JPH0137267B2 - - Google Patents

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention relates to packaging materials, and more specifically, to packaging materials that are impermeable when packaged, but can be made breathable if necessary. The present invention also relates to a packaging material whose air permeability can be freely adjusted.

(Prior art) For example, solid insect repellents for clothing such as naphthalene (hereinafter simply referred to as insect repellents) are sold in small quantity packages, but until they are used, the insect repellent components are prevented from escaping. Therefore, the packaging material is only considered to be impermeable.

(Problem to be Solved by the Invention) When using an item packaged in this manner, the user cuts off a corner of the packaged bag and volatilizes the insect repellent component from this hole. This cutting work is fine if it is a small amount, but it becomes troublesome if a large amount is used. Also, if the insect repellent is packaged in extremely small amounts, you can cut off the corner and let the air escape through the hole, but if a large amount is packaged in one package, the insect repellent wrapped in You can't make too big a hole because you don't want water to leak out of the cut hole.
The holes created by cutting out the four corners may not be sufficient for the release of insect repellent ingredients.

Also, if the packaged contents are fixed, the corners may be cut off, but if the contents are powder, ventilation cannot be provided by cutting the corners. In this case, the powder had to be wrapped in a breathable material and then wrapped in an impermeable material.

These things are common when packaging not only insect repellents but also desiccants and various other items.

(Means for Solving the Problems) In view of the above, the inventors of the present invention have discovered that although packaging is impermeable, it is possible to easily provide ventilation as needed, and that the ventilation As a result of intensive research and various experiments in order to provide a packaging material that can freely adjust the degree of
In a laminated sheet in which a breathable base material such as non-woven fabric, cloth, etc. and a synthetic resin coating are laminated, a tape made of synthetic resin or paper is inserted at intervals between the breathable base material and the synthetic resin coating. At the same time, the packaging material is made impermeable by crimping and integrating the breathable base material and the synthetic resin coating. When the packaging material is peeled off from above, the air permeable base material of the peeled part of the packaging material is exposed and has air permeability, and the air permeability can be further adjusted by the area of the tape that is peeled off. By using this material, the purpose can be well achieved and the present invention has been achieved.

(Example) An example of the implementation of the present invention will be described below with reference to the accompanying drawings. Reference numeral 1 denotes a breathable base material made of, for example, nonwoven fabric. Reference numeral 2 denotes a synthetic resin coating laminated on the air-permeable base material 1, and is made of, for example, a polyethylene film. Reference numeral 3 denotes a tape, in which one or more tapes are inserted at intervals between the breathable base material 1 and the synthetic resin coating 2 in the longitudinal direction. The packaging material configured in this way must be cut into an appropriate shape before it can be made into a bag.
A bag is made with a breathable material inside, and the desired item is placed inside the bag and then sealed. In the case of a bag sealed in this way, the outer periphery of the bag is covered with a synthetic resin film, so the inside of the bag has no air permeability, so the items stored inside the bag are free from volatile components. Even if it does contain it, it will not leak out of the bag. However, for example, when the item inside the bag is an insect repellent, the ingredients of the insect repellent must be released outside the bag when used.
At this time, by picking up the tape 3 by hand and pulling it, the tape 3 is peeled off from the air permeable base material 1 together with the synthetic resin coating 2 on the tape, and the air permeability of the part where the tape 3 is applied is removed. Since the base material 1 is exposed to form the breathable part 4, the insect repellent component is released from the breathable part 4 to the outside and functions as an insect repellent. In this case, the adjustment of air permeability, that is, whether the degree of air permeability should be made good or bad, and how much should be maintained, depends on the density of the air permeable base material and the area of the tape to be peeled off (width of one tape, width of the tape, It is determined approximately by the distance from the tape, the number of tapes to be peeled per unit area, etc.

The breathable base material used in the present invention may be anything that has breathability, such as non-woven fabric, Japanese paper, Western paper, cloth, etc. Even if it is a synthetic resin film, sheet, etc., the film may be formed by some means. ,
Any sheet that provides breathability may be used.

In the present invention, the tapes used include flat yarns, tape yarns, and tape yarns made of polypropylene, polyethylene, and other plastics.
Examples include things called ribbon yarns, tapes made of paper or other appropriate materials, but in addition, strings, threads, etc. made of various materials can be used if breathability is low. No problem.

In the present invention, the synthetic resin film refers to a laminate layer, film, sheet, etc. made of synthetic resin. Among these, in the case of films, sheets, etc., the tape between the film and the breathable base material is used. It is desirable that when the film or sheet is picked and pulled by hand, the part of the film or sheet will break and peel off along with the tape. It is preferable that the film be uniaxially stretched.

In the present invention, the tape and the synthetic resin coating are laminated on the breathable base material, for example, by overlapping the flat yarn, which is also sent out, on the nonwoven fabric as the breathable base material, which is sent out, and the overlapping part is The most economical method is to extrude the polyethylene resin from a melt die, press it with a press roll and a cooling roll, and laminate it. Overlapping,
It is also possible to superimpose a plastic film sent out on top of this and heat-sheet them one after another, or to bond them together with an adhesive or a pressure-sensitive adhesive. In any case, it is desirable that the synthetic resin coating and the breathable base material are well integrated and not easily peeled off, but it is desirable that the tape and the breathable base material be free of adhesion or fusion, and Even if it is fused or bonded, it is desirable that it be to the extent that it can be easily peeled off from the breathable substrate during use.

The packaging material according to the present invention is suitable as a packaging material for things such as bags, and the bag preferably stores an insect repellent such as naphthalene. The insect repellent components contained in the bag will not leak outside from the time the bag is applied until the tape is peeled off to provide ventilation. It is also suitable for storing desiccant agents, oxygen absorbers, etc. in the bag, and in such cases, the bag is made breathable by peeling off the tape, allowing moisture to be absorbed around the bag. It absorbs oxygen, and in these cases, it goes without saying that materials with good gas barrier properties should be selected for the synthetic resin coating, tape, etc., especially when an oxygen absorber is to be stored.

(Effects of the Invention) Since the present invention is configured as described in detail above, when a package such as a bag is made, the entire package is impermeable, so that the inside of the package is impermeable. Even if the product contains volatile components, the volatile components will not leak out of the package, ensuring complete protection of the contents, and even if the product does not contain volatile components, it will be moisture-proof. Because it is enough
It is also suitable as a package for items that require moisture resistance, and if the package contains something like an insect repellent and you want to use the insect repellent, you can pick up the tape on the package by hand and pull it. If the tape and the synthetic resin coating thereon are easily torn and peeled off from the air-permeable base material, the air-permeable base material is exposed to form the air-permeable part. If placed in a desired location, it can very easily function as an insect repellent. In addition, the degree of breathability of the package can be adjusted by appropriately selecting the density of the breathable base material and the width, number, and spacing of the tapes, which is a simple and unprecedented feature that has never been seen before. This is an excellent invention that can provide a packaging material that is both functional and functional.

[Brief explanation of drawings]

The attached drawings show an example of the implementation of the present invention, and Fig. 1 is a perspective view showing a part of the packaging material, and Fig. 2 shows the same as shown in Fig. 1, with part of the tape and synthetic resin coating removed. FIG. 1: Breathable base material, 2: Synthetic resin coating, 3: Tape, 4: Breathable part.

Claims (1)

[Claims] 1. In a laminated sheet in which a breathable base material such as paper, nonwoven fabric, cloth, etc. and a synthetic resin coating are laminated, a tape made of synthetic resin, paper, etc. is placed at an interval between the breathable base material and the synthetic resin coating. The packaging material is made impermeable by sandwiching the tape and integrating the breathable base material and the synthetic resin coating, but the sandwiched tape and the synthetic resin coating on the tape are both By peeling off the air-permeable base material, the air-permeable base material in the peeled part of the packaging material is exposed and has air permeability, and the air permeability can be further adjusted by the area of the tape to be peeled off. A packaging material characterized by: