JP2544105B2 - Shrink tape for microwave oven - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a novel shrink tape for an electric microwave oven, which can be shrunk by heating by a microwave oven to give movement to a part or the whole of an article.

[Conventional technology]

A shrink film is a stretched film,
It has been widely used as a packaging material for product packaging, food packaging, etc., and many types of films are commercially available.

On the other hand, in recent years, the microwave oven is becoming a popular electric appliance that is owned by almost one family because of its safety and convenience.
However, since it has a short history, it is expected that there will be a wider variety of uses in the future.

Therefore, the present inventors focused on the fact that the heating method of the microwave oven is distinctive from the conventional microwave oven and the like and the characteristics of the shrink film, and variously examined the use of the shrink film other than the packaging material. As a result, the present invention has been completed.

[Structure of Invention]

Therefore, the present invention is heat-shrinkable by heat transfer from the container containing the food heated by the microwave oven, the shrinkage ratio is 35% or more heat shrinkable film, and the fixing strength not peeled by heating by the microwave oven. Have
A shrink tape for a microwave oven having fixing means capable of fixing the heat-shrinkable film to a container at least at both ends of the heat-shrinkable film, which is capable of giving movement to a container containing food by heating by a microwave oven. A container for heating a microwave oven including the shrinkable tape for microwave oven.

 Hereinafter, the present invention will be described in detail.

First, in the present invention, the "heat-shrinkable film" refers to a film that heat-shrinks in one direction or two directions (vertical and horizontal ten characters) at a predetermined temperature by heat transfer from an article heated by a microwave oven. As this heat-shrinkable film, a shrink film that is commercially available and easily available can be used as it is.

The shrink film is usually drawn from polyethylene, radiation-exposed polyethylene, polypropylene, polyvinyl chloride, polyvinylidene chloride, polyester, polystyrene, plyofilm, etc. as a raw material (for example, flat biaxial biaxial drawing method, flat simultaneous biaxial drawing method). , Tube type two-stage stretching method, tube type one-stage stretching method, etc.).

In the present invention, any of the above shrink films can be used favorably, but a film having a shrinkage ratio of 35% or more is particularly suitable.

However, the contraction rate is Is represented by

In particular, when the tape is rapidly shrunk when the temperature reaches the predetermined temperature, in the temperature range from about 10 ° C lower than the predetermined temperature to the predetermined temperature, the shrinkage ratio of the film is 45% or more. It is suitable to use a film of which shrinkage is preferably 60% or more, and the material of the film is preferably polyvinyl chloride.

Further, a shrink film having a thickness of 10 μ or more is usually used. The thickness of the film is especially high when strength is required (for example, when the tape is subjected to strong physical work).
45μ or more, preferably 95μ or more is suitable,
In this case, polyethylene and polyvinyl chloride are particularly preferable as the material.

The material of the shrink film can be appropriately selected depending on the desired temperature range in which the shrink film shrinks.

Next, as the "fixing means for fixing the heat-shrinkable film to the article", the heat-shrinkable film can be fixed to the article and the film is not peeled from the article by heating by the microwave oven. Any means can be adopted as long as it is one.

For example, as shown in FIG. 1, the undercoating agent layer 3 and the pressure-sensitive adhesive layer 2 provided on one surface of the heat-shrinkable film 1 can be used as the fixing means. In this case, if the bond strength between the film 1 and the pressure-sensitive adhesive layer 2 is strong, the undercoating agent layer 3 does not necessarily have to be provided.

The pressure-sensitive adhesive layer 2, the subbing agent layer 3 and the support layer 4 having the structure shown in FIG. 2 can be provided as a fixing means on the heat-shrinkable film. If a water absorbing sheet layer 5 is provided in addition to a support layer or the like as shown in FIG. 3 and water is absorbed into the water absorbing sheet layer 5 before heating, the heat transfer from the article does not occur (or heat transfer is insufficient). However, the heat-shrinkable film can be caused to undergo sufficient heat shrinkage. In these cases, if the bond strength between the support layer 4 and the pressure-sensitive adhesive layer 2 is strong, the subbing agent layer 3 is not always necessary.

Here, the “support” may be any as long as it has heat resistance in a microwave oven. Specifically, synthetic resin film tapes such as vinyl chloride, polypropylene, polyethylene, polyester, etc., paper tapes, cloth tapes, rubber tapes, metal foil tapes and the like can be used.

As the "adhesive", natural rubber, recycled rubber, butadiene-acrylonitrile rubber, neoprene rubber, polyurethane rubber, butyl rubber, SBR, polyisoprene rubber and other rubber-based polymers, acrylic resin copolymer and other synthetic resin-based A polymer or the like can be used. Heat-resistant rubber-based polymers such as recycled rubber, butadiene-acrylonitrile rubber, neoprene rubber and polyurethane rubber are preferable from the viewpoint of being able to obtain a sufficient adhesive force even during heating and handling. In addition, the tackiness can be appropriately adjusted by adding a tackifier or a softening agent to these pressure-sensitive adhesives (polymers) in consideration of the shrinkage tension of the heat-shrinkable film.

When the fixing means is provided at other than both ends of the heat-shrinkable film, an adhesive having a strong fixing strength so that the film is not peeled off from the article by the heating by the microwave oven is used at both ends. Other than that, it is preferable to use a pressure-sensitive adhesive having a fixing strength such that it can be peeled from the article by heat shrinkage of the film. This is because the tape can be firmly fixed to the article before heating, and the film can be smoothly heat-shrunk during heating so that the article can perform a desired operation. However, depending on the mode of use, the adhesive other than both ends and the adhesive at both ends may be the same.

Further, a heat insulating material layer may be provided on a part of the fixing means. As a result, it is possible to prevent the heat-shrinkable film in the portion provided with the heat insulating material layer from shrinking and to secure the fixing strength.

As the “subbing agent”, a mixture of the pressure-sensitive adhesive and the support, a graft polymer, or the like can be used, if necessary, in order to strengthen the binding force between the pressure-sensitive adhesive and the support.

Further, if necessary, a cover such as a release paper treated with silicone can be used to cover the adhesive portion when the tape is provided.

As the "water absorbing sheet", a polymeric water absorbing material such as foamed synthetic resin can be used.

When the fixing means is composed of the pressure-sensitive adhesive layer as shown in FIGS. 1 to 3, the pressure-sensitive adhesive layer may be provided not only on one side but also on both sides to form a double-sided adhesive type tape.

Further, as fixing means other than the adhesive system, a locking member (for example, one having a sharp portion for locking an article such as a bandage, a hook), a bite member (for example, a scissors scissors), Fitting, screwing members, etc. can also be used.

〔Example of use〕

The shrink tape for a microwave oven of the present invention, which comprises a heat-shrinkable film and a fixing means, can be used in the following applications, for example. However, it is not limited to these.

(1) Convergence and sealing of bag-shaped container As shown in FIG.
The tape 11 of the present invention is wound around the converging portion 16 of the bag-shaped container 17 containing the. Then heat in the microwave. As a result, the tape of the present invention contracts, and the converging portion of the container converges and is sealed (FIG. 5B).

(2) Molding of foods (dumplings, dumplings, buns, etc.) As shown in FIGS. 6A and 6B, skin-like foods such as dumpling skins.
A film material 20 is wrapped in 18 and wrapped with a film material 20, and the tape 11 of the present invention is wrapped around the film material 20 at an appropriate position on the outer periphery of the film material. Then, when heated in a microwave oven, the skin-like food inside the film material is pressed and bound due to the shrinkage of the tape to be molded into dumplings or the like (Fig. 6-C).

(3) Open / close seal for container lid Container lid with folding 10 as shown in Fig. 4-A.
The shrink tape 11 of the present invention is fixed to the upper surface of 12 perpendicularly to the folding line. Then this container (food (soup)
14) (Fig. 4-B) is heated in a microwave oven. As a result, the tape 11 of the present invention contracts, the lid opens when it is appropriately heated, and the lid opens to show the ready-to-eat state (Fig. 4-C).

On the other hand, when the shrink tape of the present invention is fixed to the inner surface (lower surface) of the lid of the container (not shown), the tension of the tape acts in the direction of closing the lid by heating by the microwave oven, and the lid is sealed with the container. be able to.

〔The invention's effect〕

In the shrink tape for a microwave oven of the present invention, the heat-shrinkable film and the fixing means work together as a result of heating by the microwave oven to allow the article provided with the tape to perform various movements (work). As a result, the shrink tape for a microwave oven according to the present invention can greatly widen the variation in use of the microwave oven.

[Brief description of drawings]

1 is a perspective view of a shrink tape for a microwave oven according to the present invention, FIG. 2 is a plan view and a sectional view of a shrink tape for a microwave oven according to the present invention, and FIG. 3 is a sectional view of a shrink tape for a microwave oven according to the present invention. Is. 4 to 6 show examples of use of the shrink tape for microwave oven of the present invention. 1 ... Heat-shrinkable film, 2 ... Adhesive layer, 3 ... Undercoat layer, 4 ... Support layer, 5 ... Water absorbing sheet layer, 10 ... Fold, 11 ... Shrink tape of the present application , 12 ...... Lid, 13 ...... Container body, 14 ...... Food, 15 ...... Shrink tape of the present application shrunk, 16 ...... Converging part, 17 …… Bag-shaped container, 18 …… Peeled food, 19 …… Dango, 20 ... film material

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Imayoshi Imada Inventor Imayoshi 1-5-7 Mikitei Sakae, Higashi Osaka City House Food Industry Co., Ltd. No. 7 Haus Food Industry Co., Ltd. (56) Reference JP 54-53092 (JP, A) Actual 60-33066 (JP, U) Actual 60-171875 (JP, U)

Claims (9)

(57) [Claims] 1. A heat shrinkage caused by heat transfer from a container accommodating food heated by a microwave oven, and the shrinkage ratio is 35.
% Or more, and a microwave oven having a fixing strength that does not cause peeling due to heating by a microwave oven, and fixing means capable of fixing the heat-shrinkable film to a container at least at both ends of the heat-shrinkable film. A shrink tape for a microwave oven, which can move a container containing food by heating with a microwave oven. 2. The electronic device according to claim 1, wherein the fixing means provided on the heat-shrinkable film other than both ends thereof has a fixing strength such that the heat-shrinkable film is peeled from the article by heat shrinkage of the film. Shrink tape for range. 3. The shrink tape for a microwave oven according to claim 1, wherein the fixing means comprises an undercoating agent and an adhesive. 4. The shrink tape for a microwave oven according to claim 1, wherein the fixing means comprises a support, a subbing agent and an adhesive. 5. The shrink tape for a microwave oven according to claim 1, wherein the fixing means comprises a water absorbing sheet, a support, a subbing agent and an adhesive. 6. The shrink tape for a microwave oven according to claim 1, wherein the fixing means is one member selected from the group consisting of a locking member, a bite member, a fitting member and a screwing member. 7. The heat-shrinkable film is polyethylene, radiation-exposed polyethylene, polypropylene, polyvinyl chloride,
The shrink tape for a microwave oven according to claim (1), which is selected from the group consisting of polyvinylidene chloride, polyester, polystyrene and plyofilm. 8. The shrink tape for a microwave oven according to claim 7, wherein the heat-shrinkable film has a thickness of 45 μm or more. 9. A heat shrinkage by heat transfer from a container accommodating food heated by a microwave oven, and the shrinkage rate is 35.
% Or more, and a microwave oven having a fixing strength that does not cause peeling due to heating by a microwave oven, and fixing means capable of fixing the heat-shrinkable film to a container at least at both ends of the heat-shrinkable film. A shrink tape for use in a microwave oven, comprising a shrink tape for a microwave oven capable of opening a container containing food by heating with a microwave oven.