JPH10297650A - Plastic bag body with handle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a plastic bag body with a large rate of capacity decrease wherein transportation and removal at contents is stable, operation is easy, and a handle may not be cut or the handle may not bite into a hand even if a capacity is relatively large or a film of the bag body is thin compared with a weight of the contents. SOLUTION: The plastic bag has a handle like a sheet with a part of the bag body joined, while a hole 3 is opened on the sheet-like part 1. In this case, the bag body has a handle formed with a handle part where a non-sealed part 2 is provided with a width of at Least 2 mm along an outer periphery of the hole 3 where a load is applied.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention is useful for a plastic bag having a handle as a container for not only a liquid having a low viscosity but also a substance having a high viscosity, a paste-like substance, and a liquid substance containing a solid. , If the inner volume of the bag is large,
Alternatively, when the film forming the bag is thin, it is difficult to cut the handle during handling and bite into the hand holding the handle, which is difficult. About the method.

[0002]

2. Description of the Related Art Various containers such as glass bottles, metal cans, and polyalkylene terephthalates are used for storing and transporting drinking water, juice, carbonated or alcoholic beverage liquids, or liquid chemicals. (Commonly known as PET) and blow-molded bottles of resin such as polyethylene are widely used. These containers are typically discarded after removal of the contents with little reuse. In the case of discarding or collecting glass bottles, metal cans, blow-molded bottles made of plastics such as pets and polyethylene, etc., the volume reduction rate (volume after use / volume before use) is 1 Due to the close proximity, collection or disposal of bottles, cans, bottles, etc., required a large amount of expense as a disposal cost.

On the other hand, for the purpose of reducing the weight of the packaging material, increasing the size and safety of the package, and reducing transportation costs, a plastic bag is provided with a resealable plug, which is made of a rigid cardboard. Bag-in-boxes, which are stored in boxes such as boxes, have been developed.Bag-in-boxes are excellent for storing low-viscosity liquids, but have not yet been sufficiently developed as small containers. In addition, it cannot be used for high-viscosity syrupy substances, paste-like substances such as miso and butter, and solid mixtures such as syrup-picked fruits. In contrast, plastic bags can store not only low-viscosity liquids, but also high-viscosity substances, mixed liquids containing solids, or granular materials such as pellets, various powders, and various contents such as, It is an excellent container with a volume reduction ratio of 1/100 or less. However, plastic bags are difficult to handle, such as transporting, moving, and taking out the contents, because the bags are softer than hard containers such as ordinary boxes, bottles, and bag-in-boxes. It is proposed to improve by attaching a handle to solve the problem. In order to solve these problems, a method of attaching a handle after manufacturing a plastic bag as shown in FIG. 6 (post-installation method) or a method of forming a hole for the handle at the entrance side of the bag as shown in FIG. And so on.

[0004] A method of retrofitting a handle is suitable for carrying when the contents are put in a plastic bag obtained, but it is difficult to take out the contents due to the softness of the bag itself, In such a case, the operation cannot be performed with one hand, and the handle portion is made of a different material, so that an increase in cost is inevitable, and it cannot be applied to a small bag with a low price. In addition, the method of forming a handle by making a hole on the entrance side of the bag is excellent in terms of portability and cost, but when filling the contents and then sealing it to heat it, this method is used. Since the heat seal needs to be closer to the contents than the position where the handle is provided, cutting the heat seal part with scissors etc. to open the sealed bag will cut off the handle, so the opening method is limited In addition, there is a problem in that the handle cannot be used to take out the contents because the handle is lost in the plastic bag after opening.

The inventors of the present invention have proposed a plastic bag which is easy to open and take out a liquid or the like and which is excellent in cost. By sealing a film including a part of the plastic bag, the sheet portion is formed. A plastic bag was formed, and a handle was formed by punching a hole in the sheet portion for the handle (Japanese Patent Application No. 8-271452). This plastic bag was effective in the case of a small size such as a capacity of about 500 g or less. However, in the case of a slightly large plastic bag or the film of the bag was thin in proportion to the weight of the contents. At times, it is necessary to forcibly tilt the plastic bag with the handle when taking out the contents, etc., so stress is concentrated on a part of the handle, and the handle is cut or the handle is There were drawbacks such as digging into.

[0006]

SUMMARY OF THE INVENTION The present invention relates to a plastic bag having a large volume reduction rate which can be used for ordinary liquids, viscous substances or solid-containing liquid substances. Stable and easy to operate, with a handle that is less likely to be cut or cut into the hand even when the bag is relatively thin or the bag film is thin compared to the weight of the contents. An object of the present invention is to develop a plastic bag and a molding method thereof.

[0007]

According to the present invention, there is provided (1) a plastic bag, wherein a handle portion is in the form of a sheet joined together with a part of the bag, and a hole is formed in the sheet portion. A plastic bag having a handle in which a handle portion having an unsealed portion is formed on an outer peripheral portion of a portion where a load is applied to the hole, (2) a hole formed in the sheet-like portion (1) a plastic bag having the handle according to (1), wherein an unsealed portion is provided with a width of at least 1 mm on an outer peripheral portion of the portion to which the load is applied; The part that is not sealed to the outer peripheral part of the part where the load is applied is
A plastic bag having a handle of (1) or (2) which is provided in a double or more annular shape with respect to the hole; and (4) an outer peripheral portion of at least a portion of the plastic bag which exerts a load on the handle. With the exception of the portion including, the seal including a part of the bag body is sealed by heat sealing and integrated into a sheet shape, and the sheet-shaped portion is left unsealed in the outer peripheral portion of the portion where the load is applied. The above object has been achieved by developing a method of forming a plastic bag having a handle, which is characterized by making a hole.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION The film used for the plastic bag of the present invention may be a relatively soft material, for example, polyethylene, polypropylene, polyethylene terephthalate, polyamide, soft vinyl chloride, polyvinyl as long as the inner surface can be heat-sealed. Single films of thermoplastic resins such as alcohol, polyvinylidene chloride, and ethylene-vinyl acetate copolymer, films of mixtures, films on which metals are deposited, or these or metal foils, paper, nonwoven fabrics, woven fabrics, various foams, etc. A laminated laminate or composite film can be used. As a preferable film material used for the plastic bag of the present invention, a polyolefin-based resin such as polyethylene and polypropylene is selected from the viewpoints of moldability, stability, and ease of recovery.
The thickness of the film varies depending on the capacity of the plastic bag, the hardness of the material, etc., but self-sustainability in an empty container is unnecessary, and even a standing pouch is not self-supporting when empty. May be. These raw materials are extruded into a film and molded into a bag, or a soft plastic bag is formed by a molding method such as injection or blow. The shape is a bag or a standing pouch (all of them are referred to as a bag in the present invention).
Although not required, the shape of the bottle may be used. If necessary, the bag may be provided with a plastic chuck inside the bag to maintain resealability.

The present invention will be described below with reference to the drawings. FIG. 1 is a perspective view of a bag according to one embodiment of the plastic bag of the present invention. A sheet-like portion 1 in which the film of the bag is bonded is provided at one end of the opening for taking in / out the contents of the plastic bag, and a hole 3 for a handle is provided in a part thereof (the handle portion in FIG. 1). A). The bonding of the film can be performed by heat sealing or an adhesive. The method of heat sealing is to bond the film of the sheet-like portion 1, open the hole 3 for the handle, and seal the outer peripheral portion of the portion where the hole 3 is loaded. This is advantageous because the three steps of the portion 2 not formed can be simultaneously formed. The present invention will be described below by a method using heat sealing. The sheet-like portion 1 is formed in a part of the bag by heat sealing. In this case, depending on the thickness of the film of the bag, the volume of the bag, the kind of the contents, etc., the film of the bag may be directly used or the bag may be used. In general, a sheet portion is formed by adding a material having the same material as that of the film and having an appropriate thickness, but a different material may be added if heat sealing is possible.

The hole 3 for the handle is provided with the hole 3 in the sheet-like portion 1.
When the sheet-like portion 1 is formed by heat sealing, a non-heat-sealed portion 2 is formed in advance on an outer peripheral portion of a portion of the hole 3 where a load is applied. 1 mm or more, preferably 2 m, in the outer peripheral portion of the portion where the load is applied
If a portion 2 having a width of not less than m and having no heat seal can be formed, when the bag is held by a handle or when the contents are taken out, the non-heat-sealed portion 2 is a sheet-like portion formed by heat sealing. It is considered that the handle is prevented from being cut in order to enclose the handle 1 and that the handle 1 is effectively prevented from biting into the hand. Although the detailed reason for this is unknown, it is considered that the portion 2 that is not heat-sealed alleviates the concentration of stress. Specific examples of the portion 2 not subjected to heat sealing are shown in FIGS. 2 to 5 which are enlarged views of the handle A in FIG. FIG. 2 shows a case where a portion 2 which is not heat-sealed is provided on the outer peripheral portion of the hole 3, and FIG.
FIG. 4 shows an example in which a portion 2 which is not heat-sealed is provided only in a portion of the outer peripheral portion where a load is applied. In FIG. 4, the outer peripheral portion of the hole 3 is a heat-sealed portion 1, but no heat sealing is performed on an outer portion thereof. FIG. 5 shows an example in which a portion 2 is provided around the hole 3 where a double or more annular heat sealing is not performed. The non-heat-sealed portion 2 may be provided on the entire outer peripheral portion of the hole 3 or may be provided only on a portion to which a load is applied. In the present invention, the heat seal portion 2 does not need to be in direct contact with the hole 3 as long as it is provided on the outer periphery of the portion of the hole 3 where a load is applied.

In the present invention, the handle provided on the plastic bag is attached to the inside of the bag outlet (the bag side for putting in the contents) as shown in FIG. The handle may be outside, or the handle may be attached to two or more places on the bag. The method of opening the plastic bag can be applied by any method such as heat sealing, plastic chuck, tearing tape, perforation, and the like.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A width of 260 mm and a height of 440 as shown in FIG.
One end of a take-out opening of a stand pouch having a width of 130 mm and a bottom width of 130 mm was heat-sealed to form a sheet-like portion, and a hole was formed in the portion to form a bag with a handle. The bag was prepared using a laminated film obtained by dry-laminating a 15 μm-thick nylon film and a 200 μm-thick low-density polyethylene film with a urethane-based adhesive. The bag is made so that the low-density polyethylene film is on the inside, and heat is applied over the width of 55 mm and the length of 130 mm so that the outer periphery of the portion where the handle is loaded is not heat-sealed at the outlet of the bag. The sheet was formed by sealing. In the sheet-shaped portion, a semicircular hole having a width of 18 mm and a length of 50 mm and a radius of 9 mm at both ends in the length direction is formed, and a 2 mm wide non-heat-sealed portion is formed over the entire periphery of the hole. Was. The heat-sealed portion has a sheet-like portion (heat-sealed portion) around the hole having a width of at least one.
The handle was formed so as to be 5 mm or more. This bag is filled with 4.7 kg of water, heat-sealed and sealed to make 10 bags, holding the handle, stretching the arm at a speed of one revolution per second, rotating on the front of the body, Loaded part. As a result, as shown in Table 1, the handle strength was strong enough to be used. The bite into the handle of the handle could not be quantified, but it seemed soft and small.

(Comparative Example) A bag of the same material and the same size as that of the embodiment was prepared, and the periphery of the hole was entirely heat-sealed. Formed a handle. As a result, the width of the heat-sealed sheet provided around the handle was 2 mm wider than in the example. The bag was filled with 4.7 kg of water and heat-sealed to make 10 bags, and the handle was held and a load was applied to the handle as in the example. Table 1 shows the results. In the comparative example, although the width of the sheet portion around the hole is 2 mm wider than the example, the strength is low,
It seems that the use of such load conditions is unbearable. During the experiment, I felt pain because the handle bites into my hand before breaking the handle.

[0014]

[Table 1]

[0015]

The present invention has an excellent volume reduction rate at the time of disposal or recovery, is useful as a container for a viscous substance, a paste-like substance or a solid mixture, and is easy to open and to take out a liquid. This method uses a plastic bag that is excellent in cost. That is, the method of forming a sheet-like portion including a part of the bag by heat sealing, and forming a handle by providing a hole in the sheet-like portion, as compared to a bag or a content having a slightly larger capacity. We have developed a plastic bag with a small number of handles that break or break into the handle when applied to a thin film bag, and a method of forming the same. Plastic bags obtained according to the present invention include various liquids as well as glass bottles, metal cans or plastic bottles, as well as high-viscosity substances, solid-containing liquids, and powders that have been considered difficult in these containers. It can be used for storage and transportation of fluids, etc., and can be used as a safe container that is easy to handle and has little cutting of the handle and little biting into the handle.

[Brief description of the drawings]

FIG. 1 shows an example of a plastic bag according to the present invention.

FIG. 2 is an enlarged view of a handle portion A of the plastic bag according to the present invention (an example in which a portion that is not heat-sealed is provided on an outer peripheral portion of a hole).

FIG. 3 is an enlarged view of a handle portion A of the plastic bag according to the present invention (an example in which a portion not subjected to heat sealing is provided only in a portion where a load is applied to an outer peripheral portion of a hole).

FIG. 4 is an enlarged view of a handle portion A of the plastic bag body of the present invention (an example in which an outer peripheral portion of a hole is heat-sealed, and a non-heat-sealed portion is provided outside the hole).

FIG. 5 is an enlarged view of a handle portion A of the plastic bag body of the present invention (an example in which a double or more annular non-heat-sealed portion is provided around a hole).

FIG. 6 shows an example of a conventional plastic bag (an example in which a string-shaped handle is separately attached).

FIG. 7 shows an example of a conventional plastic bag (an example in which a handle is punched out).

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Sheet-like part 2 Non-seal part 3 Hole (for handle) A Handle part

Claims (4)

[Claims] In a plastic bag, a handle portion is in the form of a sheet joined together with a part of the bag, and a hole is formed in the sheet portion, and a load is applied to the hole. A plastic bag having a handle, wherein a handle having an unsealed portion is formed on an outer peripheral portion of the portion. 2. A plastic bag having a handle according to claim 1, wherein an unsealed portion is provided with a width of at least 1 mm on an outer peripheral portion of a portion where a load is applied to a hole formed in the sheet portion. . 3. The hole according to claim 1, wherein an unsealed portion is provided in an outer peripheral portion of a portion of the hole formed in the sheet-shaped portion where the load is applied, in a double or more annular shape with respect to the hole. A plastic bag with a handle. 4. In a plastic bag, except for at least a portion including an outer peripheral portion of a portion where a load is applied to a handle, the bag is sealed including a part of the bag by heat sealing, and integrally formed into a sheet. A method for forming a plastic bag having a handle, characterized in that a hole is formed in the sheet-like portion so that a portion that is not sealed remains on an outer peripheral portion of a portion to which a load is applied.