JPS607330Y2 - Bags for product packaging - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to a bag for packaging products.

Conventionally, bags for automatically packaging paper products such as copy paper, loose-leaf paper, origami paper, etc. have been designed to have flexibility between the bag and the product in order to facilitate the insertion and packaging of these products. The body is previously formed to be slightly larger than a predetermined size.

However, in this conventional example, even after the product is packaged, the bag does not adhere tightly to the product, causing so-called bagging, and the product may move freely within the bag and be damaged.

Therefore, in order to improve the bag, it is recommended that the bag itself be made of a heat-shrinkable film, but if the bag is simply made of a heat-shrinkable film, it is difficult to insert the product. When the film is heat-shrinked after packaging, the film adheres to the product and solves the above problem, but the adhesion is too strong and the bag has to be cut to break the adhesion when the product is taken out for use. However, if the product is to be taken out in small quantities for use, it is inconvenient that the product must be stored in another bag or the like.

In view of the above, the present invention has been developed so that the bag can suitably hold the product without any sticking between it and the product, and when taking out the product, the bag does not adhere too closely to the product, making it possible to remove the product. The purpose of the present invention is to provide a bag for packaging products.

Therefore, the feature is that, in a bag body having a product storage chamber formed of a synthetic resin film, the synthetic resin film forming the product storage chamber is partially provided with a heat-shrinkable film. be.

Below, each embodiment of the present invention will be described in detail based on the drawings.
In the first embodiment shown in FIGS. 3 to 3, the bag body 1 includes a front film 1a and a back film 1 made of a synthetic resin film that does not have heat shrinkability, such as polypropylene or polyethylene.
b are superimposed, both films la and lb are melted and welded 2 along both side edges and the bottom edge of the bag body 1, and both films 1a,
A product storage chamber 3 is formed between 1b.

One end of the back film 1b is extended beyond the front film 1a and is provided with a sealing piece 4, and the sealing piece 4 is folded back and adhered to the surface of the front film 1a via an adhesive tape 5 to close the product storage chamber 3. The opening 6 can be freely sealed.

The front film 1a has side gusset parts 7, 7 and a bottom gusset part 8 that stand up from the welded both side edges and bottom edge.
is provided, thereby increasing the capacity of the product storage chamber 3,
The bag body 1 is formed into a substantially box shape.

The gusset parts 7, 7, and 8 are all divided along the longitudinal direction, and belt-shaped heat-shrinkable films 9, 9, and 10 are attached along the divided parts, and both side edges of each film are Welded to the gusset part 11. II and each side constriction part 12
．． 12 and a bottom constriction part 13 are formed.

In the bag body 1 based on this first embodiment, the product storage chamber 3 is formed in advance to be slightly larger than the size of the product to be inserted therein, and after automatically packaging the product in the product storage chamber 3, The opening 6 is sealed with the sealing piece 4, and then the bag 1 is heated to heat-shrink the side shrinkage parts 12, 12 and the bottom shrinkage part 13 as shown in the third figure.

Accordingly, the front and back films 1a, 1b suitably adhere to the product and hold the product appropriately.

When the product purchaser takes out the product from the bag 1 and uses it, he or she pulls the sealing piece 4 away from the front film 1a to open it, and freely takes out the product from the opening 6 of the product storage chamber 3. use.

At this time, the front and back films 1a and 1b do not adhere excessively to the product and allow the product to be taken out.

Therefore, in the present invention, the size of the bag 1 is made large before heating to facilitate automatic packaging of products, and after heating, the bag 1 shrinks so as to fit properly, but not excessively, to the product. However, the shrinkage rate of the product storage chamber 3 can be freely set to a predetermined value by changing the width dimensions of the heat-shrinkable film strips 9, 9, and 10.

In the illustrated embodiment, the bag body 1 is formed of two front and back films 1a and 1b, but one film is folded in half at the bottom of the bag to form front and back films la and l.
b, and it is possible to free the bag 1 by fusing and welding both films only at both side edges of the bag 1.

Further, the heat-shrinkable film can be provided on either the side gusset parts 7, 7 or the bottom gusset part 8, and only one of the side shrinkage parts 12.degree. 12 and the bottom shrinkage part 13 can be formed.

In addition, in the second embodiment shown in FIGS. 4 to 7, the front and back films la and lb of the bag body 1 are melted and welded 2 only along both side edges, and a product storage space 3 is formed between the two films 1a and 1b. is formed.

The front film 1a has the side gusset parts 7, 7 and the bottom gusset part 8 in the same manner as above, and the film is further extended from the bottom gusset part 8 to form an opening piece part 14, and the opening piece part 14 is attached to the back film. It is superposed on 1b and is fused and welded at the same time as the fused weld 2.

However, in this welding part 2, welding inhibitors 15, 15 are placed between the unsealing piece 14 and the backing film 1b, for example, on the unsealing piece 14, which allows printing ink etc. to be fused but inhibits welding.
is applied in advance, and when the welding 2 is performed, the unsealing piece 1
4 is lightly welded to the back film 1b, but the opening piece 14 can be easily peeled off from the back film 1b later.

Band-shaped heat-shrinkable films 9, 9, and 10 are welded 11.11 to both or one of the side gusset parts 7 and the bottom gusset part 8, as in the first embodiment. Both or one of the portions 12, 12 and the bottom constriction portion 13 are formed.

Further, the backing film 1b has an extending sealing piece 4 that can freely seal the opening 6, as in the first embodiment, and the sealing piece 4 is provided with an adhesive tape 5.

Even in the bag body 1 based on this second embodiment, the shrinkage rate of the product storage chamber 3 can be determined by setting the width dimension of the strip-shaped heat-shrinkable film, and the product can be stored in the same manner as in the first embodiment. After the product is easily inserted and stored by automatic packaging, the product is heat-shrinked as shown in Figure 7 to properly hold the product.

When taking out the product, in addition to opening the sealing piece 4 as in the first embodiment, the opening piece 14 is also placed on the backing film 1.
It is also possible to take out the product by peeling it off from b and opening the bottom of the bag 1.

In the third embodiment shown in FIGS. 8 and 9, the bag body 1 is constructed by fusing and welding the front and back films 1a and lb to form side gussets 7, 7 and a bottom gusset in the same manner as in the first embodiment. Part 8
The adhesive tape 5 is provided on the sealing piece 4 extending from the back film 1b. Welding the adhesive films 16 and 17 11. IIL is there.

Therefore, this film is arranged as a strip-shaped film 16 in a direction transverse to the product storage chamber 3 and a strip-shaped film 17 in a direction transverse to the storage chamber 3, but it is free to provide both or one of the two films 16 and 17. It is.

In addition, by extending both or one of the films 16.17 to the back film 1b and providing a similar heat-shrinkable part on the back film 1b, the shrinkage part 18.19 by the film 16.17 can be extended to the back film 1b. It is free to surround it in a loop shape.

Furthermore, in the fourth embodiment shown in FIGS. 10 and 11,
The bag body 1 is based on the same form as the second embodiment, and has an opening piece 14 that is lightly welded to the back film 1b via welding inhibitors 15, 15 so that it can be peeled off.
, 1b are divided in a direction transverse to the product storage chamber 3, and a belt-shaped heat-shrinkable film 20 is welded 11, 11 to the divided portion to form a shrinkage portion 21 that surrounds the product storage chamber 3.

Incidentally, the contracting portion 21 may be freely provided in the product storage chamber 3 in a substantially cross shape as in the third embodiment.

It goes without saying that the present invention is not limited to the above-mentioned embodiments. For example, in the third and fourth embodiments, the bag body 1 is simply melted and welded with a polymerized film without providing a gusset portion to the bag body 1. It is free to obtain body 1.

Furthermore, in any of the first to fourth embodiments described above, a part of the film of the bag body is divided and a belt-shaped heat-shrinkable film is welded to connect the divided parts, but the film of the bag body The desired purpose can also be achieved by overlaying and welding a belt-shaped heat-shrinkable film on top of the film without cutting it.

As a result of the above-described structure of the present invention, the synthetic resin film constituting the product storage chamber is only partially provided with a heat-shrinkable film, so that product storage can be carried out by appropriately determining the area occupied by the shrinkable film. The shrinkage rate of the chamber can be set. Therefore, when inserting and packaging a product, the size of the product storage chamber is made slightly larger to facilitate the packaging, while after packaging, the bag body properly holds the product due to heat shrinkage. The bag is held tightly and protected, and since this close contact only applies to a portion of the product and does not hold the product excessively, it holds the product appropriately, so it is necessary to cut the bag into large pieces when removing the product later. It has great practical value as it allows products to be easily taken out by simply opening only one end of the bag.

[Brief explanation of the drawing]

Fig. 1 is a plan perspective view showing the first embodiment of the present invention, Figs. 2 I and II are sectional views taken along line A-A and B-B of Fig. 1, respectively, and Figs. 3 I and II are sectional views taken along line BB of Fig. 1, respectively. Cross-sectional view showing the same effect, No. 4
The figure is a bottom perspective view showing the second embodiment, and Figures I and II are sectional views taken along lines CC and D-D in Figure 4, respectively.
Figures I and II are sectional views taken along line E-E and F-F in Figure 4, respectively.
7I and 7 are cross-sectional views showing the functions corresponding to FIGS. 5I and II, respectively. FIG. 8 is a plan perspective view showing the third embodiment, and FIGS. 8 is a cross-sectional view taken along line G-G and line H-H, FIG. 10 is a bottom perspective view showing the fourth embodiment, and FIGS. 11 I and II are I--FIG.
They are a sectional view taken along the I line and a sectional view taken along the JJ line. 1...Bag body, 1a...Front film, 1
b... Back film, 2... Welded part, 3
...Product storage room, 7.8... Gusset portion, 9.10.16,17°20... Band-shaped heat-shrinkable film, 12. 13. 18.19,21...
... Contraction part.

Claims (1)

[Claims for Utility Model Registration] 1. In a bag comprising a product storage chamber formed of a synthetic resin film, the synthetic resin film forming the product storage chamber is partially provided with a heat-shrinkable film. A product packaging bag featuring: 2. The product packaging according to claim 1 of the utility model registration claim, characterized in that the bag has a gusset portion on the side of the product storage chamber, and the gusset portion is formed of a band-shaped heat-shrinkable film. bag body. 3. The product packaging bag according to claim 1, wherein the synthetic resin film comprises a band-shaped heat-shrinkable film in the transverse or longitudinal direction of the product storage chamber. 4. The product packaging bag according to claim 3 of the utility model registration claim, characterized in that a band-shaped heat-shrinkable film surrounds a product storage chamber.