JPH0958706A - Self-supporting packaging bag and manufacturing method thereof - Google Patents

Abstract

(57) [Summary] [Purpose] To be able to satisfactorily pour low-viscosity contents at low cost. [Structure] Both side portions of a pair of flexible body sheets 11 are adhered, and a flexible bottom sheet 12 is attached to the bottom of the body sheet.
In the self-supporting packaging bag 10 constituted by adhering so that it can be expanded and adhering the top portion of the body sheet so that the spout 14 can be formed, the flexible flow rate control sheet 18 having the squeezing holes 21 It is configured to be adhered to the inner surface of the body sheet so that the contents flow to the spout through the squeezing hole.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a self-supporting packaging bag for filling a low-viscosity content, and a method for producing the same.

[0002]

2. Description of the Related Art Conventionally, as a first conventional technique shown in FIG. 9, a self-supporting packaging bag (standing pouch) 1 which is filled with contents such as liquid or powder and distributed and sold is generally known. In this self-supporting packaging bag 1, generally, a bottom sheet 4 is heat-bonded to a lower portion of a body sheet 2 made of a flexible sheet so that the bottom sheet 4 can be expanded, and the body sheet 2 is heat-bonded on both sides. The heat seal portion 3 is formed and configured.
After the space 5 formed by the body sheet 2 and the bottom sheet 4 is filled with the liquid or powder, the top portion of the self-supporting packaging bag 1 is heat-bonded and sealed.

At this time, a spout 6 is formed in the top part, and when the self-supporting packaging bag 1 is used, the top part is cut along a cutting line 7 so that the contents in the self-supporting packaging bag 1 can be drawn from the spout 6. Allows pouring of things.

As the second conventional technique, the actual construction of Shokai 62-1
As in the invention described in 08238, there is a device in which a soft metal piece is arranged near the spout of a self-supporting packaging bag to forcibly open the spout.

[0005]

SUMMARY OF THE INVENTION In the first prior art,
When the width direction dimension a of the spout 6 of the self-supporting packaging bag 1 is reduced to suppress the pouring flow rate of the contents, the spout 6 may not be sufficiently opened and may be closed. Further, in order to sufficiently open the spout 6, the dimension a in the width direction of the spout 6
If the value is set to a large value, if the content has a low viscosity, the flow rate of the content discharged from the spout 6 becomes excessive.

Further, in the second prior art, since the soft metal piece made of a material different from that of the self-supporting packaging bag is used in order to properly open the spout of the self-supporting packaging bag, the manufacturing cost is increased. .

The present invention has been made in view of the above circumstances, and an object thereof is to provide a self-supporting packaging bag capable of satisfactorily pouring out a low-viscosity content at low cost. An object of the present invention is to provide a method for manufacturing a self-supporting packaging bag, which can easily fill the contents in the self-supporting packaging bag.

[0008]

According to a first aspect of the present invention, a flexible bottom portion is bonded to both sides of a pair of flexible body sheets that are arranged so as to face each other, and the flexible bottom portion is attached to the bottom portion of the body sheet. In a self-supporting packaging bag formed by adhering the sheet so that it can be expanded and adhering the top portion of the body sheet so that a spout can be formed, a flexible flow control sheet with a squeezing portion is provided on both sides. It is configured to be adhered to the inner surface of the body sheet so that the contents flow to the spout through the squeezing section.

According to a second aspect of the present invention, after bonding both side portions of a pair of body sheets that are arranged to face each other and bonding the bottom sheet to the bottom of the body sheet, the body portion is joined. Filling the contents from the top of the sheet, in the method of manufacturing a self-supporting packaging bag to bond the top of the body sheet to manufacture a self-supporting packaging bag, bonding both side parts of the copper sheet At the same time, both ends of the flow rate control sheet are adhered to the both side portions of the body sheet, the contents are filled, and then the entire circumference of the flow rate control sheet is adhered to the inner surface of the upper sheet. Is.

The invention described in claim 1 has the following operation. A flow rate control sheet having a throttle is adhered to the inner surface of the body sheet oppositely arranged, and since the content flows to the spout through the throttle, the content of the spout is preferably held in the open state. It is possible to pour out an object, especially a low-viscosity content from the pouring outlet without excessively controlling the flow rate by controlling the flow rate at the narrowed portion of the flow rate control sheet. Further, the flow rate control sheet is made of the same material as the body sheet and the bottom sheet, so that the cost is low. For these reasons, the low-viscosity contents can be satisfactorily poured out at low cost.

The second aspect of the present invention has the following operation. Before filling the contents, only the both ends of the flow control sheet are adhered, and a large opening is formed between the flow control sheet and both body sheets, so that the contents flow in this opening. Are filled in the self-supporting packaging bag. Therefore, despite the presence of the flow rate control sheet, the content can be easily filled into the self-supporting packaging bag.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 (A) is a front view showing a cutaway part of one embodiment of the self-supporting packaging bag according to the present invention. FIG. 1B is a perspective view showing the flow rate control sheet of FIG. FIG. 2A shows II of FIG. 1A.
It is a sectional view taken along the line A-IIA. FIG. 2B is the same as FIG.
It is an IIB part expanded sectional view of (A). FIG. 3 shows FIG.
FIG. 3 is a perspective view of the self-supporting packaging bag in which the contents are filled and the usage state is shown. FIG. 4A shows FIG.
It is a top view which shows the manufacturing equipment of the self-supporting packaging bag which implements one embodiment of the manufacturing method of the self-supporting packaging bag which manufactures the self-supporting packaging bag of (A). FIG. 4B is an enlarged sectional view of the IVB portion in FIG. FIG. 5: is a block diagram which shows the self-supporting packaging bag which was manufactured in the manufacturing facility of the self-supporting packaging bag of FIG. 4 (A), and was filled with the content.

In the self-supporting packaging bag 10 shown in FIGS. 1 to 3, a folded bottom sheet 12 is heat-bonded to the lower part of two body sheets 11 arranged opposite to each other. Both side portions of the two body sheets 11 are similarly heat-bonded (these bonded portions are referred to as side seal portions 15) and surrounded by the body sheet 11 and the bottom sheet 12. After filling the space 16 (FIG. 2 (A)) with a low-viscosity content such as a liquid such as a detergent or a powder, the top portions of both body sheets 11 are heated and bonded so that the spout 14 can be formed. (This adhesive portion is referred to as the top seal portion 17). In this self-supporting packaging bag 10, the double-folded bottom sheet 12 is opened when the contents are filled so that the self-supporting packaging bag 10 can be self-supporting.

Here, the spout 14 has a dimension A in the width direction.
However, it is set to a size that allows the spout 14 to be suitably opened when the self-supporting packaging bag 10 is in use. Also, the same seat 1
Both 1 and the bottom sheet 12 are flexible seals.

Further, in the self-supporting packaging bag 10, a flow control sheet 18 is adhered to the inner surfaces of the pair of body sheets 11 near the spout 14. This flow control sheet 18
1B is a flexible seal, which is folded in two as shown in FIG. 1B, and its entire peripheral portion 19 is adhered to the inner surface of the body sheet 11 (this adhesive portion is referred to as the entire peripheral portion sealing portion 19A). Called). A throttle notch 20 is formed at the center of the flow rate control sheet 18. When the self-supporting packaging bag 10 is used, as shown in FIG. 3, the spout 14-side portion 20A of the drawing notch 20 approaches, and the entire circumferential portion 19-side portion 20B of the drawing notch 20 serves as a drawing hole as a drawing part. 21 (FIG. 3). When the self-supporting packaging bag 10 is used, the content in the self-supporting packaging bag 10 reaches the spout 14 through the throttle hole 21 formed in the flow rate control sheet 18, and is spouted from the spout 14.

The body sheet 11 is shown in FIG.
As shown in (B), the body sheet exterior film 11A and the body sheet interior film 11B are laminated with a laminating adhesive (not shown). The bottom sheet 12 also includes the bottom sheet exterior film 12A and the bottom sheet interior film 12B, and the flow rate control sheet 18
Also, the flow rate control sheet exterior film 18A and the flow rate control sheet interior film 18B are respectively laminated in the same manner as the body sheet 11. The body sheet exterior film 11A, the bottom sheet interior film 12B and the flow rate control sheet interior film 18B are resin films having heat resistance, and for example, biaxially oriented polyethylene terephthalate, biaxially oriented nylon or biaxially oriented polypropylene is preferable. Further, the body sheet interior film 11B, the bottom sheet exterior film 12A, and the flow rate control sheet exterior film 18A are resin films having heat fusion properties, and include, for example, low density polyethylene, medium density polyethylene,
Linear low density polyethylene is preferred. In particular, the body sheet interior film 11B is required to be made of a material having a high sealing property with respect to the contents.

The body sheet exterior film 11A, the bottom sheet interior film 12B and the flow rate control sheet interior film 18B have melting points of, for example, 200 ° C., and the body sheet interior film 11B, the bottom sheet exterior film 12A and the flow rate control sheet exterior film 18A. If the melting point of the body sheet is 100 ° C., for example, the body sheet 11 and the body sheet 11 and the bottom sheet 12, the body sheet 11 and the flow rate control sheet 18
At the time of heat-bonding each of the above, the body sheet interior film 11B of the pair of body sheets 11 is placed inside, and the bottom sheet 1
2 is folded in two with the bottom sheet exterior film 12A of the second side being outside, and is folded in two with the flow rate control sheet exterior film 18A of the flow rate control sheet 18 being outside, and the heating temperature is, for example,
If the temperature is 180 ° C., the body sheet interior films 11B are fused to each other, the body sheet interior film 11B and the bottom sheet exterior film 12A are fused, and the body sheet interior film 11B and the flow rate control sheet exterior film 18A are fused. Are fused together. At this time, the body sheet exterior film 11A, the bottom sheet interior film 12B and the flow rate control sheet interior film 18B are not thermally deformed, and their surface properties are maintained well.

A method of manufacturing the self-supporting packaging bag 10 as described above will be described together with a description of the self-supporting packaging bag manufacturing apparatus 30 shown in FIG.

The apparatus 30 for manufacturing the self-supporting packaging bag sequentially executes the raw fabric supply step 31, the bottom seal forming step 32, the side seal forming step 33, the cutting step 34, the filling step 35 and the top seal forming step 36. It is a thing. The bottom seal forming step 32 and the side seal forming step 33 may be interchanged in order.

In the raw fabric supply step 31, the bottom sheet raw fabric roll 37 supplies the bottom sheet raw fabric 38 in a folded state and the flow rate control sheet raw fabric roll 39 folds the flow rate control sheet raw fabric 40 in two folded states. The bottom sheet raw fabric 38 and the flow rate control sheet raw fabric 40 are sandwiched between the two body sheet raw fabric rolls 41 to supply the body sheet raw fabric 42.

Further, in the raw fabric supplying step 31, the punching hole punching machine 43 opens the punching holes 44 in the bottom sheet raw fabric 38, and the punching hole punching machine 45 punches the flow control sheet raw fabric 40. Open 46. These punch holes 44
And 46 are respectively punched in the bottom sheet raw fabric 38 and the flow rate control sheet raw fabric 40 at a pitch substantially the same as the widthwise dimension of the self-supporting packaging bag 10. The punched holes 46 in the raw material 40 of the flow rate control sheet are not always necessary.

In the bottom seal forming step 32, a bottom seal heating / bonding mechanism 47 and a bottom seal cooling mechanism 48 are provided. The bottom seal heat-bonding mechanism 47 includes a pair of upper and lower upper seal types and a lower seal type. The bottom seal cooling mechanism 48 also includes a pair of upper and lower upper seal types and a lower seal type. Bottom seal Heat-bonding mechanism 47 uses the upper seal type and the lower seal type to fold the bottom sheet original sheet 38 into the bottom sheet exterior film 12A.
And the body sheet interior film 11B of the two body sheet raw materials 42 are heated and pressed to adhere to each other.
The bottom seal portion 13 is formed as shown in FIG. The upper seal type and the lower seal type of the bottom seal cooling mechanism 48 cool the bottom seal portion 13 in a pressed state.

The side seal forming step 33 comprises a side seal heating / bonding mechanism 49 and a side seal cooling mechanism 50. The side seal heating and bonding mechanism 49 includes a pair of upper and lower upper seal types and a lower seal type. The side seal cooling mechanism 50 also includes a pair of upper and lower upper seal types and a lower seal type. With the upper seal type and the lower seal type of the side seal heating / bonding mechanism 49, the body sheet interior film 11B of the body sheet 42 of two body sheet 42
Are heated and pressed at a pitch of the width dimension of the self-supporting packaging bag 10 to be bonded, and the side seal portion 15 is formed as shown in FIGS. 1 (A) and 5 (B). The upper seal type and the lower seal type of the side seal cooling mechanism 50 cool the side seal portion 15 in a pressed state.

When the side seal portion 15 is formed, the portion corresponding to the side seal portion 15 in the original sheet 40 of the flow rate control sheet in the folded state (both ends 51 of the flow rate control sheet 18).
The flow control sheet exterior film 18A is adhered to the body sheet interior film 11B of the side seal portion 15 of the body sheet raw material 42 by the side seal heating / bonding mechanism 49 and the side seal cooling mechanism 50. At this time,
At the positions corresponding to the punch holes 46 of the flow rate control sheet raw material 40, the body sheet interior films 11B of both body portion sheet raw materials 42 are fused.

Further, when the side seal portion 15 is formed, the interior film 18B of both the trunk sheet raw fabrics 42 is formed at a position corresponding to the punch holes 44 of the bottom sheet raw fabric 38.
Self-supporting packaging bag 1 that is fused and manufactured in a later process
Independence is ensured by the both-body sheet 11 of 0.

The cutting step 34 shown in FIG. 4 is provided with a pair of cutter blades 52 which come in contact with and separate from each other in the vertical direction.
2, the bottom sheet raw material 42, the bottom sheet raw material 38, and the flow rate control sheet 40, in which the bottom seal portion 13 and the side seal portion 15 are formed, are integrated, the side seal portion 15 and the punch holes 29, 44. Is cut so as to be divided into two, and a plurality of self-supporting packaging bags 10 are formed.

In the filling step 35, the low-viscosity contents 56 such as fluid and powder are injected into the self-supporting packaging bag 10 formed as described above from the filling nozzle 53 shown in FIG. 5 (C). Then fill. At this time, in the self-supporting packaging bag 10 carried into the filling step 35, only both end portions 51 of the flow rate control sheet 18 are adhered to the side seal portions 15 of the body sheet 11 and the flow rate control sheet 18 in the folded state. Since the opening 54 is formed between the inner surfaces of both body sheets 11,
The contents 56 from the filling nozzle 53 are filled into the self-supporting packaging bag 10 through the opening 54.

In the top seal forming step 36, the tops of both body sheets 11 in the self-supporting packaging bag 10 are adhered by fusing the body sheet interior film 11B,
The top seal portion 17 is formed (FIG. 5 (D)). At this time, the spout 14 is formed in the top seal portion 17. At the same time as the formation of the top seal portion 17, or before and after that,
The flow rate control sheet exterior film 18A in the entire circumference portion 19 of the flow rate control sheet 18 is fused to the body sheet interior film 11B of both body portion sheets 11 to form the whole circumference portion seal portion 19A.
Is formed to close the opening 54. In this way, the self-supporting packaging bag 10 is manufactured.

When using the self-supporting packaging bag 10, as shown in FIG.
The top seal part 17 of the self-supporting packaging bag 10 is cut along the cutting line 55 shown in FIG. When the user tilts the self-supporting packaging bag 10, the flow rate of the contents in the self-supporting packaging bag 10 is controlled through the throttling hole 21 formed in the throttling notch 20 of the flow rate control sheet 18, and Exit 14
Is poured out from.

According to the above embodiment, the self-supporting packaging bag 1
At 0, on the inner surface of the body sheet 11 arranged oppositely,
The flow control sheet 18 having the notch 20 for drawing is adhered, and the contents are formed in the notch 20 for drawing.
Since it flows to the spout 14 through the flow path, the flow rate of the content, particularly the low-viscosity content, is controlled by the throttle hole 21 of the flow rate control sheet 18 in a state where the spout 14 is appropriately opened and held, and the flow rate is excessively increased. It can be poured out from the spout 14 without flowing out. Further, the flow rate control sheet 18 is made of the same material as the body sheet 11 and the bottom sheet 12, so that the cost is low. For these reasons, the low-viscosity contents can be satisfactorily poured out at low cost.

Before the contents are filled, only both end portions 51 of the flow rate control sheet 18 are adhered to the both body sheet 11, and a large opening 54 is provided between the flow rate control sheet 18 and the both body sheet 11. As a result, the contents flow into the opening 54 and fill the self-supporting packaging bag 10. Therefore, despite the existence of the flow rate control sheet 18, the contents can be easily filled into the self-supporting packaging bag 10.

6A to 6G respectively show first to seventh modified examples of the flow rate control sheet of FIG. 1B.
FIG. 6H is a development view of the flow rate control sheet of FIG. FIG. 7: is a partial cross section figure which shows the 8th modification of the flow control sheet of FIG. 1 (A) mounted in the self-supporting packaging bag. FIG. 8: is a partial cross section figure which shows the 9th modification of the flow control sheet of FIG. 1 (B) in the state mounted in the self-supporting packaging bag.

The flow control sheet 60 of FIG. 6 (A) has a notch 61 for throttling and a throttling hole 62 formed separately as throttling portions, and is mainly used when the self-supporting packaging bag 10 is used. The contents flow through.

The flow control sheet 63 shown in FIG. 6B is formed with a notch 64 for throttling having a large opening area as a throttling portion. When the self-supporting packaging bag 10 is used, the notch 6 for throttling is formed.
The entire circumference 19 side of 4 is opened.

Further, the flow rate control sheet 65 of FIG.
Is a notch 6 for throttling of the flow control sheet 60 as a throttling portion.
The first diaphragm notch 66 having the same shape as that of No. 1 and the second diaphragm notch 67 provided to face the first diaphragm notch 66 are provided, and when the self-supporting packaging bag 10 is used, The content mainly flows through the second notch 67.

In the flow rate control sheet 68 of FIG. 6D, the throttle notch 69 has the same shape as the throttle notch 20 of FIG. 1, but the entire peripheral portion 70 is formed in a V shape in side view. is there.

The flow rate control sheets 71, 72 of FIGS. 6 (E) and 6 (F) have a plurality of slits 73 formed therein, and these slits 73 are used when the self-supporting packaging bag 10 is used.
Is opened and functions as a diaphragm.

The flow rate control sheet 74 of FIG. 6G is shown in FIG.
As shown in (H), one side of the folded state is two triangular pieces 75 and the other side is a square piece 76, and the space surrounded by the triangular pieces 75 and the square pieces 76 is narrowed. It is a part.

The flow rate control sheet 77 shown in FIG. 7 is obtained by folding the two sides of the rectangular flow rate control sheet 77 in the unfolded state and forming a throttle hole 78 as a throttle portion in the central portion.

The flow rate control sheet 79 of FIG. 8 is obtained by dividing the flow rate control sheet 77 (FIG. 7) into two parts on the left and right sides in the figure, and forming a throttle hole 80 as a throttle part at the center.

In each of the modified examples of the flow rate control sheet described above, the same operation and effect as the flow rate control sheet 18 of the above-described embodiment can be obtained.

[0042]

As described above, according to the self-supporting packaging bag of the present invention, the low-viscosity contents can be satisfactorily poured out at low cost, and the self-supporting packaging bag of the present invention can be manufactured. According to the method, the contents can be easily filled in the self-supporting packaging bag.

[Brief description of drawings]

FIG. 1 (A) is a front view showing a cutaway part of an embodiment of a self-supporting packaging bag according to the present invention.
FIG. 1B is a perspective view showing the flow rate control sheet of FIG.

2A is a cross-sectional view taken along the line IIA-IIA in FIG. FIG. 2B is an enlarged cross-sectional view of the IIB portion of FIG.

FIG. 3 is a perspective view of the self-supporting packaging bag shown in FIG. 1 (A), in which the self-supporting packaging bag is filled with contents and is in use.

4 (A) is a plan view showing a facility for manufacturing a self-supporting packaging bag for carrying out one embodiment of a method for manufacturing the self-supporting packaging bag for manufacturing the self-supporting packaging bag of FIG. 1 (A). It is a figure. FIG. 4B is an enlarged sectional view of the IVB portion in FIG.

5 is a configuration diagram showing a self-supporting packaging bag filled with contents manufactured by the self-supporting packaging bag manufacturing facility of FIG. 4 (A).

6 (A) to (G) show first to seventh modified examples of the flow rate control sheet of FIG. 1 (B), respectively, and FIG. 6 (H).
FIG. 7 is a development view of the flow rate control sheet of FIG.

FIG. 7 is a partial cross-sectional view showing an eighth modified example of the flow rate control sheet of FIG. 1 (A) in a state where it is mounted on a self-supporting packaging bag.

FIG. 8 is a partial cross-sectional view showing a ninth modified example of the flow rate control sheet of FIG. 1 (B) in a state in which it is attached to a self-supporting packaging bag.

FIG. 9 is a front view showing a first conventional self-supporting packaging bag.

[Explanation of symbols]

 10 Self-supporting packaging bag 11 Body sheet 12 Bottom sheet 13 Bottom seal part 14 Pouring outlet 15 Side seal part 17 Top seal part 18 Flow control sheet 19 Whole circumference of flow control sheet 20 Throttling notch 21 Throttling hole 51 Flow control Both ends of the sheet 54 Aperture formed by the flow rate control sheet and the body sheet

Claims (2)

[Claims] 1. A flexible bottom sheet is adhered to the bottom of the body sheet so that the flexible bottom sheet can be expanded. In a self-supporting packaging bag formed by adhering the top part of the above so that a spout can be formed, a flexible flow rate control sheet having a squeezing part is adhered to the inner surfaces of both the body parts sheets, A self-supporting packaging bag, characterized in that it is configured to flow to the spout through the narrowed portion. 2. After the bonding of both side portions of a pair of body sheets that are opposed to each other and the bonding of the bottom sheet to the bottom of the body sheet, the contents are transferred from the top of the body sheet. In the method for producing a self-supporting packaging bag, in which the top portion of the body sheet is adhered to produce a self-supporting packaging bag, at the same time when both side portions of the copper sheet are adhered, both ends of the flow control sheet are Parts are adhered to both the side parts of the body sheet, the contents are filled, and then the entire peripheral portion of the flow rate control sheet is adhered to the inner surface of the upper sheet, thereby producing a self-supporting packaging bag. Method.