KR101763526B1 - Laminated film having a structure for reinforcing the adhesive strength of a sealing portion and a method of the same - Google Patents

Abstract

By drilling a plurality of display holes 15 so as to act as a working reference point of a subsequent process at a predetermined one of the non-print areas 17a, 17b, 18a and 18b on one surface of the synthetic resin film 12, The efficiency of the adhesive film 10 can be improved and the functional coating can be applied only to the necessary areas. This increases the economical efficiency. In the products such as the packaging pouch 20 manufactured using such a laminate film 10, And a method for producing the same. The display hole 15 is formed in the upper and lower non-printing areas 18a and 18b between the upper and lower edges of the synthetic resin film 12 and the printing areas 14a to 14d, And between the outside of the edge of the second printing area 14b and the outside of the edge of the third printing area 14c and the outside of the edge of the fourth printing area 14d. (D1) between the upper and lower non-printing areas 18a and 18b and the printing area 14a of the synthetic resin film 12 and the printing area 14b adjacent to the printing area 14a A non-printing area 17b corresponding to the vertical distance d2 between the non-printing area 17a and the printing area 14c adjacent to the printing area 14a in the vertical direction I do not.

Description

TECHNICAL FIELD [0001] The present invention relates to a laminated film having an adhesive strength reinforcing structure of a bonding portion and a method of manufacturing the laminated film.

The present invention relates to a laminated film and a method for producing the same, and more particularly, to a laminated film comprising a synthetic resin layer serving as a printing surface and a metal thin film layer such as aluminum, The present invention relates to a laminated film having a structure in which a bonding strength of a bonding portion can be relatively maintained when a packaging envelope such as a pouch is manufactured by coating the metal thin film layer with the exception of a bonding portion in coating a protective layer thereafter, .

Generally, the laminated film is a laminated film in which many nonwoven fabrics of synthetic resin such as polyvinyl, PVC, polystyrene (PS), ABS, AS resin, acrylic resin, polypropylene resin and polyethylene resin are laminated on two or more layers .

The laminating film can be divided into four types according to the laminating method of the film and the nonwoven fabric. The laminating film is a product made by bonding the film and the nonwoven fabric by using heat, and the hot melt laminating film Is a product made by using hot melt injection nozzle of film and nonwoven fabric. Solvent type hot melt laminating film is a product which is adhered to film nonwoven fabric by using roll coater. It is a product such as strip-laminated film It is widely applied to sanitary / medical films. Finally, glue-lined film is a product made by laminating films and non-wovens using glue glue.

For example, polyethylene (PE) based resins are widely used in household containers, electrical insulating parts, packaging films and envelopes, communication cables, agricultural films, and bottled containers. It is easy to process and inexpensive to use as a general food bag and shopping bag. Polypropylene (PP) has high strength, excellent resistance to chemicals and heat, and good transparency. It is mainly used in cosmetic containers, transparent films for packaging, various cases, and clothing packaging. The OPP film produced by stretching polypropylene uniaxially or biaxially has excellent moisture-proof property, is odorless and non-toxic, and hygienic, and is used for packaging and printing of various snacks, breads, and ramie noodles. PVC is widely used in everyday life such as hard film, soft agricultural film, packaging film, plastic bottle, zipper bag, decoration sheet and so on.

On the other hand, the laminated film is formed by depositing aluminum (Al) on one side of a synthetic resin film which functions as a base layer for use as a foodstuff for long-term shelf life or as a packaging material for electronic parts and medicines requiring high humidity resistance. Aluminum (Al) has a low transmittance of water vapor or oxygen, can completely block light, and is strong in heat resistance, cold resistance and durability, thereby strengthening the physical properties of the laminated film.

However, in the conventional process for producing a laminated film, an aluminum (Al) layer is deposited on the opposite side after packaging printing on one side of a synthetic resin film. In this case, Is caused. Such deformation accumulates in the process of lapping twice or three times depending on the use of the product, which causes errors in subsequent processing steps such as cutting and packaging. That is, in the case of a transparent sheet, one side is printed and the opposite side is printed. However, when opaque layers such as an aluminum layer are deposited, It is impossible to accurately print only an image, which causes inaccuracies in printing and a correction operation is required to solve the error.

In addition, the synthetic resin stream may generate a lot of dust due to the generation of static electricity as a whole, so that it is usual to print while removing dust at the time of a printing operation. In order to solve such a problem, an antistatic treatment is used or an antistatic agent is used. When an opaque aluminum layer is laminated, it is difficult to treat only the necessary portion even when applying antistatic treatment or antistatic agent after laminating. The same problem occurred in the post-treatment for imparting other functionality to the laminated film.

Korean Patent Laid-Open Publication No. 10-2011-0027409 (public date: March 16, 2011) Korean Registered Patent No. 10-1147128 (Registration date: May 10, 2012) Korean Registered Utility Model No. 20-0461465 (Registration date: July 9, 2012)

It is an object of the present invention to provide a laminated film comprising a synthetic resin layer and a metal thin film layer in a perforated manner at the boundary of a printed area of a synthetic resin layer, The present invention is intended to provide a laminated film having a structure in which the adhesive strength of a bonding portion can be maintained relatively strong when a packaging bag such as a pouch is manufactured and a method of manufacturing the same.

In order to solve the above-described technical problems,

1. A laminated film comprising a synthetic resin film to which a packaging printing is applied on one surface and an aluminum layer deposited on the other surface of the synthetic resin film,

Characterized in that a plurality of display holes are formed by perforating the synthetic resin film and the aluminum layer in a vertical direction at a predetermined position out of non-printing areas where no printing areas are formed on one surface of the synthetic resin film do.

When a coating for imparting functionality to the aluminum layer is applied with reference to the position of the display hole, only the regions corresponding to a certain distance are coated with respect to the display hole without coating the entire aluminum layer.

Further, according to the present invention,

As a method for producing a laminated film,

(S1) performing printing for packaging a product on one side of the synthetic resin film;

After the step (S1), a step S2 of forming an aluminum layer by laminating aluminum (Al) on a surface opposite to the synthetic resin film to a predetermined thickness;

(S3) forming a constant mark (Mak) between the printing areas on one side of the synthetic resin film to which the printing is applied after the synthetic resin film and the aluminum layer are finished to be laminated; And

 (S4) coating only the regions corresponding to a certain distance based on the markers without coating the entire aluminum layer in order to impart functionality to the aluminum layer with reference to the positions of the markings;

The present invention provides a method for producing a laminated film.

As described above, according to the present invention, in the process of manufacturing the laminate film, a plurality of display holes are formed in the synthetic resin film so as to serve as a working reference point of a subsequent process at a predetermined one of non- Thus, the work step of the laminate film in the normal manufacturing process is reduced, and the productivity is increased. Therefore, the efficiency of the operation is improved, and only the necessary areas are economical, such as application of the functional coating, and the adhesive strength of the bonding portion is relatively strengthened in a product such as a packaging pouch made using such a laminated film. In addition, the laminated film produced according to the present invention can be applied as packaging films for pharmaceuticals and food companies, and can be used as a ready-to-eat food for a single family member (semifinished food, dark extract, There is an implementation effect for packaging products for.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a view showing the structure of a laminated film produced according to a preferred embodiment of the present invention;
FIG. 2 is a sectional view along line AA of FIG. 1; FIG.
FIG. 3 is a view showing a packaging pouch structure fabricated using a laminated film manufactured according to a preferred embodiment of the present invention; FIG. And
4 is a view showing a manufacturing process of a laminated film according to a preferred embodiment of the present invention.

Hereinafter, a laminated film according to the present invention and a method for producing the same will be described in detail with reference to the accompanying drawings.

FIG. 1 and FIG. 2 show the structure of a laminated film produced according to a preferred embodiment of the present invention, and FIG. 4 shows a manufacturing process of the laminated film according to the present invention.

Referring to FIGS. 1, 2 and 4, a laminated film 10 manufactured according to a preferred embodiment of the present invention is made of polyvinyl, PVC, polystyrene (PS), ABS, AS resin, (= Step S1) is printed on one side of a synthetic resin film 12 made of a synthetic resin such as a resin, a polyethylene resin, or the like.

When printing of the synthetic resin film 12 is completed, aluminum (Al) is laminated on the opposite surface to a predetermined thickness to form the aluminum layer 13 (step S2). Aluminum (Al) has a low transmittance of water vapor or oxygen, can completely block light, and is strong in heat resistance, cold resistance and durability, thereby enhancing the physical properties of the laminated film.

When the synthetic resin film 12 and the aluminum layer 13 are finished, punching is performed to form a constant marking between the printing areas on one side of the synthetic resin film 12 to which the printing is applied (= Step S3). More specifically, the printing patterns 14a to 14d are formed by applying a printing pattern with a predetermined distance d1 and d2 on one side of the synthetic resin film 12, wherein the printing areas 14a to 14d are not formed And punching at a desired position out of the non-print areas to form the display hole 15. [ It will be easily understood by those skilled in the art that the printing areas formed on one side of the synthetic resin film 12 can be variously changed depending on the characteristics of the product to be packaged. It will be easily understood by those skilled in the art that the method for forming the mark can be variously changed.

Preferably, in the upper non-printing area 18a between the upper edges of the synthetic resin film 12 and the printing areas 14a and 14b, the outside of the edge of the first printing area 14a and the outside of the second printing area 14b And the display hole 15 is formed. Similarly, in the lower non-printing area 18b between the lower edges of the synthetic resin film 12 and the printing areas 14c and 14d, the outside of the edge of the third printing area 14c and the outside of the edge of the fourth printing area 14d And the position between the corner and the outside is punched to form the display hole 15. At this time, the display hole 15 should be formed at a position where it will not be disturbed by the additional printing process, the antistatic treatment, the application of the antistatic agent or the additional coating.

When the coating for applying the functionality to the aluminum layer 13 is applied with reference to the position of the display hole 15, the entire aluminum layer 13 is not coated, It becomes possible to apply a partial coating that covers only the regions. The upper and lower non-printing areas 18a and 18b between the upper and lower edges of the synthetic resin film 12 and the printing areas 14a to 14d and the printing areas 14a A non-printing area 17a corresponding to a horizontal distance d1 between a printing area 14b adjacent to the printing area 14a and a printing area 14b adjacent to the printing area 14b adjacent to the printing area 14b, The functional coating is not applied to the non-printing area 17b corresponding to the vertical distance d2. Accordingly, the functional coating layer 16 is formed on the corresponding regions of the aluminum layer 13 corresponding to the printing regions 14a to 14d of the synthetic resin film 12 (step S4).

FIG. 3 is a view showing a packaging pouch structure fabricated using a laminated film produced according to a preferred embodiment of the present invention.

3, the packaging pouch 20 manufactured using the laminated film 10 manufactured according to the present invention includes an opening 21 opened to allow contents to be inserted therein, A bonding portion 22 formed by melting and bonding the front and back surfaces of the synthetic resin film 12 and a bottom portion 23 formed so as to support the contents by spreading the lower portion of the pouch 20. [

The packaging pouch 20 has a ratio d1 corresponding to the horizontal distance d1 between the printing area 14a of the synthetic resin film 12 and the printing area 14b adjacent to the printing area 14a of the synthetic resin film 12 in Fig. A non-printing area 17b corresponding to the vertical distance d2 between the printing area 14a and the printing area 14c adjacent to the printing area 14a in the vertical direction, And the corresponding areas of the aluminum layer 13 corresponding to the upper and lower non-printing areas 18a, 18b between the lower edges and the printing areas 14a-14d, The adhesive layer 22 is formed to have a relatively strong adhesive force because the functional coating layer 16 is not formed unlike the conventional coating method.

As will be readily appreciated by those skilled in the art, the punching operation for forming markings, such as the above-mentioned holes, can be accomplished by a printing process , Antistatic treatment, application of an antistatic agent, and application of a functional coating.

 Therefore, the efficiency of the operation is improved, and only the necessary areas are economical, such as application of the functional coating, and the adhesive strength of the bonding portion is relatively strengthened in a product such as a packaging pouch made using such a laminated film. In addition, the laminated film produced according to the present invention can be applied as packaging films for pharmaceuticals and food companies, and can be used as a ready-to-eat food for a single family member (semifinished food, dark extract, There is an implementation effect for packaging products for.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the present invention as defined by the following claims. It can be understood that it is possible.

10: laminated film 12: synthetic resin film
13: Aluminum layer 14a to 14d: Print area
15: Indication hole 16: Functional coating layer
17a, 17b, 18a, 18b: a non-printing area 20: a packaging pouch
22:

Claims (7)

A composite film (10) comprising a synthetic resin film (12) to which packaging printing is applied on one side and an aluminum layer (13) deposited on the other side of the synthetic resin film (12)
The synthetic resin film 12 and the aluminum layer 13 are perforated in a predetermined position among the non-printing areas where the printing areas 14a to 14d are not formed on one side of the synthetic resin film 12 Wherein a plurality of display holes (15) are formed. The display device according to claim 1, wherein the indication hole (15) is formed in the upper and lower non-printing areas (18a, 18b) between the upper and lower edges of the synthetic resin film (12) and the printing areas Formed between the outside of the edge of the first printing area 14a and the outside of the edge of the second printing area 14b and between the outside edge of the third printing area 14c and the outside of the edge of the fourth printing area 14d ≪ / RTI > The display device according to claim 2, wherein when the coating for imparting functionality to the aluminum layer (13) is applied with reference to the position of the display hole (15), the display hole (15) Is coated with only regions corresponding to a certain distance on the basis of a predetermined distance. The method of claim 3, wherein the upper and lower non-printing regions (18a, 18b) between the upper and lower edges of the synthetic resin film (12) and the printing regions (14a- A non-printing area 17a corresponding to a horizontal distance d1 between the printing area 14a and the printing area 14b which is adjacent to the printing area 14a in the lateral direction of the printing area 14a, Characterized in that no functional coating is applied to the non-printing area (17b) corresponding to the vertical distance (d2) between adjacent printing areas (14c). As a method for producing a laminated film,
(S1) of performing printing for product packaging on one side of the synthetic resin film 12;
(S2) stacking aluminum (Al) on the opposite side of the synthetic resin film (12) to a predetermined thickness to form an aluminum layer (13) after the step (S1);
A step of forming a constant mark between the printing regions 14a to 14d on one side of the synthetic resin film 12 to which the printing is applied after the synthetic resin film 12 and the aluminum layer 13 are finished, (S3); And
(S4) coating only the regions corresponding to a certain distance based on the marking without coating the entire aluminum layer (13) in order to impart functionality to the aluminum layer (13) with reference to the position of the marking;
≪ / RTI > The display device according to claim 5, wherein, in step (S3), the marking is a display hole (15) formed by punching, and the display hole (15) In the upper and lower non-printing areas 18a and 18b between the printing areas 14a to 14d, between the outside of the corners of the first printing area 14a and the outside of the corners of the second printing area 14b, Is formed at a position between the outside of the edge of the area (14c) and the outside of the edge of the fourth printing area (14d). The method of claim 5, wherein in step (S4), the upper and lower non-printing areas (18a, 18b) between the upper and lower edges of the synthetic resin film (12) and the printing areas A non-printing area 17a corresponding to a horizontal distance d1 between the printing area 14a of the synthetic resin film 12 and the printing area 14b adjacent to the printing area 14a, Characterized in that the functional coating is not applied to the non-printing area (17b) corresponding to the vertical distance (d2) between the printing area (14c) and the printing area (14c) adjacent thereto in the vertical direction.

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