JP2016175320A - Resin film, resin film bag, and method for producing them - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve gas barrier properties, and prevent inflow/outflow of gas (gas and odor) and the like.SOLUTION: A resin film 1 has a DLC layer 3 provided on the surface of a flexible base material layer 2 thereof and has more excellent gas barrier properties than those of a conventional resin film, and when a resin film bag 10 is formed of the resin film 1, permeation of gas (gas and odor) and the like from/to outside and/or inside is prevented.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a resin film excellent in gas barrier properties, a resin film bag product, and a method for producing them.

  In recent years, liquid-filled bag-making containers configured by sealing liquid beverages in bag-making containers made of flexible resin films have become widespread and are widely used in factories, restaurants, homes, etc. Widely used.

  However, since the conventional resin film constituting such a bag making container has a slight gas permeability (breathability), for example, when stored for a long period of time, the gas (gas) is externally applied to the resin film. It is known that the material passes through the bag and is mixed into the contents accommodated in the bag-making container. Then, there is a possibility that the quality deteriorates due to oxidization of the contents or odor mixing in an odorous environment. Also, depending on the type of resin film, for example, there may be a temperature dependency that becomes rough and easy to permeate in a warm environment, or gas (gas, odor) etc. is generated from the resin film itself. There is a risk of contamination.

  Originally, resin films have material properties that differ greatly depending on the component materials, and the resin layers with different properties are laminated to complement each other's weaknesses. It is made to do. For example, if there is a resin film that hardly allows oxygen molecules to pass through but easily permeates water vapor, and conversely, there is a resin film that hardly permeates water vapor but easily permeates oxygen molecules, and these do not adhere to each other, these are adhesives, etc. According to this, a laminated resin film that hardly transmits oxygen molecules and water vapor can be obtained. However, when the laminated resin film is exposed to a temperature somewhat higher than normal temperature, the adhesive component may vaporize and pass through both resin films. Therefore, there is a possibility that the vaporized component may permeate into the packaged product formed by using such a laminated resin film.

  In particular, when the contents are tasteless and odorless beverages such as water, it is said that there is almost no influence on the human body, but mixing of gas (gas, odor) becomes particularly problematic, such as a decrease in taste. . Moreover, it may become a problem that gas, such as the odor of the contents, permeates the film and diffuses outside.

JP 2010-269829 A

  This invention is made | formed in view of the above subjects, and it aims at providing the resin film excellent in gas-barrier property, the resin film bag goods, and these manufacturing methods.

  The resin film according to the present invention is characterized in that a DLC layer is provided on the surface of a flexible base material layer.

  The method for producing a resin film according to the present invention is characterized in that a DLC layer is provided on the surface of a flexible base material layer.

  The resin film bag according to the present invention is characterized by being composed of a resin film in which a DLC layer is provided on the surface of a flexible base material layer.

  The method for producing a resin film bag product according to the present invention is characterized in that a resin film in which a DLC layer is provided on the surface of a flexible base material layer is made into a bag.

  According to the present invention, since the DLC layer is provided on the surface of the flexible base material layer in the resin film, it is possible to impart gas barrier properties superior to those of the conventional resin film alone. Therefore, according to the present invention, when a resin film bag is made with a resin film having a DLC layer provided on the surface of the base material layer, gas (gas, odor) from the outside permeates the resin film and the resin film. It is possible to more reliably prevent the inclusion in the baggage contained in the baggage, and at the same time, the gas (gas, odor) emitted from the baggage diffuses outside through the resin film 1. Can also be prevented.

It is front sectional drawing which showed the resin film in which the DLC layer was formed in one surface of a base material layer. It is front sectional drawing which showed the resin film in which the DLC layer was formed in the other surface of a base material layer. It is front sectional drawing which showed the resin film in which the DLC layer was formed in the surface of the both sides of a base material layer. It is the flowchart which showed the manufacturing method of the resin film. It is the schematic which showed the liquid supply apparatus. It is front sectional drawing which showed the resin-made bag-made thing which consists of a resin film in which the DLC layer was formed in the inner surface of the base material layer. It is front sectional drawing which showed the resin film bag thing which consists of a resin film in which the DLC layer was formed in the outer surface of a base material layer. It is front sectional drawing which showed the resin film bag thing which consists of a resin film in which the DLC layer was formed in the inner surface and outer surface of the base material layer. It is front sectional drawing which showed the resin film bag thing which consists of a resin film in which the DLC layer was formed in the inner surface of a base material layer, and has a spout. It is the front sectional view which showed the resin film bag thing which consists of a resin film in which the DLC layer was formed in the outside surface of a base material layer, and has a spout. It is front sectional drawing which showed the DLC layer which consists of a resin film in which the DLC layer was formed in the inner surface and outer surface of a base material layer, and has a spout. (A) shows a state where a DLC layer is formed on the surface of a base material layer, and (B) is a perspective view showing a state where a resin film is formed. It is the front view which showed the resin film bag thing which provides a spout in an edge. It is the front view which showed the resin film bag thing which provides a spout in a main surface part. It is the flowchart which showed the manufacturing method of the resin-film bag thing. It is the flowchart which showed the other manufacturing method of the resin film bag thing.

  Hereinafter, a resin film to which the present invention is applied, a resin film bag product, and a method for producing the same will be described with reference to the drawings. In addition, this invention is not limited to the following examples, In the range which does not deviate from the summary of this invention, an appropriate change is possible.

<1. Description of resin film configuration>
The resin film 1 to which the present invention is applied is used as, for example, a food packaging film that wraps food or the like, or a packaging film that wraps goods other than food. Alternatively, the resin film 1 is made into a bag and used as a storage bag in which a stored item is stored, preferably a storage bag in which a fluid or the like is stored, and more preferably a storage bag in which a beverage or the like is stored. It is like that. Of course, the contained material may be in any state of gas, liquid, and solid, and is particularly preferably configured to prevent diffusion of odor components and the like that are sensitive to odor transfer to the outside.

  Specifically, as shown in FIGS. 1 to 3, the resin film 1 includes a flexible base layer 2 and a diamond-like carbon (hereinafter simply referred to as DLC) layer formed on the surface of the base layer 2. 3 is provided.

  As shown in FIGS. 1 to 3, the base material layer 2 is made of, for example, one or a plurality of flexible base resin films. As an example, although not limited thereto, the base material layer 2 is made of an olefin resin such as polyethylene or polypropylene, a polyester resin such as polyethylene terephthalate or polybutylene terephthalate, or a polyamide system generically named nylon (trademark). It is composed of a base resin film made of resin or other resin material, a composite resin film formed by combining a plurality of resin materials, or a laminate of these base resin films of the same type or different types. Yes. Furthermore, when the bag is used as a bag made of a resin film that contains a tasteless and odorless container such as water, it is desirable to select a material that does not easily generate an odor for the inner surface that contacts the container. The base material layer 2 is composed of one or a plurality of flexible base resin films mainly composed of a low odor or odorless polyethylene resin (PE resin), polypropylene resin (PP resin), or the like. It is preferable to make it. The base material layer 2 is not limited to the base material resin film made of the above-described resin material, and one or more flexible base materials mainly composed of other resin materials. You may make it comprise a material resin film.

  The DLC layer 3 is, for example, an amorphous cured film mainly composed of hydrocarbons or carbon allotropes, and has a high gas barrier property and insolubility (insoluble) that is difficult to dissolve in a liquid such as water. And is formed on the surface of the base material layer 2. Specifically, as shown in FIG. 1, the DLC layer 3 is formed only on one surface of the base material layer 2 that comes into contact with the container when the resin film 1 is formed into a bag and used as a resin film bag product. As shown in FIG. 3, as shown in FIG. 3, only on the other surface of the base material layer 2 that comes into contact with the outside air when the resin film 1 is made into a bag and used as a resin film bag product, Formed on both sides.

  Further, the DLC layer 3 is formed in the entire region or a part of the surface of the base material layer 2. For example, when the resin film 1 is used as a food packaging film or a packaging film, the DLC layer 3 is formed in the entire region of the surface of the base material layer 2. Furthermore, for example, when the resin film 1 is used as a resin film bag product, the base material layer 2 is welded (heat sealed) when the resin film 1 is made on the surface of the base material layer 2. In order to provide the seal portion 4, the DLC layer 3 is formed on a part of the surface of the base material layer 2.

<2. Explanation of resin film production method>
The resin film 1 having the above configuration is manufactured as follows. A method for producing the resin film 1 in which the DLC layer 3 is formed on the surface of the base material layer 2 as shown in FIGS. 1 to 3 will be described with reference to FIG.

  First, in step S1, the base material layer 2 is formed. Specifically, the substrate layer 2 is formed by forming a substrate resin film mainly composed of polyethylene resin, polypropylene resin or the like in a single phase or by laminating a plurality of layers.

  Next, in step S <b> 2, the DLC layer 3 is formed on the surface of the base material layer 2.

  Specifically, when the DLC layer 3 is provided on the entire surface of the base material layer 2, the DLC layer 3 of the base material layer 2 is formed using a plasma CVD (chemical vapor deposition) apparatus (not shown). The DLC layer 3 is provided by depositing DLC on the surface to be provided by plasma CVD to form a DLC thin film on the entire surface of the base material layer 2.

  Alternatively, as shown in FIGS. 1 to 3, a seal portion 4 for welding the base material layers 2 to each other when the resin film 1 is used as a resin film bag product is formed on the surface of the base material layer 2. When the DLC layer 3 is provided on a part of the surface of the base material layer 2, first, masking is performed on the surface of the base material layer 2 on which the DLC layer 3 is provided without the DLC layer 3 to be the seal portion 4 or the like. I do. Next, using a plasma CVD apparatus, DLC is deposited by plasma CVD on the surface of the base material layer 2 on which the DLC layer 3 is provided, and a DLC thin film is formed on a part of the surface of the base material layer 2. Then, the DLC layer 3 is provided.

  In addition, it is preferable to provide the DLC layer 3 on the surface of the base material layer 2 by a plasma CVD method using a plasma CVD apparatus. However, a substrate is formed by a PVD method using a PVD (physical vapor deposition) apparatus. The DLC layer 3 may be provided on the surface of the material layer 2. In this case, as the base material layer 2, it is preferable to select a material having high heat resistance.

  As described above, the resin film 1 having the DLC layer 3 formed on the surface of the base material layer 2 as shown in FIGS. 1 to 3 is manufactured.

<3. Explanation of effects of resin film>
As described above, since the DLC layer 3 is preferably provided on the surface of the flexible base material layer 2 by the CVD method, the resin film 1 can be a low hardness, that is, a highly flexible DLC layer. It becomes possible, and it can have gas barrier properties superior to those of conventional resin films alone without impairing the flexibility of the base material layer 2. Accordingly, when the resin film 1 is used as a food packaging film or a packaging film, the resin film 1 is used as an external and / or base material to be contained in the package or the resin film bag. It is possible to prevent gas (gas, odor) from the material layer 2 itself from being mixed. Conversely, the gas (gas, odor) generated by the stored material can be prevented from permeating the resin film 1 and diffusing outside.

<4. Description of resin film bag structure>
Next, the resin film bag product 10 to which the present invention is applied will be described.

  The resin film bag product 10 is formed, for example, by bag-making the above-described resin film 1, and is used as a storage bag in which a stored item is stored. Furthermore, it is preferably used as a storage bag for storing fluid or the like, and more preferably used as a storage bag for storing beverage or the like.

  Further, as shown in FIG. 5, the resin film bag 10 is detachably attached to a liquid supply device 101 such as a water server, and supplies a liquid container 120 for supplying liquid such as water or mineral water to the liquid supply device 101. The cold tank 140 and the warm tank 150 that store the liquid supplied from the fluid container 120 are also used.

  Here, the liquid supply apparatus 101 in which the resin film bag 10 is used as the fluid container 120, the cold tank 140, and the warm tank 150 will be described. For example, as shown in FIG. 5, the liquid supply apparatus 101 is detachably mounted with a fluid container 120 containing a fluid in a joint member 130 of a container mounting portion 111 on the upper side of the apparatus main body 110, and the apparatus main body 110. A cold tank 140 and a warm tank 150 that store the fluid supplied from the fluid container 120 are housed therein.

  As shown in FIG. 5, the fluid container 120 including the resin film bag 10 or the like is an exchangeable container that can be attached to and detached from the joint member 130 of the container mounting portion 111 on the upper side of the apparatus main body 110. A fluid is accommodated and disposed above the cold tank 140 and the warm tank 150 to supply liquid to the cold tank 140 and the warm tank 150.

  The fluid container 120 is a soft container made of a flexible material having flexibility. Furthermore, the volume of the fluid container 120 increases or decreases depending on the volume (liquid amount) of the liquid contained therein. Further, the fluid container 120 is provided with, for example, a crease line that is folded as the liquid to be stored decreases, and the liquid is gradually reduced as the liquid decreases, so that the liquid is cooled to the end until the liquid is cooled. In addition, it can be configured to flow to the temperature tank 150.

  The fluid container 120 as described above does not require a vent, unlike a hard container whose volume does not vary depending on the volume of the liquid stored, and the volume decreases as the liquid stored decreases. Since it does not come into contact with the outside air, propagation of germs and the like inside is prevented, and a good hygiene state can be maintained over a long period of time.

  The cold tank 140 and the warm tank 150 configured by the resin film bag 10 as in the fluid container 120 are, for example, soft containers configured by a flexible material having flexibility as in the fluid container 120. is there. Further, like the fluid container 120, the cold tank 140 and the warm tank 150 increase or decrease in volume depending on the volume (liquid amount) of the stored liquid. Further, the cold tank 140 and the warm tank 150 are provided with, for example, a crease line that is folded as the liquid to be stored decreases. Can be configured to be ejected.

  As with the fluid container 120, the cold tank 140 and the warm tank 150 as described above do not require a vent hole like a hard container whose volume does not vary depending on the volume of the liquid stored, and the liquid stored is reduced. Accordingly, the volume also decreases, and the contained liquid does not come into contact with the outside air, so that propagation of germs and the like inside is prevented, and good hygiene can be maintained for a long time.

  In the cold tank 140, when the fluid container 120 is attached to the joint member 130, the fluid flows from the fluid container 120 into the inside through the joint member 130 and the first cold pipe 180. In the cold tank 140, the fluid flowing in from the fluid container 120 is cooled to a predetermined temperature by a cooling mechanism installed outside and / or inside the cold tank 140. Next, when the first discharge operation unit 172 is operated by the user or the like, the cold tank 140 supplies, for example, the fluid cooled by the cooling mechanism to the first supply port 170 via the second cold pipe 181. Then, it is supplied to the outside from the first supply port 170.

  Furthermore, when the fluid container 120 is attached to the joint member 130, the fluid flows into the temperature tank 150 from the fluid container 120 through the joint member 130 and the first temperature pipe 182. In the temperature tank 150, the fluid that flows in from the fluid container 120 is heated to a predetermined temperature by a heating mechanism installed in the temperature tank 150. Next, when the second discharge operation unit 173 is operated by the user or the like, the temperature tank 150 supplies, for example, the fluid heated by the heating mechanism to the second supply port 171 via the second temperature pipe 183. Then, it is supplied to the outside from the second supply port 171.

  The supply port and the discharge operation unit include a first supply port 170 and a first discharge operation unit 172 that supply a cooled fluid, and a second supply port 171 and a second discharge operation unit 173 that supply a heated fluid. However, when a common discharge operation unit is operated, a structure in which a cooled fluid and a heated fluid are switched and supplied from a common supply port may be used.

  In addition to water and mineral water, etc., the fluid container 120 is a soft drink such as juice, coffee or tea, a fluid seasoning such as drinking water, liquor, soy sauce, mirin, dressing, miso, miso soup or corn. You may make it store food / beverage including fluid dishes, such as soup, fluids, such as an industrial product, viscous fluid, a gel-like body, a slurry-like body.

  Specifically, as shown in FIGS. 6 to 11, the resin film bag 10 is composed of a resin film 1 in which a DLC layer 3 is provided on the surface of a flexible base material layer 2. Further, the resin film bag 10 is made by using the resin film 1 and, as shown in FIG. 12B, the edge of the resin film 1 is welded after the resin film 1 is folded. It is formed into a bag shape.

  Moreover, as shown in FIGS. 13 and 14, the resin film bag 10 may have a spout 11 that communicates the inside and the outside, and does not have the spout 11 as shown in FIGS. 6 to 8. You may do it. Further, when the spout 11 is provided, it may be provided at the edge of the resin film bag product 10 as shown in FIG. 13, or provided at the main surface portion of the resin film bag product 10 as shown in FIG. You may do it.

  Here, as shown in FIGS. 6 to 11, the resin film 1 constituting the resin film bag product 10 includes a flexible base layer 2 and a DLC layer 3 formed on the surface of the base layer 2. And.

  The base material layer 2 is made of, for example, one or a plurality of flexible base resin films. As an example, although not limited thereto, the base material layer 2 is made of an olefin resin such as polyethylene or polypropylene, a polyester resin such as polyethylene terephthalate or polybutylene terephthalate, or a polyamide system generically named nylon (trademark). It is composed of a base resin film made of resin or other resin material, a composite resin film formed by combining a plurality of resin materials, or a laminate of these base resin films of the same type or different types. Yes. Furthermore, when storing a tasteless and odorless container such as water, it is desirable to select a material that does not easily generate odor on the surface in contact with the container, and the base material layer 2 has a low odor or odorless property. It is preferable to be constituted by one or a plurality of flexible base resin films mainly composed of polyethylene resin or polypropylene resin. However, since the DLC layer 3 is formed, even the base material layer 2 including materials, additives, and adhesives that easily generate odor components and the like, can transfer odors to the contents. Can be prevented, and the choice of film material can be expanded. The base material layer 2 is not limited to the base material resin film made of the above-described resin material, and one or more flexible base materials mainly composed of other resin materials. You may make it comprise a material resin film.

  The DLC layer 3 is, for example, an amorphous cured film mainly composed of hydrocarbons or carbon allotropes, and has a high gas barrier property and insolubility (insoluble) that is difficult to dissolve in a liquid such as water. And is formed on the surface of the base material layer 2. Specifically, as shown in FIGS. 6 and 9, the DLC layer 3 is formed only on the inner surface of the base material layer 2 in contact with the contents, and the base material layer 2 in contact with the outside air as shown in FIGS. 7 and 10. As shown in FIGS. 8 and 11, only the outer surface of the base material layer 2 is formed on both the inner surface and the outer surface.

  The DLC layer 3 is formed on a part of the surface of the base material layer 2. Specifically, the DLC layer 3 is formed on the entire area of the inner surface and / or the outer surface excluding the seal portion 4 of the base material layer 2. Further, when the resin film bag 10 has the spout 11, the DLC layer 3 may be formed on the inner surface and / or the outer surface of the spout 11. The DLC layer 3 may not be formed.

<5. Explanation of manufacturing method of resin film bag>
The resin film bag 10 having the above-described configuration is manufactured as follows.

  Here, a manufacturing method of the resin film bag product 10a made of the resin film 1 in which the DLC layer 3 as shown in FIG. 6 is formed on the inner surface of the base material layer 2 will be described with reference to FIG.

  First, in step S11, the base material layer 2 is formed. Specifically, the substrate layer 2 is formed by forming a substrate resin film mainly composed of polyethylene resin, polypropylene resin or the like in a single phase or by laminating a plurality of layers. About this lamination, a plurality of resin films 1 may be simply stacked on top of each other to form a laminated structure, or may be configured by joining each other. In addition, it is not always necessary to laminate a plurality of types of resin materials, and of course, it may be simply constituted by a single layer resin material.

  Next, in step S <b> 12, the DLC layer 3 is formed on the surface of the base material layer 2. Specifically, first, masking is performed in order to form a seal portion 4 for welding the base material layers 2 to each other at the edge of the inner surface of the base material layer 2. Then, using a plasma CVD apparatus, DLC is deposited on the inner surface of the base material layer 2 by a plasma CVD method to form a DLC thin film. 1 and 12A, the DLC layer 3 is provided on the inner surface of the base material layer 2, and the seal portion 4 is formed at the edge of the base material layer 2. As shown in FIG. As described above, first, the resin film 1 is manufactured.

  In addition, although it is preferable to provide the DLC layer 3 on the surface of the base material layer 2 by a plasma CVD method using a plasma CVD apparatus, the surface of the base material layer 2 is formed by a PVD method using a PVD apparatus. A DLC layer 3 may be provided. In this case, as the base material layer 2, it is preferable to select a material having high heat resistance.

  Next, in step S13, the resin film 1 is made. Specifically, as shown in FIGS. 1 and 12B, the resin film 1 is folded in two so that the inner surfaces are close to each other. And as shown in FIG.12 (B), the seal part 4a of the both sides of the width direction of the resin film 1 is welded, and as shown in FIG. It forms so that it may become the bag shape which has the opening part 12 in. In addition, for example, when the original shape of the resin film 1 is cylindrical, it is possible to employ a so-called two-way seal that seals the cylindrical mouth, and bend one film at the center, Sealing can also be performed by a method such as a three-way seal that seals the peripheral portion other than the folding portion, or a so-called four-side seal that seals the peripheral portion by overlapping two films.

  As described above, the resin film bag product 10 a made of the resin film 1 in which the DLC layer 3 as shown in FIG. 6 is formed on the inner surface of the base material layer 2 is manufactured. After that, after the resin film bag 10a is filled with the contents from the opening 12, the seal part 4b (opening 12) on one end side in the longitudinal direction of the resin film 1 is welded. It is possible to enclose the contents.

  In step S12, instead of the inner surface of the base material layer 2, the outer surface of the base material layer 2 is masked and the DLC layer 3 is provided so that the DLC layer 3 as shown in FIG. A resin film bag 10b made of the resin film 1 formed on the outer surface of the layer 2 can be manufactured. When the DLC layer 3 is provided on the outer surface of the base material layer 2, the outer surface of the seal portion 4 is used. The DLC layer 3 may be provided in a portion corresponding to the above, and in this case, the masking step and the like can be omitted.

  Furthermore, in step S12, in addition to the inner surface of the base material layer 2, the outer surface of the base material layer 2 is masked to provide the DLC layer 3, so that the DLC layer 3 as shown in FIG. A resin film bag 10c made of the resin film 1 formed on the inner surface and the outer surface of the layer 2 can be manufactured. According to such a configuration, it is possible to obtain not only a so-called pillow type but also a more complicated gusset type bag product as the resin film bag product 10.

<6. Explanation of other production methods for resin film bags>
Next, another manufacturing method of the resin film bag product 10 will be described. Here, another manufacturing method of the resin film bag product 10a made of the resin film 1 in which the DLC layer 3 as shown in FIG. 6 is formed on the inner surface of the base material layer 2 will be described with reference to FIG.

  First, in step S21, the base material layer 2 is formed. Specifically, the substrate layer 2 is formed by forming a substrate resin film mainly composed of polyethylene resin, polypropylene resin or the like in a single phase or by laminating a plurality of layers. About this lamination, a plurality of resin films 1 may be simply stacked on top of each other to form a laminated structure, or may be configured by joining each other. In addition, it is not always necessary to laminate a plurality of types of resin materials, and of course, it may be simply constituted by a single layer resin material.

  Next, in step S22, the base material layer 2 is formed. Specifically, the base material layer 2 is folded in two. And the edge part of the both sides of the width direction of the base material layer 2 is welded, and the base material layer 2 is formed so that it may become a bag shape which has the opening part 12 in the one end side of the longitudinal direction of the base material layer 2. FIG.

  Next, in step S <b> 23, the DLC layer 3 is formed on the surface of the base material layer 2. Specifically, first, masking is performed in order to form a seal portion 4b for welding the opening portion 12 to an edge portion on one end side in the longitudinal direction of the inner surface of the base material layer 2. And as shown in FIG. 6, inflow gas, such as air, flows in into the inside from the opening part 12, and the bag-shaped base material layer 2 is expanded. And in that state, using a plasma CVD apparatus, DLC is vapor-deposited on the inner surface of the base material layer 2 by the plasma CVD method to form a DLC thin film. And as shown in FIG. 6, while providing the DLC layer 3 in the inner surface of the base material layer 2, the seal part 4b is formed in the edge part of the longitudinal direction one end side of the base material layer 2. As shown in FIG.

  As described above, the resin film bag product 10 a made of the resin film 1 in which the DLC layer 3 as shown in FIG. 6 is formed on the inner surface of the base material layer 2 is manufactured. After that, after the resin film bag 10a is filled with the contents from the opening 12, the seal part 4b (opening 12) on one end side in the longitudinal direction of the resin film 1 is welded. It is possible to enclose the contents.

  In step S23, masking is performed on the outer surface of the base material layer 2 instead of the inner surface of the base material layer 2, and the DLC layer 3 is provided in a state where the base material layer 2 is expanded. A resin film bag 10b made of the resin film 1 having the DLC layer 3 as shown in FIG. At this time, of course, masking is performed on a required portion of the outer surface of the base material layer 2, but masking is not always necessary, and the DLC layer 3 must be provided in a state where the base material layer 2 is expanded. The DLC layer 3 may be provided on the outer surface of the base material layer 2 as a non-expandable body.

  Further, in step S23, masking is performed on the outer surface of the base material layer 2 in addition to the inner surface of the base material layer 2, and the DLC layer 3 is provided in a state where the base material layer 2 is expanded, whereby FIG. A resin film bag 10c made of the resin film 1 having the DLC layer 3 as shown in FIG. 4 formed on the inner surface and the outer surface of the base material layer 2 can be manufactured.

<7. Description of a method for producing a resin film bag having spout>
Next, another method for manufacturing the resin film bag 10 having the spout 11 will be described. Here, a method for producing a resin film bag 10d having the DLC layer 3 as shown in FIG. 9 formed of the resin film 1 formed on the inner surface of the base material layer 2 and having the spout 11 will be described with reference to FIG. To do.

  First, in step S21, the base material layer 2 is formed. Specifically, the substrate layer 2 is formed by forming a substrate resin film mainly composed of polyethylene resin, polypropylene resin or the like in a single phase or by laminating a plurality of layers. About this lamination, a plurality of resin films 1 may be simply stacked on top of each other to form a laminated structure, or may be configured by joining each other. In addition, it is not always necessary to laminate a plurality of types of resin materials, and of course, it may be simply constituted by a single layer resin material.

  Next, in step S22, the base material layer 2 is formed. Specifically, the base material layer 2 is folded in two. And while welding the edge part of the both sides of the width direction of the base material layer 2, the edge part of the one end side of the longitudinal direction of the base material layer 2 is welded, Furthermore, the spout 11 is made into the longitudinal direction of the base material layer 2. It welds to the edge part (refer FIG. 13) of the one end side, or the main surface part (refer FIG. 14) of the base material layer 2, and forms the base material layer 2 so that it may become a bag shape which has the spout 11. FIG.

  Next, in step S <b> 23, the DLC layer 3 is formed on the surface of the base material layer 2. Specifically, first, as shown in FIG. 9, an inflow gas such as a predetermined gas for appropriately generating an atmosphere is introduced from the spout 11 to inflate the bag-like base material layer 2. In this state, a DLC thin film is formed by depositing DLC on the inner surface of the base material layer 2 through the spout 11 by plasma CVD using a plasma CVD apparatus. Then, as shown in FIG. 9, the DLC layer 3 is provided on the inner surface of the base material layer 2.

  As described above, the resin film bag 10d having the spout 11 is manufactured by the resin film 1 having the DLC layer 3 as shown in FIG. 9 formed on the inner surface of the base material layer 2. After that, the resin film bag 10d is filled with the contents from the spout 11, and then the opening of the spout 11 is sealed with a sealing means such as a cap or a film member, so that the contents are contained inside. Can be encapsulated.

  In step S23, instead of the inner surface of the base material layer 2, the outer surface of the base material layer 2 is masked, and the DLC layer 3 is provided in a state where the base material layer 2 is expanded. The DLC layer 3 as shown in FIG. 5 is made of the resin film 1 formed on the outer surface of the base material layer 2, and a resin film bag 10e having a spout 11 can be manufactured. At this time, of course, masking is performed on a required portion of the outer surface of the base material layer 2, but masking is not always necessary, and the DLC layer 3 must be provided in a state where the base material layer 2 is expanded. The DLC layer 3 may be provided on the outer surface of the base material layer 2 as a non-expandable body.

  Furthermore, in step S23, in addition to the inner surface of the base material layer 2, the outer surface of the base material layer 2 is masked, and the DLC layer 3 is provided in a state where the base material layer 2 is expanded. A DLC layer 3 as shown in FIG. 5 is formed of the resin film 1 formed on the inner surface and the outer surface of the base material layer 2, and a resin film bag 10 f having a spout 11 can be manufactured.

<8. Explanation of effects of resin film bag>
As described above, the resin film bag 10 is composed of the resin film in which the DLC layer 3 is preferably provided on the surface of the flexible base layer 2 by the CVD method. It is possible to make a highly durable DLC layer, and it has a gas barrier property that is superior to that of a conventional resin film bag made of only a resin film without impairing the flexibility of the base material layer 2. Can have. Therefore, the resin film bag product 10 can prevent the gas (gas, odor) from the outside and / or the base material layer 2 itself from being mixed into the material accommodated therein. Conversely, the gas (gas, odor) generated by the stored material can be prevented from permeating the resin film 1 and diffusing outside.

  Moreover, since the DLC layer 3 is provided on the surface excluding the seal part 4 of the base material layer 2 in the bag-making state, the resin film bag-made product 10 has a DLC layer 3 when the bag is made using the resin film 1. Since the base material layers 2 superior in heat-weldability to the DLC layer 3 can be welded to each other instead of each other, the resin film 1 can be easily and surely made into a bag, and high airtightness is ensured. I can do it. According to such a configuration, it is possible to obtain not only a so-called pillow type but also a more complicated gusset type bag product as the resin film bag product 10.

  Further, the resin film bag 10 is formed by providing the DLC layer 3 on the inner surface of the base material layer 2 in contact with the container, so that the base material layer 2 outside the DLC layer 3 is made of any resin material. Even if it is composed of a material resin film, gas (gas, odor) from the outside and / or the base material layer 2 itself can be prevented from being mixed into the material accommodated inside, and at the same time, the gas emitted by the material contained It is also possible to prevent (gas, odor) from permeating the resin film 1 and diffusing outside.

  Moreover, the resin film bag 10 can prevent the gas (gas, odor) from being mixed from the outside into the accommodation housed inside by providing the DLC layer 3 on the outer surface of the base material layer 2. Further, by forming the base layer 2 with a low-odor or non-odor base resin film such as polyethylene resin or polypropylene resin, the same as when the DLC layer 3 is provided on the inner surface of the base layer 2, It is possible to prevent a gas (gas, odor) from being mixed into the accommodation housed inside from the outside and / or the base material layer 2 itself.

  In addition, the resin film bag product 10 is provided with the DLC layer 3 on the inner surface and the outer surface of the base material layer 2, so that gas (gas, odor) is mixed from the outside into the container accommodated inside. It can prevent more reliably, and can also prevent that the gas (gas, odor) emitted from the stored material permeates the resin film 1 and diffuses outside.

<9. Description of Modification>
Note that the resin film bag 10 is not limited to a so-called U-shaped three-side sealed bag in which the resin film 1 is folded in half and the three sides other than the fold are sealed. A so-called four-side sealed bag in which the planar resin film 1 is disposed oppositely and sealed on all sides, a jointed bag in which a single resin film 1 is bonded to the back and the bottom, and a gusset (folded portion) on the side. Other types of bags such as a gusset bag, a standing pouch bag having a gusset portion (folded portion) on the bottom, and a two-side sealed bag product that seals the opening of a tubular film may be used. The spout 11 may be provided in the bag. Further, it goes without saying that the present invention is applicable even to a film having a vapor deposition layer such as an aluminum vapor deposition layer or a silica vapor deposition layer, or a resin film using an aluminum laminate material.

  Even in such a resin film bag product 10, similarly, the base material layer 2 is formed, the DLC layer 3 is formed on the inner surface and / or outer surface of the base material layer 2, and the resin film 1 is The bag is formed into various bags, or the base layer 2 is formed, the base layer 2 is formed into various bags, and the base layer 2 is inflated while the base layer 2 is inflated. In addition, by forming the DLC layer 3 on the outer surface, the DLC layer 3 can be provided on the inner surface and / or the outer surface of the base material layer 2. It is possible to prevent gas (gas, odor) from being mixed from the base material layer 2 itself, and at the same time, prevent the gas (gas, odor) emitted from the contained material from permeating the resin film 1 and diffusing outside. I can do it.

DESCRIPTION OF SYMBOLS 1 Resin film, 2 Base material layer, 3 DLC layer, 4 Seal part, 10 Resin film bag, 11 Spout, 12 Opening part, 101 Liquid supply apparatus, 110 Apparatus main body, 111 Container mounting part, 120 Fluid container, 130 Joint Member, 140 cold tank, 150 temperature tank, 170 first supply port, 171 second supply port, 172 first discharge operation part, 173 second discharge operation part, 180 first cold pipe, 181 second cold pipe, 182 first One temperature piping, 183 Second temperature piping

The resin film according to the present invention is characterized in that a DLC layer or a silica vapor deposition layer is provided on the surface of a flexible base material layer.

The method for producing a resin film according to the present invention is characterized in that a DLC layer or a silica vapor deposition layer is provided on the surface of a flexible base material layer.

The resin film bag according to the present invention is characterized in that it is composed of a resin film in which a DLC layer or a silica vapor deposition layer is provided on the surface of a flexible base material layer.

The method for producing a resin film bag according to the present invention is characterized in that a resin film in which a DLC layer or a silica vapor deposition layer is provided on the surface of a flexible base material layer is bag-made.

According to the present invention, since the DLC layer or the silica vapor deposition layer is provided on the surface of the flexible base material layer in the resin film, the gas barrier property superior to that of the conventional resin film alone can be imparted. I can do it. Therefore, according to the present invention, when a bag made of a resin film is made with a resin film having a DLC layer or a silica deposited layer on the surface of the base material layer, gas (gas, odor) from the outside permeates the resin film. Thus, it is possible to more reliably prevent the inclusion in the accommodation contained in the resin film bag, and at the same time, the gas (gas, odor) emitted from the accommodation permeates the resin film 1. It can also be prevented from diffusing outside.

Claims (33)

  A resin film, wherein a DLC layer is provided on a surface of a flexible base material layer.   The resin film according to claim 1, wherein the DLC layer is provided on a surface excluding a seal portion of the base material layer in a bag-making state.   The resin film according to claim 1, wherein the DLC layer is provided on one surface and / or the other surface of the base material layer.   The resin film according to claim 1, wherein the resin film is a resin film for forming a resin film bag product.   The said DLC layer is provided in one surface of the said base material layer used as the inner surface of the said resin film bag-making thing, The resin film of Claim 4 characterized by the above-mentioned.   6. The resin film according to claim 4, wherein the DLC layer is provided on the other surface of the base material layer that is an outer surface of the resin film bag product.   The resin film according to any one of claims 4 to 6, wherein the resin film bag product is a bag product in which a beverage is accommodated.   The resin film according to any one of claims 1 to 7, wherein the base material layer contains, as a main component, either a polyethylene resin (PE resin) or a polypropylene resin (PP resin).   A method for producing a resin film, comprising providing a DLC layer on a surface of a flexible base material layer.   The method for producing a resin film according to claim 9, wherein the DLC layer is provided on a surface excluding a seal portion of the base material layer in a bag-making state.   The method for producing a resin film according to claim 9 or 10, wherein the DLC layer is provided on one surface and / or the other surface of the base material layer.   The method for producing a resin film according to claim 9, wherein the resin film is a resin film for forming a resin film bag product.   The method for producing a resin film according to claim 12, wherein the DLC layer is provided on one surface of the base material layer that is an inner surface of the resin film bag product.   14. The method for producing a resin film according to claim 12, wherein the DLC layer is provided on the other surface of the base material layer which is an outer surface of the resin film bag product.   The method for producing a resin film according to claim 12, wherein the DLC layer is provided on a surface of the base material layer by inflating the base material layer that has been made in a bag.   The said resin film bag thing has a spout, The said DLC layer is provided in the surface of the said base material layer, expanding the said base material layer made from this spout, The said base material layer is characterized by the above-mentioned. A method for producing a resin film.   The method for producing a resin film according to any one of claims 12 to 16, wherein the resin film bag product is a bag product in which a beverage is accommodated.   The method for producing a resin film according to any one of claims 9 to 17, wherein the base material layer contains, as a main component, either a polyethylene resin (PE resin) or a polypropylene resin (PP resin).   A resin film bag product comprising a resin film having a DLC layer provided on a surface of a flexible base material layer.   The said DLC layer is provided in the surface except the seal part of the said base material layer in a bag making state, The resin film bag-making thing of Claim 19 characterized by the above-mentioned.   The resin film bag product according to claim 19 or 20, wherein the DLC layer is provided on an inner surface of the base material layer.   The resin film bag product according to any one of claims 19 to 21, wherein the DLC layer is provided on an outer surface of the base material layer.   The said resin film bag thing has spout, The resin film bag thing in any one of Claim 19 thru | or 22 characterized by the above-mentioned.   The resin film bag product according to any one of claims 19 to 23, wherein the resin film bag product is a bag product in which a beverage is accommodated.   25. The resin film bag product according to any one of claims 19 to 24, wherein the base material layer contains, as a main component, either a polyethylene resin (PE resin) or a polypropylene resin (PP resin).   A method for producing a resin film bag product, comprising forming a resin film having a DLC layer provided on a surface of a flexible base material layer.   27. The method for producing a resin film bag product according to claim 26, wherein the DLC layer is provided on a surface excluding a seal portion of the base material layer in a bag-making state.   The method for producing a resin film bag product according to claim 26 or 27, wherein the DLC layer is provided on an inner surface of the base material layer.   The method for producing a resin film bag product according to any one of claims 26 to 28, wherein the DLC layer is provided on an outer surface of the base material layer.   30. The method for producing a resin film bag product according to claim 26, wherein the DLC layer is provided on the surface of the base material layer by inflating the base material layer.   The said resin film bag thing has a spout, The said DLC layer is provided in the surface of the said base material layer, expanding the said base material layer made from this spout, The said base material layer is characterized by the above-mentioned. A method for producing a resin film bag.   32. The method for producing a resin film bag product according to claim 26, wherein the resin film bag product is a bag product containing a beverage.   The method for producing a resin film bag product according to any one of claims 26 to 32, wherein the base material layer contains, as a main component, either a polyethylene resin (PE resin) or a polypropylene resin (PP resin). .