JP2018070211A - Sachet for liquid - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a liquid pouch which can be opened and dispensed with peace of mind without soiling fingers and surroundings with a sealed liquid substance when opening. In order to achieve the above problems, the present invention comprises an upper member made of a laminated body having a heat-sealing layer on the inner surface and a lower member, and the heat-sealing layer and the lower member of the upper member. A liquid pouch in which a liquid material having a peripheral joint on the periphery is sealed and packaged while facing the heat-sealing layer, and the upper member is a wing portion in which the surfaces of the heat-sealing layer are joined to each other. The wing portion extends outward from the wing base portion straddling one of the opposing end edges of the upper member, and a strong seal portion and a weak seal portion are provided in the area of the wing portion. It is a liquid pouch characterized by being opened from a weak seal portion by folding the liquid pouch in half around the wing base of the wing portion. [Selection diagram] Fig. 1

Description

  The present invention relates to a packaging bag used for hermetically wrapping liquid materials such as soy sauce, sauces, dressings, noodle soup, and more specifically, a liquid that can be opened and poured out without soiling fingers and the like with liquid materials when opened. Related to sachets.

  Conventionally, seasonings such as soy sauce, sauce, dressing, noodle soup are attached to take-out foods such as sushi, lunch boxes and salads. Since this seasoning is liquid, it is hermetically packaged in a liquid pouch that has a narrow pour-out portion and is easy to pour out. However, such a liquid sachet has a problem in that when it is opened, the liquid material pops out and soils fingers and clothes.

  In order to solve such a problem, a pouch with a pour-out path has been proposed in which irregularities that fit into each other are provided on two upper and lower films constituting the pour-out path in a narrow pour-out path. (For example, refer to Patent Document 1).

  The pouch with a pour-out path in Patent Document 1 is such that the film on the top and bottom surfaces of the pour-out path is in close contact with each other due to the concavities and convexities that fit into each other, and the liquid material can be prevented from popping out when the pour-out path is opened. It became. However, the liquid stays in the pouring path due to vibration during filling and distribution, so when tearing and opening the film on the top and bottom surfaces of the pouring path, the liquid that stays in the pouring path is contaminated with fingers and surroundings. Still there. Further, since tearing and opening are performed, there is a danger that a cut piece is generated at the time of opening, and the cut piece is eaten by mistake.

Japanese Patent No. 4074016

  Accordingly, the present invention has been made to solve the above-mentioned problems, and the purpose of the present invention is to open and pour out safely without contaminating the fingers and surroundings with a liquid material sealed and packaged when opening. It is to provide a liquid pouch.

As a result of diligent research, the inventors of the present invention eliminated the tearing and opening of the liquid pouch and found the new opening mechanism to arrive at the present invention.
That is, the present invention described in claim 1 is composed of an upper member made of a laminate having an inner surface provided with a heat fusion layer, and a lower member, and the heat fusion layer of the upper member and the heat fusion layer of the lower member, Is a liquid sachet in which a liquid material having a peripheral edge joint portion is hermetically packaged in a state where the peripheral surfaces are opposed to each other, and the upper member includes a wing portion in which the surfaces of the heat-fusible layer are joined to each other, The wing portion is extended outward from a wing base straddling between one opposing end edges of the upper member, and a strong seal portion and a weak seal portion are provided in the region of the wing portion, The liquid sachet is opened from the weak seal portion by folding the liquid sachet in two with the wing base portion of the wing portion as an axis.

  According to a second aspect of the present invention, in the liquid sachet according to the first aspect, the liquid sachet is vertically long, and the wing portion is arranged at a position approximately half the length of the long side. It is characterized by being.

  According to a third aspect of the present invention, there is provided the liquid pouch according to the first or second aspect, wherein the weak seal portion is provided at a substantially center between one opposing edges of the upper member of the wing portion. It is characterized by being arranged.

  According to a fourth aspect of the present invention, in the liquid pouch according to any one of the first to third aspects, the weak seal portion has a tapered shape outwardly from the wing base portion. It is characterized by.

  When opening the liquid sachet of the present invention, the liquid sachet can be safely opened and poured out without contaminating the fingers and surroundings with a liquid material sealed and packaged.

It is a perspective view showing one embodiment of a liquid pouch according to the present invention. It is the sectional view on the AA line of FIG. It is explanatory drawing which shows the state which the sachet for liquids concerning this invention decomposed | disassembled. It is explanatory drawing explaining the state which opens the liquid pouch which concerns on this invention.

The above-described present invention will be described in detail below with reference to the drawings.
1 is a perspective view showing an embodiment of a liquid pouch according to the present invention, FIG. 2 is a cross-sectional view taken along line AA of FIG. 1, and FIG. 3 is an explanatory view showing an exploded state of the liquid pouch according to the present invention. FIG. 4 is an explanatory view for explaining a state in which the liquid pouch according to the present invention is opened, in which P is a liquid pouch, O is a spout, 1, 1a and 1b are upper members, and 2 is a lower member. 3 is a peripheral joint part, 3u is an upper edge joint part, 3d is a lower edge joint part, 3l and 3r are side edge joint parts, 4 is a wing part, 4k is a wing base part, 4f is a wing tip, and 4s is a strong seal part. 4w is a weak seal part, 5 is a storage part, 6 is a liquid substance, 10 is a laminated body, 11 is a base material layer, 12 is a heat-fusion layer.

  As shown in FIGS. 1 and 2, the liquid pouch P of the present invention includes an upper member 1 and a lower member 2, and the upper member 1 includes a wing portion 4. The upper member 1 and the lower member 2 are composed of a laminated body 10 (see FIG. 3) having at least a heat fusion layer 12 (see FIG. 3) on the inner surface, and the heat fusion layer 12 and the lower member 2 of the upper member 1 are formed. This is a vertically long liquid pouch P having a configuration in which the peripheral joint portion 3 is provided at the periphery in a state where the heat-sealing layer 12 is opposed. A space surrounded by the upper member 1, the lower member 2, and the peripheral joint portion 3 forms a storage portion 5 that stores the liquid material 6. The liquid sachet P is not limited to a vertically long shape, but is a preferable form in consideration of openability.

  The vertically long liquid pouch P is provided with an upper edge joint 3u and a lower edge joint 3d on the opposite short sides of the periphery, and a side edge joint 3l and a side edge joint 3r on the opposite long sides of the periphery. It is a rectangular bag in plan view. The wing portion 4 is provided with a wing base portion 4k in which the surfaces of the heat-seal layer 12 (see FIG. 3) are bonded to each other and straddles between the edges of one opposing long side of the upper member 1. It is a rectangular shape extending outward from 4k. Furthermore, the wing part 4 is arranged in parallel with the upper edge joint part 3u or the lower edge joint part 3d at a position substantially half the length of the long side of the liquid pouch P. The wing portion 4 may be disposed at a position close to the upper edge joint portion 3u or the lower edge joint portion 3d, but the long side edge joint portion 3l or the side edge joint portion 3r is long. It is preferable to provide the wing portion 4 at an approximately half position because it is easy to apply internal pressure to the wing part 4 and it is easy to open.

  Further, in the region of the wing portion 4, a strong seal portion 4s and a weak seal portion 4w are provided. The strong seal portion 4s has a stronger seal strength (adhesion strength) than the weak seal portion 4w. For example, as shown in FIG. 1, the wing portion 4 is provided with a weak seal portion 4 w at substantially the center between one opposing side edge joint portion 3 l of the upper member 1 and the outer edge of the side edge joint portion 3 r, Strong seal portions 4s are arranged on both sides, and the weak seal portion 4w is configured to be sandwiched between the strong seal portions 4s. The weak seal portion 4w and the strong seal portion 4s are connected to each other from the wing base portion 4k of the wing portion 4 to the wing tip 4f facing the wing base portion 4k. The weak seal portion 4w can be provided close to the side edge joint portion 3l or the side edge joint portion 3r, but it is preferable that the weak seal portion 4w be provided at the approximate center between the side edge joint portion 3l and the outer edge of the side edge joint portion 3r. preferable. Furthermore, it is more preferable that the weak seal portion 4w has a tapered shape from the inside to the outside as shown in FIG. 1 (from the wing base portion 4k to the wing tip 4f), and the weak seal portion 4w is peeled open. When the spout O (see FIG. 4) is formed, the liquid material 6 is easily poured out.

  1 and 2 show a state in which the liquid material 6 is stored in the storage unit 5, the liquid pouch P includes an upper edge joint 3u, a lower edge joint 3d, a side edge joint 3l, or a side edge. Any one of the peripheral joints 3 of the joint 3r, for example, the lower edge joint 3d is opened, and after the liquid material 6 is filled into the storage part 5 of the liquid pouch P from the opening, the lower edge joint 3d is filled. It is heat sealed and sealed and packaged. In the figure, in order to clearly show the wing part 4, the wing part 4 is shown standing up. However, until the liquid pouch P is opened, the wing part 4 is in a state where it has fallen to either the upper member 1 a or the upper member 1 b. overlapping. Examples of the liquid material 6 filled in the liquid sachet P include soy sauce, sauce, dressing, noodle soup, and the like.

  FIG. 3 is an explanatory view showing the disassembled state of the liquid pouch P according to the present invention, FIG. 3 (a) shows the disassembled state, and FIG. 3 (b) is an enlarged cross-sectional view along the line BB. Show. The liquid sachet P of the present invention is composed of a laminated body having a heat fusion layer on its inner surface, for example, a lamination in which a base material layer 11 and a heat fusion layer 12 are laminated as shown in FIG. 3 (a) and 3 (b), the upper member 1 is thermally bonded using the body 10 with the upper member 1a and the upper member 1b facing each other with the surfaces of the heat-sealing layer 12 facing each other. The wing portion 4 is formed, the upper member 1 with the heat-fusible layer 12 as the lower surface and the lower member 2 with the heat-fusible layer 12 as the upper surface are overlapped, and the peripheral edge is thermally bonded to form the peripheral joint portion 3. Formed.

  Next, with reference to FIG. 4, a method of opening the package body in which the storage portion 5 of the liquid pouch P according to the present invention is filled with the liquid material 6 will be described. 4 is a cross-sectional view taken along line AA of FIG. 1 and shows a cross section of the weak seal portion 4w of the wing portion 4. FIG. As shown in FIG. 4 (a), the wing 4 is on the outside (opening side), and as shown in FIG. Fold it in half. By folding the liquid sachet P in half, the wing part 4 that has overlapped with either the upper member 1a or the upper member 1b is raised, the liquid 6 is pressurized, and further folded in two. When pushing pressure is applied in the direction (arrow direction) approaching each other with the finger from the outer surface side of the upper member 1a and the upper member 1b, the pressure of the liquid material 6 is further increased, and the weak seal portion 4w cannot resist the pressure, Peeling is started between the heat fusion layers 12 of the upper member 1a and the upper member 1b, and peeling proceeds from the wing base 4k toward the wing tip 4f (hereinafter referred to as seal retraction). This peeling phenomenon is achieved because the seal strength of the strong seal portion 4s is stronger than the seal strength of the weak seal portion 4w. When the liquid 6 is pressurized, the strong seal portion 4s peels off. Without this, the weak seal portion 4w can be peeled off first.

  When the pressure is further applied to the folded liquid sachet P, the backward movement of the seal progresses, and when the wing tip 4f is reached, the liquid sachet P is opened and peeled off by the backward movement of the seal as shown in FIG. A spout O is formed at a portion corresponding to the seal portion 4w, and the liquid 6 is poured out from the spout O. Unlike the conventional opening mechanism for tearing and opening the laminate, the present invention has an opening mechanism by peeling off the weak seal portion 4w. Therefore, the tearing piece is not cut off, so that no cut piece is generated. I don't eat. Further, since there is no tearing operation, the finger is not soiled by dripping from the tear opening as in the prior art.

  The strong seal portion 4s provided in the liquid pouch P of the present invention has a high seal strength (for example, a liquid state 6 can be maintained in a sealed state without causing liquid leakage or the like even when an external force is applied during transportation or storage. The weak seal portion 4w has a low seal strength (for example, a seal strength of 10 N / 15 mm or less) that can be peeled open when force is applied. The strong seal portion 4s and the weak seal portion 4w are provided by changing the seal temperature condition. The strong seal portion 4s can obtain the high seal strength by setting the seal temperature to a high temperature seal (for example, 180 ° C. or higher), and the weak seal portion 4w has a seal temperature of a low temperature seal (for example, 160 ° C. or lower). By doing so, the low sealing strength can be obtained.

  The liquid sachet P of the present invention is produced by using, for example, a laminate 10 including at least a base material layer 11 and a heat fusion layer 12 as shown in FIG. Although not shown, the laminate 10 can also include an intermediate layer between the base material layer 11 and the heat sealing layer 12.

  Next, the laminate 10 used in the liquid pouch P of the present invention will be described.

  Since the base material layer 11 of the laminate 10 is a basic material constituting the liquid pouch P, a synthetic resin film having excellent properties in terms of mechanical, physical, chemical, etc. can be used. Films such as polypropylene, polyethylene terephthalate, nylon, polyvinylidene chloride, polyvinyl alcohol, and ethylene / vinyl alcohol copolymer can be used. Or, a film made of polypropylene, polyethylene terephthalate, nylon, or the like, and a barrier resin composition such as polyvinylidene chloride or polyvinyl alcohol is applied to provide a barrier layer, or aluminum, aluminum oxide, silicon oxide, indium oxide, oxidized It is possible to use a material in which an inorganic material such as tin or zirconium oxide is vapor-deposited and a vapor-deposited layer is provided. Further, as these films, usually, the base material layer 11 is often printed, and printability is required. Therefore, a film stretched in a uniaxial direction or a biaxial direction is preferable. In addition, the thickness of the film constituting the base material layer 11 may be a thickness that can be held to the minimum necessary for strength, rigidity, etc. as a basic material, and may be determined in consideration of costs, Usually, it is about 9-50 micrometers.

  The intermediate layer is provided when rigidity, light shielding property, gas barrier property, etc. are further required according to packaging conditions, transportation conditions, contents protection function conditions, and the film used for the base layer 11 described above, A film provided with the aforementioned barrier layer or vapor deposition layer, or a metal foil of aluminum, iron, copper, tin or the like can be used. Moreover, what laminated | stacked the multilayer in combination of 1 or more types of these films etc. may be used.

  The heat-sealing layer 12 is preferably a layer formed from a heat-adhesive resin that can be melted by heat and fused to each other, and can be appropriately selected and used depending on the required quality for the liquid pouch P. , Low density polyethylene, medium density polyethylene, high density polyethylene, linear (linear) low density polyethylene, polypropylene, ethylene-α olefin copolymer, ethylene-propylene copolymer, ethylene-vinyl acetate copolymer, ionomer , Ethylene-acrylic acid copolymer, ethylene-methacrylic acid copolymer, ethylene-acrylic acid ester copolymer, ethylene-methacrylic acid ester copolymer, ethylene / α, β-unsaturated carboxylic acid copolymer, It can be formed using a resin composition in which resins such as ionomers are used alone or in combination of two or more. In particular, a resin composition that can stably obtain low sealing strength by low temperature sealing and high sealing strength by high temperature sealing, such as an ethylene / α, β-unsaturated carboxylic acid copolymer and its ionomer is selected. Selected from Component A, Component B, a propylene homopolymer, and a copolymer of at least one α-olefin excluding propylene and propylene, each having a different melt flow rate as defined in JIS K7210 A resin composition such as C is preferred.

  Moreover, as a method of laminating the base material layer 11, the intermediate layer, and the heat fusion layer 12, for example, a dry lamination method of laminating using a dry laminating adhesive such as a urethane type, or a hot melt extrusion of polyethylene resin or the like. Then, an extrusion lamination method of laminating can be used.

  By using these laminated bodies 10 as the upper member 1a, the upper member 1b, and the lower member 2, and making a bag, the liquid pouch P can be manufactured. An example of the manufacturing method of the wing part 4 will be described. First, the upper member 1a and the upper member 1b are heat-sealed by low-temperature sealing (for example, 160 ° C. or lower) using a heat seal bar over the entire region of the wing part 4. The layers 12 are thermally bonded to form a low seal strength (for example, seal strength of 10 N / 15 mm or less) region, and then a high temperature seal (for example, using a heat seal bar having a predetermined shape in the low seal strength region (for example, , 180 ° C. or higher) to form a strong seal portion 4s having a high seal strength (for example, a seal strength of 20 N / 15 mm or more). That is, the weak seal portion 4w is thermally bonded with a low temperature seal, whereas the strong seal portion 4s is thermally bonded with a low temperature seal and further thermally bonded with a high temperature seal, so the strong seal portion 4s is weakly sealed. A seal strength higher than that of the portion 4w is obtained. The seal temperature condition, the low temperature seal, and the seal temperature of the high temperature seal depend on the type of the heat-adhesive resin used for the heat sealing layer 12, but the low temperature seal is 100 to 160 ° C., and the high temperature seal is 180 ~ 220 ° C. That is, the seal temperatures of the low temperature seal and the high temperature seal satisfy the low temperature seal <the high temperature seal. The manufacturing method of the wing part 4 is an example, and is not limited to this. The sealing method may be formed by using an impulse sealing method depending on the length of the sealing time.

  Next, the present invention will be described in more detail with reference to examples.

[Example 1]
Biaxially stretched polyethylene terephthalate film (PET) having a thickness of 12 μm as the base material layer 11, an easy peel film having a thickness of 50 μm as the thermal fusion layer 12 (trade name: Rock & Peel film manufactured by Mitsui DuPont Polychemical Co., Ltd .: TOK), gravure printing (GR) is performed on one side of the PET, a urethane-based anchor coating agent coating solution is applied to the printed surface, and then dried to provide an anchor coating layer (AC). Low-density polyethylene (PE) in which TOK and TOK are heat-melted is extruded from a T-die at a thickness of 20 μm and laminated by a sandwich lamination method to produce a laminate 10 having a configuration of <PET 12 μm / GR / AC / PE 20 μm / TOK 50 μm>. .

Using the laminate 10, a liquid sachet P (outside dimension: vertical length 130 mm × horizontal length 40 mm) shown in FIG. 1 was prepared. The wing part 4 was heat-sealed on the following heat-sealing conditions using the impulse sealer.
(Heat seal condition)
Sealing time: 0.5 seconds for weak seal 4w
Strong seal 4S is 1.0 second

[Comparative Example 1]
The same liquid pouch as in Example 1 was prepared except that the weak seal portion 4w was not provided.

For the liquid pouches of Example 1 and Comparative Example 1, the tensile strength tester determines the seal strength of the upper edge joint 3u, the lower edge joint 3d, the side edge joints 3l and 3r, and the weak seal 4w and the strong seal 4s. (Made by Shimadzu Corporation). The results are shown in Table 1.
<Measurement conditions>
Tensile speed: 300mm / min Peeling angle: T-shape peeling (90 °)

  Next, the liquid sachets of Example 1 and Comparative Example 1 are filled with water, the liquid sachets are folded in half at the wing portion 4, and fingers are folded from the outer surfaces of the folded upper member 1a and upper member 1b. Pushing water was pressurized in a direction approaching each other, and the unsealing property of the wing part was evaluated by visual observation. What was able to open from a weak seal part was set to (circle), and what was difficult to open was set to x. The results are shown in Table 1.

  In Example 1, as shown in Table 1, the seal strength in the strong seal portion 4s of the peripheral joint portion 3 and the wing portion 4 is 30 N / 15 mm or more, and the seal strength in the weak seal portion 4 w of the wing portion 4 is 10 N / 15 mm or less, satisfying the relationship of the seal strength of the strong seal portion 4s> the seal strength of the weak seal portion 4w, the unsealing property is good, and the water of the contents can be poured out from the weak seal portion 4w. I did not wet my fingers. On the other hand, since the weak seal part 4w was not provided in the wing part 4 in the comparative example 1, the seal strength of the wing part 4 was as strong as 30 N / 15 mm or more, and it was difficult to open from the wing part 4.

P Pouch for liquid O Outlet 1, 1a, 1b Upper member 2 Lower member 3 Peripheral joint 3u Upper edge joint 3d Lower edge joint 3l, 3r Side edge joint 4 Wing 4k Wing base 4f Wing tip 4s Strong seal 4w Weak seal 5 Storage 6 Liquid 10 Laminate 11 Base material layer 12 Thermal fusion layer

Claims (4)

An upper member made of a laminate having an inner surface provided with a heat fusion layer, and a lower member, and a peripheral edge joining portion at the periphery in a state where the heat fusion layer of the upper member and the heat fusion layer of the lower member are opposed to each other A liquid sachet in which a liquid material comprising:
The upper member includes a wing part in which the surfaces of the heat-fusible layer are joined together,
The wing portion is extended outward from a wing base straddling between one opposing edge of the upper member,
A strong seal portion and a weak seal portion are provided in the region of the wing portion,
The liquid sachet is opened from the weak seal part by folding the liquid sachet in two with the wing base part of the wing part as an axis. The liquid sachet according to claim 1, wherein the liquid sachet is vertically long, and the wing portion is arranged at a position approximately half the length of the long side. 3. The liquid pouch according to claim 1, wherein the weak seal portion is disposed at a substantially center between one opposing end edges of the upper member of the wing portion. 4. The liquid pouch according to claim 1, wherein the weak seal portion has a tapered shape outwardly from the wing base portion. 5.

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