JP2017222406A - Plastic bag - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an easily openable plastic bag in which a content does not spill nor adhere to hands when shuffling the content to the other container.SOLUTION: An objective plastic bag comprises a plastic film or a laminate formed using the plastic film as a base material and is a content-shuffling rectangular plastic bag whose peripheral edge is heat-sealed. An upward U-shaped or V-shaped notch is provided on the lower side center of rectangle, and the peripheral edge of the notch is heat-sealed. Further, a notch smaller than a heat seal width is provided to either one of right and left of the heat seal part in the peripheral edge of the notch, and the portion surrounded by another one thereof, a peripheral edge facing that and the rectangular lower side are heat-sealed.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a plastic bag. In particular, liquid or gel-like semi-solid contents are sealed and packaged, opened with fingers, transferred to other containers, mixed with other chemicals, and the contents adhere to the fingers. The present invention relates to a plastic bag that can be easily performed without any problems.

  Conventionally, so-called plastic bags made of a plastic film or a laminate made of a plastic film as a base material have been widely used in various applications and have become indispensable for modern life and industry.

  Even in daily life, it is widely used in processed foods, various beverages, medicines, toiletries, etc., and its specifications are selected from various materials according to the required quality, and the quality is carefully designed.

  Packaging bags based on plastic films have a number of advantages over other packaging containers. For example, compared to a bottle, it is light and difficult to break, and the cost is low, and it is easy to give information and beautiful printing so that it can be seen from the outside.

  Or, compared with a can, there are advantages such as a high degree of freedom in shape and easy opening. In addition, it has superior water resistance and superior durability compared to paper containers.

  In recent years, environmentally conscious products such as sorting and recycling are often demanded due to increasing environmental awareness. In this case, the conversion to plastic bags is one solution compared to the case where aluminum or the like is used as the packaging container.

  However, on the other hand, due to the flexibility of the plastic film, the packaging bag may be difficult to stand on its own and may be difficult to open. In particular, in the case of liquid contents that require transfer to another container, it is difficult to hold or the contents adhere to the hand when opening or transferring upside down. And spills often occur.

  Depending on the contents, it may adhere to the hand and damage or stain the skin, and the attached dirt may be difficult to remove. In addition, the spillage may cause a change in the blending ratio, which may be extremely inconvenient.

  To prevent adhesion to fingers, wearing gloves is a quick method, but using gloves is not easy to work with and may cause spills. I have to think about it. In particular, in the case of gloves that do not fit in size, they may slip and may be dangerous.

  Patent Document 1 proposes a packaging bag that is used as a hair cosmetic set in which one of two types of drugs is transferred to the other container and mixed, but the packaging bag is difficult to hold or contents. Was not considered to adhere to the hand or spill.

Republished patent WO2013 / 136491

  The present invention has been made in view of such a situation, and provides a plastic bag that is easy to open and does not spill contents or adhere to hands when transferred to another container. Is an issue.

As means for solving the above-mentioned problems, the invention described in claim 1 is a plastic film or a laminate made of a plastic film as a base material, and the contents are transferred by heat sealing the periphery. A rectangular plastic bag for replacement,
At the center of the lower side of the rectangle, a notch is provided in a U-shaped or V-shaped shape toward the upper side, and the periphery of the notch is heat-sealed.
The left or right side of the heat seal part at the periphery of the notch is provided with a notch smaller than the heat seal width,
The plastic bag is characterized in that the other part of the heat seal part at the periphery of the notch, the peripheral edge opposite to the heat seal part, and the part surrounded by the lower side of the rectangle are heat sealed.

  The invention according to claim 2 is characterized in that the opening formed by cutting from the notch to the opposite peripheral edge is smaller than the opening of the container to which the contents are transferred. Is a plastic bag.

  According to a third aspect of the present invention, in the plastic bag according to the first or second aspect, the rectangular plastic bag has longer left and right sides than the upper and lower sides of the rectangle. It is a bag.

  According to the present invention, it is possible to provide a plastic bag that can be easily opened and that does not spill contents or adhere to hands when transferred to another container. That is, the opening can be made by easily opening the plastic bag with the notch as a trigger.

  Also, one of the U-shaped or V-shaped notch heat seal parts, the peripheral edge opposite to it, and the heat seal part surrounded by the upper side of the rectangle are rigid, so they are supported and transferred by hand. Can be done.

  Further, when transferring, a U-shaped or V-shaped cut can be applied to the end face of the mouth of the transfer destination container, and the plastic bag according to the present invention can be stabilized.

  In particular, according to the second aspect of the present invention, opening is easy, and when transferring to another container, the contents are spilled because the opening is smaller than the opening of the destination container. It is possible to provide a plastic bag that does not stick to the hand.

  When the opening of the transfer destination container is larger than the opening of the plastic bag according to the present invention, the opening of the plastic bag is inserted into the opening of the transfer destination container and at the same time, the U-shaped This is because the notch can be supported by the end face of the mouth of the transfer destination container, and the transfer operation can be performed more stably.

In particular, according to the third aspect of the present invention, it is possible to provide a plastic bag that is easy to open and that does not spill contents or adhere to the hand when transferred to another container. Is possible. In this transfer, the rectangular plastic bag has a longer left and right side than the upper and lower sides of the rectangle. This makes it easier to work.

  In addition, the rectangular plastic bag has longer left and right sides than the upper and lower sides of the rectangle, that is, the vertically long shape means that the plastic bag can be used with the fingers of both left and right hands when transferring contents. Can be easily held and supported, and is effective in performing stable transfer work.

FIG. 1 is a schematic plan view for explaining one embodiment of a plastic bag according to the present invention. FIG. 2 is a schematic perspective view for explaining the state of transferring the contents of the plastic bag according to the present invention. FIG. 3 is a partial cross-sectional schematic view for explaining one embodiment of a laminate constituting the plastic bag according to the present invention.

  Hereinafter, the present invention will be described in more detail with reference to the drawings. However, the present invention is not limited to the examples shown here. The invention is limited only by the following claims.

  FIG. 1 is a schematic plan view for explaining one embodiment of a plastic bag according to the present invention. The plastic bag (10) is made of a plastic film or a laminate having a plastic film as a base material, and is manufactured by heat-sealing the periphery.

  In the plastic bag (10) according to the present invention, the heat seal includes a heat seal (1) at the periphery, a U-shaped heat seal (2) provided at the periphery of the U-shaped notch (5), A heat seal (3) surrounded on three sides by one of the U-shaped heat seals (2), a peripheral edge facing the heat seal (2), and a lower side (4) of the rectangle. Note that the notch (5) may be V-shaped, for example.

  The heat seal (1) at the peripheral edge is a heat seal for making the plastic bag (10), and the upper part of the rectangular plastic bag is the content as a filling port after heat sealing of the other part. Then, the upper part of the rectangular plastic bag is heat sealed to seal the plastic bag (10).

  The U-shaped heat seal (2) is provided at the periphery of the U-shaped notch (5). In addition, a notch (6) smaller than the width of the U-shaped heat seal (2) is provided on either the left or right side of the U-shaped heat seal (2), and this notch (6) is used as a trigger. By opening the plastic bag (10) with fingers, an opening can be made in the plastic bag (10). The heat seal (2) may be a V-shaped heat seal along the periphery when the notch (5) is V-shaped, for example.

  The notch (6) makes the opening of the plastic bag (10) easier. The formation of the notch (6) and the U-shaped notch (5) is not particularly limited, but can be formed by using, for example, a punching die.

The other part of the U-shaped heat seal (2) that is not provided with the notch (6), and the rectangular periphery that opposes it, and the region surrounded by the lower side (4) of the rectangle are surrounded on three sides. Seal (3). When this portion has a heat seal having a certain area, the plastic bag (10) can be gripped and fixed with fingers when the contents are taken out from the plastic bag (10).

  FIG. 2 is a schematic perspective view for explaining the state of transferring the contents of the plastic bag according to the present invention. The plastic bag (10) according to the present invention is a rectangular container for transferring its contents (11) to another container (8).

  The plastic bag (10), which has been cut by the fingers and provided with the opening (7), puts the opening (7) inside the opening (9) of another container, and has a U-shaped notch ( 5) straddles the edge of the opening (9) of the other container (8), that is, the end face (12) of the mouth, and the heat seal (3) surrounded by the three sides is the opening of the other container (8). The contents (11) can be transferred by being fixed so as to be located outside (9).

  At this time, the plastic bag (10) can be fixed by holding the heat seal (3) surrounded by the three sides with fingers. Thereby, the transfer operation of the contents (11) can be performed more easily and stably.

  Therefore, in the transfer, it is possible to prevent problems such as the contents (11) spilling out, and it is also possible to prevent the fingers from getting dirty.

  At this time, the opening (7) that can be cut from the notch (6) to the opposite peripheral edge is smaller than the opening (9) of the other container (8) to which the contents (11) are transferred. The opening (7) can be inserted into the opening (9) of another container, and the plastic bag (10) can be fixed in a more stable position.

  That is, when the transfer destination container is determined, the opening (7) of the plastic bag (10) according to the present invention is inserted into the opening (9) of another transfer destination, and at the same time, U The character-shaped notch (5) can be supported by the end face (12) of the mouth of the other container (8) to which the transfer is performed, and the transfer operation can be performed more easily and stably. This is because it becomes possible.

  Therefore, according to the plastic bag of the present invention, it is possible to prevent problems such as spilling out of the contents (11) in the work of transferring the contents (11), and to soil the fingers. Can be prevented.

  Further, the plastic bag (10) according to the present invention has the above-mentioned advantages, but as a result, it is not necessary to use gloves or the like, and the transfer workability is also improved in this respect. In addition, it is advantageous in terms of cost that a finger protection glove used for transfer work at the time of commercialization is unnecessary.

  Further, it is not necessary to use a member such as a spout for squeezing, and this can also contribute to cost reduction.

  In addition, the plastic bag (10) according to the present invention is cheaper than conventional tubes containing an aluminum layer, etc., and is superior in terms of safety, such as preventing the hand from being cut, and can be easily disposed of separately. The environmental load can be reduced.

The plastic bag according to the present invention is almost the same as the conventional tube containing an aluminum layer in terms of refilling. Therefore, even when the plastic bag is changed to a plastic bag, it is easy to accept from the consumer's standpoint. ing.

  Furthermore, the plastic bag according to the present invention is suitable for filling and transferring a small amount of contents, can be used as a so-called sachet, and can be commercialized in many applications.

  Hereinafter, the plastic bag according to the present invention will be described in more detail and specifically. An object of the present invention is to provide a plastic bag that is easy to open and does not spill contents or adhere to hands when transferred to another container (8).

  The heat seal (3) surrounded on three sides can be formed simultaneously with the peripheral heat seal (1) and the heat seal of the U-shaped heat seal (2). In addition, this portion has a characteristic that it is easy to grip with fingers because this portion is superior in rigidity as compared with other portions not subjected to heat sealing of the body portion by heat sealing.

  Therefore, when transferring the contents (11), hold the heat seal (3) surrounded on three sides with one hand and hold the peripheral heat seal on the opposite side of the plastic bag with the other finger. Thus, the plastic bag can be supported more easily and stably.

  With this support method, even when squeezing out semi-solid contents, the contents can be taken out from the top to the bottom with fingers, making the transfer work easier and more stable. It is possible.

  Thus, the transfer operation can be performed more easily and stably. Therefore, it is possible to provide the plastic bag (10) in which the contents (11) are not spilled or adhered to the hand when transferred to another container (8).

  Further, since the U-shaped heat seal (2) is provided on the peripheral edge of the U-shaped notch (5), this portion is the edge of the opening of the other container (8) to which the transfer is made, that is, It is possible to fix across the end face (12) of the mouth. Accordingly, it is possible to provide the plastic bag (10) in which the contents (11) are not spilled or adhered to the hand when transferred to another container (8).

  As described above, the plastic bag according to the present invention is easy to open and has features such that the contents do not spill or adhere to the hand when transferred to another container. Can be used.

  For example, hair dyes are stored stably and mixed with a fixed amount of drug just before use. However, the plastic bag according to the present invention can be easily opened and transferred to another container. In this case, the contents are not spilled or attached to the hand, and can be transferred easily and stably. In addition, even when the contents have a gel-like semi-solid or thixotropic flow characteristics, it is preferable because it can be easily and stably transferred.

  The present invention relates to a plastic bag, and includes a plastic film or a laminate having a plastic film as a base material. FIG. 3 is a partial schematic cross-sectional view for explaining one embodiment of the laminate (20) constituting the plastic bag according to the present invention. Each component will be individually described with reference to FIG.

(Plastic film base layer)
The plastic film base layer (15) is a film made of a polymer resin composition, for example, polyolefin (polyethylene, polypropylene, etc.), polyester (polyethylene terephthalate, polybutylene terephthalate, polyethylene naphthalate, etc.), polyamide (nylon-6) , Nylon-66, etc.), polyimide, and the like can be used and are appropriately selected depending on the application. Particularly when polypropylene or polyethylene terephthalate is used as the plastic film base layer (15), it is more preferable in terms of film strength and price.

(Sealant layer)
In order to make a plastic bag, the peripheral portion and the like are bonded by heat sealing. For that purpose, the sealant layer (16) is disposed on at least one surface of the laminate, and the two laminates are stacked so that the sealant layers (16) face each other, and heated and pressurized to heat-seal each other. Can be made to make bags. However, when the plastic bag is made of a single layer of plastic film, a plastic film having heat sealability is selected.

  As a material for the sealant layer (16), a polyolefin-based resin is generally used among thermoplastic resins, and specifically, a low density polyethylene resin (LDPE), a medium density polyethylene resin (MDPE), a linear low Ethylene resins such as density polyethylene resin (LLDPE), ethylene-vinyl acetate copolymer (EVA), ethylene-α olefin copolymer, ethylene-methacrylic acid resin copolymer, blend resin of polyethylene and polybutene, Polypropylene resins such as homopolypropylene resin (PP), propylene-ethylene random copolymer, propylene-ethylene block copolymer, and propylene-α-olefin copolymer can be used.

  For the formation of the sealant layer (16), a molten resin can be formed using an extruder or the like to form a layer on the laminate (20). Alternatively, it is possible to form the sealant layer (16) on the inner surface of the plastic bag of the laminate (20) by laminating materials previously formed into a film state by lamination.

  In this case, for example, an adhesive layer (14) can be provided between the plastic film base layer (15) and the sealant layer (16). For this adhesion, each layer of the laminate can be adhered and laminated by, for example, a dry coating method.

  The sealant layer (16) is bonded by applying heat and pressure, and when the laminate (20) is made into a plastic bag, the sealant layers (16) are opposed to each other, It can be made into a plastic bag by heat sealing. Accordingly, the sealant layer becomes the inner surface of the plastic bag.

(Gas barrier layer)
For the purpose of improving the storage stability of the contents, an opaque layer that shields ultraviolet rays, such as a colored film, can be provided in the laminate (20) if necessary. Or a gas barrier layer (22) can be provided in a laminated body (20).

  As the gas barrier layer (22), a gas barrier film (13) obtained by providing a gas barrier layer (22) of an inorganic compound on the surface of the plastic film (21) can also be used. As the gas barrier layer (22), a metal film such as aluminum deposited on the surface of the plastic film (21) or a metal foil such as aluminum foil can be disposed in the laminate.

  However, for example, when aluminum foil is used, there is difficulty in restoring the shape when external force is applied, and there are concerns about safety issues such as cutting the aluminum foil part during work, and separation. It is difficult to use because it is difficult to dispose of it. In such a case, a gas barrier film (13) in which a gas barrier layer (22) is provided on the surface of the plastic film (21) can be used instead.

  In the case of the gas barrier film (13), the gas barrier layer (22) can be composed of a vapor deposition layer and a coating layer of an inorganic compound. After the anchor coat is provided on the plastic film (21), the vapor deposition layer and the coating layer are sequentially provided. .

  For example, urethane acrylate can be used for the anchor coat layer of the gas barrier film (13). For the formation of the anchor coat layer, a coating method using a printing technique such as gravure coating with a paint in which a resin is dissolved in a solvent can be used, and a coating film can be formed using a generally known coating method.

  As a method of forming a vapor deposition layer, an inorganic compound such as SiO or AlO is coated on a base film provided with an anchor coat layer using a vacuum vapor deposition method, and an inorganic compound layer is formed by a vacuum vapor deposition method. it can. The thickness of the vapor deposition layer is preferably 15 nm to 30 nm.

  As a method for forming the coating layer, an aqueous solution or water / alcohol containing at least one of a water-soluble polymer and (a) one or more alkoxides or hydrolysates thereof, or (b) tin chloride. A coating agent mainly composed of a mixed aqueous solution is applied onto a film and dried by heating to form an inorganic compound layer by a coating method to form a coating layer. At this time, the adhesion with the anchor coat layer can be improved by adding a silane monomer to the coating agent.

  The inorganic compound layer has a gas barrier property only by a coating film formed by a vacuum deposition method, but a coating layer that is an inorganic compound layer formed by a coating method is formed on the vapor deposition layer that is an inorganic compound layer formed by a vacuum deposition method to form a gas barrier layer (22 ).

  By combining these two layers, a reaction layer of both layers is formed at the interface between the inorganic compound layer by the vacuum deposition method and the inorganic compound layer by the coating method, or the inorganic compound layer by the coating method becomes an inorganic compound layer by the vacuum deposition method. A dense structure is formed by filling and reinforcing defects such as pinholes, cracks, and grain boundaries, or by reinforcing them, so that high gas barrier properties, moisture resistance, and water resistance are achieved, and flexibility that can withstand deformation is achieved. Therefore, it can be suitable as a plastic bag.

  When SiO is used as the gas barrier layer (22), for example, the coating is transparent, so that the contents can be seen from the outside of the packaging bag. These may be properly used depending on the application and required quality.

  In addition, since no metal foil is used as the gas barrier layer (22), for example, when necessary, the plastics are suitable for heating with a microwave oven, as well as having no trouble in using a metal detector for products. There is also an advantage in the resilience of the shape when the bag is pushed from the outside and used.

  The plastic film used for the gas barrier film (13) is a film made of a polymer resin composition, such as polyolefin (polyethylene, polypropylene, etc.), polyester (polyethylene terephthalate, polybutylene terephthalate, polyethylene naphthalate, etc.), polyamide ( Nylon-6, Nylon-66, etc.), polyimide, and the like can be used and are appropriately selected according to the application. Particularly when polypropylene or polyethylene terephthalate is used as the plastic film (21), it is more preferable in terms of film strength and price.

  The gas barrier film (13) can be laminated by providing, for example, an adhesive layer (14) in the laminate (20). At this time, for example, each layer can be bonded and laminated using a dry coating method. Moreover, in the example shown in FIG. 3, since there exists a plastic film (17) further outside a plastic bag, the front and back of a gas barrier film (13) are not ask | required.

(Print layer)
Necessary information on image enhancement as a product, contents, or transfer thereof can be provided by printing on a layer visible from the outside of the plastic bag as needed.

  For example, in the layer structure of the laminate (20), the plastic film (17) can be provided with a printing layer (18) and laminated. If a transparent film is used for the plastic film (17), the plastic film (17) is arranged so as to be on the outside of the plastic bag (20) according to the present invention, and is visible from the outside, and the printed layer (18) is the plastic bag. Therefore, it is not exposed to the outside, and therefore, it has excellent friction resistance and excellent design in appearance.

  The plastic film (17) that can be used at this time is a film made of a polymer resin composition, for example, polyolefin (polyethylene, polypropylene, etc.), polyester (polyethylene terephthalate, polybutylene terephthalate, polyethylene naphthalate, etc.), polyamide (Nylon-6, nylon-66, etc.), polyimide and the like can be used, and can be appropriately selected according to the required quality and application.

  Particularly when polypropylene or polyethylene terephthalate is used as the plastic film (17), it is more preferable in terms of film strength and price.

  Here, the printing method and the printing ink for forming the printing layer (18) are not particularly limited, but from the known printing method and printing ink to the plastic film (17). In consideration of printability, design properties such as color tone, adhesiveness, influence on contents, safety as a container, or required physical and chemical resistance, it may be appropriately selected.

  As the printing method, for example, a gravure printing method, an offset printing method, a gravure offset printing method, a flexographic printing method, an inkjet printing method, or the like can be used. Of these, the gravure printing method can be preferably used in terms of productivity and high definition of the pattern.

  As described above, according to the present invention, it is possible to provide a plastic bag that is easy to open and does not spill contents or adhere to the hand when transferred to another container. .

DESCRIPTION OF SYMBOLS 1 ... Peripheral heat seal 2 ... U-shaped heat seal 3 ... Three-sided heat seal 4 ... Rectangular lower side 5 ... U-shaped notch 6 ... Notch 7 ... Opening 8 ... Other container 9 ... Opening 10 ... Plastic bag 11 ... Contents 12 ... End face 13 of mouth part ... Gas barrier film 14 ... Adhesive layer 15... Plastic film base layer 16... Sealant layer 17... Plastic film 18.

Claims (3)

It is a rectangular plastic bag for transferring contents, which is made of a plastic film or a laminate based on a plastic film, and is made by heat-sealing the periphery.
At the center of the lower side of the rectangle, a notch is provided in a U-shaped or V-shaped shape toward the upper side, and the periphery of the notch is heat-sealed.
The left or right side of the heat seal part at the periphery of the notch is provided with a notch smaller than the heat seal width,
A plastic bag, characterized in that the other part of the heat seal part at the periphery of the notch, the peripheral edge opposite to the heat seal part, and the part surrounded by the lower side of the rectangle are heat sealed.   2. The plastic bag according to claim 1, wherein an opening formed by tearing from the notch to an opposing peripheral edge is smaller than an opening of a container to which contents are transferred.   The plastic bag according to claim 1 or 2, wherein the rectangular plastic bag has longer left and right sides than the upper and lower sides of the rectangle.

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