A laminated hot melt adhesive applied to a soft package battery and a preparation method thereof

Abstract

The application discloses a laminated hot melt adhesive applied to a soft package battery and a preparation method thereof, and relates to the field of hot melt adhesives. The laminated hot melt adhesive comprises the following components in parts by weight: SEBS rubber 1.5-10.5 parts, SIS rubber 15.0-35.0 parts, naphthenic oil 8.0-16.0 parts, hydrogenated petroleum resin 15.0-30.0 parts, pure monomer resin 3.0-10.0 parts, terpene resin 10.0-25.0 parts, polyisobutylene 8.0-16.0 parts, cold-resistant toughening agent 8.0-15.0 parts, low-temperature-resistant tackifying resin 5.0-12.0 parts, and antioxidant 0.6-2.0 parts. The laminated hot melt adhesive effectively solves the problems that conventional hot melt adhesives are prone to peeling apart at high temperature 60 DEG C, have poor adhesion, low shear strength and small peeling force, and solves the problem that conventional hot melt adhesives become brittle at low temperature-40 DEG C and have basically no peeling force.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of hot melt adhesive, in particular to a kind of laminated hot melt adhesive applied to soft package battery and preparation method thereof. BACKGROUND

[0002] At present, most of the laminated soft package battery is stacked by adhesive tape, and the adhesive on the adhesive tape is mostly oily adhesive, which has the following disadvantages: first, the solvent volatilization during production and preparation of oily adhesive can easily cause environmental pollution, and second, it cannot be automated, and with the current high demand for efficiency, automation is particularly important.

[0003] However, the conventional hot melt adhesive has a narrow high and low temperature resistance range and cannot be applied to the laminated soft package battery, while the working temperature of the battery is generally-40-60 DEG C. The conventional hot melt adhesive is basically tack-free at-40 DEG C and is easily peeled off, and the shear force is not enough at 60 DEG C, which can easily cause the soft package battery to move up and down, thereby affecting its use, and the peel strength is not enough, which can easily fall off. SUMMARY

[0004] In order to overcome the shortcomings of the prior art, one of the purposes of the present application is to provide a kind of laminated hot melt adhesive applied to soft package battery. The hot melt adhesive of the present application effectively overcomes the problem of narrow high and low temperature resistance range of conventional hot melt adhesive, specifically solves the problem of easy peeling of conventional hot melt adhesive at high temperature 60 DEG C, poor adhesion, low shear strength and small peeling force, and at the same time, solves the problem of brittleness of conventional hot melt adhesive at low temperature-40 DEG C, basically no peeling force.

[0005] The second purpose of the present application is to provide a kind of preparation method of laminated hot melt adhesive applied to soft package battery.

[0006] One of the purposes of the present application is achieved by the following technical scheme: a kind of laminated hot melt adhesive applied to soft package battery, including the following components by weight: SEBS rubber 1.5-10.5 parts, SIS rubber 15.0-35.0 parts, naphthenic oil 8.0-16.0 parts, hydrogenated petroleum resin 15.0-30.0 parts, pure monomer resin 3.0-10.0 parts, terpene resin 10.0-25.0 parts, polyisobutylene 8.0-16.0 parts, cold-resistant toughening agent 8.0-15.0 parts, low-temperature resistant tackifying resin 5.0-12.0 parts, antioxidant 0.6-2.0 parts.

[0007] Further, the SEBS rubber is one or a combination of several of the SEBS rubbers with the trade name 3150, 3154, 6152, 6153 from Kraton Corporation, 501 from Yuke Chemical, G1652, G1535, G1654, G1650 from Kuraray Co., Ltd.

[0008] Further, the naphthenic oil is one of the naphthenic oils with the trade name N4016, 4010 from Karamay Company.

[0009] Further, the hydrogenated petroleum resin is one or a mixture of two or more of the hydrogenated petroleum resins with the trade name 5100 from Exxon Corporation, C-125W, C-115R from Eastman Chemical Company, P-125, D0313 from Arakawa Chemical Industries, Ltd.

[0010] Further, the pure monomer resin is one or a mixture of two or more of the pure monomer resins with the trade name 290LV, P-150, F115 from Eastman Chemical Company, TM-90 from Lutian Group.

[0011] Further, the terpene resin is one or a mixture of two or more of the terpene resins with the trade name H150 from DRT Company, 7042, 6100 from Kuraray Co., Ltd., 803L from Arakawa Chemical Industries, Ltd., T-100 from Condensia Quimica Madrilena, S.A.

[0012] Further, the polyisobutylene is one or a mixture of two or more of the polyisobutylenes with the trade name PB1300, PB950, PB2400 from Hanwha L&L Corporation.

[0013] Further, the cold resistance toughening agent is one or a mixture of two of the cold resistance toughening agents with the trade name A-940 from China Jinquan Company, DH-C002 from Dongguan Dinghai Plastic Chemical Industry Co., Ltd.

[0014] Further, the low temperature resistance tackifying resin is one or a mixture of two of the low temperature resistance tackifying resins with the trade name Wingtack 10 from Krusewitz Company, T-35 from Songbo Chemical Industry Co., Ltd.

[0015] The second purpose of the application is achieved by the following technical solution: a laminated hot melt adhesive applied to a soft package battery and a preparation method thereof, comprising the following steps:

[0016] (1) the reactor is warmed to 135-140 DEG C, antioxidant, appropriate amount of naphthenic oil and SEBS rubber are put in, stirred for 20-30 min, scraped tank, continue to stir for 30-50 min, sample checking whether no granular, after its fully melt good;

[0017] (2) the remaining naphthenic oil is put in, the temperature is warmed to 150-155 DEG C, pure monomer resin is put in, after the pure monomer resin is dissolved well, SIS rubber and cold resistance toughening agent are added, continue to stir for 10-20 min, scraped tank, continue to stir for 30-50 min, sample checking whether no granular, until all materials in the reactor are fully stirred uniformly;

[0018] (3) under the condition of continuous stirring, terpene resin is first put in, then hydrogenated petroleum resin is put in, after melting, low temperature resistance tackifying resin and polyisobutylene are added, the temperature is controlled to 150-160 DEG C, then vacuum is extracted, continuously stirred for 40-50 min, finally glue is packed.

[0019] Compared with the prior art, the hot melt adhesive has the beneficial effects that:

[0020] The hot melt adhesive effectively overcomes the problem of narrow high and low temperature range interval of conventional hot melt adhesive, specifically solves the problems of easy peeling, poor adhesion, low shear strength and small peeling force of conventional hot melt adhesive at high temperature 60 DEG C, and solves the problem of brittleness, basically no peeling force of conventional hot melt adhesive at low temperature-40 DEG C, so that it does not stick at-40 DEG C and is not easy to peel, and the shear force is sufficient at 60 DEG C, so that it does not move up and down on the soft package battery and does not fall off, ensuring the normal use of the hot melt adhesive on the laminated sheet. DETAILED DESCRIPTION

[0021] In the following, the application is further described in conjunction with specific embodiments, and it should be noted that the following described embodiments or technical features can be combined to form new embodiments without conflict.

[0022] In the application, unless otherwise specified, all parts and percentages are weight units, and the equipment and raw materials used can be purchased from the market or are commonly used in the art. The methods in the following examples are conventional methods in the art, unless otherwise specified.

[0023] The present application provides a kind of laminated hot melt adhesive applied to soft package battery, comprising the following components by weight: SEBS rubber 1.5-10.5 parts, SIS rubber 15.0-35.0 parts, naphthenic oil 8.0-16.0 parts, hydrogenated petroleum resin 15.0-30.0 parts, pure monomer resin 3.0-10.0 parts, terpene resin 10.0-25.0 parts, polyisobutylene 8.0-16.0 parts, cold-resistant toughening agent 8.0-15.0 parts, low-temperature tackifying resin 5.0-12.0 parts, antioxidant 0.6-2.0 parts.

[0024] The formula principle of the present application is as follows:

[0025] The present application patent adds SEBS rubber and SIS rubber, which can improve the cohesion of the glue at high temperature, and improve the open time of the glue, adds polyisobutylene, which can increase the wettability of SIS rubber together, adds terpene resin to improve the peel strength, adds high softening point hydrogenated petroleum resin to improve the shear force of hot melt adhesive at high temperature, adds pure monomer resin to effectively improve the peel strength at high temperature, adds modified cold-resistant toughening agent to effectively improve the toughness of hot melt adhesive at low temperature, not easy to become brittle, improve its bending resistance at low temperature, adds low-temperature tackifying resin to effectively improve its peel strength at low temperature.

[0026] The hot melt adhesive of the present application effectively overcomes the problem of narrow high and low temperature range of conventional hot melt adhesive, specifically solves the shortcomings of conventional hot melt adhesive, such as easy to peel off at high temperature 60℃, poor adhesion, low shear strength and small peel strength, at the same time, solves the shortcomings of conventional hot melt adhesive, such as brittle at low temperature-40℃, basically no peel strength, makes it not easy to peel off at-40℃, and the shear force is enough at 60℃, which will not cause the soft package battery to move up and down, will not fall off, ensures the normal use of hot melt adhesive on the laminated sheet, and can be applied to the laminated sheet pasting of soft package battery.

[0027] As a further preferred scheme, the SEBS rubber is one or a combination of several of the SEBS rubbers with the trade name 3150, 3154, 6152, 6153 from the company Kraton, the trade name 501 from Yuehua Company, and the trade name G1652, G1535, G1654, G1650 from the company Kortec; the SIS rubber is one or a combination of several of the SIS rubbers with the trade name 3270, 3280, 3433N, 3460C, 3520 from the company Kraton, the trade name 1924 from the company Haiqi New Material, the trade name D1162, D1124, D1119 from the company Kortec, and the trade name 4411, 4211 from the company Tai Xiang.

[0028] As a further preferred scheme, the naphthenic oil is one of the naphthenic oils with the trade name N4016, 4010 from the company Karamay.

[0029] As a further preferred solution, the hydrogenated petroleum resin is selected from one or more than two mixtures of the following: Exxon Mobil's brand 5100, Eastman's brand C-125W, C-115R, Arakawa Chemical's brand P-125, D0313.

[0030] As a further preferred solution, the pure monomer resin is selected from one or more than two mixtures of the following: Eastman's brand 290LV, P-150, F115, Lutian's brand TM-90.

[0031] As a further preferred solution, the terpene resin is selected from one or more than two mixtures of the following: DRT's brand H150, Kuraray's brand 7042, 6100, Arakawa Chemical's brand 803L, Conde's brand T-100.

[0032] As a further preferred solution, the polyisobutylene is selected from one or more than two mixtures of the following: Korea's brand PB1300, PB950, PB2400.

[0033] As a further preferred solution, the cold resistance toughening agent is selected from one or more than two mixtures of the following: China's brand A-940, Dongguan Dinghai Plastic Chemical Co., Ltd.'s brand DH-C002.

[0034] As a further preferred solution, the low temperature resistant tackifying resin is selected from one or more than two mixtures of the following: Kravitz's brand Wingtack 10, Songbao Chemical's brand T-35.

[0035] As a further preferred solution, the antioxidant is selected from one or more than two mixtures of the following: Foshan Yuansheng Chemical Co., Ltd.'s brand 1010, Foshan Yuansheng Chemical Co., Ltd.'s brand 168.

[0036] The present application also provides a preparation method of the above-mentioned laminated hot melt adhesive, comprising the following steps:

[0037] (1) The reactor is heated to 135-140℃, and the antioxidant, a proper amount of naphthenic oil and SEBS rubber are put in, stirred for 20-30min, scraped, and continuously stirred for 30-50min, and the sample is checked to see if there is any granular, and after it is fully melted;

[0038] (2) Put the remaining naphthenic oil, heat up, the temperature needs to reach 150-155℃, put in pure monomer resin, after the pure monomer resin is dissolved well, add SIS rubber and cold resistance toughening agent and continue to stir for 10-20min, scrape the tank, continue to stir for 30-50min, check whether there is no granular by sampling, until all the materials in the reactor are fully stirred and uniform;

[0039] (3) Under the condition of constant stirring, first put in terpene resin, then put in hydrogenated petroleum resin, melt well, then add low temperature resistance tackifying resin and polyisobutylene, control the temperature to be 150-160℃, then vacuumize, constantly stir for 40-50min, finally glue packaging.

[0040] The following are specific embodiments of the present application, in the following examples, the raw materials, equipment and the like used in the following examples can be obtained by purchase unless otherwise specified.

[0041] Examples 1-4 and Comparative Examples 1-12

[0042] The raw materials are weighed according to the ratio in Table 1, and the hot melt adhesive is prepared according to the preparation method in Table 1-3, and different examples of hot melt adhesive are obtained, which are shown in Table 1-3 in detail.

[0043] Table 1 Raw material ratio table of examples 1-4

[0044]

[0045]

[0046] Table 2 Raw material ratio table of comparative examples 1-5

[0047]

[0048]

[0049]

[0050] Table 2 Raw material ratio table of comparative examples 6-10

[0051]

[0052]

[0053] Among them, the SBS in comparative example 3 is SBS rubber 791 of Yuehua.

[0054] Comparative example 1 and example 2 are different from example 2 in that SEBS is not added, the rest of the components and the amount are the same, and the process parameters are the same.

[0055] Comparative Example 2 is different from Example 2 in that SIS is not added, the other components and amounts are the same, and the process parameters are the same.

[0056] Comparative Example 3 is different from Example 2 in that SIS is replaced by SBS, the other components and amounts are the same, and the process parameters are the same.

[0057] Comparative Example 4 is different from Example 2 in that hydrogenated petroleum resin is not added, the other components and amounts are the same, and the process parameters are the same.

[0058] Comparative Example 5 is different from Example 2 in that pure monomer resin is not added, the other components and amounts are the same, and the process parameters are the same.

[0059] Comparative Example 6 is different from Example 2 in that terpene resin is not added, the other components and amounts are the same, and the process parameters are the same.

[0060] Comparative Example 7 is different from Example 2 in that polyisobutylene is not added, the other components and amounts are the same, and the process parameters are the same.

[0061] Comparative Example 8 is different from Example 2 in that cold-resistant toughening agent is not added, the other components and amounts are the same, and the process parameters are the same.

[0062] Comparative Example 9 is different from Example 2 in that low-temperature resistant tackifying resin is not added, the other components and amounts are the same, and the process parameters are the same.

[0063] Comparative Example 10 is different from Example 2 in that both polyisobutylene and SIS rubber are not added, the other components and amounts are the same, and the process parameters are the same.

[0064] The preparation method of the hot melt adhesive of Example 1-Example 4 and Comparative Examples 1-10 comprises the following steps:

[0065] (1) The reaction kettle is heated to 135-140°C, antioxidant, appropriate amount of naphthenic oil and SEBS rubber are added, stirred for 20-30 min, scraped, continue to stir for 30-50 min, check whether there is no granular, after it is fully melted;

[0066] (2) Put the remaining naphthenic oil, heat up, the temperature needs to reach 150-155℃, put in pure monomer resin, after the pure monomer resin is dissolved well, add SIS rubber and cold resistance toughening agent and continue to stir for 10-20min, scrape the tank, continue to stir for 30-50min, check whether there is no granular by sampling, until all the materials in the reactor are fully stirred and uniform;

[0067] (3) Under the condition of continuous stirring, first put in terpene resin, then put in hydrogenated petroleum resin, melt well, then add low temperature resistant tackifying resin and polyisobutylene, control the temperature at 150-160℃, then vacuum, continuous stirring for 40-50min, finally glue packaging.

[0068] Effect evaluation and performance detection

[0069] The properties of the hot melt adhesives obtained in Examples 1-4 and Comparative Examples 1-11 were detected, and the detection items and results are shown in Table 4. Comparative Example 11 uses 3M tape currently used in the market, purchased from 3M Longjin official store, model 9448A

[0070] 1. T-type peel force test method at-40℃

[0071] The T-type peel force test process at-40℃ is as follows: the test substrate is aluminum plastic film, the test strip size is 150*25mm, the glue thickness is 0.1mm, the test speed is 100mm / min, and the test method is ASTM D1876. The result is recorded in units of N / 25mm.

[0072] 2. T-type peel force test method at 60℃

[0073] The T-type peel force test process at 60℃ is as follows: the test substrate is aluminum plastic film, the test strip size is 150*25mm, the glue thickness is 0.1mm, the test speed is 100mm / min, and the test method is ASTM D1876. The result is recorded in units of N / 25mm.

[0074] 3. Shear force test method at-40℃

[0075] The shear force test process at-40℃ is as follows: the test substrate is aluminum plastic film, the test strip size is 150*25mm, the overlap size is 12.7*25mm, the glue thickness is 0.1mm, the test speed is 5mm / min, and the test method is ASTM D1002-1. The result is recorded in units of Mpa.

[0076] 4. Shear force test method at 60℃

[0077] The shear force test at 60°C was carried out as follows: the test substrate was an aluminum plastic film, the test strip size was 150*25 mm, the overlapping size was 12.7*25 mm, the glue thickness was 0.1 mm, the test speed was 5 mm / min, and the test method was ASTM D1002-1. The result was recorded in units of Mpa.

[0078] 5. Open time test method

[0079] The open time test was carried out as follows: the glue was sprayed onto an aluminum plastic film, and then the time for the other aluminum plastic film to be effectively attached was recorded in seconds.

[0080] Table 4 is the performance test data of the hot melt adhesives of the examples

[0081]

[0082]

[0083] As shown in the above table, the hot melt adhesives of Examples 1-4 did not lose tack at -40°C and were not easy to peel off, and the shear force at 60°C was sufficient, which did not cause movement on the soft pack battery and did not fall off, ensuring the normal use of the hot melt adhesive on the laminated sheet and being applicable to the laminated sheet pasting of the soft pack battery.

[0084] Taking Example 2 as an example, Comparative Example 1 differs from Example 2 in that SEBS is not added, and the cohesive force of the hot melt adhesive becomes small, and the T-type peeling force at 60°C and the shear force at 60°C of the hot melt adhesive become significantly small.

[0085] Taking Example 2 as an example, Comparative Example 2 differs from Example 2 in that SIS is not added, and the adhesion of the hot melt adhesive to the substrate is not enough, and the T-type peeling force and shear force at -40°C and the T-type peeling force at 60°C of the hot melt adhesive become small compared with Example 2, and the open time becomes short.

[0086] Taking Example 2 as an example, Comparative Example 3 differs from Example 2 in that SBS replaces SIS, and the open time of the hot melt adhesive becomes significantly short, which will affect its construction, and the T-type peeling force and shear force of the hot melt adhesive are not enough, which is due to the insufficient wetting property of SBS.

[0087] Taking Example 2 as an example, Comparative Example 4 differs from Example 2 in that hydrogenated petroleum resin is not added, which will affect the peeling force of the formula, and the T-type peeling force at 60°C of the hot melt adhesive is significantly reduced, the shear force at 60°C of the hot melt adhesive is also reduced, and the open time is also shortened.

[0088] Taking Example 2 as an example, Comparative Example 5 differs from Example 2 in that pure monomer resin is not added, which affects the high temperature resistance of the formula, and therefore the T-type peeling force and shear force at 60°C of the hot melt adhesive are significantly reduced.

[0089] Comparative Example 6 is different from Example 2 in that no terpene resin is added, which will affect the adhesion of the glue to the substrate, especially the adhesion and peel force at 60℃. Compared with Example 2, the T-peel force and shear force of Comparative Example 6 at 60℃ are significantly reduced, which is mainly due to the fact that the glue is easy to separate from the substrate at 60℃, thereby causing the T-peel force and shear force to decrease.

[0090] Comparative Example 7 is different from Example 2 in that no polyisobutylene is added, which affects the wetting performance of the formula, so that the glue cannot be well combined with the substrate after the substrate is attached, thereby causing the T-peel force and shear force of the glue to decrease and the open time to be shortened.

[0091] Comparative Example 8 is different from Example 2 in that no cold-resistant toughening agent is added, which will make the glue not tough at -40℃, thereby affecting the T-peel force at -40℃.

[0092] Comparative Example 9 is different from Example 2 in that no low-temperature resistant tackifying resin is added. If the low-temperature resistant tackifying resin is not added, the T-peel at low temperature will not be enough, thereby affecting the T-peel force and shear force at -40℃.

[0093] Comparative Example 10 is different from Example 2 in that no polyisobutylene and SIS rubber are added at the same time, which will seriously affect the adhesion and wetting of the glue to the substrate. The T-peel force and shear force at -40℃, as well as the T-peel force at 60℃, will be significantly reduced. This also reflects the fact that the SIS and polyisobutylene are used in combination in the present application, the open time of the glue is long, the adhesion and wetting of the glue to the substrate are better, and if the open time is too short, the work efficiency of automation will be affected, which will also cause the battery modules to be poorly attached, thereby affecting the application.

[0094] Comparative Example 11 is a 3M tape currently used, which is model 9448A. The T-peel force and shear force of the examples of the present application at -40℃ or 60℃ are greater than those of the 3M tape.

[0095] The above embodiments are only preferred embodiments of the present application, and cannot be used to limit the scope of protection of the present application. Any non-essential changes and substitutions made by those skilled in the art on the basis of the present application are within the scope of the present application.

Claims

1. A lamination hot melt adhesive applied to a pouch battery, characterized by, The components include the following components by weight: SEBS rubber 1.5-10.5 parts, SIS rubber 15.0-35.0 parts, naphthenic oil 8.0-16.0 parts, hydrogenated petroleum resin 15.0-30.0 parts, pure monomer resin 3.0-10.0 parts, terpene resin 10.0-25.0 parts, polyisobutylene 8.0-16.0 parts, cold resistance toughening agent 8.0-15.0 parts, low temperature tackifying resin 5.0-12.0 parts, antioxidant 0.6-2.0 parts.

2. The lamination hot melt adhesive for a pouch battery according to claim 1, wherein The SEBS rubber is one or a combination of several of the following: SEBS rubber with the trade name 3150, 3154, 6152, 6153 from the company Kraton, 501 from Yuehua, G1652, G1535, G1654, G1650 from the company Kraton; the SIS rubber is one or a combination of several of the following: SIS rubber with the trade name 3270, 3280, 3433N, 3460C, 3520 from the company Kraton, 1924 from the company Haiqi, D1162, D1124, D1119 from the company Kraton, 4411, 4211 from the company Tai Xiang. 3.The lamination hot melt adhesive applied to a pouch battery according to claim 1, wherein, The naphthenic oil is one of the following: naphthenic oil with the trade name N4016, 4010 from the company Karamay. 4.The lamination hot melt adhesive applied to a pouch battery according to claim 1, wherein, The hydrogenated petroleum resin is one or a mixture of two or more of the following: hydrogenated petroleum resin with the trade name 5100 from the company Exxon, C-125W, C-115R from the company Eastman, P-125, D0313 from the company Kakwa. 5.The lamination hot melt adhesive applied to a pouch battery of claim 1, wherein, The pure monomer resin is one or a mixture of two or more of the following: pure monomer resin with the trade name 290LV, P-150, F115 from the company Eastman, TM-90 from the company Lutianfu.

6. The lamination hot melt adhesive for a pouch battery according to claim 1, wherein The terpene resin is one or a mixture of two or more of the following: terpene resin with the trade name H150 from the company DRT, 7042, 6100 from the company Kraton, 803L from the company Kakwa, T-100 from the company Condies. 7.The lamination hot melt adhesive applied to a pouch battery according to claim 1, wherein, The polyisobutylene is one or a mixture of two or more of the following: polyisobutylene with the trade name PB1300, PB950, PB2400 from the company Daehan. 8.The lamination hot melt adhesive applied to a pouch battery of claim 1, wherein, The cold resistance toughening agent is one or a mixture of two of the following: cold resistance toughening agent with the trade name A-940 from the company Jinquan, DH-C002 from the company Dongguan Dinghai. 9.The lamination hot melt adhesive applied to a pouch battery of claim 1, wherein, The low temperature tackifying resin is one or a mixture of two of the following: low temperature tackifying resin with the trade name Wingtack 10 from the company Kravitz, T-35 from the company Songbao.

10. A method of preparing the lamination hot melt adhesive for use in a pouch battery according to any one of claims 1 to 9, characterized by, The method comprises the following steps: The reaction kettle is heated to 135-140℃, the antioxidant, an appropriate amount of naphthenic oil and SEBS rubber are added, stirred for 20-30min, scraped, continue to stir for 30-50min, check whether there are particles, and after the SEBS rubber is fully melted; Put the remaining naphthenic oil, temperature, temperature needs to reach 150-155 ℃, put in pure monomer resin, after the pure monomer resin dissolves well, add SIS rubber and cold resistance toughening agent continue to stir 10-20 min, scrape the tank, continue to stir 30-50 min, check whether no granular, until the reaction kettle all material is fully stirred uniformity; Under the condition of continuous stirring, first put in terpene resin, then put in hydrogenated petroleum resin, melt well, then add low temperature resistance tackifying resin and polyisobutylene, control the temperature at 150-160 ℃, then vacuum, continuous stirring 40-50 min, finally glue packaging.

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