 ℃.
Preferably, the first stage heating temperature of the heating platform is 90 degrees.
Furthermore, the heating temperature of the second stage of the heating platform is 101-120 ℃.
Preferably, the second stage heating temperature of the heating platform is 102 degrees.
Further, the time for baking the metal foil on the heating stage is about 20 seconds.
Preferably, the time for the foil to be baked while placed on the heating stage is about 21 seconds or 19 seconds.
Further, when the tensile strength test is carried out by the tensile machine, the test speed is 3 mm/min.
Furthermore, the mass of the compression roller is about 2000g, the rolling speed is 300mnm/min, and bubbles at the joint of the thermal sensitive adhesive tape and the aluminum foil are avoided.
Preferably, the press roll is a rubber press roll.
It is understood that the method for detecting the foaming force of the thermal sensitive adhesive tape can be used for preparing lithium batteries and other types of batteries.
In order to facilitate understanding of the present invention, the following embodiments are provided to further illustrate the technical solutions of the present invention. The applicant states that the present invention is illustrated by the above examples to show the detailed process equipment and process flow of the present invention, but the present invention is not limited to the above detailed process equipment and process flow, i.e. it is not meant to imply that the present invention should be implemented by relying on the above detailed process equipment and process flow. It should be understood by those skilled in the art that any modification of the present invention, equivalent substitutions of the raw materials of the product of the present invention, addition of auxiliary components, selection of specific modes, etc., are within the scope and disclosure of the present invention.
Example 1
Taking off release paper on one side of the double-sided tape, and sticking the double-sided tape on the surface of the side, which is not sticky, of the thermal sensitive tape; then sticking the prepared thermal sensitive tape with the double-sided adhesive tape stuck on one side on the surface of an aluminum foil, wherein the thickness of the aluminum foil is 8 mu m; then placing one side of the prepared aluminum foil, which is far away from the thermal sensitive adhesive tape, on a heating table top for baking, wherein the baking temperature is 70 ℃, and the baking time is 20 seconds; adhering a common adhesive tape to one side of the baked aluminum foil, which is far away from the thermosensitive adhesive tape, so as to enhance the strength of the aluminum foil; testing the tensile strength of the reinforced aluminum foil and the thermal sensitive adhesive tape stuck to the surface of the reinforced aluminum foil by using a tensile strength tester; the testing speed is 3 mm/min; the aluminum foil and the thermal sensitive adhesive tape adhered with the double-sided adhesive tape are fixed at two ends of a tensile strength tester, and the tensile strength tester separates the aluminum foil and the thermal sensitive adhesive tape adhered with the double-sided adhesive tape and obtains the tensile force required for separating the aluminum foil and the thermal sensitive adhesive tape adhered with the double-sided adhesive tape on one side.
Example 2
Taking off release paper on one side of the double-sided tape, and sticking the double-sided tape on the surface of the side, which is not sticky, of the thermal sensitive tape; then sticking the prepared thermal sensitive tape with the double-sided tape stuck on one side on the surface of a copper foil, wherein the thickness of the copper foil is 12 mu m; then placing one side of the prepared copper foil, which is far away from the thermal sensitive adhesive tape, on a heating table top for baking, wherein the baking temperature is divided into two stages, the heating temperature in the first stage is 80 ℃, and the baking time is 20 seconds; the heating temperature of the second stage is 101 ℃, and the baking time is 20 seconds; after baking, a rubber compression roller with the mass of 2000g is used for pressing the thermosensitive adhesive tape with the double-sided adhesive tape adhered to one side at the rolling speed of 300 mm/min on the surface of the copper foil, so that bubbles at the joint of the thermosensitive adhesive tape and the copper foil are avoided; then, attaching a common adhesive tape to one side of the copper foil, which is far away from the thermal sensitive adhesive tape, so as to enhance the strength of the copper foil; adopting a tensile strength tester to test the tensile strength of the reinforced copper foil and the thermal sensitive adhesive tape stuck on the surface of the reinforced copper foil; the test speed was 3 mm/min. Fixing the copper foil and the thermal sensitive adhesive tape adhered with the double-sided adhesive tape at two ends of a tensile strength tester, and separating the copper foil and the thermal sensitive adhesive tape adhered with the double-sided adhesive tape by the tensile strength tester while acquiring the tensile force required for separating the thermal sensitive adhesive tape adhered with the double-sided adhesive tape at one side from the copper foil.
Example 3
Placing the thermal sensitive adhesive tape in an environment with the temperature of 23 +/-2 ℃ and the relative humidity of 55 +/-5% for two hours, taking off release paper on one side of the double-sided adhesive tape, and adhering the double-sided adhesive tape to the surface of the non-adhesive side of the thermal sensitive adhesive tape; then sticking the prepared thermal sensitive tape with the double-sided tape stuck on one side on the surface of a copper foil, wherein the thickness of the copper foil is 15 mu m; then placing one side of the prepared copper foil, which is far away from the thermal sensitive adhesive tape, on a heating table top for baking, wherein the baking temperature is divided into two stages, the heating temperature of the first stage is 100 ℃, and the baking time is 21 seconds; the heating temperature of the second stage is 102 ℃, and the baking time is 21 seconds; after baking, a rubber compression roller with the mass of 2000g is used for pressing the thermosensitive adhesive tape with the double-sided adhesive tape adhered to one side at the rolling speed of 300 mm/min on the surface of the copper foil, so that bubbles at the joint of the thermosensitive adhesive tape and the copper foil are avoided; then, attaching a common adhesive tape to one side of the copper foil, which is far away from the thermal sensitive adhesive tape, so as to enhance the strength of the copper foil; adopting a tensile strength tester to test the tensile strength of the reinforced copper foil and the thermal sensitive adhesive tape stuck on the surface of the reinforced copper foil; the test speed was 3 mm/min. Fixing the copper foil and the thermal sensitive adhesive tape adhered with the double-sided adhesive tape at two ends of a tensile strength tester, and separating the copper foil and the thermal sensitive adhesive tape adhered with the double-sided adhesive tape by the tensile strength tester while acquiring the tensile force required for separating the thermal sensitive adhesive tape adhered with the double-sided adhesive tape at one side from the copper foil.
Example 4
Placing the thermal sensitive adhesive tape in an environment with the temperature of 23 +/-2 ℃ and the relative humidity of 50 +/-5% for five hours, taking off release paper on one side of the double-sided adhesive tape, and adhering the double-sided adhesive tape to the surface of the non-adhesive side of the thermal sensitive adhesive tape; then sticking the prepared thermal sensitive tape with the double-sided tape stuck on one side on the surface of a copper foil, wherein the thickness of the copper foil is 10 mu m; then placing one side of the prepared copper foil, which is far away from the thermal sensitive adhesive tape, on a heating table top for baking, wherein the baking temperature is divided into two stages, the heating temperature in the first stage is 75 ℃, and the baking time is 19 seconds; the heating temperature of the second stage is 101 ℃, and the baking time is 19 seconds; after baking, a rubber compression roller with the mass of 2000g is used for pressing the thermosensitive adhesive tape with the double-sided adhesive tape adhered to one side at the rolling speed of 300 mm/min on the surface of the copper foil, so that bubbles at the joint of the thermosensitive adhesive tape and the copper foil are avoided; then, attaching a common adhesive tape to one side of the copper foil, which is far away from the thermal sensitive adhesive tape, so as to enhance the strength of the copper foil; adopting a tensile strength tester to test the tensile strength of the reinforced copper foil and the thermal sensitive adhesive tape stuck on the surface of the reinforced copper foil; the test speed was 3 mm/min. Fixing the copper foil and the thermal sensitive adhesive tape adhered with the double-sided adhesive tape at two ends of a tensile strength tester, and separating the copper foil and the thermal sensitive adhesive tape adhered with the double-sided adhesive tape by the tensile strength tester while acquiring the tensile force required for separating the thermal sensitive adhesive tape adhered with the double-sided adhesive tape at one side from the copper foil.
Example 5
Placing the thermal sensitive adhesive tape in an environment with the temperature of 23 +/-2 ℃ and the relative humidity of 35 +/-5% for eight hours, taking off release paper on one side of the double-sided adhesive tape, and adhering the double-sided adhesive tape to the surface of the non-adhesive side of the thermal sensitive adhesive tape; then sticking the prepared thermal sensitive tape with the double-sided adhesive tape stuck on one side on the surface of an aluminum foil, wherein the thickness of the aluminum foil is 10 mu m; then placing one side of the prepared aluminum foil, which is far away from the thermal sensitive adhesive tape, on a heating table top for baking, wherein the baking temperature is divided into two stages, the heating temperature in the first stage is 90 ℃, and the baking time is 20 seconds; the heating temperature of the second stage is 102 ℃, and the baking time is 20 seconds; after baking, a rubber compression roller with the mass of 2000g is used for pressing the thermosensitive adhesive tape with the double-sided adhesive tape stuck on one side on the surface of the aluminum foil at the rolling speed of 300 mm/min, so that bubbles are prevented from existing at the joint of the thermosensitive adhesive tape and the aluminum foil; then, attaching a common adhesive tape to one side of the aluminum foil, which is far away from the heat-sensitive adhesive tape, so as to enhance the strength of the aluminum foil; testing the tensile strength of the reinforced aluminum foil and the thermal sensitive adhesive tape stuck to the surface of the reinforced aluminum foil by using a tensile strength tester; the test speed was 3 mm/min. The aluminum foil and the thermal sensitive adhesive tape adhered with the double-sided adhesive tape are fixed at two ends of a tensile strength tester, and the tensile strength tester separates the aluminum foil and the thermal sensitive adhesive tape adhered with the double-sided adhesive tape and obtains the tensile force required for separating the aluminum foil and the thermal sensitive adhesive tape adhered with the double-sided adhesive tape on one side.
Example 6
Placing the thermal sensitive adhesive tape in an environment with the temperature of 23 +/-2 ℃ and the relative humidity of 25 +/-5% for twelve hours, taking off release paper on one side of the double-sided adhesive tape, and adhering the double-sided adhesive tape to the surface of the non-adhesive side of the thermal sensitive adhesive tape; then sticking the prepared thermal sensitive tape with the double-sided tape stuck on one side on the surface of a copper foil, wherein the thickness of the copper foil is 8 mu m; then placing one side of the prepared copper foil, which is far away from the thermal sensitive adhesive tape, on a heating table top for baking, wherein the baking temperature is divided into two stages, the heating temperature of the first stage is 100 ℃, and the baking time is 20 seconds; the heating temperature of the second stage is 101 ℃, and the baking time is 20 seconds; after baking, a rubber compression roller with the mass of 2000g is used for pressing the thermosensitive adhesive tape with the double-sided adhesive tape adhered to one side at the rolling speed of 300 mm/min on the surface of the copper foil, so that bubbles at the joint of the thermosensitive adhesive tape and the copper foil are avoided; then, attaching a common adhesive tape to one side of the copper foil, which is far away from the thermal sensitive adhesive tape, so as to enhance the strength of the copper foil; adopting a tensile strength tester to test the tensile strength of the reinforced copper foil and the thermal sensitive adhesive tape stuck on the surface of the reinforced copper foil; the test speed was 3 mm/min. Fixing the copper foil and the thermal sensitive adhesive tape adhered with the double-sided adhesive tape at two ends of a tensile strength tester, and separating the copper foil and the thermal sensitive adhesive tape adhered with the double-sided adhesive tape by the tensile strength tester while acquiring the tensile force required for separating the thermal sensitive adhesive tape adhered with the double-sided adhesive tape at one side from the copper foil.
Example 7
Placing the thermal sensitive adhesive tape in an environment with the temperature of 23 ℃ +/-2 ℃ and the relative humidity of 25% +/-5% for twelve hours, taking off the release paper on one side of a double-sided adhesive tape (NITTO double-sided adhesive tape: No.5000NS), and sticking the double-sided adhesive tape on the surface of the non-adhesive side of the thermal sensitive adhesive tape; then sticking the prepared thermal sensitive tape with the double-sided tape stuck on one side on the surface of an aluminum foil, wherein the thickness of the aluminum foil is 11 mu m; then placing one side of the prepared aluminum foil, which is far away from the thermal sensitive adhesive tape, on a heating table top for baking, wherein the baking temperature is divided into two stages, the heating temperature of the first stage is 100 ℃, and the baking time is 20 seconds; the heating temperature of the second stage is 101 ℃, and the baking time is 20 seconds; after baking, a rubber compression roller with the mass of 2000g is used for pressing the thermosensitive adhesive tape with the double-sided adhesive tape stuck on one side on the surface of the aluminum foil at the rolling speed of 300 mm/min, so that bubbles are prevented from existing at the joint of the thermosensitive adhesive tape and the aluminum foil; then, attaching a common adhesive tape to one side of the aluminum foil, which is far away from the heat-sensitive adhesive tape, so as to enhance the strength of the aluminum foil; testing the tensile strength of the reinforced aluminum foil and the thermal sensitive adhesive tape stuck to the surface of the reinforced aluminum foil by using a tensile strength tester; the test speed was 3 mm/min. The aluminum foil and the thermal sensitive adhesive tape adhered with the double-sided adhesive tape are fixed at two ends of a tensile strength tester, and the tensile strength tester separates the aluminum foil and the thermal sensitive adhesive tape adhered with the double-sided adhesive tape and obtains the tensile force required for separating the aluminum foil and the thermal sensitive adhesive tape adhered with the double-sided adhesive tape on one side.
The applicant asserts that the present invention through the above listing of a series of detailed descriptions is only a specific description of a possible embodiment of the present invention, but the present invention is not limited to the above detailed process equipment and process flow. And is not intended to imply that the invention should be practiced in the exact apparatus and process steps set forth. It should be understood by those skilled in the art that any modification of the present invention, equivalent substitutions of the raw materials of the product of the present invention, addition of auxiliary components, selection of specific modes, etc., are within the scope and disclosure of the present invention.
Claims (9)
1. A method for detecting foaming force of a thermal sensitive adhesive tape is characterized by comprising the following steps: the method comprises the following steps:
s10: taking off release paper on one side of the double-sided tape, and sticking the double-sided tape on the surface of the side, which is not sticky, of the thermal sensitive tape;
s20: adhering the thermal tape having one side adhered with the double-sided tape prepared in the step S10 to the surface of the metal foil;
s30: placing the side, away from the heat-sensitive adhesive tape, of the metal foil prepared in the step S20 on a heating table for baking;
s40: reinforcing the baked metal foil in the step S30;
s50: adopting a tensile strength tester to test the tensile strength of the metal foil reinforced in the step S40 and the thermal sensitive adhesive tape stuck on the surface of the metal foil; specifically, the metal foil and the thermal sensitive adhesive tape adhered with the double-sided adhesive tape are fixed at two ends of a tensile strength tester, and the tensile strength tester separates the metal foil and the thermal sensitive adhesive tape adhered with the double-sided adhesive tape and obtains the tensile force required for separating the metal foil and the thermal sensitive adhesive tape adhered with the double-sided adhesive tape at one side;
the step between the step S30 and the step S40 further includes a process of pressing the thermal tape with the double-sided tape adhered to one side thereof against the surface of the metal foil by a pressing roller, so as to avoid bubbles at the joint of the thermal tape and the metal foil.
2. The method of detecting a foaming force of a thermal tape according to claim 1, wherein: the metal foil is an aluminum foil or a copper foil.
3. The method of detecting a foaming force of a thermal tape according to claim 1, wherein: step S20 is preceded by a process of placing the thermal tape in an environment with a temperature of 23 ℃ ± 2 ℃ and a relative humidity of not more than 55% ± 5% for at least two hours.
4. The method of detecting a foaming force of a thermal tape according to claim 2, wherein: the thickness of the aluminum foil is 8-15 mu m.
5. The method of detecting a foaming force of a thermal tape according to claim 1, wherein: the first-stage heating temperature of the heating platform is 70-100 ℃.
6. The method of detecting a foaming force of a thermal tape according to claim 1, wherein: the second stage heating temperature of the heating platform is 101-120 ℃.
7. The method of detecting foaming force of a thermal tape according to claim 5 or 6, wherein: the time for the foil to bake was about 20 seconds when placed on the heated platen.
8. The method of detecting a foaming force of a thermal tape according to claim 1, wherein: when the tensile machine is used for testing the tensile strength, the testing speed is 3 mm/min.
9. The method for detecting a foaming force of a thermal tape according to claim 1, wherein: the mass of the compression roller is about 2000g, the rolling speed is 300mnm/min, and bubbles at the joint of the thermal sensitive adhesive tape and the aluminum foil are avoided.
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Denomination of invention: A Method for Detecting the Foaming Force of Thermosensitive Tape Effective date of registration: 20230818 Granted publication date: 20200410 Pledgee: Agricultural Bank of China Limited Xinfeng County Sub branch Pledgor: XINFENG GHILLIE ELECTRIC MATERIALS CO.,LTD. Registration number: Y2023980052798 |
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