JP3036948U - Microwave oven heated food tray - Google Patents

Abstract

(57) Abstract: A tray for food heated in a microwave oven is provided with breathability when heated in a microwave oven, air inside the tray is appropriately released, and hygiene is also excellent. SOLUTION: A tray 2 is covered with a lid 2 in which a breathable nonwoven fabric 3 treated with chitin and / or chitosan or paper is attached to the entire lower surface of a non-breathable film 4 or a required portion of the lower surface. The air-permeable slit C is formed by peeling off the non-breathable film 4 on the upper surface of the non-woven fabric 3 or paper by a required area.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a tray for microwave oven-heated food, which is used, for example, for warming in a microwave oven at home by putting in a take-away gourd, Shumai, etc., which has excellent antibacterial properties.

[0002]

[Problems to be solved by the device]

 In the past, when warming gouga or Shumai in a tray with a household electronic range, for example, the upper part of the tray may be wrapped with saran resin film.In this case, the film has gas barrier properties. Therefore, there was an inconvenience that the expanded air and steam generated from the dumplings could not escape when the microwave oven was heated. Also, conventionally, this kind of tray had no antibacterial property, so that there was a problem in hygiene.

The present invention has been made in view of the above circumstances, and its purpose is to obtain ventilation when heating in a microwave oven, and to appropriately release the air inside the tray. Another object is to provide a food tray excellent in hygiene.

[0004]

[Means for Solving the Problems]

 In the tray for microwave oven-heated food according to the present invention as set forth in claim 1, a non-woven fabric or paper treated with chitin and / or chitosan is provided on the entire lower surface of the non-breathable film or a required portion of the lower surface. The attached lid is attached to the tray body, and the ventilation slit is formed by peeling off the non-breathable film on the upper surface of the non-woven fabric or paper by the required area. .

In the tray for microwave oven-heated food according to the present invention as set forth in claim 2, a porous film having a large number of small holes for ventilation is attached to the entire lower surface of the non-permeable film or a required portion of the lower surface, The bottom surface of the porous film is covered with a breathable non-woven fabric or paper treated with chitin and / or chitosan on the tray body. The ventilation slits are formed by stripping only the area.

Examples of the breathable non-woven fabric include a polyolefin-based non-woven fabric obtained by a flash spinning method. This non-woven fabric has not only breathability but also appropriate moisture permeability.

Breathable paper is meant to include both regular and synthetic paper made from plant fibers. The paper is preferably treated so that it can be heat-sealed.

Chitin is a kind of polysaccharide having a chemical structure similar to that of cellulose, and is made up of tens of thousands of low-molecular weight compounds “N-acetylglucosamine” linked to each other. The shells of crustaceans such as crabs and the outer skin of insects , Is a major constituent of the fungal cell wall.

Chitosan is one in which a large number of glucosamines obtained by removing an acetyl group from the N-acetylamino group of chitin are linked.

As chitin and chitosan, commercially available products can be used.

The treatment with chitin and / or chitosan means, specifically, after immersing the above-mentioned nonwoven fabric or paper in an aqueous solution of chitin and / or chitosan, squeezing an excess portion of the aqueous solution to dry it. It means that the aqueous solution is applied to the inside (food side) of the tray of the non-woven fabric or paper and then dried.

[0012] The above-mentioned chitin and chitosan have antibacterial properties, etc., but in the case of further enhancing antibacterial properties and antifungal properties, as antibacterial agents, those for which standards and standards are shown in the official compenditure of food additives. You may use together. Such examples include isothiocyanic acid esters such as allyl isothiocyanate and -sec-butyl isothiocyanate, sodium benzoate, isobutyl p-oxybenzoate, butyl p-oxybenzoate, isopropyl p-oxybenzoate, Examples include propyl p-oxybenzoate, ethyl p-oxybenzoate, sorbic acid, potassium sorbate, dehydroacetic acid, sodium dehydroacetate, calcium propionate, sodium propionate, etc., and especially for citrus fruits. Examples include diphenyl, o-phenylphenol, sodium o-phenylphenol, thiabendazole, and imazalil.

Examples of the non-breathable film include a nylon film, a polyethylene film, a polystyrene film, a polyethylene terephthalate film (PET), and a polypropylene film.

As a means for stripping the non-breathable film on the upper surface of the non-woven fabric or paper, two perforations having a length slightly shorter than the length of the non-woven fabric or the like should be provided at intervals slightly narrower than the width of the non-woven fabric or the like. Form them so that they are parallel to each other and one end of both perforations reaches the edge of the lid, and at the same time form perforations that connect the other ends of both perforations and are surrounded by these perforations. The non-breathable film on the top side of the non-woven fabric or paper by peeling off the non-breathable film on the top of the non-woven fabric or paper by pulling it along the perforations along the perforations. The tape is attached to the upper surface of the flexible film, and the tape for peeling is pulled to peel off the non-air-permeable film at the portion to which the tape is attached. In addition, in order to more easily peel off the non-breathable film described above, in the former case, the edge of the non-breathable film on the lid edge side of the part surrounded by the perforations is extended to form a knob, and in the latter case, it is for peeling. It is preferable to extend one end of the tape without sticking it to the non-breathable film to form a tab.

The tray body may be made of any material that can withstand the temperature (about 115 ° C.) when heated in a microwave oven, and one made of synthetic resin such as polystyrene or polypropylene is light and cost effective. It is advantageous.

When changing the air permeability and moisture permeability of the tray according to the contents, the area for stripping the non-air permeable film may be widened or narrowed.

[0017]

[Embodiment of the invention]

 Next, an embodiment in which the present invention is applied to a tray for take-away gourza will be described with reference to the drawings.

[Embodiment 1] In FIGS. 1 to 4, (1) is a substantially rectangular tray main body made of polypropylene and having a size capable of accommodating a predetermined number of gourds (A). (2) is a lid formed by heat-sealing a band-shaped non-woven fabric made of polyethylene (3) treated with chitosan on the required part of the lower surface of a non-breathable nylon film (4). On the non-breathable film (4) on the upper surface of the non-woven fabric (3), perforations (5) are formed in a U shape along the outer circumference of the non-woven fabric (3) slightly inside. Further, a knob portion (4b) is provided in an extended shape at the end portion of the non-breathable film (4a) surrounded by the perforations (5) on the lid edge side. In the figure, (5a) is a peeling groove formed on the end face of the non-breathable film (4) following the end portions of both perforations (5) on the lid edge side. Further, by making the depth of the perforations (5) about half the thickness of the non-breathable film (4), the hermeticity inside the tray is secured.

Then, the portion of the non-breathable film (4a) surrounded by the perforations (5) is grasped at the knob portion (4b) and pulled in the direction of the arrow (B) along the perforations (5). Thus, the non-air permeable film (4a) is peeled off, and the ventilation slit (C) is formed.

The breathable non-woven fabric (3) is, specifically, formed by forming a chitosan coating film (3a) by applying a chitosan aqueous solution on the lower surface and drying.

The lower surface of the peripheral portion of the lid (2) is heat-sealed to the outer surface of the peripheral portion of the tray body (1), and the internal pressure of the tray increases when heating the gyoza (A) in a microwave oven. Also, the lid (2) is designed not to come off from the tray body (1).

When heating the gyoza (A) placed in the tray having the above structure in the microwave oven, the non-breathable film (4a) is moved along the perforation (5) in the direction of the arrow (B). By pulling, the non-breathable film (4a) is peeled off from the breathable nonwoven fabric (3) to form a predetermined slit (C) for ventilation. Then, when this tray is placed in a microwave oven and heated, the expanded air in the tray and the vapor generated from the cheeks pass through the breathable nonwoven fabric (3) in the ventilation slit (C) to the outside of the tray properly. Will be released. [Embodiment 2] This embodiment is shown in FIGS. 5 to 7, and only the lid 22 is substantially different from that of the first embodiment. Therefore, the components other than the lid (22) are designated by the same reference numerals as those in the first embodiment, and the description thereof will be omitted.

In the present embodiment, the lid (22) is made of polyethylene, which is a non-breathable film (24) made of nylon, and is made of a polyethylene breathable film obtained by treating the entire lower surface with a chitosan aqueous solution mixed with sodium benzoate. A synthetic paper (23) is heat-sealed, and a peeling tape (25) having a predetermined length and width is attached to the upper surface of the non-breathable film (24). In addition, at the end of the peeling tape (25), a knob (25a) that is not attached to the non-breathable film (24) is formed.

Then, by grasping the knob portion (25a) and pulling the peeling tape (25) in the direction of the arrow (B), the non-breathable film (24a) in the portion where the tape (25) is adhered is ventilated. It is peeled off from the synthetic paper (23) to form the ventilation slit (C). Only the breathable synthetic paper (23) remains in this ventilation slit (C).

Specifically, the breathable synthetic paper (23) is obtained by impregnating the above chitosan aqueous solution and then squeezing out the excess of the aqueous solution and drying.

[Embodiment 3] This embodiment is shown in FIG. 8, and only the lid 32 is different from the above embodiments. The lid (32) of the present embodiment is a porous PET film (PET) having a large number of small ventilation holes (36) on the upper surface of a breathable nonwoven fabric (33) made of polypropylene whose lower surface is coated with chitosan (33a). 37) is adhered, and a non-breathable polyethylene film (34) is adhered to the upper surface of the porous film (37). Then, similar to the first embodiment, the air-impermeable film (34) is peeled off through the perforations to form the air-permeable slit (C).

In addition to the embodiments described above, in the present invention, a breathable paper may be used instead of the breathable nonwoven fabric or the synthetic paper. In this case, the paper may be heat-sealed to the non-breathable film, or may be adhered using an adhesive.

[0028]

[Effect of the invention]

 According to the tray for a microwave oven-heated food of the present invention, the airtight film layer in the lid attached to the tray body ensures the airtightness of the inside of the tray when carrying out the take-away etc. Upon heating, a predetermined ventilation slit is formed by peeling off the non-breathable film in a required area, and the ventilation and appropriate moisture permeability of the tray can be obtained through the slit. Therefore, it is possible to easily warm up gyoza and Shumai etc. to take home and eat deliciously. Further, the tray of the present invention is excellent in hygiene because the breathable non-woven fabric or paper is treated with antibacterial chitin and / or chitosan. In addition, the use of chitin or chitosan, which is a natural resource that has been almost unused before, as a packaging material enables effective use of the resource and can reduce the material cost.

[Brief description of the drawings]

FIG. 1 is a perspective view of a tray showing an embodiment of the present invention.

FIG. 2 is a perspective view of relevant parts showing a state in which a non-breathable film is stripped off from the tray of FIG.

FIG. 3 is a vertical sectional view of a lid in the same embodiment.

FIG. 4 is a vertical cross-sectional view showing a stripped state of a non-breathable film in the same embodiment.

FIG. 5 is a perspective view of a tray showing another embodiment of the present invention.

FIG. 6 is a vertical sectional view of a lid in the same embodiment.

FIG. 7 is a vertical cross-sectional view showing a stripped state of the non-breathable film in the same embodiment.

FIG. 8 is a vertical sectional view of a lid according to still another embodiment of the present invention.

[Explanation of symbols]

 (1): Tray body (2) (22) (32): Lid (3) (33): Breathable nonwoven fabric (4) (24) (34): Non-breathable film (23): Breathable synthetic paper ( C): Vent slit (36): Vent small hole (37): Porous film

Claims (2)

[Utility model registration claims] 1. A tray main body is covered with a lid formed by attaching a breathable nonwoven fabric or paper treated with chitin and / or chitosan to the entire lower surface of the non-breathable film or a required portion of the lower surface. A tray for microwave oven-heated foods, in which a ventilation slit is formed by peeling off a non-breathable film on the upper surface of a non-woven fabric or paper in a required area. 2. A non-breathable film, wherein a porous film having a large number of small holes for ventilation is adhered to the entire lower surface or a required portion of the lower surface, and the lower surface of the porous film is treated with chitin and / or chitosan. A non-woven fabric or paper with adhesive properties is attached to the tray body,
A tray for microwave oven-heated food, wherein a ventilation slit is formed by peeling off the non-breathable film on the upper surface of the porous film by a required area.