JPH0737976U - Lid for food container - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a lid for a food container, which is excellent in practicality, without impairing the function of the hygroscopic sheet, eliminating the above-mentioned problems caused by the provision of the hygroscopic sheet. thing. [Structure] The hygroscopic sheet 3 is attached to one surface in layers,
The surface of the hygroscopic sheet 3 is covered with the breathable film 4 having a porous structure.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a lid for a food container, and more particularly to a lid for a food container that contains steam-producing food such as freshly cooked rice.

[0002]

[Prior art]

 At bento box stores and bento delivery shops, food containers that hold cooked rice are generally made of polystyrene resin foam or other molded products to keep heat. When freshly cooked cooked rice is placed in a food container and the lid is closed immediately to keep it warm, the steam generated by cooked rice touches the lid and condenses, causing water droplets on the inner surface of the lid. . If this drop of water drops on the cooked rice in the container, the flavor and taste of the cooked rice will be impaired.

In view of this, a hygroscopic sheet such as a non-woven fabric is attached to the inner surface of the lid in a layered manner, and steam is adsorbed and held by the hygroscopic sheet so that water droplets due to condensation do not drip onto the cooked rice. Has already been proposed (see Japanese Patent Application No. 4-6040 filed by the applicant).

[0004]

[Problems to be solved by the device]

 When a hygroscopic sheet such as a woven cloth is provided, the intended purpose is achieved.However, since the hygroscopic sheet is cotton-like and easily fluffed, it is exposed on the surface. The quality of the outer surface of the food container may deteriorate, and the fibers that make up the hygroscopic sheet may be mixed into the cooked rice.If the cooked rice adheres to the hygroscopic sheet, take the cooked rice from this. There is a problem that is difficult.

The present invention provides a lid for a food container, which is excellent in practicality, without the above-mentioned problems caused by the provision of the hygroscopic sheet, without impairing the function of the hygroscopic sheet. Has an aim.

[0006]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the lid for a food container according to the present invention has a hygroscopic sheet attached in layers on one surface, and the surface of the hygroscopic sheet is covered with a breathable film having a porous structure. It is characterized by that. A super absorbent resin may be mixed in the hygroscopic sheet, whereby the water supply capacity can be further enhanced.

[0007]

[Work]

 According to the above-mentioned configuration, since the surface of the hygroscopic sheet is covered with the breathable film, the hygroscopic sheet is not exposed on the surface, and the steam is more steamy than the food such as cooked rice stored in the food container. When it comes out, the steam passes through the breathable film and enters the hygroscopic sheet, or is adsorbed and held by the hygroscopic sheet. This prevents water droplets from dripping on the cooked rice in the container, and avoids spoiling the taste.

[0008]

【Example】

 Embodiments of the present invention will be described below in detail with reference to the drawings. 1 and 2 show an embodiment in which a food container including a lid for a food container according to the present invention is applied as a folded box container for cooked rice. The folded box-shaped container for cooked rice comprises a folded box-shaped container body 1 having an upper opening-shaped box body, and a plate-shaped lid body 2 which is detachably fitted and mounted in an upper opening of the folded box-shaped container body.

The folded box-shaped container body 1 is formed by coating the outer surface of a polystyrene foam molding with a polystyrene non-foaming film having a thickness of about 40 μm. The outer surface (outer surface) of the molded body of polystyrene foam is coated with a non-foamed film of polystyrene, and the hygroscopic sheet 3 is attached to the inner surface of the lid 2 in layers over the entire surface. There is. The hygroscopic sheet 3 is made of, for example, a non-woven fabric composite product made of special acrylic and polypropylene / polyethylene, and is attached to the inner surface of the lid body 2 by a hot melt method.

A breathable film 4 having a porous structure is laminated on the surface of the hygroscopic sheet 3, and the entire surface of the hygroscopic sheet 3 is covered with the breathable film 4. The breathable film 4 has a thickness of about 30 μm, and fine holes 5 having a diameter of about 100 to 400 μm are arranged in a matrix in the vertical and horizontal directions at a pitch of about 2 mm. In a preferred embodiment, this breathable film 4 is made of a resin similar to that of the hygroscopic sheet 3, for example, a polyethylene film, and is finely divided by laser processing while being laminated on the hygroscopic sheet 3. The holes 5 are perforated in a staggered arrangement with a pitch of about 2 mm, and are thermally bonded to the hygroscopic sheet 3 by this thermal perforation.

From the viewpoint of the air permeability to the hygroscopic sheet 3 and the non-returnability of moisture from the hygroscopic sheet 3, the fine pores 5 of the air permeable film 4 are breathable as shown in FIG. It has a trumpet shape in which the diameter decreases from the outer surface side of the film 4 toward the hygroscopic sheet 3, and the diameter is 400 μm on the large diameter side and 300 μm on the small diameter side.

According to the above-mentioned configuration, even if steaming food such as freshly cooked rice is put in the folding box container body 1 and the folding box container body 1 is immediately covered by the lid body 2, The steam from the food in the container body 1 passes through the fine holes 5 of the breathable film 4 and enters the hygroscopic sheet 3, or is absorbed and retained by the hygroscopic sheet 3 by the hygroscopic ability of the hygroscopic sheet 3. This prevents water droplets from being generated due to dew condensation, and prevents water droplets from adhering to the inner surface of the lid 2.

Since the inner surface of the lid body 2 is provided by the breathable film 4, deterioration of the texture of the outer surface as a food container due to the hygroscopic sheet 3 is avoided, and the fibers forming the hygroscopic sheet 4 are folded box-shaped. There is no risk of mixing with food such as cooked rice in the container body 1, and even if cooked rice adheres to the inner surface of the lid 2, that is, the breathable film 4, the breathable film 4 is made of a film material. Therefore, you can easily get cooked rice from this.

The lid for a food container according to the present invention is not limited to the lid of the folded box-shaped container for cooked rice as described above, but is applicable to food containers of other shapes, and as described above. The container is not limited to the outer cover. For example, as shown in FIG. 4, in the case of a container with an inner cover in which the inner cover 10 for putting a side dish or the like is fitted in the container body 11 in a fitting manner, the container shown in FIG. It may be applied to the inner lid 11 as described above.

Note that, in FIG. 5, portions corresponding to those in FIGS. 1 to 3 are indicated by the same reference numerals as those in FIGS. 1 to 3. Further, in FIG. 4, reference numeral 12 indicates an outer lid, and the outer lid 12 is attached to the container body 11 with the inner lid 10 interposed therebetween. In any of the examples, the material forming the food container is not limited to polystyrene-based foamed resin, which is composed of polypropylene resin foam, polyethylene terephthalate resin foam, or other resin foam. May be.

The hygroscopic sheet 3 may be composed of a non-woven fabric made of rayon, cotton, polyester or the like, a non-woven fabric containing a highly water-absorbent resin, a hygroscopic pulp structure, or the like. The breathable film 4 may be made of a film material other than a polyethylene film, and may be made of a porous film material having air permeability in addition to the breathable structure by perforation.

[0017]

[Effect of device]

 As can be understood from the above description, according to the lid for a food container according to the present invention, steam generated from food such as cooked rice stored in the food container passes through the breathable film to the hygroscopic sheet, Since it is adsorbed and held by the hygroscopic sheet, water droplets are prevented from adhering to the lid surface, and the hygroscopic sheet is covered with a breathable film so that the hygroscopic sheet is not exposed to the surface. The deterioration of the texture of the outer surface of the food container due to the sheet is avoided, there is no risk that the fibers that make up the hygroscopic sheet will be mixed with food such as cooked rice in the folded box-shaped container body, and the inner surface of the lid Even if the cooked rice adheres to, the cooked rice can be easily taken.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment in which a food container including a lid for a food container according to the present invention is applied as a folded box-shaped container for cooked rice.

FIG. 2 is a perspective view showing an embodiment in which a lid for a food container according to the present invention is applied as a lid for a box-shaped container for cooked rice.

FIG. 3 is a partially enlarged sectional view of a lid for a food container according to the present invention.

FIG. 4 is a perspective view showing a configuration example of a container with an inner lid.

FIG. 5 is a sectional view showing an embodiment in which the lid for a food container according to the present invention is applied as an inner lid of a container with an inner lid.

[Explanation of symbols]

 1 Folded box-shaped container body 2 Lid body 3 Hygroscopic sheet 4 Breathable film 5 Micropores 10 Inner lid 11 Container body 12 Outer lid

Claims (2)

[Scope of utility model registration request] 1. A lid for a food container, wherein a hygroscopic sheet is attached to one surface in a layered manner, and the surface of the hygroscopic sheet is covered with a breathable film having a porous structure. 2. The lid for a food container according to claim 1, wherein the hygroscopic sheet contains a highly water-absorbent resin.