JPH06142343A - Balloon - Google Patents

Abstract

PURPOSE:To give biodegradability, rain-resistance and water-solubility to a balloon, and eliminate the environmental contamination by a method where the outside of a balloon is formed of an airtight, water-proof and biodegradable resin layer, and the inside is formed of an airtight and water-soluble, or water- dispersable resin layer. CONSTITUTION:This balloon 1 is constituted of two layers, an external layer 5 made of an airtight, waterproof and biodegradable resin layer, and an internal layer 4 made of an airtight, and water-soluble or water-dispersable resin layer. As the resin to constitute the external layer 5, an aliphatic polyester is preferable, and as the resin to constitute the internal layer 4, polyvinyl alcohol is preferable. Also, at the end of the balloon 1, a gas injection port 2 for gaseous helium, etc., is provided. As a method to made the balloon 1 of a resin film with the previously mentioned two layers, after heat-sealing the resin film by a ring-shaped brass die which adjusted to a specified temperature, the resin film is punched with a cutter with the same shape, and the balloon 1 can be easily made. This balloon can be used for events, advertisements and propagation.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a balloon which has properties of microbial degradability, rain resistance (water resistance) and water solubility and does not pollute the environment.

[0002]

2. Description of the Related Art The mainstream of launch balloons used in events and the like are those made of natural rubber, but in recent years it has been difficult to launch a large number of balloons at events or the like due to environmental pollution. It's coming. Most of the balloons that are launched fall into the sea, but the natural rubber that is the material of them floats in the sea without decomposing and dissolving in seawater, and marine animals such as sea turtles and seabirds eat it and die of it. Sex has been pointed out. However, launching balloons is very effective in raising the atmosphere of the event,
At present, there is a demand for a suitable material that can replace natural rubber. Recently, balloons containing water-soluble polyvinyl alcohol as a main component have been marketed in consideration of the environment, but balloons made from polyvinyl alcohol have no rain resistance,
It cannot be launched even when it rains lightly. Generally, from the day before the event, preparation work is performed to inject helium gas into the balloon, but depending on the weather of the day, it may not be launched and all may be wasted. In addition, in the current situation where the melted pasty polyvinyl alcohol adheres to the ground due to the partial dissolution of the rain immediately after launch and the balloon pierces and falls, causing secondary environmental pollution. is there.

[0003]

SUMMARY OF THE INVENTION In view of the above-mentioned drawbacks of the prior art, the present invention provides a resin layer as an outer layer which is not affected by rain at launch and has water resistance even when dropped into seawater. , Which is decomposed by microorganisms in seawater and disappears within a few weeks, and has an airtight inner layer, and a water-soluble or water-dispersible resin layer dissolves and disappears in seawater within a few minutes, which is extremely useful. The object is to provide a balloon characterized by various properties. The present inventor has studied the structure of such a balloon, and as a result, by using an aliphatic polyester layer as an outer resin layer and polyvinyl alcohol as an inner resin layer to form a balloon with a two-layer film, the above-mentioned problems can be solved. The inventors have found that all the points are resolved and have reached the present invention.

[0004]

The features of the present invention are as follows, as shown in FIGS. 1 to 3, in place of natural rubber which has not been biodegradable and does not dissolve in seawater.
It comprises a resin layer (2) having biodegradability and rain resistance, and a resin layer (3) having water solubility or water dispersibility and excellent gas barrier properties, and the inside is biodegradability and rain resistance. A balloon (1) made of a two-layer film comprising a resin layer having a property and a resin layer having a water-soluble property or a water-dispersible property and a gas barrier property on the outside. Aliphatic polyester is preferable as the resin having microbial degradability and water resistance in the present invention, and polyvinyl alcohol is preferable as the resin showing water solubility or water dispersibility and gas barrier property.

Examples of the aliphatic polyester used in the present invention include polyhydroxyacetic acid, polylactide,
Polyprobiolactone, poly 3-hydroxybutyrate,
Examples thereof include poly ε-caprolactone, polybivalolactone, polyethylene adipate, polyethylene azelate, polyethylene suberate, poly (3 hydroxybutyrate-co-3 hydroxyvalerate), and polyethylene sebacate. Examples of natural resins include cellulose derivatives such as shellac, dammar, chitansan gum, chitosan, collagen and ethyl cellulose. The thickness range is 1 to 100 microns, preferably 5 to 50 microns. If it is less than 1 micron, pinholes are generated and water resistance is insufficient. 100
If it exceeds micron, the weight of the film increases and it is not practical and economically disadvantageous as a balloon application.

The polyvinyl alcohol used in the present invention is a partially saponified product of polyvinyl acetate, or
Examples thereof include polyvinyl alcohol modified with maleic acid, itaconic acid and the like. The saponification degree is preferably 70 to 98 mol%, and the polymerization degree is preferably 500 to 3000. In the present invention, the reason for using polyvinyl alcohol having a saponification degree and a polymerization degree as described above is that when the saponification degree is 70 mol% or less or 98 mol% or more, the water solubility is poor, and when the polymerization degree is 500 or less, the film strength is If it exceeds 3000, it will take too long to dissolve in water. The thickness range may be 10 to 100 microns. If it is less than 10 μm, not only sufficient heat seal strength is not obtained, but also the gas barrier property is insufficient.
It will fall in a few hours. If it exceeds 100 microns, the weight becomes excessive and a considerable amount of buoyancy must be generated, which is economically disadvantageous and impractical, but is not particularly limited to this range.

As a method for constructing a two-layer film, an outer resin layer, for example, an aliphatic polyester is formed into a film by an inflation method or a casting method in advance, and this film and an inner resin layer, for example, polyvinyl alcohol are cast. It is possible to apply a method of forming a film by a method or the like and laminating both films with an adhesive, or a method of coating the surface of the polyvinyl alcohol film with a solution in which an aliphatic polyester and a natural resin are dissolved in an organic solvent.

If necessary, other resins, colorants, plasticizers, slip agents, surfactants and the like can be added to the aliphatic polyester and polyvinyl alcohol. It is also possible to print letters and pictures on the surface of this two-layer film to enhance the demonstration effect. The present invention will be further described with reference to the drawings. FIG. 1 is a perspective view in which a part of a balloon of the present invention before being inflated is canned. The balloon (1) is an airtight, outer layer (5) made of a water-resistant and biodegradable resin layer, and an inner layer (4) made of an airtight, water-soluble or water-dispersible resin layer. It consists of two layers. A gas inlet (2) for helium gas or the like is provided at the end. FIG. 2 is a plan view of the balloon (1), and (3) is a heat seal part. FIG. 3 shows A of FIG.
It is sectional drawing in the -A 'line. The balloon of the present invention is configured as shown in the figure.

As a method of forming a balloon from the above-mentioned two-layer film, a balloon is easily formed by heat-sealing with a ring-shaped brass mold whose temperature is adjusted to a constant temperature and then punching with a cutter of the same mold. The balloon of the present invention can be used for events, small balloons for announcements and advertisements, and balloons for toys.

Next, the present invention will be specifically described with reference to examples.

[Example 1] A 10% toluene solution of poly ε-caprolactone (UCC TONE) was coated on one side of a polyvinyl alcohol film having a thickness of 25 μm (Solvlon KA-25 manufactured by Aicello Kagaku Co., Ltd.) with a No. 10 Meyer bar to give a thickness of 7 A micron coat film was formed. Two pieces of this film were laminated with the poly ε-caprolactone layer on the outer surface, and balloons having a diameter of 40 cm and a diameter of 5 cm were made with a heat sealer. Helium gas was injected into this 40 cm balloon and a floating test was performed, but it did not fall even after one week. Next, a similar test was carried out by spraying water onto the balloon by means of a mist blow, but it was still floating after one week. 5
Float a cm balloon on seawater in a 10 liter container at 20 ℃
2 weeks later, the polyester layer as the outer layer was decomposed, the polyvinyl alcohol layer as the inner layer was dissolved, and the balloon was disassembled into pieces by light agitation from the outside.

[0011]

[Example 2] Poly (3) with a thickness of 20 microns prepared by a casting method from a toluene solution was formed on one surface of a 40-micron-thick modified polyvinyl alcohol (Solvlon PW-40 manufactured by Aicello Chemical Co., Ltd.).
Hydroxybutyrate-co-3 hydroxyvalerate)
[ICI Biopo (trade name)] was pasted with a 10% aqueous solution of polyvinyl methyl ether to form a two-layer film. Balloons were made and tested in the same manner as in Example 1. The floating test was still floating after 1 week. In the water spray test by spraying, the floating after one week could be confirmed. As a result of the seawater decomposition test, decomposition started after 2 weeks.

[0012]

[Comparative Example 1] A floating test of a natural rubber balloon having a diameter of 30 cm and a thickness of 25 μm was carried out, and the balloon dropped in 2 days. In the decomposition test in seawater, the same conditions as in Example 1 were used, but no decomposition occurred even after 2 weeks.

[0013]

[Comparative Example 2] A balloon was made from a polyvinyl alcohol film having a thickness of 25 μm (Solvlon KA-25 manufactured by Aicello Chemical Co., Ltd.) in the same manner as in Example 1, and a floating test and a decomposition test were performed. The balloon with a diameter of 40 cm was still floating after one week. Next, when I sprayed water with a mist, it fell in a few minutes.
When a 5 cm balloon was floated on seawater, it dissolved in 2 minutes and disappeared.

[Brief description of drawings]

FIG. 1 is a perspective view showing a canned part of a balloon of the present invention.

FIG. 2 shows a plan view of the balloon of the present invention.

FIG. 3 shows a cross-sectional view of the balloon of the present invention in FIG. 2A-A ′.

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[Procedure amendment]

[Submission date] January 21, 1993

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0004

[Correction method] Change

[Correction content]

[0004]

The features of the present invention are as follows, as shown in FIGS. 1 to 3, in place of natural rubber which has not been biodegradable and does not dissolve in seawater.
Resin layer exhibiting a has and rain resistance to microbial degradation (5) water-soluble or exhibit a water dispersible and resin layer having excellent gas barrier property (4), characterized in that the biodegradability of the outer side and a resin layer showing a rain resistance, certain inner side balloon (1) made of two layers film with water soluble or exhibit a water dispersible and resin layer of a gas barrier property. Aliphatic polyester is preferable as the resin having microbial degradability and water resistance in the present invention, and polyvinyl alcohol is preferable as the resin showing water solubility or water dispersibility and gas barrier property.

[Procedure Amendment 2]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 3

[Correction method] Change

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[Figure 3] ─────────────────────────────────────────────────── ───

[Procedure amendment]

[Submission date] January 28, 1993

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] 0005

[Correction method] Change

[Correction content]

[0005] As the aliphatic polyesters used in the present invention, polyhydroxy butyric acid, polylactide,
Polyprobiolactone, poly-3-hydroxybutyrate, polyε-caprolactone, polyvivalolactone, polyethylene adipate, polyethylene azelate, polyethylene suberate, poly (3 hydroxybutyrate-
co-3 hydroxyvalerate), polyethylene sebacate and the like. Examples of natural resins include cellulose derivatives such as shellac, dammar, chitansan gum, chitosan, collagen and ethyl cellulose. The thickness range is 1 to 100 microns, preferably 5 to 50 microns. 1
If it is less than micron, pinholes are generated and water resistance is insufficient. If it exceeds 100 microns, the weight of the film increases and it is not practical and economically disadvantageous as a balloon application.

[Procedure Amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0009

[Correction method] Change

[Correction content]

As a method of forming a balloon from the above-mentioned two-layer film, a balloon is easily formed by heat-sealing with a ring-shaped brass mold whose temperature is adjusted to a constant temperature and then punching with a cutter of the same mold. Balloons of the present invention is to be used for the event, also wide for tell, can also be used balloons for small balloons and toys promotional.

[Procedure 3]

[Document name to be amended] Statement

[Correction target item name] 0011

[Correction method] Change

[Correction content]

[0011]

Example 2 Poly (3 hydroxybutyrate-co-3 hydroxy burr having a thickness of 20 μm prepared by casting from a toluene solution was formed on one side of a 40 μm thick modified polyvinyl alcohol (Solvlon PW-40 manufactured by Aicello Chemical Co., Ltd.). rate) [manufactured by ICI Biopo l (trade name)] paste a 10% aqueous solution of polyvinyl methyl ether 2
I made a layer film. Balloons were made and tested in the same manner as in Example 1. The floating test was still floating after 1 week. In the water spray test by spraying, the floating after one week could be confirmed. As a result of the seawater decomposition test, decomposition started after 2 weeks.

[Procedure amendment 4]

[Document name to be amended] Statement

[Name of item to be corrected] Brief description of the drawing

[Correction method] Change

[Correction content]

[Brief description of drawings]

FIG. 1 is a perspective view showing a canned part of a balloon of the present invention.

FIG. 2 shows a plan view of the balloon of the present invention.

FIG. 3 shows a cross-sectional view of the balloon of the present invention in FIG. 2A-A ′.

[Explanation of symbols] 1 balloon 2 gas inlet 3 heat seal part 4 inner layer 5 outer layer

[Procedure Amendment 5]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 1

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[Figure 1]

[Procedure correction 6]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 2

[Correction method] Change

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[Fig. 2]

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Claims (2)

[Claims] 1. A two-layer structure comprising an airtight, water-resistant and biodegradable resin layer on the outside and a water-soluble or water-dispersible resin layer on the inside. Characteristic balloons. 2. The balloon according to claim 1, wherein the outer resin layer is an aliphatic polyester and a natural resin, and the inner resin layer is polyvinyl alcohol.