CN115651553A - High-adhesion-holding hot-melt pressure-sensitive foam adhesive tape for lithium battery packaging and preparation method thereof - Google Patents
High-adhesion-holding hot-melt pressure-sensitive foam adhesive tape for lithium battery packaging and preparation method thereof Download PDFInfo
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- CN115651553A CN115651553A CN202211331525.4A CN202211331525A CN115651553A CN 115651553 A CN115651553 A CN 115651553A CN 202211331525 A CN202211331525 A CN 202211331525A CN 115651553 A CN115651553 A CN 115651553A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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- Y02E60/10—Energy storage using batteries
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Abstract
The invention relates to the technical field of adhesive tapes, and discloses a high-holding-adhesion hot-melt pressure-sensitive foam adhesive tape for lithium battery packaging and a preparation method thereof. The adhesive tape is characterized in that the adhesive tape is sequentially provided with a foam substrate layer and a high-holding-viscosity hot-melt pressure-sensitive adhesive layer from outside to inside, and the high-holding-viscosity hot-melt pressure-sensitive adhesive layer comprises the following substances in parts by weight: 60-120 parts of thermoplastic elastomer, 60-180 parts of tackifying resin, 20-80 parts of softener, 20-80 parts of silicone resin, 1-5 parts of coupling agent and 2-20 parts of antioxidant; according to the invention, the high-holding-strength hot-melt pressure-sensitive adhesive is directly spot-coated or sprayed on the foam base material by using the hot-melt coating equipment, so that the environmental use requirement of the lithium battery is met, and automatic large-batch precise fitting can be realized.
Description
Technical Field
The invention relates to the technical field of adhesive tapes, in particular to a high-holding-adhesion hot-melt pressure-sensitive foam adhesive tape for lithium battery packaging and a preparation method thereof.
Background
Along with the application of lithium batteries, especially power lithium batteries is more and more extensive, in order to protect the safety in utilization of the lithium batteries, the foam adhesive tape is used for shock absorption and buffering when the power lithium batteries are packaged. At present, the foam adhesive tape is used in a mode of adhering foam with a solvent type double-sided adhesive tape or coating a solvent type pressure-sensitive adhesive on release paper to be compounded on the foam, and then, die cutting is carried out according to the size requirement, and then, manual sticking is carried out. The above scheme has the following defects: 1. the solvent-based pressure-sensitive adhesive needs to use a large amount of solvent in the production and use processes; 2. the processes of glue making, coating, drying, rewinding, die cutting, sticking and the like are required, and the working procedures are complex; 3. the release paper needs to be manually stripped and removed in the lithium battery packaging and pasting process, the pasting position error is large, and automatic continuous production is difficult to realize. Therefore, improvement of the above-described problems is required.
Disclosure of Invention
Aiming at the problems, the invention provides a high-holding-adhesion hot-melt pressure-sensitive foam adhesive tape for lithium battery packaging and a preparation method thereof. The adhesive tape sequentially comprises a foam base material layer and a high-holding-adhesion hot-melt pressure-sensitive adhesive layer from outside to inside, and the preparation method comprises the following steps:
1) Cutting the foam base material layer into pieces with the width of 10-200 mm, wherein the winding length is 10-500 m;
2) And (2) coating high-holding-viscosity hot-melt pressure-sensitive adhesive on one side or two sides of the foam base material layer in the step 1). The coating thickness is 0.040-0.100 mm, preferably 0.050-0.070 mm. The coating mode adopts spray coating, point coating or blade coating, and preferably spray coating.
Further, the foam base material layer is selected from one of PE foaming material, PP foaming material, EVA foaming material, EPDM foaming material and CR foaming material, and the thickness is 0.5-10 mm; the foaming multiplying power is 5 to 30 times; EVA is preferably foamed, the thickness is 2mm, and the foaming ratio is 14 times.
In the step 2), the high-holding-strength hot-melt pressure-sensitive adhesive layer comprises the following substances in parts by weight:
the preparation method of the high-holding-viscosity hot-melt pressure-sensitive adhesive comprises the following steps:
(1) grinding the silicon resin, wherein the grain diameter after grinding is 0.1-3 um;
(2) adding a softening agent, an antioxidant, silicon resin and a coupling agent into a hot-melting stirring kettle, and fully and uniformly stirring;
(3) heating to 140-180 ℃, adding tackifying resin, and stirring until the resin is completely dissolved;
(4) heating to 200-220 ℃, adding the thermoplastic elastomer in batches, and stirring until the thermoplastic elastomer is completely dissolved uniformly;
(5) vacuumizing to remove bubbles, pressurizing while the pressure is hot, discharging, and naturally cooling to room temperature to obtain the high-viscosity hot-melt pressure-sensitive adhesive.
The processes (2), (3) and (4) are all carried out under the protection of nitrogen.
Wherein the thermoplastic elastomer is one or more of SIS, SBS, SEBS or modified substances thereof, preferably SIS, and the styrene content of the thermoplastic elastomer is 18-30%; the tackifying resin is one or more of hydrogenated and non-hydrogenated petroleum resin and terpene resin, rosin resin, preferably terpene resin and petroleum resin; the softening agent is one or more of naphthenic oil, polybutadiene and polyisoprene, and preferably naphthenic oil KN4010. The silicone resin is one or more of methyl MQ silicone resin and vinyl MQ silicone resin, preferably methyl MQ silicone resin, and has M/Q value of 0.75-0.85. The coupling agent is one or more of silane coupling agents KH-550, KH-560 and KH-570, preferably KH-560. The antioxidant is one or more of sterically hindered phenol, phosphite ester and sulfur-containing synergist, preferably antioxidant 1010 and antioxidant 168.
Compared with the prior art, the invention has the beneficial effects that:
the hot melt coating equipment is used for directly point coating or spraying the high-pressure-sensitive adhesive on the foam base material, so that the environmental use requirement of the lithium battery is met, and automatic large-batch accurate lamination can be realized.
Detailed Description
The present invention is described below with reference to examples, which are provided for illustration only and are not intended to limit the scope of the present invention.
Example 1
A high-adhesion hot-melt pressure-sensitive foam adhesive tape for lithium battery packaging and a preparation method thereof comprise the following steps:
1. preparing a base material foam layer.
Cutting EVA foam with the thickness being 14 times that of the foam base material layer and 2mm into the width of 10mm, wherein the winding length is 10m;
2. and preparing the high-holding-viscosity hot-melt pressure-sensitive adhesive.
The raw materials of the material comprise the following components (in parts by weight):
60 parts of thermoplastic elastomer (Keteng company, D1164P, styrene content 29%), 60 parts of terpene resin (Jiangxi Mashan resin, T-100), 20 parts of softener (Kematy petroleum in Xinjiang, KN 4010), 20 parts of silicone resin (SH-5201P in New Sihai chemical industry in Hubei), 1 part of coupling agent (KH-560) and 2 parts of antioxidant (antioxidant 1010).
Further, the preparation method of the high-holding-viscosity hot-melt pressure-sensitive adhesive comprises the following steps:
(1) Grinding the silicon resin, wherein the grain size of the ground silicon resin is 0.1um;
(2) Adding the naphthenic oil, the antioxidant, the silicon resin and the coupling agent into a hot-melting stirring kettle according to the parts by weight, and fully and uniformly stirring;
(3) Heating to 140 ℃, adding tackifying resin, and stirring until the resin is completely dissolved;
(4) Heating to 200 ℃, adding the thermoplastic elastomer in batches, and stirring until the thermoplastic elastomer is completely dissolved uniformly;
(5) Vacuumizing to remove bubbles, pressurizing while the pressure is hot, discharging, and naturally cooling to room temperature to obtain the high-viscosity hot-melt pressure-sensitive adhesive.
Further, the reaction steps (2) to (4) are all protected by nitrogen.
3. And (5) coating by using an adhesive tape.
1) And (3) placing the high-holding-viscosity hot-melt pressure-sensitive adhesive in hot-melt adhesive coating equipment, wherein the coating mode is spraying, and the adhesive coating thickness is 0.050mm.
Example 2
A high-adhesion hot-melt pressure-sensitive foam adhesive tape for lithium battery packaging and a preparation method thereof comprise the following steps:
1. preparing a base material foam layer.
Cutting 14 times of 2mm EVA foam on the foam substrate layer into pieces with the width of 50mm, and winding the pieces with the length of 100m;
2. and preparing the high-holding-viscosity hot-melt pressure-sensitive adhesive.
The raw materials of the material comprise the following components (in parts by weight):
100 parts of thermoplastic elastomer (ba ling petrochemical, YH-1209, styrene content 29%), 140 parts of petroleum resin (Shanghai Kingson petroleum resin, 1401), 40 parts of softener (Xinjiang Clay Petroleum, KN 4010), 60 parts of silicone resin (Hubei Xin Sihai chemical SH-5201P), 3 parts of coupling agent (KH-560) and 10 parts of antioxidant (antioxidant 168).
Further, the preparation method of the high-holding-viscosity hot-melt pressure-sensitive adhesive comprises the following steps:
(1) Grinding the silicon resin, wherein the grain diameter of the ground silicon resin is 1um;
(2) Adding naphthenic oil, an antioxidant, silicon resin and a coupling agent into a hot-melt stirring kettle according to the parts by weight, and fully and uniformly stirring;
(3) Heating to 160 ℃, adding tackifying resin, and stirring until the resin is completely dissolved;
(4) Heating to 200 ℃, adding the thermoplastic elastomer in batches, and stirring until the thermoplastic elastomer is completely dissolved uniformly;
(5) Vacuumizing to remove bubbles, pressurizing while the pressure is hot, discharging, and naturally cooling to room temperature to obtain the high-viscosity hot-melt pressure-sensitive adhesive.
Further, the reaction steps (2) to (4) are all protected by nitrogen.
3. And (5) coating by using an adhesive tape.
1) And (3) placing the high-holding-viscosity hot-melt pressure-sensitive adhesive in hot-melt adhesive coating equipment, wherein the coating mode is spraying, and the adhesive coating thickness is 0.060mm.
Example 3
A high-adhesion hot-melt pressure-sensitive foam adhesive tape for lithium battery packaging and a preparation method thereof comprise the following steps:
1. preparing a base material foam layer.
Cutting 14 times of 3mm EVA foam on the foam substrate layer into pieces with the width of 200mm, and winding the pieces with the length of 500m;
2. and preparing the high-holding-viscosity hot-melt pressure-sensitive adhesive.
The raw materials of the material comprise the following components (in parts by weight):
120 parts of thermoplastic elastomer (Japanese Raynaud 3450, styrene content 19%), 60 parts of terpene resin (Jiangxi Mashan resin, T-100), 120 parts of petroleum resin (Shanghai Kingson petroleum resin, 1401), 80 parts of softener (Xinjiang Crayayai petroleum, KN 4010), 80 parts of silicone resin (Hubei Xin Sihai chemical engineering SH-5201P), 2 parts of coupling agent (KH-560) and 20 parts of antioxidant (10 parts of antioxidant 1010 and 10 parts of antioxidant 168).
Further, the preparation method of the high-holding-viscosity hot-melt pressure-sensitive adhesive comprises the following steps:
(1) Grinding the silicon resin, wherein the grain size of the ground silicon resin is 3um;
(2) Adding naphthenic oil, an antioxidant, silicon resin and a coupling agent into a hot-melt stirring kettle according to the parts by weight, and fully and uniformly stirring;
(3) Heating to 160 ℃, adding tackifying resin, and stirring until the resin is completely dissolved;
(4) Heating to 220 ℃, adding the thermoplastic elastomer in batches, and stirring until the thermoplastic elastomer is completely dissolved uniformly;
(5) Vacuumizing to remove bubbles, pressurizing while the pressure is hot, discharging, and naturally cooling to room temperature to obtain the high-viscosity hot-melt pressure-sensitive adhesive.
Further, the reaction steps (2) to (4) are all protected by nitrogen.
3. And (5) coating by using an adhesive tape.
1) And (3) placing the high-holding-viscosity hot-melt pressure-sensitive adhesive in hot-melt adhesive coating equipment, wherein the coating mode is spraying, and the adhesive coating thickness is 0.070mm.
Example 4
A high-adhesion hot-melt pressure-sensitive foam adhesive tape for lithium battery packaging and a preparation method thereof comprise the following steps:
1. preparing a base material foam layer.
Cutting 14 times of 2mm EVA foam on the foam substrate layer into pieces with the width of 50mm, and winding the pieces with the length of 100m;
2. and preparing the high-holding-viscosity hot-melt pressure-sensitive adhesive.
The raw materials of the material comprise the following components (in parts by weight):
80 parts of thermoplastic elastomer (Ningbo Jinhaichen photochemical, JH-8291, styrene content of 29%), 80 parts of terpene resin (Jiangxi Mashan resin, T-100), 40 parts of petroleum resin (American Exxon, 5600), 60 parts of softener (Xinjiang Crayai Petroleum, KN 4010), 40 parts of silicone resin (Hubei Xin Sihai chemical SH-5201P), 5 parts of coupling agent (KH-560) and 12 parts of antioxidant (8 parts of antioxidant 1010,4 and antioxidant 168).
Further, the preparation method of the high-holding-viscosity hot-melt pressure-sensitive adhesive comprises the following steps:
(1) Grinding the silicon resin, wherein the grain size of the ground silicon resin is 2um;
(2) Adding naphthenic oil, an antioxidant, silicon resin and a coupling agent into a hot-melt stirring kettle according to the parts by weight, and fully and uniformly stirring;
(3) Heating to 160 ℃, adding tackifying resin, and stirring until the resin is completely dissolved;
(4) Heating to 220 ℃, adding the thermoplastic elastomer in batches, and stirring until the thermoplastic elastomer is completely dissolved uniformly;
(5) Vacuumizing to remove bubbles, pressurizing while the pressure is hot, discharging, and naturally cooling to room temperature to obtain the high-viscosity hot-melt pressure-sensitive adhesive.
Further, the reaction steps (2) to (4) are all protected by nitrogen.
3. And (5) coating by using an adhesive tape.
1) And (3) placing the high-holding-viscosity hot-melt pressure-sensitive adhesive in hot-melt adhesive coating equipment, wherein the coating mode is spraying, and the adhesive coating thickness is 0.065mm.
Comparative example 1
Comprises the following steps:
1. preparing a base material foam layer.
Cutting EVA foam with the thickness being 14 times that of the foam base material layer and 2mm into the width of 10mm, wherein the winding length is 10m;
2. and preparing the high-holding-viscosity hot-melt pressure-sensitive adhesive.
The raw materials of the material comprise the following components (in parts by weight):
60 parts of thermoplastic elastomer (Keteng company, D1164P, styrene content 29%), 60 parts of terpene resin (Jiangxi Mashan resin, T-100), 20 parts of softener (Xinjiang Claritya petroleum, KN 4010) and 2 parts of antioxidant (antioxidant 1010).
Further, the preparation method of the high-holding-viscosity hot-melt pressure-sensitive adhesive comprises the following steps:
(1) Adding naphthenic oil and an antioxidant into a hot-melt stirring kettle according to the parts by weight, and fully and uniformly stirring;
(2) Heating to 140 ℃, adding tackifying resin, and stirring until the resin is completely dissolved;
(3) Heating to 200 ℃, adding the thermoplastic elastomer in batches, and stirring until the thermoplastic elastomer is completely dissolved uniformly;
(4) Vacuumizing to remove bubbles, pressurizing while the pressure is hot, discharging, and naturally cooling to room temperature to obtain the high-viscosity hot-melt pressure-sensitive adhesive.
Further, the reaction steps (2) to (4) are all protected by nitrogen.
3. And (5) coating by using an adhesive tape.
1) And (3) placing the hot-melt pressure-sensitive adhesive in hot-melt adhesive coating equipment, wherein the coating mode is spraying, and the adhesive coating thickness is 0.050mm.
The above comparative example 1 was identical to example 1 except that the silicone resin and the silane coupling agent were not added.
Comparative example 2
Comprises the following steps:
1. preparing a base material foam layer.
The EVA foam with the thickness being 14 times that of the foam substrate layer and 2mm is cut into the width of 50mm, and the winding length is 100m.
2. And preparing the high-holding-viscosity hot-melt pressure-sensitive adhesive.
The raw materials of the material comprise the following components (in parts by weight):
100 parts of thermoplastic elastomer (ba ling petrochemical, YH-1209, styrene content 29%), 140 parts of petroleum resin (Shanghai King-Sen petroleum resin, 1401), 40 parts of softener (Xinjiang Clay petroleum, KN 4010) and 10 parts of antioxidant (antioxidant 168).
Further, the preparation method of the high-holding-viscosity hot-melt pressure-sensitive adhesive comprises the following steps:
(1) Adding naphthenic oil and an antioxidant into a hot-melt stirring kettle according to the parts by weight, and fully and uniformly stirring;
(2) Heating to 160 ℃, adding tackifying resin, and stirring until the resin is completely dissolved;
(3) Heating to 200 ℃, adding the thermoplastic elastomer in batches, and stirring until the thermoplastic elastomer is completely dissolved uniformly;
(4) Vacuumizing to remove bubbles, pressurizing to discharge while the pressure is hot, and naturally cooling to room temperature to obtain the high-viscosity hot-melt pressure-sensitive adhesive.
Further, the reaction steps (2) to (4) are all protected by nitrogen.
3. And (5) coating by using an adhesive tape.
1) And (3) placing the high-holding-viscosity hot-melt pressure-sensitive adhesive in hot-melt adhesive coating equipment, wherein the coating mode is spraying, and the adhesive coating thickness is 0.060mm.
The above comparative example 2 was the same as example 2 except that the silicone resin and the silane coupling agent were not added.
Comparative example 3
Comprises the following steps:
1. preparing a base material foam layer.
The EVA foam with the thickness being 14 times that of the foam substrate layer and 2mm is cut into the width of 50mm, and the winding length is 100m.
3. And (6) gluing with an adhesive tape.
Double-sided tape (3M, model 9448) was attached to the foam.
Testing
The following tests were carried out on the foam tapes obtained in examples 1 to 4 and comparative examples 1 to 3:
(1) 180 ° peel strength: the test was carried out according to method 1 of GB/T2792-2014 test method for peel strength of adhesive tapes.
(2) High-temperature viscosity retention: the test was carried out according to method G of test method for peel strength of adhesive tape GB/T4851-2014, the test temperature was 80 ℃, the test length was 25mm, the test width was 25mm, the mass of the test weight was 1000 + -5G, and the test result was the time at which the weight dropped.
(3) Shear strength: the test was carried out according to method of shear strength test (adhesive side to back) of pressure-sensitive adhesive tape in GB 7754-1987 at 23 + -2 ℃.
(4) High-temperature shear strength: the test is carried out according to the test method of shear strength of pressure-sensitive adhesive tapes (adhesive side to back) of GB 7754-1987, and the test temperature is 80 +/-2 ℃.
The results of the above tests are shown in table 1.
TABLE 1 comparison of the properties of foam tapes of examples 1 to 4 and comparative examples 1 to 3
The test results in table 1 show that the example 2 has better comprehensive performance and can be used as a better example of the application, and the high-sustained-adhesion hot-melt pressure-sensitive foam adhesive tape for lithium battery packaging can meet the environmental use requirements of lithium batteries.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (8)
1. The utility model provides a lithium cell encapsulation is with high cotton adhesive tape of hot melt pressure sensitive type bubble which holds, its characterized in that, the adhesive tape outside-in is bubble cotton substrate layer, holds in proper order and glues hot melt pressure sensitive adhesive layer, it includes the material of following parts by weight to hold to glue hot melt pressure sensitive adhesive layer highly:
the foam base material layer is one of PE foaming materials, PP foaming materials, EVA foaming materials, EPDM foaming materials and CR foaming materials, the thickness of the foam base material layer is 0.5-10 mm, and the foaming ratio is 5-30 times.
2. The high-adhesion hot-melt pressure-sensitive foam adhesive tape for lithium battery encapsulation according to claim 1, wherein the silicone resin is one or more of methyl MQ silicone resin and vinyl MQ silicone resin.
3. The high-adhesion hot-melt pressure-sensitive foam adhesive tape for lithium battery encapsulation according to claim 1, wherein the coupling agent is one or more of silane coupling agents KH-550, KH-560 and KH-570.
4. The high-holding-adhesion hot-melt pressure-sensitive foam adhesive tape for lithium battery encapsulation according to claim 1, wherein the thermoplastic elastomer is one or more of SIS, SBS, SEBS or a modification thereof.
5. The high-adhesion hot-melt pressure-sensitive foam adhesive tape for lithium battery encapsulation as claimed in claim 1, wherein the thermoplastic elastomer is SIS with a styrene content of 18-30%.
6. The high-adhesion hot-melt pressure-sensitive foam adhesive tape for lithium battery encapsulation according to claim 1, wherein the tackifying resin is one or more of hydrogenated and unhydrogenated petroleum resin and terpene resin, rosin resin; the softening agent is one or more of naphthenic oil, polybutadiene and polyisoprene, and the antioxidant is one or more of sterically hindered phenol, phosphite ester and sulfur-containing synergist.
7. The preparation method of the high-holding-viscosity hot-melt pressure-sensitive foam adhesive tape for lithium battery packaging as claimed in claim 1, characterized by comprising the following steps:
1) Cutting the foam base material layer into pieces with the width of 10-200 mm and the winding length of 10-500 m;
2) Coating the high-adhesion hot-melt pressure-sensitive adhesive on one side or two sides of the foam base material layer in the step 1), wherein the coating thickness is 0.040-0.100 mm, and the coating mode adopts spray coating, spot coating or blade coating.
8. The preparation method of claim 7, wherein the preparation method of the high-tack hot-melt pressure-sensitive adhesive comprises the following steps:
(1) grinding the silicon resin, wherein the grain diameter after grinding is 0.1-3 um;
(2) adding a softening agent, an antioxidant, silicon resin and a coupling agent into a hot-melting stirring kettle, and fully and uniformly stirring;
(3) heating to 140-180 ℃, adding tackifying resin, and stirring until the resin is completely dissolved;
(4) heating to 200-220 ℃, adding the thermoplastic elastomer in batches, and stirring until the thermoplastic elastomer is completely dissolved uniformly;
(5) vacuumizing to remove bubbles, pressurizing while the pressure is hot, discharging, and naturally cooling to room temperature to obtain the high-viscosity hot-melt pressure-sensitive adhesive.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211331525.4A CN115651553A (en) | 2022-10-28 | 2022-10-28 | High-adhesion-holding hot-melt pressure-sensitive foam adhesive tape for lithium battery packaging and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211331525.4A CN115651553A (en) | 2022-10-28 | 2022-10-28 | High-adhesion-holding hot-melt pressure-sensitive foam adhesive tape for lithium battery packaging and preparation method thereof |
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| CN115651553A true CN115651553A (en) | 2023-01-31 |
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