JP3185220U - Thermal insulation foamed resin sheet - Google Patents

Abstract

[PROBLEMS] To easily manufacture, transmit information on the temperature of a container to a viewer, and further to have a heat retaining function, so that the container can be easily and safely gripped from above. A foamed resin sheet for heat insulation is provided.
A heat sensitive material that can function as a temperature indicating material by changing color when a predetermined temperature is reached on a surface that comes into contact with the container when the foamed resin sheet for heat insulation is wound around the outside of the container. The first decorations 1a to 1d by the paint and the second decorations 10a to 10d by the color after the color change are formed by printing. Further, the color change temperatures Ka to Kd are printed on the surface side.
[Selection] Figure 3

Description

  The present invention relates to a foamed resin sheet for heat insulation.

  A person who puts hot or cold drinks in a beverage container such as a paper or resin cup or bottle on the table or is going to eat or drink at a restaurant or store May be handed directly to. In many cases, a person cannot know the temperature of a container simply by looking at the container containing a drink or the like from the outside. If a person touches a container that is very hot, or a container that is very cold, with unforeseen hands, the person may feel uncomfortable and, in extreme cases, the hand may be damaged.

  In order to avoid such inconvenience, several means have been proposed in which a person can obtain information on the temperature of the container simply by looking at the appearance of the container. For example, Patent Document 1 describes a thermochromic beverage container in which a thermochromic image appears or disappears with dynamic vision due to a temperature change on the surface of the beverage container. In addition, in Patent Document 2, a pressure-sensitive adhesive material is provided at least at both ends on the back side of a heat-insulating sheet sufficient to cover the outer peripheral side surface of a can beverage in a roll, and a window with a temperature-sensitive color material is formed at a predetermined position. A heat insulation sheet for canned beverages is described.

Utility Model Registration No. 2597822 Japanese Utility Model Publication No. 6-76143

  The thing described in the said patent document 1 can obtain the information regarding the temperature of a drink container only by seeing the said drink container from the outside. However, when a person drinks the contents, he / she holds the beverage container by hand, but when the container is very hot or very cold, it cannot be held by hand as it is, It is necessary to perform an operation such as using the container. The one described in Patent Document 2 uses a heat-insulating sheet, and also uses a temperature-sensitive color material, so that the container temperature can be known, and the contents can be held by hand and drink the contents. You can also. However, since it has a structure in which a viewing window is formed and a temperature-sensitive color material is attached to that part, it is difficult to manufacture the temperature-sensitive color material and it is difficult to stably hold the temperature-sensitive color material.

  The present invention has been made in view of the above circumstances, is easy to manufacture, can transmit information on the temperature of the container to the viewer, and further has a heat retaining function, so that the container can be provided from above. It is an object of the present invention to disclose a more improved heat-insulating foamed resin sheet that can be easily and safely gripped.

  The heat-insulating foam resin sheet according to the present invention is a heat-insulating foam resin sheet that is used by being wound around the outside of the container, and reaches a predetermined temperature on the surface that comes into contact with the container when wound around the outside of the container. The first decoration with a heat-sensitive paint that can function as a temperature indicating material by changing its color sometimes is applied by printing.

  In the heat-insulating foam resin sheet according to the present invention, the first decoration by the heat-sensitive paint is formed by printing on one surface of the foam resin sheet (the surface that contacts the container when wound around the outside of the container). And its manufacture, ie the formation of the first decoration, is very easy. Further, the first decoration by printing does not easily peel off and is stably held for a long period of time. A person can easily obtain information on the temperature of the container around which the foam resin sheet for heat insulation is wound only by looking at the color of the first decoration, and since the foam resin sheet is highly heat-insulating, The container can be held safely through the heat-insulating foamed resin sheet without feeling uncomfortable. In addition, since the foamed resin sheet is rich in heat retention, it contributes to maintaining the temperature of the contents of the container, and also prevents condensation.

  In a preferred aspect, the heat-insulating foamed resin sheet according to the present invention is characterized in that the second decoration having the color after the discoloration of the first decoration is applied in the vicinity of the first decoration by printing. . In the case of using the heat-insulating foamed resin sheet of this aspect, whether or not the temperature of the beverage in the container is a desired temperature by comparing the color of the first decoration and the color of the second decoration. I can know.

  In a preferred embodiment, the heat-insulating foamed resin sheet according to the present invention comprises two or more first decorations and two or more first decorations by two or more kinds of heat-sensitive paints having different temperatures and discolored colors. It is characterized in that two or more second decorations having the color after the discoloration are applied in the vicinity of each first decoration. More preferably, in the above-mentioned heat insulating foamed resin sheet, there is information relating to the temperature at which the heat-sensitive paint forming the first decoration changes in the vicinity of the second decoration on the surface side of the heat insulating foamed resin sheet. It is printed.

  In the heat-insulating foamed resin sheet of this aspect, a person can visually recognize which one of the plurality of first decorations is the same as the color of the second decoration corresponding to the first decoration. The temperature of an object etc. can be known with higher accuracy. Even when the temperature changes with time, the temperature of the beverage in the container at that time can be known. When the temperature corresponding to each color is printed as a numerical value, a person can recognize the temperature more reliably.

  In the heat-insulating foamed resin sheet according to the present invention, the sheet as the base material has the first decoration printed on the back surface, that is, the surface that comes into contact with the container when wrapped around the outside of the container, from the outside, that is, the front surface side. Any foamed resin sheet can be used on the condition that it can be visually recognized. Examples include a foamed polyethylene sheet, a foamed polypropylene sheet, and a foamed polystyrene sheet. Preferably, the sheet is a white sheet that does not contain a pigment or dye so that the visibility is not hindered.

  Also, the expansion ratio of each foamed resin sheet may be set as appropriate on the condition that it has the above-mentioned visibility and has the required heat insulation properties, and is not limited, but the expansion ratio is usually in the range of 10 to 50 times. If so, the desired objective can be achieved. Although it depends on the material of the sheet and the expansion ratio, the thickness of the foamed resin sheet is preferably in the range of 0.5 to 2 mm on the condition that the visibility is ensured.

  In a more preferred embodiment of the heat-insulating foamed resin sheet according to the present invention, the resin sheet as the base material is a foamed polyethylene resin sheet having a thickness of 1.0 mm or less and an expansion ratio of 20 to 40 times, and a pigment or dye It is a white sheet that does not contain. In particular, the foamed polyethylene sheet is more flexible than other foamed resin sheets and can easily carry paint, so that the first and second decorations after printing are not easily peeled off, that is, highly stable heat retention. A foamed resin sheet is obtained.

  According to the present invention, manufacturing is easy, information on the temperature of the container can be surely transmitted to a viewer, and a heat retaining function is provided so that the container can be easily and safely gripped from above. Thus, a more improved foam resin sheet for heat insulation can be obtained.

The front view (a) which shows an example of the foaming resin sheet for heat retention by this invention, and the figure (b) which shows the state wound around the outer side of the container. The front view which shows the other example of the foaming resin sheet for heat retention by this invention. The front view which shows the further another example of the foaming resin sheet for heat retention by this invention.

Hereinafter, the present invention will be described based on embodiments.
Fig.1 (a) is a figure which shows an example of the foaming resin sheet for heat retention by this invention seeing from the front side, and FIG.1 (b) is a figure which shows the state wound around the outer side of the container. In this example, the container is shown as a cup A having a shape that gradually increases in diameter from the lower end upward, but the container is a bottle, such as a bottle or a can, whose diameter is substantially the same. Also good.

  In this example, the foam resin sheet B for heat insulation used together with the cup A has a fan shape, and covers about 50 to 90% of the height of the cup A and the height of the cup A. It has a width that can be. In addition, although not shown in figure, when using with bottles, such as a bottle and a can whose diameter of a trunk | drum is substantially the same, the foaming resin sheet B for heat insulation becomes a rectangle.

  In this example, the heat-insulating foamed resin sheet B is a 0.5 mm thick white type, that is, a foamed polyethylene sheet containing no pigment or dye, and the expansion ratio is approximately 30 times. On the back surface of the heat-insulating foamed resin sheet B, a first decoration 1 made of a heat-sensitive paint that can function as a temperature indicating material by changing color when reaching a predetermined temperature is formed by printing. As shown in the figure, the first decoration 1 can be viewed from the front side.

  On the surface side in the vicinity of the first decoration 1, information 2 relating to the temperature of the first decoration 1 is provided by printing with a general paint. As information 2, for example, “The color of the first decoration 1 is the color x at room temperature, but when it is the color y, it indicates that the cup temperature is approximately K ° C.”. Can be mentioned.

  This heat-insulating foamed resin sheet B is placed, for example, in a restaurant or a fast food store, and when the store clerk puts an appropriate beverage in the cup A and provides it to the customer, as shown in FIG. Used by wrapping around cup A. As an example, it is assumed that the beverage is coffee having a temperature exceeding 50 ° C., and the heat-sensitive paint that forms the first decoration 1 is a heat-sensitive paint that changes from color x to color y in the vicinity of 50 ° C. In that case, the information 2 about the temperature of the first decoration 1 is “the color of the first decoration 1 is the color x at room temperature, but when the color is y, the temperature of the cup A is 50 ° C. It indicates that the temperature is above. Please be careful. "

  Accordingly, the customer knows how many times the temperature of the cup A containing the coffee is higher or lower than the temperature of the first decoration 1 and the information 2 printed in the vicinity thereof. be able to. In addition, since the heat-insulating foamed resin sheet B is made of foamed resin and has high heat insulation properties, even if the high-temperature cup A is held by hand, there is no feeling of discomfort due to high temperature or low temperature. Note that, in FIG. 1A, region 3 is a joining margin by glueing or the like when wrapping around the cup A.

  FIG. 2 shows another example of a foam resin sheet for heat insulation according to the present invention. In this heat-insulating foamed resin sheet B1, the information 2 relating to the temperature of the first decoration 1 is not printed. Instead, the heat-sensitive paint that is the color x at the room temperature for forming the first decoration 1 has a predetermined temperature or higher. A pattern having the same color as the color y that changes color when the color becomes the second decoration 10 is printed in the vicinity of the first decoration 1 with a general paint. And the printed pattern (2nd decoration 10) can also be visually recognized from the surface side of the foam resin sheet B1 for heat retention. Furthermore, in this example, on the front surface side in the vicinity of the second decoration 10 formed on the back surface, the temperature K when the heat-sensitive paint forming the first decoration 1 changes color, in this example “50 ° C.”. Numeric values are printed. Although not shown, information 2 relating to the temperature of the first decoration 1 may be provided also in the heat-insulating foamed resin sheet B1.

  The insulated foam resin sheet B1 is used in the same manner as the insulated foam resin sheet B. The customer compares the first pattern 1 and the second pattern 10 to determine whether the color of the first pattern 1 is the same as the color of the second pattern 10 and the temperature of the cup A containing the coffee. It is possible to know how many times it is (in this example, whether it is 50 ° C. or higher).

  FIG. 3 shows still another example of the foam resin sheet for heat insulation according to the present invention. This heat insulating foamed resin sheet B2 is different from the above-mentioned heat insulating foamed resin sheets B and B1 in that a plurality of sets of the first decoration 1 and the second decoration 10 are provided. That is, in the heat-insulating foamed resin sheet B2, two or more (four in the illustrated example) thermal coatings differing in both the temperature at which the color changes and the color after the discoloration (four in the illustrated example) are different on the back side. Four types of first decorations 1a to 1d and two or more (four types in the drawing) second decorations 10a to 10d having colors after the color change of the first decorations 1a to 1d are provided. It is formed by printing in the vicinity of one decoration 1a to 1d. Further, the temperatures Ka to Kd when the respective heat-sensitive paints change color are also printed on the surface side as numerical values (in this example, numerical values of 40, 50, 60, and 70).

  Specifically, the color of the first decoration 1a before the color change is x1, the color change temperature is Ka (40 ° C.), and the color after the color change is y1. The color of the first decoration 1b before the color change is x2, the color change temperature is Kb (50 ° C.), and the color after the color change is y2. The color of the first decoration 1c before the color change is x3, the color change temperature is Kc (60 ° C.), and the color after the color change is y3. The color of the first decoration 1d before the color change is x4, the color change temperature is Kd (70 ° C.), and the color after the color change is y4.

  This heat retaining foamed resin sheet B2 is used in the same manner as the heat retaining foamed resin sheets B and B1. The customer compares the colors of the first patterns 1a to 1d and the second patterns 10a to 10d, and whether any of the colors of the first patterns 1a to 1d is the same as the colors of the second patterns 10a to 10d. , The temperature of the cup A can be known more accurately. For example, if only the first pattern 1a is the same as the color of the second pattern 10a, the temperature of the cup A is less than 50 ° C., and the first patterns 1a and 1b are the second pattern 10a. 10b, the temperature of the cup A is less than 60 ° C., and the first patterns 1a, 1b, and 1c are the same as the colors of the second patterns 10a, 10b, and 10c. If the temperature of the cup A is less than 70 ° C. and the first patterns 1a, 1b, 1c and 1d are the same as the colors of the second patterns 10a, 10b, 10c and 10d, It can be seen that the temperature of the cup A is 70 ° C. or higher.

  In any case, since the customer grips the cup A via the heat-insulating foamed resin sheet B2, which is a heat insulating layer, the customer does not feel the temperature of the cup A directly and may have a discomfort due to the high temperature. Absent.

Hereinafter, examples of the heat-insulating foamed resin sheet according to the present invention will be described.
White foamed polyethylene sheet manufactured by Sekisui Plastics Co., Ltd. (trade name: Lightlon: expansion ratio 30 times, thickness 0.5 mm, width: about 65 m, lower arc length: about 185 mm, upper arc length: about 220 mm) On one side, product numbers R-4, R-5, R-6, R-7 (see Table 1) of heat-sensitive paint “trade name Thermo Paint R” (reversible) manufactured by NOF Corporation are shown in FIG. As in the first decorations 1a to 1d shown in FIG. Next to each line, color samples with different colors were printed with a general paint as in the second decorations 10a to 10d shown in FIG. It was deformed into the shape of a cup and the ends were bonded to form a ring.

Drop the cup into the ring-shaped sheet and pour warm water at 45 ° C, 55 ° C, 66 ° C, 75 ° C to change the color of the heat-sensitive paint (Part Nos. R-4, R-5, R-6, R-7) Changes were observed. Also, immediately after pouring warm water, the cup was grasped by hand through the sheet and lifted, but the fingertips did not feel uncomfortable heat.

A ... Cup,
B ... Foamed resin sheet for heat retention,
1 (1a-1d) ... 1st decoration,
2 Information on the temperature of the first decoration,
10 (10a to 10d): second decoration K (Ka to Kd) by the color after the color change: display of the color change temperature

Claims (5)

  A foamed resin sheet for thermal insulation that is used by wrapping around the outside of the container, and the surface on the side that comes into contact with the container when wound around the outside of the container is discolored when it reaches a predetermined temperature. A heat-insulating foamed resin sheet, wherein the first decoration with a heat-sensitive paint capable of functioning is applied by printing.   The foamed resin sheet for heat insulation according to claim 1, wherein the second decoration having a color after the color change of the first decoration is printed in the vicinity of the first decoration.   Two or more second decorations having two or more kinds of the first decorations and two or more first decorations of the two or more first decorations by two or more kinds of heat-sensitive paints having different temperatures and colors after the color change. The foamed resin sheet for heat insulation according to claim 2, wherein the decoration is applied in the vicinity of each first decoration.   The information regarding the temperature when the heat-sensitive paint that forms the first decoration changes color is printed in the vicinity of the second decoration on the surface side of the foam resin sheet for heat insulation. The foamed resin sheet for heat insulation as described in any one of thru | or 3.   5. The sheet according to claim 1, wherein the sheet is a foamed polyethylene resin sheet having a thickness of 1.0 mm or less and an expansion ratio of 10 to 50 times, and is a white sheet containing no pigment or dye. The foamed resin sheet for heat insulation as described.

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