JPH0717737U - Standing pouch - Google Patents

Abstract

(57) [Summary] (Correction) [Purpose] To provide a standing pouch that allows the contents to be easily poured or squeezed out and a simple stopper to be inserted for resealing. A standing pouch in which a member that contracts so as to give a substantially circular cross-section to the opening of the bag before, during, or after filling the contents is provided.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a structure of an opening portion of a bag generally called a standing pouch that can be stably stood upright by filling the bottom with a boat-like shape when filled with contents such as food, detergent and medicine as shown in FIG. .

[0002]

[Prior art]

 The conventional standing pouch (Fig. 2) has a flat shape in a bag-making state, but when filled with an article, the whole becomes cylindrical and the bottom spreads into a boat shape so that it can be stood upright. Especially when packaging a liquid or pasty material, the weight is applied vertically to the bottom surface and becomes stable (Fig. 2d). The upper part is sealed in a flat shape, and when the contents are taken out, the corners of the bag are generally cut diagonally, so the cut surface is naturally straight. Therefore, even if the standing pouch is tilted, the opening is easily closed linearly due to the resilience of the plastic film, and it is difficult to smoothly pour out or squeeze out the contents. As described above, the conventional standing pouch (Fig. 2) is not a satisfactory substitute for bottles, containers, etc., and leaves room for improvement in various aspects.

[0003]

[Problems to be solved by the device]

 In the conventional technology, when the upper part of the bag is cut diagonally and the contents are poured out or squeezed out, due to the blocking phenomenon that occurs due to the resilience of the plastic film, the opening is linearly closed and the viscosity of the contents is low. However, various problems such as falling down on the outer wall surface of the bag and conversely, it is difficult to squeeze out when the viscosity is high occur. Also, when resealing the cut opening of the bag, it is necessary to bend the opening and pinch it by some method or tie it with a string-like object.

Under the circumstances, the present invention eliminates the clogging phenomenon of the opening caused by the resilience of the plastic film, makes it easy to take out the contents, and secures the cutting opening of the bag. It is an object of the invention to provide an improved standing pouch which can be provided with a plug at its opening for sealing to the.

[0005]

[Means for Solving the Problems]

 As a result of diligent study, the present inventor has found that the plastic film that is generated when the upper part of the bag is diagonally cut out and the contents are poured or squeezed out or when a simple stopper is inserted for resealing. The inventors have found that it is effective to dispose a shrinkable member that acts against the blocking phenomenon due to resilience inside the opening of the bag, and completed the present invention. That is, the gist of the present invention is a standing pouch having a member inside which contracts so as to maintain the cross section of the opening of the bag to have a substantially circular shape before, during, or after filling the contents. .

In the standing pouch according to the present invention, it is important that the contracting member is arranged inside the opening, and other structures and the like are not particularly limited. The contracting member contracts inside the opening of the pouch before, during, or after filling the contents, and resists the force of returning the pouch to its original folded state at that time. It acts in the direction in which the pouch expands (expands). As a result, the cross-sectional shape of the pouch opening is maintained from a boat shape to a substantially circular shape. The contraction member can be disposed at an appropriate place in the opening in the pouch, that is, in the content take-out section.

The contraction member can be contracted at the time of filling the contents or after the contents are filled with, for example, a hot plate, hot air, steam, hot water, or heat of the filling itself. As described above, the shrinkable member used in the present invention is preferably a heat-shrinkable material, but in addition, a polyurethane fiber having a water-absorbing shrinkage property, a polybutylene film having a rubber elasticity, or the like can also be used. Specific preferred examples of the heat-shrinkable film will be given below.

[0008]

[Table 1]

In addition to the above examples, a coextruded longitudinally uniaxially stretched heat shrink film and a coextruded biaxially stretched heat shrink film can also be used. The shrinkage of the shrink material naturally affects the cross-sectional shape of the opening of the standing pouch, as shown in FIGS. Although it depends on the material and size used, in the present invention, the shrinkage rate is preferably 10 to 35% as the cross-sectional shape of the opening. Furthermore, 30 to 35% is more preferable. 3 and 4 show the relationship between the shrinkage rate of the shrinkable material and the cross-sectional shape of the opening of the pouch. The numbers on the right side are the shrinkage rates.

[0010]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. 1A and 1B show an embodiment in which a heat-shrinkable film 2 as a shrinkable member is arranged inside the opening 3 of the pouch body 1, FIG. 1A is a front view, and FIG. 1B is a line AA in FIG. Sectional explanatory drawing, (c) is the same BB line sectional explanatory drawing. Further, (d) is a perspective view when the heat-shrinkable film 2 is shrunk, and the opening has a substantially circular cross section. In this case, as shown in FIG. 5, a plug 5 may be provided to reseal. it can. (E) is CC line sectional explanatory drawing in (d). In FIG. 1, reference numeral 4 denotes a gore folded in the bottom of the Paum body 1.

[0011]

[Effect of device]

 As described above, according to the present invention, the contracting member is provided inside the opening, and by contracting the contracting member, the opening of the standing pouch can be expanded into a substantially circular shape, and the contents can be taken out and squeezed out. It is easier and the opening can be plugged to reseal.

[Brief description of drawings]

FIG. 1 is an explanatory view of an embodiment of the present invention, (a) is a plan view,
(B) is a sectional view taken along line AA of (a), and (c) is B of (a).
-B line sectional view, (d) is a perspective view when the contracting member is contracted, (e) is a CC line sectional view of (d).

FIG. 2 is an explanatory view of a conventional standing pouch,
(A) is a plan view, (b) is a sectional view taken along line AA of (a),
(C) is a sectional view taken along the line BB of (a), and (d) is a perspective view when the contents are filled.

FIG. 3 is an explanatory view of the relationship between the shrinkage rate of the shrinkable material and the cross-sectional shape of the pouch.

FIG. 4 Same as above.

FIG. 5 is an explanatory diagram for resealing the opening of the standing pouch.

Front page continuation (72) Yukuri Yuri, 5-4-5 East Coast North, Chigasaki City, Kanagawa Prefecture (72) Akira Nishi, 75 Morimaki-cho, Moriyama-ku, Nagoya

Claims (1)

[Scope of utility model registration request] 1. A standing pouch comprising a member that contracts so as to maintain the cross section of the opening in a substantially circular shape before, during, or after filling the contents.