WO2002060773A1

WO2002060773A1 - Plastic bag with zippered small bag

Info

Publication number: WO2002060773A1
Application number: PCT/JP2002/000461
Authority: WO
Inventors: Akira Ishizaki
Original assignee: Ishizaki Shizai Co.,Ltd.
Priority date: 2001-02-01
Filing date: 2002-01-23
Publication date: 2002-08-08
Also published as: CN1455750A; JP3676692B2; JP2002302132A; CN1210187C

Abstract

A bag having a zippered nozzle-shaped small bag of a plastic film installed at the fused portion of a large bag formed by fusing the plastic film, wherein a fusion obstructing treatment is applied to the inner surface of the small bag to prevent the inner surface of the small bag from being fused before the small bag is fused to the fused portion of the large bag, the small bag is pulled out to the outside of the large bag in the state of being inverted by, for example, inserting fingers thereinto and grasping the inner surface thereof, the tip part of the pulled out small bag is cut out to form an outlet and contents are taken out from the outlet and, after the necessary amount of the content is taken out, the outlet is closed properly with a clip and pressed into the small bag, and then the zipper is closed.

Description

Description Plastic bag with zippered pouch

The present invention relates to a plastic bag, and more particularly to a plastic bag provided with a zippered nozzle-like pouch. Background art

Various plastic bags have been provided in which an opening is provided with a zipper comprising a pair of concave and convex portions so that the opening can be securely closed. This kind of bag is filled with various things, but it contains liquids (powder, gel, sticky, oils, synthetic paste, ink, paint, etc.) in a resealable manner. A plastic bag with a zipper is preferred.

However, securing a single zipper and sealing it over the entire width of the opening on one side of the large plastic bag requires advanced technology and extensive equipment. Even if the zipper is welded and hermetically sealed, it is inconvenient to remove the fluid since the entire side is open. In addition, there is also a problem that the fluid is clogged in the zipper.

Therefore, an object of the present invention is to provide a plastic bag which can easily take out a fluid even if it is a large plastic bag, can be easily resealed, and does not clog the zipper with the fluid. To provide bags. Disclosure of the invention

In order to achieve the above object, the present invention provides a large bag for accommodating a flowable material formed by welding a plastic film, A plastic bag comprising a nozzle-shaped small bag made of a plastic film provided with a zipper formed of a concave portion and a convex portion, wherein the small bag has a peripheral portion other than a tip end protruding from the large bag. It is welded or folded back, a zipper is provided inside the vicinity of the front end, and a welding inhibition treatment is applied to the inner surface of the plastic film of the small bag.

In the plastic bag according to the present invention having the above-described configuration, first, the small bag that has been welded and inserted into the film-welded portion of the large bag is turned over and protrudes outside the large bag. For example, the large bag is pressed from the outside and the small bag is pushed out by the internal pressure, or a finger is inserted inside the small bag to extract it. By cutting off the tip of the small bag protruding outside the large bag in this way, a substantially cylindrical (nozzle-shaped) outlet is formed. The fluid contained in the large bag in advance is to be removed from this outlet, and the zipper provided inside the small bag is hidden by the pulled-out film and does not touch the fluid to be removed. Par is not clogged.

After taking out the required amount of fluid, close the outlet with a clip or the like, push it into the large bag again, and close the zipper of the small bag to keep the large bag tightly closed. .

In addition, the sachet can be formed in a tapered funnel shape, and a small opening can be obtained. Therefore, it is possible to use a small opening like a straw to drink the beverage, and the small bags are stored in the large bags, so they are clean. As mentioned above, large-scale equipment is required to securely attach a zipper to a large plastic bag, but large-sized bag-making equipment without a zipper is installed at most plastic bag-making manufacturers. . In addition, small bags with zippers are widely used, and there are many bag makers that install the bag making equipment. The present invention provides a large bag without zipper It is a combination of a small bag with a zipper and can be easily mass-produced by combining existing bag making equipment.

Furthermore, although the small bag is welded to the large bag, the inner surface of the small bag is not welded because the inner surface is subjected to the welding inhibition treatment, so that the small bag can maintain a nozzle shape. BRIEF DESCRIPTION OF THE FIGURES

FIG. 1 is a front view showing a plastic bag according to an embodiment of the present invention, FIG. 2A is a plan view showing a small bag provided in the plastic bag, FIG.

FIG. 3 is a cross-sectional view showing a zipper provided in the pouch,

4A and 4B are explanatory diagrams showing the first stage of use,

Fig. 5A, Fig. 5b is an explanatory diagram showing the second stage of use,

FIG. 6A and FIG. 6B are explanatory diagrams showing the third stage of use,

FIG. 7A and FIG. 7B are explanatory diagrams showing the fourth stage of use,

FIG. 8A and FIG. 8B are explanatory diagrams showing a fifth stage of use. BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, an embodiment of a plastic bag according to the present invention will be described with reference to the accompanying drawings.

FIG. 1 shows a plastic bag 10 according to an embodiment of the present invention. The bag 10 is composed of a large bag 11 made of a plastic film and a small bag 21 having a nozzle shape. Large bag 1 1 is a bag made as a conventionally known welding bag. One raw film is folded into two, or two raw films are overlapped. The sides are welded (the A, B, C, and D parts shown by diagonal lines in Fig. 1). The lower part D is large. It is welded after the bag 11 is filled with the fluid.

The small bag 21 is inserted and welded between the films at the upper side welded portion C of the large bag 11 and, as shown in FIGS. 2A and 2B, two heat-sealable plastic films 22 and 22 Are welded (shown by oblique lines) at both sides E 1, E and end F to form a bag. One end of the pouch 21 is formed as an opening 23, and a zipper 30 is provided inside the opening 23 in advance. The zipper 3 0, as shown in FIG. 3, the base unit 3 1, 3 1 and the recess 3 2 and _t the pouch 2 1 is well known molded integrally with the projections 3 3 at the respective extrusion Is inserted into the upper welded portion C of the large bag 11 between the plastic films 12 and 12 of the large bag 11 as shown in Figs. 4A and 4B, with one end protruding. Welded to. During this welding, the outer surface of the film 22 and the inner surface of the film 12 are welded. The inner surface of the film 22 is subjected to a welding inhibition treatment so that the inner surface of the film 22 is not welded. The welding inhibition treatment can be easily performed by providing the welding inhibition layers 24 and 24 (see FIGS. 2A and 2B). Although various materials can be used for the welding inhibition layer 24, for example, it is preferable to form the heat-resistant ink by gravure printing.

As another example of the welding inhibition treatment, the pouch 21 may be composed of a laminate film or a two-layer co-extruded film. The outside film is a film with a low heat welding temperature (for example, polyethylene film), and the inside is a film with a high heat welding temperature (for example, a polypropylene film). The welded portions E and F of the pouch 21 adhere to the inner film The welding is performed at a high temperature, and the welding portions A, B, C, and D of the large bag 11 are welded at a low temperature. By such a process, it is possible to obtain a small bag 21 whose inner surface is not welded. When the small bag 21 is welded to the large bag 11, a non-welded piece (for example, a thin iron plate or a plastic plate) may be inserted between the films 22 of the small bag 21 to prevent welding. In particular, the zipper 30 The base portion 31 can be extended to be used as a welding inhibition film.

The bag 10 having the above-described configuration is used as a bag for accommodating fluids such as, for example, powders, gels, viscous materials, oils, synthetic paste, ink, and paint. The bag 10 is shipped from a bag maker in a state where the lower side D is not welded, and the lower side D is welded after the flowable material is filled. In the bag making process, a small bag 21 is manufactured in advance, and a process of inserting and welding the small bag 21 between the raw films constituting the large bag 11 is added, so that the existing bag making equipment can be installed. It can be used as is.

When the user removes the contained fluid, first open the zipper 30 of the pouch 21 shown in FIGS. 4A and 4B and put a finger in the pouch 21.揷 Put the pouch 2 1 outside with the inside of the pouch 21 picked up. At this time, the pouch 21 is pulled out through the zipper 30 while being turned upside down (see FIGS. 5A and 5B). In addition, the large bag 11 can be pressed to push the small bag 21 to the outside by the internal pressure.

Next, the protruding tip portion of the pouch 21 is cut at the dashed-dotted line G shown in FIGS. 5A and 5B to form a takeout opening 26 (see FIGS. 6A and 6B). ). The fluid in the large bag 11 can be taken out from the opening 26. If a necessary amount of fluid is taken out, the opening 26 is appropriately cleared as shown in FIGS. 7A and 7B. Close with zipper 27, push this clip 27 into large bag 11 and close zipper 30 (see FIGS. 8A and 8B). As described above, when the pouch 21 is turned upside down and pulled out or extruded into a cylindrical shape to take out the fluid, the fluid does not come into contact with the zipper 30. Therefore, there is no possibility that the zipper 30 is clogged by the fluid.

As shown in Fig. 2A, sachet 21 has three sides welded together. However, a single film may be folded back at the welded portion F or a film may be folded back at the opening 23. When the film is folded back at the opening 23 to form the pouch 21, the opening 23 must be cut with a dashed-dotted line G (see FIG. 2A) during use. In addition, even in the small bag 21 shown in FIG. 2A, the opening 23 may be welded in advance, and in this case as well, the opening 23 is cut when used. .

The plastic bag according to the present invention is not limited to the above embodiment, but can be variously modified within the scope of the gist.

In particular, the detailed configuration and manufacturing process of the large bag / small bag are arbitrary, and the position where the small bag is attached is also arbitrary. Further, the zipper may be of various configurations, and a zipper having higher tightness may be used.

Claims

Scope of the request 1. A large bag for accommodating a fluid formed by welding a plastic film, and a zipper welded to the film-welded portion of the large bag and composed of a concave portion and a convex portion are provided. A plastic bag consisting of a nozzle-shaped small bag made of a plastic film and

The small bag is welded or folded around a portion other than the tip protruding from the large bag, a zipper is provided inside the vicinity of the tip, and a welding inhibition treatment is performed on the inner surface of the plastic film of the small bag. Being a plastic bag.