CN215397441U - Vector lock xian mo - Google Patents
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- CN215397441U CN215397441U CN202120583780.2U CN202120583780U CN215397441U CN 215397441 U CN215397441 U CN 215397441U CN 202120583780 U CN202120583780 U CN 202120583780U CN 215397441 U CN215397441 U CN 215397441U
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Abstract
The utility model relates to the technical field of packaging materials, in particular to a vector fresh-keeping locking film, wherein the vector film at least comprises a three-layer structure, and the three-layer structure sequentially comprises a light extinction layer, a base material layer and an easy-to-tear layer from top to bottom; wherein, the substrate layer includes three layer construction at least, and top-down is first easily tearing antiseized layer, barrier layer, the antiseized layer of second easily tearing in proper order. The utility model provides a vector preservative film, which is characterized in that different types of functional film layers are selectively overlapped/arranged in different spatial directions, or the functional film layers with different thicknesses are overlapped/arranged, and then co-extrusion stretching is carried out, so that molecules in the stretched film have specific orientation in the horizontal direction, the formed film has excellent high barrier property integrally, and the polyamide composite film has higher experience in the use of specific products.
Description
Technical Field
The utility model relates to the technical field of packaging materials, in particular to a vector preservative film.
Background
With the development of the times, more and more requirements are put on the functionality of the package. In order to prolong the shelf life of the contents, it is required to have good barrier properties; the packaging box is convenient for a customer to open the packaging box and has better experience feeling, and the packaging box is required to have better easy tearing and tearing property; for better visual perception, it is desirable to have a good antifogging effect when frozen; in order to save cost and protect environment, it is required to have light weight and thin thickness while ensuring performance; however, to date, few films have combined these properties.
Due to the advantages of excellent mechanical property, gas and aroma barrier property, oil resistance, chemical solvent resistance, no toxicity and the like, the BOPA film is a large packaging material which is widely applied to a plurality of industries and fields such as food, electronics, medicine packaging and the like after BOPP and BOPET, but various defects and shortcomings still exist in the actual use of the BOPA film.
For example, the high-barrier plastic composite packaging film with application number 200520017209.5, published 2006, 5, month and 31, discloses a high-barrier plastic composite packaging film, which is structurally characterized in that a printing layer and a barrier layer are sequentially covered on a substrate layer, and a protective layer is covered on the surface layer, so that the film material has good barrier property, low cost, good light-shielding property, no toxic substances and good heat-seal sealing property; the packaging bag is suitable for packaging liquefied food, fresh-keeping food, medical products, electronic elements and military products, but has the defects of easy tearing and easy uncovering.
The application number is 201720466369.0, the publication date is 2018, 1 and 26, and the high-barrier can top easy-to-tear sealing film is of a multilayer composite structure, the multilayer composite structure comprises at least one PET layer, the multilayer composite structure sequentially comprises a pattern surface layer, a barrier middle layer and an SPE easy-to-tear inner layer from outside to inside, and the barrier middle layer comprises a barrier functional layer and at least one extrusion-compounded SPE layer; the barrier function layer is one selected from a PET barrier composite film with a barrier coating and/or a barrier coating and an aluminum foil. This high resistant separates tank deck easily takes off sealing membrane is rational in infrastructure, through set up at least one deck crowded compound SPE layer and separation functional layer in sealing membrane, forms the separation effect of reinforcing in the separation intermediate level, but it still exists not enoughly in the aspect of easy tear nature etc..
Thus, vector films are beginning to appear in the market, and new material products, vector films, with specific mechanical strength and performance in a specific direction are obtained by changing the combination of molecular orientation or material layers;
at present, through research, the common barrier film, the easy-to-tear film and the like are found to have a certain setting rule based on different arrangement modes in a vertical space, and after different structures and different functional layers are arranged, the overall performance of the barrier film and the easy-to-tear film is changed.
Wherein, the existing vector film comprises a vector fresh-keeping film, a vector second tearing film and the like;
the vector preservative film has more excellent oxygen barrier property by changing the overlapping mode of the barrier film layer and other inner and outer layer structures, so that the addition amount of a food additive can be properly reduced, the shelf life and the shelf life of food are prolonged, the fragrance is excellent, and the original flavor of the food is kept for a long time; the composite material has better composite strength with other materials (PE, CPP and the like); the thinner thickness obviously saves the use of materials, and the materials are more environment-friendly.
The vector second tear film is suitable for various composite structures, can be directly compounded with common PE/CPP/aluminum foils with different specifications and the like, and keeps the direct tear performance, excellent mechanical property, good transparency and glossiness.
SUMMERY OF THE UTILITY MODEL
In order to solve the problem that the existing film is not enough in easy tearing/easy uncovering/blocking performance, the utility model provides a vector freshness-retaining film which at least comprises a three-layer structure, wherein the three-layer structure sequentially comprises a light extinction layer, a base material layer and an easy uncovering layer from top to bottom;
wherein, the substrate layer includes three layer construction at least, and top-down is first easily tearing antiseized layer, barrier layer, the antiseized layer of second easily tearing in proper order.
In addition to the above structure, the barrier layer may be an EVOH layer.
On the basis of above-mentioned structure, furtherly, still including locating the first layer of easily tearing between first antiseized layer of easily tearing and the barrier layer and locate the barrier layer and the second of easily tearing between the antiseized layer of second easily tear the layer.
On the basis of the structure, the thickness of the first easy-to-tear layer and the thickness of the second easy-to-tear layer are both 3-5 micrometers.
On the basis of the structure, a second extinction layer is further arranged between the substrate layer and the easy-to-uncover layer.
On the basis of the structure, the thickness of the extinction layer and the thickness of the second extinction layer are both 1-3 mu m.
In addition to the above structure, the thickness of the substrate layer is 20 to 25 μm.
On the basis of the structure, the thickness of the barrier layer is 4-8 mu m.
Preferably, the thickness proportion of extinction layer, first easily tear layer, the layer is easily torn to the second, substrate layer and barrier layer is 1 ~ 3: 3-5: 3-5: 20-25: 4-8; the polyamide composite film is more excellent in the aspect of easy tearing performance by setting the proportion of each layer.
On the basis of the structure, further, the surface of the first easy-to-tear anti-sticking layer is subjected to corona treatment.
On the basis of the structure, the easy-uncovering layer is a one-component solvent type polyester coating.
On the basis of the structure, the gluing amount of the easy-to-uncover layer is 4-5 g/m2。
Compared with the prior art, the vector fresh-keeping film has the following advantages:
according to the vector film structure provided by the utility model, the base material layer provides good barrier property, easy tearing property and extinction property for the whole package, so that the shelf life is prolonged and a higher experience feeling is brought to customers; the easy-to-tear layer provides good heat sealability, easy-to-tear property and antifogging property for the whole package, and can provide better touch and visual feeling for customers while reducing the composite processes;
therefore, the vector freshness-retaining film provided by the utility model integrates multiple functions, has good blocking and tearing properties, and also has good heat sealing, easy uncovering properties and good visual effects.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a first schematic structural view of a vector-locked preservative film provided by the present invention;
FIG. 2 is a schematic structural diagram of a vector-locked preservative film according to the present invention;
FIG. 3 is a schematic structural view of a vector-locked preservative film according to the present invention;
FIG. 4 is a fourth schematic structural view of a vector-locked preservative film according to the present invention;
fig. 5 is a schematic structural diagram of a vector-locked preservative film provided by the present invention.
Reference numerals:
10 extinction layer 20 substrate layer 21 first easy-to-tear anti-sticking layer
22 barrier layer 23 second easy-to-tear anti-sticking layer 24 first easy-to-tear layer
25 second easy-to-tear layer 30 easy-to-tear layer 40 second matte layer
50 common film layer
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, 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 some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
As shown in fig. 1-5, the present invention provides a vector freshness-retaining film, which at least comprises a three-layer structure, wherein the three-layer structure comprises, from top to bottom, a matting layer 10, a substrate layer 20 and an easy-to-tear layer 30;
wherein, the substrate layer 20 includes three layer construction at least, and top-down is first easily tearing antiseized layer 21, barrier layer 22, the antiseized layer 23 of second easily tearing in proper order.
In specific implementation, as shown in fig. 1, the vector freshness-retaining film includes at least three layers, which are, from top to bottom, a light-eliminating layer 10, a substrate layer 20 and a peeling layer 30;
the matte layer 10 can adopt a BOPA matte film disclosed in patent document ZL201010596162.8 BOPA matte film and a preparation method thereof, and the matte film has good optical properties, such as low glossiness, low haze and the like, or adopts other prior art or commercially common matte nylon materials;
the extinction layer 10 is arranged to avoid deterioration of products in the packaging bag due to strong light, and meanwhile, soft, comfortable and hazy visual effects are brought to people, and the purchasing desire of consumers can be stimulated.
The barrier layer 22 may be an EVOH layer or an MXD6 layer, and the EVOH layer may be a commercially available EVOH material such as a polyethylene-vinyl alcohol copolymer;
the substrate layer 20 at least comprises a three-layer structure, and a first easy-to-tear anti-sticking layer 21, a barrier layer 22 and a second easy-to-tear anti-sticking layer 23 are sequentially arranged from top to bottom;
the first easy-to-tear anti-sticking layer 21 and the second easy-to-tear anti-sticking layer 23 can adopt a high-barrier type linear easy-to-tear nylon film and a preparation method thereof disclosed in patent application document 'a high-barrier type linear easy-to-tear nylon film and a preparation method thereof' with application number 202010364782.2, wherein the film layer structure of the high-barrier type linear easy-to-tear nylon film comprises a base film, a barrier evaporation layer and a surface coating; the base film is a three-layer co-extrusion biaxially oriented nylon film which is A, B, C layers from top to bottom in sequence; the layer A and the layer C are both composed of 67-79.5% of nylon 6, 20-30% of special nylon composition and 0.5-3% of anti-sticking nylon master batch; the B layer is composed of 60-70% of nylon 6 and 30-40% of special nylon composition, has excellent easy-tearing and anti-sticking performance, or adopts other easy-tearing anti-sticking layers commonly used in the prior art or the market.
The easy-to-tear layer 30 can be made of an easy-to-tear film with constant heat sealing strength and firm sealing closure disclosed in patent document 200910056115.1, wherein the easy-to-tear film with constant heat sealing strength and firm sealing closure comprises a heat sealing layer, a core layer and a corona layer, and is prepared by a casting process of co-extruding the easy-to-tear film with a T-shaped die head through a plurality of extruders, has excellent easy-to-tear performance and a certain heat sealing effect, or is made of other easy-to-tear film materials or easy-to-tear coatings commonly used in the prior art or on the market.
According to the vector lock fresh film layer structure provided by the utility model, the extinction layer 10 is beneficial to avoiding deterioration of products in the packaging bag due to strong illumination, soft, comfortable and hazy visual effects are provided for people, the purchasing desire of consumers can be stimulated, the base material layer 20 provides good barrier property and easy tearing property for the whole packaging, and the shelf life is prolonged while higher experience feeling is provided for customers; the easy-to-tear layer 30 provides good heat sealability, easy-to-tear property and antifogging property for the whole package, and can provide better touch and visual feeling for customers while reducing the composite processes;
in order to better improve the corresponding performance of the film, the vector freshness-locking film integrating multiple functions is obtained, the molecules in the product also have specific orientation by combining the arrangement mode of different film layer structures in a vertical space with the horizontal direction and adopting co-extrusion and double-drawing, and therefore the obtained film has better freshness-locking performance.
Preferably, the anti-sticking film further comprises a first easy-tearing layer 24 arranged between the first easy-tearing anti-sticking layer 21 and the barrier layer 22 and a second easy-tearing layer 25 arranged between the barrier layer 22 and the second easy-tearing anti-sticking layer 23.
In specific implementation, as shown in fig. 2, the first easy-to-tear layer 24 and the second easy-to-tear layer 25 can adopt a linear easy-to-tear aluminized nylon film and a preparation method thereof disclosed in the patent application document "a linear easy-to-tear aluminized nylon film and a preparation method thereof" with the application number of 202010364784.1, wherein the film structure of the linear easy-to-tear aluminized nylon film includes a base film and an aluminum vapor deposition layer; the base film is a three-layer co-extrusion biaxially oriented nylon film which is A, B, C layers from top to bottom in sequence; the layer A and the layer C are both composed of 67-79.5% of nylon 6, 20-30% of special nylon composition and 0.5-3% of anti-sticking nylon master batch; the layer B consists of 60 to 70 percent of nylon 6 and 30 to 40 percent of special nylon composition; the special nylon composition contains MXD6-PA66 copolymer, long carbon chain nylon, nylon copolymer and compatilizer; the film has the advantages of excellent oxygen barrier performance, easy tearing of straight lines and the like, or adopts other easy-tearing layers commonly used in the prior art or the market.
Preferably, a second matte layer 40 is further disposed between the substrate layer 20 and the easy-release layer 30.
In specific implementation, as shown in fig. 3-4, a second matte layer 40 is further disposed between the substrate layer 20 and the easy-to-tear layer 30, and the second matte layer 40 may be made of a film material the same as that of the matte layer 10, so as to form a 7-layer structure of the matte layer 10, the first easy-to-tear anti-sticking layer 21, the first easy-to-tear layer 24, the barrier layer 22, the second easy-to-tear anti-sticking layer 25, the second easy-to-tear anti-sticking layer 23, and the second matte layer 40, and under the layered structure, a co-extrusion and bidirectional stretching manner may be implemented to form a composite film structure, or a bonding or tape casting manner may be implemented to combine the layers, and further, the easy-to-tear layer 30 is obtained by coating under the layered structure;
therefore, the vector film obtained after the molecular orientation in the product is changed by combining the arrangement mode of different film layer structures in the vertical space with the horizontal direction by adopting co-extrusion and double-drawing has better freshness locking performance; as another alternative, a common film layer 50 may be disposed between the substrate layer 20 and the release layer 30.
In a specific embodiment, as shown in fig. 5, the common film layer 50 may be a commercially available polyamide film.
Preferably, the thickness of the extinction layer 10 is 1-3 μm.
Preferably, the thickness of the second extinction layer 40 is 1-3 μm.
Preferably, the thickness of the substrate layer 20 is 20 to 25 μm.
Preferably, the thickness of the barrier layer 22 is 4 to 8 μm.
Preferably, the thickness of the first easy-to-tear layer 24 is 3-5 μm.
Preferably, the thickness of the second easy-to-tear layer 25 is 3-5 μm.
During concrete implementation, through the manufacturing cost of many times of experimental contrast combination film can know, the thickness of extinction layer 10 and second extinction layer 40 is 1 ~ 3 mu m, the first thickness that easily tears layer 24 and second and easily tear layer 25 is 3 ~ 5 mu m, the thickness of substrate layer 20 is 20 ~ 25 mu m, under the condition that the thickness of barrier layer 22 is 4 ~ 8 mu m for the gross thickness of this vector lock xianxian is less, more economical and practical, accords with market demand, sexual valence relative altitude.
Preferably, the surface of the first easy-peel release layer 21 is corona-treated.
During specific implementation, can carry out corona treatment, especially upper surface to first easily tearing antiseized layer 21 surface, corona treatment has passed the back, can effectively improve first easily tear the adhesive force on antiseized layer 21 surface to make easily take off layer 30 and adhere to on the upper surface of first easily tearing antiseized layer 21 better, thereby form and easily take off layer 30.
Preferably, the release layer 30 is a one-component solvent-based polyester coating.
In specific implementation, the existing coating process is adopted, the coating material is uniformly coated on the upper surface of the substrate layer 20, and the coating material is dried, specifically, a single-component solvent type dry compounding polyester heat sealing coating or other common easy-to-uncover coating materials in the prior art or on the market are adopted.
Preferably, the amount of the glue applied to the easy-to-tear-off layer 30 is 4-5 g/m2。
In specific implementation, the easy-to-tear layer 30 can be coated on the surface of the substrate layer 20 in a coating mode, and multiple tests compare the easy-to-tear effect and the production cost, so that when the easy-to-tear layer 30 is coated at 4-5 g/m2Coating one side of the substrate with the sizing agent to make the coatingThe vector fresh-keeping film has the advantages of smaller total thickness, more economical and practical performance, accordance with market demands and high cost performance.
The present invention provides the following examples:
example 1
A vector fresh-keeping film has a 4-layer structure, as shown in figure 4, the vector fresh-keeping film sequentially comprises an extinction layer 10, a substrate layer 20, a second extinction layer 40 and an easy-to-tear layer 30 from top to bottom;
the extinction layer 10 and the second extinction layer 40 both adopt extinction films prepared from patent document BOPA extinction film and preparation method thereof with patent number ZL 201010596162.8;
the substrate layer 20 sequentially comprises a first easy-to-tear anti-sticking layer 21, a first easy-to-tear layer 24, a blocking layer 22, a second easy-to-tear layer 25 and a second easy-to-tear anti-sticking layer 23 from top to bottom;
the first easy-to-tear anti-sticking layer 21 and the second easy-to-tear anti-sticking layer 23 are both films prepared from a high-barrier type linear easy-to-tear nylon film and a preparation method thereof with the application number of 202010364782.2;
the first easy-to-tear layer 24 and the second easy-to-tear layer 25 are both films prepared from a linear easy-to-tear aluminized nylon film and a preparation method thereof with the application number of 202010364784.1;
the barrier layer 22 adopts an EVOH layer;
the easy-uncovering layer 30 adopts a single-component solvent-based dry-type composite polyester heat-sealing coating;
the thickness of the extinction layer 10 and the thickness of the second extinction layer 40 are both 2 micrometers;
the total thickness of the substrate layer 20 is 23 μm, wherein the thicknesses of the first easy-to-tear anti-sticking layer 21 and the second easy-to-tear anti-sticking layer 23 are both 4.5 μm, the thicknesses of the first easy-to-tear layer 24 and the second easy-to-tear layer 25 are both 4 μm, and the thickness of the barrier layer 22 is 6 μm;
wherein, the extinction layer 10, the substrate layer 20 and the second extinction layer 40 are formed by co-extrusion and two-way stretching;
example 2
A vector fresh-keeping film has a 4-layer structure, as shown in figure 4, the vector fresh-keeping film sequentially comprises an extinction layer 10, a substrate layer 20, a second extinction layer 40 and an easy-to-tear layer 30 from top to bottom;
the extinction layer 10 and the second extinction layer 40 both adopt extinction films prepared from patent document BOPA extinction film and preparation method thereof with patent number ZL 201010596162.8;
the substrate layer 20 sequentially comprises a first easy-to-tear anti-sticking layer 21, a first easy-to-tear layer 24, a blocking layer 22, a second easy-to-tear layer 25 and a second easy-to-tear anti-sticking layer 23 from top to bottom;
the first easy-to-tear anti-sticking layer 21 and the second easy-to-tear anti-sticking layer 23 are both films prepared from a high-barrier type linear easy-to-tear nylon film and a preparation method thereof with the application number of 202010364782.2;
the first easy-to-tear layer 24 and the second easy-to-tear layer 25 are both films prepared from a linear easy-to-tear aluminized nylon film and a preparation method thereof with the application number of 202010364784.1;
the barrier layer 22 adopts an EVOH layer;
the easy-uncovering layer 30 adopts a single-component solvent-based dry-type composite polyester heat-sealing coating;
the thickness of the extinction layer 10 and the thickness of the second extinction layer 40 are both 2 micrometers;
the total thickness of the substrate layer 20 is 23 μm, wherein the thicknesses of the first easy-to-tear anti-sticking layer 21 and the second easy-to-tear anti-sticking layer 23 are both 4.5 μm, the thicknesses of the first easy-to-tear layer 24 and the second easy-to-tear layer 25 are both 4 μm, and the thickness of the barrier layer 22 is 6 μm;
the matte layer 10, the substrate layer 20 and the second matte layer 40 are formed by tape casting;
the utility model tests the relevant performance of the above embodiments, and the specific result data is shown in the following table:
table 1 examples performance test table
As can be seen from the above table, the embodiments 1-2 provided by the utility model all have excellent barrier properties, and meanwhile, according to the embodiment 1, the vector film obtained by changing the molecular orientation in the product by combining the arrangement modes of different film layer structures in the vertical space with the horizontal direction and adopting co-extrusion and double-drawing has better freshness locking performance;
according to the utility model, the Polyamide (PA) film layer and other materials are organically combined by the existing molecular compatibility design method, so that the other materials are firmly embedded in the polyamide, and different types of functional film layers are selectively overlapped/arranged in different spatial directions or the functional film layers with different thicknesses are overlapped/arranged, and then the co-extrusion stretching is further carried out, so that the molecules in the stretched film have specific orientation in the horizontal direction, and the formed film has more excellent high barrier property as a whole, so that the prepared polyamide composite film has higher experience in the use of specific products.
Although terms such as vector film, matte layer, substrate layer, first peel ply, barrier layer, second peel ply, first peel ply, second matte layer, release layer, common film layer, etc. are used more often herein, the possibility of using other terms is not excluded. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed as being without limitation to any additional limitations that may be imposed by the spirit of the present invention.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the utility model has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. A vector lock xian membrane which characterized in that: the decorative film at least comprises a three-layer structure, wherein the three-layer structure sequentially comprises a light extinction layer (10), a base material layer (20) and an easy-to-uncover layer (30) from top to bottom;
the base material layer (20) at least comprises a three-layer structure, and a first anti-sticking layer (21), a blocking layer (22) and a second anti-sticking layer (23) which are easy to tear are sequentially arranged from top to bottom.
2. The vector lock preservative film according to claim 1, wherein: the barrier layer (22) is an EVOH layer.
3. The vector lock wrap of claim 1 or 2, wherein: still including locating first easily tear antiseized layer (21) and barrier layer (22) between first easily tear layer (24) and locate barrier layer (22) and the second easily tear antiseized layer (23) between second and easily tear layer (25).
4. The vector lock preservative film according to claim 3, wherein: the thickness of the first easy-tearing layer (24) and the thickness of the second easy-tearing layer (25) are both 3-5 microns.
5. The vector lock preservative film according to claim 1, wherein: and a second extinction layer (40) is also arranged between the substrate layer (20) and the easy-to-uncover layer (30).
6. The vector lock preservative film according to claim 5, wherein: the thickness of the extinction layer (10) and the thickness of the second extinction layer (40) are both 1-3 mu m.
7. The vector lock preservative film according to claim 1, wherein: the thickness of the substrate layer (20) is 20-25 mu m.
8. The vector lock preservative film according to claim 1, wherein: the thickness of the barrier layer (22) is 4-8 mu m.
9. The vector lock preservative film according to claim 1, wherein: the surface of the first easy-to-tear anti-sticking layer (21) is subjected to corona treatment.
10. The vector lock preservative film according to claim 1, wherein: the easy-uncovering layer (30) is a single-component solvent type polyester coating.
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| CN202120583780.2U CN215397441U (en) | 2021-03-19 | 2021-03-19 | Vector lock xian mo |
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