JP2020093818A - Pouch - Google Patents

Abstract

To obtain a pouch which can be held firmly and torn apart even with wet hands and has a spouting part to be opened by being torn apart, and which can be manufactured on a normal production line.SOLUTION: A pouch (1) is made of overlapped lamination films, with, along a periphery thereof, an upper side part (11), a left side part (12), a right side part (13) and a bottom side part (14) sealed or folded to be closed; and formed with a storage part inside. The pouch comprises: at an intersection of the adjacent sides a spout part(2) which is formed with a spouting end seal part (15) that extends obliquely upward in a projecting shape and a spouting path (20) of a non-fusing part surrounded by the out-pouring end seal part, and which can be opened by cutting off of a knob part (22) at the tip of the spout end; and a non-slip layer containing resin-based elastomer on the surface of the spout part.SELECTED DRAWING: Figure 1

Description

INDUSTRIAL APPLICABILITY The present invention is a packaging bag for storing toiletries such as liquid detergents and softeners, foods such as cooking oil, sauces, instant coffee, etc., especially in refilling, etc. without using tools such as scissors and a cutter. It relates to a pouch that can be opened.

As containers for storing toiletry products such as liquid detergents and softeners, and foods such as cooking oil and instant coffee, dedicated containers having easy-to-use shapes such as plastic bottles and glass bottles are used. Since these special containers have a solid structure and are therefore expensive, they can be repeatedly used when the contents are exhausted. Refilling pouches for refilling the contents of such exclusive containers are sold separately.

For example, as a refilling pouch that stores fluid contents such as liquid, it is easy and safe to refill the contents into a dedicated container, and at the same time, it is cheap and the empty bag is not bulky and used. It is desirable to be able to easily dispose of it later, and from this point, a pouch with a spout part is often used in which a spout part with a narrow width is provided by heat sealing at a part of the upper part of the bag. ..

Such a pouch for refilling is made of a tough material in order to increase the drop strength, and therefore, in order to open the small spout, at first, it was impossible to open it without using scissors. However, it is troublesome to prepare tools such as scissors, and the contents are likely to adhere to the scissors, causing problems such as rust and difficulty in cutting. Therefore, a pouch has been developed in which notches or notches are provided at both ends of a narrow pouring portion, or easy-open lines are provided at both left and right ends.
Even so, tearing the root of the spout requires a strong force and requires a firm grasp, but there were problems such as slipping and not being able to exert force.

Therefore, in Patent Document 1,
A flexible packaging bag formed of a plastic film material, wherein a spout is formed by cutting a cut portion along a cutting instruction line,
At least, there is proposed a flexible packaging bag characterized in that a non-slip layer is provided on the surface of the cut portion of the flexible packaging bag at the picking portion.

This anti-slip layer is coated with a coating liquid or ink containing a mat material and a binder as main components to prevent slipping and to firmly grasp and tear. However, when trying to grab when the hand is wet, it was slippery and could not be said to be a sufficient countermeasure.

In Patent Document 2,
A packaging container comprising at least one layer of resin film, which is hermetically sealed after being filled with contents,
The pouring part for pouring the filled contents to the outside is provided via a breakable part that can be opened with fingers, and in a packaging container having a pick part at least on the tip side of the breakable part,
There is proposed a packaging container characterized in that at least one surface of the knob portion is formed with anti-slip fingers.

This knob part is a non-slip layer that is also used with unevenness, or it is applied by coating with ultraviolet curing ink, but it is difficult to position the coating of unevenness, and the ultraviolet curing device is lined up. However, there is a problem in that it is expensive to change the manufacturing line and the cost is high.

JP, 2005-96778, A Utility Model No. 3139720

Therefore, the present invention is to obtain a pouch that has a pouring portion for tearing and opening, which can be gripped and torn firmly even when the hand is wet, and which can be manufactured in a normal production line. Is.

The pouch of the present invention is a pouch in which laminated films are superposed, and a peripheral upper side portion, a left side portion, a right side portion, and a bottom side portion are sealed or folded and closed to form a storage portion inside,
At the intersection of the adjacent side portions, a pouring end seal portion extending obliquely upward in a projection shape, and a pouring path of a non-fusing portion surrounded by the pouring end seal portion are formed. Has a pouring part that can be opened by cutting off the knob part at the tip,
A pouch having a non-slip layer containing a resin-based elastomer on the surface of the pouring portion.

Since the pouch of the present invention has the non-slip layer containing a resin elastomer as a main component, it can be strongly torn without slipping even when picked by a wet hand.
Further, since it does not require an ultraviolet curing device or the like and does not require highly accurate positioning, it can be manufactured by a normal manufacturing line.

It is the whole figure which shows an example of the pouch which concerns on this invention, and the enlarged view of the spout vicinity. It is a figure which shows the process of opening the spout of the pouch which concerns on this invention. It is a schematic diagram of the film which comprises the pouch which concerns on this invention. It is a figure which shows the shape of the pouch used in an Example and a comparative example.

Hereinafter, an embodiment of a pouch of the present invention will be described with reference to the drawings.
FIG. 1 is an overall view showing an example of the pouch according to the present invention and an enlarged view of the vicinity of the spout.
The pouch 1 of the present invention is a pouch in which a front film 101 and a rear film 102 made of a laminated film are superposed on each other on their back surfaces, and an upper side portion 11, a left side portion 12, a right side portion 13, and a bottom side portion 14 are provided around the inside thereof. A storage unit 10 for storing contents is provided.
An example of the pouch shown in FIG. 1 is a standing pouch in which a bottom portion is fused with a bottom film 141, which is a pouch having self-supporting property.

This pouch has a pouring end seal portion 15 extending obliquely upward in a protruding shape at the intersection of either the left side portion 12 or the right side portion 13 and the upper side portion 11. It has a part 2. In FIG. 1, the pouring portion 2 is provided at the intersection of the left side portion 12 and the upper side portion 11.
The spout 2 is formed from a spouted end seal portion 15 having a tapered outer shape, a side edge cutout 121, an upper edge cutout 111, and a spout 20 of a non-fusing portion surrounded by these. Further, it has an opening portion 21 that can be easily broken and opened.

As shown in the enlarged view of FIG. 1, the unsealing portion 21 has a side cutout 121 through a sharp cutout 1110 of the upper cutout 111 through a pouring path 20 in which the front and back films are not fused. It is formed by the easy-opening process line 210 which can be connected to the opening and can form a spout. Therefore, the easy-open processing line 210 can expose the pouring path 20 and pouring out the contents when the opening part 21 is broken and removed.

The front film 101 and the rear film 102 used in the pouch of the present invention are composed of a base material layer 103 and an inner sealant layer 104 as shown in FIG.
As shown in FIG. 3-2, the easy-open processing line 210 scans the laser beam linearly to linearly remove the base material layer to make it thin, or completely to make the base material layer linear. And is supported by the sealant layer. Therefore, if the both sides of the easy-open processing line 210 are forcibly pulled, the weakened line is only the sealant layer having low strength, and thus the line can be easily torn.
It is possible to form the easy-open processing line 210 by half blanking with a sharp blade, but since it cannot be processed stably, it is preferable to form a weak line that can be partially broken by scanning with laser light.
As the laser light to be processed, a gas laser such as a carbon dioxide gas laser or a nitrogen laser, or a solid laser such as a ruby laser or a YAG laser can be used. Lasers are preferred.

As described above, the easy-open processing line 210 is processed from the sharp notch 1110 of the upper side notch 111 to the side notch 121 through the pouring path 20 where the front and back films are not fused. The processing line can be broken even with one processing line, but it is preferable to form the easy-open processing line by a plurality of parallel weak lines between the pouring side and the storage section side.
In the case of carbon dioxide gas laser light, the scanning line is not smooth, so if the easy-opening process line is formed by a plurality of parallel weak lines, even if the tear is shifted to the left or right, the next easy-opening process line will be used. It can be torn and opened without fail, and a large tear can be prevented from shifting.

Further, the easy-open processing line 210 is a processing line formed by a weak line of a straight line or a curved line where the front film 101 and the rear film 102 are cut out at the non-fused portion, and does not have a portion bent at an acute angle. Preferably.
As a matter of course, it is preferable to process the weakened line at the same position on the front and back.

The upper side notch 111, the side side notch 121, or the entire outer shape provided at both ends of the easy-open processing line 210 can be punched with a Thomson blade, press punched with a die, or pressed with a deep blade. is there. A part of the outer shape may simply be cut off in a separate process.

FIG. 2 is a diagram showing a process of opening and pouring out the pouch according to the present invention.
FIG. 2-1 shows a process of opening the spout 2.
The unsealing portion 21 is formed from the spouting end seal portion 15 having a tapered outer shape, the fusion splicing portion surrounded by a part of the side side cutout 121 or the upper side cutout 111, or the tip end side of the pouring path 20, and the pouch. It is connected to the storage part side by an easy-open processing line 210 made of a weak line. The unsealing portion 21 is a knob portion 22 that is gripped by hand when the unsealing is performed and is torn and opened.

On the surface of the knob portion 22, a non-slip layer 105 containing a resin elastomer as a main component is provided.
This resin-based elastomer includes acrylic elastomer, styrene-based elastomer, olefin-based elastomer, urethane-based elastomer, ester-based elastomer, amide-based elastomer, vinyl chloride-based elastomer, and the like. There are resin-based elastomers and thermosetting resin-based elastomers such as silicone rubber, fluororubber and urethane rubber, and acrylic block polymers which are acrylic-based elastomers are particularly preferable.
The acrylic block polymer is an acrylic block polymer composed of methyl methacrylate and normal butyl acrylate, can be produced by living anion polymerization, and has adhesiveness to the polymer itself.
For this reason, even if the hand is slightly wet, it is difficult to slip, and the grip portion can be firmly pinched to ensure reliable tearing.
The anti-slip layer 105 applied to the outer surfaces of the front film 101 and the rear film 102 may be only the cut-out range, but may be further penetrated into the storage section 10 side and applied. In some cases, the entire surface of the pouch may be coated.

In FIGS. 2A and 2B, the upper side cutout 111 has a sharp cutout portion 1110 with sharp corners, and the sharp cutout portion 1110 and the easy-open line 210 cause the knob portion 22 to move against the pouch. Once the tearing is started by pulling it to the front side or the back side, it is easily torn toward the side cutout 121.
Then, when the knob portion 22 separates from the pouch, the spout 20 is opened at the opening portion 21.

In order to make it possible to open the pouring portion 2 by cutting off the knob portion 22 at the tip of the pouring end, if the knob portion surface is a rough surface on which uneven shapes are formed together with the anti-slip layer, the knob portion can be gripped more reliably. The opening portion 21 can be torn with. There is a method of pressing and embossing the unevenness, but a method of printing an ink to which a core material such as calcium carbonate is added, or printing by embossing may be used as a base for coating the elastomer.

The pouch of the present invention can be used not only for the standing type (self-supporting type) pouch as shown in FIG. 1 but also for the three-sided seal type and the four-sided seal type pouches, etc., depending on the usage pattern, the capacity of the contents, and the design. is there.

The basic configuration of the laminated film constituting the pouch of the present invention may be a film comprising a base material layer on the outside and a sealant layer on the inside, but as a middle layer, a barrier layer for improving the storage stability of the contents or It is preferable to provide a layer that imparts flexibility such that the bag is not easily broken when dropped.

Examples of the base material layer include polyethylene terephthalate film, polypropylene film, polystyrene film, nylon film, polycarbonate film, polyacrylonitrile film, and polyimide film. There is no particular limitation as long as it has mechanical strength and dimensional stability. A film obtained by biaxially stretching a crystalline resin is particularly preferable. In addition, these films may be provided with an aluminum vapor deposition layer.

Further, the base material layer may be provided with a printing layer as needed. The printed layer is a layer printed with an ink obtained by adding various pigments, extender pigments and plasticizers, desiccants, stabilizers, etc. to a binder resin such as urethane type, acrylic type, nitrocellulose type and rubber type. As the printing method, for example, known printing methods such as offset printing, gravure printing, flexo printing, silk screen printing, inkjet printing and the like can be used. Further, the surface of the base material layer may be previously subjected to corona treatment or ozone treatment as a pretreatment to improve the adhesion of the printed layer.

As the sealant layer, a polyolefin resin is generally used, and specifically, low density polyethylene, linear low density polyethylene, medium density polyethylene, high density polyethylene, ethylene-vinyl acetate copolymer (EVA), Polyolefin resins such as ethylene-methacrylic acid copolymer (EMAA), ethylene-ethyl acrylate copolymer (EAA), ionomer and polypropylene can be used. It is possible to form a film of these resins by an extruder. It may be a single layer or multiple layers. The thickness of the film is preferably in the range of 50 to 200 μm.

An adhesive for dry lamination can be used as the adhesive layer. For example, a two-component curing type urethane adhesive, a polyester urethane adhesive, a polyether urethane adhesive, an acrylic adhesive, a polyester adhesive, a polyamide adhesive, an epoxy adhesive, etc. can be used. .. The laminating method may be a dry laminating method, but the laminating may be performed while forming the sealant layer side by extruder lamination, or may be processed by sand polyethylene.

In addition, if it is necessary to improve various properties of the laminated sheet, for example, in the case of improving rigidity, drop strength, puncture strength, etc. of the laminated sheet, in case of improving barrier property against water vapor or oxygen gas, etc. It is also possible to provide layers. However, it is desirable to use a material that can be easily weakened or easily broken by processing the easy-open processing line.

As the intermediate layer, for example, aluminum foil, aluminum vapor-deposited polyester film, inorganic oxide vapor-deposited polyester film, polyamide resin, or the like can be used. Further, in order to laminate the intermediate layer, it is possible to attach the intermediate layer by a dry laminating method via an adhesive layer.

As the inorganic oxide, metal oxides such as silicon oxide, aluminum oxide, magnesium oxide, calcium oxide, potassium oxide, tin oxide, sodium oxide, boron oxide, titanium oxide, lead oxide, zirconium oxide and yttrium oxide can be used. .. Among them, silicon oxide, aluminum oxide, magnesium oxide and the like are preferable in terms of productivity and price.

Hereinafter, specific examples and comparative examples of the present invention will be described.
In each of the Examples and Comparative Examples, a laminated film used as a front film, a rear film, and a bottom intermediate film forming a pouch was manufactured by using a two-component curing type biaxially stretched 6-nylon film 15 μm on the inner surface as a base material layer. A two-layer structure in which 12 μm of a polyethylene terephthalate film vapor-deposited with silicon oxide was adhered by a dry lamination method via a urethane adhesive was used.
Further, a linear low-density polyethylene film 120 μm was stuck on the inner surface as a sealant layer to prepare a laminated film.

The front film 101, the rear film 102, and the bottom intermediate film 141 of the pouch are a laminated film having a length of 384 mm and a width of 160 mm, which is folded in the lengthwise direction so that the sealant surfaces are aligned with each other, and the length (H) is 160 mm and the width (W is W). ) The film was folded to have a size of 160 mm, and the end portion was used as a bottom intermediate film, and a film having a depth h of 16 mm was used by folding the sealant surface outward between the front film and the rear film. (Reference: Figure 4-1)
The shapes of the spout portion and the knob portion are the same in all Examples and Comparative Examples in FIG. 4-2.
The easy-open processing line 210 is processed by scanning a carbon dioxide gas laser having a wavelength of 10.6 μm with an output of 21 watts at a speed of 2500 mm/sec into the planned easy-open line shape of FIG. did.

For the knob portion 22, both the front film 101 and the rear film 102 were coated with the coating agent at the same positions shown in FIG. 4-2.
The coating agent to be applied was an acrylic block polymer, and a coating liquid dissolved in ethyl acetate as a solvent was used.
The amount of addition to the coating liquid was changed and evaluated.
Comparative Example 1 is uncoated,
Example 1 is 1.0 part by weight to 99 parts by weight of ethyl acetate,
In Example 2, 3.0 parts by weight, relative to 97 parts by weight of ethyl acetate,
In Example 3, 15.0 parts by weight with respect to 85 parts by weight of ethyl acetate,
Example 4 is 35.0 parts by weight with respect to 65 parts by weight of ethyl acetate,
Comparative Example 2 was 50.0 parts by weight with respect to 50 parts by weight of ethyl acetate,
Using a solid gravure plate having 175 lines/inch and a plate depth of 25 μm, gravure coating was performed, and the film was cut into a length of 200 mm and a width of 80 mm for evaluation.

<Evaluation method>
<Measurement of slipperiness of knob>
The static friction coefficient was measured in accordance with the JIS K 7125 plastic-film and sheet-friction coefficient test method, and it was used as the slipperiness.
Measuring instrument: Tensilon (R) universal testing machine (tensile/compression testing machine) RTF-2410 manufactured by A&D Co., Ltd. is used.
Relative speed of sliding piece to friction table: 100 mm/min
Mass of sliding piece: 200g (using weight sliding piece with felt surface)
Test piece: A laminated film having a length of 200 mm and a width of 80 mm was used, and three sets of test pieces were formed by coating the above various coating agents on the entire surface.
The slipperiness was evaluated in two ways: one with no water on the coated surface and one with 1 g of water applied to the coated surface, and the results were averaged three times.

<Evaluation of cut property of unsealed part>
With the hand wet with water, the pouch filled with 130 mL of water and the knob portion were held, and the opening portion was torn to evaluate the tearability.
Five males and five females were evaluated by 10 persons, and the number of persons who felt difficult to cut from a practical viewpoint or did not cut at all was used as the evaluation point.

<Evaluation of suitability for bag making>
The laminated film was hung on the bag-making machine and it was confirmed whether or not stable bag-making was possible.

<Evaluation result>
<Results of measuring the slipperiness of the knob>
The result of measuring the static friction coefficient without adding water to the sliding piece and the knob was 0.21 in Comparative Example 1, 0.32 in Example 1, 0.41 in Example 2, and 3 in Example 3. It was 0.53, 0.91 in Example 4, and 1.42 in Comparative Example 2.
Next, as a result of measuring the static friction coefficient by adding 1 g of water to the sliding piece and the knob portion, the static friction coefficient was 0.13 in Comparative Example 1, which was a large decrease, but 0.35 in Example 1 and 0. 45, Example 3 was 0.54, Example 4 was 0.95, and Comparative Example 2 was 1.45, which was equivalent to that without water or slightly increased.

<Cutability evaluation result of the open part>
In Comparative Example 1, 7 out of 10 people slipped and were not torn. However, in Example 1, Example 2, Example 3, Example 4, and Comparative Example 2 in which the acrylic block polymer was applied, it was possible to reliably tear and open without slipping at the knob portion.

<Evaluation of suitability for bag making>
In Comparative Example 1, Example 1, Example 2, Example 3, and Example 4, a bag was formed in the same manner as a general film, but in Comparative Example 2, wrinkles were formed due to poor slippage during the bending process. The film was misaligned, making it difficult to make bags.

From the above results, the one coated with the acrylic block polymer can be surely grasped and torn by the knob portion to be opened, and the addition amount to be coated is 1.0% or more and 40.0% or less. I confirmed that it was good.

The pouch of the present invention is as described above, and by adding a non-slip layer containing a resin-based elastomer as a main component to the knob portion, it is possible to tear it strongly without slipping even if it is picked up with a hand wet with water Is.
Further, since the resin-based elastomer is simply applied in the printing process, it can be manufactured by a general-purpose manufacturing line. In particular, there is a great merit that it can be manufactured without requiring an ultraviolet curing device or the like and without requiring highly accurate positioning.

1---Pouch 10---Storage part 101---Front film 102-Rear film 103-Base material layer 104・・・Sealant layer 105 ・・・Slip resistant layer 11 ・・・・Upper side 111 ・・・・Upper side notch 1110 ・・・・・Sharp notch 12・・・・・Left side 121・・・・Side cutout 13・・・・Right side 14・・・・Bottom 141 ・・・・・・Bottom film 15・・・・・・Spout end seal part 2 ・・・・・・Spout part 20 ・・・・Spout path 21 ・・・・Opening part 210 ・・・Easy opening Processing line 22...Knob H... Vertical W... Horizontal width h... Folding height

Claims (6)

A pouch in which laminated films are superposed, and a surrounding upper side portion, a left side portion, a right side portion, and a bottom side portion are sealed or folded and closed to form a storage portion inside,
At the intersection of the adjacent side portions, a pouring end seal portion extending obliquely upward in a projection shape, and a pouring path of a non-fusing portion surrounded by the pouring end seal portion are formed. Has a pouring part that can be opened by cutting off the knob part at the tip,
A pouch having a non-slip layer containing a resin elastomer on the surface of the knob portion. The pouch according to claim 1, wherein the resin-based elastomer of the anti-slip layer is an acrylic elastomer, and the weight ratio added is 1.0% or more and 40.0% or less. The pouch according to claim 1 or 2, wherein the surface of the knob portion is a pouring portion formed of a rough surface having an uneven shape. The pouch according to any one of claims 1 to 3, wherein the opening portion at the base of the knob portion has an easily opened processing line. The pouch according to claim 4, wherein the easy-open processing line is a scanning line formed by a carbon dioxide gas laser. The pouch according to claim 4 or 5, wherein the easy-open processing line is composed of a plurality of parallel weak lines.

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