CN115746523A - Novel material air column bag with strong degradation capability and preparation method thereof - Google Patents
Novel material air column bag with strong degradation capability and preparation method thereof Download PDFInfo
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W90/00—Enabling technologies or technologies with a potential or indirect contribution to greenhouse gas [GHG] emissions mitigation
- Y02W90/10—Bio-packaging, e.g. packing containers made from renewable resources or bio-plastics
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- Biological Depolymerization Polymers (AREA)
Abstract
The application relates to the field of novel packaging materials, and particularly discloses a novel material air column bag with strong degradation capability and a preparation method thereof. The novel material air column bag with strong degradation capability is made of degradable plastics, and the degradable plastics comprise the following raw materials in parts by weight: 100-140 parts of polylactic acid, 6-10 parts of polyvinyl alcohol, 3-5 parts of nucleating agent, 1-3 parts of coupling agent, 1-3 parts of plasticizer, 1-1.4 parts of photocatalyst and 7-11 parts of auxiliary components, wherein the auxiliary components comprise a nutrient component, a decomposition component for promoting the decomposition of the nutrient component and a toughening component, and the weight ratio of the nutrient component to the decomposition component to the toughening component is (3-5) to (2-4) to 2. The new material gas column bag that the degradability is strong of this application can be used to article package, and it has the advantage that the degradability is strong.
Description
Technical Field
The application relates to the field of novel packaging materials, in particular to a novel material air column bag with strong degradation capability and a preparation method thereof.
Background
The air column bag is a novel packaging material filled with natural air, and the product transportation loss rate is reduced to the minimum through the air column type buffer protection of the comprehensive coating. The air column bag has wide application range, is a substitute for epe, eps and paper and plastic, and can be used for products which are related to packaging and need to be transported.
In order to reduce the pollution of plastics to the environment, compostable degradable plastics are used for preparing the gas column bag, and the gas column bag after being discarded is disintegrated and degraded due to the biological reaction process under the compostable condition.
In the composting process, the temperature and humidity of the outer layer of the compost are lower than those of the inner layer, so that the degradation rate of the outer layer is also lower than that of the inner layer, and the compost needs to be turned over for many times in order to improve the degradation rate of the outer layer, thereby increasing the labor intensity of workers.
Disclosure of Invention
In order to improve the degradation rate of gas column bag plastics and reduce the labor intensity of workers, the application provides a new material gas column bag with strong degradation capability and a preparation method thereof.
In a first aspect, the application provides a new material air column bag with strong degradation capability, which adopts the following technical scheme: a novel material gas column bag with strong degradation capability is prepared from degradable plastics, wherein the degradable plastics comprise the following raw materials in parts by weight: 100-140 parts of polylactic acid, 6-10 parts of polyvinyl alcohol, 3-5 parts of nucleating agent, 1-3 parts of coupling agent, 1-3 parts of plasticizer, 1-1.4 parts of photocatalyst and 7-11 parts of auxiliary components, wherein the auxiliary components comprise a nutrient component, a decomposition component for promoting the decomposition of the nutrient component and a toughening component, and the weight ratio of the nutrient component to the decomposition component to the toughening component is (3-5) to (2-4) to 2.
By adopting the technical scheme, the connection stability of the nutrient components and the decomposition components in the whole body is improved by the toughening components, the condition that the overall strength is reduced due to the addition of the nutrient components and the decomposition components is reduced, and the nutrient components are more suitable for being absorbed by microorganisms after the decomposition components are decomposed during compost decomposition, so that the microorganism propagation is effectively promoted, the toughening components are decomposed, the degradation rate of plastics is effectively improved, the frequency of turning the compost by workers is reduced, and the labor intensity of the workers is reduced.
Preferably, the nutrient component is bee pollen, and the bee pollen is crushed to have the granularity of 800 meshes.
By adopting the technical scheme, the bee pollen is crushed and then participates in synthesis of plastics as nutrient components, and during compost decomposition, the bee pollen is decomposed by the decomposition components, so that the bee pollen is decomposed into nutrient substances which are easier to absorb, microbial propagation is promoted by the nutrient substances, and the decomposition efficiency of the plastics is obviously improved after the number of the microorganisms is increased, so that the degradation efficiency of the plastics is accelerated.
Preferably, the decomposition component is hydroxypropyl- β -cyclodextrin.
By adopting the technical scheme, the hydroxypropyl-beta-cyclodextrin has certain hygroscopicity, so that the plastic in the composting degradation process is more in line with the growth environment of microorganisms, the bee pollen is more easily decomposed into nutrient substances, and the hydroxypropyl-beta-cyclodextrin plays a role in stabilizing the nutrient substances, reduces the loss of the nutrient substances due to denaturation and the like, and enables the nutrient substances to be more reserved for the microorganisms to absorb.
Preferably, the toughening component is silk fiber, and the weight ratio of the bee pollen to the hydroxypropyl-beta-cyclodextrin to the silk fiber is 4.
By adopting the technical scheme, the silk fiber plays a toughening role, the influence of the addition of bee pollen and hydroxypropyl-beta-cyclodextrin on the performance of plastics is reduced, and meanwhile, in the composting and degrading process, the silk fiber can also be decomposed into amino-acid and other nutrient substances which are further absorbed and decomposed by microorganisms, so that the propagation of the microorganisms is promoted.
Preferably, the nucleating agent is alpha-cyclodextrin.
By adopting the technical scheme, the alpha-cyclodextrin is oligosaccharide with a ring structure, the molecular structure is designed in a conical shape, the outer side of the alpha-cyclodextrin is hydrophilic, the inner cavity of the alpha-cyclodextrin is hydrophobic, and the alpha-cyclodextrin has the characteristic of an enzyme model, and can play a certain role in catalytic degradation while playing a role in nucleating agent.
Preferably, the weight ratio of the nucleating agent to the nutritional components is 1.
By adopting the technical scheme, the alpha-cyclodextrin and the hydroxypropyl-beta-cyclodextrin can promote the nucleation of the plastic, thereby reducing the area of an amorphous area, improving the overall density and further effectively improving the strength of the plastic.
Preferably, the photocatalyst also comprises 1 to 1.4 parts.
Through adopting above-mentioned technical scheme, use earlier the photocatalysis to make degradable plastics carry out first step degradation, degradable plastics part macromolecule decomposes into the micromolecule to reduce the compost degradation degree of difficulty, more be favorable to the microorganism to degrade degradable plastics, improve degradation speed.
Preferably, the preparation method of the degradable plastic comprises the following steps: drying polylactic acid and polyvinyl alcohol, mixing with other raw materials, and performing extrusion granulation to generate the degradable plastic master batch.
By adopting the technical scheme, the polylactic acid and the polyvinyl alcohol are dried to reduce the water content of the polylactic acid and the polyvinyl alcohol, and then are mixed with other raw materials to generate the degradable plastic master batch, so that the operation is simple and convenient.
In a second aspect, the present application provides a method for preparing a new material gas column bag with strong degradability, which adopts the following technical scheme:
a preparation method of a new material air column bag with strong degradation capability comprises the following steps: blow the degradable plastics master batch into the membrane, along a plurality of air cock valves of degradable plastics film length direction heat seal between two-layer degradable plastics film, then correspond air cock valve heat seal and cut apart into a plurality of gas column rooms with degradable plastics film, the gas column room is rectangular shape and gas column room length direction and degradable plastics film width direction parallel, aerifys through the breather valve to the gas column is indoor can make the gas column coiled material, thereby convolute the gas column coiled material and fix on article and form the gas column bag.
By adopting the technical scheme, the prepared plastic master batch is prepared into the plastic film, then the air column chamber is formed by thermally sealing the air nozzle valve, and finally the air column coiled material is wound and packaged to form the air column bag, so that the operation flow is simple.
In summary, the present application has the following beneficial effects:
1. according to the application, with the addition of bee pollen and hydroxypropyl-beta-cyclodextrin, silk fiber is added to improve the stability and strength of the plastic, so that the influence of the addition of the bee pollen and the hydroxypropyl-beta-cyclodextrin on the performance of the plastic is reduced, when composting decomposition is carried out, the hydroxypropyl-beta-cyclodextrin provides a wet environment for microbial propagation due to the hygroscopicity of the hydroxypropyl-beta-cyclodextrin, and the bee pollen and the silk fiber decomposition provide nutrient substances for microbial propagation, so that the microbial propagation speed is further improved, the microbial number is increased, the degradation rate is improved, and the decomposition of the degradable plastic is further promoted.
2. In the application, the hydroxypropyl-beta-cyclodextrin plays a stabilizing role in nutrient substances such as amino acid and the like, reduces the loss of the nutrient substances due to denaturation and the like, enables the nutrient substances to be reserved more for the absorption of microorganisms, and provides more nutrient substances for the propagation of the microorganisms.
3. In the application, both the alpha-cyclodextrin and the hydroxypropyl-beta-cyclodextrin have the function of promoting nucleation, and in order to reduce the moisture absorption performance of the plastic, the alpha-cyclodextrin is added to reduce the addition of the hydroxypropyl-beta-cyclodextrin, so that the influence on the strength of the plastic is effectively reduced.
Drawings
FIG. 1 is a view showing a structure of a gas column pouch in example 23 of this application;
fig. 2 is a partial structural sectional view of an air column bag in example 23 of this application.
Description of reference numerals: 1. a gas column coil; 2. a degradable plastic film; 3. a gas column chamber; 4. an air tap valve.
Detailed Description
In the application, the polylactic acid is dried for 4 hours at the temperature of 50 ℃; polyethyleneDrying the alcohol at 50 ℃ for 4h; the nucleating agent is powdery alpha-cyclodextrin; the coupling agent is a granular thermoplastic elastomer SEBS, namely maleic anhydride grafted polystyrene-polyethylene-polybutylene-polystyrene copolymer; the plasticizer is epoxy fatty acid methyl ester; the nutrient component is bee pollen, and is crushed into 800 meshes by a jet mill; the decomposition component is powdery hydroxypropyl-beta-cyclodextrin; the toughening component is mulberry silk fiber with the diameter of D 90 =15 μm and a length after cutting of 3mm; the photocatalyst is nano titanium dioxide with the particle size of 5nm.
The present application will be described in further detail with reference to examples.
Examples
Example 1
S1, adding 10kg of polylactic acid and 0.6kg of polyvinyl alcohol into a high-speed mixer, sequentially adding 0.3kg of alpha-cyclodextrin, 0.1kg of coupling agent, 0.1kg of plasticizer, 0.3kg of bee pollen, 0.2kg of hydroxypropyl-beta-cyclodextrin and 0.2kg of mulberry silk fiber, setting the temperature to be 120 ℃, setting the rotating speed to be 500r/min, and mixing and stirring for 30min;
and S2, adding the mixture in the S1 into a double-screw extruder, controlling the temperature of a 1-8 area of the double-screw extruder to be 180 ℃, 185 ℃, 190 ℃, 185 ℃ and 185 ℃, and controlling the screw rotation speed to be 100r/min, and extruding to obtain the plastic master batch.
Example 2
S1, adding 10kg of polylactic acid and 0.6kg of polyvinyl alcohol into a high-speed mixer, sequentially adding 0.4kg of alpha-cyclodextrin, 0.2kg of coupling agent, 0.2kg of plasticizer, 0.4kg of bee pollen, 0.3kg of hydroxypropyl-beta-cyclodextrin and 0.2kg of mulberry silk fiber, setting the temperature to be 120 ℃, setting the rotating speed to be 500r/min, and mixing and stirring for 30min;
and S2, adding the mixture in the S1 into a double-screw extruder, controlling the temperature of a 1-8 area of the double-screw extruder to be 180 ℃, 185 ℃, 190 ℃, 185 ℃ and 185 ℃, and controlling the screw rotation speed to be 100r/min, and extruding to obtain the plastic master batch.
Example 3
S1, adding 10kg of polylactic acid and 0.6kg of polyvinyl alcohol into a high-speed mixer, sequentially adding 0.5kg of alpha-cyclodextrin, 0.3kg of coupling agent, 0.3kg of plasticizer, 0.5kg of bee pollen, 0.3kg of hydroxypropyl-beta-cyclodextrin and 0.3kg of mulberry silk fiber, setting the temperature to be 120 ℃, setting the rotating speed to be 500r/min, and mixing and stirring for 30min;
and S2, adding the mixture in the S1 into a double-screw extruder, controlling the temperature of a 1-8 area of the double-screw extruder to be 180 ℃, 185 ℃, 190 ℃, 185 ℃ and 185 ℃, and controlling the screw rotation speed to be 100r/min, and extruding to obtain the plastic master batch.
Example 4
S1, adding 12kg of polylactic acid and 0.8kg of polyvinyl alcohol into a high-speed mixer, sequentially adding 0.3kg of alpha-cyclodextrin, 0.1kg of coupling agent, 0.1kg of plasticizer, 0.3kg of bee pollen, 0.2kg of hydroxypropyl-beta-cyclodextrin and 0.2kg of mulberry silk fiber, setting the temperature at 120 ℃ and the rotating speed at 500r/min, and mixing and stirring for 30min;
and S2, adding the mixture in the S1 into a double-screw extruder, controlling the temperature of a 1-8 area of the double-screw extruder to be 180 ℃, 185 ℃, 190 ℃, 185 ℃ and 185 ℃, and controlling the screw rotation speed to be 100r/min, and extruding to obtain the plastic master batch.
Example 5
The difference from the example 4 lies in: in the S1, 0.4kg of alpha-cyclodextrin, 0.2kg of coupling agent and 0.2kg of plasticizer are added.
Example 6
The difference from the example 5 is that: 0.3kg of hydroxypropyl-beta-cyclodextrin in the S1.
Example 7
The difference from example 5 is that: 0.4kg of hydroxypropyl-beta-cyclodextrin in the S1.
Example 8
The difference from the example 5 is that: the bee pollen content in S1 is 0.4kg.
Example 9
The difference from example 8 is that: 0.3kg of hydroxypropyl-beta-cyclodextrin in the S1.
Example 10
The difference from example 8 is that: 0.4kg of hydroxypropyl-beta-cyclodextrin in the S1.
Example 11
The difference from the example 5 is that: the bee pollen content in S1 is 0.5kg.
Example 12
The difference from example 5 is that: 0.3kg of hydroxypropyl-beta-cyclodextrin in the S1.
Example 13
The difference from example 5 is that: 0.4kg of hydroxypropyl-beta-cyclodextrin in the S1.
Example 14
The difference from example 9 is that: 0.3kg of alpha-cyclodextrin in S1
Example 15
The difference from example 9 is that: 0.5kg of alpha-cyclodextrin in S1
Example 16
The difference from the example 3 is that: in S1, 12kg of polylactic acid and 8kg of polyvinyl alcohol are used.
Example 17
The difference from example 9 is that: 0.1kg of titanium dioxide was also added to S1.
Example 18
The difference from example 9 is that: 0.12kg of titanium dioxide was also added to S1.
Example 19
The difference from example 9 is that: 0.14kg of titanium dioxide was also added to S1.
Example 20
The difference from the embodiment 1 is that: in S1, 14kg of polylactic acid and 10kg of polyvinyl alcohol are contained.
Example 21
The difference from the embodiment 2 is that: in S1, 14kg of polylactic acid and 10kg of polyvinyl alcohol are contained.
Example 22
The difference from the embodiment 3 is that: in S1, 14kg of polylactic acid and 10kg of polyvinyl alcohol are contained.
Example 23
This example describes the preparation of a gas column pouch with reference to fig. 1 and 2.
The preparation method of the air column bag comprises the following steps:
s1, two layers of degradable plastic films 2 with the same shape and size are stacked and superposed, and the explained plastic films are arranged in a rectangular shape;
s2, thermally sealing a plurality of air faucet valves 4 between the two layers of degradable plastic films 2, wherein the air faucet valves 4 are all positioned on the same side of the degradable plastic films 2 and are arranged at equal intervals along the length direction of the degradable plastic films 2;
s3, forming a plurality of air column chambers 3 by enabling the degradable plastic film 2 to correspond to the air faucet valves 4 through heat sealing, wherein the air column chambers 3 are rectangular, the length direction of the air column chambers 3 is parallel to the width direction of the degradable plastic film 2, three sides of the air column chambers 3 are sealed, and the air faucet valves 4 are used as air inlets;
and S4, ventilating the air column chamber 3 through the air nozzle valve 4 to form the air column coiled material 1, winding the air column coiled material 1 on an object, and fixing the air column coiled material 1 through an adhesive tape to form an air column bag.
Comparative example
Comparative example 1
The difference from example 9 is that: bee pollen is not added in S1.
Comparative example 2
The difference from example 9 is that: hydroxypropyl-beta-cyclodextrin is not added to S1.
Comparative example 3
The difference from example 9 is that: silk fibers are not added in the S1.
Comparative example 4
The difference from example 9 is that: hydroxypropyl-beta-cyclodextrin and silk fiber are not added in the S1.
Comparative example 5
The difference from example 9 is that: bee pollen and silk fiber are not added in the S1.
Comparative example 6
The difference from example 9 is that: bee pollen, hydroxypropyl-beta-cyclodextrin and silk fiber are not added in the S1.
TABLE 1 EXAMPLES AND COMPARATIVE EXAMPLES raw material Table (kg)
The performance test refers to GB/T1040.3-2006 determination part 3 of plastic tensile performance: test conditions for film and sheet test of tensile strength (MPa) of the degradable plastic mother pellets prepared in examples 1 to 22 and comparative examples 1 to 6, the shape and size of the sample refer to type 2 sample in 6.1.1, total length 150mm, width 10mm, thickness 50 μm, test speed 200mm/min, five sets of samples were set for each example or comparative example, and the average value was calculated after the test was completed.
The degree of disintegration (%) of the degradable plastic base pellets obtained in examples 1 to 22 and comparative examples 1 to 6 under the pilot-scale conditions for defining composting was measured with reference to GB/T19811-2005, determination of the degree of disintegration of plastic Material under the pilot-scale conditions for defining composting, and the degradable plastic base pellets were blown into films and cut to a size of 10cm x 50 μm before the measurement.
Table 2 table of performance test data
Combining example 9 and comparative examples 1-6 with table 2, it can be seen that only one of bee pollen, hydroxypropyl-beta-cyclodextrin and silk fiber is added to contribute little to the degradation speed, when the three are combined, the hydroxypropyl-beta-cyclodextrin and silk fiber absorb moisture to provide a wet environment to promote the propagation of microorganisms in the initial composting period, and bee pollen and silk fiber start to decompose to provide nutrients when the microorganisms start to propagate, so that the microorganisms are propagated in large quantity, and the degradation of plastics is effectively promoted. And when the strength of the plastic is reduced due to the addition of the bee pollen and the hydroxypropyl-beta-cyclodextrin, the silk fiber can reduce the strength reduction degree of the plastic, so that the plastic keeps certain strength and the service life of the plastic is prolonged.
By combining example 9 and examples 17-19 with table 2, it can be seen that by adding titanium dioxide as a photocatalyst, a period of photo-degradation is performed before compost degradation, so that part of macromolecules are decomposed into micromolecules, the difficulty of microbial degradation is reduced, and the degradation efficiency is effectively improved.
By combining examples 5-13 and table 2, it can be seen that the optimal proportion is selected by adjusting the addition amounts of the bee pollen, the hydroxypropyl-beta-cyclodextrin and the silk fiber, so that the degradation efficiency is effectively improved while the reduction of the strength of the plastic is reduced, and the degradation capability of the plastic is remarkably enhanced.
By combining example 9, example 14 and example 15 and table 2, it can be seen that the plastic strength is effectively improved and the influence of the moisture absorption of hydroxypropyl-beta-cyclodextrin on the overall strength of the plastic is reduced by adjusting the addition amount of alpha-cyclodextrin and selecting the addition ratio of the alpha-cyclodextrin to hydroxypropyl-beta-cyclodextrin.
It can be seen from the combination of example 2, example 9 and example 21 and table 2 that the addition amounts of the base materials, i.e., polylactic acid and polyvinyl alcohol, are adjusted to control the ratio of the base materials to the auxiliary components, thereby further increasing the degradation rate.
The present embodiment is only for explaining the present application, and it is not limited to the present application, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present application.
Claims (9)
1. The novel material gas column bag with strong degradation capability is characterized by being made of degradable plastics, wherein the degradable plastics comprise the following raw materials in parts by weight: 100-140 parts of polylactic acid, 6-10 parts of polyvinyl alcohol, 3-5 parts of nucleating agent, 1-3 parts of coupling agent, 1-3 parts of plasticizer and 7-11 parts of auxiliary components, wherein the auxiliary components comprise a nutrient component, a decomposition component and a toughening component, and the weight ratio of the nutrient component to the decomposition component for promoting the decomposition of the nutrient component to the toughening component is (3-5) to (2-4) to 2.
2. The new material gas column bag with strong degradation capability as claimed in claim 1, wherein the nutrient component is bee pollen, and the bee pollen is pulverized to have a particle size of 800 mesh.
3. The new material air column bag with strong degradation capability of claim 2, wherein the decomposition component is hydroxypropyl-beta-cyclodextrin.
4. The new material air column bag with strong degradability as claimed in claim 3, wherein the toughening component is silk fiber, and the weight ratio of the bee pollen to the hydroxypropyl-beta-cyclodextrin to the silk fiber is 4.
5. The new material gas column bag with strong degradation capability as claimed in claim 3, wherein the nucleating agent is alpha-cyclodextrin.
6. The new material gas column bag with strong degradation capability of claim 4, wherein the weight ratio of the nucleating agent to the nutritional components is 1.
7. The new material air column bag with strong degradation capability of claim 1, characterized in that, it also comprises 1-1.4 parts of photocatalyst.
8. The new material gas column bag with strong degradation capability of claim 1, wherein the preparation method of the degradable plastic comprises the following steps: drying polylactic acid and polyvinyl alcohol, mixing with other raw materials, and performing extrusion granulation to generate the degradable plastic master batch.
9. The method for preparing the air column bag with the new material and the strong degradation capability of claim 7 is characterized by comprising the following steps: blow the degradable plastics master batch into film, along a plurality of air cock valves of degradable plastics film length direction heat seal (4) between two-layer degradable plastics film, then correspond air cock valve (4) heat seal and cut apart into a plurality of gas column rooms (3) with degradable plastics film, gas column room (3) are rectangular shape and gas column room (3) length direction and are parallel with degradable plastics film width direction, fill gas through the breather valve and can make gas column coiled material (1) in to gas column room (3), thereby it forms the gas column bag to convolute gas column coiled material (1) fixedly on article.
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| CN202211435563.4A CN115746523A (en) | 2022-11-16 | 2022-11-16 | Novel material air column bag with strong degradation capability and preparation method thereof |
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| CN202211435563.4A CN115746523A (en) | 2022-11-16 | 2022-11-16 | Novel material air column bag with strong degradation capability and preparation method thereof |
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| CN113897040A (en) * | 2019-07-09 | 2022-01-07 | 中山市金群瑞科技有限公司 | Preparation method of degradable food packaging material with high mechanical strength |
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| KR20100108884A (en) * | 2009-03-30 | 2010-10-08 | 유종훈 | Preparation method of polymer fine particles using supercritical fluid |
| CN113897040A (en) * | 2019-07-09 | 2022-01-07 | 中山市金群瑞科技有限公司 | Preparation method of degradable food packaging material with high mechanical strength |
| CN114031909A (en) * | 2021-11-04 | 2022-02-11 | 浙江通力新材料科技股份有限公司 | Starch-based degradable desorption tube material and preparation method thereof |
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