JP2532903B2 - Packaging sheet - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a packaging sheet used for storage or transportation of foods and the like.

(Prior art and its problems) When storing or transporting foods, etc.,
There is a problem of frozen storage as a means of long-term heat retention. However, frozen storage has the problem that the cells of the food are destroyed during freezing and thawing, and the quality deteriorates due to dripping and the like. When storing or transporting using ice, there is a problem that the distribution of cold air with respect to food etc. becomes non-uniform and the food etc. partially deteriorates, etc. Also, using a liquid cold storage agent etc. When stored or transported by the above method, the liquid regenerator is locally concentrated, the temperature distribution becomes insufficient, and the regenerator presses the food or the like to deform the food.

(Means for Solving Problems) The present invention has been devised in view of the above conventional problems, and an object of the present invention is not to provide a packaging sheet that can easily control water content and maintain freshness of foods and the like. age,
The gist is that an ionomer resin film is applied to the inside of a water-proof plastic waterproof sheet in which uneven portions are continuously formed, and the ionomer resin film is heat-welded to vent the surface of the waterproof sheet. By adhering a conductive sheet, a large number of enclosed chambers are formed at intervals by the recesses, and in each enclosed chamber, deorite containing ceramic particles capable of emitting far infrared rays and copper ions is mixed. That is, the block-shaped water-absorbent resin mixed together is enclosed.

(Function) By wrapping a food or the like, the effects such as dehydration, water retention, and cold insulation on the food or the like can be satisfactorily exhibited, and the food or the like can be easily used for transportation. Further, since the ionomer resin film is adhered, it becomes easy to heat-bond the breathable sheet, and the sheet property of the welded portion is improved. In addition, since the waterproof sheet is formed in a concavo-convex shape, it is possible to stack the packaging sheets satisfactorily, and it is possible to exhibit a good use state without sticking when precooling in the freezer. Also, since the uneven shape of this waterproof sheet has a cushioning property, a cushioning effect against the impact of food etc. can be expected, and a better cushioning effect is expected especially when it is used by being attached to the inner wall surface of a cardboard. it can. Further, it is possible to stack the packaging sheets and the foods and the like alternately through the uneven portions and transport them in a good cold state.

It should be noted that the ceramic particles and the like emit far-infrared rays to the outside, and the co-vibration effect of the far-infrared rays can be exerted on the cells of foods and the like to activate the cells, and better maintain freshness during transportation. It is possible to increase the flavor of foods and the like at the same time. In addition, ozone ionized active air is generated by copper ions, ozone is covered around foods, etc., and bacteria etc. adhering to foods are killed by the sterilizing power of ozone, and the bactericidal effect and deodorizing effect during transportation are good. Can be demonstrated.

(Embodiment) An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows a partial plan view of the packaging sheet of this example, FIG. 2 is a sectional side view thereof, and FIG.

The packaging sheet 1 of this example is a breathable sheet 1a and a waterproof sheet.
The breathable sheet 1a can be formed by using a fibrous sheet of paper, non-woven fabric, woven fabric or the like, and is also formed on the one side waterproof sheet 1b. Is composed of a water-impermeable plastic sheet such as polyethylene, polypropylene, or polyvinyl chloride.

In this example, the waterproof sheet 1b is formed by alternately forming uneven portions and is continuously formed.
When the breathable sheet 1a is attached to the surface of 1b, the enclosed chambers S, S, S ... Are formed at appropriate intervals inside the sheet.

Further, in the present example, one block-shaped water absorbent resin 2 is enclosed in each of the enclosure chambers S, S, S ... Therefore, before the air-permeable sheet 1a is attached to the waterproof sheet 1b, the block-shaped water-absorbent resin 2 is put into each enclosed chamber S, S, S ..., and then the air-permeable sheet 1a is attached. Being manufactured.

When the breathable sheet 1a is attached to the waterproof sheet 1b, an ionomer resin film 1c is attached to the inside of the waterproof sheet 1b in this example in order to strengthen the attaching property. Therefore, the breathable sheet 1a can be easily heat-welded, and the sheet property of the welded portion is improved.

The block-shaped water-absorbent resin 2 enclosed in each enclosure S, S, S ... is, for example, a hydrolyzate of starch-acrylonitrile graft polymer, a hydrolyzate of cellulose-acrylonitrile graft polymer, or the like. Copolymers of monomers and cross-linking agents, such as cross-linked polyacrylamide and hydrolysates thereof, cross-linked sulfonated polyethylene, cross-linked poplar, and cross-linked as described in JP-A-52-14689 and JP-A-52-27455. Vinyl ester-unsaturated carboxylic acid copolymer saponified product, crosslinked polyacrylate and acrylic acid-
Examples thereof include acrylic acid ester copolymers, crosslinked isobutylene-maleic anhydride copolymers, and crosslinked polyethylene oxides. Furthermore, a polymer having a self-crosslinking property, for example, a self-crosslinking polyacrylic acid, Japanese Patent Publication No. 54-3071.
No. 0 resin or high molecular polymer containing at least a hydroxyl group and a carboxylate group in the molecule, for example, Japanese Patent Publication No.
The resin described in -37994 may be used. A water-absorbing resin obtained by polymerizing starch or cellulose with a water-soluble monomer and / or a monomer that becomes water-soluble by hydrolysis and a cross-linking agent as essential components and performing hydrolysis if necessary. May be.

The above water-absorbent resin may be used alone or in combination of two or more, and has a water-absorbing performance of 20 to 2000 g / g.
The degree is preferred.

The packaging sheet 1 thus configured can be used to wrap foods or the like. For example, by wrapping a fish in the packaging sheet 1, the water in the body of the fish absorbs the water absorbent resin 2 of the packaging sheet 1 during storage. As a result, fish drip and the like are effectively absorbed and the shelf life is increased. Therefore, the fish that has been lifted up in the river or the sea can be wrapped with this packaging sheet 1 and taken home to the house in a good preservation state.

In addition, it is possible to wrap a food product having a high water content with this packaging sheet 1 and carry it while removing water.

Further, a proper amount of water is permeated into the packaging sheet 1 to impregnate the water absorbent resin 2 with a considerable amount of water, and in this state, the packaging sheet 1 is precooled in a freezer in advance, and the precooled packaging sheet 1 When the food, the drug, etc. are wrapped in, the water absorbent resin 2 emits cold air to the food, the drug, etc. during transportation, and the food, etc. can be transported in a good cold state.

If the packaging sheet 1 is dipped in water and a large amount of water is impregnated in the water-absorbent resin 2, the water will be released from the water-absorbent resin 2 during transportation during wrapping of vegetables, etc. Is well replenished.

Further, the packaging sheet 1 of this example can be used, for example, by sticking it to the inner surface of a corrugated cardboard, and can be used for transportation by storing foods etc. in the corrugated cardboard. Is possible.

In addition, in this example, since the waterproof sheet 1b of the packaging sheet 1 is formed in a concavo-convex shape, it is possible to stack the packaging sheets 1 satisfactorily, and stick together when precooling in the freezer. The waterproof sheet 1b can be used in good condition without any damage, and since the uneven shape of the waterproof sheet 1b has a cushioning property, it is possible to enhance the cushioning effect against the impact of foods, etc. A better buffering effect can be expected when it is used by being adhered to.

Further, the packaging sheet 1 and the food or the like can be alternately stacked through the uneven portion and transported in a good cold state.

Since the water absorbent resin 2 in this example is formed in a block shape, when the packaging sheet 1 is formed, it can be easily put into each enclosure chamber S to mold the packaging sheet 1.

Incidentally, it is also possible to separately enclose a ceramic or the like capable of emitting far-infrared particles in the enclosure chamber S,
Further, deolite mixed with copper ions may be mixed in advance, and the ceramic and deolite may be mixed together with the water absorbent resin 2 to form an integral block.

That is, when ceramic particles or the like capable of emitting far infrared rays are enclosed in the enclosure S, the far infrared rays are emitted to the outside to exert a co-vibration effect by the far infrared rays on cells such as foods to activate the cells. In addition, the freshness of the food can be better maintained during transportation, and the flavor of food and the like can be increased.

Further, when deolite mixed with copper ions is enclosed in the enclosure chamber S, ozone-activated air is generated by the copper ions, the ozone covers the periphery of foods, etc. It can be killed by the bactericidal power, and the bactericidal effect and the deodorizing effect during transportation can be exhibited well.

(Effect of the invention) The packaging sheet of the present invention is an ionomer resin film adhered to the inside of a water-proof plastic waterproof sheet in which uneven portions are continuously formed and is heat-welded to the ionomer resin film. By attaching a breathable sheet to the surface of the waterproof sheet, a large number of enclosed chambers are formed at intervals by the recesses, and each of the enclosed chambers is capable of emitting far infrared rays. By enclosing a block-shaped water-absorbent resin in which deolite mixed with copper and copper ions is encapsulated, the food is wrapped and the effects of dehydration, water retention, cold retention, etc. on the food are excellently exhibited. Therefore, it can be easily used for transportation of foods and the like. Further, since the ionomer resin film is adhered, it becomes easy to heat-bond the breathable sheet, and the sheet property of the welded portion is improved. or,
Since the waterproof sheet is formed in a concavo-convex shape, it is possible to stack the packaging sheets well, and it is possible to present a good use state without sticking when precooling in the freezer, or Since the uneven shape of the waterproof sheet has a cushioning property, it can be expected to have a cushioning effect against the impact of food or the like, and particularly when used by being attached to the inner wall surface of a cardboard, a better cushioning effect can be expected.
Further, it is possible to stack the packaging sheets and the foods and the like alternately through the uneven portions and transport them in a good cold state. It should be noted that the ceramic particles and the like emit far-infrared rays to the outside, and the co-vibration effect of the far-infrared rays can be exerted on the cells of foods and the like to activate the cells, and better maintain freshness during transportation. It is possible to increase the flavor of foods and the like at the same time. In addition, copper ion generates ozone-like active air, which covers the surroundings of foods, etc., and kills bacteria attached to foods etc. by the sterilizing power of ozone, and has a good sterilizing effect and deodorizing effect during transportation. It has an effect that can be exhibited.

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention, FIG. 1 is a partial plan view of the packaging sheet of this example, FIG. 2 is a sectional side view of FIG. 1, and FIG. 3 is an enlarged view of an essential part of FIG. is there. 1 …… Packaging sheet, 1a …… Breathable sheet 1b …… Waterproof sheet 1c …… Ionomer resin film 2 …… Water absorbing resin S …… Enclosure room

Claims (1)

(57) [Claims] 1. An ionomer resin film 1c is adhered to the inside of a water-proof plastic waterproof sheet 1b in which concavo-convex portions are alternately formed continuously, and the ionomer resin film 1c is heat-welded to the waterproof sheet. By attaching the breathable sheet 1a to the surface of 1b, a large number of enclosed chambers S spaced by the recesses are formed.
A packaging sheet, characterized in that a block-shaped water absorbent resin 2 in which ceramic particles capable of emitting far infrared rays and deolite mixed with copper ions are integrally mixed is enclosed.