JP2013220846A - Sealed package - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sealed package that is sealed so as to have a film external ear piece formed, and that can be smoothly unsealed.SOLUTION: A sealed package 10 includes a cylindrical film 2 formed having a longitudinal seal portion 3 formed by putting both edges of a belt-like sealable material film one over the other and fusing the overlap portion along the length of the film, a sealing member 4 sealing both opening portions of the cylindrical film 2 filled with contents 8, and a film external ear piece 2b formed of one edge of the material film and projecting out of the cylindrical film 2 in a belt-like shape. The film external ear piece 2b is provided with a scar processing portion 9 having a scar 20 formed in a prescribed shape, the scar 20 including a first cut 20a extending obliquely to the length direction.

Description

  The present invention relates to a hermetic package.

  2. Description of the Related Art Conventionally, as a technique for facilitating opening of a package body that wraps food or the like, a technique for processing a scar on the edge of the package body is known (for example, see Patent Document 1). In this technique, the film edge forming the package is subjected to scratch processing, so that the film can be easily torn by hand at the time of opening.

JP 61-142159 A

  In addition, as a method for wrapping processed products such as fish meat, livestock ham / sausage, cheese, sheep gourd, wairo, etc., these packages are filled into a tubular film molded body in which a resin film is sealed in an envelope, and the upper end and A method of ligating (sealing) the lower end is widely used. In this type of package, one edge of the film is sealed so as to protrude outside the package, and the protruding edge (hereinafter referred to as “film outer ear piece”) is subjected to scratch processing in Patent Document 1. May be.

  However, in order to open this type of package, it is not necessary to tear only the film outer ear piece, and it is also necessary to perform a special operation such as peeling off the seal portion. Therefore, the consumer intentionally performs a complicated opening operation. There may be cases. Therefore, depending on the opening operation of the consumer, even if the film outer ear piece is easily torn, the opening of the package may not proceed smoothly thereafter.

  Therefore, an object of the present invention is to provide a hermetic package that enables smooth opening in a hermetic package that is sealed so as to form a film outer ear piece.

  According to the studies by the present inventors, generally, when a film outer ear piece of this type of sealed package is torn, consumers tend to pull the film outer ear piece obliquely with respect to the longitudinal direction. I found out. At this time, when the scratch processing of patent document 1 is applied to the film outer ear piece, it was found that the film outer ear piece that is pulled obliquely may be cut off in the middle, and the smooth opening operation may be hindered. . And, the present inventors have found that in order to enable smooth opening of the package, it is important to smoothly perform the opening operation of the consumer trying to pull the film outer ear piece diagonally, The present invention has been completed.

The present invention provides the following (1) to (5).
(1) A cylindrical film formed by superimposing both side edge portions of a sealable strip-shaped material film and fusing the overlapped portion in the longitudinal direction of the material film to form a vertical seal portion;
A sealing portion that seals both openings of the tubular film filled with contents;
A film outer ear piece consisting of one side edge of the material film and projecting into a strip shape outside the cylindrical film;
The film outer ear piece is provided with a scar processed portion formed with a scar of a predetermined shape,
The wound package includes a first cut extending obliquely with respect to the longitudinal direction.
(2) The sealing portion is
The hermetic package according to (1), further comprising a lateral seal portion formed by fusing the opening of the tubular film in the width direction of the material film.
(3) The sealed package according to (1) or (2), wherein the material film is a heat-shrinkable film.
(4) The scar is
It further includes a second cut formed at a position adjacent to the first cut in the longitudinal direction and inclined in a direction opposite to the tilt direction of the first cut with respect to the longitudinal direction. The sealed package according to any one of (1) to (3).
(5) The scar is
A third cut extending on an extension of the first cut at a position closer to the longitudinal seal than the first cut;
The sealed package according to (4), further comprising: a fourth cut extending on an extension line of the second cut at a position closer to the vertical seal portion than the second cut. .
(6) The scar processing portion is
The sealed package according to any one of (1) to (5), comprising a plurality of the scars arranged in the longitudinal direction.
(7) The scar is
The seal according to any one of (1) to (6), wherein the seal does not include a cut extending in the longitudinal direction and does not include a cut extending in a direction orthogonal to the longitudinal direction. Packaging body.

  ADVANTAGE OF THE INVENTION According to this invention, in the sealed package body of the type sealed so that the film outer ear piece may be formed, the sealed package body which can be smoothly opened can be provided.

It is a perspective view which shows typically a mode that the sealing package body which concerns on 1st Embodiment of this invention is opened. It is the II-II sectional view taken on the line of the sealed package shown in FIG. These are perspective views which show the other example of the structure of the sealing part of a hermetic package, respectively. It is a figure which expands and shows a part of film outer ear piece of the sealed packaging body shown in FIG. (A) is a figure which expands and shows a part of film outer ear piece of the sealed package which concerns on 2nd Embodiment of this invention, (b) is the film outer ear of the sealed package which concerns on 3rd Embodiment. It is a figure which expands and shows a part of piece. It is a figure which shows the scar processed part 9 of the sealed package body which concerns on the comparative example 1. FIG.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the drawings, the same elements are denoted by the same reference numerals, and redundant description is omitted. Further, the positional relationship such as up, down, left and right is based on the positional relationship shown in the drawings unless otherwise specified, and the dimensional ratio in the drawing is not limited to the illustrated ratio. Further, the present invention is not limited to the following embodiments, and can be implemented with various modifications within the scope of the gist thereof.

(First embodiment)
As shown in FIGS. 1 and 2, the sealed package 10 according to the present embodiment is a type of package called a “rocket package”, and is used as a container for storing sausages and the like. The hermetic package 10 includes a cylindrical film 2 formed by an envelope pasting method. Specifically, both side edge portions of the belt-shaped material film 13 are overlapped, and the substantially central portion of the overlapped portion is heat-sealed with a predetermined width over the longitudinal direction of the film to form the vertical seal portion 3. Thereby, the cylindrical film 2 with which both edge parts were joined by the envelope sticking system is formed. The vertical seal portion 3 is formed by heat sealing, high frequency sealing, ultrasonic welding, or the like.

  The sealed package 10 accommodates the contents 8 in a state where the tubular film 2 made of a flexible film is expanded in a cylindrical shape by the internal pressure from the contents 8. Here, fish meat, livestock ham, or sausage is illustrated as the contents 8, but cheese, sheep gourd, sea bream, etc. may be accommodated. Further, the sealed package 10 may be printed for the purpose of clearly showing the opening location to the consumer. Printing on the sealed package 10 is performed from the sealing portion 5 that seals the openings at both ends of the tubular film 2 filled with the contents 8 shown in FIG. 1 and the other side edge of the tubular film 2. A film inner ear piece 2a that protrudes in the form of a strip on the inner side, a film outer ear piece 2b that is formed from one side edge of the tubular film 2 and protrudes outward in a band shape, and a film outer ear piece on the surface of the tubular film 2 It is preferable to apply to the printing unit 7 which is an area covered with 2b.

  As shown in FIG. 1, characters “↑ can be opened from anywhere here” are printed on the printing unit 7. The printing unit 7 is provided in the vicinity of the vertical seal unit 3 along the vertical seal unit 3 and is provided not in the exposed surface of the sealed package 10 but in an area covered with the film outer ear piece 2b. The surface of the tubular film 2 (the surface of the printing unit 7) and the inner surface of the film outer ear piece 2b are in contact with each other in a tight state. For this reason, even if the sealed package 10 is boiled or retorted, it is possible to sufficiently suppress the characters on the printing unit 7 from being peeled or thinned by heat or rubbing. Note that the printing unit 7 is not limited to one printed with characters, but may be one printed with symbols or patterns.

  The width of the printing unit 7 (W1 in FIG. 1) is preferably 3 to 10 mm, and more preferably 5 to 8 mm. By setting the width W1 to 3 mm or more, the size of characters and symbols of the printing unit 7 can be sufficiently recognized by the user. On the other hand, the material film for covering the printing unit 7 by setting the width W1 to 10 mm or less. 13 (film outer ear piece 2b) can be prevented from increasing in material cost.

  If the width | variety (W2 of FIG. 1) of the film outer ear piece 2b can cover the printing part 7, there will be no restriction | limiting in particular, Preferably it is 5-20 mm, More preferably, it is 10-15 mm.

  As shown in FIG. 1, the scar outer edge piece 2b is provided with a scar scar processing portion 9 formed by scratch processing. In this case, it is preferable that the printing part 7 is covered with the remaining part of the film outer ear piece 2b excluding the scratched part 9. Scratch processing means processing for forming a minute scratch at the end of the film, and is intended to facilitate tearing of the film and improve openability. If the scar processing part 9 and the printing part 7 do not overlap, it is possible to prevent the inflow of hot water from the scar and the rubbing between the printing part 7 and the scar processing part 9 in the boil or retort processing. This is preferable because it is possible. Moreover, since the visibility of the printing part 7 does not fall, it is preferable.

  The tubular film 2 is made of a band-shaped material film 13 and is preferably transparent or translucent to visible light from the viewpoint of the visibility of the printing unit 7. Moreover, it is preferable to use a heat-shrinkable film for the material film for the following reason. That is, in this case, since the tubular film 2 has heat shrinkability, the sealed package 10 is finished in a tight state by boiling or retorting. At the same time, the printing unit 7 and the film outer ear piece 2b contract and come into contact with each other in a tight state, so that they are difficult to shift. Further, since the film outer ear piece 2b is in close contact with the printing unit 7 to protect it, the printing is hardly peeled off.

  The heat shrinkage rate of the heat shrinkable film is preferably 15% or more at 120 ° C. in both the longitudinal direction and the transverse direction, and the heat shrinkage rate at 90 ° C. is preferably 5% or more. Since the film satisfying this condition has sufficient tension, the printing on the printing unit 7 is difficult to peel off. Further, the heat shrinkage rate of the heat shrinkable film is preferably 40% or less at 120 ° C. or 30% or less at 90 ° C. in both the longitudinal direction and the transverse direction. A film that satisfies this condition is moderately shrunk and difficult to be loaded on the vertical seal portion 3 of the hermetic package 10, so that it is difficult to break the bag. In addition, the heat shrink rate of a heat-shrinkable film means the value measured by the measuring method based on ASTM D-2732.

  The effect of the tubular film 2 having heat shrinkage can be obtained even during the boil or retort treatment. For example, in order to make it difficult to peel off when performing retort processing at 120 ° C. for 20 minutes, the process of raising the water temperature to 120 ° C. as well as that the sealed package 10 is in a tight state at 120 ° C. However, it is preferable that the sealed package 10 is in a tight state. As a representative point of the temperature in this temperature raising process, 90 ° C. can be used. As described above, when the thermal shrinkage rate at 90 ° C. is 5% or more in both the vertical direction and the horizontal direction, the tight state of the sealed package 10 is maintained, and the contact between the printing unit 7 and the film outer ear piece 2b becomes difficult to shift. Since the protection of the printing portion is maintained, the printing is hardly peeled off even during the temperature rising process.

  The heat shrinkage rate of the heat-shrinkable film can be controlled by the stretching ratio or the stretching temperature during film production, or the heat treatment during or after stretching. Specifically, the thermal shrinkage rate is increased by increasing the draw ratio or lowering the stretching temperature or the heat treatment temperature. On the other hand, the thermal shrinkage rate tends to decrease by decreasing the stretching ratio or increasing the stretching temperature or the heat treatment temperature.

  Specific examples of the material film 13 include, for example, VDC / VC (vinylidene chloride / vinyl chloride copolymer), VDC / MA (vinylidene chloride / methyl acrylate copolymer), HIPS (impact polystyrene), PVDC (polyethylene). Examples thereof include vinylidene chloride), PVC (polyvinyl chloride), PA (polyamide), PE (polyethylene), PP (polypropylene), EVOH (ethylene-vinyl alcohol copolymer), and the like.

  As described above, the material film 13 may be a single layer film or a multilayer film in which a plurality of films are laminated. From the viewpoint of imparting various functions, for example, a multilayer film in which a sealant film is laminated on one side and / or both sides of a base film is preferably used. In addition, the multilayer film includes a film in which an adhesive layer, a gas barrier layer, or the like is interposed between each essential layer. This type of multilayer film includes, for example, a dry laminating method in which two or more films are bonded together, an extrusion laminating method in which the other resin composition is melt-extruded and laminated on one film, and a resin composition. It can be manufactured by a known method such as a co-extrusion method in which a laminate is formed by cooling after extrusion. In the case of a multilayer film, the film preferably includes at least one layer having gas barrier properties. More specifically, a gas barrier multilayer film comprising at least three layers of a core layer made of a polyamide polymer or a PVDC polymer and both outer layers made of a polyolefin polymer having a melting point of 90 to 170 ° C. is preferable. The polyamide-based polymer that forms the barrier layer has oxygen barrier properties and pinhole resistance, and the polyolefin-based polymer that is the seal layer has heat-sealing properties and water vapor barrier properties.

  Examples of the polyolefin polymer include an ethylene homopolymer, an ethylene polymer such as ethylene and an α-olefin copolymer having 4 to 8 carbon atoms, a propylene homopolymer, a copolymer of propylene and ethylene, propylene and Examples thereof include a propylene polymer such as a copolymer with an α-olefin having 4 to 8 carbon atoms and a copolymer of propylene, ethylene and an α-olefin having 4 to 8 carbon atoms. These polyolefin polymers may be random copolymers or block copolymers. Specific examples of the α-olefin having 4 to 8 carbon atoms include 1-butene, 4-methyl-1-pentene, 1-pentene, 1-hexene, 1-octene, and the like. Not. These polymers may be used alone or in combination of two or more. Of these, propylene-based polymers such as ethylene-α-olefin copolymers, propylene-ethylene copolymers, and propylene-ethylene-1-butene copolymers can be preferably used because they are relatively inexpensive.

  From the viewpoint of stretchability, the polyolefin polymer preferably has a value represented by weight average molecular weight (Mw) / number average molecular weight (Mn) of 1.5 to 3.5, more preferably 1.5. ~ 3.0.

  As the polyamide polymer, an aliphatic polyamide polymer such as nylon 6 or nylon 6/66 or an aromatic polyamide polymer can be used. In particular, from the viewpoint of gas barrier properties, an aromatic polyamide polymer containing an aromatic diamine unit is more preferable.

  In the multilayer film in which the polyolefin polymer and the polyamide polymer are laminated, if the adhesive force between the films is not sufficient, an adhesive layer can be interposed as necessary. Examples of the resin used as the adhesive layer include acid-modified polyolefin. Among them, ethylene homopolymer, ethylene-α-olefin copolymer or ethylene-propylene copolymer is an acid such as maleic acid or an anhydride thereof. An acid-modified product modified with a product is preferred.

  The PVDC-based polymer contains 80 to 97% by mass of vinylidene chloride and means a copolymer of vinylidene chloride and vinyl chloride or a copolymer of vinylidene chloride and methyl acrylate. The weight average molecular weight of the PVDC polymer is preferably 80,000 to 130,000, more preferably 100,000 to 125,000.

  PVDC polymers include liquid plasticizers such as dibutyl sebacate, acetyl tributyl citrate, glycerin diacetomonolaurate, epoxidized soybean oil, epoxidized linseed oil, bisphenol A diglycidyl ether, epoxidized octyl stearate, Liquid additives such as heat stabilizers typified by epoxy compounds such as epoxidized palm oil can be added, and the total amount of the liquid additives is preferably in the range of 1 to 10% by weight. Also, organic or inorganic pigments, spherical or amorphous silicon dioxide, calcium carbonate, magnesium oxide represented by pear finish, lubricants represented by fatty acid amide, etc. can be added. The amount is preferably in the range of 0.01 to 1.0% by weight. Depending on the application, a surfactant such as sorbitan fatty acid ester, polyglycerin fatty acid ester, polyoxyethylene fatty acid ester and the like may be added in an amount of 0.1 to 1.0% by weight.

  The thickness of the material film 13 is not particularly limited and can be arbitrarily set. However, considering the use of fish meat, livestock meat ham, sausage, etc., the total thickness (total thickness) of the material film 13 is 30. It is preferably ˜50 μm.

  In general, the occurrence frequency of bag breakage during retort processing and the easy-openability during opening are in a trade-off relationship, and when the thickness is increased, the occurrence frequency of bag breakage during retort processing tends to decrease. On the other hand, when the thickness is reduced, it tends to be easily opened with an appropriate force at the time of opening. It is preferable that the total thickness is 30 to 50 μm because both of these characteristics can be maintained in a well-balanced manner.

  The width of the vertical seal portion 3 is preferably 0.5 to 3.0 mm. If the width of the vertical seal portion 3 is 0.5 mm or more, the peeling failure of the vertical seal portion 3 is reduced, and if the width of the vertical seal portion 3 is 3.0 mm or less, easy-openability can be sufficiently secured. In addition, the term “can easily ensure easy opening” as used herein specifically means that the measured value when the 180 degree peel stress of the fused portion is measured by the following method is 2 N / 15 mm width or more, 12 N / 15 mm width or less, and 3N / 15 mm width or more and 8 N / 15 mm width or less are more preferable. If the 180-degree peel stress is less than 2N / 15 mm width, the bag is likely to be broken (punctured) when heated by, for example, retorting due to insufficient fusion. On the other hand, if the 180 degree peeling stress exceeds 12 N / 15 mm width, the sealing strength is too strong and the easy-opening property tends to be insufficient. In addition to this, the material film is excessively melted and the thickness of the material film at the seal portion is reduced, so that the portion easily breaks.

  The measuring method of 180 degree peeling stress is ASTM F-88 FIG. 1 It is the following method based on LAP SEAL. That is, a strip-shaped test piece having a width of 15 mm and a length of 50 mm, in which the fused portion is present at the substantially central portion in the longitudinal direction (the fused wire is perpendicular to the longitudinal direction at the substantially central portion in the longitudinal direction of the strip). The existing one) is cut out from the sealed package. The 180 degree peeling stress is measured for this using a Tensilon universal testing machine (trade name: RTC-1210, manufactured by Orientec Co., Ltd.). At this time, the test piece is held by two upper and lower film chucks so that the test piece is pulled in the vertical direction with the fused portion as a base point. The distance between the film chucks in the initial measurement was 10 mm, and the 180 ° peel strength of the fused part was measured under the conditions of a tensile speed of 300 mm / min (one measurement / one), and the 180 test pieces were peeled 180 °. Calculate the average value of the stress.

  The sealing part 5 is a part formed at both ends of the sealed package 10, and seals both openings of the tubular film 2 filled with the contents 8. As a method of forming the sealing portion 5, after the film is focused, a method of forming a horizontal seal portion by applying ultrasonic waves, high frequency, or heat to the focusing portion to form a horizontal seal portion, or a synthetic resin wire is used as the focusing portion. A method of winding around, fusing the wound portion, a method of winding (ligating) a sealing member 4 made of a metal wire such as aluminum, and a method of using these in combination For example, a known method can be employed.

  In the sealing part 5, as shown in FIG. 3, an ultrasonic wave, a high frequency, or a heat | fever is applied to the cylindrical film 2 with which the content was filled, without performing the ligation process by the sealing member 4. As shown in FIG. Lateral sealing may be performed by a known technique such as fusing. In this case, the sealing part 5 is formed with a lateral seal part 6 formed by fusing both openings of the tubular film 2 in the width direction of the material film, and is a so-called pillow packaging type sealed packaging body. Is obtained.

  The sealed package 10 as described above can be easily obtained by using a known automatic filling and packaging machine used for food rocket packaging, for example, “ADP (registered trademark)” manufactured by Asahi Kasei Chemicals Corporation. it can. At this time, as the raw film of the sealed package 10, a film in which the scar processed portion 9 is formed in advance on one side edge may be used. In addition, in a known apparatus for manufacturing this type of scratch-processed original film, an original film having a desired pattern of the scratch processing portion 9 can be manufactured by appropriately changing the tool for forming the scratch. .

  Next, the scar processing portion 9 of the sealed package 10 will be described in more detail with reference to FIG. A dashed-dotted arrow A in the figure indicates the longitudinal direction of the sealed package 10.

  As shown in FIG. 4, the scar processing section 9 has a large number of scars 20 arranged in the longitudinal direction of the sealed package 10 over the entire length of the film outer ear piece 2 b. One scar 20 includes four linear cuts 20a, 20b, 20c, and 20d arranged radially, and has an X shape as a whole. Each of the cuts 20a to 20d is formed by cutting the film outer ear piece 2b in the thickness direction by a predetermined scar processing applied to the material film 13.

  The first cut 20a extends obliquely with respect to the longitudinal direction (arrow A direction). The second cut 20b is located adjacent to the first cut 20a in the longitudinal direction A, and is inclined with respect to the longitudinal direction A in a direction opposite to the inclination direction of the first cut 20a. For example, the first and second cuts 20a and 20b extend at an angle of 45 ° with respect to the longitudinal direction A. The first and second cuts 20a and 20b are both formed so as not to reach the edge 2c of the film outer ear piece 2b. Since the first and second cuts 20a and 20b are formed so as not to reach the edge 2c of the film outer ear piece 2b, it is possible to avoid the film outer ear piece 2b from being easily damaged except when opened by the consumer.

  The third cut 20c is located at a position adjacent to the second cut 20b in the circumferential direction of the tubular film 2 (direction orthogonal to the arrow A), and is more vertically sealed than the first and second cuts 20a and 20b. It is on the side close to part 3. The third cut 20c extends on an extension line of the first cut 20a, and is formed so as not to reach the first cut 20a or the vertical seal portion 3. The fourth cut 20d is at a position adjacent to the first cut 20a in the circumferential direction of the tubular film 2, and is closer to the vertical seal portion 3 than the first and second cuts 20a and 20b. The fourth cut 20d extends on an extension line of the second cut 20b, and is formed so as not to reach the second cut 20b or the vertical seal portion 3.

  As described above, the scar 20 constituting one unit of the scar processed portion 9 is composed of four line-segment cuts 20a to 20d that are not connected to each other, and has an X-shape as a whole. Due to the structure in which none of the four cuts 20a to 20d are connected to each other, the damage of the scar processed portion 9 and the deformation of the pattern of the scar 20 due to the film contraction are suppressed even in the boil and retort processing. Further, the scar 20 includes only the cuts 20a to 20d extending obliquely with respect to the longitudinal direction A, does not include the cut extending in the longitudinal direction A, and extends in a direction orthogonal to the longitudinal direction A. Does not include existing cuts.

  Next, the effect by the sealed package 10 provided with said scar processed part 9 is demonstrated.

  According to the studies by the present inventors, generally, when a consumer tears the film outer ear piece 2b of this type of sealed package 10, the film outer ear piece 2b tends to pull in an oblique direction with respect to the longitudinal direction A. Was found to be strong. On the other hand, according to the sealed package 10, since the tear of the film outer ear piece 2b is induced in an oblique direction by any of the obliquely extending cuts 20a to 20d in the scar 20, the film outer ear piece 2b is When the operation of pulling obliquely is performed, the film outer ear piece 2b is torn smoothly. Therefore, it is avoided that an excessive force acts on the film outer ear piece 2b pulled by the consumer, and the possibility that the film outer ear piece 2b breaks during the opening is reduced. As a result, it is highly possible that the opening of the sealed package 10 proceeds smoothly only by a series of operations such as picking up the film outer ear piece 2b and pulling the film outer ear piece 2b obliquely, and smooth opening of the sealed package 10 is achieved. . Moreover, since the scar 20 is X-shaped, it is relatively easy for consumers to see. Therefore, it is possible to prompt the consumer to tear the film outer ear piece 2b in an oblique direction along the X-shaped oblique line.

  Further, if the scar 20 includes a cut extending in the longitudinal direction A or a cut extending in a direction perpendicular to the longitudinal direction A, the tear that the consumer intends to form in the film outer ear piece 2b It is induced by such a break, and a tear advances in a direction (a direction perpendicular to the longitudinal direction A or the longitudinal direction A) that the consumer does not intend. As a result, an unreasonable force acts on the film outer ear piece 2b pulled diagonally by the consumer, and the film outer ear piece 2b may break during the opening process, so that smooth opening cannot be achieved. On the other hand, according to the sealed package 10, since the scar 20 does not include a cut extending in the longitudinal direction A or a cut extending in a direction perpendicular to the longitudinal direction A, the film outer ear piece 2b as described above is not included. The possibility of breakage can be reduced.

(Second Embodiment)
As shown in FIG. 5A, the scar processing portion of the sealed package according to this embodiment includes a scar 220. The scar 220 is obtained by omitting the third cut 20c and the fourth cut 20d in the above-described scratch 20 (see FIG. 4). The sealed packaging body provided with such a scar processed part also has the same effects as the sealed packaging body 10 of the first embodiment.

  However, in the sealed package 10 of the first embodiment, the tear in the oblique direction of the film outer ear piece 2b by the opening operation is two cuts on the same straight line (for example, the first cut 20a and the third cut 20c). ), The hermetic package 10 according to the first embodiment is superior to the present embodiment (FIG. 5A).

(Third embodiment)
As shown in FIG. 5B, the scar processing part of the sealed package according to the present embodiment includes a scar 320. The scar 320 is obtained by omitting the second cut 20b in the above-described scar 220 (FIG. 5A). The sealed package body provided with such a scar processed part also has the same effects as the sealed package bodies of the first and second embodiments.

  However, in the sealed package of the first and second embodiments, when the film outer ear piece 2b picked up by the consumer is pulled downward and to the right in FIG. 5A, it is pulled downward and to the left. In the point which can respond to both cases, the sealed packaging body of 1st and 2nd embodiment is excellent compared with this embodiment (FIG.5 (b)).

  As mentioned above, although embodiment of this invention was described, this invention is not restricted to the said embodiment, You may change in the range which does not change the summary described in each claim. For example, a scar having a configuration having only one of the first to fourth cuts 20a to 20d (see FIG. 4) may be employed. Moreover, you may employ | adopt the scar of the structure which has any two or three of the 1st-4th cut | interruptions 20a-20d.

  In addition, it is not essential to arrange a plurality of scars in the longitudinal direction, and a scar processing portion having a configuration in which at least one scar is provided on the film outer ear piece may be employed. However, in order to widen the position where the opening operation can be started on the film outer ear piece 2b, a configuration in which a plurality of scars are arranged in the longitudinal direction as in the first to third embodiments is preferable.

  EXAMPLES Hereinafter, although an Example demonstrates this invention in detail, this invention is not limited only to these Examples.

The sealed packages of Examples 1 to 3 and Comparative Example 1 below were prepared, and the unsealing properties of each package were measured and evaluated. The measuring method and evaluation method of the openability of the package are as follows.
About 500 sealed packaging bodies, the outer ear piece was picked in an oblique direction with respect to the longitudinal direction of the pinch and opened. The number of bottles opened in an oblique direction was counted to determine the ratio, and evaluation was performed according to the following criteria.
○: Ratio of opening in the oblique direction is 90% or more ×: Ratio of opening in the oblique direction is 70% or less [Example 1]
(Film production process)
As a material film, a 100 mm wide NY multilayer film (Barrierlon MF: manufactured by Asahi Kasei Chemicals Corporation) was used, and wounds were formed in the shape of FIG.

(Packaging process)
Next, the filling of the fish meat was performed using an ultrasonic sealing type automatic filling and packaging machine ("ADP (registered trademark)" manufactured by Asahi Kasei Chemicals Corporation).
It was bent into a cylindrical shape with a tube making folder, and the side edges of the material film were overlapped. In this state, ultrasonic sealing was applied from outside the cylindrical part to ultrasonically seal the envelope, and a vertical seal part was formed to produce a cylindrical molded body having a folding width of 40 mm. Subsequently, fish sausage raw surimi was filled into the cylindrical molded body from the filling nozzle, and then both ends were ligated and sealed with aluminum wire, and the retort was performed at 120 ° C. for 20 minutes under the condition that the heated can pressure gauge pressure was 0.25 MPa. Processing was performed to obtain a sealed package.
[Example 2]
A sealed package was obtained in the same manner as in Example 1 except that the shape of the scar at the film end was as shown in FIG.
Example 3
A sealed package was obtained with the same contents as in Example 1 except that the shape of the scar at the film edge was as shown in FIG.
[Comparative Example 1]
A sealed package was obtained in the same manner as in Example 1 except that the shape of the scar at the film end was as shown in FIG. As shown in FIG. 6, linear scars 30 extending in a direction orthogonal to the longitudinal direction of the sealed package are intermittently arranged in a staggered pattern on the film outer ear piece 2 b of the sealed package of Comparative Example 1. ing.

Table 1 shows the evaluation of openability of the sealed packages of Examples 1 to 3 and Comparative Example 1. As shown in Table 1, it was found that disposing the scars in the oblique direction with respect to the longitudinal direction is excellent in the openability in the oblique direction.

  2 ... cylindrical film, 2b ... film outer ear piece, 2c ... edge of film outer ear piece, 3 ... vertical seal portion, 4 ... sealing member, 5 ... sealing portion, 6 ... horizontal seal portion, 8 ... contents, 9 ... Scratch processed part, 13 ... Material film, 20, 220, 320 ... Scratch, 20a ... First cut, 20b ... Second cut, 20c ... Third cut, 20d ... Fourth cut, A ... Longitudinal direction .

Claims (7)

A cylindrical film in which both side edges of a sealable strip-shaped material film are overlapped, and the overlapping portion is fused in the longitudinal direction of the material film to form a vertical seal portion;
A sealing portion that seals both openings of the tubular film filled with contents;
A film outer ear piece consisting of one side edge of the material film and projecting into a strip shape outside the cylindrical film;
The film outer ear piece is provided with a scar processed portion formed with a scar of a predetermined shape,
The wound package includes a first cut extending obliquely with respect to the longitudinal direction. The sealing part is
The hermetic package according to claim 1, further comprising a lateral seal portion formed by fusing the opening of the tubular film in the width direction of the material film.   The hermetic package according to claim 1 or 2, wherein the material film is a heat-shrinkable film. The scar is
It further includes a second cut formed at a position adjacent to the first cut in the longitudinal direction and inclined in a direction opposite to the tilt direction of the first cut with respect to the longitudinal direction. The sealed package according to any one of claims 1 to 3. The scar is
A third cut extending on an extension of the first cut at a position closer to the longitudinal seal than the first cut;
The sealed package according to claim 4, further comprising a fourth cut extending on an extension line of the second cut at a position closer to the longitudinal seal portion than the second cut. . The scar processing portion is
The hermetic package according to any one of claims 1 to 5, comprising a plurality of the scars arranged in the longitudinal direction. The scar is
The sealed package according to any one of claims 1 to 6, wherein the package does not include a cut extending in the longitudinal direction and does not include a cut extending in a direction orthogonal to the longitudinal direction. .

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