JPH0595805U - Synthetic resin film for packaging - Google Patents

Abstract

(57) [Summary] [Structure] A synthetic resin film for packaging for covering an upper opening of a container body accommodating articles, wherein two film back surfaces are partially bonded to each other with an adhesive layer interposed therebetween. It is a thing. When used for packaging, peel off the two films and use them one by one. Film products are manufactured by laminating a long film with an adhesive on the back side, bending it in the width direction and stacking it into a coil, unfolding it and cutting it to a specified length. To obtain a film product. [Effect] Since the number of times the film is peeled off is half the number of sheets used, the workability of packaging is greatly improved. .. The efficiency of cutting work in the manufacturing process is improved.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a synthetic resin film for packaging for covering an upper opening of a container body containing foods and the like.

[0002]

[Prior Art]

 For example, when selling strawberries or grapes at the store, store a suitable number of strawberries or grapes in a thin synthetic resin container body, cover the upper opening of the container body with a transparent synthetic resin film and wrap it. And sell it.

This synthetic resin film has a size according to the size of the container body, the product name of the stored item, etc., is printed on the front surface, and an adhesive layer is formed on the side edges on the back surface. After covering the upper opening of the body, the end is attached to the outside of the container body.

[0004]

[Problems to be solved by the device]

 However, conventional synthetic resin films for packaging are supplied in a state where an adhesive layer is formed on the back side of each film and a number of films are stacked, so when used during packaging, the number of sheets used It took time and effort to peel the films one by one from the laminated film, resulting in poor packaging workability. In addition, when applying the method of flattening a coiled long film wound in the film manufacturing process and cutting it to a fixed length at a time, an adhesive layer is formed on the back surface Since the diameter cannot be adjusted and the number of winding layers is increased, the print misalignment between the outer layer and the inner layer becomes large.Therefore, it is not possible to increase the number of winding layers and there are restrictions on increasing the cutting efficiency. there were.

The problems to be solved in the present invention are to reduce the trouble of peeling off the film during use and to further improve the efficiency in cutting from a long film to a standard film.

[0006]

[Means for Solving the Problems]

 The present invention is a synthetic resin film for packaging for covering an upper opening of a container body accommodating an article, characterized in that the back surfaces of two films are partially adhered to each other via an adhesive layer. And

[0007]

[Action]

 With the synthetic resin film for packaging of the present invention, two films can be used by peeling the film once. In the film manufacturing process, a double-width long film is continuously bent in the width direction and partially bonded with an adhesive, and then the winding diameter is adjusted according to the number of winding layers. It is possible to apply a method in which the material is wound up, flattened and cut to a fixed length.

[0008]

【Example】

 FIG. 1 is a perspective view showing a synthetic resin film for packaging according to an embodiment of the present invention, and FIG. 2 is a perspective view showing an example of a usage state of the synthetic resin film for packaging.

The synthetic resin film 1 for packaging shown in FIG. 1 is formed by laminating two films 1 a and 1 b with an adhesive layer 2 interposed therebetween. Each of the films 1a and 1b is a polypropylene film having a thickness of about 30 μm, and the adhesive layer 2 is a resin-based adhesive adhered by a method described later. In the figure, the thicknesses of the films 1a and 1b and the adhesive layer 2 are shown in an enlarged manner for easy understanding.

The synthetic resin film for packaging 1 is used by peeling off two films and covering the upper opening of the container body 3 containing foods and the like as shown in FIG.

3 to 5 are schematic views showing a part of the manufacturing process of the synthetic resin film for packaging according to the present invention, FIG. 3 is a diagram showing an adhesive attaching step, and FIG. 4 is an adhesive attaching step. FIG. 5 is a diagram showing a width direction bending step following FIG. 5, and FIG. 5 is a diagram showing a winding step following the bending step.

In FIG. 3, the molten adhesive from the melting tank 5 is transferred from the nozzle 5a to the transfer belt on the back surface of the film 4a which is conveyed in the direction of the arrow with the front side on which the display of the name of the stored article is printed. It is transcribed intermittently via 6. The film 4b after the transfer of the adhesive is conveyed to the folding device 7 shown in FIG.

The folding device 7 includes guide rolls 8, 9, 10, 11, 12, 13 and a guide plate 14, and the film 4 b conveyed in the direction of the arrow is bent in the width direction at the lower end of the guide plate 14. Then, the guide rolls 11 are overlapped with each other. The folded film 4c is conveyed to the winding device 15 shown in FIG.

The winding device 15 is a conventionally known device capable of adjusting the outer diameter of the winding frame 16, and is adjusted by the adjusting screw 18 of the winding frame support rod 17 radially attached to both ends of the rotary shaft 19. The apparatus is capable of moving the winding frame 16 in the radial direction and adjusting the winding diameter of the outer layer to be constant. Using the winding device 15, the folded film 4c is wound in multiple layers. The outer diameter of the winding frame 16 is reduced in accordance with the increase in the number of winding layers to keep the winding diameter of the outer layer constant. At this time, the inner layer is slightly loosened between the winding frames 16.

Since the peripheral length of the outer layer is constant at each time of winding, when one portion of the coil after winding is cut and unfolded, as shown in FIG. A large number of rums 4d are stacked. Since the length of the film 4d is several times as long as that of the film 1 of the final product, the length of the film 4d should be adjusted to match the length of the film 1 of the final product and the folded portion should be cut off. Cut 4d. As a result, a product is obtained in which the two films 1a and 1b shown in FIG. 1 are adhered to each other on their back surfaces with an adhesive.

[0016]

[Effect of the device]

 The synthetic resin film for packaging of the present invention has the following effects.

In the case of the conventional film, the film has to be peeled off the same number of times as the number of used sheets, but since the film of the present invention requires half the number of used sheets, the workability of packaging is greatly improved.

The efficiency of the cutting operation in the film manufacturing process is improved.

[Brief description of drawings]

FIG. 1 is a perspective view showing a synthetic resin film for packaging according to an embodiment of the present invention.

FIG. 2 is a perspective view showing an example of a usage state of a synthetic resin film for packaging.

FIG. 3 is a schematic view showing a step of applying an adhesive in the manufacturing process of the synthetic resin film for packaging according to the present invention.

FIG. 4 is a schematic view showing a bending process in the width direction following the process of FIG.

FIG. 5 is a schematic view showing a winding step following the step of FIG.

FIG. 6 is a diagram showing a state in which the film after winding is cut and developed.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Synthetic resin film for packaging 1a, 1b film 2 Adhesive layer 3 Container body 4a, 4b, 4c, 4d Film 5 Melting tank 5a Nozzle 6 Transfer belt 7 Folding device 8, 9, 10, 11, 12, 13 Guide roll 14 Guide plate 15 Winding device 16 Winding frame 17 Support rod 18 Adjustment screw 19 Rotating shaft

Claims (1)

[Scope of utility model registration request] 1. A synthetic resin film for packaging for covering an upper opening of a container body accommodating an article, wherein the back surfaces of two films are partially adhered via an adhesive layer. Synthetic resin film for packaging.