JPS63218063A - Packaging material - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

Detailed Description of the Invention (Industrial Application Field) The present invention is applicable to packaging materials suitable for packaging rubber products such as tires for automobiles and other vehicles, and for packaging materials suitable for packaging rubber products such as tires for automobiles and other vehicles, and for packaging materials suitable for packaging rubber products such as tires for vehicles such as automobiles, The present invention relates to improvements in packaging materials suitable for packaging processed foods.

(Prior Art) In general, synthetic resin films and sheets 1 to 1 have been used as various packaging materials because they have various properties such as higher tear strength and better water resistance than paper. It is widely used as.

(Problems to be Solved by the Invention) By the way, when the object to be packaged is made of rubber, such as a tire for a vehicle such as an automobile, the object to be packaged (rubber product)
Various compounding agents such as anti-aging agents and vulcanization accelerators are added to the product during the manufacturing process. As these anti-aging agents, aromatic amine-based ones are generally used.

When this packaged object (rubber product) is packaged with a synthetic resin packaging material such as the one described above, if the packaging material is gas permeable, such as a polyethylene film or sheet, the When a package (rubber product) is stored in a packaged state for a long period of time, aromatic amines in the anti-aging agent and the like migrate to the packaging material and appear on its surface. This aromatic amine is easily discolored, resulting in a problem in which the surface of the packaging material partially turns black.

On the other hand, when the packaged object is a fruit or vegetable such as a vegetable or fruit, it is necessary to ensure adequate respiration and water evaporation in order to maintain its freshness over a long period of time.

Therefore, using polyvinylidene chloride films, etc., which have extremely low permeability to water vapor, gases, especially oxygen, as packaging materials for fruits and vegetables will stop the respiration and water evaporation effects of the fruits and vegetables, thereby ensuring longitude. It is desirable to use a film that is not preferred from above and has some degree of transparency. As the transparent film, there is a film made of polyethylene, for example, which is widely used as a general packaging material, and it is preferable to use this film as a packaging film for fruits and vegetables because it can be manufactured at a low cost.

However, this polyethylene film has significantly higher gas permeability than other films, so if fruits and vegetables are left packaged for a long period of time, the moisture in the fruits and vegetables will evaporate out of the film more than necessary. In addition, excessive infiltration of oxygen from the air excessively promotes respiration, which tends to reduce the freshness of fruits and vegetables. Furthermore, when the respiration of fruits and vegetables is promoted in this way, the amount of carbon dioxide gas generated increases, and if the concentration of carbon dioxide becomes too high, there is a risk of inducing carbon dioxide gas disorder. This is undesirable because it preserves longitude.

In addition, even after the fruit is picked from the branch, it self-generates ethylene and respires, which promotes its growth. This growth promotion decomposes the accumulated nutrients in the fruit, reducing its freshness.

In addition, when processed foods with odors such as crushed goat dumplings are wrapped in the polyethylene film mentioned above, the odor leaks out of the film, causing disgust to people nearby, or storing them in the refrigerator. If the odor has been transferred to other foods.

The present invention has been made in view of these points, and as described above, by simply adding appropriate additives to the molding material during the molding process to films and sheets made of transparent synthetic resin such as polyethylene, When the inherent permeability of amines is modified by the inclusion or occluding action of additives, and the packaged object is a rubber product, for example, aromatic amines transferred from the rubber product to the packaging material such as polyethylene. The purpose is to prevent discoloration of packaging materials due to

In addition, when the packaged object is fruits and vegetables such as vegetables and fruits, water in the fruits and vegetables may evaporate out of the film, excessive oxygen in the air may enter the film, excessively promoting respiratory action, and increasing the carbon dioxide concentration. Prevents high E content (carbon dioxide gas damage), suppresses the fruit's self-generating ethylene function, and captures the generated ethylene gas, thereby stably ensuring the freshness of fruits and vegetables over a long period of time. The purpose is to Furthermore, if the packaged object is a processed food with an odor, such as pickles or pickled vegetables, it is necessary to suppress the leakage of these odors outside the film so as not to cause disgust to people nearby. The purpose is to prevent odor from transferring to other foods when stored in the refrigerator.

(Means for Solving the Problems) In order to achieve the above object, the present invention uses a cyclodextrin having an inclusion effect as an additive.

Specifically, the solution taken by the present invention is that the packaging side bevel is made of a permeable synthetic resin to which an appropriate amount of cyclodextrin is added.

(Function) With the above configuration, in the present invention, the cyclodextrin added to the permeable synthetic resin such as polyethylene has a blocking effect due to interposition between the molecules of the permeable synthetic resin, and the formation of a film (see 1-). Due to the film-forming action caused by heating during the process, the impermeability to, for example, the compounding agent, moisture J3, and odor contained in the packaged object is improved. In general, the excessive infiltration of oxygen in the air, the optimization of the carbon dioxide concentration generated due to this (carbon dioxide gas disorder), and the optimization of the ethylene self-generation function are improved.

Furthermore, when the object to be packaged is a rubber product, such as a tire for a vehicle such as an automobile, when the compounding agent contained in the tire is about to permeate, the anti-aging agent etc. mixed in the tire manufacturing process may be absorbed. It is presumed that the aromatic amine is clathrated and captured by the cyclodextrin as a guest compound, and its migration to the surface of the packaging material is suppressed, thereby further improving the impermeability. Therefore, even if the synthetic resin constituting the packaging material is inherently transparent,
Partial blackening of the surface of the packaging material due to the aromatic amine is reliably prevented.

In addition, when the packaged object is a fruit or vegetable such as a vegetable or fruit, when the moisture in the fruit or vegetable tries to permeate, this moisture is captured by cyclodextrin as a gel compound, and the moisture is not released to the outside. It is presumed that transpiration is suppressed and impermeability is further improved. In other words, the occlusive action of cyclodextrin supplies the appropriate amount of oxygen necessary for the respiration of fruits and vegetables, but the ethylene gas generated by this supplied oxygen is captured by the cyclodextrin as a guest compound, and the ethylene gas inside the fruits and vegetables is trapped. It is presumed that the decomposition of the accumulated nutrients in the food is suppressed, thereby further preventing the deterioration of the freshness of the food. Therefore, even if the synthetic resin constituting the packaging is inherently permeable, the freshness of the fruits and vegetables can be stably ensured over a long period of time.

Furthermore, if the packaged object is a processed food with an odor, such as pickles or pickled vegetables, these odor components will be captured by the cyclodextrin as guest compounds, preventing the odor from leaking out of the film. This ensures that the odor does not cause disgust to people nearby, or that the odor transfers to other foods when stored in the refrigerator.

(Example) Examples of the present invention will be described below.

The packaging material applicable to the present invention is a film or sheet made of a synthetic resin that is inherently transparent, such as polyethylene, and the film or sheet made of a transparent synthetic resin can be formed using a general molding method. Molded by calendering, extrusion, casting, etc.

An appropriate amount of cyclodextrin (hereinafter referred to as CD) is added to the synthetic resin that is the raw material for forming the above-mentioned transparent synthetic resin films and sheets. This cyclodextrin (CD>) is a dextrin in which glucose residues are cyclically linked through α-1,4-glycosidic bonds,
As those produced industrially, α-CD, β-CD, and γ-CD consisting of 6,7,8-valent glucose residues are well known. This CD contains Bacillus macerans amylase.
mylase> or by aerobically cultivating alkaliphilic microorganisms in a suitable medium and allowing a CD-producing enzyme (cyclodextrin lycosyltransferase) to act on gelatinization or liquid starch. The amount of CD to be added to the transparent synthetic resin is set at 20 fiff% or less, preferably several fiff%, because if it exceeds 20fiff1%, it will have an adverse effect on the physical properties of the synthetic resin. Fully transparent synthetic resin film and seam at 1
It exhibits a moss effect that can modify the permeability of ~.

Using the transparent synthetic resin as a molding raw material to which CD has been added as described above, synthetic resin films and sheets as packaging materials are molded by calendering, extrusion, casting, and the like. In these synthetic resin films and sheets, the CD acts as an intervening occlusion between the molecules of the permeable synthetic resin, and also acts as a coating when heated in the process of forming a film (sheet). When the object to be packaged is a rubber product, such as a tire for a vehicle such as an automobile, compounding agents such as anti-aging agents and vulcanization accelerators that are kneaded into the raw materials during the manufacturing process of the tire are added to the synthetic resin. When transferring to a manufactured film and a sheet 1-, the composition such as the above-mentioned anti-aging agent, for example, an aromatic amine such as phenyl-α-naphthylamine, is wrapped in the annular cavity of the CD, that is, it is blended by the inclusion action of the CD. capture the composition of the agent. As a result, the impermeability to the above compounding agents can be significantly increased.

In addition, when the packaged object is a fruit or vegetable such as vegetables or fruit, when the moisture in the fruit or vegetable tries to permeate, the CD captures this moisture through the inclusion action, which significantly increases the impermeability to moisture. be able to. In general, it is possible to suppress the amount of air that attempts to enter the packaging through the clogging effect of the CD, which also makes it possible to optimize the carbon dioxide gas concentration (carbon dioxide gas disturbance) and suppress the ethylene self-generation function. In addition, the ethylene gas generated by supplying an appropriate amount of oxygen necessary for the respiration of fruits and vegetables can be captured by the inclusion action of CD, thereby preventing quality deterioration of fruits and vegetables.

In addition, when the packaged object is a processed food with an odor, such as pickles or goat cheese, in addition to improving the impermeability to moisture, it is possible to reduce odor due to the inclusion effect of CD, as in the above case. As a result of the entrapment, impermeability to odors can be significantly increased.

In addition, the CD contains other additives, such as plasticizers.
Since the stabilizer and the like are captured by its inclusion action and prevented from ejecting onto the film surface, and the CD itself is harmless to the human body, it is also preferable from the viewpoint of food hygiene.

Now, specifically, a sheet of a predetermined thickness is formed using polyethylene with 5% monomer of CD added, and a car tire is wrapped with this sheet 1- and stored in a warehouse for a long period of time. No discoloration was observed on the surface of the sheet, which remained as it had at the time of storage. However, when the sheet was removed, aromatic amines contained in anti-aging agents mixed in during the manufacturing process were found to be blown out onto the tire surface.

This proves that the above-mentioned ejected aromatic amine is included and captured by Sifurobukis 1 to phosphorus as a guest compound, and its transfer to the sheet surface is suppressed.

In addition, when a food packaging film was formed using a material containing polyethylene with 3% CD added, and fruits and pickles were wrapped in the film and left for storage, the freshness of the fruit did not decrease even after a long period of time. Moreover, the odor of pickles did not leak outside.

(Effects of the Invention) As described above, according to the packaging material of the present invention, the above-mentioned base material of the molded packaging material can be formed by a simple process of adding syphrobukis-1-phosphorus to the transparent synthetic resin of the base material. Since the inherent permeability of the material can be modified, if the object to be packaged is a rubber product such as a tire for an automobile or other vehicle, the compounding agent squirted from the rubber product during the packaging device may be used as a packaging material. It is possible to provide a packaging material that can easily prevent migration to the surface of the skin and whose appearance does not change over a long period of time.

In addition, when the packaged object is a fruit or vegetable, the freshness of the fruit etc. can be ensured for a long period of time, and when the packaged object is a processed food with an odor, the odor of the pickle etc. can be ensured. leakage to the outside can be reliably prevented.

Patent applicant: Chikaku Shoten Co., Ltd.
Shin Cho -(-↓0.・、SuHj：、
, i:z't +' , j-1 agent
Previous 1) Hiro Case; Kuchi, Hill: 1 Procedural amendment (voluntary) May 12, 1988 1. Indication of the case 1988 Patent Application No. 73793 2. Name of the invention Packaging material a. Case of the person making the amendment Relationship with Patent application Human body Location 8th floor, Yamajin Building, 1-18 Honmachi, Higashi-ku, Osaka Name Chikahisa Shoten Co., Ltd. Representative Junichi Chikahisa (and one other person) 5 Date of amendment order Voluntary amendment) 7. Contents of correction (1) In the specification IC, page 8, line 11, between “method” and “calendar processing”, “inflation processing,”
Insert.

(2J "Using" on page 9, line 14 of the specification)
and “calendering” and “inflation processing,”
” is inserted.

(3) Supplement the power of attorney as shown in the attached sheet.

8. List of attached documents (1) Power of attorney 2 copies

Claims (1)

[Claims] (1) A packaging material characterized by being formed from a transparent synthetic resin to which an appropriate amount of cyclodextrin is added.