JPS643748B2 - - Google Patents

Description

[Detailed description of the invention]

<Industrial Application Field> The present invention relates to a tofu container made of synthetic resin, which is formed by vacuum forming or blow molding using a synthetic resin sheet material. <Conventional technology> Conventionally, this type of tofu container made of synthetic resin sheet was
A container made of a synthetic resin sheet material, heated and softened, and molded into a desired shape by a molding method such as a vacuum forming method or a blow molding method,
Tofu producers used to fill a container with uncoagulated tofu stock solution, immediately seal it, use the container itself as a mold for coagulation, solidify the tofu stock solution in the container, and then transfer it directly to the distribution channel. . <Problems to be Solved by the Invention> A manufacturing method in which a container made of such a synthetic resin sheet is used as a mold for coagulation, and the tofu stock solution is coagulated within the container, as described above. If the container is used as a container, the solidified tofu will stick to the container, and when the consumer turns the container upside down to remove the tofu, the connection between the bottom of the container and the surrounding wall, especially the corners, will stick and separate. difficult,
There was a problem in that the upper peripheral portion of the removed tofu, especially the corner portion, easily loses its shape, making it impossible to take out the tofu in a beautiful shape that retains the shape of the container. The cause is that the coagulant that is filled with the stock solution,
It is conceivable that it dissolves in water in the container, precipitates on the surface of the tofu, hardens, and sticks to the inner surface of the container. The problem to be solved by the present invention is to absorb water from solidified tofu, interpose the absorbed water between the container and the tofu, and use this water to float the tofu in the container. That's true. <Means for solving the problem> The means is to coat the inner surface of a container made of a synthetic resin sheet with a moisture absorbing and dehydrating agent for food. <Function> When the uncoagulated stock solution of tofu is filled with a coagulant into the container of the present invention, the top surface of the container is sealed, and the tofu stock solution is coagulated in the container, the moisture absorbing and dehydrating agent for food coated on the inner surface of the container is released. The surface activity dehydrates the tofu in the container and forms a water film between the container and the surface of the tofu. The above problems are solved by preventing them from coming into close contact with each other and making it easier to take them out. <Example> Next, an example of the present invention will be described. First, examples of the method for manufacturing a container according to the present invention will be described. As shown in Figure 1, synthetic resin sheet material 1
A coating agent is sprayed onto one side (lower side in the figure) from a coating agent solvent (suspension) tank T, which is constantly stirred by a stirrer, by a spray nozzle SN via a pump P. A heating booth 3 is installed to transfer the coating agent-sprayed sheet to the next process.
The sheet 2 is heated and softened in order to dry the coating agent, then molded in a molding booth 4 in the next process, cut into single containers in a cutting booth 5 in the next process, and packaged the completed containers in a packaging booth 6. After this process, the tofu is transported to a tofu manufacturer. In the above manufacturing process, the coating agent spray booth 2 is placed in front of the molding booth 4. However, if a drying process is involved, the spray booth 2 will be placed at the next position 2' of the molding booth 4. established,
It will be readily understood that the container may be coated after being molded. Further, the coating means is not limited to spraying means, but may also be a coating method using a roll, or an artificial coating method using a feather or the like as the case may be. As shown in FIG. 2, the shape of the container according to the present invention includes, for example, a rectangular bottom 12 (not necessarily this shape), and a peripheral wall 13 integrally standing from the periphery of the bottom 12. A dish-shaped container 11
A shape in which a horizontal flange portion 14 is integrally provided further outward from the upper edge of the peripheral wall portion 13 is mainly used. The food-grade moisture-absorbing and dehydrating agents used as coating agents in the experiment were soya lecithin extracted from soybeans, which is a raw material for tofu production, and calcium sulfate, which is used as an essential coagulant in tofu production. Calcium sulfate is a monotipe of the hydroxyl group of glyceride, which is used in various foods such as ice cream, mayonnaise, and butter, and is also used as an antifoaming agent in the production of tofu. This is a monoglycerol fatty acid ester and a mixture of the calcium sulfate and monoglycerol fatty acid ester in a ratio of 2:1 (hereinafter referred to as a mixture). The experiment was conducted using the above-mentioned soya lecithin, calcium sulfate, monoglycerin fatty acid ester, and the mixture in that order, but in the case of the first two, the results were not perfect, but compared to the conventional product. This can be said to be an extremely good result. In the case of glycedo, supplementary confirmation tests were also conducted on di- and tri-types with different numbers of hydroxyl groups, and very satisfactory results were obtained, similar to the mono-type. Very satisfactory results were likewise obtained with the mixture. The coating film thickness of the coating agent is minute, so there are variations depending on the manufacturing process of each material, and it is difficult to say that each material is necessarily uniform in thickness, but it is about 1μ and 5μ. Three types of specimens, 1 and 10 μm in diameter, were prepared and used as experimental materials. In addition, we created films with various thicknesses for supplementary confirmation and used them in supplementary experiments, but when the film thickness was about 0.1 μm, the effect was difficult to be seen, and when the film thickness was about 100 μm or more, it was considered unused. It was confirmed that peeling occurred during transportation, when setting in automatic machines, etc., and that there was no need to make it that thick. It was also confirmed that monoglycerol fatty acid ester has good adhesion to the container and acts like an adhesive. For each material, experiments were attempted with at least 500 individuals, but the experimental data below is converted to data for 1000 individuals for each type and displayed.

[Table] As is clear from the above table, very satisfactory results were obtained when monoglycerol fatty acid ester or mixture was used as a coating agent. Since the present inventor is targeting tofu, a food product whose taste is extremely variable and requires delicate adjustment techniques such as coagulation hardness, the inventors have specifically selected a coating agent from among the substances used in the tofu manufacturing process. However, this coating agent is not limited to only the above four types. For example, carboxylic acids and mixtures thereof can also be used as coating agents. <Effects of the Invention> As explained above, the present invention provides a container used in a manufacturing method in which a tofu stock solution is directly filled into the container, and the container itself is used as a mold for coagulating tofu, and the filled stock solution is coagulated within the container. The container is a container made of a synthetic resin sheet material, for example, by blow molding, and the inner surface of the container is coated with a food-grade moisture-absorbing and dehydrating agent, so the manufacturing process is There is no particular cost increase compared to conventional products, and at the same time, the problem of corner chipping when taking out tofu, which was thought to be unsolvable with conventional containers of this type, can be solved with almost no problem. It has a remarkable effect.

[Brief explanation of drawings]

In the drawings, FIG. 1 is a schematic side view showing an example of the manufacturing process of the container of the invention, and FIG. 2 is a perspective view showing an example of the shape of the container of the invention.

Claims (1)

[Claims] 1. A container for tofu made of a synthetic resin sheet whose inner surface is coated with a food-grade moisture-absorbing and dehydrating agent. 2. The tofu container according to claim 1, wherein the coating agent is glyceride. 3. The tofu container according to any one of claims 1 to 2, wherein the coating agent is a monoglycerin fatty acid ester. 4. The tofu container according to claim 1, wherein the coating agent is soya lecithin. 5. The tofu container according to claim 1, wherein the coating agent is calcium sulfate. 6 Coating thickness of coating agent is 0.01~
Claim 1 which is within the range of 0.1mm
The tofu container according to any one of items 5 to 5. 7. The tofu container according to claim 1, wherein the container has a rectangular dish shape. 8. Claim 1 or 7, wherein the container has a dish-like shape with a flange on the outer periphery.
Container for tofu as described in section.