JP5920615B2 - Microwave packaging bag - Google Patents

Description

  The present invention belongs to the technical field of packaging bags for containing foods, and particularly relates to a packaging bag for microwave ovens that can be cooked by a microwave oven while foods are stored.

  Conventionally, packaging bags for microwave ovens in which various retort foods such as curry and Chinese food are encapsulated are commercially available. And when cooking with a microwave oven, in order to prevent that the water | moisture content contained in the content boils and internal pressure rises and a bag bursts, the packaging bag which gave the device of steam removal has been proposed. Among them, many packaging bags have been proposed in which a back seal portion is provided on the packaging bag, a part of the back seal portion is set as a weak seal portion, and vapor is released by peeling off by the vapor pressure. Some packaging bags have been put to practical use.

JP-A-11-29181 JP 2000-25850 A JP 2001-270536 A JP 2005-8260 A

  The conventional microwave oven packaging bag as described above has a problem in that the manufacturing cost increases because it is necessary to form a back seal portion having a weak seal portion in part. Moreover, although the upper part of a bag is cut off and opened after heat cooking, since the contents have adhered to the opening part, there also exists a problem that a hand is easily soiled when opening or taking out the contents. Moreover, depending on the direction of the bag after cooking, the contents may leak from the steam passage port formed in the back seal portion.

  The present invention has been made in view of the problems of conventional microwave oven packaging bags. The object of the present invention is to reduce the manufacturing cost, and the contents leak during cooking and after handling. An object of the present invention is to provide a microwave oven packaging bag that can reduce the number of situations that occur, and that is not easily soiled when opening or taking out the contents.

To achieve the above object, the microwave oven packaging bag according to the present invention comprises a packaging material formed by laminating a sealant layer on an inner surface, has a side seal portion to at least the left and right both sides, heating while forming an opening A microwave oven packaging bag of the type to be cooked, wherein a protruding piece straddling the left and right side seal portions protrudes on either the outer surface of the front side or the back side, and the protruding piece is a side An intermediate seal part straddling the seal part is provided, and the protruding piece has no vaporizing means.

The packaging bag for a microwave oven of the present invention is sold in a state where the contents are put and the opening is sealed or only in the bag. For the type sold with the contents in place, cut and open the end of the bag, add seasonings and ingredients as needed, and then use the base of the protruding piece as the starting point for the packaging bag. The portion above the protruding piece is cooked in a microwave oven in a state where the portion is folded back to the opposite side from the protruding piece toward the portion below the protruding piece of the packaging bag . On the other hand, for the type sold only in the bag, meat and vegetables are put together with seasonings from the opening, and the portion above the protruding piece of the packaging bag is similarly used from the protruding piece of the packaging bag, starting from the root part of the protruding piece. Cook in a microwave oven in a state folded back to the opposite side of the protruding piece toward the lower part . After the food in the bag is cooked in this manner, the contents of any type are taken out after returning the portion above the protruding piece of the packaging bag to straighten the bag. Alternatively, the bag can be used as it is as a container.

Thus, when cooking in a microwave oven, the upper part of the packaging bag is not bonded, so the steam passage is formed before the internal pressure of the bag increases, allowing the steam to escape. . Therefore, the contents do not pop out and can be cooked safely. In addition, since the projecting piece has an intermediate seal portion, return (repulsion where the folded portion tries to return) is suppressed, and if the internal pressure does not increase, a steam passage is not formed, and a certain amount of steam is contained in the bag. Therefore, it is also suitable for cooking that requires pressure or steamed cooking.

Microwave packaging bag of the present invention, as a base point the root portion of the protruding piece, the upper portion than the projecting pieces of the packaging bag, on the side opposite to the projecting piece toward the lower portion than the projecting pieces of the packaging bag Since it is put on the microwave oven in a folded state, the contents are less likely to adhere to the upper part of the protruding piece of the packaging bag, and the hands are less likely to get dirty when the contents are taken out after cooking. In addition, since the microwave oven is heated with the upper part of the packaging bag over the protruding piece, the contents will not spill out or spill out even if the bag falls over during heating in the microwave oven. I'll do it. Moreover, it is only necessary to form the protruding piece in the bag, and it is not necessary to form a weak seal portion on the back seal portion as in the conventional case, so that it can be easily manufactured and the manufacturing cost can be kept low. it can.

It is an isometric view explanatory drawing which shows an example of the packaging bag for microwave ovens of 1st Embodiment. It is a cross-sectional explanatory drawing in the AA line of FIG. It is a perspective explanatory view which shows the return state of the packaging bag for microwave ovens of FIG. It is sectional explanatory drawing which shows the return state of the packaging bag for microwave ovens of FIG. It is a perspective explanatory view which shows another aspect of the packaging bag for microwave ovens of FIG. FIG. 6 is a cross-sectional explanatory view taken along line AA in FIG. 5. It is sectional explanatory drawing which shows the modification of the packaging bag for microwave ovens of FIG. It is perspective explanatory drawing which shows the packaging bag for microwave ovens of 2nd Embodiment. FIG. 9 is a cross-sectional explanatory view taken along line AA in FIG. 8. It is a perspective explanatory view which shows the return state of the packaging bag for microwave ovens of FIG. It is sectional explanatory drawing which shows the folding | turning state of the packaging bag for microwave ovens of FIG. It is a perspective explanatory view which shows another aspect of the packaging bag for microwave ovens of FIG. FIG. 13 is a cross-sectional explanatory view taken along line AA in FIG. 12. It is sectional explanatory drawing which shows the packaging bag for microwave ovens of FIG. 8 changing a packaging material. It is a perspective explanatory view showing a modification of the packaging bag for microwave oven of FIG. It is sectional explanatory drawing in the AA of FIG. It is a perspective explanatory view which shows another aspect of the packaging bag for microwave ovens of FIG. It is sectional explanatory drawing in the AA of FIG. It is sectional explanatory drawing which shows the modification of the packaging bag for microwave ovens of FIG. It is sectional explanatory drawing which shows the modification of the packaging bag for microwave ovens of FIG. It is an isometric view explanatory drawing which shows the packaging bag for microwave ovens of 3rd Embodiment. It is a perspective explanatory view which shows another aspect of the packaging bag for microwave ovens of FIG. It is sectional explanatory drawing which shows the packaging bag for microwave ovens of 4th Embodiment. It is sectional explanatory drawing which shows the return state of the packaging bag for microwave ovens of FIG. It is sectional explanatory drawing which shows another example of the packaging bag for microwave ovens of 4th Embodiment. FIG. 26 is a cross-sectional explanatory view showing a folded state of the microwave packaging bag of FIG. 25. It is sectional explanatory drawing which shows another example of the packaging bag for microwave ovens of 5th Embodiment. It is sectional explanatory drawing which shows the return state of the packaging bag for microwave ovens of FIG. It is a perspective explanatory view which shows another aspect of the packaging bag for microwave ovens of FIG. It is an isometric view explanatory drawing which shows the modification of the seal pattern of an intermediate seal part. It is a perspective explanatory view which shows the state which attached the sleeve to the packaging bag for microwave ovens of FIG. FIG. 32 is a perspective explanatory view showing a usage state of the microwave packaging bag of FIG. 31.

  Next, embodiments of the present invention will be described in detail with reference to the drawings.

[First Embodiment]
A microwave packaging bag 10 shown in FIG. 1 is in the form of a flat pouch. As shown in FIG. 2, a packaging material 11 having a longer vertical size folded in two at the bottom and a packaging having a shorter vertical size are shown. The protruding piece P is provided by the material 12 in a protruding state. An intermediate seal portion 13 is formed on the protruding piece P. The intermediate seal portion 13 is formed so as to straddle the left and right side seal portions 14 and is formed up to the root portion of the protruding piece P. Further , the intermediate seal portion 13 is formed so as to be orthogonal to the side seal portions 14 on the left and right sides. The left and right side seal portions 14 are each formed with a notch 15 for opening at a corresponding position above the protruding piece P.

  The manufacturing procedure of the microwave oven packaging bag 10 by the bag making machine is as follows, for example. While a single packaging material is being conveyed by the bag making machine, first, the sheet is conveyed so that the left and right ends face each other, and the bottom portion is folded and the intermediate seal portion 13 is formed simultaneously. Next, after the left and right seals are performed to form the side seal portion 14, the opening notch 15 is punched out, and the upper side is cut off in the subsequent process to form a filling port. Finally, it is cut with a guillotine blade so as to separate one bag at the side seal portion 14. Thereby, the packaging bag 10 for microwave ovens shown in FIG. 1 is manufactured. In this example, the bottom seal is not formed, but a bottom seal may be formed as necessary.

The packaging bag 10 for microwave ovens shown in FIG. 1 is sent to the filling process in a state where a plurality of the packaging bags 10 are collected, and the contents are filled there. Specifically, the upper side seal portion 16 is formed by filling the contents from the opening on the upper side and heat-sealing the portion indicated by the dotted line in FIG. 1 so as to close the opening. By passing through such a filling process, the microwave packaging bag 10 has a side seal portion 14 on both the left and right sides, and an upper side seal portion 16. by breaking, it can be opened to form an open mouth end inside the part from the upper side seal portion 16. Then, the protruding piece P straddling the left and right side seal portions 14 is provided on either the outer surface of the front surface side or the back surface side at a position further inside than the portion serving as the opening end.

The microwave oven packaging bag 10 filled with the contents in this way is sold as it is or in another bag or paper box. Then, the bag end is cut off from the opening notch 15 and opened. For example, when the content is a retort food, as shown in FIGS. 3 and 4, the protrusion of the packaging bag starts from the root of the protruding piece P. When the part above the piece P is folded back toward the part below the projecting piece P of the packaging bag, the part above the projecting piece P of the packaging bag has the projecting piece P. Thus, the return (repulsion where the folded portion tries to return to the original state) is suppressed, and in the folded state, cooking can be performed in a microwave oven. In addition, when the content is a seasoning seasoning, after opening the ingredients such as vegetables and meat after opening, as shown in FIG. 3 and FIG. 4, the protruding piece of the packaging bag with the root portion of the protruding piece P as a base point The portion above P can be folded back to the opposite side from the protruding piece P toward the portion below the protruding piece P of the packaging bag, and can be cooked in the same manner.

After the food in the bag is cooked in this way, the contents above are taken out after returning the portion above the protruding piece P of the packaging bag to straighten the bag. Alternatively, the bag can be used as a container as it is. During this cooking, a path for steam is formed in a portion above the projecting piece P of the packaging bag before the internal pressure of the bag increases, and steam can escape through the gap. Therefore, the contents do not pop out and can be cooked safely. Further, if the internal pressure does not increase, the passage of steam is not formed, and the bag is filled with a certain amount of steam, so that it is also suitable for cooking that requires pressure or steamed cooking.

  Another embodiment of the microwave packaging bag 10 shown in FIG. 1 is shown in FIGS. FIGS. 5 and 6 correspond to FIGS. 1 and 2, respectively, and this microwave packaging bag 10 is a type that is sold only in a bag in an opened state, like an opening notch 15 at the top of the bag. There is no easy opening means.

When using this packaging bag 10 for microwave ovens, meat and vegetables are put together with seasonings and the like from the upper opening , and the packaging bag with the root portion of the protruding piece P as the base point, as shown in FIGS. When the portion above the protruding piece P of the packaging bag is folded back to the opposite side of the protruding piece P toward the lower portion of the protruding piece P of the packaging bag, the protruding piece P is located above the protruding piece P of the packaging bag. As a result, the return (repulsion where the folded portion tries to return to the original state) is suppressed, and cooking can be performed in the folded state in the microwave oven.

After the food in the bag is cooked in this way, the contents above the protruding piece P of the packaging bag are returned, the bag is straightened, and the contents are taken out. Alternatively, the bag can be used as it is as a container. Even at the time of cooking, the portion above the protruding piece P of the packaging bag is not bonded, so that a steam passage is formed before the internal pressure of the bag increases, so that the steam can escape. Therefore, the contents do not pop out and can be cooked safely. Further, if the internal pressure does not increase, the passage of steam is not formed, and the bag is filled with a certain amount of steam, so that it is also suitable for cooking that requires pressure or steamed cooking.

A modification of the microwave packaging bag 10 shown in FIG. 1 is shown in FIG. FIG. 7 corresponds to FIG. 2, and the microwave packaging bag 10 shown in FIG. 7 is obtained by retrofitting a protruding piece P to a flat pouch. That is, the upper and lower packaging materials 11A are opposed in a folded state with the sealant layer inside, and then bonded in a straight line at the side seal portions on the left and right sides, and opening notches are formed on the left and right side seal portions, respectively. After that, the protruding piece P straddling the left and right side seal portions is stuck to the outer surface of either the front surface side or the back surface side at a position inside the notch for opening. The protruding piece P consists of a rectangular packaging material, by Rukoto bonding portions facing bent in a T-shape with a hot-melt after forming the intermediate seal portion 13A, the microwave packaging bag 10 Install with hot melt. You may attach with an adhesive agent and a heat seal not only hot melt. Further, in this example, the protruding piece P is retrofitted so as to straddle the left and right side seal portions, but it may be attached inside the side seal portion. It goes without saying that such a projecting piece P can be similarly applied to a microwave packaging bag of the type sold without an upper seal portion.

[Second Embodiment]
The packaging bag 20 for microwave ovens shown in FIG. 8 is in the form of a standing pouch. As shown in FIG. 9, the packaging material 21 having a longer top and bottom size W-folded at the bottom, and the packaging having the shorter top and bottom size. The projecting piece P is provided in a state of protruding by the material 22 . An intermediate seal portion 23 is formed on the protruding piece P. The intermediate seal portion 23 is formed so as to straddle the left and right side seal portions 24 and is formed up to the root portion of the protruding piece P. Further , the intermediate seal portion 23 is formed so as to be orthogonal to the side seal portions 24 on both the left and right sides. The left and right side seal portions 24 are respectively formed with opening notches 25 at corresponding positions above the protruding pieces P.

  The manufacturing procedure of the microwave oven packaging bag 20 by the bag making machine is as follows, for example. While transporting one piece of packaging material with the bag making machine, first, punch hole processing is performed to form bottom holes necessary for bonding both ends of the bottom of the standing pouch on the front and back. Next, the left and right end portions are conveyed to face each other, and the bottom portion is folded and the intermediate seal portion 23 is formed at the same time. Next, after performing the parabolic bottom seal and the linear side seal to form the bottom seal portion 26 and the side seal portion 24, the opening notch 25 is punched in the subsequent process, and the upper side is cut off to form the filling port. . Finally, it is cut with a guillotine blade so as to separate one bag at the side seal portion 24. Thereby, the packaging bag 20 for microwave ovens shown in FIG. 8 is manufactured.

The packaging bag 20 for microwave ovens shown in FIG. 8 is sent to the filling step in a state where a plurality of the packaging bags 20 are collected, and the contents are filled there. Specifically, the upper side seal portion 27 is formed by filling the contents from the opening on the upper side and heat-sealing the portion indicated by the dotted line in FIG. 8 so as to close the opening. Through such a filling process, the microwave packaging bag 20 has an upper seal portion 27 in addition to the side seal portions 24 and the bottom seal portion 26 on both the left and right sides, and the opening notch 25 is removed. by breaking takes on to packaging material, it can be opened to form an open mouth end inside the part from the upper side seal portion 27. Then, the protruding piece P straddling the left and right side seal portions 24 is provided on either the outer surface of the front surface side or the back surface side at a position further inside than the portion serving as the opening end.

The microwave packaging bag 20 filled with the contents in this way is sold as it is or in another bag or paper box. Then, opened by cutting the bag ends from opening notch 25, after adding seasonings and ingredients as required, as shown in FIGS. 10 and 11, as a base point the root portion of the protruding piece P, packaging When the portion above the projecting piece P of the bag is folded back to the side opposite to the projecting piece P toward the portion below the projecting piece P of the packaging bag, the portion above the projecting piece P of the packaging bag becomes the projecting piece P. Therefore, the return (repulsion where the folded portion tries to return to the original state) is suppressed, and in the folded state, cooking can be performed in a microwave oven. In addition, in the case of rice that has been polished, after a predetermined amount of water has been added after opening, as shown in FIGS. 10 and 11, the protruding piece P of the packaging bag is based on the root of the protruding piece P. It is possible to cook rice in a microwave oven in a state where the upper part is folded back to the opposite side from the protruding piece toward the lower part of the protruding piece P of the packaging bag .

After the food in the bag is cooked in this way, the contents above are taken out after returning the portion above the protruding piece P of the packaging bag to straighten the bag. Alternatively, the bag can be used as a container as it is. Even during this cooking, a path for steam is formed in a portion above the projecting piece P of the packaging bag before the internal pressure of the bag increases, and steam can escape through the gap. Therefore, the contents do not pop out and can be cooked safely. Further, if the internal pressure does not increase, the passage of steam is not formed, and the bag is filled with a certain amount of steam, so that it is also suitable for cooking that requires pressure or steamed cooking. Since the microwave packaging bag 20 is a standing pouch, the microwave oven packaging bag 20 can be cooked in a standing state in a microwave oven, or can be in a standing state when used as a container.

  Another embodiment of the microwave packaging bag 20 shown in FIG. 8 is shown in FIGS. FIGS. 12 and 13 correspond to FIGS. 8 and 9, respectively. This microwave oven packaging bag 20 is a type that is sold only in a bag in an open state, like an opening notch 25 at the top of the bag. There is no proper opening means.

In using this microwave packaging bag 20 is placed in meat and vegetables with seasonings or the like from the upper opening, in the same manner as shown in FIGS. 10 and 11, as a base point the root portion of the protruding piece P, packaging The portion above the projecting piece P of the bag is folded back to the side opposite to the projecting piece P toward the portion below the projecting piece P of the packaging bag, and is heated and cooked over the microwave oven in the folded state. it can. After the food in the bag is cooked in this way, the contents above the protruding piece P of the packaging bag are returned, the bag is straightened, and the contents are taken out. Alternatively, the bag can be used as it is as a container. Even at the time of cooking, the portion above the protruding piece P of the packaging bag is not bonded, so that a steam passage is formed before the internal pressure of the bag increases, so that the steam can escape. Therefore, the contents do not pop out and can be cooked safely. Further, if the internal pressure does not increase, the passage of steam is not formed, and the bag is filled with a certain amount of steam, so that it is also suitable for cooking that requires pressure or steamed cooking.

Although the microwave packaging bag 20 shown in FIG. 8 has a structure made up of two packaging materials 21 and 22, it may have a structure made up of four packaging materials as shown in FIG. That is, one side of the front and back is composed of a long packaging material 21A, and the other side of the front and back is composed of two packaging materials 21B and 22 having a short vertical size, and the other two packaging materials 21B and 22 project. It is provided in a state where the piece P protrudes and is opposed to the packaging material 21A on one side. An intermediate seal portion 23 is formed on the protruding piece P. The intermediate seal portion 23 is formed so as to straddle the left and right side seal portions 24 and is formed up to the root portion of the protruding piece P. Then, between the opposing front and back packaging materials (the packaging materials 21A and the packaging materials 21B and 22), the packaging material 21C having an inverted V-shaped cross section is interposed, and the bottom seal portion 26 is bonded together in a radial pattern, and It is good also as a structure bonded together linearly by the side seal part 24 of the right-and-left both sides. In addition, it is the same also about the packaging bag 20 for microwave ovens shown in FIG.

The modification of the packaging bag 20 for microwave ovens shown in FIG. 8 is shown in FIG.15 and FIG.16. FIGS. 15 and 16 correspond to FIGS. 8 and 9, respectively, and the microwave packaging bag 20 is the same in the form of a standing pouch, but the bottom is not sealed. It is different in that it is W-folded. The microwave packaging bag 20 is provided with a protruding piece P protruding by a longer packaging material 21 W-folded at the bottom and a shorter packaging material 22 folded at the lower end . An intermediate seal portion 23 is formed on the protruding piece P. The intermediate seal portion 23 is formed so as to straddle the left and right side seal portions 24 and is formed up to the root portion of the protruding piece P. Since the bottom of the microwave packaging bag 20 swells when the contents are filled, the content of the microwave packaging bag 20 is larger than that of the microwave oven packaging bag 20 shown in FIGS. When manufacturing a standing pouch with the bottom folded in W, a plate may be inserted to form the bottom folded portion instead of the step of bottom sealing.

  Another embodiment of the microwave packaging bag 20 shown in FIG. 15 is shown in FIGS. 17 and 18. FIGS. 17 and 18 correspond to FIGS. 15 and 16, respectively. This microwave packaging bag 20 is a type that is sold only with the bag open, and has an opening notch 25 at the top of the bag. There is no proper opening means. And the usage method of this packaging bag 20 for microwave ovens is the same as that of the case of the packaging bag 20 for microwave ovens of FIG.12 and FIG.13.

A modification of the microwave packaging bag 20 shown in FIG. 8 is shown in FIG. FIG. 19 corresponds to FIG. 9, and the microwave packaging bag 20 is obtained by retrofitting a protruding piece P similar to that described in FIG. 7 to a standing pouch. It goes without saying that such a protruding piece P can be similarly applied to a microwave packaging bag 20 that is sold only in the bags shown in FIGS. 12 and 17.

A modification of the microwave packaging bag 20 shown in FIG. 12 is shown in FIG. The microwave packaging bag 20 is provided with notches 28 as dividing means at corresponding positions below the protruding pieces P with respect to the left and right side seal portions 24. This microwave packaging bag 20 can be used as a container by dividing the bag after cooking at the notch 28, so that the standing pouch shown in FIG. It is effective to provide a self-supporting packaging bag at the beginning. In addition, a parting means is not restricted to the notch 28, The packaging material which provided the half cut line in the base material may be used, and the packaging material which laminated | stacked the film extended | stretched in the width direction may be used.

[Third Embodiment]
The microwave packaging bag 30 shown in FIG. 21 is in the form of a gusset bag having folds on the bottom and both sides. Specifically, one side of the front and back is made of a packaging material 31 having a long vertical size, and the other side of the front and back is provided in a state where the protruding piece P protrudes by two packaging materials 32A and 32B having a short vertical size . An intermediate seal portion 33 is formed on the protruding piece P. The intermediate seal portion 33 is formed so as to straddle the left and right side seal portions 34 and is formed up to the root portion of the protruding piece P. Further, the other side packaging material 32A, 32B is opposed to the one side packaging material 31, and the cross section has an inverted V shape between the opposed front and back packaging materials (the packaging material 31 and the packaging materials 32A, 32B). The three packaging materials, that is, the packaging material 34 on the bottom and the packaging material 35 on both sides, respectively, are attached to the bottom packaging material 34 in a straight line by the bottom seal portion 36 along the bottom, and the both sides The packaging material 35 is linearly bonded to the left and right side seal portions 37, and the left and right edges of the bottom packaging material 34 and the lower edge of the side packaging material 35 are bonded to each other. The lower portion of the material 35 is folded in accordance with the folding of the packaging material 34 at the bottom, and the intermediate seal portion 33 is formed so as to be orthogonal to the side seal portions 37 on both the left and right sides.

This type of microwave packaging bag 30 is filled with the contents from the opening on the upper side, and heat seals the portion indicated by the dotted line in FIG. 21 so as to close the opening to form the upper side sealing portion 38. By passing through such a filling process, the microwave packaging bag 30 has an upper side seal part 38 in addition to the side seal part 37 and the bottom seal part 36 on the left and right sides, and the upper side seal part 38 with scissors. Can be opened by forming an opening end straddling the left and right side seal portions 37 at a site inside the upper side seal portion 38. Then, the protruding piece P straddling the left and right side seal portions 37 is provided on the outer surface of either the front surface side or the back surface side at a position further inside than the portion serving as the opening end.

The microwave packaging bag 30 filled with the contents as described above is sold as it is or in another bag or paper box. Then, the upper side seal part 38 is cut and opened with scissors, and after adding seasonings and ingredients as necessary, from the base part of the protruding piece P inside the opening end, from the protruding piece P of the packaging bag When the upper part is folded back to the opposite side of the protruding piece P from the protruding piece P of the packaging bag , the folded state is maintained, so that it can be cooked in the microwave oven as it is.

After the food in the bag is cooked in this way, the contents above are taken out after returning the portion above the protruding piece P of the packaging bag to straighten the bag. Alternatively, the bag can be used as a container as it is. Even during this cooking, a path for steam is formed in a portion above the projecting piece P of the packaging bag before the internal pressure of the bag increases, and steam can escape through the gap. Therefore, the contents do not pop out and can be cooked safely. Further, if the internal pressure does not increase, the passage of steam is not formed, and the bag is filled with a certain amount of steam, so that it is also suitable for cooking that requires pressure or steamed cooking. Since the microwave packaging bag 30 is a gusseted bag, the microwave oven packaging bag 30 can be cooked in a standing state in a microwave oven, or can be in a standing state when used as a container.

  FIG. 22 shows another aspect of the microwave packaging bag 30 shown in FIG. This microwave oven packaging bag 30 is of a type that is sold only in a bag while being opened. And the usage method of this packaging bag 30 for microwave ovens is the same as that of the case of the packaging bag 20 for microwave ovens shown in FIG.12 and FIG.13. Thus, when it is set as the form which has a pleat (gusset) in a bottom part and both sides, since an opening can be greatly expanded as a rectangle or a square, there is an advantage that it is easy to fill the contents or to take out the contents. is there.

[Fourth Embodiment]
Next, a fourth embodiment of the present invention will be described based on the microwave packaging bag 10 shown in FIGS.

23 corresponds to FIG. 2, and FIG. 24 corresponds to FIG. 4. The microwave packaging bag 10 shown in FIG. 23 is located at a position corresponding to the protruding piece P of the packaging material 11, from the outside to the inside. An inwardly pushed ruled line a is provided that is recessed inward. The stamped rule a can be formed by embossing the packaging material 11 using a mold such as a mold or a roller.

Thus, by providing the ruled line a, the microwave packaging bag 10 filled with the contents is added with seasonings and foods as necessary after opening, and then the protruding piece as shown in FIG. When the portion above the projecting piece P of the packaging bag is folded back toward the portion below the projecting piece P of the packaging bag from the base portion of P to the opposite side of the projecting piece P, the projecting piece of the packaging bag In addition to suppressing the return (repulsion where the folded part tries to return to the original part) due to the protruding piece P, the part above P is easily held back by the action of the push ruler a.

25 corresponds to FIG. 2 and FIG. 26 corresponds to FIG. 4. The microwave packaging bag 10 shown in FIG. 25 is located at a position corresponding to the protruding piece P of the packaging material 11 from the outside to the inside. An inwardly pressed ruler a that is recessed inward is provided, and further, a stamped ruler b is also provided on the packaging material 12 on the side where the protruding piece P is present. This push ruled line b is provided so as to be along the root of the protruding piece P in an outward state that is recessed outward from the inside. As described above, when the ruled line b is also provided on the packaging material 12, it becomes easier to hold the folded state. Further, even when only the pressing rule b along the base of the protruding piece P is provided, the folded state can be easily maintained as compared with the case where no pressing rule is provided.

The ruled lines a and b for maintaining the folded state are particularly effective when steamed and cooked. In addition, the formation of the stamped lines a and b on the protruding piece is not limited to the microwave oven packaging bag 10 shown in FIGS. 1 and 2, and is similarly applied to the other microwave oven packaging bags described above. can do.

[Fifth Embodiment]
Next, a fifth embodiment of the present invention will be described based on a microwave packaging bag 20 shown in FIGS.

  FIG. 27 corresponds to FIG. 8, and the microwave packaging bag 20 shown in FIG. 27 is such that the intermediate seal portion 23 is not a straight belt, but has a deformation pattern as shown. That is, the intermediate seal portion 23 is formed in a gently curved shape so that the width gradually decreases from the central portion sealed to the base toward both sides, and overlaps with the side seal portions 24 on both the left and right sides with a small width. I have to. As a result, a triangular unsealed portion 23n connected to the inside is formed where the intermediate seal portion 23 and the left and right side seal portions 24 intersect.

The microwave packaging bag 20 is cut off from the opening notch 25 and opened. After adding seasonings and ingredients as necessary, the root portion of the protruding piece P is removed as shown in FIG. As a base point, when the portion above the protruding piece P of the packaging bag is folded back to the side opposite to the protruding piece P toward the portion below the protruding piece P of the packaging bag, the portion above the protruding piece P of the packaging bag Since the protruding piece P is present, the return (repulsion where the folded portion tries to return) is suppressed, and in the folded state, cooking can be performed in a microwave oven. And since the intermediate seal part 23 is made into the deformation pattern as shown in figure, the passage of a vapor | steam is formed in the part above the protrusion piece P of a packaging bag . Further, as shown by an arrow in FIG. 28, when the vicinity of the intersection of the intermediate seal portion 23 and the side seal portion 24 is picked and pushed in the direction opposite to the folded portion (from the near side to the far side in FIG. 28), The wrapping material is stretched and slightly warped to the side where there is no protruding piece P , and a lock is applied at the corner where the intermediate seal portion 23 and the side seal portions 24 on the left and right sides intersect, and the rebound of the folded portion ( (Floating) is suppressed, and the contents are prevented from leaking during a fall.

  Another embodiment of the microwave packaging bag 20 shown in FIG. 27 is shown in FIG. This microwave packaging bag 20 is a type sold in an open state. And the usage method of this packaging bag 30 for microwave ovens is the same as that of the packaging bag 30 for microwave ovens shown in FIG. 27 except putting meat and vegetables with a seasoning etc. from an upper opening.

[Other Embodiments]
As mentioned above, although the form for implementing this invention has been demonstrated in detail, the packaging bag for microwave ovens by this invention is not limited to said embodiment at all, In the range which does not deviate from the meaning of this invention. Of course, various modifications are possible.

  For example, in the packaging bag for microwave ovens of the first to fourth embodiments that is simply folded back with the root portion of the intermediate seal portion as the base point, the overlapping packaging material is extended to the root of the intermediate seal portion straddling the left and right side seal portions. Although it is formed by sealing, it may be formed by a seal pattern as illustrated in FIG.

FIG. 30 shows a modification of the seal pattern of the intermediate seal portion 13 based on the microwave packaging bag 10 shown in FIG. 1, and (a) straddles the left and right side seal portions 14. (B) is a pattern that seals across the left and right side seals 14 but seals only the vicinity of the center to the root, and the sides are sealed with the roots open. The pattern (c) is a pattern in which the sealing is performed across the left and right side seal portions 14, but only the root portion near the center is opened and both sides are sealed to the root. Thus, as long as at least a part of the root portion of the protruding piece P is sealed, the return is suppressed due to the protruding piece P when the bag is folded back. And since the place without a seal | sticker becomes a passage of steam, it is good to design the seal | sticker pattern of the protrusion piece P suitably according to the content to cook.

  Moreover, since it uses as a container after cooking, as shown in FIG.31 and FIG.32, you may attach the sleeve S for heat insulation to the trunk | drum of a bag.

  FIG.31 and FIG.32 has shown the microwave packaging bag 20 which attached the sleeve S for heat insulation to the microwave packaging bag 20 shown in FIG. This packaging bag 20 for microwave ovens uses a belt-like sheet having shape retaining properties such as paperboard, and pastes the overlapping portions at both ends of the sheet into a ring shape, and sets it on the body of the bag. It is attached by hot melt, adhesive, heat sealing or the like at the illustrated adhesive portion f.

  In this way, by winding the sleeve S around the body of the bag, the sleeve S exhibits a shape-retaining action, so that it can be used as it is as a container after cooking with a microwave oven. Further, when paperboard is used as the sheet, the sleeve S exhibits a heat insulating action and is easily held by hand.

[Packaging materials]
As a packaging material used for the microwave packaging bag of the present invention, a laminated film mainly composed of plastic is used, and in a simple configuration, a laminated film having a structure in which a sealant layer is laminated on a base film layer is used. However, depending on the contents filled in the bag, the handling conditions after filling, or the required performance such as water vapor and other gas barrier properties, light shielding properties, various mechanical strengths, etc., the base film layer and the sealant For example, a laminated film having a structure in which a water vapor or other gas barrier layer, a light shielding layer, a strength improving layer, or the like is laminated as an intermediate layer is used between the layers.

  The base film layer, water vapor or other gas barrier layer, light shielding layer, intermediate layer such as a strength improving layer, sealant layer, etc. may be formed as a single layer, but may be formed by laminating a plurality of layers. May be.

  In addition to the biaxially stretched film of polyester such as polyethylene terephthalate (PET) and polyethylene naphthalate, the base film layer is biaxially stretched of polyamide such as nylon 6, nylon 66, MXD6 (polymetaxylylene adipamide). A film, a biaxially stretched polypropylene film (OPP), etc. can be used conveniently.

  Examples of the gas barrier layer include films of saponified ethylene / vinyl acetate copolymer (EVOH), polyvinylidene chloride (PVDC), polyacrylonitrile (PAN), vapor deposition layers of silica and alumina, and PVDC coatings. Biaxially stretched nylon film (ON film) provided with a layer, polyethylene terephthalate (transparent deposited PET) provided with a vapor deposition layer such as silica, alumina, biaxially stretched polyethylene terephthalate film (PET film), biaxially stretched polypropylene film (OPP) Film) and the like can be used.

  As the strength improving layer, any one of the base films may be additionally laminated as appropriate, and a biaxially stretched high-density polyethylene film or the like may also be laminated as a moisture-proof layer.

  In addition, an easily tearable uniaxially stretched polypropylene film, a uniaxially stretched high-density polyethylene, an easily tearable biaxially stretched polyester film ("Emblet" PC (easy to tear in the MD direction), manufactured by Unitika Ltd.), etc. Are laminated so that the stretching direction coincides with the tearing direction at the time of opening the bag, the tearing can be facilitated and the directionality can be stabilized as the easy-opening means.

  A known dry lamination method or extrusion lamination method (sandwich lamination method) can be used for laminating the base film layer and an intermediate layer such as a gas barrier layer or a strength improving layer.

  For the sealant layer, in addition to low density polyethylene (LDPE) and linear low density polyethylene (LLDPE), ethylene / α-olefin copolymer, ethylene / vinyl acetate copolymer, ethylene / acrylic acid copolymer, ethylene -Acrylate ester copolymer-Polypropylene (transparent vapor deposition CPP) provided with vapor deposition layers, such as ionomer, polypropylene (CPP), silica, and alumina, or a copolymer thereof can be used.

  For the lamination of the sealant layer, the above resin can be formed into a film and laminated by a dry lamination method or an extrusion lamination method, or the above resin can be extruded and laminated. However, in the case where the content easily penetrates into the sealant layer, it is preferable to laminate by a dry lamination method.

  As a specific example of such a laminated film mainly composed of plastic, a packaging material having the following layer structure can be typically mentioned. The following 1) to 12) are laminated films by a dry lamination method, and each layer is bonded with an adhesive. Here, the packaging materials of the following 1) to 12) may be laminated by extrusion lamination of each layer through PE. In addition, the value in () shows the thickness of each layer.

1) PET (12 μm) / CPP (30 to 150 μm)
2) PET (12 μm) / LLDPE (30 to 150 μm)
3) ONY (15 μm) / CPP (30 to 150 μm)
4) ONY (15 μm) / LLDPE (30 to 150 μm)
5) Transparent vapor-deposited PET (12 μm) / CPP (30 to 150 μm)
6) Transparent vapor-deposited PET (12 μm) / LLDPE (30 to 150 μm)
7) PET (12 μm) / ONY (15 μm) / CPP (30-150 μm)
8) PET (12 μm) / ONY (15 μm) / LLDPE (30 to 150 μm)
9) PET (12 μm) / transparent vapor-deposited PET (12 μm) / LLDPE (30 to 150 μm)
10) PET (12 μm) / transparent vapor-deposited PET (12 μm) / CPP (30 to 150 μm)
11) OPP (20 μm) / CPP (30 to 150 μm)
12) OPP (20 μm) / LLDPE (30 to 150 μm)

DESCRIPTION OF SYMBOLS 10 Microwave packaging bag 11, 11, 12 Packaging material 13, 13A Middle seal part 14 Side seal part 15 Opening notch 16, 16A Upper side seal part 20 Microwave packaging bag 21, 21, A, 21B, 21C, 22 Packaging material 23, 23A Intermediate seal portion 23n Unsealed portion 24 Side seal portion 25 Opening notch 26 Bottom seal portion 27 Upper side seal portion 28 Notch 30 Packaging bag for microwave oven 31, 32A, 32B Packaging material 33 Intermediate sealing portion 34, 35 Packaging material 36 Bottom seal part 37 Side seal part 38 Top seal part
P Projection piece S Sleeve a, b Press ruler f Adhesive part

Claims (2)

Becomes a sealant layer from laminated packaging material on the inner surface, has a side seal portion to at least the left and right both sides, of a type microwave packaging bag for heating cooking state of forming an opening, the front side or back side Protruding pieces straddling the left and right side seal portions are provided on either one of the outer surfaces, the projecting pieces are provided with an intermediate seal portion straddling the side seal portions, and the projecting pieces serve as a steaming means. A packaging bag for a microwave oven characterized by not having it.   The microwave packaging bag according to claim 1, wherein the intermediate seal portion is formed so as to include at least a part of a root portion of the protruding piece.

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