JPH0522312U - Food containers - Google Patents

Abstract

(57) [Summary] [Structure] A perforated film made of a thermoplastic resin, in which a large number of capillary projections (2) are formed on the surface and through-holes (3) of minute diameter are provided at the tips of the capillary projections. (1) to the bottom of the container and /
Or a food container provided on the lid. [Effect] In particular, in a container provided with a perforated film provided on the bottom, between the bottom of the container and the food contained therein, it is possible to sufficiently perform ventilation and moisture elimination without being blocked by the food. The space is formed, and as a result, the quality of food can be improved or the efficiency of cooking can be improved.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a food container, and more particularly to a food container capable of improving the quality of food and improving cooking efficiency.

[0002]

[Prior Art]

 Conventionally, plastic folding boxes and trays have been widely used as food containers. Folding boxes usually have a container body with an integral or independent lid, and trays consist of relatively shallow containers, such as those with lids or those packaged with packaging film. is there. In addition, some of these types have bottom holes, and various types of containers are used according to the purpose of use.

[0003]

[Problems to be solved by the device]

 By the way, when a food is stored in a container having no bottom hole, the water in the food is not absorbed at all, so that the food at the bottom easily gets damp. Also, in the case of a container having a bottom hole, the bottom hole is clogged with food and the air permeability is impaired, so that the container is likely to be stuffy as described above. In particular, a container having a bottom hole is considered to be effectively used for freezing, thawing, heating and steaming back frozen food, but as a result of the bottom hole being blocked by food, The effect of can not be fully exerted. Furthermore, in a container provided with a lid, there is a disadvantage that the contained food adheres to the front surface of the lid. The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a food container that is sufficiently ventilated and has moisture removed, and that can improve food quality and improve cooking efficiency. It is a thing.

[0004]

[Means for Solving the Problems]

 That is, the gist of the present invention is to provide a thermoplastic resin perforated film having a large number of capillary projections formed on the surface thereof and a microscopic through hole at the tip of the capillary projections, and the bottom and / or lid of a container. A food container characterized by being provided in.

[0005]

[Action]

 The perforated film provided on the bottom of the container forms a space between the bottom of the container and the contained food, which is not blocked by the food and can sufficiently ventilate and remove water. Further, the perforated film provided on the lid of the container prevents the contained food from adhering to the entire surface on the lid side.

[0006]

【Example】

 Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. First, the perforated film having a specific structure used in the present invention will be described. In the present specification, the term “film” is used as a concept including a sheet. FIG. 1 is an enlarged sectional explanatory view of an example of a perforated film used in the food container of the present invention, and FIG. 2 is an enlarged sectional explanatory view of another example.

The perforated film (1) used in the food container of the present invention has a large number of capillary projections (2) formed on the surface thereof, and the capillary projections have fine through holes ( 3) is installed.

The perforated film (1) is made of a film of low density polyethylene, high density polyethylene, polypropylene, nylon, ethylene vinyl acetate copolymer, low pressure low density polyethylene, or other thermoplastic resin. The perforated film (1) may be transparent or translucent, or may be colored.

A large number of capillary projections (2) are formed on the entire surface of the perforated film (1). The capillary projections (2) are usually sufficient if they are formed on only one side of the perforated film (1). As shown in FIG. 1, the capillary projection (2) corresponds to a frustum shape having an average angle (taper angle) α of the inclined surface of the projection with respect to the perforated film (1) surface of about 10 to 60 °. As shown in Fig. 2, the base end rises almost vertically and the tip end is recessed, or, although not shown, the peripheral surface of the protrusion Forms a curved surface and has a tapered shape or the like. The frustum shape may be a truncated cone shape, a truncated pyramid shape, or any other frustum shape. The height (h) of the capillary protrusions (2) is usually in the range of 10 to 1000 μ.

A through hole (3) is formed at the tip of the capillary projection (2), and the through hole has a dimension (diameter) of the proximal side opening (3a) of about 0.1 to 2 mm. The size (diameter) of the tip side opening (3b) is about 0.05 to 1 mm, and the tip end is a microscopic capillary through hole rather than the base end. The through-holes (3) are formed with a density of about 8 to 100 mesh, depending on the thickness of the perforated film (1).

Although not shown, the perforated film (1) having the specific structure as described above is, for example, a cylindrical forming plate having a recess having a predetermined shape and a small hole opened at a lower portion of the recess. Corresponding to the above-mentioned depression by fitting it on a drum and continuously contacting a high-temperature thermoplastic resin sheet on the molding plate, and at the same time vacuum suction from the rotating drum side (you may press from the outside at the same time) It can be manufactured by a method in which a protrusion is formed and the tip of the protrusion is broken by a small hole at the bottom of the recess to form an opening. At this time, a part of the depression in the circumferential direction of the molding plate or the direction of the rotation axis is closed by a blocking plate or a pressure reducing plate to make it partially unprotruded, or in the same way, a small hole at the bottom of the depression is closed. Non-porous protrusions can be formed.

Next, the food container of the present invention will be described. The food container of the present invention comprises the perforated film (1) having the specific structure described above provided on the bottom and / or the lid of the container. 3 to 5 are enlarged cross-sectional explanatory views of an essential part of an example of the food container of the present invention, FIG. 3 is an example of a folding box having no bottom hole, and FIG. 4 is an example of a folding box having a bottom hole. 5 shows an example of a tray having a bottom hole.

The perforated film (1) is usually attached to the existing container (4) on the bottom and / or the lid by using an appropriate adhesive, but the perforated film (1) is attached to the bottom of the container (4). It suffices to place only a certain size. In this case, the perforated film (1) may be used so that the capillary projection (2) side is located on the back side or the front side, but the capillary projection (2) side is located on the back side. It is effective to use it so that it is positioned. In the case of a container having a bottom hole (5), as shown in FIGS. 4 and 5, the through hole (3) at the tip of the capillary projection (2) is provided so as to face the bottom hole (5). Is preferred.

In the food container of the present invention, in particular, the one having the perforated film (1) provided on the bottom of the container (4) having the bottom hole (5) includes the bottom of the container (4) and the contained food. The space (6) that is not blocked by food and that can sufficiently ventilate and remove water is effectively used for freezing, thawing, heating and re-steaming frozen food. You can

In the food container of the present invention, the perforated film (1) (not shown) provided on the inner surface of the lid suppresses the adhesion of food. In particular, the one used so that the capillary protrusion (2) side is positioned on the front side effectively prevents the adhesion of food.

[0016]

[Effect of the device]

 According to the present invention described above, by providing a perforated film having a through-hole of a specific structure on the bottom and / or the lid of a container, it is possible to improve the quality of food and improve the efficiency of cooking and the like. The container of the present invention is particularly suitable as a container for frozen foods.

[Brief description of drawings]

FIG. 1 is an enlarged cross-sectional explanatory view of an example of a perforated film used in the food container of the present invention.

FIG. 2 is an enlarged cross-sectional explanatory view of another example of the perforated film used in the food container of the present invention.

FIG. 3 is an enlarged cross-sectional explanatory view of an essential part of an example of a food container of the present invention, showing an example of a folding box having no bottom hole.

FIG. 4 is an enlarged cross-sectional explanatory view of an essential part of an example of the food container of the present invention, showing an example of a folding box having a bottom hole.

FIG. 5 is an enlarged cross-sectional explanatory view of an essential part of an example of the food container of the present invention, showing an example of a tray having a bottom hole.

[Explanation of symbols]

 (1): Perforated film (2): Capillary protrusion (3): Through hole (4): Container (5): Bottom hole

Claims (1)

[Scope of utility model registration request] 1. A thermoplastic resin perforated film having a large number of capillary projections formed on the surface thereof and having through-holes of minute diameters provided at the tips of the capillary projections on the bottom and / or lid of a container. A food container characterized by being provided.