JP2014221666A - Film roll package - Google Patents

Abstract

PROBLEM TO BE SOLVED: To maintain moisture absorption performance of a hygroscopic laminated film even in a state that it is taken out from an exterior body in addition to in a state that it is packed in the exterior body.SOLUTION: A film roll package 300 comprises: a roll body 100 of a hygroscopic laminated film; and an exterior body 200 for storing it. The hygroscopic laminated film comprises: a sealant layer including a molecular sieve; and a steam barrier layer disposed on one of the faces of the sealant layer, and further has dead-fold property. The exterior body 200 is formed of a moisture-proofness exterior film having a steam barrier layer and dead-fold property, and the roll body 100 is subjected to decompression packaging by the exterior body 200.

Description

  The present invention relates to a film roll package.

Some foods and medicines are degraded by moisture absorption. In particular, depending on the type of chemicals, there are those that cause a significant deterioration in quality due to the presence of a small amount of water.
Conventionally, for example, in foods, in order to prevent quality deterioration due to moisture absorption, a method in which a sachet of silica gel or the like as a desiccant is housed in a container together with the food. However, in this method, a child or the like may accidentally eat the desiccant.
On the other hand, in chemical packaging such as strip packaging, it is physically difficult to accommodate a small bag of silica gel or the like together with a chemical in a container.
For these problems, as a method for accommodating foods that dislike moisture in a container, a means for suppressing moisture intrusion from the outside and dehumidifying the container by providing the container with a moisture absorption function has been proposed. Yes. For example, in Patent Document 1, as such a container, moisture absorption of a polyester resin layer, an aluminum foil, and an inner material layer obtained by coextruding a moisture absorption layer made of a blend of polyolefin and zeolite with a heat sealable film layer. A humidity control laminated bag using a conductive laminated film is disclosed.
According to the method of Patent Document 1, moisture absorption in the container is performed by the container itself, so that a desiccant becomes unnecessary. In addition, the inside of the container is dehumidified on the entire surface of the bag, and moisture intrusion from outside air is blocked.
In general, the hygroscopic laminated film is a roll body, and the roll body is packaged and distributed in an exterior body for the purpose of protection from physical impact and prevention of moisture intrusion in the outside air. .

Japanese Patent No. 2885079

By the way, in the process of filling the container with the chemical, for example, the roll body of the hygroscopic laminated film that is the material of the container is taken out from the state packaged in the exterior body, and the hygroscopic laminated film is drawn out from the roll body. However, a container for filling the medicine is formed, and the container is filled with the medicine. Usually, when the container is filled with chemicals, it takes one hour or more to finish using one roll body, and the roll body is exposed to the outside air during that time.
In a method such as Patent Document 1 that imparts a hygroscopic function to a container itself filled with chemicals or the like, while the roll body is exposed to the outside air, the outside air enters from the end surface of the roll body, and the hygroscopic laminated film is exposed to the outside air. As a result, the moisture absorption capacity of the hygroscopic laminated film is lowered before the chemical is filled.
Then, this invention makes it a subject to the film roll package which maintains the hygroscopic capability of a hygroscopic laminated | multilayer film even if it is the state taken out from the exterior body in addition to the state packaged in the exterior body.

The film roll package of the present invention includes a roll body of a hygroscopic laminated film and an exterior body that accommodates the roll body. The hygroscopic laminated film includes a sealant layer containing a molecular sieve and one of the sealant layers. A water vapor barrier layer provided on the surface, and has a deadfold property, and the outer body comprises a water vapor barrier layer and a moisture proof outer film having a deadfold property, and the roll body is The outer package is packaged under reduced pressure.
The water vapor barrier layer of the hygroscopic laminated film preferably has a base material layer and a film layer having a water vapor barrier property provided on one surface of the base material layer.
Moreover, it is preferable that the water vapor | steam barrier layer of the said hygroscopic laminated | multilayer film is further equipped with the film layer which has a deadfold property between the said base material layer and the film layer which has the said water vapor | steam barrier property.
The sealant layer includes a laminate layer, a seal layer, and a hygroscopic layer provided between the laminate layer and the seal layer, and the laminate layer is adjacent to the water vapor barrier layer of the hygroscopic laminate film. And it is preferable that the said hygroscopic layer contains a molecular sieve.
It is preferable that the water vapor barrier layer of the outer package includes a base material layer and a film layer having a water vapor barrier property provided on one surface of the base material layer.
Moreover, it is preferable that the water vapor | steam barrier layer of the said exterior body is further equipped with the film layer which has a deadfold property between the said base material layer and the film layer which has the said water vapor | steam barrier property.

  According to the film roll package of the present invention, the hygroscopic ability of the hygroscopic laminated film is maintained even in a state where the film roll package is taken out of the outer package in addition to the state packaged in the outer package.

It is a photograph which shows one Embodiment of the film roll package of this invention. It is a photograph which shows one Embodiment of the roll body of a hygroscopic laminated | multilayer film. It is sectional drawing which shows one Embodiment of a hygroscopic laminated | multilayer film. It is sectional drawing which shows one Embodiment of a moisture-proof exterior film.

An example of the film roll package of the present invention will be described below with reference to the drawings.
A film roll package 300 in FIG. 1 includes a roll body 100 of a hygroscopic laminated film and an exterior body 200 that accommodates the roll body 100, and the roll body 100 is packaged under reduced pressure by the exterior body 200.

(Roll body of hygroscopic laminated film)
In FIG. 2, one Embodiment of the roll body of a hygroscopic laminated | multilayer film is shown.
In FIG. 2, the roll body 100 has a cylindrical shape in which the hygroscopic laminated film 1 is wound around a core tube 50, and is flatly placed with its end face facing up.

<Hygroscopic laminated film>
FIG. 3 shows an embodiment of a hygroscopic laminated film.
The hygroscopic laminated film 1 of FIG. 3 includes a sealant layer 10 and a water vapor barrier layer 20 provided on one surface 10 a of the sealant layer 10.
The thickness t1 of the hygroscopic laminated film 1 is determined in consideration of the layer structure and the like, and is preferably 30 to 120 μm, and more preferably 50 to 100 μm, for example. If the thickness t1 of the hygroscopic laminated film 1 is less than the preferred lower limit, the strength of the hygroscopic laminated film 1 may be reduced, and if it exceeds the preferred upper limit, the flexibility of the hygroscopic laminated film 1 is impaired, and handling is difficult. May be complicated.

The hygroscopic laminated film 1 has deadfold properties throughout the laminated film.
In the present invention, “dead fold property” refers to a property in which a certain object is deformed by receiving stress such as twisting or bending and does not return to its original state when the stress is removed.
In the present invention, “having deadfold property” is determined from the result of the following deadfold property test.
A rectangular film of 10 cm × 10 cm is folded in two by placing a flat plate (12.5 cm × 8 cm) with a load of 500 g so that the opposing sides are aligned. At this time, the flat plate is placed so as to cover the film. When the flat plate is placed for 30 seconds and then removed, the distance between the opposing sides is within 10 mm is defined as “having deadfold property”. In the hygroscopic laminated film 1, the distance between the opposite sides is preferably 10 mm or less, more preferably 5 mm or less.
The deadfold property of the hygroscopic laminated film 1 can be controlled by selecting a layer configuration or a material of each layer.

≪Sealant layer of hygroscopic laminated film≫
The hygroscopic laminated film 1 has a sealing property by including the sealant layer 10.
The sealant layer 10 contains a molecular sieve. Thereby, the hygroscopic laminated film 1 has a hygroscopic property.
The thickness of the sealant layer 10 is determined in consideration of the configuration of the hygroscopic laminated film 1 and the like, for example, preferably 5 to 80 μm, and more preferably 10 to 50 μm. If the thickness of the sealant layer 10 is less than the preferable lower limit value, the hygroscopic property of the hygroscopic laminated film 1 may be reduced, and if it exceeds the preferable upper limit value, it is difficult to ensure the thickness of the water vapor barrier layer 20.

  In FIG. 3, the sealant layer 10 includes a laminate layer 11, a seal layer 13, and a hygroscopic layer 12 provided between the laminate layer 11 and the seal layer 13. The laminate layer 11 is adjacent to the water vapor barrier layer 20 of the hygroscopic laminated film 1.

Materials for forming the laminate layer 11 include polyethylene such as linear low density polyethylene (LLDPE), low density polyethylene (LDPE), medium density polyethylene, and high density polyethylene; ethylene / vinyl acetate copolymer (EVA), ethylene / acrylic acid Copolymer (EAA), ethylene / methacrylic acid copolymer (EMAA), ethylene / ethyl acrylate copolymer (EEA), ionomer, polypropylene, or a mixture thereof, or a mixture of one or more of these with an ethylene / 1-butene copolymer Is mentioned. Among these, polyethylene is preferable.
For example, the thickness of the laminate layer 11 is preferably 5 to 20 μm, and more preferably 10 to 15 μm. If the thickness of the laminate layer 11 is less than the preferable lower limit value, the adhesion between the sealant layer 10 and the water vapor barrier layer 20 may be deteriorated, and if it exceeds the preferable upper limit value, the flexibility of the hygroscopic laminated film 1 may be impaired. There is.

Examples of the material forming the hygroscopic layer 12 include a material similar to the material forming the laminate layer 11 and a molecular sieve added thereto. Especially, what added the molecular sieve to polyethylene is preferable.
As the molecular sieve, a crystalline zeolite in which a metal cation is bound to an aluminosilicate is preferable. This crystalline zeolite can exhibit a sufficient hygroscopic effect not only under a high humidity such as 50% or more relative humidity as compared with silica but also under a low humidity such as 20% or less relative humidity. .
The particle size of the molecular sieve is preferably about 5 to 50 μm, more preferably about 10 to 20 μm. The “particle diameter” here is measured by an electric resistance / Coulter counter type.
5 mass% or more is preferable in the hygroscopic layer 12, and, as for content of a molecular sieve, 5-50 mass% is more preferable. When the molecular sieve content is less than the preferred lower limit, it is difficult to obtain a sufficient moisture absorption effect, and even when the preferred upper limit is exceeded, the moisture absorption effect of the molecular sieve reaches its peak.
The thickness of the hygroscopic layer 12 is determined in consideration of applications and the like, and is preferably 20 to 80 μm, and more preferably 30 to 60 μm, for example. If the thickness of the hygroscopic layer 12 is less than the preferred lower limit value, it may be difficult to obtain a sufficient hygroscopic effect, and if it exceeds the preferred upper limit value, depending on the content of the molecular sieve, there is a risk of promoting the peak of the hygroscopic effect. .

Examples of the material for forming the seal layer 13 include the same materials as the material for forming the laminate layer 11. Among these, polyethylene is preferable, and LDPE and LLDPE are more preferable.
The thickness of the seal layer 13 is preferably 5 to 20 μm, for example, and more preferably 5 to 10 μm. If the thickness of the seal layer 13 is less than the preferred lower limit, the seal strength may be reduced and the sealing performance may be reduced. If it exceeds the preferable upper limit value, moisture may be hardly absorbed by the hygroscopic layer 12.

≪Water vapor barrier layer of hygroscopic laminated film≫
In the present invention, the “water vapor barrier layer” refers to a layer having a moisture permeability of 1.0 g / (m ² · 24 hr) or less. The moisture permeability of the water vapor barrier layer is preferably 0.5 g / (m ² · 24 hr) or less, more preferably 0.2 g / (m ² · 24 hr) or less. If the moisture permeability of the water vapor barrier layer exceeds the preferable upper limit value, the moisture absorption capacity of the hygroscopic laminated film may be reduced when it comes into contact with the outside air.
In the present invention, “moisture permeability” is measured by a method according to JIS K 7126.
The hygroscopic laminated film 1 is provided with the water vapor barrier layer 20, so that it is difficult to transmit moisture even when it blocks outside air or comes into contact with the outside air, thereby improving moisture resistance.
The thickness of the water vapor barrier layer 20 is determined in consideration of the configuration of the hygroscopic laminated film 1, and is preferably 12 to 60 μm, and more preferably 15 to 45 μm. If the thickness of the water vapor barrier layer 20 is less than the preferred lower limit value, the moisture resistance of the hygroscopic laminated film 1 may be reduced, and if it exceeds the preferred upper limit value, the flexibility of the hygroscopic laminated film 1 may be impaired.

The layer structure of the water vapor barrier layer 20 is not particularly limited, and may be a one-layer structure, a two-layer structure, or a three-layer structure or more. Among these, a two-layer structure and a three-layer structure are preferable, and a two-layer structure is more preferable.
Moreover, it is preferable that the water vapor barrier layer 20 has a water vapor barrier property and a dead fold property.

  When the water vapor barrier layer 20 has a two-layer structure, examples of the layer structure include a two-layer structure (a) of a base material layer and a film layer having both deadfold properties and water vapor barrier properties. Or the two-layer structure (b) of the film layer which has a deadfold property and serves as a base material layer, and the film layer which has water vapor | steam barrier property is mentioned.

For the two-layer structure (a):
Materials for forming the base material layer include polyethylene terephthalate (PET) such as biaxially stretched polyethylene terephthalate, polybutylene terephthalate (PBT) such as biaxially stretched polybutylene terephthalate; biaxially stretched polypropylene (OPP), unstretched polypropylene ( CPP), high density polyethylene (HDPE), polyolefin such as medium density polyethylene (MDPE), and polyamide (PA) such as biaxially stretched polyamide. Among these, PET, PBT, polypropylene, and PA are preferable, and biaxially stretched PET, biaxially stretched PBT, OPP, and biaxially stretched PA are more preferable.
The thickness of the base material layer is determined in consideration of the material and the configuration of the hygroscopic laminated film 1, and is preferably 5 to 30 μm, and more preferably 12 to 20 μm. If the thickness of the base material layer is less than the preferred lower limit value, the strength of the hygroscopic laminated film 1 may be reduced. If the thickness exceeds the preferred upper limit value, the flexibility of the hygroscopic laminated film 1 is impaired and handling becomes complicated. There is a fear.
Examples of the material for forming a film layer having both deadfold properties and water vapor barrier properties include aluminum (AL) foil and aluminum alloy foil.
The thickness of the film layer having both the deadfold property and the water vapor barrier property is preferably 7 to 20 μm, and more preferably 7 to 9 μm, for example. If the thickness of the film layer having both of these characteristics is less than the preferred lower limit, the deadfold property and moisture resistance of the hygroscopic laminated film 1 may be insufficient, and if it exceeds the preferred upper limit, the flexibility of the hygroscopic laminated film 1 may be insufficient. May be impaired and handling may be complicated.

For the two-layer structure (b):
Examples of a material for forming a film layer having a deadfold property and also serving as a base material layer include polybutylene terephthalate (PBT) such as biaxially stretched polybutylene terephthalate, cellophane, and the like.
The thickness of the film layer that has deadfold properties and also serves as the base material layer is preferably, for example, 10 to 30 μm, and more preferably 10 to 20 μm. If the thickness of the film layer is less than the preferred lower limit, the strength of the hygroscopic laminated film 1 may be reduced, and if it exceeds the preferred upper limit, the flexibility of the hygroscopic laminated film 1 is impaired and handling becomes complicated. There is a fear.
Examples of a material for forming a film layer having a water vapor barrier property (water vapor barrier film layer) include an AL foil, a vapor-deposited PET film, a vapor-deposited polypropylene film, a polyvinylidene chloride (PVDC) film, and a PVDC coat film. Of these, AL foil and vapor-deposited PET film are preferable.
The thickness of the water vapor barrier film layer is determined in consideration of the material and the configuration of the hygroscopic laminated film 1, and is preferably 5 to 30 μm, and more preferably 12 to 20 μm. If the thickness of the water vapor barrier film layer is less than the preferred lower limit value, the moisture resistance of the hygroscopic laminated film 1 may be reduced, and if it exceeds the preferred upper limit value, it is difficult to ensure the thickness of other layers.

When the water vapor barrier layer 20 has a three-layer structure, the layer structure includes, for example, a base material layer, a film layer having a dead fold property (dead fold film layer), and a film layer having a water vapor barrier property (water vapor) And a three-layer structure provided individually with a barrier film layer).
In this case, examples of the material for forming the base material layer include the same materials as those for forming the base material layer in the above-described two-layer structure (a).
For example, the thickness of the base material layer is preferably 5 to 30 μm, and more preferably 12 to 20 μm.
Examples of the material for forming the deadfold film layer include AL foil, PBT, and cellophane.
The thickness of the deadfolding film layer is determined in consideration of the material, the configuration of the hygroscopic laminated film 1, and the like, and is preferably 7 to 30 μm, and more preferably 7 to 20 μm, for example. If the thickness of the deadfold film layer is less than the preferred lower limit value, the deadfold property is insufficient and the hygroscopic ability of the hygroscopic laminate film 1 may be reduced. May be impaired and handling may be complicated.
Examples of the material for forming the water vapor barrier film layer include the same materials as those for forming the water vapor barrier film layer in the two-layer structure (b) described above.
The thickness of the water vapor barrier film layer is determined in consideration of the material and the configuration of the hygroscopic laminated film 1, and is preferably 5 to 30 μm, and more preferably 12 to 20 μm.

  When the water vapor barrier layer 20 has a single layer structure, the one layer preferably has a water vapor barrier property and a deadfold property, and is a film layer that also serves as a base material layer.

A hygroscopic laminated film is manufactured according to a conventionally well-known manufacturing method. An example of the manufacturing method of a hygroscopic laminated film is demonstrated below.
The manufacturing method of the hygroscopic laminated film 1 of this embodiment includes the step of obtaining the sealant layer 10 (sealant layer production step), the step of obtaining the water vapor barrier layer 20 (water vapor barrier layer production step), the sealant layer 10 and the water vapor barrier. A step of laminating the layer 20 (lamination step).
The method for obtaining the sealant layer 10 in the sealant layer manufacturing process is selected from conventionally known methods according to the material and configuration of the layer. For example, a method of forming a laminate of a laminate layer 11, a hygroscopic layer 12 to which a molecular sieve is added, and a seal layer 13 by a coextrusion method using a T-die coextrusion machine, an inflation coextrusion machine, or the like can be given. It is done.
The method for obtaining the water vapor barrier layer 20 in the water vapor barrier layer production process is selected from conventionally known methods according to the material and configuration of the layer. For example, the method of manufacturing a laminated body by adhesion | attachment or vapor deposition is mentioned.
As a method of laminating the sealant layer 10 and the water vapor barrier layer 20 in the laminating step, for example, the sealant layer 10 and the water vapor barrier layer 20 are overlapped so that the laminate layer 11 and the water vapor barrier layer 20 are in contact with each other. The method of heating while pressing is mentioned.

  For example, the roll body 100 of the hygroscopic laminated film 1 can be obtained by using a winder for the hygroscopic laminated film 1 obtained by the above-described manufacturing method, and a core tube (for example, a paper tube or resin having an inner diameter of about 3 inches). It can be obtained by winding a tube or the like while maintaining a constant tension (preferably 60 to 100 N).

(Exterior body)
The exterior body 200 in FIG. 1 includes a moisture barrier exterior film having a water vapor barrier layer and having a deadfold property.

<Moisture-proof exterior film>
FIG. 4 shows an embodiment of a moisture-proof exterior film.
The moisture-proof exterior film 2 of FIG. 4 includes a sealant layer 30 and a water vapor barrier layer 40 provided on one surface 30a of the sealant layer 30.
The thickness t2 of the moisture-proof exterior film 2 is preferably 15 to 80 μm, and more preferably 15 to 50 μm. If the thickness t2 of the moisture-proof exterior film 2 is less than the preferred lower limit, the moisture-proof property may be reduced, and if it exceeds the preferred upper limit, the flexibility of the moisture-proof exterior film 2 may be impaired and handling may be complicated. is there.

The moisture-proof exterior film 2 has deadfold property in the whole film. Thereby, when the roll body of the said hygroscopic laminated | multilayer film is subjected to a vacuum packaging process using the moisture-proof exterior film 2 and stored, it becomes difficult to generate a gap between the roll body and the moisture-proof exterior film 2.
In the moisture-proof exterior film 2, the distance between the opposite sides in the above-described deadfold property test is preferably 10 mm or less, more preferably 5 mm or less. The dead fold property of the moisture-proof exterior film 2 can be controlled by selecting the layer configuration or the material of each layer.

≪Sealant layer of moisture-proof exterior film≫
The sealant layer 30 in the moisture-proof exterior film 2 of FIG. 4 has a single-layer structure, and the moisture-proof exterior film 2 includes the sealant layer 30 to have a sealing property.
The thickness of the sealant layer 30 is determined in consideration of the configuration of the moisture-proof exterior film 2 and the like, and is preferably 20 to 50 μm, for example, and more preferably 25 to 30 μm. If the thickness of the sealant layer 30 is less than the preferable lower limit value, the adhesion between the sealant layer 30 and the water vapor barrier layer 40 may be deteriorated. If the thickness exceeds the preferable upper limit value, the flexibility of the moisture-proof exterior film 2 may be impaired. There is.
Examples of the material for forming the sealant layer 30 include the same materials as those for forming the seal layer 13 in the sealant layer of the hygroscopic laminated film, and among them, polyethylene is preferable.

≪Water vapor barrier layer of moisture-proof exterior film≫
The water vapor barrier layer of the moisture-proof exterior film has a moisture permeability of 1.0 g / (m ² · 24 hr) or less, preferably 0.5 g / (m ² · 24 hr) or less, more preferably 0.2 g. / (M ² · 24 hr) or less. When the moisture permeability of the water vapor barrier layer exceeds the preferable upper limit value, it is difficult to obtain sufficient moisture resistance.
The moisture-proof exterior film 2 is provided with the water vapor barrier layer 40, so that it is difficult to transmit moisture even when the outside air is blocked or in contact with the outside air.
The thickness of the water vapor barrier layer 40 is determined in consideration of the configuration of the moisture-proof exterior film 2 and the like, and is preferably 10 to 50 μm, for example, and more preferably 15 to 35 μm.
If the thickness of the water vapor barrier layer 40 is less than the preferred lower limit value, the moisture resistance of the moisture-proof exterior film 2 may be reduced, and if it exceeds the preferred upper limit value, the flexibility of the moisture-proof exterior film 2 may be impaired.

The layer structure of the water vapor barrier layer 40 is not particularly limited, and may be a one-layer structure, a two-layer structure, or a structure of three or more layers. Among these, a one-layer structure, a two-layer structure, and a three-layer structure are preferable, and a two-layer structure is more preferable.
In addition, the water vapor barrier layer 40 preferably has a water vapor barrier property and a dead fold property.
Specific examples of the layer configuration of the water vapor barrier layer 40 include the same layer configuration as the water vapor barrier layer 20 of the hygroscopic laminated film 1 described above. Among these, a two-layer structure is preferable, and a two-layer structure (a) and a two-layer structure (b) are more preferable.
The material forming each layer and the thickness of each layer are also the same as those in the water vapor barrier layer 20 of the hygroscopic laminated film 1 described above.

  The moisture-proof exterior film 2 is manufactured according to a conventionally known manufacturing method, and can be obtained by, for example, manufacturing in the same manner as the manufacturing method of the hygroscopic laminated film described above. And the obtained moisture-proof exterior film can be used as an exterior body, for example by shape | molding in a bag shape.

(Method for producing film roll package)
The film roll packaging body 300 of FIG. 1 accommodates, for example, the roll body 100 of the hygroscopic laminated film 1 in an exterior body 200 in which the moisture-proof exterior film 2 is formed in a bag shape, and is packaged under reduced pressure to seal the exterior body 200. Can be obtained.
The decompression conditions for packaging under reduced pressure are preferably such that the degree of decompression is 300 mmHg (4.00 × 10 ⁴ Pa) or less, and more preferably 100 mmHg (1.33 × 10 ⁴ Pa) or less. If such pressure reduction conditions are equal to or less than the preferable upper limit value, it is difficult for a gap to be formed between the roll body 100 and the exterior body 200, and entry of outside air into the roll body 100 is further prevented.

As described above, according to the film roll packaging body 300 of the present embodiment, since the roll body 100 is packaged under reduced pressure by the exterior body 200, the moisture present in the exterior body 200 is extremely small.
Moreover, since the moisture-proof exterior film 2 has deadfold property, the shape of the pressure-reduced state is hold | maintained, external air cannot flow into the exterior body 200 easily, and the inside of the exterior body 200 can be pressure-reduced favorably. In addition, since the moisture-proof exterior film 2 constituting the exterior body 200 includes the water vapor barrier layer 40, the moisture-proof exterior film 2 has moisture resistance and prevents moisture from entering from the outside. From this, while the roll body 100 is packaged with the exterior body 200 (distribution process, storage, etc.), the hygroscopic laminated film 1 constituting the roll body 100 is maintained without deterioration of its hygroscopic capacity. .
And since the hygroscopic laminated | multilayer film 1 also has deadfold property, the hygroscopic laminated | multilayer film 1 cannot change easily, and films have adhered. As a result, the roll body 100 is difficult to loosen, and even when the roll body 100 is taken out from the exterior body 200 under reduced pressure (during molding in the factory, filling with chemicals, etc.), outside air enters from the end face of the roll body 100. Is prevented.
The hygroscopic laminated film 1 drawn out from the roll body 100 in the film roll packaging body 300 exhibits a good hygroscopic effect even after being applied to a packaging material such as a container for containing food or medicine.

(Other embodiments)
The present invention is not limited to the embodiment described above.
The sealant layer 10 of the hygroscopic laminated film 1 shown in FIG. 3 has a three-layer structure, but is not limited to this embodiment, and contains a molecular sieve, preferably hygroscopicity, sealability, and adhesion between the water vapor barrier layer. Anything that has both. For example, the sealant layer of the hygroscopic laminated film may have a one-layer structure, a two-layer structure, or a structure with four or more layers. Among these, a three-layer structure as shown in FIG. 3 is preferable.

  Although the moisture-proof exterior film 2 shown in FIG. 4 is provided with the sealant layer 30, it is not limited to this embodiment, What is necessary is just to be able to seal an exterior body, accommodating a roll body and maintaining a pressure-reduced state. For example, the moisture-proof exterior film may not have a sealant layer, and in this case, when the roll body is packaged with the exterior body, the pressure-reduced state is obtained by bonding the peripheral ends of the moisture-proof exterior film with an adhesive or the like. Can be maintained.

  EXAMPLES Hereinafter, although an Example is shown and this invention is demonstrated, this invention is not limited to a following example.

(Production Example 1) Manufacture of water vapor barrier layer I of hygroscopic laminated film 12 μm thick PET (emblet, manufactured by Unitika Ltd.) layer and 7 μm thick AL foil (AL foil, manufactured by Nippon Metal Foil Industry Co., Ltd.) ) Layers were produced by conventional methods, and both were bonded using an adhesive (Takelac A, manufactured by Mitsui Chemicals, Inc.) to obtain a water vapor barrier layer I.
With respect to the AL foil layer having a thickness of 7 μm, the moisture permeability is less than 0.1 g / (m ² · 24 hr), and the distance between opposing sides in the above-described deadfold test is 1 mm.

(Production Example 2) Manufacture of water vapor barrier layer II of hygroscopic laminated film 20 μm thick PBT (Star Plastic Industry Co., Ltd.) layer and 12 μm thick aluminum vapor deposited PET (VM-PET, manufactured by Toray Film Processing Co., Ltd.) ) Layer was produced by a conventional method, and both were bonded using an adhesive (Takelac A, manufactured by Mitsui Chemicals, Inc.) to obtain a water vapor barrier layer II.
The moisture vapor transmission rate of the 12 μm thick aluminum vapor-deposited PET layer is 0.7 g / (m ² · 24 hr); for the 20 μm thick PBT layer, the distance between opposite sides in the above-described deadfold test Is 6 mm.

(Production Example 3) Manufacture of water vapor barrier layer III of hygroscopic laminated film 20 μm thick OPP (pyrene film-OT, manufactured by Toyobo Co., Ltd.) layer and 7 μm thick AL foil (AL foil, Nippon Metal Foil Industry Co., Ltd.) (Manufactured by the company) layers were manufactured by ordinary methods, and both were bonded using an adhesive (Takelac A, manufactured by Mitsui Chemicals, Inc.) to obtain a water vapor barrier layer III.
With respect to the AL foil layer having a thickness of 7 μm, the moisture permeability is less than 0.1 g / (m ² · 24 hr), and the distance between opposing sides in the above-described deadfold test is 1 mm.

(Production Example 4) Manufacture of water vapor barrier layer IV of hygroscopic laminated film 12 μm thick PET (Embret, manufactured by Unitika Ltd.) layer, 20 μm thick cellophane (PL, manufactured by Phutamura Chemical Co., Ltd.) layer, An aluminum vapor-deposited PET (VM-PET, manufactured by Toray Film Processing Co., Ltd.) layer having a thickness of 12 μm was produced by a conventional method.
First, a 12 μm thick PET layer and a 20 μm thick cellophane layer were bonded using an adhesive (Takelac A, manufactured by Mitsui Chemicals, Inc.). Next, an aluminum vapor-deposited PET layer having a thickness of 12 μm is adhered to the surface of the cellophane layer opposite to the PET layer bonding surface using an adhesive (Takelac A, manufactured by Mitsui Chemicals), and a water vapor barrier layer IV was obtained.
The moisture vapor transmission rate of the 12 μm thick aluminum vapor-deposited PET layer is 0.7 g / (m ² · 24 hr); with respect to the cellophane layer having a thickness of 20 μm, the distance between opposite sides in the above-described deadfold test. Is 5 mm.

(Production Example 5) Manufacture of water vapor barrier layer V of hygroscopic laminated film 12 μm thick PET (Embret, manufactured by Unitika Ltd.) layer and 12 μm thick aluminum vapor-deposited PET (VM-PET, Toray Film Processing Co., Ltd.) Manufactured by a conventional method, and both were bonded using an adhesive (Takelac A, manufactured by Mitsui Chemicals, Inc.) to obtain a water vapor barrier layer V.
The moisture vapor transmission rate of the 12 μm thick aluminum vapor-deposited PET layer is 0.7 g / (m ² · 24 hr).

(Production Example 6) Manufacture of water vapor barrier layer VI of hygroscopic laminated film 12 μm thick PET (Embret, manufactured by Unitika Ltd.) layer, 20 μm thick cellophane (PL, manufactured by Phutamura Chemical Co., Ltd.) layer, Were manufactured by a conventional method, and both were bonded using an adhesive (Takelac A, manufactured by Mitsui Chemicals, Inc.) to obtain a water vapor barrier layer VI.
With respect to the cellophane layer having a thickness of 20 μm, the distance between opposing sides in the above-described deadfold test is 5 mm.

(Manufacture example 7) Manufacture of sealant layer I of a hygroscopic laminated film 90 parts by mass of PE (Novatec, manufactured by Nippon Polyethylene Co., Ltd.) and 10 parts by mass of molecular sieve (Molecular sieve, manufactured by Union Showa Co., Ltd.) were mixed. The material constituting the hygroscopic layer was used.
Subsequently, a multilayer film having a three-layer structure was prepared by coextrusion so that the laminate layer / the hygroscopic layer / the seal layer was 10 μm PE / 30 μm PE (containing 10% by mass of molecular sieve) / 10 μm PE.

(Manufacture example 8) Manufacture of sealant layer II of a hygroscopic laminated film 95 parts by mass of PE (Novatech, manufactured by Nippon Polyethylene Co., Ltd.) and 5 parts by mass of molecular sieve (Molecular sieve, manufactured by Union Showa Co., Ltd.) are mixed. The material constituting the hygroscopic layer was used.
Subsequently, a multilayer film having a three-layer structure was prepared by a coextrusion method so that the laminate layer / the hygroscopic layer / the seal layer was 10 μm PE / 30 μm PE (containing 5% by mass of molecular sieve) / 10 μm PE.

(Manufacture example 9) Manufacture of sealant layer III of a hygroscopic laminated film 90 parts by mass of PE (Novatec, manufactured by Nippon Polyethylene Co., Ltd.) and 10 parts by mass of molecular sieve (Molecular sieve, manufactured by Union Showa Co., Ltd.) were mixed. The material constituting the hygroscopic layer was used.
Next, a multilayer film having a three-layer structure was prepared by a coextrusion method so that the laminate layer / hygroscopic layer / seal layer was 10 μm PE / 50 μm PE (containing 10% by mass of molecular sieve) / 10 μm PE.

(Manufacture example 10) Manufacture of moisture-proof exterior film I 12-micrometer-thick PET (emblet, manufactured by Unitika Ltd.) layer, 7-micrometer-thick AL foil (AL foil, manufactured by Nippon Metal Foil Industry Co., Ltd.) layer, A PE (HR, manufactured by KEF Film Co., Ltd.) layer having a thickness of 30 μm was produced by a conventional method.
First, a PET layer having a thickness of 12 μm and an AL foil layer having a thickness of 7 μm were bonded using an adhesive (Takelac A, manufactured by Mitsui Chemicals, Inc.). Next, a 30 μm thick PE layer (sealant layer) is bonded to the surface of the AL foil layer opposite to the PET layer bonding surface using an adhesive (Takelac A, manufactured by Mitsui Chemicals). A moisture-proof exterior film I was obtained.
With respect to the AL foil layer having a thickness of 7 μm, the moisture permeability is less than 0.1 g / (m ² · 24 hr), and the distance between opposing sides in the above-described deadfold test is 1 mm.

(Manufacture example 11) Manufacture of moisture-proof exterior film II A 20-micrometer-thick PBT (Star Plastic Industry Co., Ltd.) layer, 12-micrometer-thick aluminum vapor deposition PET (VM-PET, Toray Film Processing Co., Ltd.) layer A PE (HR, manufactured by KEF Film Co., Ltd.) layer having a thickness of 30 μm was produced by a conventional method.
First, a 20 μm thick PBT layer and a 12 μm thick aluminum vapor-deposited PET layer were bonded using an adhesive (Takelac A, manufactured by Mitsui Chemicals, Inc.). Next, a 30 μm thick PE layer (sealant layer) is bonded to the surface opposite to the PBT layer bonding surface of the aluminum deposited PET layer using an adhesive (Takelac A, manufactured by Mitsui Chemicals, Inc.). A moisture-proof exterior film II was obtained.
The moisture vapor transmission rate of the 12 μm thick aluminum vapor-deposited PET layer is 0.7 g / (m ² · 24 hr); for the 20 μm thick PBT layer, the distance between opposite sides in the above-described deadfold test Is 6 mm.

(Manufacture example 12) Manufacture of moisture-proof exterior film III 12-micrometer-thick PET (emblet, manufactured by Unitika Ltd.) layer, 7-micrometer-thick AL foil (AL foil, manufactured by Nippon Metal Foil Industry Co., Ltd.) layer, Were each manufactured by a conventional method, and both were bonded using an adhesive (Takelac A, manufactured by Mitsui Chemicals, Inc.) to obtain a moisture-proof exterior film III.
With respect to the AL foil layer having a thickness of 7 μm, the moisture permeability is less than 0.1 g / (m ² · 24 hr), and the distance between opposing sides in the above-described deadfold test is 1 mm.

(Manufacture example 13) Manufacture of moisture-proof exterior film IV A 20 micrometer-thick cellophane (PL, made by Futamura Chemical Co., Ltd.) layer, and 12 micrometer-thick aluminum vapor deposition PET (VM-PET, Toray Film Processing Co., Ltd.) layer A 30 μm thick PE (HR, manufactured by KEF Film Co., Ltd.) layer was produced by a conventional method.
First, a cellophane layer having a thickness of 20 μm and an aluminum-deposited PET layer having a thickness of 12 μm were bonded using an adhesive (Takelac A, manufactured by Mitsui Chemicals, Inc.). Next, a PE layer (sealant layer) having a thickness of 30 μm is bonded to the surface of the aluminum-deposited PET layer opposite to the cellophane layer bonding surface using an adhesive (Takelac A, manufactured by Mitsui Chemicals, Inc.). A moisture-proof exterior film IV was obtained.
The moisture vapor transmission rate of the 12 μm thick aluminum vapor-deposited PET layer is 0.7 g / (m ² · 24 hr); with respect to the cellophane layer having a thickness of 20 μm, the distance between opposite sides in the above-described deadfold test. Is 5 mm.

(Manufacture example 14) Manufacture of moisture-proof exterior film V 12-micrometer-thick PET (emblet, manufactured by Unitika Co., Ltd.) layer, 12-micrometer-thick aluminum vapor-deposited PET (VM-PET, manufactured by Toray Film Processing Co., Ltd.) layer, A 30 μm thick PE (HR, manufactured by KEF Film Co., Ltd.) layer was produced by a conventional method.
First, a 12 μm thick PET layer and a 12 μm thick aluminum vapor deposited PET layer were bonded using an adhesive (Takelac A, manufactured by Mitsui Chemicals, Inc.). Next, a 30 μm thick PE layer (sealant layer) is bonded to the surface of the aluminum-deposited PET layer opposite to the PET layer bonding surface using an adhesive (Takelac A, manufactured by Mitsui Chemicals, Inc.). A moisture-proof exterior film V was obtained.
The moisture vapor transmission rate of the 12 μm thick aluminum vapor-deposited PET layer is 0.7 g / (m ² · 24 hr).

(Manufacture example 15) Manufacture of moisture-proof exterior film VI A 12-micrometer-thick PET (emblet, manufactured by Unitika Co., Ltd.) layer and a 30-micrometer-thick PE (HR, manufactured by KEF Film Co., Ltd.) layer are always used It manufactured by the method, and both were adhere | attached using the adhesive agent (Takelac A, Mitsui Chemicals, Inc.), and this was set as the moisture proof exterior film VI.

(Manufacture example 16) Manufacture of moisture-proof exterior film VII 12-micrometer-thick PET (emblet, made by Unitika Co., Ltd.) layer, 20-micrometer-thick cellophane (PL, made by Futamura Chemical Co., Ltd.) layer, and 30-micrometer-thick A PE (HR, manufactured by KEF Film Co., Ltd.) layer was produced by a conventional method.
First, a 12 μm thick PET layer and a 20 μm thick cellophane layer were bonded using an adhesive (Takelac A, manufactured by Mitsui Chemicals, Inc.). Next, a 30 μm thick PE layer (sealant layer) is bonded to the surface of the cellophane layer opposite to the PET layer bonding surface using an adhesive (Takelac A, manufactured by Mitsui Chemicals, Inc.) to prevent moisture. The characteristic exterior film VII was obtained.
With respect to the cellophane layer having a thickness of 20 μm, the distance between opposing sides in the above-described deadfold test is 5 mm.

Example 1
According to the structure shown in Table 1, the film roll package was manufactured as follows.
That is, using a dry laminator (manufactured by Okazaki Kikai Kogyo Co., Ltd.), an adhesive agent (Takelac) is used so that the laminate layer and the film layer having water vapor barrier properties come into contact with each other. A, and a hygroscopic laminated film having a width of 0.8 m was obtained.
Using the winder (rewinding inspection machine, manufactured by Gravure Service Equipment Co., Ltd.), the resulting hygroscopic laminated film is subjected to constant tension (70 to 80 N) on the core tube (paper tube with an inner diameter of 76.5 mm). The roll body of the hygroscopic laminated | multilayer film was manufactured by winding up, maintaining this.
Separately, a moisture-proof exterior film I was formed into a bag shape with the base material layer being the outermost side by using a three-side seal automatic bag making machine (manufactured by Totani Giken Kogyo Co., Ltd.) to produce an exterior body.
Next, the roll body is housed in an exterior body, and is packaged under reduced pressure using a vacuum packaging machine (manufactured by TOSEI Co., Ltd.) under the decompression conditions (degree of decompression 100 mmHg) shown in Table 1, and the impulse seal built in the vacuum packaging machine Thus, the outer package was sealed to obtain a film roll package.

(Example 2)
A film roll package was produced in the same manner as in Example 1 except that the water vapor barrier layer I of the hygroscopic laminated film was changed to the water vapor barrier layer II.

Example 3
A film roll package was produced in the same manner as in Example 1 except that the sealant layer I was changed to the sealant layer II and the reduced pressure condition was changed from 100 mmHg to 30 mmHg.

Example 4
A film roll package was produced in the same manner as in Example 1 except that the depressurization condition was changed from 100 mmHg to 30 mmHg.

(Example 5)
A film roll package was produced in the same manner as in Example 1 except that the depressurization condition was changed from 100 mmHg to 300 mmHg.

(Example 6)
A film roll package was produced in the same manner as in Example 1 except that the moisture-proof exterior film I was changed to the moisture-proof exterior film II.

(Example 7)
A film roll package was produced in the same manner as in Example 1 except that the water vapor barrier layer I of the hygroscopic laminated film was changed to the water vapor barrier layer III and the sealant layer I was changed to the sealant layer III.

(Example 8)
A roll body of a hygroscopic laminated film was produced in the same manner as in Example 1 except that the water vapor barrier layer I of the hygroscopic laminated film was changed to the water vapor barrier layer IV.
Separately, the moisture-proof exterior film III was molded into a bag shape with the base material layer as the outermost side using a three-side seal automatic bag making machine (manufactured by Totani Giken Kogyo Co., Ltd.) to produce an exterior body.
Next, the roll body is housed in the exterior body, and is vacuum-packed using a vacuum packaging machine (manufactured by TOSEI Co., Ltd.) under the reduced pressure conditions (decompression degree 100 mmHg) shown in Table 1, and the exterior body is sealed with an adhesive tape. A film roll package was obtained.

Example 9
A film roll package was produced in the same manner as in Example 1 except that the moisture-proof exterior film I was changed to the moisture-proof exterior film IV.

(Comparative Example 1)
A film roll package was produced in the same manner as in Example 1 except that the water vapor barrier layer I of the hygroscopic laminated film was changed to the water vapor barrier layer V.

(Comparative Example 2)
A film roll package was produced in the same manner as in Example 1 except that the moisture-proof exterior film I was changed to the moisture-proof exterior film V.

(Comparative Example 3)
A film roll package was produced in the same manner as in Example 1 except that the moisture-proof exterior film I was changed to the moisture-proof exterior film VI.

(Comparative Example 4)
A film roll package was produced in the same manner as in Example 1 except that the water vapor barrier layer I of the hygroscopic laminated film was changed to the water vapor barrier layer VI.

(Comparative Example 5)
A film roll package was produced in the same manner as in Example 1 except that the moisture-proof exterior film I was changed to the moisture-proof exterior film VII.

(Evaluation method)
In each example, the deadfold property about a hygroscopic laminated | multilayer film and a moisture-proof exterior film was evaluated, respectively, and the result is shown in Table 1.
Moreover, about the obtained film roll package of each example, the adhesiveness of a roll body and the maintenance property of the hygroscopic capability of a hygroscopic laminated film are evaluated, and the result is shown in Table 1.

<Evaluation of deadfold property for each film>
A 10 cm × 10 cm rectangular film was prepared, and the film was folded in two by placing a flat plate (12.5 cm × 8 cm) with a load of 500 g so that the opposing sides were aligned. At this time, the flat plate was placed so as to cover the film. After placing the flat plate for 30 seconds, the distance between the opposite sides when the flat plate was removed was measured.
The film in which this distance remained within 10 mm was judged to have deadfold properties.

<Evaluation about adhesion degree of roll body>
When packaging the roll body of a hygroscopic laminated film with an exterior body, the space between the roll body and the exterior body was packaged under reduced pressure (mmHg) shown in Table 1 and allowed to stand for 24 hours.
And the external appearance of the roll body after standing for 24 hours was observed, and the adhesion degree of the roll body was evaluated based on the following evaluation criteria.
Evaluation criteria ○: No intrusion of air between the hygroscopic laminated films, and the films were in close contact with each other.
Δ: Air slightly entered between the hygroscopic laminated films, and the film was slightly swollen.
X: Air entered between the hygroscopic laminated films, and bulges were observed at several locations on the roll body.

<Evaluation about the maintenance of the hygroscopic ability of the hygroscopic laminated film>
When packaging the roll body of a hygroscopic laminated film with an exterior body, the space between the roll body and the exterior body was packaged under reduced pressure as shown in Table 1. Subsequently, the roll body was taken out from the state packaged in the exterior body and allowed to stand for 5 hours. And 5 hours after this, the moisture penetration | invasion degree in the roll body end surface was measured.
In this evaluation, the external appearance of the hygroscopic laminated film side end portion changes from an opaque external appearance to a transparent external appearance due to moisture absorption after standing for 5 hours.
The moisture penetration degree at the roll body end surface means the degree of spread of the transparent part at the hygroscopic laminated film side end, and the distance from the hygroscopic laminated film side end of the transparent part to the roll body central direction (mm) ) As an index.
If this distance is 4 mm or less, a decrease in the hygroscopic capacity of the hygroscopic laminated film is not recognized, and it is determined that the hygroscopic laminated film maintains the hygroscopic capacity.
When this distance is more than 10 mm, it is determined that a significant decrease in the hygroscopic ability of the hygroscopic laminated film is observed.

From the results of Table 1, the film roll packaging bodies of Examples 1 to 9 to which the present invention is applied are hygroscopic laminated even in a state where they are taken out from the exterior body in addition to the state packaged in the exterior body. It can be confirmed that the moisture absorption capacity of the film is maintained.
Specifically, in the film roll package of Examples 1 to 9, the hygroscopic laminated film has a hygroscopic ability up to 5 hours after the roll of the hygroscopic laminated film is taken out from the state packaged in the outer package. The rate of decrease was 10% or less.

In the film roll package of Comparative Example 1, since the hygroscopic laminated film does not have a deadfold property, it is considered that a gap is generated between the layers of the hygroscopic laminated film and the remaining air in the film roll package has entered.
In the film roll package of Comparative Example 2, since the moisture-proof exterior film has no deadfold property, a gap is generated between the roll body of the hygroscopic laminated film and the exterior body, and from the roll body end face of the hygroscopic laminated film. It is thought that the remaining air has entered.
In the film roll packaging body of Comparative Example 3, since the moisture-proof exterior film does not have a deadfold property, a gap is generated between the roll body and the exterior body of the hygroscopic laminated film, and residual air has entered from the end face of the roll body. ,it is conceivable that. In addition, since the moisture-proof exterior film of Comparative Example 3 has no water vapor barrier property and is inferior in moisture-proof property, it is considered that moisture has entered from the outside.
In the film roll package of Comparative Example 4, the cellophane used in the hygroscopic laminated film has no water vapor barrier property and is inferior in moisture resistance, so it is considered that moisture has entered from the outside.
In the film roll package of Comparative Example 5, the moisture-proof exterior film has no water vapor barrier property and is inferior in moisture resistance, so it is considered that moisture has entered from the outside.

1 hygroscopic laminated film,
2 moisture-proof exterior film,
10 sealant layer,
20 water vapor barrier layer,
30 sealant layer,
40 water vapor barrier layer,
100 roll body,
200 exterior body,
300 Film roll package.

Claims (6)

A roll body of a hygroscopic laminated film and an exterior body that accommodates the roll body,
The hygroscopic laminated film includes a sealant layer containing a molecular sieve, a water vapor barrier layer provided on one surface of the sealant layer, and has a deadfold property.
The outer package includes a moisture barrier film having a water vapor barrier layer and having a deadfold property,
The roll body is a film roll package that is packaged under reduced pressure by the exterior body.   The film roll package according to claim 1, wherein the water vapor barrier layer of the hygroscopic laminated film has a base material layer and a film layer having a water vapor barrier property provided on one surface of the base material layer.   The film roll packaging according to claim 2, wherein the water vapor barrier layer of the hygroscopic laminated film further includes a film layer having a deadfold property between the base material layer and the film layer having the water vapor barrier property. body. The sealant layer includes a laminate layer, a seal layer, and a hygroscopic layer provided between the laminate layer and the seal layer,
The laminate layer is adjacent to the water vapor barrier layer of the hygroscopic laminated film,
The film roll package according to any one of claims 1 to 3, wherein the hygroscopic layer contains a molecular sieve.   The water vapor barrier layer of the exterior body has a base material layer and a film layer having a water vapor barrier property provided on one surface of the base material layer, according to any one of claims 1 to 4. Film roll package.   The film roll packaging body according to claim 5, wherein the water vapor barrier layer of the outer package further includes a film layer having a deadfold property between the base material layer and the film layer having the water vapor barrier property.