JP5379504B2 - Food packaging bag for microwave cooking. - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a food packaging bag in which all the food content and the seasoning permeate by heating a bag for microwave oven cooking in which the food content and the seasoning liquid are separated and stored, and to provide a method for manufacturing the bag in which the internal welding part can be welded under the same condition as welding of the outer periphery. <P>SOLUTION: In the food packaging bag for the microwave oven cooking, leaving an opening part on one corner of a horizontal welding part of the outer periphery, the circumference is appropriately welded by vertical/horizontal welding parts, and a food material storing part and a seasoning liquid storing part are separated by a vertical direction weak welding part. On the inside of the horizontal welding part of the outer periphery in which the opening part exists, at least one internal horizontal welding part exists by leaving a duct width. The food material storing part and the seasoning liquid storing part are separated by the internal vertical welding part by placing an easily releasable ribbon laminated with an oriented polyamide between them. All the welding parts are welded under an appropriate pressure and at an appropriate temperature. A site which is on the food material storing part side of the internal horizontal welding part, overlaps with the easily releasable ribbon, and comes into contact with the internal vertical welding part is made to be a jetting hole forming part, and the length of the jetting hole forming part is 2 to 10 mm. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention separates the food material cut for cooking and the seasoning liquid prepared for cooking this food material, stores them in one bag, and heats them for a predetermined time in a microwave oven, thereby providing a conventional method. The present invention relates to a food packaging bag for cooking with a microwave oven that can cook cooked dishes and dishes that are comparable to those of a small number of people at any time in a very short time.

  The present inventors disclosed a food packaging bag for microwave cooking as shown in Patent Document 1 as follows. That is, as shown in FIG. 1, the bag having the two outer peripheral vertical fusion parts 1 was separated into the food storage part 3 and the seasoning liquid storage part 4 by the internal vertical weak fusion line 2. An opening 6 is provided in one outer circumferential fusion portion 5, and an inner transverse fusion portion 8 having an opening 6 a at a position away from the opening 6 via a duct 7 inside the outer circumferential fusion portion 5. , And a transverse weak fusion part 9 is provided inward of the interior transverse fusion part 8.

  The side facing the outer circumferential fusion part 5 is open, the food is stored in the food storage part 3, the seasoning liquid is stored in the seasoning liquid storage part 4, and the part indicated by the dotted line is fused and distributed and stored. Provide. With this technology, it has become possible to separate and store the ingredients and the seasoning liquid. In use, the food packaging bag is placed in a microwave oven and heated for a predetermined time. The vertical weakly fused portion 2 is peeled off by the pressure of water vapor generated from the food and seasoning liquid by heating, and the seasoning liquid moves as indicated by the one-dot chain line. When the internal vertical weakly fused portion 2 is peeled off, the seasoning liquid comes into contact with the food and can be seasoned. When the horizontal weakly fused portion 9 is peeled off, the water vapor passes through the duct 7 from the opening 6a and is released from the opening 6 to continue cooking.

  When cooking is completed, the temperature of the water vapor decreases, and the generated water droplets adhere to the surface of the film constituting the duct 7, and the front and back films adhere to close the bag mouth. Along with the decrease in the temperature of the food and the condensation of the water vapor, the inside of the bag is decompressed and contracts, and the cooked food can be taken out without overflowing the seasoning liquid.

  In manufacturing the bag of Patent Document 1, the heater temperature for forming the inner vertical weak fusion part 2 is set lower than the heater temperature for fusing the outer side vertical fusion part 1. The bag making machine itself is equipped with an automatic temperature control mechanism, but an error of about 2 to 3 ° C is inevitable. At the same time, it is necessary to set the heater temperature for fusing the weak welded portion 9 lower than the temperature for forming the outer peripheral fusing portion 5 and the inner fusing portion 8.

  The present inventors tried to control the temperature of the bag making machine, but it was difficult to eliminate the accident that the outer peripheral fusion part peeled off before the transverse weak fusion part 9 peeled off and the bag was broken. . Since this kind of cooking bag is used in each household, even if it is one in a hundred and one in a thousand, such an accident must not occur. Unexpected bag breaking accidents are not only dangerous, but also troublesome microwave cleaning. The weak fusion means that the fusion strength is required to be surely peeled off prior to other fusion parts due to an increase in pressure while being hermetically fused. I realized that it was very difficult to manage such fusion strength.

  Patent Document 2 discloses a technique that uses an easily peelable film to facilitate opening of a plastic container. Patent Document 3 discloses an easily peelable film and a container or bag that can be easily opened using this film. However, providing an easily peelable film on the entire inner surface of the bag is technically and expensive, and a method of sandwiching in a ribbon shape is preferable. The method of sandwiching the ribbon-like easily peelable film in the same length direction as the film flow can simultaneously supply the film and the easily peelable ribbon, and sandwich the ribbon-like easily peelable film in the horizontal direction perpendicular to the film flow. Work is easier than wearing.

  In the food packaging bag of the present invention, the vertical fusion part and the horizontal fusion part intersect inside the bag, and it is necessary to sandwich an easily peelable film between both the internal vertical fusion part and the internal transverse fusion part. There is. In the method disclosed in Patent Document 1, even if an easily peelable film is used without performing delicate temperature control for each difficult heat sealer, it is manufactured while sandwiching a ribbon-like easily peelable film in the horizontal direction. It was still difficult to bag.

JP 2007-217044 A JP-A-10-203561 JP 2001-131307 A

The present invention takes a lot of time and effort by separating the ingredients cut into the shape just before cooking from the seasoning liquid, storing them in sealed bags for distribution and storage, and heating them in a microwave oven for a predetermined time when necessary. It also provides food packaging bags that can provide warm and fresh dishes that are comparable to cooked dishes.
Furthermore, the present invention provides a cooking bag obtained by an appropriate fusing process under the same conditions without performing weak fusing that is difficult to control temperature.

  The proper fusion in the present invention is a fusion that is securely bonded so as not to be peeled off even when an external force is applied during the process of storage and distribution in fusing the film and making a bag, and a microwave oven. It can withstand internal water vapor pressure during heating. The appropriate temperature is a temperature for proper fusion. Although this differs depending on the film to be used, those skilled in the art who handle the film can appropriately select and fuse the film under the best conditions.

  In the sealing bag for cooking in which the internal vertical weak fusion part and the internal horizontal weak fusion part intersect, the present invention is a case where an easily peelable ribbon is sandwiched and fused only to the internal vertical weak fusion part It has been found that a part overlapping the easily peelable ribbon is inevitably generated also in the inner side fusion part. As a result, the portion where the internal transverse fusion portion is weakly fused is short, but this is sufficient as the ejection hole for discharging the internally generated water vapor to the outside. In the case of making the internal vertical fusion part to be weakly fused while properly fusing, it is necessary to make the width of the easily peelable ribbon larger than the width of the internal vertical fusion part. Since there is a possibility that the relative position between the internal vertical fusion sealer and the easily peelable ribbon may slightly fluctuate, a free easily peelable ribbon exists around the internal vertically fused portion as a safety measure.

  When the internal transverse fusion part is formed by proper fusion, only the part crossing the easily peelable ribbon is weakly fused. The inner side melt fusion part from the food material storage side edge part of the internal vertical fusion part to the part that does not overlap with the easy peel ribbon at the part overlapping with the easy peelable ribbon is defined as the ejection hole forming part. By setting the length of the ejection hole forming portion to (a) and adjusting the length, an ideal microwave cooking bag can be provided.

  The present invention eliminates the difficulty of delicate temperature control of the heat sealer for providing weak fusion parts on both the vertical and horizontal sides, and simplifies bag-making management because all fusion parts can be performed under the same appropriate conditions. It became easy to work. Furthermore, there was no variation in the quality of the bag of the product, and the risk of breaking the bag without peeling off the part to be peeled first in the microwave oven was solved. Since it has been found that the portion where the water vapor ejection hole is open is the periphery of the internal vertical fusion portion, the opening provided in the outer side horizontal fusion portion is preferably the portion farthest from the internal vertical fusion portion, A duct having a sufficient length can be formed at a portion sandwiched between the outer peripheral side fusion portion and the inner side fusion portion.

  After the heating is finished, the temperature decreases and the water vapor returns to water, and the inside is decompressed. At this time, the moisture adhering to the film in the duct brought the front and back films into close contact with each other, keeping the inside of the bag at a high pressure, and eliminating the backflow of air. As a result, all of the seasoning liquid remaining in the seasoning liquid storage portion is supplied to the foodstuff, and uneven seasoning and waste of the seasoning liquid are eliminated.

FIG. 1 is a plan view of a food packaging bag for microwave cooking according to the prior art. FIG. 2 is a plan view of the food packaging for microwave oven cooking according to the present invention.

  The packaging bag according to the present invention is a sealed packaging bag in which the outer periphery of the vertical and horizontal sides of the bag is appropriately fused by the outer peripheral vertical fusion part 1 and the outer peripheral lateral fusion part 5 shown in FIG. As the film material, polyester, polyamide, polypropylene, or the like can be used, and a film having at least an inner surface heat-sealable is used. Vertical means the film flow direction, and horizontal means the direction across the film flow. Since it is a sealed bag, naturally the periphery of the bag is properly fused to such an extent that the bag is not broken by heating in a microwave oven.

As shown in FIG. 2, the bag of the present invention further has one internal vertical fusion part 12 and at least one internal horizontal fusion part 19 inside the bag. However, in the present invention, the internal vertical fusion portion 12 and the internal horizontal fusion portion 19 perform proper fusion in the same manner as the outer periphery.
That is, the internal vertical fusion part 12 sandwiches the easily peelable ribbon 11 between the front and back films, and the central part of the internal vertical fusion part 12 is subjected to vertical fusion under the same conditions as the outer peripheral vertical fusion part 1. Form. Although the internal vertical fusion part 12 has been properly fused, an easily peelable ribbon is interposed, so that it is substantially weakly fused.

In FIG. 1, the transverse weakly fused portion 9 is provided in the innermost portion. However, in the present invention, vertical / horizontal weakly fused portion is not performed, and at least one internal transversely fused portion 19 is provided. Similarly to the internal vertical fusion part, the internal horizontal fusion part is appropriately fused by the same temperature and pressure as the outer circumferential fusion part. However, since the easily peelable ribbon 11 is interposed in the portion overlapping with the easily peelable ribbon 11 sandwiched between the internal vertical fused portions 12, the same result as that when weakly fused locally is obtained.

  The first object of the present invention is that the internal vertical fusion part 12 is peeled off by microwave heating, and the boiled seasoning liquid penetrates into the food that has already been heated through the communication between the food storage part and the seasoning liquid storage part. It is. The second purpose is to safely release water vapor generated when heating further proceeds to the outside. The third purpose is that the duct 7 is quickly closed after the heating is finished, and the inside is in a highly decompressed state. In the prior art of FIG. 1, the lateral weakly fused portion 9 is provided, and the opening 6 a that is a missing portion of the internal laterally fused portion 8 provided on the outer side and the aperture 6 is provided on the outer circumferential laterally fused portion. It is solved by.

  In the present invention, the easily peelable ribbon 11 is sandwiched between the internal vertical fused portions. The part which overlaps with the easily peelable ribbon 11 of a horizontal melt | fusion part is substantially weak meltability. In FIG. 2, two internal transverse fusion parts 19 are provided, but one is sufficient. A portion of the internal transverse fusion part 19 that overlaps the easily peelable ribbon 11 and is close to the food shrinkage part that circumscribes the internal vertical fusion part is an ejection hole forming part 13. The length of the ejection hole forming portion 13 is a width a as shown in FIG. The pressure of water vapor generated from the cooking bag concentrates on the ejection hole forming portion 13 communicating with the opening 6 among the easily peelable ribbons that are substantially weakly fused, thereby opening the ejection holes. The water vapor released from the ejection holes passes through the duct 7 formed between the inner side fusion part 19 and the outer side side fusion part 5, and is emitted from the opening 6.

In the present invention, it is wide enough to release water vapor generated by the ejection holes generated by peeling off the ejection hole forming portion 13, and the seasoning liquid does not overflow after heating by the microwave oven. It needs to be.
The width a of the ejection hole forming portion 13 is 2 to 10 mm, preferably 3 to 9 mm. If it is less than 2 mm, there is a possibility that a part where the internal vertical fusion part 2 does not overlap the easily peelable ribbon 11 is generated, and if it exceeds 10 mm, the easily peelable ribbon is wasted. When the internal pressure of the cooking bag increases, it is the ejection hole forming portion 13 that first peels off, but other substantially weakly fused parts peel off as the cooking proceeds thereafter.

  The easily peelable ribbon is obtained by purchasing a commercially available easily peelable film and cutting the ribbon into a predetermined length. By heating, the easily peelable ribbon 11 may be broken and the fragments may be mixed with food. In order to avoid such a phenomenon, it is solved by laminating a tough film such as stretched polyamide, stretched polyester or stretched polypropylene on an easily peelable ribbon. Furthermore, it is preferable to laminate a heat-fusible film such as linear low-density polyethylene to improve the fusing property with the surface film.

The packaging bag of the present invention is supplied in a state in which one of the laterally fused portions is opened. The process is completed by charging food from the wide opening, injecting seasoning liquid from the narrow opening, and fusing the opening appropriately in the horizontal direction.
In FIG. 2, the two internal transverse welds 19 are provided, but one is sufficient. In some cases, three or more can be provided. In the case of providing two or more internal horizontal fusion parts, the internal horizontal fusion part and the internal horizontal fusion part need to maintain an interval of 5 to 10 mm.

  When a plurality of internal horizontal fusion parts are provided, the innermost ejection hole forming part 13 is first peeled off with a light sound, and the next ejection hole forming part 13 is broken, resulting in a rhythmic Make a sound and peel off. The fusion width of the internal fusion part is 3 to 7 mm, preferably 4 to 6 mm, for both vertical and horizontal. If it is less than 3 mm, there is a risk of peeling in the process of filling, distributing, and storing the ingredients, and if it exceeds 7 mm, it becomes difficult to peel even if an easily peelable ribbon is interposed.

The width of the duct is 13 to 25 mm, preferably 15 to 20 mm. If it is less than 13 mm, the cross-sectional shape of the duct is close to a circle when water vapor is spouted out. If the duct swells until it approaches a circle, the front and back films forming the duct hardly adhere to each other when heating is finished, the inside tends to be in a vacuum state, and the seasoning liquid may flow out. If it exceeds 25 mm, the film is wasted, and it is too wide to cause a vacuum leak in the duct.
The height of the swollen duct at the time of the maximum jet of water vapor is 35 to 60% of the duct width, that is, if the width of the duct 7 is 15 mm, the height of the duct immediately before the end of cooking is 5 to 9 mm in advance. Adjust the duct width.

  An opening 6 is provided in a portion of the outer side horizontal fusion part away from the inner vertical fusion part. There is no problem even if it is used for distribution with the opening 6 opened. Since the food packaging bag is fused once even if there is a portion sandwiching an easily peelable ribbon, there is no risk of contamination. However, if it is not preferable that the sealing bag has an opening itself, the sealing bag is sealed without being provided with an opening and used for distribution. In this case, it is necessary to directly and indirectly describe what should be opened first when heating in a microwave oven. As shown in FIG. 2, the portion 20 to be cut prior to microwave heating can be indicated by a broken line. The display of the part to be opened is not limited to the method shown in FIG. 2, and any method can be adopted as long as it allows the consumer to provide an appropriate opening.

A food packaging bag of the present invention having a length of 26 cm and a width of 21 cm was produced. The outer side vertical fusion part was 10 mm wide, and the internal vertical fusion part 12 was formed by sandwiching the easily peelable ribbon 11 having a width of 18 mm at the site where the bag width was separated into 15: 6. The fusion width was 3 mm. The wide side was the food storage part 3 and the narrow side was the seasoning liquid storage part 4. A 2 cm opening 6 was left at a portion of the food storage unit 3 that was in contact with the outer peripheral vertical fusion part 1 to form one outer peripheral horizontal fusion part 5. The fusion width was 6 mm. An inner side fusion part 19 having a fusion width of 3 mm was formed inside the outer circumference side fusion part 5 while maintaining a duct width of 15 mm. An inner inner side fusion part 19 ′ was provided further inwardly of the inner side fusion part 19 with a space of 5 mm.

  A duct 7 having a width of 15 mm was formed between the inner side fusion part 19 and the outer side side fusion part 5. The width of the easily peelable ribbon 11 sandwiched between the internal vertical fusion part 12 is 18 mm, and the internal vertical fusion part is provided with a width of 3 mm at the center of the easy peelable ribbon. The length of the ejection hole forming part 13 was 7 to 8 mm.

  The opening on the side of the obtained microwave cooking food packaging bag on which the internal transverse fusion part is not provided is divided into two by the internal vertical fusion part 12. Ingredients are charged from the wide side, seasoning liquid is injected from the narrow side, degassed in the vacuum chamber, and at the same time the bag mouth is properly fused. For fusion, two 4 mm wide fusion wires were provided with a spacing of 2 mm. In this food packaging bag, the opening 6 is provided in the outer side horizontal fusion part 5, but the food is contaminated in the distribution process because it is fused by the internal vertical fusion part 12 and the internal horizontal fusion part 19. There is no fear.

  As ingredients, 120 g of potato cut to 15 mm per side, 50 g of onion cut to 10 mm per side, 15 g of carrot cut to 7 mm per side and 25 g of bacon cut to 10 mm per side were used. Each material was cut in a dice shape. 40 ml of seasoning liquid consisting of water, beef consomme, soy sauce and salt was used.

In some cases, the outer circumferential side fusion-bonding portion 5 may be fused without leaving an opening. In this case, as indicated by the portion 20 to be cut in FIG. 2, the portion to be cut prior to microwave heating may be indirectly indicated. Furthermore, it can be explained that heating should be performed after the opening is cut in a bag, other packaging materials, instructions, or the like.
Furthermore, the opening 6 can be closed with another adhesive label or the like, and a description that the label is peeled off prior to heating can be given. Or you may give the easy tear process which can be cut | disconnected by the force of a finger | toe at the site | part 20 which should be cut | disconnected. For example, there is a method of providing a continuous slit in the film substrate.

  In this example, an easy peel film IMX (manufactured by Mitsubishi Chemical Corporation) was used as the easily peelable ribbon. An easy peel film IMX having a thickness of 30 μm was laminated on the stretched polyamide layer of a film obtained by laminating a linear low adhesion polyethylene having a thickness of 25 μm on a stretched polyamide having a thickness of 15 μm. The film was cut into a ribbon having a length of 18 mm and fused while being supplied to a portion to be an internal vertical fusion portion at the time of fusion in the vertical direction. When an easily peelable film is used as a single layer, the easily peelable film may be broken during cooking and mixed with a cooked food. However, the problem has been solved by laminating a polyamide layer or a polyester layer. Furthermore, the adhesion to the bag film was improved by laminating linear low density polyethylene.

  It confirmed that the opening part 6 of the obtained food packaging bag for microwave cooking was opening, and it heated for 5 minutes with the microwave oven of the high frequency output 600W. As the heating progresses, the entire cooking bag swells and swells in a cross-sectional shape with the internal vertical fusion part 12 as a boundary, and the internal vertical fusion part 12 peels off with the sound of a bonbon and the seasoning liquid penetrates into the food. It was. As the heating further proceeds, the ejection hole forming part 13 provided in the inner side fusion part 19 'is peeled off, and then the ejection hole forming part 13 provided in the inner side fusion part 19 is broken, and a light continuous sound such as a pong is generated. Occurred and the orifice was opened.

  Water vapor generated from the inside of the cooking bag passed through the ejection holes, continued to be discharged from the opening 6 through the duct formed by the front and back films. When the predetermined time has elapsed and the heating is completed, the water vapor is cooled and returned to the water, and the bag is depressurized. At this time, the moisture generated by the condensation of water vapor in the duct 7 joins the front and back films constituting the cooking bag, obstructs the inflow of air from the outside through the duct, At reduced pressure. Since the inside of the cooking bag is kept at a reduced pressure, all of the seasoning liquid remaining in the food storage part 3 is transferred to the food storage part because it is attached to the seasoning liquid storage part 4 or in the blind spot. As a result, the optimum amount of seasoning liquid was supplied to the food without excess or deficiency. In addition, the seasoning liquid did not overflow from the opening 6 upon removal.

  During heating in the microwave oven, it is not preferable that the cross section of the duct expands to a shape close to a perfect circle. In such a case, it is difficult for the duct to become flat after heating, and it takes time for the front and back films forming the duct to adhere to each other, or they do not adhere firmly, and the interior is in a highly decompressed state. It ’s hard to keep. When the duct width was 15 mm as in this example, the swelling of the duct 7 was about 7 mm. The preferable duct width varies depending on the dish, and is appropriately determined by experiment.

After cooking in the microwave, the resulting dish was warm and tasted well, and the taste was inferior to a dish that the housewife cooked with all the steps, starting with the preparation of ingredients.
When the packaging bag after cooking was seen, most of the periphery where the internal vertical fusion part and the internal transverse fusion part crossed was peeled off.

Reference numeral 1 denotes an outer peripheral vertical fusion part 2, an inner vertical weak fusion part 3, a food storage part 4, a seasoning liquid storage part 5, an outer peripheral horizontal fusion part 6, an opening 7, a duct 8, The internal transverse fusion part 9 is the transverse weak fusion part 11, the easily peelable ribbon 12, the internal vertical fusion part 13 is the ejection hole forming part 19, and the internal transverse fusion part 20 is the part to be cut.

Claims (7)

A food packaging bag for microwave oven cooking, in which three sides are properly fused by the vertical and horizontal fusion parts, the food storage part and the seasoning liquid storage part are separated by the internal vertical fusion part, and further have an internal horizontal fusion part. In
The internal horizontal fusion part is formed inside the outer side horizontal fusion part, leaving a duct width, the number of internal horizontal fusion parts is one or more, and the food storage part and the seasoning liquid storage part are Separated by an internal vertical fusion part interposing an easy peelable ribbon, the internal horizontal fusion part intersects the internal vertical fusion part at the site where the easy peelable ribbon exists in the internal vertical fusion part. The part that is on the food storage part side of the inner side fusion part, overlaps the easily peelable ribbon, and is in contact with the inner vertical fusion part is the ejection hole forming part, and all the fusion parts are fused at an appropriate temperature. At least a portion that is away from the inner vertical fusion portion of the outer circumferential fusion portion and that can form a sufficiently long duct between the ejection holes when cooking in a microwave oven. A microwave oven characterized by a structure that becomes an opening when cooking in a microwave oven Management for food packaging bags. The food packaging bag for microwave oven cooking according to claim 1, wherein an opening is provided at one corner of the outer peripheral horizontal fusion part. The food packaging bag for microwave cooking according to claim 1, wherein a portion to be opened in use is displayed directly or indirectly at one corner of the outer circumferential fusion portion. The food packaging for microwave cooking according to any one of claims 1 to 3 , wherein the easily peelable ribbon is made of a film in which stretched polyamide and linear low density polyethylene are laminated on an easily peelable film. bag. Number of internal horizontal fused portion is 2 or more, the microwave oven according to any one of claims 1 to 4, characterized that you have the internal lateral fused portion is provided apart 5 to 10mm from one another Food packaging bag for cooking. Microwave cooking bulge verge ducts microwave heating ends is described in any one of claims 1 to 5, characterized in width der Rukoto the duct such that 35% to 60% of the duct width For food packaging bags. The food packaging bag for microwave oven cooking according to any one of claims 1 to 6, wherein the width of the ejection hole forming portion is 2 to 10 mm .