JPS6152042B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Technical Field) The present invention relates to an individual package for sanitary products, such as sanitary napkins or disposable diapers, and a method for packaging the same.

(Prior Art) Generally, sanitary napkins and the like that have been commercially available in recent years are appropriately folded and individually packaged using packaging materials. When using a napkin, the wrapping material is torn, the napkin is taken out, and the wrapping material is thrown away. That is, the packaging material has the function of simply wrapping the napkin before use for reasons of hygiene and appearance, and cannot be reused after the napkin is taken out.

On the other hand, disposable diapers that have been on the market in recent years are not individually packaged using packaging materials, so after use, the diapers are wrapped in relatively large paper, plastic sheets, or bags made of these materials and then thrown away. Especially when traveling, it is troublesome to have to carry the above-mentioned paper for disposal in addition to diapers.

(Objective of the Invention) In view of the above-mentioned inconvenience, the first object of the present invention is to provide an individual package for sanitary products that has the functions of both individual packaging and a bag for disposal after use. It is in.

The second to fourth objects of the present invention are to provide a method for continuously forming individual sanitary product packages using simple means.

(Structure of the Invention) The first to fourth aspects of the present invention have the following points in order to achieve each of the above objects.

The first aspect of the present invention is an individual packaging body for sanitary products, in which a packaging film is arranged in the central part of a required large surface area, a first side part on one side thereof, and a second side part on the other side. and a pocket portion formed by bending the second side portion and bonding both ends of the second side portion and the center portion by welding to store sanitary products, and bending the first side portion. A lid portion is formed, and the inner surface of the lid portion is removably adhered to the upper surface of the pocket portion using an adhesive. Furthermore, both ends of the inner surface of the lid part and the upper surface of the pocket part are adhered by welding, and the adhesive strength of the welding is stronger than the welding of the center part and the second side part forming the pocket part. The adhesive force is strengthened by

In a preferred embodiment of the first aspect of the present invention, the packaging film is made of polyolefin resin, and the inner surface of the lid portion is subjected to corona discharge treatment to reduce the thermal weldability of that portion, and , Printing ink or resin is applied thinly or intermittently to the inner surface of the lid portion to reduce the thermal weldability of that portion.

The second aspect of the present invention is a method for individually packaging the above-mentioned sanitary products, which involves continuously transporting each sanitary product along the transport path at regular intervals, while
A polyolefin resin packaging film having a required width and having been subjected to a corona discharge treatment to reduce thermal weldability on the inner surface of the first side portion, which is to be used as a lid, is continuously supplied to the transfer path. Further, while continuously placing the sanitary products at the inner surface of the center portion of the packaging film at the lower side of the pocket portion, the sanitary product is continuously placed on the inner surface of the center portion of the packaging film, which is opposite to the first side portion that is to be used as the lid portion. The second side portion, which is located above the pocket portion, is bent and overlapped with the upper surface of one side of the sanitary product, and the first side portion, which is to be the lid portion, is bent and the second side portion is placed above the pocket portion. The sanitary product is continuously coated on the upper surface of the second side portion, which is to be the upper side. Furthermore, the lower surface of the first side, which is to be the lid, is continuously adhered to the upper surface of the second side, which is to be the upper side of the pocket, using an adhesive to form a continuous package. By sequentially heat welding and cutting the thus formed continuous package in the width direction between the respective sanitary products, the pocket portion formed by the center portion and the second side portion and the lid portion formed by the first side portion are formed. forming each individual package having a

A third aspect of the present invention is another method for individually packaging the sanitary products, which reduces heat weldability to the inner surface of the first side portion, which is to be the lid portion, in the second aspect of the present invention. Instead of the corona discharge treatment to reduce the temperature, the inner surface of the first side portion is subjected to a printing ink adhesion treatment to reduce thermal weldability, and the other features are the same as in the second aspect of the present invention.

A fourth aspect of the present invention is yet another method for individually packaging the sanitary products, which is characterized in that, in the second aspect of the present invention, the first aspect of the present invention is
Instead of subjecting the inner surface of the side portion to a corona discharge treatment to reduce heat weldability, the inner surface of the first side portion is subjected to a resin adhesion treatment to reduce heat weldability, and the rest is the second invention. It is the same as

In the second to fourth preferred embodiments of the present invention, the first winding member and the second winding member each have an L-shaped cross section, and the first winding member and the second winding member has an upper wall portion bent at a substantially right angle to the side wall portion thereof, and the upper wall portion of the second winding member is provided with an appropriate gap above the upper wall portion of the first winding member, and facing each other so as to overlap with an appropriate gap between the side end of the upper wall of the first winding member closest to the inner surface of the side wall of the second winding member and the inner surface of the upper wall of the second winding member. Use the packaging equipment in place. Then, with the center portion of the packaging film positioned on a transfer bed that moves inside the packaging device, the second side portion of the packaging film is bent by the inner surface of the first winding member, and the Each of the sanitary products is covered by bending the first side part through the respective gaps by the inner surface of the second winding member.

(Example) The first to fourth aspects of the present invention will be summarized for convenience based on the illustrated embodiments, and will first describe a method for forming individual packaging bodies for sanitary products, and then describe the individual packaging bodies obtained by the method. The package will be explained as follows.

FIG. 1 shows a schematic diagram of an apparatus for carrying out the method of the invention. Each sanitary product 1 is manufactured through its manufacturing process (not shown), folded into an appropriately small form such as trifold, and placed at regular intervals before and after the device shown in FIG. 1, that is, the individual packaging process. It is designed to be transported continuously. Each sanitary product 1 thus transferred is placed in a roll group 2,
It is taken up by belts 4 and 5 rotating by 3 and transferred to a packaging device 6. On the other hand, a polyethylene film 8 having a required width for wrapping each sanitary product 1 is wound around the winding 7, and the film 8 is rotated by a belt 10 by a group of rolls 9, and a wrapping device 6 by an intermediary roll 11. unwind continuously.

Required surface area W on the inner surface of the first side 8a of the film 8 that will become the lid of the individual package described later (see FIG. 4)
has undergone preliminary treatment to reduce heat sealability. Corona discharge treatment is preferred as this treatment, and in this treatment, ozone and nitrogen oxide that have generated corona react with the treated area to generate carbonyl groups and make it hydrophilic. It is known that thermal weldability deteriorates in this case. In this embodiment of the method of the present invention, in order to take advantage of this characteristic, the surface area W is subjected to excessive corona discharge treatment to reduce thermal weldability. This treatment is suitable when the film 8 is made of polyolefin resin, but if a material unsuitable for corona discharge treatment is used instead of the film 8, for example, printing ink or resin may be applied to the surface area W very thinly or It may be applied intermittently to reduce heat weldability. Of course, the coating treatment may be performed instead of the corona discharge treatment even when the film 8 is made of polyolefin resin.

During the process of unwinding the film 8 to the packaging device 6, the film 8 that has been pretreated in this manner is coated with pressure sensitivity in the longitudinal direction of the area W on the inner surface of the first side portion 8a by the coating device 12 as shown in FIG. The adhesive 13 is applied continuously in a linear manner. However, the adhesive 13 should be applied to the second side 8 instead of the inner surface of the first side 8a.
c It may be the upper surface. Further, the adhesive 13 may be applied after the film 8 has passed through the packaging device 6. As such a coating method, the first method is
In addition to spraying the adhesive as shown in the figure, a method of applying the adhesive via a roll immersed in an adhesive tank is preferably used.

The packaging device 6 is attached to the upper part of the support frame 14 as shown in FIGS. 2 and 3, and has a cross section L.
The first winding member 15 and the second winding member 16 are shaped like
It is made up of. The members 15 and 16 are the side wall portion 1
The upper wall portion 15 includes approximately triangular upper wall portions 15b and 16b bent at approximately right angles to the upper wall portions 5a and 16a.
A part of the upper wall portion 16b overlaps with a gap 17 at the upper part of b, and the side wall 15c of the upper wall portion 15b closest to the inner surface of the side wall portion 16a and the inner surface of the upper wall portion 16b overlap with a gap 18. The films 8 and 8 are arranged facing each other, and the gaps 17 and 18 are made slightly wider than the thickness of the film 8. Further, the space formed by the inner surfaces of the upper wall portions 15b and 16b and the upper surface of the belt 10 located inside the device 6 is made large enough to allow the sanitary product 1 to pass together with the film 8 without difficulty. The film 8 is shown in FIG. 3 with its central portion 8b positioned on the belt 10, and the sanitary products 1 placed on the inner surface of the central portion 8b with the above-mentioned intervals maintained, and moved by the belt 10. Like film 8
The second side portion 8c of the film 8 is bent by the inner surface of the first winding member 15 and overlapped with the upper surface of one side of the sanitary product 1, and the first side portion 8a of the film 8 is folded into the gap 17, 18.
The film 8 is bent by the inner surface of the second winding member 16 and overlapped with the upper surface of the second side 8c of the film 8 to continuously cover each sanitary product 1. The films 8 thus coated at regular intervals are placed in the roll group 1.
The film 8 is transported by belts 20 and 21 rotating by belts 8 and 19, and the first side 8a of the film 8 is transferred onto the upper surface of the second side 8c of the film 8 by the pinching force of the belts 20 and 21.
are continuously adhered via an adhesive 13 to form a continuous package 22.

The thus formed continuous packaging body 22 is thermally welded and cut in a sequential direction by the thermal welding and cutting device 23 to cut the films 8 between each sanitary product 1 in the 29 directions to form individual packaging bodies 24. An appropriate number of individual packages 24 are collected in parallel by rotating belts 27 and 28 and transported to a process (not shown) for packaging them in an exterior material.

The individual package 24 completely wrapped in this way is attached to the central portion 8b of the film 8 as shown in FIG.
Both end portions 8d of the film 8 and the second side portion 8c are thermally welded to form a pocket portion 24a for storing the sanitary product 1, and the first side portion 8a of the film 8 is bonded to the upper surface of the second side portion 8c with the adhesive 13. At the same time, both ends 8e are thermally welded to form a lid portion 24b for the pocket portion 24a.

(Effects of the Invention) In the first aspect of the present invention, when using the sanitary product 1, the end 24c of the lid 24b is held and pulled to release it and take it out from the pocket 24a. Both ends 8d of the second side portion 8c
than the adhesive strength of both ends 8e of the first side 8a of the film 8 in the thermal weldability reducing treatment to
Since the adhesive strength due to heat welding between the central portion 8b and the second side portions 8c of the film 8 and both ends 8d is strong, when the lid portion 24b is peeled off, the pocket portion 24
There is no possibility that both ends of the film 8, that is, the ends 8d of the central part 8b and the second side part 8c of the film 8 will peel off and impair the function of the pocket part 24a. Therefore, the sanitary product 1 with menstrual blood adhered to it after use is stored in the pocket part 24a again in its original state, and the lid part 24 is returned to its original state.
b can be re-attached to the upper surface of the pocket part 24a with the adhesive 13 and then thrown away, which is extremely convenient and sanitary.

In the second to fourth inventions,
Adhesive force between the first side portion 8a and the second side portion 8c;
As a method of creating a difference in strength between the adhesive force between the central portion 8b and the second side portion 8c, the first side portion 8
In the first aspect of the present invention, an oriolefin resin film is used as the film 8, and a corona discharge treatment is applied to the corresponding part of the film. Furthermore, in the third aspect of the present invention, printing ink adhesion treatment is applied to the relevant portion of the film 8, and in the fourth aspect of the invention, resin adhesion treatment is applied to the relevant portion of the film 8. Both treatments are extremely simple, and furthermore, the heat weldability between the first side portion 8a and the second side portion 8c is lower than the heat weldability between the center portion 8b and the second side portion 8c. Therefore, the individual packaging method is extremely simple, which is advantageous for mass-producing the individual packaging bodies 22 at low cost.

Furthermore, as a means for implementing the individual method for sanitary products, the first winding part 15 and the second winding member 1
6, etc., in the sanitary product transfer path, the structure of the means is simple.

[Brief explanation of the drawing]

Fig. 1 is a schematic diagram of an apparatus for carrying out the method of the present invention, Fig. 2 is a perspective view of the packaging apparatus, Fig. 3 is a sectional view of the packaging apparatus in a state in which sanitary products are covered with a film, and Fig. 4 is a partial perspective view of a film, FIG. 5 is a perspective view showing the cutting and welding positions of a continuous package, and FIG. 6 is a partially cutaway perspective view of an individual package packaged by the method of the present invention. 1... Sanitary goods, 6... Packaging equipment, 8... Film,
8a...first side part, 8b...center part, 8c...second side part, 12...coating device, 13...adhesive, 15...first
Winding member, 16...Second winding member, 15a, 1
6a...Side wall part, 15b, 16b...Top wall part, 17,
18...Gap, 22...Continuous package, 23...Welding and cutting device, 24...Individual package.

Claims (1)

[Claims] 1. Consisting of a packaging film each having a central portion of a required large area, a first side portion on one side thereof, and a second side portion on the other side, the second side portion being bent. A sanitary product is stored in a pocket formed by gluing both ends of this and the central part, and the first side is bent to form a lid, and the inner surface of the pocket is glued with adhesive. In the individual package for sanitary products that is removably glued to the top surface, both ends of the inner surface of the lid part and the top surface of the pocket part are bonded by heat welding, and the adhesive force is stronger than that of the welding. An individual packaging body for sanitary products, characterized in that the center part forming the pocket part and the second side part have a strong adhesive force by welding. 2. An individual package for sanitary products according to claim 1, wherein the packaging film is made of a polyolefin resin, and the inner surface of the lid part is subjected to corona discharge treatment to reduce the heat weldability of that part. . 3. An individual package for sanitary products according to claim 1, wherein printing ink is applied thinly or intermittently to the inner surface of the lid to reduce the thermal weldability of that portion. 4. An individual package for sanitary products according to claim 1, wherein a resin is applied thinly or intermittently to the inner surface of the lid part to reduce heat weldability of that part. 5 While each sanitary product is continuously transferred along the transfer path at regular intervals, the first
A packaging film made of polyolefin resin having a required width and having undergone corona discharge treatment to reduce thermal weldability on the inner surface of the side part is continuously supplied to the transfer path, and the lower side of the pocket part of the packaging film is While the sanitary products are continuously placed on the inner surface of the central part, which should be placed at the same distance, the sanitary products should be placed on the opposite side of the first side part, which should be the lid part, and above the pocket part. The second side portion is bent and stacked on the upper surface of one side of the sanitary product, and the first side portion, which is to be the lid portion, is bent and stacked on the second upper surface, which is to be the upper side of the pocket portion. to continuously cover the sanitary product, and continuously adhere the lower surface of the first side portion, which is to be the lid portion, to the upper side of the pocket portion using an adhesive to form a continuous package, and By sequentially heat welding and cutting the package in the width direction between the sanitary products, each individual product having the pocket part formed by the center part and the second side part and the lid part formed by the first side part is formed. A method for individually packaging sanitary products, the method comprising forming a package. 6 While each sanitary product is continuously transferred along the transfer path at regular intervals, the first
A packaging film having a required width, which has been subjected to a printing ink adhesion treatment to reduce thermal weldability on the inner surface of the side part, is continuously supplied to the transfer path, and the packaging film should be placed under the pocket part of the packaging film. A second side, which is located on the opposite side of the first side, which is to serve as the lid part, and which is to be above the pocket part, while continuously placing the sanitary products on the inner surface of the central part while maintaining the interval. The sanitary product is folded and placed on the upper surface of one side of the sanitary product, and the first side portion, which is to be the lid portion, is bent and overlapped with the upper surface of the second side portion, which is to be the upper side of the pocket portion. The sanitary product is continuously covered, and the lower surface of the first side, which is to be the lid, is continuously adhered to the upper surface of the second side, which is to be the upper side of the pocket, with an adhesive. By forming a continuous package and sequentially heat welding and cutting the continuous package in the width direction between the sanitary products, the pocket part and the first side part are formed by the center part and the second side part. 1. A method for individually packaging sanitary products, comprising forming individual packages each having the lid part according to the method. 7 While each sanitary product is continuously transferred along the transfer path at regular intervals, the first
A packaging film having a required width and having a resin adhesion treatment applied to the inner surface of the side portions to reduce thermal weldability is continuously supplied to the transfer path, and the center of the packaging film is placed on the lower side of the pocket portion of the packaging film. A second side portion located opposite to the first side portion that serves as the lid portion and above the pocket portion while continuously placing the sanitary products on the inner surface of the pocket portion while maintaining the spacing therebetween. The sanitary product is folded and stacked on the top surface of one side of the sanitary product, and the first side portion, which is to be the lid portion, is bent and stacked on the top surface of the second side portion, which is to be the top side of the pocket portion. The sanitary product is continuously covered, and the lower surface of the first side, which is to be the lid, is continuously adhered to the upper surface of the second side, which is to be the upper side of the pocket, with an adhesive. By forming a package and sequentially heat welding and cutting the continuous package in the width direction between the sanitary products, the pocket portion formed by the central portion and the second side portion and the pocket portion formed by the first side portion are formed. 1. A method for individually packaging sanitary products, comprising forming individual packages each having a lid part. 8 Consisting of a first winding member and a second winding member each having an L-shaped cross section, the first winding member and the second winding member each have an upper wall that is bent approximately at right angles to their side walls. the upper wall of the second winding member is located above the upper wall of the first winding member with an appropriate gap, and the upper wall of the second winding member is closest to the inner surface of the side wall of the second winding member; Using a wrapping device that is arranged to face the side end of the upper wall of the first wrapping member and the inner surface of the upper wall of the second wrapping member so as to overlap with each other at an appropriate interval, the center portion of the packaging film is wrapped in the wrapping device. The second side of the packaging film was bent by the inner surface of the first winding member while it was placed on a transfer belt moving inside the device, and the first side was passed through each gap. 8. The method for individually packaging sanitary products according to claim 5, 6, or 7, wherein each of the sanitary products is covered by bending the wrapper by the inner surface of the second winding member.