CN102991828B - In-barrel bag for packaging liquid food - Google Patents

Abstract

The invention discloses a bag-in-drum for liquid food packaging, which comprises a bag body, a bag neck and a bag mouth. The two ends of the bag neck are heat-sealed and connected with the bag body and the bag mouth hanging on the mouth of the barrel respectively. After filling, it can be sealed with induction aluminum film. The bag-in-bucket for liquid food packaging provided by the invention is folded into a flat strip shape, can be unfolded in an orderly manner during the filling process, and effectively utilizes the volume of the outer barrel. The mouth of the plastic bag is not only firm, but also ensures smooth pouring of the liquid. The empty bag is easy to take out. Finally, ensure that the liquid food in the bag does not contact the outer barrel, which meets the food packaging requirements.

Description

Bag-in-drum for liquid food packaging

technical field

The invention relates to a packaging product, in particular to a bag-in-drum for liquid food packaging.

Background technique

There are many forms of liquid packaging containers, but they are basically divided into two types: rigid packaging and flexible packaging. Rigid packaging containers have a high recycling value. To meet food packaging requirements, the cleaning process takes a lot of time and costs. In practice, some unscrupulous manufacturers sometimes cut corners or even do not clean during the cleaning process out of selfish interests, which directly affects the safety of food and endangers the health of consumers. For example, adding a disposable inner bag that meets the requirements of food packaging in the barrel can not only meet the hygienic standards, but also dispel many concerns of consumers, and at the same time facilitate the supervision and inspection of government functional departments. The diameter of the blow molding barrels generally recycled in the domestic market is about a few centimeters. If the inner bag is placed in the barrel, that is, the bag in the barrel, the bag in the barrel is not easy to unfold smoothly during the filling process; it is easy to twist in the barrel; Maximize the use of the volume of the outer barrel; the liquid is not poured out smoothly. In addition, the connection between the bag body and the mouth of the bag hanging on the mouth of the barrel is easily damaged, resulting in broken bags.

In order to meet the needs of production-oriented enterprises, the bag-in-drum, as a new packaging form, must solve the above-mentioned defects.

Contents of the invention

The invention provides a bag-in-bucket for liquid food packaging. The bag body can be conveniently inserted into the mouth of the outer barrel, and can be unfolded in an orderly manner during the filling process, effectively utilizing the volume of the outer barrel. The mouth of the plastic bag is not only firm, but also ensures that the liquid The outlet is smooth, and the empty bag is easy to take out. Finally, it is ensured that the liquid food in the bag does not touch the outer barrel, which meets the safety requirements of food packaging.

The technical solution adopted by the present invention to solve the above technical problems is to provide a bag-in-drum for liquid food packaging, which includes a bag body, a bag neck and a bag spout, and the bag body is composed of two single-sided heat-sealable The plastic is folded and heat-synthesized into a bag; wherein, the middle of the upper bottom edge is pinched and ironed to the bag neck;

The aforementioned bag-in-drum for liquid food packaging, wherein, before the bag body is heat-synthesized, the upper and lower plastic films are folded at least twice.

The aforementioned bag-in-drum for packaging liquid food, wherein, the bag body is heat-synthesized along the outer edge of the octagon.

The aforementioned bag-in-drum for packaging liquid food, wherein, the neck of the bag is made of two double-sided heat-sealable films that are heat-sealed on both sides.

The aforementioned bag-in-drum for packaging liquid food, wherein spaced bosses are provided on the contact surface between the mouth of the bag and the mouth of the outer barrel.

In the aforementioned bag-in-drum for packaging liquid food, the upper end of the bag spout is an annular plane for induction aluminum film sealing after filling.

The above-mentioned bag-in-drum for liquid food packaging, wherein, after the heat-sealing bag making is completed, the bag body is folded horizontally and vertically into flat strips, stacked and fixed.

In the aforementioned bag-in-drum for packaging liquid food, the width of the bags stacked in flat strips is smaller than the outer diameter of the bag mouth (16).

The present invention has the following beneficial effects: the liquid food packaging bag-in-drum provided by the present invention is folded by two plastic films with single-sided heat-sealing performance, and then heat-synthesized into the bag, which is folded horizontally and vertically into a flat strip The bag body can be easily inserted into the mouth of the outer barrel, and the bag body is unfolded in an orderly manner during filling to make full use of the volume of the outer barrel. When filling, the folded edge of the plastic film near the mouth of the bag is released naturally, and the neck structure of the bag that can decompose the stress effectively reduces the pulling force on the mouth of the bag hanging on the mouth of the barrel. During the impact test, the anti-destructive performance is greatly improved. By setting spaced bosses on the contact surface between the mouth of the bag and the mouth of the barrel, it is used as a channel for the gas in the barrel to escape during filling, and also as a channel for returning air to the barrel when the liquid is poured out. This channel is far away from the outlet of the mouth of the bag. The liquid port prevents the outflowing liquid from being brought into the bucket by the return air. The upper end of the bag spout is an annular plane used for induction aluminum film sealing after filling, so that the bag spout cannot be sealed again after use, and the refilling of the bag in the bucket is prevented.

Description of drawings

Fig. 1 is the unfolded view of the top sheet plastic film that forms the liquid food packaging bag-in-drum;

Fig. 2 is the unfolded view of the lower plastic film forming the bag-in-drum for liquid food packaging;

Fig. 3 is the shape diagram of the bag-in-barrel for liquid food packaging provided by the present invention;

Fig. 4 is the plan view that the interlayer of the bag-in-drum for liquid food packaging provided by the present invention is unfolded in a non-filled state;

Figure 5 is a sectional view of the bag-in-drum for liquid food packaging provided by the present invention in a non-filled state;

Figure 6 is a side view of the bag-in-drum for liquid food packaging provided by the present invention in a filled state;

Fig. 7 is a front view of the bag-in-drum for packaging liquid food provided by the present invention in a filled state;

Fig. 8 is the shape diagram of the bag neck of the bag-in-barrel for liquid food packaging provided by the present invention;

Fig. 9 is the front view of the spout of the bag-in-barrel for liquid food packaging provided by the present invention;

Fig. 10 is the bottom view of the mouth of the bag-in-barrel for liquid food packaging provided by the present invention;

Fig. 11 is a top view of the spout of the bag-in-barrel for packaging liquid food provided by the present invention.

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

Fig. 1 is the unfolded view of the upper plastic film forming the liquid food packaging bag-in-drum, Fig. 2 is the expanded view of the lower plastic film forming the liquid food packaging bag-in-drum, and Fig. 3 is the liquid food packaging provided by the present invention With the shape diagram of the bag in barrel, Fig. 4 is a plane view of the interlayer unfolded under the non-filled state of the liquid food packaging bag in barrel provided by the present invention, and Fig. 5 is the non-filled state of the liquid food packaging bag in barrel provided by the present invention Figure 6 is a side view of the bag-in-barrel for liquid food packaging provided by the present invention in a filled state, and Figure 7 is a front view of the bag-in-barrel for liquid food packaging provided by the present invention in a filled state, Fig. 8 is the shape diagram of the neck of the bag-in-barrel for liquid food packaging provided by the present invention, Fig. 9 is the front view of the mouth of the bag-in-barrel for liquid food packaging provided by the present invention, and Fig. 10 is the liquid food provided by the present invention The top view of the spout of the bag-in-drum for food packaging, Fig. 11 is the top view of the spout of the bag-in-drum for liquid food packaging provided by the present invention. In the figure, side 1, lower bottom 2, hypotenuse 3, upper bottom 4, side 5, hypotenuse 6, hypotenuse 7, hypotenuse 8, folded edge 9, folded edge 10, folded edge 11, Flange 12, flange 13, flange 14, bag neck 15, bag spout 16, boss 17, annular plane 18. Among them: there are two sides, namely side 1 and side 5, and four hypotenuses, namely hypotenuse 3, hypotenuse 6, hypotenuse 7, and hypotenuse 8.

Please refer to the above-mentioned drawings, the bag-in-drum for liquid food packaging provided by the present invention, which includes a bag body, a bag neck 15 and a bag spout 16, and the bag body is made of two plastic films with single-sided heat-sealing performance The last sheet of plastic film is folded twice, that is, formed by folding 9 and folding 10, and the dotted line 9 and 10 shown in Fig. 1 are the positions of the folding. Following sheet plastic film is through four times of flanging, namely by flanging 11, flanging 12, flanging 13, flanging 14 forming, and dotted line 11,12,13,14 shown in Fig. 2 is the position of flanging. Two pieces of plastic film are thermally synthesized along the outer edge of the octagonal bag body. The sides 1, 5 and the beveled sides 3, 6, 7, and 8 of the upper and lower plastic films are heat-sealed and ironed. In addition, the lower bottom 2 and the upper bottom 4 are heat-sealed respectively, and the upper bottom 4 is heat-sealed. When pressing the bag neck 15 in the middle, the bag neck 15 is positioned at the middle position of the upper bottom edge 4. Specifically: side 1 and side 5 shown in Fig. 1 are heat-sealed and ironed with side 1 and side 5 shown in Fig. 2 respectively; hypotenuses 3, 6, 7 and 8 shown in Fig. The hypotenuses 3, 6, 7, and 8 shown in 2 are heat-sealed and ironed. The bag-in-drum for liquid food packaging provided by the present invention is heat-synthesized by two pieces of plastic film with single-sided heat-sealing performance after folding, so that the bag body can be fully unfolded after filling, and the volume of the outer barrel can be effectively utilized.

The neck 15 of the bag protrudes from the bag body and is thermally sealed with the mouth 16 of the bag. Before the bag body of the bag-in-drum for liquid food packaging is heat-synthesized, the upper and lower plastic films are folded at least twice, and the bag body is formed along eight edges. The outer edge of the edge is heat-synthesized. The bag neck 15 is made by heat-sealing on both sides of two films with double-sided heat-sealing properties.

The bag neck 15 is formed by heat-synthesizing two sides of the film with double-sided heat-sealing properties. The upper part is rectangular and the lower part is trapezoidal. The two films can be opened. The upper part of the bag neck 15 is connected with an injection-molded bag spout 16, the bag spout 16 is wrapped by the bag neck 15, and the bag spout 16 and the bag neck 15 are connected by hot pressing. Spaced bosses 17 are provided on the contact surface between the bag spout 16 and the mouth of the outer barrel. The upper end of the bag spout 16 is an annular plane 18 for induction aluminum film sealing after filling. By setting spaced bosses 17 on the contact surface between the bag spout 16 and the mouth of the barrel, it serves as a channel for the gas in the barrel to escape during filling, and also as a channel for returning air to the barrel when pouring out the liquid. This channel is far away from the bag. Mouth 16 liquid outlets, avoid flowing out liquid and be brought in the barrel by returning air. The upper end of the bag spout 16 is an annular flat surface 18 for induction aluminum film sealing after filling, so that the bag spout 16 cannot be sealed again after use, preventing the bag-in-bucket from being filled again.

After the heat-sealing bag making is completed, the bag body is folded horizontally and vertically into flat strips, so that the bag body can be easily inserted into the mouth of the outer barrel, and the bag body is unfolded in an orderly manner during filling, making full use of the volume of the outer barrel. This process is an integral part of bag-in-bucket products. Including the following steps:

Step 1: Spread the bag-in-bucket semi-finished product after the heat-sealing bag making in the state that the upper piece of plastic film is on top and the lower piece of plastic film is on the bottom.

Step 2 (horizontal folding): Fold the lower bottom edge (2) of the bag-in-bucket with the folded edge (14) as the axis, and fold it up 180° to the neck (15) end of the bag.

Step 3 (longitudinal): Fold the material on the left and right sides of the central axis of the bag body where the neck (15) is located to the central axis several times, until the width of the two wings of the folded bag body is smaller than that of the mouth (16) path. Finally, the two wings are folded 90° around the central axis, folded into flat strips and fixed to form a finished bag-in-bucket.

Although the present invention has been disclosed above with preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art may make some modifications and improvements without departing from the spirit and scope of the present invention. Therefore, the present invention The scope of protection should be defined by the claims.

Claims (4)

1. A bag-in-drum for liquid food packaging, comprising a bag body, a bag neck and a bag spout, characterized in that: the bag body is heat-synthesized by two plastic films with single-sided heat-sealing properties after folding; Wherein the middle of upper base (4) pinches described bag neck (15); Described bag neck (15) stretches out bag body and is connected with described bag spout (16); Folding forming; the bag body is heat-synthesized along the outer edge of the octagon; the bag body after heat-sealing bag making is folded horizontally and vertically and then folded into flat strips and fixed; The width of the bag body is smaller than the outer diameter of the bag mouth (16). 2. The bag-in-drum for liquid food packaging according to claim 1, characterized in that: the bag neck (15) is made of two double-sided heat-sealable films heat-bonded on both sides. 3. The bag-in-drum for liquid food packaging according to claim 1, characterized in that: interval bosses (17) are provided on the contact surface between the mouth of the bag (16) and the mouth of the outer barrel. 4. The bag-in-drum for liquid food packaging according to claim 3, characterized in that: the upper end of the bag spout (16) is an annular plane (18) for induction aluminum film sealing after filling.