CN114122580B - Nylon membrane for packaging new energy lithium battery and manufacturing method thereof - Google Patents
Nylon membrane for packaging new energy lithium battery and manufacturing method thereof Download PDFInfo
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- CN114122580B CN114122580B CN202210097139.7A CN202210097139A CN114122580B CN 114122580 B CN114122580 B CN 114122580B CN 202210097139 A CN202210097139 A CN 202210097139A CN 114122580 B CN114122580 B CN 114122580B
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- 239000012528 membrane Substances 0.000 title claims abstract description 45
- 239000004677 Nylon Substances 0.000 title claims abstract description 43
- 229920001778 nylon Polymers 0.000 title claims abstract description 43
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 28
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 28
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 25
- 238000004806 packaging method and process Methods 0.000 title claims abstract description 21
- 239000000463 material Substances 0.000 claims abstract description 75
- 239000002344 surface layer Substances 0.000 claims abstract description 56
- 239000012792 core layer Substances 0.000 claims abstract description 30
- 229920006284 nylon film Polymers 0.000 claims abstract description 21
- 238000004804 winding Methods 0.000 claims abstract description 6
- 230000000149 penetrating effect Effects 0.000 claims abstract 2
- 239000011347 resin Substances 0.000 claims description 69
- 229920005989 resin Polymers 0.000 claims description 69
- 239000005543 nano-size silicon particle Substances 0.000 claims description 35
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims description 35
- 229910010271 silicon carbide Inorganic materials 0.000 claims description 35
- 229920003231 aliphatic polyamide Polymers 0.000 claims description 31
- 238000002156 mixing Methods 0.000 claims description 30
- 239000000919 ceramic Substances 0.000 claims description 29
- 239000002994 raw material Substances 0.000 claims description 28
- 239000012752 auxiliary agent Substances 0.000 claims description 20
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 14
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 claims description 14
- 239000005977 Ethylene Substances 0.000 claims description 14
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 claims description 14
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 14
- 238000006243 chemical reaction Methods 0.000 claims description 14
- 239000000203 mixture Substances 0.000 claims description 14
- 239000002243 precursor Substances 0.000 claims description 14
- 229920002554 vinyl polymer Polymers 0.000 claims description 14
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 claims description 13
- 238000000034 method Methods 0.000 claims description 10
- 239000005995 Aluminium silicate Substances 0.000 claims description 7
- 229910021532 Calcite Inorganic materials 0.000 claims description 7
- UAUDZVJPLUQNMU-UHFFFAOYSA-N Erucasaeureamid Natural products CCCCCCCCC=CCCCCCCCCCCCC(N)=O UAUDZVJPLUQNMU-UHFFFAOYSA-N 0.000 claims description 7
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 7
- 235000012211 aluminium silicate Nutrition 0.000 claims description 7
- 150000001408 amides Chemical class 0.000 claims description 7
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 7
- 238000001816 cooling Methods 0.000 claims description 7
- GUJOJGAPFQRJSV-UHFFFAOYSA-N dialuminum;dioxosilane;oxygen(2-);hydrate Chemical compound O.[O-2].[O-2].[O-2].[Al+3].[Al+3].O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O GUJOJGAPFQRJSV-UHFFFAOYSA-N 0.000 claims description 7
- FPAFDBFIGPHWGO-UHFFFAOYSA-N dioxosilane;oxomagnesium;hydrate Chemical compound O.[Mg]=O.[Mg]=O.[Mg]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O FPAFDBFIGPHWGO-UHFFFAOYSA-N 0.000 claims description 7
- 238000001035 drying Methods 0.000 claims description 7
- UAUDZVJPLUQNMU-KTKRTIGZSA-N erucamide Chemical compound CCCCCCCC\C=C/CCCCCCCCCCCC(N)=O UAUDZVJPLUQNMU-KTKRTIGZSA-N 0.000 claims description 7
- 238000001125 extrusion Methods 0.000 claims description 7
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 claims description 7
- 229910052901 montmorillonite Inorganic materials 0.000 claims description 7
- FATBGEAMYMYZAF-KTKRTIGZSA-N oleamide Chemical compound CCCCCCCC\C=C/CCCCCCCC(N)=O FATBGEAMYMYZAF-KTKRTIGZSA-N 0.000 claims description 7
- FATBGEAMYMYZAF-UHFFFAOYSA-N oleicacidamide-heptaglycolether Natural products CCCCCCCCC=CCCCCCCCC(N)=O FATBGEAMYMYZAF-UHFFFAOYSA-N 0.000 claims description 7
- 235000012239 silicon dioxide Nutrition 0.000 claims description 7
- 239000000377 silicon dioxide Substances 0.000 claims description 7
- 238000003756 stirring Methods 0.000 claims description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 7
- 239000010456 wollastonite Substances 0.000 claims description 7
- 229910052882 wollastonite Inorganic materials 0.000 claims description 7
- 229940037312 stearamide Drugs 0.000 claims description 6
- 229920001577 copolymer Polymers 0.000 claims description 4
- 239000002131 composite material Substances 0.000 abstract description 5
- 239000004033 plastic Substances 0.000 abstract description 5
- 229920003023 plastic Polymers 0.000 abstract description 5
- 238000000926 separation method Methods 0.000 abstract description 3
- 230000004888 barrier function Effects 0.000 abstract description 2
- 239000010410 layer Substances 0.000 description 12
- 229910052782 aluminium Inorganic materials 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 3
- 238000005538 encapsulation Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 239000012785 packaging film Substances 0.000 description 2
- 229920006280 packaging film Polymers 0.000 description 2
- 238000007792 addition Methods 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000005030 aluminium foil Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000005025 cast polypropylene Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052573 porcelain Inorganic materials 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- -1 vinyl dioleamide Chemical compound 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/116—Primary casings; Jackets or wrappings characterised by the material
- H01M50/124—Primary casings; Jackets or wrappings characterised by the material having a layered structure
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H18/00—Winding webs
- B65H18/08—Web-winding mechanisms
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H18/00—Winding webs
- B65H18/28—Wound package of webs
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H19/00—Changing the web roll
- B65H19/22—Changing the web roll in winding mechanisms or in connection with winding operations
- B65H19/30—Lifting, transporting, or removing the web roll; Inserting core
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/18—Manufacture of films or sheets
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/116—Primary casings; Jackets or wrappings characterised by the material
- H01M50/121—Organic material
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2377/00—Characterised by the use of polyamides obtained by reactions forming a carboxylic amide link in the main chain; Derivatives of such polymers
- C08J2377/02—Polyamides derived from omega-amino carboxylic acids or from lactams thereof
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2477/00—Characterised by the use of polyamides obtained by reactions forming a carboxylic amide link in the main chain; Derivatives of such polymers
- C08J2477/02—Polyamides derived from omega-amino carboxylic acids or from lactams thereof
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/34—Silicon-containing compounds
-
- 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
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- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
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- Health & Medical Sciences (AREA)
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- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
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Abstract
The invention discloses a nylon membrane for packaging a new energy lithium battery and a manufacturing method thereof, belonging to the field of lithium battery materials and comprising a core layer, wherein a first surface layer and a second surface layer are respectively and fixedly connected with two sides of the core layer, through holes are arranged on the core layer, the first surface layer and the second surface layer in a penetrating way, stress grooves are arranged among the through holes on the first surface layer, a winding drum is wound and sleeved on the bottom wall of the surface layer II, a fixed block is fixedly sleeved on the inner surface of the winding drum, the middle axis of the fixed block is provided with a clamping groove, and the side wall of the clamping groove is provided with a corrugated groove, the invention can avoid the barrier of nylon membrane separation, is convenient for the subsequent cutting of the aluminum-plastic composite membrane production, and achieves the purpose of improving the production efficiency, and the difference between the longitudinal tensile strength and the transverse tensile strength of the nylon film is small, so that the nylon film can be prevented from being broken during cold stamping forming, and the purpose of effectively protecting the battery is achieved.
Description
Technical Field
The invention relates to the field of lithium battery materials, in particular to a nylon membrane for packaging a new energy lithium battery and a manufacturing method thereof.
Background
The soft package lithium cell is a new forms of energy lithium cell that uses plastic-aluminum complex film encapsulation, has the security high and the big advantage of energy density, is one of the development direction of future lithium cell, and the plastic-aluminum encapsulated film of its use is formed by nylon membrane, aluminium foil and CPP membrane are compound, because nylon membrane tensile strength is high, at the plastic-aluminum encapsulated film in cold stamping forming process, produces great deformation, and the nylon membrane plays and prevents that the plastic-aluminum membrane from breaking, thereby the effect of protection battery.
Through search, chinese patent No. CN200610086130.7 discloses a composite nylon diaphragm and a method for manufacturing the same, wherein although the tensile strength is high, the difference between the longitudinal and transverse tensile strengths is large, when the composite nylon diaphragm is used for cold stamping of an aluminum-plastic packaging film, the aluminum-plastic packaging film can still break, the battery cannot be effectively protected, and a common nylon film is not easy to cut, so that the separation of the nylon film is difficult, which brings inconvenience to the subsequent production of the aluminum-plastic composite film and brings the problem of the defect of the nylon film.
Disclosure of Invention
The invention aims to solve the defects in the prior art and provides a nylon membrane for packaging a new energy lithium battery and a manufacturing method thereof.
In order to achieve the purpose, the invention adopts the following technical scheme:
the utility model provides a nylon membrane is used in encapsulation of new forms of energy lithium cell, includes the sandwich layer, the both sides of sandwich layer rigid coupling respectively have top layer one and top layer two, and all link up on sandwich layer, top layer one and the top layer two and be provided with
The through-hole, stress groove has been seted up between the through-hole on the top layer one, the winding has cup jointed the reel on the diapire on top layer two, the internal surface of reel is fixed to cup joint has the fixed block, the draw-in groove has been seted up on the axis of fixed block, stupefied groove has been seted up on the lateral wall of draw-in groove.
Further, stupefied groove evenly distributed about the axis of draw-in groove, the length of sandwich layer, top layer one and top layer two between the through-hole all accords with the requirement of lithium cell encapsulation.
A manufacturing method of a nylon membrane for packaging a new energy lithium battery comprises the following raw materials by weight: 19.84 to 24.87 parts of PA6 resin, 0.13 to 0.16 part of anti-adhesion additive,
75-80 parts of aliphatic nylon resin and 5-10 parts of nano silicon carbide; 5-10 parts of nano silicon carbide is synthesized by the following raw materials by mol: 1-2mol of ethylene gas and 1-2.12mol of monosilane; the manufacturing method of the nylon membrane comprises the following specific steps:
the method comprises the following steps: preparing 5-10 parts of nano silicon carbide: preheating a ceramic reactor to the temperature of 1000-2000 ℃, mixing 1-2mol of ethylene gas with 1-2.12mol of monosilane to obtain a gas reaction precursor, and introducing the gas reaction precursor into the preheated ceramic reactor to obtain nano silicon carbide;
step two: 19.84-24.87 parts of modified PA6 resin: mixing and stirring 19.84-24.87 parts of PA6 resin and 5-10 parts of nano silicon carbide to obtain a mixed raw material, putting the mixed raw material into an extruder granulator, and performing extrusion, water cooling, material cutting and drying treatment to obtain modified PA6 resin;
step three: preparing a first surface layer and a second surface layer: mixing the modified PA6 resin and 0.13-0.16 part of anti-adhesion auxiliary agent in the second step in proportion, and respectively placing the mixture in two extruders to obtain a first surface layer material and a second surface layer material;
step four: preparing a core layer: selecting 75-80 parts of aliphatic nylon resin according to requirements, and then mixing
Mixing the uniform materials, and placing the materials in a third extruder to obtain a core layer material;
step five: preparing a film: and (3) placing the surface layer I material and the surface layer II material in the third step on two sides of the core layer material in the fourth step, gathering the materials into a die head together, co-extruding the materials to a cold roller to form a thick sheet, and stretching the thick sheet in the longitudinal direction and the transverse direction to obtain the nylon film.
Further, the anti-adhesion auxiliary agent is one or more of calcium carbonate, talcum powder, silicon dioxide, wollastonite, calcite, montmorillonite, kaolin, vinyl bis-oleamide, vinyl bis-stearamide, oleamide, erucamide and polar amide wax, and the aliphatic nylon resin is a copolymer or a blend of one or more of PA6, PA66, PA12 and PA 1212.
Further, the stretch ratio in both the longitudinal direction and the transverse direction in step five is 2.5 to 3.0.
Further, the pressure of the ceramic reactor in the step one is 2-5 atmospheric pressures, and the material of the ceramic reactor is alumina.
Further, the nylon film in the fifth step is 12-25 μm, and the surface temperature of the cold roll in the fifth step is-60 ℃ to-5 ℃.
Compared with the prior art, the invention has the beneficial effects that:
1. according to the invention, through the matching of the through hole and the stress groove, the nylon membrane can be effectively separated, the barrier of nylon membrane separation is avoided, the cutting of the subsequent production of the aluminum-plastic composite membrane is facilitated, the purpose of improving the production efficiency is achieved, and meanwhile, the fixing block can be quickly connected with the transmission shaft in a matching way with the clamping groove, so that the winding drum is simple and convenient to disassemble and install, and the collection of the nylon membrane is facilitated.
2. The tensile nominal strain of the nylon film is obviously improved and more uniform in the MD direction and the TD direction, and the tensile strength in the MD direction is obviously improved, so that the nylon film
The difference between the longitudinal tensile strength and the transverse tensile strength is small, the fracture can be avoided during cold stamping forming, and the purpose of effectively protecting the battery is achieved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention.
Fig. 1 is a schematic view of the overall structure of a nylon membrane for packaging a new energy lithium battery provided by the invention;
fig. 2 is an enlarged view of a part a of the structure in fig. 1 of a nylon membrane for packaging a new energy lithium battery according to the present invention;
fig. 3 is a schematic structural diagram of a fixing block of a nylon film for packaging a new energy lithium battery provided by the invention;
fig. 4 is a flowchart of a method for manufacturing a nylon film for packaging a new energy lithium battery according to the present invention.
In the figure: 1. a core layer; 2. a first surface layer; 3. a second surface layer; 4. a through hole; 5. a stress slot; 6. A reel; 7. a fixed block; 8. a clamping groove.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
Example 1:
referring to fig. 4, the present invention provides a technical solution: a manufacturing method of a nylon membrane for packaging a new energy lithium battery comprises the following raw materials by weight: PA6 resin
19.84 parts of anti-adhesion auxiliary agent, 0.13 part of aliphatic nylon resin and 5 parts of nano silicon carbide; the nano silicon carbide is synthesized by 5 parts by mol of raw materials as follows: 1mol of ethylene gas and 1mol of monosilane; the manufacturing method of the nylon membrane comprises the following specific steps:
the method comprises the following steps: preparing 5 parts of nano silicon carbide: preheating a ceramic reactor to 1000 ℃, mixing 1mol of ethylene gas with 1mol of monosilane to obtain a gas reaction precursor, and introducing the gas reaction precursor into the preheated ceramic reactor to obtain nano silicon carbide;
step two: 19.84 parts of modified PA6 resin: mixing and stirring 19.84 parts of PA6 resin and 5 parts of nano silicon carbide to obtain a mixed raw material, putting the mixed raw material into an extruder granulator, and performing extrusion, water cooling, material cutting and drying treatment to obtain modified PA6 resin;
step three: preparing a first surface layer and a second surface layer: mixing the modified PA6 resin in the step two and 0.13 part of anti-adhesion auxiliary agent in proportion, and respectively placing the mixture in two extruders to obtain a first surface layer material and a second surface layer material;
step four: preparing a core layer: selecting 75 parts of aliphatic nylon resin as required, mixing the aliphatic nylon resin and the aliphatic nylon resin uniformly, and placing the mixture in a third extruder to obtain a core layer material;
step five: preparing a film: placing the first material and the second material in the third step
And co-extruding the two sides of the core layer material in the fourth step into a die head, co-extruding the core layer material into a cold roll to form a thick sheet, and stretching the thick sheet in the longitudinal direction and the transverse direction to obtain the nylon membrane, wherein the anti-adhesion auxiliary agent is one or more of calcium carbonate, talcum powder, silicon dioxide, wollastonite, calcite, montmorillonite, kaolin, vinyl bis-oleamide, vinyl bis-stearamide, oleamide, erucamide and polar amide wax, the aliphatic nylon resin is PA6 resin, the stretching ratios in the longitudinal direction and the transverse direction in the fifth step are 3, the pressure of the ceramic reactor in the first step is 2 atmospheric pressures, the material of the ceramic reactor is alumina, the nylon membrane in the fifth step is 12 microns, and the surface temperature of the cold roll in the fifth step is-60 ℃.
Example 2:
referring to fig. 4, the present invention provides a technical solution: a manufacturing method of a nylon membrane for packaging a new energy lithium battery comprises the following raw materials by weight: PA6 resin 20
The adhesive comprises the following components, 0.14 part of anti-adhesion auxiliary agent, 77 parts of aliphatic nylon resin and 6 parts of nano silicon carbide; the nano silicon carbide is synthesized by 5 parts by mol of raw materials as follows: 1.5mol of ethylene gas and 1.6mol of monosilane; the manufacturing method of the nylon membrane comprises the following specific steps:
the method comprises the following steps: preparing 6 parts of nano silicon carbide: preheating a ceramic reactor to 1000 ℃, mixing 1.5mol of ethylene gas and 1.6mol of monosilane to obtain a gas reaction precursor, and introducing the gas reaction precursor into the preheated ceramic reactor to obtain nano silicon carbide;
step two: 20 parts of modified PA6 resin: mixing and stirring 20 parts of PA6 resin and 6 parts of nano silicon carbide to obtain a mixed raw material, putting the mixed raw material into an extruder granulator, and performing extrusion, water cooling, material cutting and drying treatment to obtain modified PA6 resin;
step three: preparing a first surface layer and a second surface layer: mixing the modified PA6 resin in the step two and 0.14 part of anti-adhesion auxiliary agent in proportion, and respectively placing the mixture in two extruders to obtain a first surface layer material and a second surface layer material;
step four: preparing a core layer: selecting 77 parts of aliphatic nylon resin as required, mixing the materials uniformly, and placing the materials in a third extruder to obtain a core layer material;
step five: preparing a film: placing the surface layer I material and the surface layer II material in the third step on two sides of the core layer material in the fourth step, and then the two materials are converged into a die head together, and are co-extruded to a cold roll to form a thick sheet, and then the thick sheet is stretched in the longitudinal direction and the transverse direction, the nylon membrane is obtained, the anti-adhesion auxiliary agent is one or more of calcium carbonate, talcum powder, silicon dioxide, wollastonite, calcite, montmorillonite, kaolin, vinyl bis-oleamide, vinyl bis-stearamide, oleamide, erucamide and polar amide wax, the aliphatic nylon resin is PA6 resin, the stretching ratio in the longitudinal direction and the transverse direction in the step five is 3, the pressure of the ceramic reactor in the step one is 2 atmospheric pressure, and the material of the ceramic reactor is alumina, the nylon membrane in the fifth step is 12 microns, and the surface temperature of the cold roll in the fifth step is-60 ℃.
Example 3:
referring to fig. 4, the present invention provides a technical solution: a manufacturing method of a nylon membrane for packaging a new energy lithium battery comprises the following raw materials by weight: PA6 resin
19.84 parts of anti-adhesion auxiliary agent, 0.13 part of aliphatic nylon resin and 5 parts of nano silicon carbide; the nano silicon carbide is synthesized by 5 parts by mol of raw materials as follows: 1mol of ethylene gas and 1mol of monosilane; the manufacturing method of the nylon membrane comprises the following specific steps:
the method comprises the following steps: preparing 5 parts of nano silicon carbide: preheating a ceramic reactor to 1000 ℃, mixing 1mol of ethylene gas and 1mol of monosilane to obtain a gas reaction precursor, and then mixing
Introducing the gas reaction precursor into a preheated ceramic reactor to obtain nano silicon carbide;
step two: 19.84 parts of modified PA6 resin: mixing and stirring 19.84 parts of PA6 resin and 5 parts of nano silicon carbide to obtain a mixed raw material, putting the mixed raw material into an extruder granulator, and performing extrusion, water cooling, material cutting and drying treatment to obtain modified PA6 resin;
step three: preparing a first surface layer and a second surface layer: mixing the modified PA6 resin in the step two and 0.13 part of anti-adhesion auxiliary agent in proportion, and respectively placing the mixture in two extruders to obtain a first surface layer material and a second surface layer material;
step four: preparing a core layer: selecting 75 parts of aliphatic nylon resin as required, mixing the aliphatic nylon resin and the aliphatic nylon resin uniformly, and placing the mixture in a third extruder to obtain a core layer material;
step five: preparing a film: placing the surface layer I material and the surface layer II material in the third step on two sides of the core layer material in the fourth step, and then the two materials are converged into a die head together, and are co-extruded to a cold roll to form a thick sheet, and then the thick sheet is stretched in the longitudinal direction and the transverse direction, the nylon membrane is obtained, the anti-adhesion auxiliary agent is one or more of calcium carbonate, talcum powder, silicon dioxide, wollastonite, calcite, montmorillonite, kaolin, vinyl bis-oleamide, vinyl bis-stearamide, oleamide, erucamide and polar amide wax, the aliphatic nylon resin is a copolymer of PA6 and PA66, the stretching ratio in the longitudinal direction and the transverse direction in the step five is 2.9, the pressure of the ceramic reactor in the step one is 2 atmospheric pressure, and the material of the ceramic reactor is alumina, the nylon membrane in the fifth step is 12 microns, and the surface temperature of the cold roll in the fifth step is-60 ℃.
Example 4:
referring to fig. 4, the present invention provides a technical solution: a manufacturing method of a nylon membrane for packaging a new energy lithium battery comprises the following raw materials by weight: 19.84 parts of PA6 resin, 0.18 part of anti-adhesion auxiliary agent, 80 parts of aliphatic nylon resin and 5 parts of nano silicon carbide; the nano silicon carbide is synthesized by 5 parts by mol of raw materials as follows: 1mol of ethylene gas and 1mol of monosilane; the manufacturing method of the nylon membrane comprises the following specific steps:
the method comprises the following steps: preparing 5 parts of nano silicon carbide: preheating a ceramic reactor to 1000 ℃, mixing 1mol of ethylene gas with 1mol of monosilane to obtain a gas reaction precursor, and introducing the gas reaction precursor into the preheated ceramic reactor to obtain nano silicon carbide;
step two: 19.84 parts of modified PA6 resin: mixing and stirring 19.84 parts of PA6 resin and 5 parts of nano silicon carbide to obtain a mixed raw material, putting the mixed raw material into an extruder granulator, and performing extrusion, water cooling, material cutting and drying treatment to obtain modified PA6 resin;
step three: preparing a first surface layer and a second surface layer: mixing the modified PA6 resin in the step two and 0.13 part of anti-adhesion auxiliary agent in proportion, and respectively placing the mixture in two extruders to obtain a first surface layer material and a second surface layer material;
step four: preparing a core layer: selecting 75 parts of aliphatic nylon resin as required, mixing the aliphatic nylon resin and the aliphatic nylon resin uniformly, and placing the mixture in a third extruder to obtain a core layer material;
step five: preparing a film: placing the surface layer material I and the surface layer material II in the step III on two sides of the core layer material in the step IV, collecting the two materials together into a die head, co-extruding the two materials to a cold roll to form a thick sheet, stretching the thick sheet in the longitudinal direction and the transverse direction to obtain the nylon film, wherein the anti-adhesion auxiliary agent is one or more of calcium carbonate, talcum powder, silicon dioxide, wollastonite, calcite, montmorillonite, kaolin, vinyl dioleamide, vinyl distearamide, oleamide, erucamide and polar amide wax, the aliphatic nylon resin is a copolymer of PA6, PA66 and PA1212, the stretching multiplying power in the longitudinal direction and the transverse direction in the step V is 2.9, the pressure of the ceramic reactor in the step I is 2 atmospheric pressures, and the ceramic reactor in the step I is a ceramic reactor with a pressure of 2 atmospheric pressures
The material of the porcelain reactor is alumina, the nylon membrane in the fifth step is 12 microns, and the surface temperature of the cold roll in the fifth step is-60 ℃.
Comparative example 1:
referring to fig. 4, the present invention provides a technical solution: a manufacturing method of a nylon membrane for packaging a new energy lithium battery comprises the following raw materials by weight: PA6 resin
19.84 parts of anti-adhesion auxiliary agent, 0.14 part of aliphatic nylon resin and 5 parts of nano silicon carbide; the nano silicon carbide is synthesized by 5 parts by mol of raw materials as follows: 1mol of ethylene gas and 1mol of monosilane; the manufacturing method of the nylon membrane comprises the following specific steps:
the method comprises the following steps: preparing 5 parts of nano silicon carbide: preheating a ceramic reactor to 1000 ℃, mixing 1mol of ethylene gas with 1mol of monosilane to obtain a gas reaction precursor, and introducing the gas reaction precursor into the preheated ceramic reactor to obtain nano silicon carbide;
step two: 19.84 parts of modified PA6 resin: mixing and stirring 19.84 parts of PA6 resin and 5 parts of nano silicon carbide to obtain a mixed raw material, putting the mixed raw material into an extruder granulator, and performing extrusion, water cooling, material cutting and drying treatment to obtain modified PA6 resin;
step three: preparing a first surface layer and a second surface layer: mixing the modified PA6 resin in the step two and 0.13 part of anti-adhesion auxiliary agent in proportion, and respectively placing the mixture in two extruders to obtain a first surface layer material and a second surface layer material;
step four: preparing a core layer: selecting 75 parts of aliphatic nylon resin as required, mixing the aliphatic nylon resin and the aliphatic nylon resin uniformly, and placing the mixture in a third extruder to obtain a core layer material;
step five: preparing a film: placing the surface layer I material and the surface layer II material in the third step on two sides of the core layer material in the fourth step, merging the two materials into a die head together, co-extruding the two materials to a cold roll to form a thick sheet, and stretching the thick sheet in the longitudinal direction and the transverse direction to obtain the nylon film
The anti-adhesion auxiliary agent is one or more of calcium carbonate, talcum powder, silicon dioxide, wollastonite, calcite, montmorillonite, kaolin, vinyl bis-oleamide, vinyl bis-stearamide, oleamide, erucamide and polar amide wax, the aliphatic nylon resin is PA6 resin, the stretching ratios in the longitudinal direction and the transverse direction in the fifth step are 3.3, the pressure of the ceramic reactor in the first step is 2 atmospheric pressures, the material of the ceramic reactor is alumina, the nylon membrane in the fifth step is 12 microns, and the surface temperature of the cold roll in the fifth step is-60 ℃.
The following data were obtained from the experiments conducted on the nylon membranes of examples 1 to 4 and the nylon membrane of comparative example 1:
as can be seen from the examples 1-4 and the comparative example 1 in the table above, the tensile nominal strain of the nylon film of the present invention is significantly improved and more uniform in the MD direction and the TD direction, and the tensile strength in the MD direction is significantly improved, so that the difference between the longitudinal tensile strength and the transverse tensile strength of the nylon film is small, and the nylon film can be prevented from being broken during cold stamping forming, thereby achieving the purpose of effectively protecting the battery.
In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The foregoing is merely exemplary and illustrative of the present invention and various modifications, additions and substitutions may be made by those skilled in the art to the specific embodiments described without departing from the scope of the invention as defined in the following claims.
Claims (5)
1. The nylon membrane for packaging the new energy lithium battery comprises a core layer (1) and is characterized in that two sides of the core layer (1) are fixedly connected with a first surface layer (2) and a second surface layer (3) respectively, through holes (4) are formed in the core layer (1), the first surface layer (2) and the second surface layer (3) in a penetrating mode, stress grooves (5) are formed among the through holes (4) in the first surface layer (2), a winding drum (6) is wound and sleeved on the bottom wall of the second surface layer (2), a fixing block (7) is fixedly sleeved on the inner surface of the winding drum (6), a clamping groove (8) is formed in the central axis of the fixing block (7), and a rib groove is formed in the side wall of the clamping groove (8);
the corrugated grooves are uniformly distributed about the central axis of the clamping groove (8), and the lengths of the core layer (1), the surface layer I (2) and the surface layer II (3) among the through holes (4) all meet the requirement of lithium battery packaging;
the nylon membrane is prepared from the following raw materials in parts by weight: 19.84-24.87 parts of PA6 resin, 0.13-0.16 part of anti-adhesion auxiliary agent, 75-80 parts of aliphatic nylon resin and 5-10 parts of nano silicon carbide; 5-10 parts of nano silicon carbide comprises the following raw materials in molar weight: 1-2mol of ethylene gas and 1-2.12mol of monosilane; the manufacturing method of the nylon membrane comprises the following specific steps:
the method comprises the following steps: preparing 5-10 parts of nano silicon carbide: preheating a ceramic reactor to the temperature of 1000-2000 ℃, mixing 1-2mol of ethylene gas with 1-2.12mol of monosilane to obtain a gas reaction precursor, and introducing the gas reaction precursor into the preheated ceramic reactor to obtain nano silicon carbide;
step two: 19.84-24.87 parts of modified PA6 resin: mixing and stirring 19.84-24.87 parts of PA6 resin and 5-10 parts of nano silicon carbide to obtain a mixed raw material, putting the mixed raw material into an extruder granulator, and performing extrusion, water cooling, material cutting and drying treatment to obtain modified PA6 resin;
step three: preparing a first surface layer and a second surface layer: mixing the modified PA6 resin and 0.13-0.16 part of anti-adhesion auxiliary agent in the second step in proportion, and respectively placing the mixture in two extruders to obtain a first surface layer material and a second surface layer material;
step four: preparing a core layer: selecting 75-80 parts of aliphatic nylon resin as required, mixing the aliphatic nylon resin and the aliphatic nylon resin uniformly, and placing the mixture in a third extruder to obtain a core layer material;
step five: preparing a film: and (3) placing the surface layer I material and the surface layer II material in the third step on two sides of the core layer material in the fourth step, gathering the materials into a die head together, co-extruding the materials to a cold roller to form a thick sheet, and stretching the thick sheet in the longitudinal direction and the transverse direction to obtain the nylon film.
2. The nylon film for packaging the new energy lithium battery as claimed in claim 1, wherein the anti-adhesion auxiliary agent is one or more of calcium carbonate, talcum powder, silicon dioxide, wollastonite, calcite, montmorillonite, kaolin, vinyl bis-oleamide, vinyl bis-stearamide, oleamide, erucamide and polar amide wax, and the aliphatic nylon resin is a copolymer or a blend of one or more of PA6, PA66, PA12 and PA 1212.
3. The nylon film for packaging a new energy lithium battery as claimed in claim 1, wherein the draw ratio in both the longitudinal and transverse directions in the fifth step is 2.5-3.0.
4. The nylon membrane for packaging a new energy lithium battery as claimed in claim 1, wherein the pressure of the ceramic reactor in the first step is 2-5 atm, and the material of the ceramic reactor is alumina.
5. The nylon film for packaging the new energy lithium battery as claimed in claim 1, wherein the nylon film in the fifth step is 12-25 μm, and the surface temperature of the cold roll in the fifth step is-60 ℃ to-5 ℃.
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