JPH06100043A - Transport for moisture absorbing substance - Google Patents

Abstract

PURPOSE:To prevent the quality from decreasing and the shape from being deformed by a method wherein for a packaging of powder amino acid, etc., a moisture absorbing substance is contained in an interior package formed of a moisture-proof plastic laminated film with an internal layer of a vapor deposited layer of a plastic film for which silicon oxide is vapor-deposited, and after the interior package is sealed, the interior package is put in an exterior box. CONSTITUTION:Silicon oxide SiOx (x is 0-2) is vapor-deposited on a plastic film of polyester, etc. On the silicon oxide vapor-deposited plastic film, a heat- weldable plastic film with a single layer with at least one unit or multi-layer, e.g. a polyethylene film is laminated by a polyurethane adhesive, with the vapor deposited layer of the silicon oxide vapor-deposited plastic film to be the inner layer, and a moisture-proof film laminated film is formed. An interior package is formed of the moisture-proof film laminated film, and a moisture absorbing substance is put in the interior package, and after being sealed, the interior package is put in an exterior box of a fiber drum, etc.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to foods and pharmaceuticals, and particularly to packaging of powdered amino acids. The present invention relates to a method for transporting substances that cause changes in properties and quality due to moisture absorption or permeated oxygen for food and medicine.

[0002]

2. Description of the Related Art The performance required for a packaging material varies depending on the object to be packaged. For example, in the case of foods, various performances are required, such as suppressing the permeation of oxygen to prevent deterioration of quality, preventing moisture absorption and solidification due to water permeation, preventing outgassing of carbonated drinks, attaching offensive odors, and eliminating aroma (off-flavor). To be done.

20 amino acids used for food and medicine
There are several types. Various properties are required as a material for packaging amino acids due to their respective properties. For example,
It shows different properties such as amino acids whose quality is easily deteriorated by oxygen or amino acids that are easily solidified by water. In medical use, a plurality of kinds of these amino acids are mixed and used in many cases, and their handling methods are relatively common. In addition, if it is set up on the production side, the packaging process is almost the same, and in many cases, the same material is used for packaging in terms of management of the packaging material. From this point of view, the materials currently used are also packed with materials that are almost common to amino acids. A material mainly made of polyethylene and an aluminum foil applied thereto, or a material obtained by combining them is generally used. However, a film (laminate) coated with aluminum foil is expensive, and a large amount may cause a problem when discarding it.

Amino acids are widely used as raw materials for pharmaceuticals, and their supply has become Japan's important source of supply worldwide. When they are transported, the interior is packed in a plastic bag and the exterior is handled in a double-wrapped state in a durable paper container or metal can. In many cases, aluminum foil is laminated on the inner surface of the exterior fiber drum to prevent moisture absorption. Further, from the viewpoint of improving the sealing performance, the joining of the upper and lower surfaces is often provided with a metal winding portion from the viewpoint of strength and sealing performance. However, the aluminum foil and the metal winding portion have an inconvenient structure from the viewpoint of discarding or recycling the packaging material after use, and the user desires a package made of a material having no such composition. In particular, recently, in order to make effective use of resources, a structure suitable for recycling is required, and at the same time, manufacturers and distributors are obliged to collect and recycle these packaging wastes industrially generated in Germany and Europe. If the content is low, various packaging materials have already been used,
When the content is on the order of several kg to hundreds of tens of kg, strength and quality retention during transportation become problems, and there are few practical materials. Polyvinylidene chloride and aluminum foil are known as materials for blocking both moisture and oxygen. Further, since polyvinyl alcohol has a low oxygen permeability, a material having a low water permeability laminated on both sides thereof is used.
Polyvinylidene chloride and aluminum foil are used not only by themselves but also in the form of laminated films to impart sealing properties.

Although packaging materials using a material obtained by vapor-depositing a metal on a plastic film have already been widely and commercially used as these packaging materials, these films are generally opaque. Depending on the place of use, there is a demand for a transparent material having low oxygen and water permeability, which is not affected by temperature and humidity, and which does not generate harmful substances or a large amount of ash in the environment due to incineration after use. A film deposited with silicon oxide was developed to satisfy this condition. For example, Japanese Examined Patent Publication No. 53-12953, JP-A-1
-252768 is a patent application relating to the production and use of a silicon oxide vapor deposition film. There are applications and publicly known documents such as a method for producing a silicon oxide vapor-deposited film and a method for producing a processed film, but there is no publicly known document regarding a moisture-proof packaging by combining a silicon oxide vapor-deposited film and another container for heavy items.

The performance required for the packaging material varies depending on the object to be packaged. For example, in the case of foods, various performances such as suppressing oxygen permeation to prevent deterioration of quality, preventing moisture absorption and solidification due to water permeation, preventing outgassing of carbonated drinks, attaching offensive odors and deodorizing aroma (off-flavor) can be achieved. Required.

Various materials can be selected for small capacity, small weight moisture-proof or oxygen-proof packaging, but there are few suitable materials for packaging heavy goods. In particular, in order to wrap contents exceeding 10 kg, the strength of the packaging container, easy disposal after use, handling in the storage / distribution process, etc. are necessary requirements. Raw materials or products for foods and pharmaceuticals need to be stored and moved for final packaging or formulation, processing. In this case, the packaging unit can exceed 10 to 100 kg, sometimes 200 kg, and the container is a metal. Drum cans, fiber drums, plastic cans, etc. are used. However, the recycling and disposal of used packaging materials are becoming a social issue. In some countries it is the responsibility of the seller to dispose of waste packaging materials. Considering these points, it is desired that the packaging material used is composed of a single material rather than the composite material, that the volume can be easily reduced, and that the material composition can be easily recycled or disposed of.

[0008] For example, amino acids, which are raw materials for pharmaceuticals, are used for infusions and various preparations. The amino acids are usually transported by packing polyethylene bags in the interior and putting them in fiber drums. . The packaging unit is generally 30 to 100 kg. The period from packaging to use is relatively long, and it is expected that the quality will deteriorate due to moisture absorption during storage and transportation, or oxygen in the air. To prevent this, the interior of the fiber drum can is laminated with aluminum foil to suppress moisture absorption and oxygen permeation. The used fiber drum can has a large capacity and is practically used only once. And since aluminum foil is laminated on the inner surface, it is difficult to use as a paper recycling system. In addition, the aluminum foil remains even after incineration, and the disposal of incinerated ash becomes a problem. In the case of amino acids, since the manufacturing factories and the factories that use the amino acids are relatively small and concentrated, it is easy to recycle the used fiber drum as paper. Since it is recycled as paper, it is convenient that the upper and lower parts (wackers) of the fiber drum can be free of metal.

[0009]

[Problems to be Solved by the Invention] Resource saving, effective use of resources, reduction of environmental load, deterioration of product quality during transportation / storage, and prevention of water permeation to prevent property changes, are used. In addition, it is to develop a long-distance transportation method that is effective for large packages.

[0010]

Means for Solving the Problems The inventors of the present invention have made extensive studies in view of the problems to be solved, and as a result, a plastic film vapor-deposited with silicon oxide was used, and a multi-layer film having the same was used as an inner bag. By storing the substance, and then sealing the inner bag, and then storing the substance in the outer box and transporting the substance, the hygroscopic substance can be safely transported to the destination without being deteriorated during transportation, and the present invention is achieved. Completed

That is, according to the present invention, a hygroscopic substance is placed in an inner bag made of a moisture-proof plastic laminated film having the silicon oxide vapor-deposited layer of the plastic film on which silicon oxide is vapor-deposited as an inner layer, and then the inner bag is sealed. After that, the method of transporting a hygroscopic substance is characterized in that the inner bag is then housed in an outer box.

As the plastic film used in the present invention, in addition to polyester, biaxially stretched polypropylene film, biaxially stretched nylon film and the like are used.

The silicon oxide used in the present invention is represented by the general formula SiOx, where x is 0-2, but the vapor deposition is easy,
From the viewpoint of the presence or absence of coloring and the physical properties, a compound in which x is 1.0 to 1.5 is preferable. It is possible to prepare a SiOx ingot by oxidizing silicon waste discharged during IC manufacturing and use this.

A polyurethane-based adhesive is preferably used as the adhesive used in the present invention, but the adhesive is not limited thereto. Polyurethane adhesives include Ad-900 / RT (solvent type) and Ad-610A / manufactured by Toyo Morton.
C (aqueous type) can be used.

The moisture-proof plastic laminated film used in the present invention comprises a plastic film on which silicon oxide is vapor-deposited and at least one unit of a single-layer or multi-layer heat-sealable plastic film, both of which are adhesive. Are adhered by. When laminating a plastic film on which silicon oxide is vapor-deposited and a heat-welding film, the silicon oxide vapor-deposited layer and the heat-welding film are dry-laminated.

Examples of the heat-welding film include polyethylene film and polypropylene film.
Of linear polyethylene (LLDP) among polyethylene films from the viewpoint of strength and breaking strength.
E) is preferably used. Further, when physical properties such as puncture strength are required, a plastic film that meets the required physical properties may be laminated using the above-mentioned adhesive, instead of the heat-welding film. In this case, the preferable film constitution includes the following examples. There are silicon oxide vapor-deposited plastic films / adhesives / plastic films / adhesives / heat-fused films and plastic films / silicon oxide vapor-deposited plastic films / adhesives / heat-fused plastic films.

The hygroscopic substances effectively protected by the present invention include hygroscopic seasonings, vitamins, hygroscopic chemical substances, amino acids and the like. Speaking of amino acids, there are various properties such as those that are highly hygroscopic, those that are easily affected by oxygen, those that are easily affected by carbon dioxide gas, etc. It can be said that it is an extremely excellent packaging material for amino acids because it has no effect. Typical examples of amino acids exhibiting these properties are highly water-absorbing amino acids: proline, arginine, etc. Oxygen-sensitive amino acids: methionine, cystine, etc. Carbon dioxide-sensitive amino acids: arginine, histidine, etc. Amino acids: amino acid hydrochlorides, aspartic acid, etc. Amino acids showing basicity: arginine, histidine, etc.

While aluminum foil has excellent moisture resistance and oxygen impermeability, glass also has these properties. The silicon oxide film of the present invention is compositionally similar to glass, and its properties are also similar to glass. It also has excellent properties not found in aluminum foil, such as being transparent and capable of being heated by a microwave.

[0019]

EXAMPLES The present invention will be specifically described below based on examples. Moisture permeability test of silicon oxide vapor deposition film. 40
The moisture vapor transmission rate at 90 ° C. and 90% RH is as follows. The test method is JIS-Z0222 (oxygen is ASTM 143
According to 4). Sample 1: Silicon oxide 500 angstrom / polyethylene terephthalate film (PET) 12μ Moisture permeation rate 2g / m2 day, oxygen permeation rate 1.5ml / m2 day atm Sample 2: Sample 1 / Adhesive / LLDPE 60μ Moisture permeation rate 0.4g / M2 day, oxygen transmission rate 0.6ml / m2
Day atm Sample 3: Medium density polyethylene 100μ (LLDPE: Linear low density polyethylene) Water permeation rate 5g / m2 day, Oxygen permeation rate 880ml / m2 day atm

[0020]

[Example 1] Fiber drum as an exterior (diameter 430 m / m x
High 630m / m) round shape, packed in plastic bag (790m / m x 1250m / m) of sample 6 with 3 kinds of amino acids (L-arginine hydrochloride, L-proline, L-lysine acetate) It was preserved and transported in Kyushu / Saga-Kanagawa / Kawasaki. For one month after filling, the products were stored in a warehouse at a manufacturing site in Kyushu in 5 layers, and then transported by truck to Kawasaki. Sample 6: polyethylene bag of sample 3 on the inside, sample 2 on the outside
As a result, no deformation or damage of the fiber drum was observed. No external deformation such as solidification of the contents was observed.

[0021]

Comparative Example Based on Example 1, Samples 4 and 5 were prepared. Sample 4: Two polyethylene bags stacked on sample 3 / all-fiber drum Sample 5: Two polyethylene bags stacked on sample 3 / Internal aluminum foil laminate, metal drum around upper and lower body, and metal drums around upper and lower canopies As a result, The fiber drum was not deformed or damaged, but the contents were solidified.

[0022]

Example 2 An actual transportation test was conducted on the sample of Example 1. After shipping from Japan to Singapore and Hamburg via the Suez Canal by sea, we immediately shipped it to Narita by air and examined the condition of the contents. The number of samples used in the transportation test was 36. As a result of the transportation test, no major abnormality such as large solidification of the contents, deformation of the container such as buckling, breakage of the inner bag, peeling of the seal, etc. was observed. It was incinerated and produced no industrial waste.

Comparative Example 2 Samples 4 and 5 were tested as in Example 2. Sample 5 had small caking and sample 4 had large caking. No particular abnormality was found in the fiber drum itself.

[0023]

Example 3 The sealing method for the sample of Example 1 was examined. As a result, no difference was found between the heat sealing method and the rubber band sealing method. The rubber band was sealed by tying the inner bag and the outer bag with a rubber band.

[0024]

[Example 4] The influence of the contents and the laminate film obtained by laminating the silicon oxide vapor deposition film and LLDPE was examined. The contents were packed with L-arginine as a basic substance, L-cystine hydrochloride monohydrate and L-aspartic acid as an acidic substance, and after heat-sealing under high temperature and high humidity 44 ° C-78
%) And the state of the laminate was measured. The pH values of the aqueous solutions of L-arginine, L-cystine hydrochloride monohydrate and L-aspartic acid were 11.
4, 1.7, and 3.0 were shown.

As a result, in a laminate film bag filled with amino acids of L-arginine, L-cysteine hydrochloride monohydrate and L-aspartic acid, the silicon oxide vapor-deposited film and the LLDPE surface were kept for 1 to 3 weeks. Delamination did not occur and peeling was impossible.

[0026]

Industrial Applicability By carrying out the present invention, it becomes possible to store and transport a substance which is easily affected by moisture absorption or oxygen without substantially exerting these influences, and the fiber drum can after use is a paper resource. As a result, it becomes easier to recycle, and the effective use of resources and the load on the environment are reduced.

Front page continuation (72) Inventor Noriko Watanabe 1-1 Suzuki-cho, Kawasaki-ku, Kawasaki-shi, Kanagawa Ajinomoto Co., Inc. Kawasaki Plant

Claims (5)

[Claims] 1. A hygroscopic substance is contained in an inner bag made of a moisture-proof plastic laminated film having the silicon oxide vapor-deposited layer as an inner layer of a plastic film on which silicon oxide is vapor-deposited, and then the inner bag is sealed. A method for transporting a hygroscopic substance, characterized in that the inner bag is then housed in an outer box 2. The method for transporting a hygroscopic substance according to claim 1, wherein the plastic film is polyester. 3. A moisture-proof plastic laminated film comprises a plastic film on which silicon oxide is vapor-deposited and at least one unit of a single-layer or multi-layer heat-sealable plastic film, both of which are adhered by an adhesive. The method of transporting a hygroscopic substance according to claim 1. 4. The method for transporting a hygroscopic substance according to claim 1, wherein the hygroscopic substance is a food, a medicine, a raw material for a drug, or an amino acid. 5. The method for transporting a hygroscopic substance according to claim 1, wherein the outer box is a fiber drum.