CN106183312B - Lithium battery flexible packaging gas absorption type internal layer co-extrusion film and preparation method thereof - Google Patents
Lithium battery flexible packaging gas absorption type internal layer co-extrusion film and preparation method thereof Download PDFInfo
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- CN106183312B CN106183312B CN201610754826.6A CN201610754826A CN106183312B CN 106183312 B CN106183312 B CN 106183312B CN 201610754826 A CN201610754826 A CN 201610754826A CN 106183312 B CN106183312 B CN 106183312B
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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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Abstract
The present invention is disclosed is packed for gas absorption type internal layer co-extrusion film and preparation method thereof with a kind of lithium battery.Specifically, it is internal layer co-extrusion film that poly-lithium battery internal layer is contacted with polyelectrolyte solution and preparation method thereof.Its main feature is that it is made of successively adsorbent, mucigel, barrier layer, mechanical support layer, hot sealing layer from outside to inside.It is made up of the co-extrusion between the preparation of each layer raw material and neighboring layers.It using the present invention, can avoid that the globality of flexible package is destroyed, leakage happens, improve the security and service life of lithium battery.
Description
Technical field
The present invention relates to a kind of lithium battery flexible packaging materials and preparation method thereof.Specifically, it is poly-lithium battery internal layer
Internal layer co-extrusion film contacted with polyelectrolyte solution and preparation method thereof.
Background technology
Both known about in battery production industry, polymer battery is state-of-the-art secondary cell in the world now, have than
The advantages that energy is high, and charge/discharge rates are fast, progressively substitutes lithium ion battery, applied to mobile phone, laptop, MP3,
In the digital products such as PDA, DV, essential product indispensable in people's Working Life has been increasingly becoming.The security of battery is
The main factor of battery applications is influenced, the ballooning of lithium battery is to influence the principal element of battery security, causes battery
Hydraulic performance decline.Due to lithium polymer battery using clad aluminum plastic film as housing material, it is difficult to bear larger inside gas
Body pressure, therefore, ballooning have increasingly constituted necessary solution factor.
Polymer lithium ion battery electric solution liquid is mostly the very strong organic solvent of burn into permeance property and the lithium salts easily hydrolyzed
Composition, during storage, electrolyte easily by the inner layer film oxidation stratification of lithium ion battery, makes packaging lose integrality, extraneous
Moisture and air infiltration, cause CO in gas2（Carbon dioxide）It dramatically increases, and occurs considerable amount of O simultaneously2（Oxygen
Gas）And N2（Nitrogen）, and the gases such as oxygen enter battery fluid and can lead to problems such as electrolyte that chemical oxidation, swelling occurs, and cause
Ballooning so that polymer Li-ion battery service life is shorter.
Disclosed flexible package inner layer film uses individual layer polyamide barrier layer in the prior art, although barrier property is good,
Tearing strength is poor, toughness deficiency so that easily there is Splitting in the batteries processing technology such as folding, punching press, so as to cause
The globality of flexible package is destroyed.
In addition, in the report for being monolayer-modified polypropylene barrier layer in published flexible package inner layer film, tensile strength,
Tensile strength, corrosion resistance, insulating properties are all preferable.But barrier property is poor, and air-blowing easily occurs, so as to affect lithium-ion electric
The safe to use and service life in pond.Disclosed flexible package inner layer film heat-sealing temperature higher thermal envelope complicated condition in the prior art, solvent
Easily at heat-sealing, especially defect goes out by corroding mucigel, internal layer barrier layer being caused to be layered with aluminium foil, causes the works such as leakage
Skill defect.
A kind of lithium battery flexible packaging is disclosed in the Chinese invention patent specification of Application No. 201310596489.9 to use
Aluminum plastic film and production method, heat-sealing barrier layer used is individual layer cast polypropylene film, is bonded with aluminium foil surface by viscose.
Flatulence damage easily occurs during lithium battery storage for polypropylene film poor air-tightness.So that the lithium electricity using heat-sealing barrier layer
Pond service life is not grown.
The content of the invention
The problem to be solved in the present invention is to provide a kind of lithium battery flexible packaging gas absorption type internal layer co-extrusion film.Using this
Invention, can avoid that the globality of flexible package is destroyed, leakage happens, and improve the security and service life of lithium battery.
It is of the invention high a kind of to prepare lithium battery flexible packaging gas absorption type internal layer other problem solved is that providing
The method of co-extrusion film.
The invention solves the above problem realized by following technical scheme：
It is from outside to inside successively by gas absorption that the lithium battery of the present invention, which is packed for gas absorption type internal layer co-extrusion film feature,
Layer, mucigel, barrier layer, mechanical support layer, hot sealing layer are formed.
The adsorbent is made of Oxygen Adsorption layer and carbon dioxide adsorption layer.
The Oxygen Adsorption layer contains the raw material of following mass parts：
90 ~ 95 parts of polyethylene terephthalate；
End hydroxy butadiene/cis-butenedioic anhydride carboxylate oxygen absorbent or 1,4- butylene glycols/maleic anhydride carboxylate or 1,
4- butylene glycols/methyl tetrahydrophthalic anhydride 10 ~ 15 parts of oxygen absorbent of esterification；
0.05 ~ 0.1 part of acetic acid Co catalysts；
The carbon dioxide adsorption layer contains the raw material of following mass parts：
90 ~ 95 parts of polyethylene terephthalate；
0.5 ~ 3 part of metal-organic framework materials class zeolite imidazole base framework material.
The mucigel is acid modified polyolefin viscose.
The barrier layer contains the raw material of following mass parts：
80 ~ 95 parts of linear low density polyethylene；
0 ~ 0.3 part of dehydroabietic acid；
0.1 ~ 5 part of high density polyethylene (HDPE)；
The mechanical support layer contains the raw material of following mass parts：
80 ~ 90 parts of atactic copolymerized polypropene；
0 ~ 0.3 part of nano silicon dioxide；
1 ~ 3 part of polyvinyl chloride；
15 ~ 18 parts of polyolefin elastomer；
0.1 ~ 1 part of dehydroabietic acid；
0.05 ~ 0.075 part of calcium stearate.
The hot sealing layer contains the raw material of following mass parts：
80 ~ 90 parts of atactic copolymerized polypropene；
0 ~ 0.3 part of nano silicon dioxide；
15 ~ 18 parts of polyolefin elastomer.
It is to include following step successively to prepare the characteristics of lithium battery is packed for the method for gas absorption type internal layer co-extrusion film
Suddenly：
（1）First polyethylene terephthalate is put into dry 23 ~ 25 in the vacuum drying chamber that temperature is 115 ~ 125 DEG C
Hour, then by end hydroxy butadiene/cis-butenedioic anhydride carboxylate oxygen absorbent or Isosorbide-5-Nitrae-butylene glycol/maleic anhydride carboxylate or
After Isosorbide-5-Nitrae-butylene glycol/methyl tetrahydrophthalic anhydride esterification oxygen absorbent is sufficiently mixed together with acetic acid Co catalysts, with warp
It crosses dried polyethylene terephthalate to put into together in high-speed stirred pot, is uniformly mixed, obtains the first mixture；It
Afterwards, squeezed using the twin-screw that runner temperature is 255 ~ 275 DEG C, film mouth temperature is 255 ~ 265 DEG C, vacuum degree is 0.07 ~ 0.09Mpa
Go out machine, the first mixture is squeezed out and dried, obtain Oxygen Adsorption layer raw material；
Afterwards, polyethylene terephthalate is put into dry 23 ~ 25 in the vacuum drying chamber that temperature is 115 ~ 125 DEG C
Hour, then will together be put into high-speed stirred pot by dry polyethylene terephthalate, it is uniformly mixed, obtains second
Mixture；Afterwards, using the double screw extruder that runner temperature is 255 ~ 275 DEG C, film mouth temperature is 255 ~ 265 DEG C, by second
Mixture is squeezed out and dried, and obtains carbon dioxide adsorption layer raw material；
Afterwards, it is 255 ~ 265 DEG C using runner temperature, film mouth temperature is 255 ~ 265 DEG C of two twin-screw extrusions
After machine respectively squeezes out Oxygen Adsorption layer with raw material and carbon dioxide adsorption layer with raw material, then inhaled by oxygen with co-extrusion machine co-extrusion
The piece that attached layer and carbon dioxide adsorption layer are formed；
Afterwards, biaxial tension is carried out at a temperature of 100 ~ 120 DEG C with biaxial orientation stretching machine, biaxial stretching film is made, obtained
The adsorbent being made of Oxygen Adsorption layer and carbon dioxide adsorption layer；
（2）First linear low density polyethylene, dehydroabietic acid and high density polyethylene (HDPE) are put into high-speed stirred pot, mixing is equal
It is even, obtain the 3rd mixture；Then, be 170 ~ 190 DEG C by the 3rd mixture input runner temperature, film mouth temperature is 180 ~ 190
DEG C double screw extruder squeeze out and be cooled to room temperature；Afterwards, it is 50 ~ 60 minutes dry in 98 ~ 102 DEG C of baking oven, it is hindered
Interlayer raw material；
（3）First by atactic copolymerized polypropene, nano silicon dioxide, polyvinyl chloride, polyolefin elastomer, dehydroabietic acid and hard
Resin acid calcium is put into together in high-speed stirred pot, is uniformly mixed, is obtained the 4th mixture；Then, the 4th mixture is put into runner
The double screw extruder that temperature is 215 ~ 225 DEG C, film mouth temperature is 205 ~ 215 DEG C is squeezed out and is cooled to room temperature；Afterwards, 120 ~
It is 50 ~ 60 minutes dry in 130 DEG C of baking oven, obtain mechanical support layer raw material；
（4）First atactic copolymerized polypropene, rice silica, polyolefin elastomer are put into together in high-speed stirred pot, mixed
It closes uniformly, obtains the 5th mixture；Then, be 205 ~ 215 DEG C by the 5th mixture input runner temperature, film mouth temperature be 195 ~
205 DEG C of double screw extruder is squeezed out and is cooled to room temperature；Afterwards, it is 25 ~ 35 minutes dry in 120 ~ 130 DEG C of baking oven, it obtains
To hot sealing layer raw material；
（5）The barrier layer is first put into runner temperature with raw material respectively with raw material, mechanical support layer with raw material and hot sealing layer
It spends for 178 ~ 182 DEG C, 215 ~ 225 DEG C, 205 ~ 215 DEG C, film mouth temperature is that 210 ~ 220 DEG C of three screw extruders squeeze out
Afterwards, then with co-extrusion machine film is extruded into, obtains the semi-finished product film being made of barrier layer, mechanical support layer and hot sealing layer；
（6）Barrier layer outer surface coating mucigel in semi-finished product film, fits together with adsorbent, and to it
High-voltage corona processing is carried out, polar surfaces is formed in gas absorption layer surface, obtains lithium battery and be packed for gas absorption type internal layer
Co-extrusion film.
As can be seen from the above scheme, due to the present invention from outside to inside successively by adsorbent, mucigel, barrier layer,
Mechanical support layer, hot sealing layer are formed, and adsorbent is made of Oxygen Adsorption layer and carbon dioxide adsorption layer.The aluminium foil of use
Polar gas adsorption layer is double-layer structure, respectively fills metal organic framework material by base material of polyethylene terephthalate
The CO of material2Adsorption layer and the O that oxygen absorbent modification is added using polyethylene terephthalate as base material2Absorbed layer.Gas is inhaled
Attached layer surface is handled by high-voltage corona, good mechanical properties excellent with aluminium foil composite performance.Pass through mesoporous metal organic backbone
Material is to CO2Absorption, oxygen absorbent cobalt acetate catalyst effect under to O2Absorption, package interior can be kept without O2、
CO2It retains, prevents lithium ion battery from failing because of air-blowing.
The mucigel used by the present invention has the nonpolar viscosity of preferable polarity for acid modified polyolefin viscose, can be by pole
Property composite bed and low pole barrier layer it is good it is glutinous together with.And acid and alkali-resistance has preferable barrier property to soda acid, can
Prevent influence of the electrolyte to laminated performance.
The Obstruct membrane that the present invention uses has good choke block-water performance, toughness for modifying linear low-density polyethylene
It is outstanding, it is capable of providing good overall mechanical properties and barrier property.
Present invention employs modified polypropene casting films to do mechanical support layer, and the whole mechanics for possessing good composite membrane is strong
While spending, toughness is improved so that its hardly possible in battery packages technique is destroyed.
The hot sealing layer that the present invention uses has good barrier property and low-temperature heat-sealing performance for modified polypropene.
The present invention uses coextrusion casting technique, easy to produce and process, and avoids existing composite dry process to environment
Caused by pollution.
In short, being happened using being destroyed the invention avoids the globality of flexible package with leakage, lithium battery is improved
Security and service life.
Description of the drawings
Fig. 1 is the lithium battery flexible packaging gas absorption type internal layer co-extrusion membrane structure diagram of the present invention.
Specific embodiment
Embodiment one
As shown in Figure 1, the lithium battery of the present invention is packed for gas absorption type internal layer co-extrusion film from outside to inside successively by gas
Adsorption layer, mucigel, barrier layer, mechanical support layer, hot sealing layer are formed.The adsorbent is by Oxygen Adsorption layer and titanium dioxide
Carbon adsorption layer is formed.Wherein,
The Oxygen Adsorption layer contains the raw material of following mass parts：
90 parts of polyethylene terephthalate；
End hydroxy butadiene/13 parts of cis-butenedioic anhydride carboxylate oxygen absorbent；
0.1 part of acetic acid Co catalysts；
The carbon dioxide adsorption layer contains the raw material of following mass parts：
95 parts of polyethylene terephthalate；
0.5 part of metal-organic framework materials class zeolite imidazole base framework material.
The mucigel is acid modified polyolefin viscose.
The barrier layer contains the raw material of following mass parts：
90 parts of linear low density polyethylene；
3 parts of high density polyethylene (HDPE).
The mechanical support layer contains the raw material of following mass parts：
90 parts of atactic copolymerized polypropene；
0.15 part of nano silicon dioxide；
3 parts of polyvinyl chloride；
15 parts of polyolefin elastomer；
0.6 part of dehydroabietic acid；
0.075 part of calcium stearate.
The hot sealing layer contains the raw material of following mass parts：
80 parts of atactic copolymerized polypropene
15 ~ 18 parts of polyolefin elastomer.
It prepares lithium battery and is packed for the method for gas absorption type internal layer co-extrusion film and comprise the following steps successively：
（1）First by polyethylene terephthalate be put into temperature be in 120 DEG C of vacuum drying chamber it is dry 25 it is small when, then
It is dried with passing through after end hydroxy butadiene/cis-butenedioic anhydride carboxylate oxygen absorbent is sufficiently mixed together with acetic acid Co catalysts
Polyethylene terephthalate is put into together in high-speed stirred pot, is uniformly mixed, is obtained the first mixture.Afterwards, stream is utilized
The double screw extruder that channel temp is 255 DEG C, film mouth temperature is 255 DEG C, vacuum degree is 0.08Mpa squeezes out the first mixture
And dry, obtain Oxygen Adsorption layer raw material；
Afterwards, by polyethylene terephthalate be put into temperature be in 125 DEG C of vacuum drying chamber it is dry 24 it is small when, then
It will be by dry polyethylene terephthalate input high-speed stirred pot, being uniformly mixed, obtaining the second mixture.It
Afterwards, using the double screw extruder that runner temperature is 275 DEG C, film mouth temperature is 255 DEG C, the second mixture is squeezed out and dried,
Obtain carbon dioxide adsorption layer raw material；
Afterwards, it is 255 DEG C using runner temperature, film mouth temperature is that 255 DEG C of two double screw extruders respectively will
After Oxygen Adsorption layer is squeezed out with raw material and carbon dioxide adsorption layer with raw material, then with co-extrusion machine co-extrusion by Oxygen Adsorption layer and two
The piece that carbonoxide adsorption layer is formed；
Afterwards, biaxial tension is carried out at a temperature of 120 DEG C with biaxial orientation stretching machine, biaxial stretching film is made, obtained by oxygen
The adsorbent that gas adsorption layer and carbon dioxide adsorption layer are formed；
（2）First linear low density polyethylene, dehydroabietic acid and high density polyethylene (HDPE) are put into high-speed stirred pot, mixing is equal
It is even, obtain the 3rd mixture.Then, it is 190 DEG C by the 3rd mixture input runner temperature, double spiral shells that film mouth temperature is 180 DEG C
Bar extruder is squeezed out and is cooled to room temperature.Afterwards, it is 55 minutes dry in 100 DEG C of baking oven, obtain barrier layer raw material；
（3）First by atactic copolymerized polypropene, nano silicon dioxide, polyvinyl chloride, polyolefin elastomer, dehydroabietic acid and hard
Resin acid calcium is put into together in high-speed stirred pot, is uniformly mixed, is obtained the 4th mixture.Then, the 4th mixture is put into runner
The double screw extruder that temperature is 225 DEG C, film mouth temperature is 205 DEG C is squeezed out and is cooled to room temperature.Afterwards, in 125 DEG C of baking oven
Interior drying 55 minutes obtains mechanical support layer raw material；
（4）First atactic copolymerized polypropene, rice silica, polyolefin elastomer are put into together in high-speed stirred pot, mixed
It closes uniformly, obtains the 5th mixture.Then, be 215 DEG C by the 5th mixture input runner temperature, film mouth temperature is 200 DEG C
Double screw extruder is squeezed out and is cooled to room temperature.Afterwards, it is 25 minutes dry in 130 DEG C of baking oven, obtain hot sealing layer raw material；
（5）The barrier layer is first put into runner temperature with raw material respectively with raw material, mechanical support layer with raw material and hot sealing layer
It spends for 178 DEG C, 220 DEG C, 215 DEG C, film mouth temperature is after 210 DEG C of three screw extruders squeeze out, then is extruded with co-extrusion machine
Into film, the semi-finished product film being made of barrier layer, mechanical support layer and hot sealing layer is obtained；
（6）Barrier layer outer surface coating mucigel in semi-finished product film, fits together with adsorbent, and to it
High-voltage corona processing is carried out, polar surfaces is formed in gas absorption layer surface, obtains lithium battery and be packed for gas absorption type internal layer
Co-extrusion film.
Embodiment two
As shown in Figure 1, the lithium battery of the present invention is packed for gas absorption type internal layer co-extrusion film from outside to inside successively by gas
Adsorption layer, mucigel, barrier layer, mechanical support layer, hot sealing layer are formed.The adsorbent is by Oxygen Adsorption layer and titanium dioxide
Carbon adsorption layer is formed.Wherein,
The Oxygen Adsorption layer contains the raw material of following mass parts：
93 parts of polyethylene terephthalate；
1,4- butylene glycols/15 parts of maleic anhydride carboxylate；
0.08 part of acetic acid Co catalysts；
The carbon dioxide adsorption layer contains the raw material of following mass parts：
92 parts of polyethylene terephthalate；
1.6 parts of metal-organic framework materials class zeolite imidazole base framework material.
The mucigel is acid modified polyolefin viscose.
The barrier layer contains the raw material of following mass parts：
95 parts of linear low density polyethylene；
0.15 part of dehydroabietic acid
0.1 part of high density polyethylene (HDPE).
The mechanical support layer contains the raw material of following mass parts：
85 parts of atactic copolymerized polypropene；
2 parts of polyvinyl chloride；
17 parts of polyolefin elastomer；
1 part of dehydroabietic acid；
0.06 part of calcium stearate.
The hot sealing layer contains the raw material of following mass parts：
85 parts of atactic copolymerized polypropene；
0.3 part of nano silicon dioxide；
16 parts of polyolefin elastomer.
It prepares lithium battery and is packed for the method for gas absorption type internal layer co-extrusion film and comprise the following steps successively：
（1）First by polyethylene terephthalate be put into temperature be in 125 DEG C of vacuum drying chamber it is dry 23 it is small when, then
After Isosorbide-5-Nitrae-butylene glycol/methyl tetrahydrophthalic anhydride esterification oxygen absorbent is sufficiently mixed together with acetic acid Co catalysts, with
It is put into together in high-speed stirred pot by dried polyethylene terephthalate, is uniformly mixed, obtains the first mixture.
Afterwards, using the double screw extruder that runner temperature is 265 DEG C, film mouth temperature is 265 DEG C, vacuum degree is 0.09Mpa, by first
Mixture is squeezed out and dried, and obtains Oxygen Adsorption layer raw material；
Afterwards, by polyethylene terephthalate be put into temperature be in 120 DEG C of vacuum drying chamber it is dry 25 it is small when, then
It will be by dry polyethylene terephthalate input high-speed stirred pot, being uniformly mixed, obtaining the second mixture.It
Afterwards, using the double screw extruder that runner temperature is 265 DEG C, film mouth temperature is 260 DEG C, the second mixture is squeezed out and dried,
Obtain carbon dioxide adsorption layer raw material；
Afterwards, it is 260 DEG C using runner temperature, film mouth temperature is that 260 DEG C of two double screw extruders respectively will
After Oxygen Adsorption layer is squeezed out with raw material and carbon dioxide adsorption layer with raw material, then with co-extrusion machine co-extrusion by Oxygen Adsorption layer and two
The piece that carbonoxide adsorption layer is formed；
Afterwards, biaxial tension is carried out at a temperature of 115 DEG C with biaxial orientation stretching machine, biaxial stretching film is made, obtained by oxygen
The adsorbent that gas adsorption layer and carbon dioxide adsorption layer are formed；
（2）First linear low density polyethylene, dehydroabietic acid and high density polyethylene (HDPE) are put into high-speed stirred pot, mixing is equal
It is even, obtain the 3rd mixture.Then, it is 180 DEG C by the 3rd mixture input runner temperature, double spiral shells that film mouth temperature is 185 DEG C
Bar extruder is squeezed out and is cooled to room temperature.Afterwards, it is 50 minutes dry in 102 DEG C of baking oven, obtain barrier layer raw material；
（3）First by atactic copolymerized polypropene, nano silicon dioxide, polyvinyl chloride, polyolefin elastomer, dehydroabietic acid and hard
Resin acid calcium is put into together in high-speed stirred pot, is uniformly mixed, is obtained the 4th mixture.Then, the 4th mixture is put into runner
The double screw extruder that temperature is 215 DEG C, film mouth temperature is 210 DEG C is squeezed out and is cooled to room temperature.Afterwards, in 130 DEG C of baking oven
Interior drying 50 minutes obtains mechanical support layer raw material；
（4）First atactic copolymerized polypropene, rice silica, polyolefin elastomer are put into together in high-speed stirred pot, mixed
It closes uniformly, obtains the 5th mixture.Then, be 205 DEG C by the 5th mixture input runner temperature, film mouth temperature is 205 DEG C
Double screw extruder is squeezed out and is cooled to room temperature.Afterwards, it is 30 minutes dry in 120 DEG C of baking oven, obtain hot sealing layer raw material；
（5）The barrier layer is first put into runner temperature with raw material respectively with raw material, mechanical support layer with raw material and hot sealing layer
It spends for 180 DEG C, 225 DEG C, 205 DEG C, film mouth temperature is after 215 DEG C of three screw extruders squeeze out, then is extruded with co-extrusion machine
Into film, the semi-finished product film being made of barrier layer, mechanical support layer and hot sealing layer is obtained；
（6）Barrier layer outer surface coating mucigel in semi-finished product film, fits together with adsorbent, and to it
High-voltage corona processing is carried out, polar surfaces is formed in gas absorption layer surface, obtains lithium battery and be packed for gas absorption type internal layer
Co-extrusion film.
Embodiment three
As shown in Figure 1, the lithium battery of the present invention is packed for gas absorption type internal layer co-extrusion film from outside to inside successively by gas
Adsorption layer, mucigel, barrier layer, mechanical support layer, hot sealing layer are formed.The adsorbent is by Oxygen Adsorption layer and titanium dioxide
Carbon adsorption layer is formed.Wherein,
The Oxygen Adsorption layer contains the raw material of following mass parts：
95 parts of polyethylene terephthalate；
1,4- butylene glycols/methyl tetrahydrophthalic anhydride 10 parts of oxygen absorbent of esterification；
0.05 part of acetic acid Co catalysts；
The carbon dioxide adsorption layer contains the raw material of following mass parts：
90 parts of polyethylene terephthalate；
3 parts of metal-organic framework materials class zeolite imidazole base framework material.
The mucigel is acid modified polyolefin viscose.
The barrier layer contains the raw material of following mass parts：
80 parts of linear low density polyethylene；
0.3 part of dehydroabietic acid；
5 parts of high density polyethylene (HDPE)；
The mechanical support layer contains the raw material of following mass parts：
80 parts of atactic copolymerized polypropene；
0.3 part of nano silicon dioxide；
3 parts of polyvinyl chloride；
18 parts of polyolefin elastomer；
0.1 part of dehydroabietic acid；
0.075 part of calcium stearate.
The hot sealing layer contains the raw material of following mass parts：
90 parts of atactic copolymerized polypropene；
0.15 part of nano silicon dioxide；
18 parts of polyolefin elastomer.
It prepares lithium battery and is packed for the method for gas absorption type internal layer co-extrusion film and comprise the following steps successively：
（1）First by polyethylene terephthalate be put into temperature be in 115 DEG C of vacuum drying chamber it is dry 24 it is small when, then
After Isosorbide-5-Nitrae-butylene glycol/methyl tetrahydrophthalic anhydride esterification oxygen absorbent is sufficiently mixed together with acetic acid Co catalysts, with
It is put into together in high-speed stirred pot by dried polyethylene terephthalate, is uniformly mixed, obtains the first mixture.
Afterwards, using the double screw extruder that runner temperature is 275 DEG C, film mouth temperature is 275 DEG C, vacuum degree is 0.07Mpa, by first
Mixture is squeezed out and dried, and obtains Oxygen Adsorption layer raw material；
Afterwards, by polyethylene terephthalate be put into temperature be in 115 DEG C of vacuum drying chamber it is dry 23 it is small when, then
It will together be put into high-speed stirred pot by dry polyethylene terephthalate, be uniformly mixed, obtain the second mixture.
Afterwards, using the double screw extruder that runner temperature is 255 DEG C, film mouth temperature is 265 DEG C, the second mixture is squeezed out and dried
It is dry, obtain carbon dioxide adsorption layer raw material；
Afterwards, it is 265 DEG C using runner temperature, film mouth temperature is that 265 DEG C of two double screw extruders respectively will
After Oxygen Adsorption layer is squeezed out with raw material and carbon dioxide adsorption layer with raw material, then with co-extrusion machine co-extrusion by Oxygen Adsorption layer and two
The piece that carbonoxide adsorption layer is formed；
Afterwards, biaxial tension is carried out at a temperature of 100 DEG C with biaxial orientation stretching machine, biaxial stretching film is made, obtained by oxygen
The adsorbent that gas adsorption layer and carbon dioxide adsorption layer are formed；
（2）First linear low density polyethylene, dehydroabietic acid and high density polyethylene (HDPE) are put into high-speed stirred pot, mixing is equal
It is even, obtain the 3rd mixture.Then, it is 170 DEG C by the 3rd mixture input runner temperature, double spiral shells that film mouth temperature is 190 DEG C
Bar extruder is squeezed out and is cooled to room temperature.Afterwards, it is 60 minutes dry in 98 DEG C of baking oven, obtain barrier layer raw material；
（3）First by atactic copolymerized polypropene, nano silicon dioxide, polyvinyl chloride, polyolefin elastomer, dehydroabietic acid and hard
Resin acid calcium is put into together in high-speed stirred pot, is uniformly mixed, is obtained the 4th mixture.Then, the 4th mixture is put into runner
The double screw extruder that temperature is 220 DEG C, film mouth temperature is 215 DEG C is squeezed out and is cooled to room temperature.Afterwards, in 120 DEG C of baking oven
Interior drying 60 minutes obtains mechanical support layer raw material；
（4）First atactic copolymerized polypropene, rice silica, polyolefin elastomer are put into together in high-speed stirred pot, mixed
It closes uniformly, obtains the 5th mixture；Then, be 205 DEG C by the 5th mixture input runner temperature, film mouth temperature is 195 DEG C
Double screw extruder is squeezed out and is cooled to room temperature.Afterwards, it is 35 minutes dry in 125 DEG C of baking oven, obtain hot sealing layer raw material；
（5）The barrier layer is first put into runner temperature with raw material respectively with raw material, mechanical support layer with raw material and hot sealing layer
It spends for 182 DEG C, 215 DEG C, 210 DEG C, film mouth temperature is after 220 DEG C of three screw extruders squeeze out, then is extruded with co-extrusion machine
Into film, the semi-finished product film being made of barrier layer, mechanical support layer and hot sealing layer is obtained；
（6）Barrier layer outer surface coating mucigel in semi-finished product film, fits together with adsorbent, and to it
High-voltage corona processing is carried out, polar surfaces is formed in gas absorption layer surface, obtains lithium battery and be packed for gas absorption type internal layer
Co-extrusion film.
Claims (8)
1. a kind of lithium battery flexible packaging preparation method of gas absorption type internal layer co-extrusion film, it is characterised in that successively including following
Step：
（1）It is small that polyethylene terephthalate is first put into drying 23 ~ 25 in the vacuum drying chamber that temperature is 115 ~ 125 DEG C
When, then by end hydroxy butadiene/cis-butenedioic anhydride carboxylate oxygen absorbent or Isosorbide-5-Nitrae-butylene glycol/maleic anhydride carboxylate or 1,
After 4- butylene glycols/methyl tetrahydrophthalic anhydride esterification oxygen absorbent is sufficiently mixed together with acetic acid Co catalysts, with process
Dried polyethylene terephthalate is put into together in high-speed stirred pot, is uniformly mixed, is obtained the first mixture；It
Afterwards, squeezed using the twin-screw that runner temperature is 255 ~ 275 DEG C, film mouth temperature is 255 ~ 265 DEG C, vacuum degree is 0.07 ~ 0.09Mpa
Go out machine, the first mixture is squeezed out and dried, obtain Oxygen Adsorption layer raw material；
Afterwards, by polyethylene terephthalate be put into temperature be in 115 ~ 125 DEG C of vacuum drying chamber it is dry 23 ~ 25 small
When, then by the polyethylene terephthalate Jing Guo Gan Zao and metal-organic framework materials class zeolite imidazole base framework material
It puts into together in high-speed stirred pot, is uniformly mixed, obtains the second mixture；Afterwards, it is 255 ~ 275 DEG C, film using runner temperature
The double screw extruder that mouth temperature is 255 ~ 265 DEG C, the second mixture is squeezed out and dried, and obtains carbon dioxide adsorption layer original
Material；
Afterwards, it is 255 ~ 265 DEG C using runner temperature, film mouth temperature is 255 ~ 265 DEG C of two double screw extruders point
After Oxygen Adsorption layer is not squeezed out with raw material and carbon dioxide adsorption layer with raw material, then with co-extrusion machine co-extrusion by Oxygen Adsorption layer
The piece formed with carbon dioxide adsorption layer；
Afterwards, biaxial tension is carried out at a temperature of 100 ~ 120 DEG C with biaxial orientation stretching machine, biaxial stretching film is made, obtained by oxygen
The adsorbent that gas adsorption layer and carbon dioxide adsorption layer are formed；
（2）First linear low density polyethylene, dehydroabietic acid and high density polyethylene (HDPE) are put into high-speed stirred pot, are uniformly mixed,
Obtain the 3rd mixture；Then, be 170 ~ 190 DEG C by the 3rd mixture input runner temperature, film mouth temperature is 180 ~ 190 DEG C
Double screw extruder is squeezed out and is cooled to room temperature；Afterwards, it is 50 ~ 60 minutes dry in 98 ~ 102 DEG C of baking oven, obtain barrier layer
Use raw material；
（3）First by atactic copolymerized polypropene, nano silicon dioxide, polyvinyl chloride, polyolefin elastomer, dehydroabietic acid and stearic acid
Calcium is put into together in high-speed stirred pot, is uniformly mixed, is obtained the 4th mixture；Then, the 4th mixture is put into runner temperature
It squeezes out and is cooled to room temperature for 215 ~ 225 DEG C, the double screw extruder that film mouth temperature is 205 ~ 215 DEG C；Afterwards, 120 ~ 130
DEG C baking oven in dry 50 ~ 60 minutes, obtain mechanical support layer raw material；
（4）First atactic copolymerized polypropene, nano silicon dioxide, polyolefin elastomer are put into together in high-speed stirred pot, mixed
Uniformly, the 5th mixture is obtained；Then, be 205 ~ 215 DEG C by the 5th mixture input runner temperature, film mouth temperature be 195 ~
205 DEG C of double screw extruder is squeezed out and is cooled to room temperature；Afterwards, it is 25 ~ 35 minutes dry in 120 ~ 130 DEG C of baking oven, it obtains
To hot sealing layer raw material；
（5）The barrier layer is first put into runner temperature respectively with raw material with raw material and hot sealing layer with raw material, mechanical support layer is
178 ~ 182 DEG C, 215 ~ 225 DEG C, 205 ~ 215 DEG C, film mouth temperature be 210 ~ 220 DEG C three screw extruders squeeze out after, then
Film is extruded into co-extrusion machine, obtains the semi-finished product film being made of barrier layer, mechanical support layer and hot sealing layer；
（6）Barrier layer outer surface coating mucigel in semi-finished product film, fits together with adsorbent, and it is carried out
High-voltage corona is handled, and is formed polar surfaces in gas absorption layer surface, is obtained lithium battery and be packed for gas absorption type internal layer co-extrusion
Film.
2. the lithium battery flexible packaging according to claim 1 preparation method of gas absorption type internal layer co-extrusion film, feature
It is the raw material that the Oxygen Adsorption layer contains following mass parts：
90 ~ 95 parts of polyethylene terephthalate；End hydroxy butadiene/cis-butenedioic anhydride carboxylate oxygen absorbent or 1,4- butylene two
Alcohol/maleic anhydride carboxylate or 1,4- butylene glycols/methyl tetrahydrophthalic anhydride 10 ~ 15 parts of oxygen absorbent of esterification；Second
Sour 0.05 ~ 0.1 part of Co catalysts.
3. the lithium battery flexible packaging according to claim 1 preparation method of gas absorption type internal layer co-extrusion film, feature
It is the raw material that the carbon dioxide adsorption layer contains following mass parts：
90 ~ 95 parts of polyethylene terephthalate；
0.5 ~ 3 part of metal-organic framework materials class zeolite imidazole base framework material.
4. the lithium battery flexible packaging according to claim 1 preparation method of gas absorption type internal layer co-extrusion film, feature
It is acid modified polyolefin viscose to be the mucigel.
5. the lithium battery flexible packaging according to claim 1 preparation method of gas absorption type internal layer co-extrusion film, feature
It is that the barrier layer contains the raw material of following mass parts：
80 ~ 95 parts of linear low density polyethylene；
0 ~ 0.3 part of dehydroabietic acid；
0.1 ~ 5 part of high density polyethylene (HDPE).
6. the lithium battery flexible packaging according to claim 1 preparation method of gas absorption type internal layer co-extrusion film, feature
It is the raw material that the mechanical support layer contains following mass parts：
80 ~ 90 parts of atactic copolymerized polypropene；
0 ~ 0.3 part of nano silicon dioxide；
1 ~ 3 part of polyvinyl chloride；
15 ~ 18 parts of polyolefin elastomer；
0.1 ~ 1 part of dehydroabietic acid；
0.05 ~ 0.075 part of calcium stearate.
7. the lithium battery flexible packaging according to claim 1 preparation method of gas absorption type internal layer co-extrusion film, feature
It is that the hot sealing layer contains the raw material of following mass parts：
80 ~ 90 parts of atactic copolymerized polypropene；
0 ~ 0.3 part of nano silicon dioxide；
15 ~ 18 parts of polyolefin elastomer.
8. the preparation side of the lithium battery flexible packaging gas absorption type internal layer co-extrusion film according to any one of claim 1 ~ 7
Lithium battery flexible packaging gas absorption type internal layer co-extrusion film prepared by method.
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| CN109822998A (en) * | 2018-12-28 | 2019-05-31 | 桑顿新能源科技有限公司 | A kind of clad aluminum plastic film and preparation method thereof and battery |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1314008A (en) * | 1999-04-08 | 2001-09-19 | 大日本印刷株式会社 | meterial for packaging cell, bag for packaging cell, and its production method |
| CN206154836U (en) * | 2016-08-30 | 2017-05-10 | 无锡华盈锂能新材有限公司 | Lithium is gas absorption type inlayer coextrusion film for battery flexible package |
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| US7204862B1 (en) * | 2002-01-10 | 2007-04-17 | Excellatron Solid State, Llc | Packaged thin film batteries and methods of packaging thin film batteries |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1314008A (en) * | 1999-04-08 | 2001-09-19 | 大日本印刷株式会社 | meterial for packaging cell, bag for packaging cell, and its production method |
| CN206154836U (en) * | 2016-08-30 | 2017-05-10 | 无锡华盈锂能新材有限公司 | Lithium is gas absorption type inlayer coextrusion film for battery flexible package |
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