Packaging wrap

Abstract

To provide a packaging wrap capable of reducing the thickness of the packaging wrap, reducing the manufacturing cost, improving the protective performance of an adhesive part, and improving the adhesive performance of the packaging wrap.SOLUTION: A packaging wrap according to the invention comprises: a lap sheet 10 in which a plurality of convex portions 12 are formed and a valley portion 14 is formed between the convex portions; an adhesive portion 20 which is laminated on the inner surface of the convex portion of the wrap sheet and adheres or bonds to the surface of an article when the wrap sheet is used to maintain the sealing property of the wrap sheet; and a protective sheet 30 which is laminated on the trough of the lap sheet, closes the open lower surface of the convex portion, supports the convex portion so as to maintain its shape, and releases the lower surface of the convex portion while detaching when the lap sheet is pulled with a force set in the side direction or when the lap sheet is pressed.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to a wrapping film that seals materials such as food products or containers in which the materials are stored, blocks the penetration of foreign substances, moisture, and air, and protects the materials, and is provided with an adhesive portion to improve the sealing performance.

Background Art

[0002] Generally, foods are likely to deteriorate due to the growth of harmful microbial groups (microflora) caused by contact with harmful bacteria, spoilage bacteria, etc. during the production, processing, and distribution processes. Therefore, a wrapping film is used to seal and store the foods so as to prevent this and maintain freshness.

[0003] Currently, one of the commonly used wrap materials includes a polymeric composition material formed of a thin compliant web or sheet material supplied in a rolled form. As an example of such a wrap material, materials such as polyvinyl chloride (PVC), polyvinylidene chloride (PVDC), and polyethylene (PE) can be used. Such a wrap material exhibits a clinging character on at least one surface in addition to the characteristics of the polymeric materials forming these materials and the characteristics of additives such as plasticizers and tackifiers, adheres to an article, and the article is sealed.

[0004] The adhesion of such a wrap material will act as an important factor in maintaining the freshness of food, but in order to protect food from oxygen, moisture / water vapor, odor, or bacterial penetration, the sealing performance must be continuously maintained.

[0005] As disclosed in Korean Patent Publication No. 10-2004-0045917 (June 2, 2004), the existing storage wrap material forms a plurality of protrusions and recesses on the wrap material, and coats the protrusions or recesses with an adhesive composition so that it can be adhered to the surface of an article to be sealed by the adhesive composition, thereby continuously maintaining the sealing performance.

[0006] However, such a conventional wrap material must maintain its form so as to protect the adhesive composition before the protrusions and recesses adhere to the surface of the article, that is, when stored in a rolled state. In this case, the thickness must be made sufficiently thick to have the strength to maintain the form of the protrusions and recesses, and the wrap material must also use a material that can maintain its strength, so there is a problem that the product price becomes high.

[0007] Also, when using the wrap material, in order for the adhesive composition to adhere to the surface of the article, the wrap material must be pushed or pulled with sufficient force so that the protrusions and recesses spread, so there is a problem that it is inconvenient to use.

Prior Art Documents

Patent Documents

[0008]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0009] Therefore, an object of the present invention is to provide a packaging wrap that can reduce the manufacturing cost by providing a protective sheet on the open lower surface of the convex portion to support the convex portion in order to maintain the form of the convex portion of the wrap sheet, so that the thickness of the wrap sheet portion can be manufactured thinly, and the material of the wrap sheet portion can also be used as a general-purpose, general wrap material.

[0010] Another object of the present invention is to provide a packaging wrap that can improve the convenience of use by manufacturing the protective sheet from a porous sheet so that the protective sheet can be sufficiently torn even when using less pulling or pressing force of the wrap sheet when using the wrap sheet.

Means for Solving the Problems

[0011] To achieve the above object, the packaging wrap of the present invention includes a wrap sheet in which a plurality of convex portions are formed and a valley portion is formed between the convex portions; an adhesive portion laminated on the inner surface of the convex portion of the wrap sheet and adhered or bonded to the surface of an article when using the wrap sheet to maintain the airtightness of the wrap sheet; and a protective sheet laminated on the valley portion of the wrap sheet, closing the open lower surface of the convex portion, supporting the convex portion so as to maintain its shape, and opening the lower surface of the convex portion while detaching when the wrap sheet is pulled with a laterally set force or the wrap sheet is pushed.

[0012] The convex portion includes a side surface portion protruding in the upper side direction and an upper surface portion formed on the upper stage of the side surface portion and closing the upper surface. The side surface portion is formed in a circular, elliptical or polygonal form, and the upper surface portion can be formed in a planar shape so that the adhesive portion is laminated in a flat plate shape.

[0013] The protective sheet can be formed to be thinner in thickness than the wrap sheet.

[0014] The protective sheet can include a laminated portion adhering to the valley portion of the wrap sheet and a sealing portion closing the open lower surface of the convex portion.

[0015] The protective sheet can have a material and thickness that can be detached when a pulling force in the lateral direction or a force in the direction of pushing the wrap sheet acts when attaching the wrap sheet to an article.

[0016] The protective sheet can form a large number of holes so that the detachment action can be easily performed.

Advantages of the Invention

[0017] As described above, the wrapping film of the present invention can support the convex portion by attaching a protective sheet to the open lower surface of the convex portion of the film sheet so as to maintain the form of the convex portion, thereby enabling the film sheet portion to be manufactured with a reduced thickness. Since the material of the film sheet portion can also be used as a general-purpose wrapping material, the manufacturing cost can be reduced.

[0018] In addition, the protective sheet closes the open lower surface of the convex portion, protecting the adhesive portion laminated on the inner surface of the convex portion, and improving the performance of the wrapping film.

[0019] In addition, the protective sheet is made of a porous sheet having a plurality of holes. When the film sheet is used, the protective sheet can be sufficiently detached even when the pulling or pushing force of the film sheet is used less, improving the convenience of use.

Brief Description of the Drawings

[0020]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Modes for Carrying Out the Invention

[0021] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. In this process, the sizes, shapes, etc. of the components shown in the drawings may be exaggerated for clarity and convenience of explanation. Also, terms specifically defined in consideration of the configuration and operation of the present invention may vary depending on the intention or convention of the user or operator. Definitions of such terms must be given based on the content throughout this specification.

[0022] FIG. 1 is a perspective view of a wrapping film according to a first embodiment of the present invention wound around a roll member, and FIG. 2 is a cross-sectional view of the wrapping film according to the first embodiment of the present invention.

[0023] The wrapping film 100 according to the first embodiment is stored in a state of being wound around a roll member 110, and includes a wrap sheet 10 in which a plurality of convex portions 12 are formed regularly or irregularly, and a valley portion 14 is formed between the convex portions; an adhesive portion 20 laminated on the inner surface of the convex portion 12 of the wrap sheet 10; and a protective sheet 30 laminated on the valley portion 14 of the wrap sheet 10, closing the open lower surface of the convex portion 12 and supporting the convex portion 12 so as to maintain its form, and releasing the convex portion 12 while detaching when a certain force is applied laterally.

[0024] The wrap sheet 10 is any thin permeable or impermeable substrate used for wrapping perishable products, and can include, but is not limited to, paper, polymer or plastic film, cloth or fabric, woven fabric, non-woven fabric, laminate, metal foil such as aluminum foil, coated paper such as wax paper or greaseproof paper, and any material including combinations thereof.

[0025] In addition, the characteristics of the wrap sheet 10 can include, but are not limited to, combinations or grades of porosity, non-porosity, microporosity, gas or liquid permeability, impermeability, hydrophilicity, hydrophobicity, hygroscopicity, lipophilicity, oleophobicity, high critical surface tension, low critical surface tension, surface pre-texturing, elastic yield, firing yield, electrical conductivity, and electrical non-conductivity.

[0026] Polymer films suitable for the material of the wrap sheet 10 can include, but are not limited to, polyethylene, ethylene copolymers such as ethylene vinyl acetate (EVA), polypropylene, polyethylene terephthalate (PET), polyvinyl chloride (PVC), polyvinylidene chloride and copolymers (PVDC), latex structures, polystyrene, nylon, etc. Polyolefins are generally preferred due to their low cost and ease of molding.

[0027] The thickness of the wrap sheet 10 is 0.005 mm to 0.051 mm. A more preferred thickness is 0.0076 mm to 0.025 mm. Since the thickness of such a wrap sheet 10 is supported by the protective sheet 30, it can be formed to be sufficiently thinner than the thickness of existing wrap materials.

[0028] The wrap sheet 10 includes a plurality of convex portions 12 protruding upward and a large number of valley portions 14 formed between these convex portions. The convex portions 12 may be formed so that their shapes and sizes are different from each other, or may be formed with the same size and the same shape.

[0029] As shown in Fig. 3, the convex portions 12 are arranged in the horizontal and vertical directions. The first row portion (A), the second row portion (B), and the third row portion (C) arranged in the horizontal direction are arranged in a zigzag shape in the vertical direction. That is, the convex portions of the first row portion (A) are arranged between the convex portions of the second row portion (B), the convex portions of the third row portion (C) are arranged between the convex portions of the second row portion (B), and overall they are arranged in a zigzag shape. In this way, when a plurality of convex portions 12 are arranged in a zigzag shape, when the adhesive portions of the convex portions adhere to the surface of the article, the sealing performance can be improved by adhering to each other in a zigzag shape.

[0030] The sizes and shapes of the convex portions 12 can be made different from each other, or they can be manufactured in the same size and form.

[0031] The convex portion 12 is composed of a side surface portion 42 that protrudes so as to bulge and an upper surface portion 44. The side surface portion 42 can be manufactured in various shapes such as circular, polygonal, and elliptical. Since the adhesive portion 20 is laminated on the inner surface of the upper surface portion 44, it is preferably formed in a planar shape. The wrap sheet 10 can be formed of a material that can stretch within a set range when pulled in the lateral direction (left - right direction in Fig. 2).

[0032] The adhesive portion 20 can include all generally considered materials used for adhering to the surface of the article. Examples of the adhesive material (adhesive) forming the adhesive portion 20 can include, but are not limited to, glue, solvent - based adhesives, emulsions, and high - temperature melt vacuum adhesives.

[0033] Such an adhesive portion 20 is a material that can maintain its adhesive performance at normal temperature, and a material whose adhesive performance does not deteriorate when in contact with air can be used.

[0034] Methods for forming the adhesive portion 20 on the wrap sheet 10 can include roller coating, spraying, coating, printing, transfer, extrusion, brushing, padding, or combinations thereof.

[0035] The adhesive part 20 can be applied to the wrap sheet at a level of about 0.1 gsm to about 50 gsm, preferably about 0.5 gsm to about 20 gsm, more preferably about 1 gsm to about 10 gsm, and even more preferably about 1 gsm to about 5 gsm per square meter.

[0036] The adhesive part 20 can be formed of a material that adheres to the product surface, that is, can be attached and peeled off, or can also be formed of a material that adheres, that is, does not fall off once attached.

[0037] The protective sheet 30 can be attached to the trough portion of the wrap sheet 10 by various methods such as coating, laminated extrusion, and fusion, and includes a laminated portion 34 laminated on the trough portion 14 and a sealing portion 32 that closes the open lower surface of the convex portion 12.

[0038] Such a protective sheet 30 is formed to be relatively thinner than the wrap sheet 10. In order to attach the wrap sheet 10 to the article surface, for example, when the wrap sheet 10 is pulled left and right (laterally), the side surface portion 42 of the convex portion 12 spreads left and right, the convex portion 12 collapses, and the convex portion 12 cannot maintain its shape. At this time, the sealing portion 32 peels off and the lower surface of the convex portion 12 is opened.

[0039] The thickness and material of the protective sheet 30 are determined so that it can be ruptured and detached by the force of pulling the wrap sheet 10 left and right for use, and it must have a strength that can withstand rupture when it is in a state of being wound around a roll member (when not in use).

[0040] That is, the protective sheet 30 has a strength that can sufficiently support the convex portion 12 so as to maintain the shape of the convex portion 12 when the wrap sheet 10 is wound around the roll member, and when in use, that is, when attaching the wrap sheet 10 to the surface of an article, it must have a strength that can rupture and detach while opening the lower surface of the convex portion 12 when the wrap sheet 10 is pulled laterally.

[0041] The existing wrap material must ensure sufficient thickness for maintaining the form of the convex portion, and the material must also be selected considering such matters. That is, since the adhesive portion 20 is laminated on the inner surface of the convex portion 12, the wrap sheet 10 is wound around the roll member while maintaining the state where the adhesive portion 20 is laminated on the inner surface of the convex portion 12 as it is, and when adhering to the surface of an article, the wrap sheet 10 is pulled or the convex portion 12 is pushed so that adhesion is performed.

[0042] Therefore, in order for the convex portion of the wrap material to maintain its form, a thickness corresponding thereto is required, and a material suitable for this must be used, so there is a problem that the cost of the wrap material increases.

[0043] The wrap for packaging according to the present invention has the protective sheet 30 supporting the open lower surface of the convex portion 12 of the wrap sheet 10 so that the convex portion 12 can maintain its form, so the thickness of the wrap sheet 10 can be further reduced, and the material can also use a general-purpose material, and the manufacturing cost can be significantly reduced.

[0044] Looking at the usage state of the wrap material configured in this way, as shown in FIG. 4, when the wrap for packaging adheres to the surface of an article, when a force (P) pulling the wrap sheet 10 in the lateral direction or a force (Q) pushing from the upper side to the lower side acts, the side surface portion 42 of the convex portion 12 spreads in both lateral directions, and the sealing portion 32 of the protective sheet 30 ruptures and detaches by this force while the lower surface of the convex portion 12 is opened, and the adhesive portion 20 laminated on the convex portion 12 comes into contact with the surface of the article to seal the article.

[0045] FIG. 5 is a cross-sectional view of the wrap for packaging according to the second embodiment of the present invention.

[0046] The wrap for packaging according to the second embodiment of the present invention is the same as the wrap for packaging described in the first embodiment, and is different in that it is formed of a porous sheet in which a plurality of holes 70 are formed in the protective sheet 30.

[0047] By forming a large number of holes 70 in the protective sheet 30, there is an advantage that the protective sheet 30 can be easily detached. At this time, the shape of the holes 70 may be a dotted line shape, or may be a circular, polygonal or elliptical hole shape. In the protective sheet 30, dotted line-shaped holes in a straight line in a direction perpendicular to the left-right direction of the wrap sheet can be formed at regular intervals.

[0048] Thus, a large number of holes 70 are formed in the protective sheet 30 according to the second embodiment, and when the wrap sheet 10 is pulled or pushed laterally, it can be more easily detached by the acting force, and the protruding portion can be easily opened.

[0049] As described above, the present invention has been described in detail by taking specific preferred embodiments as examples. However, the present invention is not limited to the above content, and various changes and modifications can be made by those having ordinary knowledge in the technical field to which the present invention belongs without departing from the scope of the present invention.

Claims

1. A packaging wrap for attachment to a surface of an article, comprising: A wrap sheet having a plurality of protrusions formed thereon and having valleys formed between the protrusions; an adhesive portion that is laminated on the inner surface of the protruding portion of the wrap sheet and that adheres or bonds to the surface of an article when the wrap sheet is used to maintain the sealing property of the wrap sheet; A protective sheet laminated in close contact with the valley portion of the wrap sheet, The protective sheet is laminated in close contact with the valley portions of the wrap sheet when wound around a roll member, covers the open undersides of the protrusions, and supports the protrusions so that they maintain their shape. When the wrap sheet is pulled laterally to attach the wrap sheet to the surface of an article, the protective sheet has the strength to burst and detach, thereby opening the undersides of the protrusions, and is thinner than the wrap sheet.

2. The protrusion includes a side portion protruding in an upward direction and an upper surface portion formed on an upper stage of the side portion and closing an upper surface, The wrapping wrap according to claim 1 , wherein the side portions are formed in a circular, elliptical or polygonal shape, and the top portion is formed in a planar shape so that the adhesive portion is laminated in a flat plate shape.

3. 2. The packaging wrap according to claim 1, wherein the convex portions are arranged in a first row (A), a second row (B), and a third row (C) in the horizontal and vertical directions, the convex portions in the first row (A) are arranged between the convex portions in the second row (B), and the convex portions in the third row (C) are arranged between the convex portions in the second row (B), and are arranged in a zigzag shape overall.

4. The wrapping wrap according to claim 1 , wherein the adhesive portion is applied to the inner surface of the protrusion and is made of a material that can be peeled off after being attached to the surface of an article.

5. The packaging wrap according to claim 1 , wherein the protective sheet includes a lamination portion attached to the valley portion of the wrap sheet and a sealing portion closing the open lower surface of the protrusion portion.

6. 2. The packaging wrap according to claim 1, wherein the protective sheet is formed with a number of holes to facilitate removal.

7. 2. The wrapping wrap according to claim 1, wherein the protective sheet has straight dotted holes formed at regular intervals in a direction perpendicular to the left-right direction of the wrap sheet.

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