CN117002863A - Packaging film, use thereof and baled article - Google Patents
Packaging film, use thereof and baled article Download PDFInfo
- Publication number
- CN117002863A CN117002863A CN202210469627.6A CN202210469627A CN117002863A CN 117002863 A CN117002863 A CN 117002863A CN 202210469627 A CN202210469627 A CN 202210469627A CN 117002863 A CN117002863 A CN 117002863A
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- Prior art keywords
- packaging
- packaging film
- longitudinal
- sleeve
- equal
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- 239000012785 packaging film Substances 0.000 title claims abstract description 75
- 229920006280 packaging film Polymers 0.000 title claims abstract description 75
- 238000004806 packaging method and process Methods 0.000 claims abstract description 83
- 238000000034 method Methods 0.000 claims description 8
- 239000002131 composite material Substances 0.000 claims description 4
- -1 silver ions Chemical class 0.000 claims description 4
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 claims description 3
- PTFCDOFLOPIGGS-UHFFFAOYSA-N Zinc dication Chemical compound [Zn+2] PTFCDOFLOPIGGS-UHFFFAOYSA-N 0.000 claims description 3
- 229920001684 low density polyethylene Polymers 0.000 claims description 3
- 239000004702 low-density polyethylene Substances 0.000 claims description 3
- 239000002994 raw material Substances 0.000 claims description 3
- 229910052709 silver Inorganic materials 0.000 claims description 3
- 239000004332 silver Substances 0.000 claims description 3
- 229920000092 linear low density polyethylene Polymers 0.000 claims description 2
- 239000004707 linear low-density polyethylene Substances 0.000 claims description 2
- 239000005022 packaging material Substances 0.000 claims description 2
- 229920006728 mPE Polymers 0.000 claims 1
- 239000000123 paper Substances 0.000 description 15
- 238000007789 sealing Methods 0.000 description 7
- 230000000052 comparative effect Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 238000012856 packing Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 239000004712 Metallocene polyethylene (PE-MC) Substances 0.000 description 3
- 238000005336 cracking Methods 0.000 description 3
- 239000013543 active substance Substances 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 235000013305 food Nutrition 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012858 packaging process Methods 0.000 description 2
- 229920010126 Linear Low Density Polyethylene (LLDPE) Polymers 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003115 biocidal effect Effects 0.000 description 1
- 239000003139 biocide Substances 0.000 description 1
- 239000011111 cardboard Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005538 encapsulation Methods 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000008267 milk Substances 0.000 description 1
- 210000004080 milk Anatomy 0.000 description 1
- 235000013336 milk Nutrition 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000009864 tensile test Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
- B65B25/00—Packaging other articles presenting special problems
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
- B65B3/00—Packaging plastic material, semiliquids, liquids or mixed solids and liquids, in individual containers or receptacles, e.g. bags, sacks, boxes, cartons, cans, or jars
- B65B3/04—Methods of, or means for, filling the material into the containers or receptacles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
- B65B43/00—Forming, feeding, opening or setting-up containers or receptacles in association with packaging
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
- B65B53/00—Shrinking wrappers, containers, or container covers during or after packaging
- B65B53/02—Shrinking wrappers, containers, or container covers during or after packaging by heat
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D25/00—Details of other kinds or types of rigid or semi-rigid containers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D65/00—Wrappers or flexible covers; Packaging materials of special type or form
- B65D65/02—Wrappers or flexible covers
- B65D65/22—Details
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D65/00—Wrappers or flexible covers; Packaging materials of special type or form
- B65D65/38—Packaging materials of special type or form
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D85/00—Containers, packaging elements or packages, specially adapted for particular articles or materials
- B65D85/70—Containers, packaging elements or packages, specially adapted for particular articles or materials for materials not otherwise provided for
- B65D85/72—Containers, packaging elements or packages, specially adapted for particular articles or materials for materials not otherwise provided for for edible or potable liquids, semiliquids, or plastic or pasty materials
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Packages (AREA)
Abstract
The application relates to the field of packaging, and discloses a packaging film, application thereof and a bundling piece. The packaging film has a longitudinal tensile strength of not less than 40MPa, a transverse tensile strength of not less than 30MPa, a longitudinal elongation at break of not less than 200%, a transverse elongation at break of not less than 400%, a longitudinal shrinkage at 160 ℃ of 60-90% and a transverse shrinkage at 160 ℃ of 15-35%.
Description
Technical Field
The application relates to the field of packaging, in particular to a packaging film and application and a bundling piece thereof.
Background
Paper packages, such as milk boxes, are typically transported by the manufacturer of the package to a client, where the package is used to package the product. In the transportation of packing carton, utilize the packaging film to pack a plurality of packing carton packing to the transportation is convenient, and can protect the packing carton in the transportation, prevents its damage. Because the performances of the packaging films are different, in the actual packaging process, the problems that the packaging films are damaged after packaging, the sealing bonding strength is too low, the cracking is caused, the shrinkage performance is poor, the packaging box is loose and the like usually exist.
Disclosure of Invention
The application discloses a packaging film, application and a bundling piece thereof, and the packaging film is used for packaging a paper packaging box, so that the packaging quality can be improved, and the problems of breakage and scattering are reduced.
In order to achieve the above purpose, the present application provides the following technical solutions:
a packaging film has a longitudinal tensile strength of not less than 40MPa, a transverse tensile strength of not less than 30MPa, a longitudinal elongation at break of not less than 200%, a transverse elongation at break of not less than 400%, a longitudinal shrinkage at 160 ℃ of 60-90% and a transverse shrinkage at 160 ℃ of 15-35%.
Further, the thickness of the packaging film is 20-50 μm.
Further, the packaging film has a density of 0.905 to 0.935g/cm 2 。
Further, the packaging film comprises the following main raw materials: LDPE, LLDPE, mPE.
Further, the packaging film contains one or two of silver ions and zinc ions.
Such as the use of packaging films for transporting paper packaging materials.
A bundle comprising a packaging sleeve and an outer package, the bundle comprising:
-a plurality of packaging sleeves made of composite material, and
an overwrap surrounding the packaging sleeve,
wherein each packaging sleeve has a front side and a rear side,
wherein the front side and the rear side of each packaging sleeve are separated from each other by a folded edge along which the packaging sleeve is folded flat,
-wherein each packaging sleeve has two openings arranged on opposite sides of the packaging sleeve, and
wherein each packaging sleeve has a longitudinal seam connecting two edges of the composite material to form a circumferential packaging sleeve,
the outer package is made of a packaging film, the longitudinal tensile strength of the packaging film is more than or equal to 40MPa, the transverse tensile strength of the packaging film is more than or equal to 30MPa, the longitudinal elongation at break is more than or equal to 200%, the transverse elongation at break is more than or equal to 400%, the longitudinal shrinkage at 160 ℃ is 65% -90%, and the transverse shrinkage at 160 ℃ is 15% -35%.
By adopting the technical scheme of the application, the beneficial effects are as follows:
the packaging film is used for packaging the paper packaging box in the transportation process, so that the packaging quality can be improved, and the problems that the quality of the paper packaging box is damaged due to breakage of the packaging film or the paper packaging box is loose due to poor shrinkage of the packaging film are solved.
The bundling piece provided by the application is made of the packaging film with specific tensile strength, elongation at break and shrinkage, so that the bundling piece can not be packaged and damaged in the packaging process and can be packaged loosely, the bundling piece can keep higher integrity and regularity, the packaging sleeve is prevented from being damaged due to the damage of the outer packaging, and the risk-avoiding packaging sleeve can be scattered in the transportation process.
Drawings
Fig. 1 is a schematic structural diagram of a packaging unit according to an embodiment of the present application;
FIG. 2 is a schematic diagram of a package unit according to the present application;
FIG. 3 is a schematic diagram of another package unit according to the present application;
FIG. 4 is a schematic view of a construction of a blank for forming a packaging sleeve;
fig. 5 is a schematic view of a packaging sleeve in a flat folded condition.
Detailed Description
The technical solutions of the embodiments of the present application will be clearly and completely described below in conjunction with the embodiments of the present application, and it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
It should be noted that: in the present application, all embodiments and preferred methods of implementation mentioned herein may be combined with each other to form new solutions, unless otherwise specified. In the present application, all technical features mentioned herein and preferred features may be combined with each other to form new technical solutions, unless otherwise specified. In the present application, the percentage (%) or parts refer to weight percentage or parts by weight relative to the composition unless otherwise specified. In the present application, the components or preferred components thereof may be combined with each other to form a new technical solution, unless otherwise specified. In the present application, unless otherwise indicated, the numerical ranges "a-b" represent shorthand representations of any combination of real numbers between a and b, where a and b are both real numbers. For example, the numerical range "6-22" means that all real numbers between "6-22" have been listed throughout, and "6-22" is only a shorthand representation of a combination of these values. The "range" disclosed herein may take the form of a lower limit and an upper limit, which may be one or more lower limits and one or more upper limits, respectively. In the present application, each reaction or operation step may be performed sequentially or sequentially unless otherwise indicated. Preferably, the reaction processes herein are performed sequentially.
Unless otherwise defined, the technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art. In addition, any method or material similar or equivalent to those described may be used in the present application.
The application provides a packaging film, wherein the longitudinal tensile strength of the packaging film is more than or equal to 40MPa, the transverse tensile strength is more than or equal to 30MPa, the longitudinal elongation at break is more than or equal to 200%, the transverse elongation at break is more than or equal to 400%, the longitudinal shrinkage at 160 ℃ is 60% -90%, and the transverse shrinkage at 160 ℃ is 15% -35%.
Wherein, the longitudinal (machine direction, MD) tensile strength of the packaging film can be, for example, 40MPa, 45MPa, 47MPa, 50MPa, 52MPa, 55MPa, 60MPa, 65MPa or the like; the transverse direction (transverse direction, TD) tensile strength of the packaging film may be, for example, 30MPa, 35MPa, 37MPa, 40MPa, 42MPa, 45MPa, 50MPa, 55MPa, or the like; the packaging film may have an elongation at break in the machine direction of, for example, 200%, 250%, 260%, 270%, 280%, 290%, 300% or 310%, etc.; the packaging film may have an elongation at break in the transverse direction of 400%,500%,600%, 610%, 620%, 630%, 640%, 650% or 660%, for example; the packaging film may have a longitudinal shrinkage at 160 ℃ of, for example, 65%, 70%,75%,80%, 81%, 82%, 83%, 84%, 85%, 86%, 87%, 88%, 89%, or the like; the packaging film may have a transverse shrinkage at 160 ℃ of, for example, 15%, 20%, 21%, 22%, 23%, 24%, 25%, 26%, 27%, 28%, 29%, 30%, 35%, or the like. The tensile test method (e.g. tensile strength and elongation at break) was GB T1040.3, the sample being a long strip specimen, width 15mm, tensile speed 500mm/min. The shrinkage test method is GBT 13519-2016, and the shrinkage temperature is 160 ℃.
In some embodiments, the packaging film has a machine direction shrinkage at 160 ℃ that is greater than the transverse direction shrinkage of the packaging film at 160 ℃. In some embodiments, the ratio of the machine direction shrinkage of the packaging film at 160 ℃ to the transverse direction shrinkage of the packaging film at 160 ℃ is 8:1 to 1.7: 1.
In one embodiment, the packaging film has a thickness of 20-50 μm.
In one embodiment, the packaging film has a density of 0.905 to 0.935g/cm 2 。
In one embodiment, the packaging film comprises the following main raw materials: one or more of linear polyethylene (LDPE), linear Low Density Polyethylene (LLDPE) and metallocene polyethylene (mPE).
In one embodiment, the packaging film contains one or both of silver ions and zinc ions.
The packaging film can be used for transporting and packaging paper packaging boxes. Wherein, in the process of transporting and packaging, a plurality of paper packaging boxes can be arranged, and the plurality of paper packaging boxes are packaged by the packaging film after being laminated in a sheet structure. Wherein, a group of paper packaging boxes can be packaged into a packaging unit with a cuboid structure by the packaging film, the length of the packaging unit can be 300-1000mm, the width can be 20-100mm, and the height can be 30-500mm.
The thickness of the packaging film may be, for example, 20-50 μm. In the process of forming a packaging unit, a plurality of paper packaging boxes can be overlapped together in a sheet form, and the paper packaging boxes are automatically packaged by a packaging table after being transported to the packaging table of packaging equipment on a driving belt and subjected to thermal shrinkage. After packaging, the thickness change of the packaging film is not more than 5%, the flexibility of the packaging unit is not more than 3mm, the packaging strength of the packaging film after heat sealing is not less than 45N/mm, the length change range of the packaged product is within +/-10 mm, and the packaging film is free from puncture and cracking at the sealing position and free from unpacking.
The packaging film of the present application will be described in further detail with reference to examples and comparative examples.
Examples 1 to 4 and comparative examples 1 to 3 are each a packaging film whose performance parameters are shown in Table 1.
TABLE 1
The same number of paper packages are respectively packaged with the above packaging films, and fig. 1 is a schematic structural diagram of a packaging unit, and as shown in fig. 1, the packaging unit has a length l of 590mm, a width w of 91mm, and a height h of 176mm. Each of the example and comparative example packaging films corresponds to 50 sets of packaging units. The sizes of the package units corresponding to the respective examples and comparative example packaging films were respectively tested and checked for abnormal appearance problems. The test results are shown in Table 2.
TABLE 2
As can be seen from the packaging test data in Table 2, the packaging film of the type defined by the application is used for packaging the paper packaging box, and the film thickness, the sealing strength, the ratio of the film to be pierced, the bending degree, the unpacking ratio and the packaging length after packaging all meet the requirements, while the packaging films of comparative examples 1-3 all have the problems of high piercing ratio and exceeding bending degree in a certain ratio. Therefore, the packaging film defined by the application can better solve the problems of package cracking, package loosening and the like in the current package.
Fig. 2 and 3 show a specific embodiment of the encapsulation unit. In fig. 2 and 3, the outer package 15 is formed of an elastic packaging film 17. The packaging film 17 may have one weld 18 or may also have multiple welds 18 (e.g., two welds 18 disposed on opposite sides). The protruding ends 19 of the packaging film 17 may be redirected at both end sides of the packaging sleeve assembly 16 by means of hot air. For this purpose, at both end sides of the packaging sleeve assembly 16, four hot air nozzles 20A, 20B, 20C and 20D are preferably arranged, of which only the front side nozzles are shown. The action on the protruding end 19 of the packaging film 17 results in the protruding end 19 abutting against the end face of the packaging sleeve assembly 16 and being able to be welded to each other at the end face, as can be seen in fig. 3, in which a complete bundle 14 with a closed end is shown. Since the amount of material of the welded end of the packaging film 17 is relatively large, there is an irregularly formed structure in the center area of the end side, however, the structure is harmless to the function of the outer package. It can also be seen that the weld seam 18 is folded over on the end sides on both sides of the bale 14. Preferably, hot air is first supplied to the opposing nozzles 20A and 20B in order to apply the protruding upper and lower ends of the packaging film 17 to the end sides of the packaging sleeve assembly 16 before the subsequent activation of the nozzles 20C and 20D, so that all protruding ends 19 are applied and welded to each other in a flat manner. Obviously, in this case, it is not intended to perform welding between the wrapping film 17 and the coating of the overwrap sleeve 10 of the wrapping-sleeve assembly 16. Finally, it can be clearly seen in fig. 2 that the packaging sleeve assembly 16 in the region of its end sides surrounds the packaging sleeve assembly 16 at the corners and along its edges in a tight manner, so that an inherently stable and thus easy-to-transport solid unit is produced. In fig. 2 and 3 and in some of the following figures, a load carrier B is also shown, which is surrounded by a packaging film 17 in the same way as the packaging sleeve 10. For example, the load carrier B may be placed on the packaging sleeve 10 and thus arranged between the packaging sleeve 10 and the packaging film 17. The load carrier B is intended to contain an active substance (e.g. a biocide) and to introduce the active substance into the bale 14. For example, the load carrier B may be constructed as a flat plate. The load carrier B is only optional, and thus the bale 14 according to the application may or may not have a load carrier B.
Fig. 4 shows a blank 1 as known from the prior art, from which blank 1 a packaging sleeve can be formed. The blank 1 may comprise a plurality of layers of different materials, for example paper, cardboard, plastic material or metal, in particular aluminium. The blank 1 has a plurality of fold lines 2, which fold lines 2 are intended to facilitate folding of the blank 1 and divide the blank 1 into a plurality of faces. The blank 1 may be subdivided into a first side 3, a second side 4, a front 5, a back 6, a sealing surface 7, a bottom 8 and a gable surface 9. The blank 1 may be folded in such a way that the sealing surface 7 is connected, in particular welded, to the front surface 5, whereby a packaging sleeve is formed from the blank 1. Fig. 5 shows the packaging sleeve 10 in a flat folded state. The areas of the packaging sleeve 10 that have already been described with respect to fig. 4 are provided with corresponding reference numerals in fig. 5. The packaging sleeve 10 is formed from a blank 1 shown in fig. 5. For this purpose, the blank 1 is folded in such a way that the sealing surface 7 and the front surface are arranged to overlap, so that the two surfaces are welded to each other in a planar manner. Thus, a longitudinal seam 11 is created. In fig. 5, the packaging sleeve 10 is shown in a state folded together in a flat manner along two folded edges F. In this state, the side face 4 (hidden in fig. 5) is located below the front face 5, while the other first side face 3 is located on the rear face 6 (hidden in fig. 5). The front face 5 and the adjacent first side 3 thus form the front side 12 of the packaging sleeve 10, and the back face 6 and the adjacent second side 4 thus form the rear side 13 of the packaging sleeve. In the flat folded-together condition, a plurality of packaging sleeves 10 can be stacked in a particularly space-saving manner. Thus, packaging sleeves 10 are often stacked at a production location and transported in stacks to a filling location. The packaging sleeve 10 is only unstacked in the filling position and unfolded to enable filling of the content (e.g. food products). Filling may be performed under aseptic conditions. The food product may comprise at least one liquid ingredient.
It will be apparent to those skilled in the art that various modifications and variations can be made to the embodiments of the present application without departing from the spirit and scope of the application. Thus, it is intended that the present application also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.
Claims (7)
1. A packaging film is characterized in that the longitudinal tensile strength of the packaging film is more than or equal to 40MPa, the transverse tensile strength is more than or equal to 30MPa, the longitudinal elongation at break is more than or equal to 200%, the transverse elongation at break is more than or equal to 400%, the longitudinal shrinkage at 160 ℃ is 65% -90%, and the transverse shrinkage at 160 ℃ is 15% -35%.
2. The packaging film according to claim 1, wherein the thickness of the packaging film is 20-50 μm.
3. The packaging film according to claim 1, wherein the packaging film has a density of 0.905-0.935g/cm 2 。
4. A packaging film according to any one of claims 1-3, characterized in that the packaging film comprises, as main raw materials: LDPE, LLDPE, mPE.
5. A packaging film according to any one of claims 1 to 3, wherein the packaging film contains one or both of silver ions and zinc ions.
6. Use of a packaging film according to any one of claims 1-5 for transporting paper packaging material.
7. A bundle (14) comprising a packaging sleeve (10) and an outer package (15), the bundle (14) comprising:
-a plurality of packaging sleeves (10) made of composite material, and
-an outer package (15), said outer package (15) surrounding said packaging sleeve (10),
wherein each of said packaging sleeves (10) has a front side (12) and a rear side (13),
-wherein the front side (12) and the rear side (13) of each packaging sleeve (10) are separated from each other by a folded edge (F), along which folded edge (F) the packaging sleeve (10) is folded flat,
-wherein each said packaging sleeve (10) has two openings arranged on opposite sides of said packaging sleeve (10), and
wherein each said packaging sleeve (10) has a longitudinal seam (11), said longitudinal seams (11) connecting two edges of said composite material to form a circumferential packaging sleeve (10),
it is characterized in that the method comprises the steps of,
the outer package (15) is made of a packaging film (17), the longitudinal tensile strength of the packaging film (17) is more than or equal to 40MPa, the transverse tensile strength is more than or equal to 30MPa, the longitudinal elongation at break is more than or equal to 200%, the transverse elongation at break is more than or equal to 400%, the longitudinal shrinkage at 160 ℃ is 65% -90%, and the transverse shrinkage at 160 ℃ is 15% -35%.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210469627.6A CN117002863A (en) | 2022-04-28 | 2022-04-28 | Packaging film, use thereof and baled article |
| PCT/CN2022/123239 WO2023206970A1 (en) | 2022-04-28 | 2022-09-30 | Packaging structure, packaging method, packaging device, and storage medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210469627.6A CN117002863A (en) | 2022-04-28 | 2022-04-28 | Packaging film, use thereof and baled article |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117002863A true CN117002863A (en) | 2023-11-07 |
Family
ID=88517159
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210469627.6A Pending CN117002863A (en) | 2022-04-28 | 2022-04-28 | Packaging film, use thereof and baled article |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN117002863A (en) |
| WO (1) | WO2023206970A1 (en) |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102964576B (en) * | 2012-12-07 | 2015-04-01 | 富维薄膜（山东）有限公司 | Modified polyester and preparation method thereof |
| JP6436719B2 (en) * | 2014-10-28 | 2018-12-12 | 株式会社クレハ | Heat-shrinkable stretched multilayer film for skin pack, skin pack package using the same, and method for producing heat-shrinkable stretched multilayer film for skin pack |
| DE102017131262A1 (en) * | 2017-12-22 | 2019-07-11 | Sig Technology Ag | Container made of packing coats and an outer packaging |
| DE102019110620A1 (en) * | 2019-04-24 | 2020-10-29 | Sig Technology Ag | System for packing several containers on one plate |
| CN214638363U (en) * | 2021-03-31 | 2021-11-09 | 康美包（苏州）有限公司 | Sheet component detection system |
| CN216333514U (en) * | 2021-08-31 | 2022-04-19 | 康美包（苏州）有限公司 | Packaging structure |
-
2022
- 2022-04-28 CN CN202210469627.6A patent/CN117002863A/en active Pending
- 2022-09-30 WO PCT/CN2022/123239 patent/WO2023206970A1/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| WO2023206970A1 (en) | 2023-11-02 |
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