JP3987361B2 - Laminate film, bag, and lid - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a laminate film, and a bag body and a lid using the laminate film, and in particular, when the pressure on one side of the laminate film is considerably higher than the pressure on the other side, The present invention relates to a laminate film, a bag body, and a lid body that can be ventilated to the side, and when there is not much difference between the air pressure on one side and the air pressure on the other side, the air cannot be ventilated on either side.
[0002]
[Prior art]
A predetermined amount of food such as coffee beans may be enclosed in a bag made of a resin film or the like at a store and sold in a bag unit. Coffee beans easily generate carbon dioxide, and if the gas accumulates too much in the bag, the bag bursts. For this reason, the bag body for enclosing the coffee beans is provided with a so-called “navel” for discharging the gas accumulated inside to the outside of the bag body.
[0003]
More specifically, the navel is made of a valve, and the navel is manufactured separately from the bag body made of a resin film constituting the bag body and attached to the bag body. In the navel, when the air pressure inside the bag body is considerably higher than the air pressure outside, the air can be vented from the inside to the outside. When the air pressure inside the bag body is not so high as compared to the air pressure outside, the air cannot pass through. Moreover, it cannot permeate from the outside to the inside, and the hygiene management of the coffee beans as the contents is performed.
[0004]
Moreover, when warming frozen food etc. or disinfecting tableware etc. with a microwave oven, the bag body for microwave ovens which consists of resin films may be used. The microwave oven bag is formed with an opening for containing frozen food and tableware, and the opening is provided with a zipper that allows the opening to be opened and closed. When the contents are put in a bag for a microwave oven and placed in a microwave oven, the opening is closed by a zipper. Therefore, the contents can be prevented from leaking from the bag body by heating.
[0005]
Furthermore, foods such as oden sold at convenience stores are packed in disposable containers at the store according to customer orders, and the opening at the top of the container is closed with a lid and sold. The customer takes this home. In winter, the outside air temperature is particularly low and the food cools before returning home, so after the customer has come home, remove the lid from the container, transfer the food to a container that can be placed in a microwave oven, and wrap the container with a wrap. Cover the opening to warm it up in the microwave.
[0006]
[Problems to be solved by the invention]
However, in the conventional bag body, as described above, since the valve is manufactured separately from the resin film constituting the bag body and attached to the resin sheet, it takes cost to manufacture the valve itself, A process of attaching the valve to the resin film is required.
[0007]
In the case of a bag for a microwave oven, a so-called navel is not particularly provided, and the inside and outside of the bag cannot be vented. Sometimes inflated and broke.
[0008]
In addition, customers who have purchased food want to eat it with a microwave oven immediately after returning home, but if a container filled with food at a convenience store is put directly into the range, the container and lid will burst, As mentioned above, it was necessary to go through the troublesome task of transferring food to another container and wrapping it before putting it on the range.
[0009]
Therefore, the present invention permits a laminate film and bag that allow air to be passed from one side to the other side only when the pressure on one side is higher than the pressure on the other side, and that is easy to manufacture at low cost. The object is to provide a body and a lid.
[0010]
[Means for Solving the Problems]
In order to achieve the above object, the present invention provides an outer layer film having gas barrier properties, an inner layer film having gas barrier properties, and the outer layer film and the inner layer film provided between the outer layer film and the inner layer film. In the laminate film having a three-layer structure composed of an adhesive layer that adheres to the outer layer film, the outer layer film has an outer layer film non-adhesive portion that directly faces the inner layer film without the adhesive layer interposed therebetween, and the outer layer film is not adhered. Part of the part is formed with an outer layer roughened part consisting of minute through-holes and recesses, and a part of the inner layer film that faces the non-adhered part of the outer layer is an inner non-adhered part of the film. The inner layer film non-adhered part is formed with an inner layer roughened part consisting of minute through-holes and recesses, and the outer layer roughened part is a part of the inner layer non-adhered part. Coarse It faces the portion other than the processing unit, and, the inner layer roughened portion provide a laminate film which faces the outer layer film a portion outer layer rough surface portion other than the working portion of the non-adhesive portion.
[0011]
The present invention also provides an outer layer film having a gas barrier property, an inner layer film having a gas barrier property, and an adhesive layer provided between the outer layer film and the inner layer film to adhere the outer layer film and the inner layer film. And the outer layer film has an outer layer non-adhered portion directly facing the inner layer film without the adhesive layer interposed therebetween, and the outer layer film non-adhered Part of the part is formed with an outer layer roughened part consisting of minute through-holes and recesses, and a part of the inner layer film that faces the non-adhered part of the outer layer is an inner non-adhered part of the film. The inner layer film non-adhered part is formed with an inner layer roughened part consisting of minute through-holes and recesses, and the outer layer roughened part is a part of the inner layer non-adhered part. Coarse The inner layer roughened surface portion is a part of the outer layer non-adhesive portion, and is opposed to a portion other than the outer surface roughened portion, and is degassed by both non-contact portions. A bag body is provided.
[0012]
The present invention also provides an outer layer film having a gas barrier property, an inner layer film having a gas barrier property, and an adhesive layer provided between the outer layer film and the inner layer film to adhere the outer layer film and the inner layer film. And a bag body having an opening, and the opening provided around the opening so that the opening can be opened and closed. When the opening is closed, the opening In the bag for a microwave oven having a zipper that prevents the inside and outside of the bag body from venting at the position of the outer layer film, the outer layer film directly faces the inner layer film without interposing the adhesive layer. A part of the outer layer film non-adhered part is formed with an outer layer roughened part consisting of minute through-holes and recesses, and is a part of the inner layer film and is opposed to the outer layer film non-adhered part. The inner layer film non-adhered part is formed on the inner layer film non-adhered part, and an inner layer rough surface processed part consisting of minute through-holes and recesses is formed in a part of the inner layer film non-adhered part. It is a part of an adhesive part and faces a part other than the inner layer roughened part, and the inner layer roughened part is a part of the outer layer non-adhered part and other than the outer layer roughened part. A microwave oven bag is provided in which a gas venting portion is provided by both non-contact portions facing the portion.
[0013]
The present invention also provides an outer layer film having a gas barrier property, an inner layer film having a gas barrier property, and an adhesive layer provided between the outer layer film and the inner layer film to adhere the outer layer film and the inner layer film. In the lid for sealing the opening of the container having an opening formed at the upper end, the outer film is directly connected to the inner film without the adhesive layer. The outer layer film non-adhering part is opposed to the outer layer film non-adhering part, and a part of the outer layer film non-adhering part is formed with an outer layer rough surface processing part consisting of a minute through-hole and a concave part, The portion facing the non-adhesive portion of the outer layer film constitutes the non-adhesive portion of the inner layer film, and a portion of the inner non-adhesive portion of the inner layer film is formed with an inner layer rough surface processed portion consisting of minute through holes and concave portions, and the outer layer rough surface processing Is a part of the inner layer film non-adhered portion and is opposed to a portion other than the inner layer rough surface processed portion, and the inner layer rough surface processed portion is a part of the outer layer film non-adhered portion and the outer layer rough surface processed portion. A lid body is provided in which a gas venting portion is provided by both non-contact portions facing a portion other than the surface processed portion.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
A bag 1 according to an embodiment of the present invention will be described with reference to FIGS. As shown in FIG. 1, the appearance of the bag 1 has a shape that swells in a substantially cylindrical shape because a favorite food that easily generates gas such as coffee beans is enclosed therein. The bag body 1 includes a bag body 11 made of a single resin laminate film. As shown in FIG. 1, the laminated film is folded at both the left and right ends, and the ends of the folded portions are heat-sealed to each other on the back surface of the bag body 1 to form a palm portion (not shown). The laminate film is folded back inward in the radial direction of the substantially cylindrical bag body 11 at the upper and lower ends in FIG. 1 and heat-sealed to each other, so that the upper and lower ends of the substantially cylindrical bag body 11 are It is blocking. The laminated film constituting the bag body 11 is a three-layer structure in which a polyester layer having a thickness of 9 μm and a high-density (HD) polyethylene layer having a thickness of 20 μm are bonded and bonded together by an adhesive layer 11C (FIG. 3). It has a structure. The polyester layer forms the outer layer 11A, and the high-density (HD) polyethylene layer forms the inner layer 11B, each having gas barrier properties.
[0015]
A degassing part 11 </ b> D is provided at a position substantially in the middle of the side surface of the bag body 11 that is a part of the laminate film. The gas vent part 11D is configured by a non-adhesive part between the outer layer 11A and the inner layer 11B, and the outer shape is rectangular as shown in FIG. The outer layer 11A and the inner layer 11B in the gas vent part 11D form an outer layer film non-adhering part 11E and an inner layer film non-adhering part 11F, respectively. In the gas vent part 11D, the outer layer 11A and the inner layer 11B are not bonded, and can be separated from each other. An outer layer roughened surface portion 11G made of a minute through hole or a concave portion is formed in a rectangular shape at a substantially central position of the outer layer 11A forming the gas vent portion 11D. In addition, an inner layer roughened surface portion 11H including minute through holes and recesses is also formed in the vicinity of two short sides of the inner layer 11B forming the rectangular gas vent portion 11D. The inner layer roughened surface portion 11H is formed in a strip shape parallel to the short side of the gas vent portion 11D. The inner layer roughened surface portion 11H and the outer layer roughened surface portion 11G are formed by pressing the inner layer 11B and the outer layer 11A with rollers each provided with a protrusion such as sandpaper. The inner layer roughened surface processed portion 11H and the outer layer roughened surface processed portion 11G are not opposed to each other, and the outer layer roughened surface processed portion 11G is a part of the inner layer non-bonded portion 11F and is located on a portion other than the inner layer roughened surface processed portion 11H. The inner layer roughened surface portion 11H is a part of the outer layer non-bonded portion 11E and is opposed to a portion other than the outer layer roughened surface portion 11G. The outer layer roughened surface portion 11G and the inner layer roughened surface portion 11H have no gas barrier properties and can be ventilated.
[0016]
When gas is generated from the food enclosed in the bag body 11 and the air pressure in the bag body 11 becomes considerably higher than the external pressure, the bag body 11 is inflated, and the gas in the bag body 11 is expanded. Flows out from the inner surface roughened portion 11H. The outflowing gas enters between the outer film non-adhering part 11E and the inner film non-adhering part 11F, and the outer film non-adhering part 11E and the inner film non-adhering part 11F are separated from each other as shown in FIG. It becomes. The gas that has entered between the outer film non-adhering portion 11E and the inner film non-adhering portion 11F flows out of the bag body 11 from the outer rough surface processed portion 11G. When the gas inside the bag body 11 is discharged to some extent, the air pressure inside the bag body 11 decreases, and the difference between the external pressure and the internal pressure becomes small. At this time, the inner layer non-bonded portion 11F comes into contact with the outer layer roughened surface portion 11G, and the outer layer roughened surface processed portion 11G is closed by the inner layer film bonded portion, so that the outer layer roughened surface processed portion 11G has air permeability. It is inhibited by the film non-adhesion part 11F. Similarly, the outer layer film non-bonded portion 11E comes into contact with the inner layer rough surface processed portion 11H, and the inner layer rough surface processed portion 11H is blocked by the outer layer film bonded portion, and the air permeability of the inner layer rough surface processed portion 11H is increased by the outer layer. It is inhibited by the film non-adhesive part 11E. As a result, the air permeability in the gas vent portion 11D is lost, and the gas inside the bag body 11 cannot go out. Thereafter, when gas is again generated from the coffee beans inside the bag body 11 and the difference between the atmospheric pressure and the atmospheric pressure inside the bag body 11 becomes large, the gas vent 11D is again in the state shown in FIG. Have sex. Air and moisture outside the bag body 11 do not flow into the bag body 11. When the gas vent 11D has air permeability, the gas inside the bag body 11 flows out of the bag body 11 through the gas vent 11D, so that external air or the like passes through the gas vent 11D. When the gas vent part 11D does not have air permeability, naturally, external air or the like cannot flow into the bag body 11D through the gas vent part 11D. It is not possible.
[0017]
Since the gas generated inside the bag body 11 is discharged to the outside of the bag body 11 through the inner layer roughened surface portion 11H and the outer layer roughened surface processed portion 11G of the degassing portion 11D, the gas is generated inside the bag body main body 11. It can prevent that the bag main body 11 bursts by being accumulated too much. Further, an outer layer film non-adhesive portion 11E and an inner layer non-adhesive portion 11F are provided on a part of a three-layer laminate film constituting the bag body 11, and an outer layer rough surface processed portion 11G and an inner layer rough surface are provided on a part of them. Since the gas vent part 11D is configured so as to form the processing part 11H, a member such as a navel for discharging the gas inside the bag body 11 to the outside of the bag body 11 is manufactured separately from the bag body 11 and the bag. It is not necessary to attach to the body body 11, the manufacturing process of the bag body 11 can be simplified, and the cost of the bag body 11 as a whole can be reduced. Moreover, since the air etc. outside the bag body 11 do not flow into the inside, the inside of the bag body 11 is hygienic and the freshness of the contents can be maintained.
[0018]
Next, the microwave oven bag 2 according to the present embodiment will be described with reference to FIG. Although the bag 2 for microwave ovens is common with the bag 1 by this Embodiment mentioned above by having the gas vent part 11D, the shape of the bag main body 21 differs. The contents loaded in the microwave oven bag 2 are frozen foods and the like. The laminate sheet constituting the bag body 21 has a three-layer structure, but is made of a heat-resistant material so that there is no problem in food hygiene when used in a microwave oven.
[0019]
As shown in FIG. 4, the bag body 21 constituting the microwave oven bag body 2 has a substantially rectangular shape when the contents are not placed inside and not inflated. One short side of the substantially rectangular shape is located at the uppermost part of the bag body 21, and the entire short side is an opening 21 a of the bag body 21. A zipper 22 is provided around the opening 21 a, and the opening 21 a is opened and closed by opening and closing the zipper 22. When the opening 21a is closed, ventilation is impossible at the position of the opening. A gas vent is provided in the front of the bag body 21 and in the vicinity of the position where the zipper 22 is provided.
[0020]
Since the degassing portion is provided in the microwave oven bag body 2, when the microwave oven bag body 2 loaded with the contents is heated in a microwave oven, the bag body 2 can be prevented from bursting.
[0021]
The laminate film according to the present invention is not limited to the above-described embodiment, and various modifications and improvements can be made within the scope described in the claims. For example, in a laminate film constituting a bag body, an outer layer is made of a polyester layer having a thickness of 9 μm, an inner layer is made of a high-density (HD) polyethylene layer having a thickness of 20 μm, and these are bonded to each other via an adhesive layer. Although it has a three-layer structure, a stretched polypropylene layer or a stretched nylon layer may be used as the outer layer, and a low density (LD) polyethylene layer, a medium density (MD) polyethylene layer, or a high density (HD) polyethylene layer as the inner layer A medium low density (M-LD) polyethylene layer or a polypropylene layer may be used. Moreover, the thickness should just be 9-25 micrometers for an outer layer, and the inner layer should just be 20-200 micrometers. Moreover, what is necessary is just to perform the method of adhere | attaching an outer layer and an inner layer by an adhesive layer, for example by dry lamination.
[0022]
In addition, the outer layer roughened portion and the inner layer roughened portion are formed by a method in which a roller in which a protrusion such as sandpaper is mounted on the outer layer and the inner layer is pressed, but the present invention is not limited to this method. Instead of this method, for example, it may be formed by corona discharge treatment or the like.
[0023]
Moreover, the bag body of the bag body and the bag body for the microwave oven is not limited to the shape according to the present embodiment. For example, it is good also as what is called a gas palm sticking type, a gusset sticking (4 corners) type, a three-sided seal type, a standing type, a barracuda sticking type.
[0024]
The content enclosed in the bag is not limited to coffee beans. The effect of the present invention is particularly exerted when the contents are such that gas is generated after being sealed in the bag. Moreover, you may enclose a fragrance | flavor etc. as a content, for example.
[0025]
In addition, the degassing portion, the outer layer roughened surface portion, and the inner layer roughened surface portion are not limited to the shape, number, and position according to the present embodiment, and may be appropriately determined according to the type and use of the contents. Good. However, even in this case, it is necessary to configure the outer surface roughened portion so as not to face the inner surface roughened portion.
[0026]
Moreover, the laminate film which comprises the bag body by this Embodiment can be applied besides a bag body. For example, the present invention can be applied to a lid of a disposable container having a bowl shape for containing food such as oden sold at a convenience store. If the lid is made of a laminate film having a gas vent, it is possible to prevent the lid and the container from rupturing when the container covered with the lid is placed in a microwave oven. Therefore, a customer who has purchased food at a convenience store can warm the container with the lid on the microwave oven as it is after returning home.
[0027]
Furthermore, you may comprise either the outer layer 11A mentioned above, or the inner layer 11B, or both with a multilayer laminate film.
[0028]
【The invention's effect】
According to the laminate film of claim 1, the outer layer film and the inner layer film have an outer layer film non-adhered part and an inner layer film non-adhered part, respectively. An outer layer roughened surface portion and an inner layer roughened surface portion are formed. The outer layer roughened surface portion is a part of the inner layer non-adhered portion and faces a portion other than the inner layer roughened surface processed portion, and the inner layer roughened surface processed portion. The part is a part of the non-adhesive part of the outer layer film and is opposed to the part other than the roughened part of the outer layer. Therefore, when the pressure on one side of the laminate film is considerably higher than the pressure on the other side, The air can be vented from one side to the other, and when there is not much difference between the air pressure on one side and the air pressure on the other side, air can not be ventilated on either side.
[0029]
According to the bag body according to claim 2, since the bag body is constituted by a laminate film and a part of the laminate film forms a gas vent portion, the gas generated inside the bag body is passed through the gas vent portion. It can be discharged outside the body. For this reason, it is possible to prevent bag breakage due to accumulation of gas inside the bag body. Moreover, since the air outside the bag body can be prevented from flowing into the inside, the inside of the bag body is hygienic and the freshness of the contents can be maintained.
[0030]
In addition, it is not necessary to manufacture a separate member such as a navel for discharging the gas inside the bag body outside the bag body and attach it to the bag body, and the manufacturing process of the bag body can be simplified. The cost of the entire bag can be reduced.
[0031]
According to the laminate film of claim 3, since the microwave oven bag is composed of a laminate film, and a part of the laminate film has a gas vent, frozen food or the like is put into the microwave oven bag. It is possible to prevent the microwave oven bag from being ruptured when placed in a microwave oven in a state.
[0032]
According to the laminate film of claim 4, since the lid is made of a laminate film, and a part of the laminate film forms a gas vent, the container is sealed with the lid and contains the contents. It is possible to prevent the lid and the container from rupturing when placed in a microwave oven.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a bag body according to an embodiment of the present invention.
FIG. 2 is a main part front view showing a gas vent part of the bag body according to the embodiment of the present invention.
3 is a cross-sectional view taken along line III-III in FIG.
FIG. 4 is a perspective view showing a microwave oven bag according to an embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Bag body 2 Bag body 11 for microwave ovens Bag main body 11A Outer layer 11B Inner layer 11C Adhesive layer 11E Outer film non-adhesion part 11F Inner film non-adhesion part 11G Outer layer rough surface processing part 11H Inner layer rough surface processing part 21 Bag main body 21a Opening 22 zipper

Claims (4)

An outer layer film with gas barrier properties;
An inner layer film with gas barrier properties;
In a laminate film having a three-layer structure comprising an adhesive layer provided between the outer layer film and the inner layer film and bonding the outer layer film and the inner layer film,
The outer layer film has an outer layer film non-adhesive portion that directly faces the inner layer film without the adhesive layer interposed therebetween, and a portion of the outer layer film non-adhesive portion has a rough outer layer surface composed of minute through holes and recesses. A processed part is formed,
A part of the inner layer film that faces the non-adhered part of the outer layer film forms an inner layer non-adhered part, and a part of the inner layer non-adhered part has a rough inner layer composed of minute through holes and recesses. A processed part is formed,
The outer layer roughened portion is a part of the inner layer non-bonded portion and is opposed to a portion other than the inner layer roughened portion, and the inner layer roughened portion is a part of the outer film nonbonded portion. A laminate film characterized by facing a portion other than the outer surface roughened portion. 3 composed of an outer layer film having a gas barrier property, an inner layer film having a gas barrier property, and an adhesive layer provided between the outer layer film and the inner layer film to adhere the outer layer film and the inner layer film. In a bag made of a laminate film having a layer structure,
The outer layer film has an outer layer film non-adhesive portion that directly faces the inner layer film without the adhesive layer interposed therebetween, and a portion of the outer layer film non-adhesive portion has a rough outer layer surface composed of minute through holes and recesses. A processed part is formed,
A part of the inner layer film that faces the non-adhered part of the outer layer film forms an inner layer non-adhered part, and a part of the inner layer non-adhered part has a rough inner layer composed of minute through holes and recesses. A processed part is formed,
The outer layer roughened portion is a part of the inner layer non-bonded portion and is opposed to a portion other than the inner layer roughened portion, and the inner layer roughened portion is a part of the outer film nonbonded portion. The bag body is characterized in that a degassing portion is provided by both non-contact portions so as to face the portion other than the outer surface roughened portion. 3 composed of an outer layer film having a gas barrier property, an inner layer film having a gas barrier property, and an adhesive layer provided between the outer layer film and the inner layer film to adhere the outer layer film and the inner layer film. A bag body made of a laminated film having a layer structure and having an opening,
For a microwave oven having a zipper provided around the opening so that the opening can be opened and closed, and when the opening is closed, the inside and outside of the bag cannot be vented at the position of the opening In the bag body,
The outer layer film has an outer layer film non-adhesive portion that directly faces the inner layer film without the adhesive layer interposed therebetween, and a portion of the outer layer film non-adhesive portion has a rough outer layer surface composed of minute through holes and recesses. A processed part is formed,
A part of the inner layer film that faces the non-adhered part of the outer layer film forms an inner layer non-adhered part, and a part of the inner layer non-adhered part has a rough inner layer composed of minute through holes and recesses. A processed part is formed,
The outer layer roughened portion is a part of the inner layer non-bonded portion and is opposed to a portion other than the inner layer roughened portion, and the inner layer roughened portion is a part of the outer film nonbonded portion. And the degassing part is provided by both non-contact parts facing parts other than this outer-layer rough surface processed part, The bag body for microwave ovens characterized by the above-mentioned. A three-layer structure comprising an outer layer film having a gas barrier property, an inner layer film having a gas barrier property, and an adhesive layer provided between the outer layer film and the inner layer film to adhere the outer layer film and the inner layer film In the lid that seals the opening of the container that is made of the laminate film and has an opening formed at the upper end,
The outer layer film has an outer layer film non-adhesive portion that directly faces the inner layer film without the adhesive layer interposed therebetween, and a portion of the outer layer film non-adhesive portion has a rough outer layer surface composed of minute through holes and recesses. A processed part is formed,
A part of the inner layer film that faces the non-adhered part of the outer layer film forms an inner layer non-adhered part, and a part of the inner layer non-adhered part has a rough inner layer composed of minute through holes and recesses. A processed part is formed,
The outer layer roughened portion is a part of the inner layer non-bonded portion and is opposed to a portion other than the inner layer roughened portion, and the inner layer roughened portion is a part of the outer film nonbonded portion. The cover body is characterized in that a degassing part is provided by both non-contact parts so as to face parts other than the outer surface roughened part.

Images