JP2000062812A - Synthetic resin bag with string - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a synthetic resin bag having a string therein in which continuous production can be carried out without increasing the number of manufacturing steps even under application of the string, handling of the string of facilitated and its cost increasing state is not produced. SOLUTION: This bag is made such that at least one end of either a thin belt-like or knitted string 3 si welded by heat seal 2 at a main body 1 of a bag formed by synthetic resin film and temporarily fitted or fixed and when it is used, the string 3 is easily removed or separated from the main body 1 of the bag. In addition, it is preferable that the string 3 is colored with blue, yellow, red and the like and further it is preferable that a surface of the belt- like string 3 is printed with advertisement copy.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a synthetic resin bag provided with a string which can be continuously produced and is used as a garbage bag, a general-purpose plastic bag or the like.

[0002]

2. Description of the Related Art FIG. 4 is a diagram showing an embodiment of a conventional product,
This is provided with a folded-back portion outside the opening (11), and a cord body (3) is put inside the folded-back portion, one on the front side and one on the back side. And the ends of the cord body (3) are also fixed to form the bag body (1),
In addition, a notch for drawing out the cord body (3) is provided at the front and rear at the center of the opening (11). When manufacturing this bag, a step of cutting one end of a thin tube-shaped synthetic resin film, a step of folding both cut pieces outward to form a folded portion, and a cord body in the folded portion ( 3) The process of putting in, the heat seal (2) on both sides of the bag body (1)
The bag was completed through the steps of, the step of providing notches in the front and rear of the folded portion, and the step of separating from the synthetic resin film. When using this bag as a dust container, put dust into the bag body (1) and then push open the notch with your finger to pull out the string (3).
When it is pulled out further, the opening (11) shrinks. Then they tied the strings (3) together and carried them to the garbage yard.

As another synthetic resin bag with a string, a string body (3) is inserted all around along the upper edge of the bag body (1), and the string body (3) is pulled out from the notch to draw a purse string. There was also a structure with the upper part shrinking, but the structure was complicated and continuous production was not possible, and no other than the above was found. Many paper trash bags and the like are provided with a string, but none of them are expensive and can be continuously produced.

[0004]

However, in the case of the string-made synthetic resin bag provided with the notch, it is necessary to change all the steps when changing the width and thickness of the string body (3).
It was very troublesome. In addition, many processes must be performed to manufacture this bag, and if trouble occurs in each process, the line stops. For this reason, it is very difficult to maintain each process in a good state, and troubles increase as the number of processes increases, resulting in poor productivity and high cost. Furthermore, when using the above-mentioned synthetic resin bag with a string, even if there is little dust inside, only the upper part can be closed, so there is a problem that it cannot be tightened at the position corresponding to the dust inside. It was

The present invention provides a synthetic resin bag with a string attached, which does not increase the number of steps even if a string is provided, is easy to handle, and can be continuously produced without increasing the cost. The purpose is to

[0006]

The present invention has been made to solve the above problems, that is, it is formed by heat sealing the lower end of a tube-shaped synthetic resin film. The bottom part is placed in a bag body having an opening whose upper end is open, having a higher melting point than that and extending from the opening part to the bottom part, and at the same time one end is provisionally formed when the bottom part is formed by the heat seal. The structure is provided with a string made of synthetic resin that is stopped. In addition, a bag body having a bottom portion which is provided with a foldable portion at the lower end and which can be expanded, and an opening portion whose upper end is opened, and both side portions extending from the opening portion to the bottom portion by heat sealing are adhered to the bag body. Alternatively, a string made of synthetic resin may be provided which has a higher melting point and is arranged over both sides of the side portion and both ends of which are temporarily fixed at the same time when the side portions are brought into close contact with each other by the heat seal. Further, one end of a thin strip-shaped cord body may be welded to the bag body formed of a synthetic resin film with heat seal, and the cord body may be easily separated from the bag body. The cord may be in the form of a thin strip or a braid, and may have a different color from that of the bag body, or the advertising line may be printed on the surface of the strip. In addition, the string used in the present invention does not mean only the string, but means that there is a function that can be used as a string.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a diagram showing an embodiment of the present invention, and description will be made based on this. (1) is a bag body having a bottom portion (12) formed by heat-sealing a lower end of a tube-shaped synthetic resin film (2) and an opening portion (11) having an upper end opened. As the synthetic resin, polyethylene, vinyl, polypropylene, polyester, nylon or the like is used. The bag body (1) is used as a garbage bag, a general-purpose plastic bag, etc., and is determined depending on the application such as colorless and transparent or black. (3) is arranged from the opening (11) of the bag body (1) to the bottom (12) and one end of which is temporarily fixed at the same time when the bottom (12) is formed by the heat seal (2). A band-shaped cord body made of synthetic resin and having a melting point higher than that of the bag body (1) is used. This time,
If the melting point of the cord body (3) is the same as or lower than that of the bag body (1), it will be completely welded to the bag body (1) and cannot be temporarily fixed. It is also possible to purchase colored thin strips of the string (3), for example, blue, yellow, red, etc. which are commercially available as strings for packing. Furthermore, a advertising phrase, a company name, or the like may be printed on the surface of the band-shaped cord (3). It is to be noted that, in addition to the colored thin strip-shaped string (3), a braided string such as a twisted string or a braid may be used. The position of the cord (3) may be the position of the imaginary line in the figure, or may be anywhere in the vertical direction.

FIG. 2 is a view showing another embodiment of the present invention, which is different from the above embodiment in that the bottom portion (12) of the bag body (1) is located at the lower end of the tube-shaped synthetic resin film. The folding part (4) is provided so that it can be expanded, and the heat seal (2) is provided.
Is performed on both sides of the side extending from the opening (11) to the bottom (12), the string (3) is arranged on both sides of the side, and both ends thereof are temporarily fixed by the heat seal (2). ing. The position of the cord (3) may be the position of the imaginary line in the figure, or may be any position in the lateral direction. Others are the same.

In another embodiment, a bag body (1) as shown in FIG. 1 is provided with one end of a belt-shaped synthetic resin string (3) having a thickness smaller than that of the bag body (1). May be welded with a heat seal (2). This time,
If the melting point of the string body (3) is the same as or lower than the melting point of the bag body (1) and the thickness is, for example, 0.03 mm, the string body (3) ) Is 0.
It should be 025 mm or less. The string (3) is a heat shield.
Although it is welded with the le (2), pulling the string (3)
It was confirmed that the cord body (3) could be easily torn from immediately above the welded portion and separated from the bag body (1).

Next, the manufacturing method of the present invention will be described.
A tube-shaped synthetic resin film (A) wound in advance is prepared. First, a commercially available colored strip-shaped packing cord (3) is set so as to be parallel to the longitudinal direction while being set in the bag making machine. Next, pull out the tip of the synthetic resin film (A) and the tip of the cord body (3) at the same time,
The length corresponding to the length of the bag body (1) is sequentially sent out, and the heat sealing (2) is performed with one heating wire to closely form the bottom portion (12) and at the same time one end of the string body (3). Temporarily fix and then cut the side of the heat seal (2) to make a synthetic resin film (A)
And the bag is completed (see FIG. 3). When one end of the cord body (3) is heat-sealed (2) and temporarily fixed at the same time, the melting point of the cord body (3) is higher than the melting point of the bag body (1), so that the bag body is completely sealed. It is in a state of being temporarily fixed without being in close contact with the main body (1). Next, this bag is folded by a machine and packed into an appropriate number of sheets such as 5 sheets or 10 sheets to become a commercial product. It should be noted that, according to the present invention, as shown in FIG.
If there is, a tube-shaped synthetic resin film (A)
Fold one side and cut the other side to open.
When the tip of the synthetic resin film (A) and the tip of the cord body (3) are pulled out at the same time, the length corresponding to the width of the bag body (1) is sequentially sent out and the heat seal ( 2) Let it adhere to both sides of the cord and both ends of the cord (3), and then heat it.
The space between the two (2) is cut and separated from the synthetic resin film (A) to complete the bag.

When the product of the present invention is used as a garbage bag, one product is taken out from a commercially available product which is folded and packed appropriately. At this time, if the band-shaped cord body (3) is colored, it will be easy to understand when one bag main body (1) is taken out from the packed body. In addition, when a transparent bag product is purchased, the color is attached to the product so that it can be distinguished from other products, and the product can be differentiated. Next, the opening (11) is opened, and dust or the like is put inside the bag body (1). After completing the insertion, when the string body (3) is lightly pulled, the string body (3) is detached from the bag body (1), and the string body (3) is placed in the bag body (1) more than the position of dust and the like. If you tie it up a little, the opening (11) will close.
In addition, when removing the cord body (3) from the bag body (1), it may be performed before putting in dust and the like. When removing dust, when there is little dust in the bag body (1), the string body (3) is removed and the bag body (1) is wound, and then the string body (3) is fixed so that the winding can be fixed. It is better to tie them together and carry them in a small size to the garbage yard. As described above, the product of the present invention has a bag body (1) when the content is small like the conventional product.
Unlike the one where only the upper opening (11) is closed,
The contents can be carried in a tight state without moving.

[0012]

The present invention having the above-mentioned constitution has the following effects.

A bottom portion (12) formed by heat-sealing a lower end of a tube-shaped synthetic resin film (A) as in claim 1, and an opening portion (11) whose upper end is opened. ) And a string body (3) made of a synthetic resin having a higher melting point than that of the bag body (1) are arranged from the opening (11) to the bottom (12) and the heat seal ( By temporarily fixing one end of the cord body (3) at the same time as forming the bottom portion (12) in 2), the cord body (3) can be easily detached without increasing the number of steps. It is easy to handle, and continuous production is possible without increasing costs. Also, unlike the conventional product, even if a small amount of dust is put inside the bag body (1), it can be tied using the string body (3) at a position corresponding to the dust put inside. Moreover, when changing the width or thickness of the cord (3), it is not necessary to change the whole process as in the past, and it is only necessary to change the set of the cord (3) at the beginning, so that troubles are prevented. Then, each process can be maintained in a good state.

A foldable bottom portion (12) formed by providing a folding portion (4) at the lower end of a tube-shaped synthetic resin film (A) as in claim 2, and an opening portion having an upper end opening. (11)
And a bag body (1) which has and is adhered by heat seal (2) on both sides of the side extending from the opening (11) to the bottom (12).
In addition, a string (3) made of synthetic resin having a melting point higher than that and being arranged on both sides of the side part, and both ends of which are temporarily fixed at the same time when the side parts are closely adhered by the heat seal (2). By providing it, the same effect as that of claim 1 can be expected, and if the bottom part (12) is expanded, a bag with a large storage capacity can be obtained by inserting a bag.

According to a third aspect of the present invention, a bag main body (1) formed of a tube-shaped synthetic resin film is made of a belt-shaped synthetic resin having a thickness smaller than that of the bag main body (1). Even if one end of the string (3) is completely welded by the heat seal (2) and the string (3) is fixed to the bag body (1), it is welded when the string (3) is pulled. Since the cord body (3) can be easily torn from immediately above and separated from the bag body (1), the same effect as in claim 1 can be obtained.

According to a fourth aspect of the present invention, a bag body (1) formed of a synthetic resin film (A) has a band-shaped synthetic resin cord having a thickness smaller than that of the bag body (1). (3)
It may be provided by welding one end of the bag with a heat seal (2), and by changing the color of the string body (3) from that of the bag body (1), one of a plurality of stacked sheets is stacked. When the bag body (1) of (1) is taken out, the color of the string body (3) is distinguished from other products so that the products can be differentiated.

When a thin strip is used for the cord body (3) as in claim 5, the area of the temporary fixing portion is increased to enable stable temporary fixing, and when the product is folded into a product, a part thereof is obtained. Will not rise. In addition, the colored strip makes it easier for the consumer to attract attention and makes it easier to see the difference from the conventional product. Moreover, when the bag body (1) is separated, it is possible to avoid partial wear of the cutting blade at the location of the cord body (3), and a commercially available band tape or a colored cord for packaging can be used as it is. It becomes easy to arrange materials for 3).

By using a braided cord as the cord body (3) as in claim 6, when the bag body (1) is tied, it can be strongly and reliably tightened.

By printing a advertising phrase or the like on the surface of the cord body (3) as claimed in claim 7, it can be easily adopted as a gift or a crude product, and it can be expected that demand will increase and when it is used. Since the band-shaped cord (3) is rolled and the presence of the advertising phrase is unknown, the consumer can use it without any resistance.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing an embodiment of the present invention.

FIG. 2 is an explanatory view showing a bag body of another embodiment.

FIG. 3 is an explanatory diagram showing a part of a state in which the present embodiment is continuously manufactured.

FIG. 4 is an explanatory diagram showing an example of a conventional product.

[Explanation of symbols]

1 bag body 11 opening 12 bottom 2 heat seals 3 string 4 Folding part

Claims (7)

[Claims] 1. A bag having a bottom portion (12) formed by heat-sealing a lower end of a tube-shaped synthetic resin film and an opening (11) having an upper end opened. In the body (1),
The melting point is higher than that, and one end of the heat seal (2) is temporarily fixed at the same time when it is arranged from the opening (11) to the bottom (12) and the bottom (12) is formed by the heat seal (2). A synthetic resin bag provided with a string, characterized in that a synthetic resin string (3) is provided. 2. A tube-shaped synthetic resin film having a bottom part (12) provided with a folding part (4) at the lower end and capable of expanding, and an opening part (11) having an opening at the upper end thereof. Department (1
The heat shield (2) on both sides of the side portion extending from 1) to the bottom portion (12) is adhered to the bag body (1). -A synthetic resin bag provided with a string, characterized in that a string (3) made of a synthetic resin, which is temporarily fastened at both ends when the side portions are closely attached by the rule (2), is provided. 3. A bag main body (1) formed of a tube-shaped synthetic resin film, and a belt-shaped synthetic resin cord (3) having a thickness smaller than that of the bag main body (1). A synthetic resin bag having a string attached, one end of which is welded with a heat seal (2). 4. The synthetic resin bag with the string according to claim 1, 2 or 3, wherein the string (3) has a color different from that of the bag body (1). 5. The bag made of synthetic resin with the cord according to claim 1, 2 or 4, wherein the cord body (3) has a thin strip shape. 6. The synthetic resin bag to which the cord according to claim 1, 2 or 4 is attached, wherein the cord body (3) is in the shape of a braid. 7. A synthetic resin bag to which a string according to claim 3 or 5 is attached, in which a advertising phrase or the like is printed on the surface of the string body (3).