JP2007045514A - Food package and its manufacturing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a food package which has a simple structure and can be manufactured easily even if an opening mouth to open is formed on the food package. <P>SOLUTION: The food package 1 comprises a food packing part 4 surrounded by two packaging materials 2 and 3, an adhesive sealing part 5 in which two packaging materials 2, 3 are bonded to each other releasably by surrounding the food packing part 4 and the opening mouth 6 in which two packaging materials 2, 3 are not bonded at the outer edge of the adhesive sealing part 5 and which is a pulling part for releasing the adhesive sealing part 5. The maximum length L from the boundary 8 of the opening mouth 6 and the adhesive sealing part 5 to the outer edge of the opening mouth 6 is 6 mm or more and 40 mm or less and the surface of at least one of the packaging materials 2, 3 at the opening mouth 6 is embossed. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a food package and a method for manufacturing the same, and more particularly to a food package having a structure that can be easily opened and a method for manufacturing the same.

  Many foods sold at retail stores, supermarkets, etc., are pre-packaged and displayed in retail unit sachets at food manufacturing plants in order to save sanitary control at the distribution stage or weighing and packaging at the retail stage. Sold. In this sachet form, since the periphery of the food wrapping part containing the food is surrounded by the adhesive sealing part, it is necessary to peel the adhesive sealing part with a finger and take out the food inside. In order to facilitate the opening operation at the time of taking out such food, when the two packaging materials are joined by heat fusion and the food is packaged, an opening opening portion is formed on the adhesive sealing portion around the food enclosing portion. Is formed, and the adhesive seal portion can be peeled by pulling the opening portion.

As a conventional structure of such a food packaging body, one in which rib-shaped irregularities are provided on one packaging material in two packaging materials that wrap food is known. The rib-shaped unevenness is formed at one corner of one packaging material, and a stepped portion having a stepped shape is formed at the corner of the other packaging material corresponding to the rib-shaped unevenness. ing. In this way, when the two packaging materials are welded, the rib-shaped unevenness is hardly thermally fused to the stepped portion, so that the rib-shaped unevenness forming portion can be used as the opening opening portion. Therefore, it is possible to perform a pulling operation using the opening as a clue, and it is possible to easily open the package (for example, see Patent Document 1).
JP 2000-203639 A

  However, in the conventional food packaging body, since it is necessary to form a step part in the other packaging material corresponding to the rib-shaped unevenness of one packaging material, the structure is complicated. In addition, since it is necessary to form rib-shaped irregularities and step portions on each of the two packaging materials, the manufacture of the package is troublesome, and individual molds are required to produce each packaging material. Thus, since many molds are required, there is a problem that the manufacturing cost increases.

  The present invention has been made in consideration of such problems, and even if an opening for opening is formed, the structure is simple and can be easily manufactured. An object of the present invention is to provide a food packaging body capable of reducing the number and a manufacturing method thereof.

  In order to achieve the above object, the food packaging body of the present invention has a food wrapping portion surrounded by two wrapping materials, and the two wrapping materials bonded to each other so as to be peeled from each other. A food packaging body comprising an adhesive sealing portion and an opening portion serving as a pulling portion for peeling the adhesive sealing portion, in which two packaging materials are in a non-adhering state at an outer edge portion of the adhesive sealing portion The maximum length from the boundary between the opening portion and the adhesive sealing portion to the outer edge of the opening portion is 6 mm or more and 40 mm or less, and at least one surface of the two packaging materials in the opening portion is embossed It is characterized by being.

  In the above invention, the two wrapping materials are composed of a first wrapping material made of a thermoplastic resin film and a second wrapping material made of a thermoplastic resin plate or film, and the embossing is performed on one side of at least one film. Or you may form so that it may have a some convex part on both surfaces. The food wrapping portion may have a concave shape formed by deep drawing the second wrapping material. Furthermore, the boundary between the opening portion and the adhesive sealing portion may be formed in a shape having a portion protruding toward the opening portion, and the convex portion is distributed over substantially the entire area of the opening portion. Also good.

  The method for producing a food package according to the present invention includes a food wrapping portion surrounded by two wrapping materials, an adhesive sealing portion surrounding the food wrapping portion and two wrapping materials bonded to each other so as to be peeled from each other. In the method for producing a food packaging body, the two wrapping materials are in a non-adhered state at the outer edge portion of the adhesive sealing portion, and the opening portion is a pulling portion for peeling the adhesive sealing portion. And forming the maximum length from the boundary between the opening and the adhesive seal to the outer edge of the opening to be 6 mm or more and 40 mm or less, and at least one surface of the two packaging materials in the opening It is characterized by embossing.

  In this case, as the two wrapping materials, a first wrapping material made of a thermoplastic resin film and a second wrapping material made of a thermoplastic resin plate or film are used. You may emboss so that it may have a part.

  Also, the food wrapping portion is formed by deep drawing the second wrapping material to form a food wrapping portion in a concave shape, embossing the opening portion of the first wrapping material and / or the second wrapping material. After the food is stored, the two packaging materials are overlapped, and in this overlapped state, the portions other than the food wrapping portion and the opening portion are heat-sealed to form an adhesive seal portion. good. Further, a thermoplastic resin film may be used as the second wrapping material, and the deep drawing and embossing may be performed on the film in the same process, and the boundary between the opening and the adhesive sealing portion is the opening. You may form an adhesion sealing part so that it may have a part projected on the part side.

  According to the present invention, the maximum length from the boundary between the opening portion and the adhesive sealing portion to the outer edge of the opening portion is set to 6 mm or more and 40 mm or less, so that the opening portion can be easily sandwiched between fingers. Moreover, since at least one surface of the two packaging materials in the opening part is embossed, it does not slip when the opening part is picked with a finger. Therefore, the opening portion can be reliably pulled by these, and the opening operation can be easily performed.

  According to the present invention, it is only necessary to set the dimensions of the opening and emboss the opening, and the structure for opening can be simplified. In addition, it is easy to manufacture because it only embosses the packaging material, and it is not necessary to manufacture the two packaging materials with individual molds, so the number of molds can be reduced. It is possible to provide the food packaging body at a low cost.

  The food wrapping body of the present invention is formed by two wrapping materials, and the food wrapping portion surrounded by the two wrapping materials and the two wrapping materials can be separated from each other surrounding the food wrapping portion. Two sealing materials are in a non-adhered state at the outer edge portion of the adhesive sealing portion, and there is an opening opening portion that becomes a tensile portion for peeling the adhesive sealing portion. is doing.

  The two packaging materials are not particularly limited, and any packaging material of any material and structure can be used as long as the packaging material can package food in a sanitary manner. In this embodiment, both of the two packaging materials are made of a material containing a thermoplastic resin (thickness 0.254 mm, also referred to as a sheet), because it may be easy to perform thermal bonding (thermal fusion) or embossing. It is preferable to use a board. Examples of the thermoplastic resin include polyolefins such as polyethylene and polypropylene, polyamides such as nylon, vinyl acetate resin, polyvinyl alcohol, polyvinyl acetal, polystyrene, polyester, methacrylic resin, ABS resin, AS resin, polyphenylene ether, polyphenylene sulfide, and others. The resin can be selected. As the two packaging materials, a laminate of a plurality of materials containing such a thermoplastic resin, a resin material on which aluminum, alumina, silica or the like is vapor-deposited can be suitably used. Moreover, the structure which laminated | coated the resin or resin which contains such a thermoplastic resin on the core material surfaces, such as a paper sheet and aluminum foil, may be sufficient.

  FIG.1 and FIG.2 shows the food packaging body 1 in this embodiment, respectively. These food packaging bodies 1 are formed by the two packaging materials 2 and 3 made of the above-described materials, and are food packaging that accommodates food (not shown) by being surrounded by the two packaging materials 2 and 3. It is provided with an embedding part 4, an adhesive sealing part 5 surrounding the food enclosing part 4, and an opening 6 for peeling the adhesive sealing part 5.

  In the food packaging body 1 shown in FIG. 1, one packaging material (first packaging material) 2 is a film, and the other packaging material (second packaging material) 3 is a plate or a film. And the concave food packaging part 4 is formed by performing deep drawing molding with respect to the 2nd packaging material 3. FIG. The first wrapping material 2 is formed into a film having an area covering the entire food wrapping portion 4 of the second wrapping material 3, and the food wrapping portion 4 is brought into contact with the second wrapping material 3. To be sealed.

  In the food packaging body 1 shown in FIG. 2, two packaging materials (first packaging material 2 and second packaging material 3) are films, and these drawing materials 2 and 3 are deep-drawn. Thereby, the concave-shaped portions 2a and 3a are formed. And the food enveloping part 4 is formed by abutting this concave-shaped part 2a, 3a. In the food packaging body 1 of FIG. 2, since the deep packaging is performed on the two packaging materials 2 and 3, the manufacturing process is somewhat complicated as compared with the food packaging body 1 of FIG. In the food packaging body 1, since the two packaging materials 2 and 3 have a line-symmetric shape, there is a merit that only one mold may be used as a mold for deep drawing.

  1 and 2, the periphery of the food wrapping portion 4 is surrounded by the adhesive sealing portion 5. The adhesive sealing portion 5 is a state in which the outer wrapping portion of the food wrapping portion 4 is heat-sealed to bond the two wrapping materials 2 and 3 together. By providing the adhesive sealing part 5, the food wrapping part 4 can be sealed, and the food wrapping part 4 is shielded from the outside world, so that oxidation, perfume and other deterioration of the internal food are prevented. Can do. In this case, the inside of the food wrapping part 4 can be evacuated or replaced with an inert gas, or an oxygen absorbent can be placed inside the food wrapping part 4, thereby further deteriorating the food. It can be surely prevented. Such an adhesive sealing part 5 adheres the two packaging materials 2 and 3 in a state where they can be peeled from each other. As the bonding means, various adhesives including hot melt glue, ultrasonic bonding, and other means other than heat fusion can be used as appropriate.

  The opening part 6 is provided in the outer edge part of the adhesion sealing part 5, and has made the two packaging materials 2 and 3 into a non-adhesion state. That is, the opening part 6 makes two packaging materials non-adhesive on the outside of the adhesive sealing part 5. Therefore, by picking and holding the opening portion 6 with a finger and pulling the opening portion 6 in the peeling direction, the packaging material is pulled in the same direction, so that the adhesive sealing portion 5 can be peeled off. Thereby, the foodstuff inside the food packaging part 4 can be taken out easily.

  Although the opening part 6 may be provided in the whole periphery of the outer edge part of the adhesion sealing part 5, it is preferable from the point of the external appearance and the handleability of the food packaging body 1 to provide in a part of outer edge part. 3-5 shows embodiment which provided the opening part 6 in a part of outer edge part in the adhesion sealing part 5. FIG. In FIG. 3, the entire food packaging body 1 is formed in a planar rectangular shape, and the opening 6 is provided at one corner of the four corners. In FIG. 4, the whole food packaging body 1 is formed in a substantially oval shape when viewed from above, and the opening 6 is provided at one end of the long axis. In FIG. 5, similarly to FIG. 3, the opening 6 is provided at one corner of the rectangular shape, but the shape of the opening 6 is different from that in FIG. 3.

  Hereinafter, the opening part 6 will be further described. As shown in FIG. 3, the opening 6 may be provided with a straight boundary portion 8 with the adhesive sealing portion 5, or may be provided with a curved line or other special shape. When the boundary part 8 with the adhesive sealing part 5 is made straight, the opening part 6 can be easily formed.

  On the other hand, the opening part 6 shown in FIG.4 and FIG.5 has the part which protrudes in the opening part 6 side in the boundary part 8 with the adhesion sealing part 5, and code | symbols 8a and 8b are this protrusion part. Indicates. Thus, when forming the protrusion parts 8a and 8b in the opening part 6, the peeling force in the beginning (at the start of peeling) of the pulling operation for peeling the two packaging materials 2 and 3 can be reduced. . Further, even when the adhesive force of the adhesive sealing portion 5 that bonds the two packaging materials 2 and 3 is increased, the two packaging materials 2 and 3 can be easily opened.

  In the opening part 6 shown in FIG. 5, the corrugated protrusion 8b is formed at the boundary part 8 with the adhesive sealing part 5, so that the opening part 6 has a substantially heart shape. In such a shape, it becomes easier to pick the opening 6 from both sides in the thickness direction of the packaging material with the belly of two fingers, and even if it is pulled toward any part of the adhesive seal 5 It becomes possible to start peeling.

  The boundary portion 8 between the opening 6 and the adhesive sealing portion 5 is not limited to the above embodiment, and the boundary portion may be formed by a curve. By setting it as such a curve, the tension | tensile_strength required at the time of peeling of the packaging materials 2 and 3 can be adjusted. Moreover, by making it into a curve, it is possible to lengthen the maximum length (this will be described later) from the boundary portion 8 with the adhesive sealing portion 5 to the outer edge of the opening 6, and the two fingers It becomes easier to pick the opening 6 from both sides in the thickness direction of the packaging material by the stomach.

  In the present invention, the size of the opening 6 is set by the maximum length from the boundary portion 8 to the adhesive sealing portion 5 to the outer edge thereof, which will be described with reference to the embodiments shown in FIGS. To do.

  6-9, the opening part 6 is provided in the corner part of the food packaging body 1, and all are directions of the opening part 6 in the boundary part 8 of the opening part 6 and the adhesion sealing part 5. In FIG. 8c, 8d, 8e and 8f are formed. By forming the protruding portions 8c, 8d, 8e, and 8f in this way, the same effects as in FIGS. 4 and 5 can be obtained. In these drawings, an arrow L indicates a portion having the maximum length in the distance from the boundary portion 8 between the opening 6 and the adhesive sealing portion 5 to the outer edge of the opening 6. The opening part 6 is a part picked by two fingers, and the maximum length L in the present invention is set to 6 mm or more and 40 mm or less. By setting in this way, the opening part 6 can be picked favorably and reliably, and the wrapping operation of the packaging materials 2 and 3 can be easily performed. In this case, the lower limit of the maximum length L is more preferably 8 mm or more, further preferably 10 mm or more, and most preferably 15 mm or more. Moreover, as an upper limit, 36 mm or less is more preferable, 32 mm or less is further more preferable, and 30 mm or less is the most preferable.

  In the present invention, the above opening 6 is embossed. Embossing is a process of forming irregularities on the packaging material by embossing. As shown in FIG. 1, the embossing 9 may be formed in the opening 6 in one of the packaging materials (second packaging material 3). As shown in FIG. You may form in the opening part 6 in. In this case, as the embossing 9, it is only necessary to form irregularities on the packaging material, such as straight or wavy grooves, turbulent grooves such as scratches, dotted or cylindrical, triangular, rectangular, polygonal, etc. Projections and / or recesses such as prismatic or lattice shapes may be used. As this embossing 9, what has a some convex part in the single side | surface or both surfaces of a packaging material is preferable.

  10-13 show respective embodiments of embossing. As shown in these drawings, by performing embossing 9, a plurality of convex portions 10 and a plurality of concave portions 11 are formed in the opening 6. Each of the plurality of convex portions 10 protrudes upward while being surrounded by the concave portion 11. The plurality of convex portions 10 are formed at a substantially equal interval and aligned in a plurality of rows. Thus, by forming the convex part 10 and the recessed part 11 in the opening part 6, when picking the opening part 6 with a finger, a finger becomes difficult to slip and it becomes easy to pinch the opening part 6. Therefore, the packaging material can be easily peeled off. In order to facilitate the picking operation of the opening portion 6, it is preferable that the convex portions 10 of the embossing 9 are formed so as to be distributed over substantially the entire area of the opening portion 6.

  In the embossing 9 shown in FIGS. 10 and 11, each corner portion at the top of the convex portion 10 is rounded. Thereby, when the convex part 10 is picked by the belly of two fingers from both sides in the thickness direction of the packaging material, the air in the convex part 10 is compressed without escaping from the convex part 10 and functions as an air cushion. Therefore, the food package 1 can be opened more reliably. The shape of the convex portion 10 may be circular as shown in FIG. 12, or may be a rounded triangle as shown in FIG. Not limited to this, the convex portion 10 may have any shape as long as it protrudes surrounded by the concave portion, such as a cylindrical shape, a prismatic shape, a conical shape, a pyramidal shape, a trapezoidal shape, or a hemispherical shape.

  In the embossing 9, the concave portion 11 surrounding the convex portion 10 is preferably formed so that the line connecting the valley bottom points (vertex portion of the convex portion) of the concave portion 11 forms a substantially lattice shape on the surface of the packaging material. . In this case, the length of one side of each lattice angle forming the lattice shape is preferably 1 mm or more and 10 mm or less. The lower limit of the length of one side is more preferably 2 mm or more, and further preferably 3 mm or more. Moreover, as an upper limit, 7.5 mm or less is more preferable, and 5 mm or less is further more preferable.

  The convex portion 10 shown in FIGS. 10 to 13 has a quadrangular shape on the concave portion 11 side (bottom side), and the length of this one side is preferably 0.5 mm or more and 8 mm or less. The lower limit of this side is more preferably 1 mm or more. Moreover, as an upper limit, 6.5 mm or less is more preferable, 4.5 mm or less is further more preferable, and 2.5 mm or less is the most preferable. By setting in this way, when the convex part 10 is picked by the belly of two fingers from both sides in the thickness direction of the packaging material, it can be more reliably picked, and the food packaging body 1 can be easily opened. it can.

  In the food packaging body 1 described above, since it is only necessary to perform dimension setting on the opening 6 and embossing 9 on the opening 6, the structure for opening can be simplified. In addition, since the packaging material is simply embossed, it can be easily manufactured, and it is not necessary to manufacture the two packaging materials with individual molds, thus reducing the number of molds. The food package can be provided at low cost.

  As the manufacture of the food packaging body 1 described above, the food wrapping portion 4 is formed into a concave shape by deep-drawing into one wrapping material (for example, the second wrapping material 3). Alternatively, after embossing 9 is applied to the opening 6 of 3 and after the food is stored in the food wrapping portion 4, each of the two packaging materials 2 and 3 is overlapped. And it can carry out by forming the adhesion sealing part 5 by heat-sealing the part except the food inclusion part 4 and the opening opening part 6 mutually in this superposition state.

  In the production of the present invention, it is preferable to perform deep drawing and embossing in the same process, and thus the production process can be simplified.

It is a longitudinal cross-sectional view of embodiment of the food packaging body of this invention. It is a longitudinal cross-sectional view of another food packaging body. It is a top view of a food packaging body. It is a top view of another food packaging body. It is a top view of another food packaging body. It is a top view which shows the maximum length of an opening part. It is a top view which shows the maximum length of another opening part. It is a top view which shows the maximum length of another opening part. It is a top view which shows the maximum length of another opening part. It is a top view which shows embossing. It is the sectional view on the AA line in FIG. It is a top view which shows another embossing. It is a top view which shows another embossing.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Food packaging body 2,3 Packaging material 4 Food wrapping part 5 Adhesion sealing part 6 Unsealing part 8 Opening part and boundary part of adhesion sealing part 8a, 8b, 8c, 8d, 8e, 8f Projecting part 9 Embossing 10 Convex part 11 Concave part

Claims (11)

A food wrapping portion surrounded by two wrapping materials, an adhesive sealing portion surrounding the food wrapping portion and the two wrapping materials bonded to each other so as to be peelable from each other, and an outer edge portion of the adhesive sealing portion Two packaging materials are in a non-adhesive state, and in a food packaging body comprising an opening portion that becomes a pulling portion for peeling off the adhesive sealing portion,
The maximum length from the boundary between the opening portion and the adhesive sealing portion to the outer edge of the opening portion is 6 mm or more and 40 mm or less, and at least one surface of two packaging materials in the opening portion is embossed. The food packaging body characterized by the above-mentioned.   The two packaging materials include a first packaging material made of a thermoplastic resin film and a second packaging material made of a thermoplastic resin plate or film, and the embossing is performed on one or both surfaces of at least one film. The food packaging body according to claim 1, wherein the food packaging body is formed to have a plurality of convex portions.   The food packaging body according to claim 2, wherein the food wrapping portion has a concave shape formed by performing deep drawing on the second wrapping material.   The food packaging according to any one of claims 1 to 3, wherein a boundary between the opening portion and the adhesive sealing portion is formed in a shape having a portion protruding to the opening portion side. body.   The food packaging body according to claim 1 or 2, wherein the convex portions are distributed over substantially the entire area of the opening portion. A food wrapping portion surrounded by two wrapping materials, an adhesive sealing portion surrounding the food wrapping portion and the two wrapping materials bonded to each other so as to be peelable from each other, and an outer edge portion of the adhesive sealing portion Two packaging materials are in a non-adhesive state, and is a method for producing a food packaging body comprising an opening portion serving as a pulling portion for peeling off the adhesive sealing portion,
The maximum length from the boundary between the opening part and the adhesive sealing part to the outer edge of the opening part is 6 mm or more and 40 mm or less, and embossed on at least one surface of the two packaging materials in the opening part A method for producing a food package, characterized by performing processing.   As the two wrapping materials, a first wrapping material made of a thermoplastic resin film and a second wrapping material made of a thermoplastic resin plate or film are used, and at least one film has one or both surfaces with a plurality of convex portions. The method for producing a food package according to claim 6, wherein the embossing is performed so that the embossing is performed.   After forming the food wrapping part into a concave shape by deep-drawing the second wrapping material, and embossing the opening portion of the first wrapping material and / or the second wrapping material, After the food is contained in the food wrapping part, each of the two wrapping materials is superposed, and in this superposed state, the portions excluding the food wrapping part and the opening opening part are heat-bonded to each other to adhere The method for producing a food package according to claim 6 or 7, wherein a sealing part is formed.   The method for producing a food package according to claim 7 or 8, wherein a thermoplastic resin film is used as the second packaging material, and the deep drawing and embossing are performed on the film in the same step. .   10. The adhesive sealing part according to claim 6, wherein the adhesive sealing part is formed so that a boundary between the opening part and the adhesive sealing part has a portion protruding toward the opening part. 10. The manufacturing method of the food packaging body of description.   The said two packaging materials are adhere | attached so that the boundary of the said opening part and an adhesive sealing part may have a waveform shape, The manufacturing of the food packaging body of any one of Claim 6 thru | or 10 characterized by the above-mentioned. Method.

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