JPS63168342A - Manufacture of packaging material for food - 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 Field of Application) The present invention relates to a method for producing a food packaging material.

The present invention is applicable to various foods, especially those that change rapidly over time and are difficult to maintain freshness such as meat, seafood, and frozen foods, or those that are exposed to steam or heat such as freshly baked bread or freshly steamed manzu. New packaging materials can be used to freely package foods that are previously impossible or extremely difficult to package, such as foods that cannot be packaged in their freshly prepared state due to the occurrence of It concerns a new method for highly efficient and industrial production.

Therefore, the present invention is widely used in the food packaging industry and various technical fields of the food industry.

(Conventional technology) Raw meat and seafood ooze meat juices.

It becomes stale over time, and it is simply impossible to preserve it in a fresh state for a long time through packaging.

Furthermore, when frozen foods are thawed, meat juices etc. ooze out, and when they are further frozen, the packaging material sticks to them, making it difficult to preserve them well.

On the other hand, it was completely impossible to preserve hot foods that generate steam, such as freshly baked bread or freshly steamed zucchini, for long periods of time in their packaging. .

The present invention makes this possible for the first time in the latter case, and also makes it possible to absorb meat juices etc. in the former case.

This technology has succeeded in industrially and efficiently manufacturing a new packaging material that does not stick even when frozen and can be stored as fresh as possible. It is completely unknown and new in industry and in the packaging industry.

(Problem to be solved by the invention) For example, in the case of normal food packaging.

When using raw meat or fresh seafood, release a little bit of the juice.

The area where the juice is applied changes its quality. Therefore,
Currently, it is wrapped in juice-absorbing material such as pulp for easy packaging. However, if the food is packaged with an absorbent material, the juice will still come into contact with meat, seafood, and this is not preferable.

Furthermore, when meat, seafood, and frozen foods are packaged and frozen, the packaging material and the food adhere strongly to each other, making it difficult to remove them, which is very problematic.

In addition, hot foods that generate steam, such as freshly baked bread, are conventionally packaged in plastic film bags, but these conventional packaging systems cannot keep them warm. Of course, if the bag is left sealed, the water vapor inside the bag will condense and the bread or other food will get wet, losing its commercial value.Therefore, it is now unavoidable that freshly baked bread is left to cool. The products are then packaged in bags or put into a single bag, opened for a while, and then sealed, but this takes time to package and unavoidably lengthens the manufacturing process.

(Means for Solving the Problems) The present invention provides: 1. A new packaging that can maintain and package all foods, including not only ordinary foods but also foods that are impossible or extremely difficult to package as described above, without deteriorating their quality. This was done to develop a new method for efficiently manufacturing materials industrially.

1. Structure of food packaging material manufactured by the method of the present invention
An example is shown in FIG. 1; in other words, a method for efficiently manufacturing such a packaging material is the subject of the present invention.

This packaging material has an aluminum vapor-deposited layer A and an additive layer B, to which an aluminum layer a and a waterproof heat insulating material layer a2 are attached.

The basic structure is a three-layer structure consisting of a water-permeable material layer C and a water-permeable material layer C.

The aluminum laminate layer A is formed by depositing an aluminum layer a1 and various waterproof and heat insulating layers a2.

Commercially available products can be used as appropriate, and examples of waterproof and insulating materials include: polyvinylidene chloride, hydrochloric acid rubber, and polyethylene.

Cellulose acetate, polyvinyl chloride, cellophane,
Plastic sheets such as polyester, polycarbonate, polyamide, polypropylene, vinylon, polyvinyl alcohol, polyurethane, and polystyrene that do not allow heat or water to pass through can be used as appropriate.

In addition, in order to further enhance the heat-insulating effect, the heat-insulating effect can be further enhanced by forming a foam such as styrofoam, using a honeycomb structure, or providing a hollow portion. In addition, paper products with a honeycomb structure and soft corrugated paper can also be used. Moreover, these laminates can also be used if necessary.

Of course, any material other than those mentioned above can be used as long as it has waterproof and/or heat-insulating properties.

Various substances are appropriately used as additives constituting additive layer B, and as described later, according to Honzuke, all additives such as liquids and solids necessary for preserving and maintaining food can be freely used. The present invention is also outstanding in this respect.

Examples of additives include water absorbing materials; metal powders such as aluminum;
Examples include activated carbon, ion exchange resin; antiseptic and anti-piping material; moisturizing and cold insulating material; heat insulating material; odor absorbing material; stabilizer; emulsifiers such as ethylene vinyl acetate and urethane, 5 flavoring materials, and others.

Further, for example, silica gel is used as a water-absorbing material.

Charcoal, starch, activated alumina, anhydrous calcium sulfate.

In addition to anhydrous calcium chloride, calcium oxide, agar, and other chemical moisture-absorbing materials, the following moisture-absorbing polymers can be used: starch-acrylic acid graft copolymers, polyacrylates, vinegar-vinyl acrylates, etc. Polymer, isobutylene-maleic anhydride copolymer, PVA-maleic anhydride copolymer, starch-acrylonitrile graft polymer, polyethylene oxide system, polyacrylonitrile hydrolyzate.

CMC crosslinked products and others are used, and highly polymerized sodium polyacrylate crosslinked products (with or without admixture of starch) can also be used advantageously.

Examples of the water-permeable material constituting the water-permeable material layer C include absorbent paper, tissue paper, pulp, felt pulp, paper or processed products thereof, and natural or synthetic nonwoven fabric.

Highly polymerized sodium polyacrylate crosslinked products and laminates of the same or different types of these are used. Further, as the water-permeable material, polyethylene, polypropylene, polyvinyl acetate, ethylene vinyl acetate, etc. may be surface-adhesively processed into a porous film, or a porous film of these resins may be adhesively processed on the surface of the moisture-absorbing material.

The present invention is a method for manufacturing such a packaging material, but this packaging material has completely different properties.

Since it consists of layers B and 0, it is not only difficult to bond them together, but also, especially in the present invention, various types of Moreover, since it uses liquid or solid additives, which can be called completely foreign substances, it is extremely difficult to apply this B layer, and these difficulties were solved for the first time in Honzuke.

In other words, the present invention has a major feature not only in that it manufactures a packaging material having a novel configuration and structure, but also in that it employs very large and delicate innovations in the manufacturing method itself.

FIG. 2 shows an embodiment of the present invention, and the present invention will be described in detail with reference to this figure.

81 consisting of polyester or polypropylene film
A commercially available aluminum vapor-deposited film A obtained by laminating 82 layers of aluminum foil and 82 layers of aluminum foil is led out from the A material roll 1 to the additive coating roll 2. An additive tank 3 is provided at the bottom of the coating roll 2. In the tank 3, toluene, ethyl acetate and other known organic solvents; polyethylene powder, vinyl chloride, vinyl acetate, ethylene vinyl acetate, urethane, etc. In addition to synthetic resins, known adhesives such as various natural resins; highly polymerized sodium polyacrylate crosslinked material, activated carbon, and other various additives mentioned above are added and mixed; the mixing ratio of these three materials is For example, the adhesive is 5 to 50 parts and the additive is 5 to 50 parts to 100 parts of the solvent.
It is not limited to these and can be changed as appropriate.

The mixture of these three can be heated from 0°C to room temperature to, for example, 100°C.
Although it is possible to reduce the viscosity or increase the dissolution rate by heating to a high temperature such as .degree. C., it is preferable that the temperature is below the boiling point of the solvent.

Material A may be entirely immersed in the above-mentioned mixture in the tank 3, but from an economic point of view, it is preferable to set the position of the roll 2 so that the mixture adheres only to one side, for example, the aluminum surface. A heat drying roll 4 is preferably arranged above the roll 2.

The material A film coated with the mixture was heat-treated.

First remove the solvent. The roll 4 is heated at a temperature 1 at which it can be removed, for example from 150°C to 20°C, depending on the solvent used.
Warm to 0℃.

On the other hand, the water-permeable material C is rolled up from the roll 5 wound with the water-permeable material C made of non-woven fabric, and then the water-permeable material C is transferred to one or several pairs of heating rolls 6.6'.
Here, it comes into contact with material A coated with the mixture,
Then, the three parts are thermally bonded by pressure bonding and heat treatment. in this case,
The heating temperature of the roll 6.6' is changed depending on the type of adhesive used, but it is heated, for example, to about 80 to 150°C. Further, if necessary, heat welding, fusion bonding, heat sealing, etc. are also possible, and the three materials are bonded by the method most suitable for the materials used.

In this way, a packaging material consisting of layers A, B, and 0 is formed, which is passed through a cooling device and a drying device if necessary, and then wound onto a product winding reroll 7 to form a product. The product may be made into a long roll as described above, or may be cut into a suitable size, and if necessary, an additional wrapping material may be applied.

It is more advantageous to use a material on which characters, patterns, etc. can be printed as the exterior material, and it is even more convenient to make it waterproof.

Exterior materials include, for example, polyvinylidene chloride, hydrochloric acid rubber, polyethylene, cellulose acetate, polyvinyl chloride, cellophane, polyester, polycarbonate,
Plastic sheets such as polyamide, polypropylene, vinylon, polyvinyl alcohol, polyurethane, and polystyrene; porous films; soft corrugated cardboard; laminates thereof, and the like are used as appropriate.

A plurality of these rolls can be provided if necessary. ! ! The mixture may be directly applied to the film using a brush or the like instead of the I cloth roll 2, or it may be applied by spraying with a nozzle or the like. Reverse the positions of the A material roll and C material.

There is no problem in applying the additive mixture to material C.

In addition, by accommodating a large number of additives in the tank 3, or by preparing several tanks each accommodating each additive,
A large number or types of additives may be applied.

If necessary, increase the number of rolls A.

You can freely laminate the desired number of B and 0 layers, or repeat the above method to combine multiple package droplets as shown in Figure 1, allowing for various variations. Min can be achieved.

(Effects of the Invention) According to the present invention, a novel food packaging material comprising an aluminum vapor-deposited film layer, an additive layer, and a water-permeable material layer can be industrially produced very easily and quickly.

According to the present invention, the type and amount of additives to be used can be freely changed depending on the food to be packaged, and the additives can be freely used regardless of whether they are in liquid or solid form.
This method is particularly suitable as an industrial method because it can be used as is without the need to package the additives individually in sheet form.

In addition, it is not only possible to freely change the number and thickness of layers A, B, and 0, but also to laminate as many basic structural units of the packaging material as necessary, allowing flexibility to suit the needs of the food to be packaged. Therefore, according to the present invention, it is possible to produce packaging materials for all food products.

The packaging material obtained by the present invention is thus:

All foods can be maintained in their original state for a long time.For example, in the case of meat, seafood, and frozen foods, water and juice generated from these can be separated to prevent quality deterioration. It also prevents these from sticking to the packaging material, allowing it to maintain its freshness for an extremely long period of time.

Additionally, warm foods that generate large amounts of steam, such as bread, nikuman, manzu, and imayoyaki, have traditionally been difficult to preserve.

With this new packaging material, it has become possible to maintain temperature and humidity, flavor, texture, texture, etc. for a long period of time without impairing the food texture.

Conventionally, food products such as bread have suffered from a rapid drop in temperature over time, as well as evaporation of moisture, resulting in a dry texture and structure, deteriorating their commercial value. However, according to the present invention, from the producer's perspective, it is possible to produce a large amount of bread at once, resulting in a significant reduction in production costs, and from the consumer's perspective.

The advantage is that you can always get freshly baked bread without having to go to a new bread manufacturing store every time you buy freshly baked bread. Also.

Conventionally, when packaging bread, if the bread was not left to cool, the moisture from the bread would condense inside the plastic packaging film and lose its commercial value, so the bread-making process required a long cooling process. However, according to the present invention, packaging can be done immediately while still hot, so from this point of view,
There is also the advantage of speeding up the manufacturing process and reducing production costs.

As described above, the present invention exhibits outstanding effects.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of a packaging material manufactured according to the invention, and FIG. 2 illustrates an embodiment of an apparatus for carrying out the invention. Agent: Patent Attorney 1) Parent: Male Figure 1 Figure 2 Amendment to Procedures February 18, 1988

Claims (1)

[Claims] An organic solvent in which the adhesive and additives are dissolved and/or suspended is applied to one side of the aluminum vapor-deposited film or water-permeable material, and the water-permeable material or aluminum vapor-deposited film is brought into contact with this applied surface, respectively. gluing or fusing;
A method for producing a food packaging material characterized by: