JPH04102208U - food and drink containers - Google Patents

Abstract

(57) [Summary] [Purpose] In food and beverage containers that are sterilized in a retort and heated in a microwave oven, by adding thickness to the side wall, the increase in processing time during retort sterilization can be minimized, and Provides heat insulation properties that can be held in the hand after cooking. [Structure] The container 1 is formed mainly from a foam of heat-resistant resin such as polyester resin. A convex portion 3 is formed in a required range of the outer peripheral surface of the side wall portion 2 of this container, and the wall thickness of the side wall portion 2 is made thicker or thinner, and the thick portion 2a formed by the convex portion 3 provides heat insulation properties that can be held by hand after cooking. The other thin portion 2b has a lower heat insulating property than the thick portion 2a.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This invention mainly applies to retort food, especially food and drink that is heated and eaten in a microwave oven. It relates to containers for goods.

0002

[Conventional technology and issues to be solved]

Food storage used for retort food, etc., which is cooked and eaten in a microwave oven. Due to its use as a storage container, it should not be used at high temperatures during retort sterilization or microwave cooking. It has heat resistance that can withstand high temperatures, and it can be held in hand immediately after cooking. It is required to have heat insulation properties.

0003 However, foamed polyester, which has traditionally been widely used for packaging instant foods and other foods, Containers made of tyrene resin, foamed polypropylene resin, etc. may have insulation properties. The heat resistance is insufficient, and it is heated to about 120℃ or higher. It is not suitable for sterilization by heating or heating in a microwave oven.

0004 Therefore, it is possible to use a foam made of a so-called heat-resistant resin, which has superior heat resistance compared to the above-mentioned resins. It can be considered to be used as a material for utensils. For example, polyethylene terephthalate, etc. Containers made of ester resin foam can be used for cooking in microwave ovens and It has the heat resistance to withstand the high temperatures during sterilization, and can be heated by hand after being heated in the microwave. It can also have good insulation properties.

[0005] However, the good insulation properties of insulating foam containers make them difficult to use for retort sterilization. This will be a big negative factor. In other words, retort sterilization can be used to, for example, Store foods and drinks such as stew in a sealed container and heat to around 120℃. It sterilizes by holding it for a certain period of time, but it is made of insulating foam. In the case of containers, their insulating properties prevent external heat from being transferred to the food and drinks stored inside. heating efficiency is lower than in the case of containers made of non-foamed sheets, and the The process time for root sterilization will be longer. Therefore, conventionally, insulation Some foam containers have been used for food and beverage containers that are sterilized by retort. I haven't.

[0006] The present invention was created in view of the above, and uses heat-resistant resin foam as the main material. Containers with heat resistance and heat insulation properties, especially those with thicker or thinner wall thickness on the side walls. This makes it possible to minimize the increase in processing time during retort sterilization. Foods and beverages with an insulated structure that are safe to hold in the hand after being heated in a microwave oven This provides a container for use.

[0007]

[Means to solve the problem]

The food and drink container of the present invention, which solves the above problems, is mainly made of heat-resistant resin foam. The container has a convex portion formed in a required range on the outer circumferential surface of the side wall of the container. The thickness of the wall is made thicker and thinner, and the thicker parts have heat insulation properties that can be held by hand due to the convex parts. This feature is characterized in that it allows the user to

[0008]

[Effect]

According to the food and drink containers mentioned above, the material is mainly made of heat-resistant resin foam. Because the material has excellent heat resistance, it cannot be heated during retort sterilization or in the microwave. It can withstand high temperatures during cooking, and since it is a foam, it has adequate insulation properties. It turns out.

[0009] In particular, the protrusion formed on the outer circumferential surface of the side wall of the container reduces the thickness of the side wall. Because of this, the thick part due to the convex part will be cut so that it can be held by hand after heating. Even if it has thermal properties, other parts of the thin wall have poor insulation properties. Therefore Leto During root sterilization, external heat passes through the thin walled area outside the convex part, that is, the area with poor insulation. It is relatively easily transmitted to the food and drinks inside. Therefore, the entire side wall section is the same as the thick section. The time required for retort sterilization is shorter than when using a thicker material. Compared to the case of containers made of non-foamed sheets, the time required does not increase by much.

0010 Moreover, after cooking in a microwave oven, the thick part due to the convex part on the outer periphery of the side wall By gripping the outer periphery, sufficient insulation can be maintained and the grip can be easily gripped without feeling hot. This means that it can be handled with ease.

[0011]

【Example】

Next, embodiments of the present invention will be described based on the drawings.

0012 In the examples shown in Figures 1 to 3, (1) is made of heat-resistant resin such as polyester resin. This is a container mainly made of foam. The outside of the side wall (2) of this container (1) Vertical square rib-like protrusions (3) are formed on the circumferential surface in the required range at required intervals in the circumferential direction. As a result, the side wall portion (2) is thick and thin. (2a) is The thick portion formed by the convex portion (3) and (2b) show the other thin portion.

[0013] Then, in the thick portion (2a) due to the above-mentioned convex portion (3), The thickness is set so that it has enough insulation that it does not feel hot even when held in the hand after heating. However, the other thinner part (2b) has the shape retention strength necessary for use as a container. Set the thickness to give it consistency. The thickness depends on the foaming ratio of the foam and the storage capacity. The thickness of the thick part (2a) is 2 to 6 mm, for example, the thickness of the thick part (2a) is 2 to 6 mm; The thickness of the other portion (2b) is 1 to 4 mm.

[0014] The above-mentioned convex portion (3) may be formed on the entire circumferential surface of the side wall portion (2), In that case, the area occupied by the thick part (2a) due to the convex part (3) increases; This will reduce the heating efficiency during retort sterilization, resulting in thick parts (2a) due to the protrusions. As few as possible, and also so that the container (1) can be gripped by the convex part (3), It is preferable to set the size, spacing, and formation range of the convex portions (3) in advance. For example, in the figure As shown in FIG. It is desirable to form the convex portion (3) only in the central portion in the vertical direction.

[0015] Regarding the form of the above-mentioned convex part (3), as shown in Fig. 4, the vertical convex part (3) is circumferentially In addition to being formed into a wave shape in the direction, continuous or intermittent protrusions can be formed in the circumferential direction, Alternatively, a large number of square or circular convex portions may be placed side by side or scattered (none of these are shown). Various shapes and arrangements are possible. Also, the size and number can be changed arbitrarily. Can be set. Furthermore, the distance between the convex portions (3) is such that the fingers gripping the container (1) can reach the convex portions (3). (3) If it is set so that it does not come into contact with the surface of the other thin part (2b) between good.

[0016] In particular, when the vertical protrusion (3) is used as shown in the figure, the fingers gripping the container (1) As shown by the chain line in Figure 3, the protrusion (3) is in the cross direction, so the protrusion (3) (3) The interval between the two can be set slightly wider. Also, mold cutting after molding the container (1) becomes easier.

[0017] A typical example of the heat-resistant resin that is the material for the container (1) is polyester. Examples include tel-based resins. This polyester resin is an aromatic radical. A high molecular weight chain polyester obtained by reacting dihydric alcohol with bonic acid. Among them, polyethylene terephthalate and polybutylene are used in terms of heat resistance and economy. Those containing lenterephthalate as a main component are particularly preferably used. Also, if necessary Therefore, one side of this resin foam, which will become the inner layer of the container, is coated with gases such as oxygen and nitrogen. A resin film layer (not shown) having excellent barrier properties can be laminated. this For the resin film layer, ethylene-vinyl alcohol copolymer resin, polyvinyl chloride Films made of nylidene resin, nylon resin, etc. are preferably used. in this way When laminating a resin film layer on a foam, its reinforcing effect will cause the outside of the convex portion (3) to The thickness of the thin portion (2b) can be further reduced.

[0018] Depending on the type of food, etc., this container (1) may be filled with synthetic resin sheets, etc. after being filled with food. The lid (4) made of is applied.

[0019] Regarding the shape of the container (1), in addition to the cup shape as shown in the figure, the shape of the container (1) may be a flat surface with a bottom. It can be implemented in various shapes, such as a substantially rectangular tray shape. In addition, the thickness due to the convex part can also be formed on the bottom part.

[0020] The container (1) made of a heat-resistant resin foam such as the above-mentioned polyester resin is In addition to having excellent heat resistance, the material is compared to foamed polystyrene and foamed polypropylene. It has excellent heat resistance and can withstand high temperatures during high-temperature filling of foods and retort sterilization. obtain.

[0021] In particular, the thickness of the thick portion (2a) due to the convex portion (3) of the container side wall portion (2) is reduced by heating. As long as you set it so that it has enough insulation to hold it in your hand after cooking, it will be thin. The insulation of the other part of the meat (2b) is lower than that and it is relatively easy to conduct heat, so Therefore, during retort sterilization, external heat passes through the other thin part (2b) outside the convex part (3). This can be transmitted to the food and drinks inside, making it possible to sterilize retorts without taking much time. I can do it.

[0022] Moreover, when holding the container (1) after cooking in the microwave, the convex part (3) Make sure to grasp the thick part (2b) and avoid touching the other thin part (2b) with your fingers. This allows the container to be easily held without feeling hot, making it easier to handle.

[0023]

[Effect of the idea]

As mentioned above, according to the food and drink container of the present invention, heat-resistant materials such as polyester resin are used. The material is made of polyurethane resin foam, so it cannot be heated during retort sterilization or in the microwave. It has heat resistance that can withstand high temperatures during processing, and has appropriate heat insulation properties.

[0024] In other words, the thick part formed by the convex part on the side wall of the container can be held by hand after cooking. It is possible to maintain a certain level of insulation and reduce the insulation of thin parts other than the convex parts, making it possible to The reduction in heating efficiency due to sterilization can be minimized, and the material is made of non-foamed sheets. Retort sterilization can be performed without significantly increasing the time compared to conventional methods.

[0025] Moreover, after cooking in a microwave oven, the thick part due to the convex part on the outer periphery of the side wall, In other words, it can be held by the insulating part, making it easy to hold without feeling hot. can be handled.

[0026] Therefore, containers made of heat-resistant resin foam can be sterilized by retort sterilization and microwave ovens. It can be particularly suitably used and implemented as a container for retort food, etc., which is intended for heating. become.

[Brief explanation of drawings]

FIG. 1 is a perspective view of a container showing one embodiment of the present invention.

FIG. 2 is a longitudinal cross-sectional view of the container of FIG. 1;

FIG. 3 is a cross-sectional view of the container of FIG. 1;

FIG. 4 is a cross-sectional view of another embodiment.

[Explanation of symbols]

(1)...Food container (2)...Side wall part (2a)...thick part (2b)...other thin parts (3)...Protrusion

Claims (1)

[Scope of utility model registration request] Claim 1: A container whose main material is a heat-resistant resin foam, in which a convex portion is formed in a required range of the outer peripheral surface of the side wall of the container, and the wall thickness of the side wall portion is made thicker or thinner. A container for food and beverages, characterized in that the thick part of the container has heat insulating properties that allow it to be held in the hand after heating.