JPH1159782A - Packaging material for transportation excellent in airtightness and resistance to chemical - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a packaging material which is excellent in airtightness and resistance to chemical and is appropriate for storing and carrying powder and granular chemical which is highly hygroscopic and corrosive. SOLUTION: The transportation packaging material P comprises a bottle- shaped inner bag 1 formed of a multi-layered resin film excellent in moisture- proofness, resistance to acid or the like and a flexible container outer bag 2 receiving the inner bag 1. The bottle-shaped inner bag 1 has a housing 3 formed in a cylinder having a large diameter, a filling port part 4 protruding above the housing 3, and an exhaust port part 5 protruding downward, while the bag is formed of a flexible multi-layered resin film with a whole of a uniform thickness. The flexible container outer bag 2 includes an inner bag housing 6 of such a size that the housing 3 of the inner bag 1 is received, is formed with an upper face through hole 8 on an upper face 7 and is formed with a bottom through hole through which the exhaust port part 5 of the inner bag 1 passes.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is excellent in airtightness and chemical resistance used for transporting, storing and transporting granular chemicals having high hygroscopicity and corrosiveness such as inorganic chlorine compounds and their anhydrides. The present invention relates to a packaging material for transportation.

[0002]

2. Description of the Related Art In general, the transportation of powdered chemicals for industrial raw materials and products takes into account the physical and chemical properties of the powdered chemicals, and is adapted to the conditions of use. Considering this, the container and transportation means are selected.

[0003] However, some of such powdered chemicals exhibit strong hygroscopicity and corrosiveness. Generally, when these powdered chemicals are left open to the atmosphere, they can be found in the air. May absorb and dissolve water (deliquescence), or the main component may be decomposed by the absorption of water, generating corrosive gases such as hydrogen chloride and reducing purity. Or corrosive to transportation means, which may shorten its life.

[0004] Therefore, in transporting such a particulate chemical having a high hygroscopicity or corrosiveness, the particulate chemical is excellent in airtightness and corrosion resistance which can prevent invasion of air and molecular moisture. It is generally performed by filling a container.

[0005] For example, anhydrous chlorine compounds such as anhydrous aluminum chloride and anhydrous iron chloride are substances having such properties, and therefore, a great deal of investigation has been made on their filling, storage and transportation. For example, countermeasures such as using a plastic that can block the intrusion of molecular moisture and have excellent corrosion resistance to hydrogen chloride gas have been taken.

For example, as a container for transporting such a substance, an iron container (iron container) made of thick steel plate for several tons is known, and the specifications of this iron container differ for each user. , Filling port and discharge port, the whole is made sturdy, the lid of the filling port and discharge port is excellent in air tightness, hard to break even in the event of accident during transportation, There are advantages of low risk, superiority in safety and the like, and ability to be used repeatedly.

However, in recent years, in addition to product quality deterioration, container corrosion prevention, and transport safety, there is a demand for efficient and large-scale logistics. In addition, there is a demand for a container that does not require any trouble during the discharging operation. For this reason, in the conventional iron container, there is a problem in that the weight of the container itself in the transport weight is large, and the efficiency is poor due to the large volume for collecting empty containers. Also, in normal product transportation in Japan, there are many types of containers that are difficult to share according to the customer's acceptance situation, and when reusing iron containers, in order to maintain the quality of the next product to be filled. To
Complicated cleaning operations such as cleaning the inside, drying, and replacing air with high humidity are required.

[0008] In addition, the use of iron containers as containers for export is less preferred. This is because similar problems as described above become more pronounced.For example, it takes time to collect empty containers, so it is necessary to deal with increasing the number of containers. This is because it is expected that the management of the container will be complicated, which will increase the cost.

As another container for transporting such a substance, a resin-lined drum can is known. This drum can has a relatively light container weight and the outside is made of a metal strength protection material. In addition to being formed, the inside is resin-lined and has corrosion resistance, which solves the problems of iron containers.

[0010] Such a drum can is relatively lightweight, is excellent in corrosion resistance and moisture resistance, and is used as a common container in Japan and overseas and is generally distributed.
It is used in a so-called one-way manner, which has the advantage of logistics because it does not require time and effort for recovery, and is particularly suitably used for export.

However, since this drum can is one-way and disposable, it becomes expensive as a packaging cost,
The filling operation is about 200 kg per can, and the number of operations per unit weight is 4 to 5 times that of an iron container.
At the time of use, a dedicated container reversing device is required, so that the workability is also low and the cost of the product is increased.

[0012] Further, various multilayer resin films are known as packaging materials having high moisture-proof properties, and are used for packaging small quantities of several hundred grams, such as foods, portable heaters (disposable warmers) and the like. However, packaging with these multilayer resin films requires film thickness, strength, flexibility,
There are various practical problems such as the possibility of bag making and the difficulty of obtaining sheets of the size required for packaging materials. However, it is difficult to apply to large-sized packaging and transportation in units of tons, and it has not yet achieved all of the performance and functions equivalent to conventional transportation containers.

[0013] As a medium-sized packaging material having excellent moisture-proof properties for packaging powdered granules in units of tens of kilograms having a high hygroscopicity, a resin film such as polyethylene or polyvinyl chloride may be used. Paper bags of a multilayer film in which vinylidene chloride or aluminum foil and paper are laminated are known (JP-A-55-19522, JP-A-62-78).
059 and JP-A-63-178949). However, this type of paper bag using an aluminum foil cannot be used as a packaging material for such a substance because the aluminum foil is corroded because a resin film such as polyethylene or polyvinyl chloride transmits hydrogen chloride or the like. Further, this type of paper bag using polyvinylidene chloride has high moisture resistance, but the strength of the bag itself is low, so that it can be used for a 20 to 30 kg wrapping bag, but a larger weight, for example, 1 to 2 It cannot be used as a container for tons, and it is not suitable for substances that absorb moisture and generate gas, because the work of opening and charging the bag at the time of discharge is manual.

[0014]

Therefore, the present inventor has proposed:
It has excellent air-tightness and chemical resistance, and it is convenient for handling such as filling and discharging, and is suitable for mass transportation. As a result of intensive studies to develop a transport packaging material used for transporting, storing and transporting chemicals, this transport packaging material was formed into a double structure consisting of a bottle-type inner bag and a flexible container outer bag, In addition to expressing the air tightness and chemical resistance in the bottle-type inner bag, and finding that the purpose can be achieved by imparting strength that can withstand handling such as transport, storage, and transport in the flexible container outer bag,
The present invention has been completed.

Accordingly, an object of the present invention is to provide an airtightness and chemical resistance, which are suitable for transporting, storing and transporting granular chemicals which are highly hygroscopic and corrosive, such as inorganic chlorine compounds and their anhydrides. It is to provide a packaging material for transportation.

Another object of the present invention is to provide a large packing amount per unit of packaging, easy collection and reuse of containers, and a small weight of the container relative to the weight of the product, which is suitable for mass transportation. It is to provide a packaging material for transportation.

[0017]

That is, the present invention provides a bottle-type inner bag formed of a multilayer resin film having excellent moisture-proof, acid-resistant and gas-barrier properties, It is a transport packaging material excellent in hermeticity and chemical resistance characterized by being configured in combination with a flexible container outer bag excellent in strength.

In the present invention, the bottle-type inner bag has a shape that is gradually narrowed from the center of the bag to the lower outlet so that the entire amount of the contents is smoothly discharged. In order to prevent the deterioration of the contents and the diffusion of the generated hydrogen chloride gas to the outside, the multilayer resin film forming the bottle-type inner bag should have at least a moisture-proof, acid-resistant and gas-barrier resin. It is necessary to have a film layer (A). Examples of the resin film layer (A) include polyvinylidene chloride, high-density polyethylene, polyethylene vinyl alcohol, and polypropylene. Particularly, polyvinylidene chloride, high density polyethylene, and polyethylene vinyl alcohol are preferred.

The multilayer resin film forming the bottle-type inner bag is formed by laminating a sealing resin film layer (B) on both sides of the resin film layer (A) for sealing such as heat sealing. Alternatively, a reinforcing resin film layer (C) may be attached to the outer surface of the sealing resin film layer (B) located on the outside for the purpose of reinforcing the entire multilayer resin film. When used as a packaging material for a small amount that can be used up immediately with contents having relatively low hygroscopicity, the sealing resin film layer (B) may not be present, but the moisture proofness is completely improved, and In order to completely prevent the occurrence, it is preferable that a sealing resin film layer (B) is present, and further it is desirable to provide a reinforcing resin film layer (C) to prevent breakage.

Such a sealing resin film layer (B)
Examples of the resin for forming a low-density polyethylene include low-density polyethylene, polyvinyl chloride, and polypropylene. Low-density polyethylene is particularly preferable from the viewpoint of multilayering with other films. Examples of the resin constituting the reinforcing resin film layer (C) include, for example, PE
T resin and the like.

The resin film layer (A) preferably has a thickness of preferably 30 to 100 μm from the viewpoint of moisture resistance, and the sealing resin film layer (B) is easily heat-sealed. 20 to 1
The thickness is preferably 00 μm, and the thickness of the reinforcing resin film layer (C) is suitably determined in consideration of the strength of the bag and the ease of opening and closing.

The outer bag of the flexible container used in the present invention basically has a shape capable of wrapping a bottle-type inner bag filled with contents and supporting the weight of the contents, and has an upper surface portion thereof. It has a through hole at the top and bottom through which the filling port and the discharge port of the bottle-type inner bag penetrate on the bottom and the bottom, and has a hanging tool used for transportation and loading, such as polypropylene, rubber, etc. It is made of such a tough material as to have sufficient strength to withstand such operations as lifting the bottle-type inner bag during operations such as storing, transporting, handling, and discharging the product while storing the bottle-type inner bag. Preferably, the upper part is open, and the bottle-type inner bag can be easily inserted from the upper part, and the bottom part has an opening for discharging the bottle-type inner bag. From the bottle type The outlet of the bag bottom is exposed downward,
It is preferable to be able to discharge the inorganic chlorine compound and its granular chemicals such as anhydrides filled in the bottle-type inner bag from the outlet.

In the packaging material for transport of the present invention, for example, when the multilayer resin film constituting the bottle-type inner bag has a resin film layer (B) for sealing, first, the outlet of the bottle-type inner bag is heated. Sealing, then incorporating the bottle-type inner bag into the flexible container outer bag, and letting the outlet of the bottle-type inner bag project outside from the bottom through hole of the flexible container outer bag, and in this state, the opening edge of the bottom through hole Attach the opening edge of this bottom through-hole to the discharge opening of the bottle-type inner bag with a tying tool made of a thin string or velvet fastener, etc., provided between the bottle-type inner bag and the flexible container outer bag. After fixing, fill the contents from the filling port of the bottle-type inner bag, heat-seal the filling port, seal it, and place the filling port on the flexible container outer bag in the same way as the discharge port. Protruded outside from the through hole to fix between the bottle-type bag and the flexible container outer bag in enclosed wearing tool provided at the opening edge. With such a configuration, even when the heat-sealed portion of the outlet of the bottle-shaped inner bag is cut when dispensing the contents, the contents are immediately discharged from the outlet by the tying member. And the payout operation can be performed more safely.

[0024]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a packaging material for transportation according to the present invention.

FIGS. 1 to 4 show a transport packaging material P according to an embodiment of the present invention. The packaging material P for transport includes a bottle-type inner bag 1 formed of a multilayer resin film having excellent moisture-proofness, acid resistance and gas barrier properties, and a flexible container outer bag 2 for storing the bottle-type inner bag 1. It is composed of

As shown in FIG. 2, the bottle-type inner bag 1 has a storage part 3 formed in a substantially central part in a cylindrical shape having a relatively large diameter, and a cylindrical part protruding upward above the storage part 3. A filling port 4 formed in a shape, and a discharge port 5 formed in a cylindrical shape protruding downward at a lower portion of the storage section 3.
The whole is formed of a flexible multilayer resin film having a uniform thickness.

The flexible container outer bag 2
As shown in FIGS. 1, 3 and 4, the size is such that the storage portion 3 of the bottle-type inner bag 1 fits perfectly therein (ie, an inner diameter approximately the same as the diameter of the storage portion 3). An inner bag receiving portion 6 having an inner bag receiving portion 6 is provided. An upper surface through hole 8 through which the filling port 4 of the bottle-type inner bag 1 penetrates is formed in an upper surface portion 7 of the inner bag receiving portion 6. A bottom through-hole 10 through which the outlet 5 of the bottle-type inner bag 1 penetrates is formed in the bottom surface 9 of the bag housing portion 6, and the bottle-type inner bag 1 is stored in the flexible container outer bag 2. When the bottle-type inner bag 1 is filled with a granular chemical such as an inorganic chlorine compound and an anhydride thereof, the container 3 of the bottle-type inner bag 1 fits perfectly in the inner bag container 6, The filling port 4 and the discharge port 5 of the inner bag 1 are connected to the outer bag 2 of the flexible container.
Are projected to the outside from the upper surface through-hole 8 and the bottom surface through-hole 10, respectively, and are exposed.

In this embodiment, the outer surface of the outer bag 2 of the flexible container is provided with a suspending member 11 composed of a suspending belt 11a and a suspending rope 11b for carrying out operations such as lifting during transportation, handling, product discharge and the like. And the top through-hole 8 and the bottom through-hole 1
In FIG. 2, the bottle-type inner bag 1 is wrapped around the filling opening 4 and the discharge opening 5 of the bottle-type inner bag 1 that penetrates through the upper surface through-hole 8 and the bottom surface through-hole 10 at the opening edge. A tying tool 12 for fixing the bag 2 to the bag 2 is provided.

[0029]

【Example】

Example 1 As shown in FIG.
m, a low-density polyethylene layer a having a thickness of 102 μm having excellent gas barrier properties, a low-density polyethylene layer c having a thickness of 20 μm having adhesiveness, and a thickness having excellent strength. 12μm reinforcing P
The ET resin layers d were sequentially laminated to prepare a multilayer resin film, and the bottle-type inner bag 1 shown in FIG. 2 was manufactured using the multilayer resin film.

The bottle-type inner bag 1 is inserted into the flexible container outer bag 2 shown in FIGS. 3 and 4, the lower end of the outlet 5 of the bottle-type inner bag 1 is closed by heat sealing, Material P was manufactured.

The packaging material P thus obtained is filled with 1000 kg of anhydrous aluminum chloride (99.7%) through the filling port 4 of the inner bag 1 of the bottle, and the air in the inner bag 1 of the bottle is filled. Was removed by suction, and then the filling port 4 was heat-sealed and sealed.

After that, it is hoisted by a crane using the hanging member 11 provided in the outer bag 2 of the flexible container, put on a pallet, transported to an indoor warehouse by a forklift, and stored in a closed room for 3 months. The surrounding hydrogen chloride odor was sometimes checked periodically, and three months later, the discharge port 5 was cut, and the anhydrous aluminum chloride inside was discharged to another container. The dischargeability and the purity of the anhydride were measured.

As a result, in addition to being excellent in the transportability of lifting and transporting, the odor of hydrogen chloride is not sensed at all during storage, and the dischargeability at the time of dispensing is discharged in 2 to 3 minutes, and In the bottle-type inner bag 1, there was almost no adhesion of anhydrous aluminum chloride, which was very good, and the purity was the same as that at the time of filling, and no moisture absorption was observed.

Example 2 As shown in FIG. 6, a thickness of 60 μm excellent in gas barrier properties
a high-density polyethylene layer e having a thickness of 40 m and a heat-sealing low-density polyethylene layer a having a thickness of 40 µm laminated on the center and a multilayer resin film to prepare a bottle-type inner bag 1 Manufactured the packaging material P for transport in the same manner as in Example 1 above.

With respect to the transport packaging material P of Example 2, a test was conducted in exactly the same manner as in Example 1 above. As a result, the same good results as in Example 1 were obtained. An operation of charging the reactor using the anhydrous aluminum chloride as a catalyst was performed. The time required to lift and charge 2000 kg was 20 minutes per bag, for a total of 40 minutes.

Comparative Example 1 An operation of charging a reactor using anhydrous aluminum chloride as a catalyst was performed using a conventional drum filled with 250 kg.
In the case of a drum, the lid was opened, a jig was attached, and the drum was lifted up to the charging port of the reactor, and then inverted and charged. The charging time required at this time is 25 minutes per one, and 20
It took a total of 3 hours and 20 minutes to feed 00 kg.

[0037]

The packaging material for transportation of the present invention has no moisture permeation during transportation, storage and transportation of highly hygroscopic and corrosive powdery chemicals such as inorganic chlorine compounds and their anhydrides. There is no decomposition of contents or generation of acidic hydrogen chloride gas.In addition, the weight of the packaging material is light, the outer bag can be easily collected and used, and it is inexpensive and has good transport efficiency. Can also be used, and the efficiency of filling and discharging products is also high.

[Brief description of the drawings]

FIG. 1 is a perspective explanatory view of a transport packaging material according to an embodiment of the present invention.

FIG. 2 is an explanatory perspective view showing a bottle-type inner bag used in the transport packaging material of FIG. 1;

FIG. 3 is an explanatory plan view showing a flexible container outer bag used in the transport packaging material of FIG. 1;

FIG. 4 is an explanatory bottom view showing the outer bag of the flexible container of FIG. 3;

FIG. 5 is an explanatory cross-sectional view of a multilayer resin film for manufacturing a bottle-type inner bag of a packaging material for transport according to an embodiment of the present invention.

FIG. 6 is an explanatory cross-sectional view of a multilayer resin film for manufacturing a bottle-type inner bag of a packaging material for transport according to another embodiment.

[Explanation of symbols]

P: packaging material for transportation, 1: bottle-type inner bag, 2: outer bag of flexible container, 3: storage unit, 4: filling port, 5: discharge port, 6: inner bag container, 7: upper surface, 8 ... top surface through hole, 9 ... bottom part, 10 ... bottom surface through hole, 11 ... hanging tool, 1
1a: hanging belt, 11b: hanging rope, 12: tying tool, a, c: low density polyethylene layer, b: polyvinylidene chloride layer, d: PET resin layer, e: high density polyethylene layer.

Claims (7)

[Claims] 1. A bottle-type inner bag formed of a multilayer resin film having excellent moisture-proof properties, acid resistance, and gas barrier properties, and a flexible container outer bag containing the bottle-type inner bag and having excellent strength. A packaging material for transportation having excellent airtightness and chemical resistance characterized by being configured in combination. 2. A multilayer resin film forming a bottle-type inner bag comprises a resin film layer (A) having excellent moisture-proof, acid-resistant and gas-barrier properties and a sealing resin film layer (B) bonded on both sides thereof. 2. The packaging material for transportation according to claim 1, which is excellent in airtightness and chemical resistance. 3. A multilayer resin film forming a bottle-type inner bag comprises a resin film layer (A) having excellent moisture resistance, acid resistance and gas barrier properties, and a sealing resin film layer ( 2. The transport package according to claim 1, comprising: B) and a reinforcing resin film layer (C) bonded to the outer surface of the outer resin film layer (B). Wood. 4. The packaging material for transportation according to claim 2, wherein the resin film layer (A) is polyvinylidene chloride, high-density polyethylene, or polyethylene vinyl alcohol. 5. The transport packaging material according to claim 2, wherein the resin film layer (B) is a low-density polyethylene. 6. The transport packaging material according to claim 3, wherein the resin film layer (C) is a PET resin. 7. The airtightness and chemical resistance according to claim 1, wherein the outer bag of the flexible container has an opening at the top and an opening at the bottom for the outlet of the bottle-type inner bag. Excellent transport packaging material.