TWI579211B - Polyvinyl alcohol based film package, method for storing the package and method for transporting the package - Google Patents

Description

Package of polyvinyl alcohol polymer film, storage method of package, and delivery method of package

The present invention relates to a package body and a method for storing or transporting the package body, the package system comprising a roll in which a polyvinyl alcohol polymer film is wound around a cylindrical core material by a packaging material.

Usually, the plastic film is stored or transported in a form in which a package formed by winding a roll formed on a cylindrical core material with a packaging material. By forming the package, it is possible to prevent deterioration of the appearance due to adhesion of water to the surface of the roll, or to prevent adverse effects on the physical properties of the film due to moisture absorption. In particular, a film of a polyvinyl alcohol-based polymer (hereinafter, a "polyvinyl alcohol-based polymer" is simply referred to as "PVA") which is a raw material of a polarizing film, is impregnated with moisture in a plastic film having high hygroscopicity. In the inside of the body, the quality of the film is lowered due to an increase in the moisture content of the film, or the quality of the water spot is reduced, and the processability is unstable and the productivity is lowered when the secondary product such as a polarizing film is processed. The problem. Therefore, among plastic films and the like which have a deterioration in quality due to moisture absorption, it is important to improve the protection against moisture caused by moisture condensation or moisture, and to store or transport them.

There are several known methods for packaging plastic film rolls using moisture-proof packaging materials.

For example, a method in which a PVA film is wound on a specific core material to form a film roll, and the film roll is packaged by a film having a moisture permeability of 10 g/m ² /day or less for storage or transportation (refer to Patent Document 1) ). Patent Document 1 discloses a packaging method in which a film roll is double-wound by a film for packaging, and a portion in the widthwise direction is inserted into the core material.

Further, it is conventionally to wind a hygroscopic film on a heart material and then package it with a packaging material containing a specific film (see Patent Document 2). Patent Document 2 discloses a packaging method in which a peripheral portion of a packaging film (packaging material) in a widthwise direction is inserted into a hollow portion of a tubular core material, and the suspension cover is inserted through the hollow portion of the core material. .

Further, it is a film roll package which has a film roll which is formed by winding a long strip-shaped film member after leaving the both ends of the core material around the core material; a packaging sheet, a film roll And a specific rubber belt for packaging, which fixes both side edges of the wrapping sheet of the coated film roll to both end portions of the core material (refer to Patent Document 3). In Patent Document 3, the both side edge portions (both end portions) refer to a portion where the packaging sheet is observed at a giant angle, and even if the packaging rubber belt is moved toward the longitudinal direction of the heart material, the packaging sheet is sufficiently fixed. The method is to arrange the rubber band for packaging at a portion from the edge of the packaging sheet. Therefore, in Patent Document 3, the edge of the packaging sheet is not fixed to both end portions of the core material and becomes a free end.

Prior technical literature Patent literature

Japanese Unexamined Patent Application Publication No. Publication No. JP-A No. No. Publication No. No. No. No. Publication No. JP-A

Recently, in the PVA film which is a raw material for a polarizing film for liquid crystal displays, as the size of the liquid crystal display has increased, a PVA film having a wider width has been sought, and the processability of the polarizing film has been sought. Productivity is improved, and a PVA film having a long winding length is also sought. With the widening of the PVA film, the lengthening of the winding length, and the increase in the weight of the roller, the roller is mostly used to insert the support rod into the interior of the core material during loading, unloading or moving on the gantry or the processing device. . Therefore, it is easy to insert the support rod into the inside of the core material, and it is not opened by closing the both ends of the cylindrical heart material with a lid or the like, and the inside of the heart material is exposed to the outside air, and the chance of transporting or storing the roller is gradually increased. Further, for the material of the cylindrical heart material, metal or carbon fiber reinforced plastic having high strength (such as bending rigidity) or a composite material thereof is gradually used.

However, in a cold winter area, if the package is moved from an unair-conditioned storage location to an air-conditioned processing plant, moisture condensation will occur on the surface of the package. In particular, as described above, since the weight of the roll is gradually increased, the increase in the heat capacity of the roll and the temperature change rate of the entire roll accompanying the decrease are more likely to cause moisture condensation. In addition, as described above, although the heart material of the metal or the carbon fiber reinforced plastic core material is gradually used as the weight of the roller increases, compared with the heart material of the paper, the metal material made of metal or plastic is used. Water vapor condensation is more likely to occur. Such condensation is particularly likely to occur in the inner wall surface of a cylindrical heart material in which the PVA film is easily affected by temperature. Therefore, as described in Patent Document 1, the portion that is excessive in the width direction of the packaging material is stuffed into the heart. In the case of the method of the material, when moisture condensation occurs on the surface of the package such as the inner wall surface of the cylindrical heart material, water from the condensation will permeate from the packaged material and the inner wall surface of the heart material into the package body. Ministry of the problem. On the other hand, in the method of inserting the suspension cover into the hollow portion of the heart material in the method described in Patent Document 2, the installation of the suspension cover prevents moisture condensation on the inner wall surface of the heart material, and The condensed water generated outside the inner wall of the heartwood is also difficult to penetrate into the inside of the package, but the following problem still occurs: in order to insert the support rod into the heart material and remove the suspension cover, moisture condensation will occur in the heart material. The inner wall, or the water from the condensation that occurs outside the inner wall of the heartwood, will move the surface of the packaging material, and water will penetrate the interior of the package from between the packaging material and the inner wall of the core material.

Therefore, an object of the present invention is to provide a package and a method of storing or transporting a package using the package, which is a water-condensed water even when moisture condensation occurs on the surface of a package such as an inner wall surface of a cylindrical heart material. It is also difficult to penetrate into the inside of the package.

As a result of continuous research in order to achieve the above object, the present inventors have found that the use of a packaging material packaging roll effectively prevents water from penetrating into the interior of the package by fixing the edge of the packaging material on the outer wall surface of the core material protruding portion; This insight is further continually researched to complete the present invention.

That is, the present invention is

[1] A package comprising a package formed by winding a PVA film on a cylindrical core material with a packaging material, the heart material Both end portions form a projection projecting from the edge surface of the roller, and at least a portion of the edge of the wrapping material has been fixed on the outer wall surface of the projection.

[2] The package of the above [1], wherein at least a part of the surface of the heart material is made of metal and/or plastic.

[3] The package of the above [1] or [2], wherein in the package, the inner wall surface of the core material has been exposed to outside air.

[4] The package according to any one of the above [1] to [3] wherein the width of the PVA film is 2.1 m or more.

[5] The package according to any one of the above [1] to [4] wherein the mass of the roller is 0.5 t or more.

[6] The package according to any one of [1] to [5] wherein, in the respective protrusions of the both, the edge of the wrapping material fixed on the outer wall surface of the protruding portion substantially continuously surrounds the protruding portion Outer wall.

[7] The package according to any one of [1] to [6] wherein, in the respective protruding portions of the both, the adhesive surface of the adhesive tape is connected to both the packaging material and the outer wall surface of the protruding portion. Adhesive tape is wrapped around the outer wall of the projection.

[8] The package according to any one of [1] to [7] wherein, in the respective protrusions of the both, the protruding portion is such that at least a part of the edge is fixed to the protruding portion by the clamping member The packaging material on the wall is intermediate and clamped along the outer wall of the projection.

[9] The package according to any one of the above [1] to [8] wherein the packaging material is a film having a water vapor permeability of 5 g/m ² /24 h or less.

[10] A method of storing a package, wherein the package according to any one of [1] to [9] is stored at 10 ° C or lower.

[11] A method of transporting a package, which is carried out by inserting a support rod into the inside of the core material of the package of any one of the above [1] to [9].

According to the package of the present invention, even if moisture condensation occurs on the surface of the package such as the inner wall surface of the cylindrical heart material, it is difficult for the water from the condensation to penetrate into the inside of the package.

[Formation for implementing the invention]

Hereinafter, the present invention will be described in detail.

The roll used in the present invention is obtained by winding a PVA film on a cylindrical heart material. Further, both end portions of the core material form protruding portions protruding from the edge surface of the roller. Fig. 1 is a schematic view showing an example of a roller used in the present invention. In the first drawing, the roller 1 is formed by winding a PVA film 3 on a cylindrical core material 2. The both side edge portions 4 of the cylindrical heart material 2 are respectively formed from the roll edge surface 5, and are formed with the projecting portion 6 which protrudes outward in the longitudinal direction of the heart material.

The type of the cylindrical heart material is not particularly limited, and examples thereof include a metal maker, a plastic maker, a paper maker, and a wooden person. In addition, it is also possible to use the core material of the following composite form: use of both metal and plastic, use of both metal and paper, use of plastic and paper, and the like. Among these, since the effect of the present invention is high and the effect of the present invention is more remarkable, it is preferably a metal and/or plastic core material; even if it is repeatedly used, it is hard to be affected by abrasion or the like, and more preferably a metal core material. The proportion of the quality of metal and plastic relative to the total mass of the cylindrical heartwood It is preferably 50% by mass or more, more preferably 80% by mass or more, further preferably 95% by mass or more, and particularly preferably 100% by mass.

As the metal, for example, iron, stainless steel, aluminum, or the like can be exemplified, and one of these may be used alone or two or more kinds may be used in combination. Among these, aluminum is preferred from the viewpoints of strength, light weight, and price.

Further, as the above-mentioned plastic, for example, polyvinyl chloride, polyvinylidene chloride, polyester, polycarbonate, polyamide, epoxy resin, polyurethane, polyurea, decane oxide can be exemplified. One type of these may be used alone or two or more types may be used in combination. Among these, polyvinyl chloride is preferred. From the viewpoint of strength and the like, the plastic is preferably a fiber reinforced plastic (FRP) such as carbon fiber reinforced plastic.

In the present invention, even if at least a part of the surface of the cylindrical heart material is made of a metal material such as metal and/or plastic which is prone to moisture condensation, it is difficult for the water from the condensation to penetrate into the inside of the package. Therefore, in the case of using such a heart material, the effects of the present invention are more significantly achieved. The material of the cylindrical core material is at least a part of the inner wall surface (preferably 50% or more of the inner wall surface area, more preferably 80% or more of the inner wall surface area), and the material is preferably metal and / or plastic, the material of the inner wall surface is preferably metal and / or plastic, and the surface material of the cylindrical heart material is further preferably metal and / or plastic.

The both ends of the cylindrical core material can form a protruding portion that protrudes from the edge surface of the roll, and the length of the cylindrical core material becomes longer than the width of the PVA film. The length of the cylindrical heart material is preferably in the range of 5 to 100 cm longer than the width of the PVA film to be described later, from the viewpoint of workability and the like, and more preferably It is preferably in the range of 10 to 45 cm in length, and further preferably in the range of 15 to 30 cm in length.

Although the diameter of the cylindrical heart material is not particularly limited, the outer diameter is preferably in the range of 50 to 800 mm, more preferably in the range of 80 to 500 mm, from the viewpoints of strength, workability, etc., and further preferably In the range of 100 to 300 mm, it is particularly preferably in the range of 150 to 250 mm.

Further, the thickness of the cylindrical heart material is preferably in the range of 2 to 50 mm, more preferably in the range of 3 to 20 mm, still more preferably in the range of 4 to 10 mm from the viewpoints of strength, workability and the like.

The roller used in the present invention is composed of a PVA film wound on a cylindrical heart material. Since the quality of the PVA film due to moisture absorption is greatly reduced, the effect of the present invention is remarkably achieved.

As the PVA system constituting the PVA film, a vinyl ester polymer obtained by saponifying a vinyl ester monomer can be used. Examples of the vinyl ester-based monomer include vinyl formate, vinyl acetate, vinyl propionate, vinyl valerate, vinyl laurate, vinyl stearate, vinyl benzoate, and trimethyl methacrylate. Among them, vinyl acetate, vinyl versatate, etc., among these, vinyl acetate is preferred.

Although the degree of polymerization of the PVA constituting the PVA film is based on the use of the PVA film or the like, it is preferably in the range of 500 to 9000, more preferably in the range of 1,500 to 7,000, still more preferably in the range of 1800 to 5,000. It is in the range of 2000 to 3000. In addition, the PVA degree of polymerization referred to in the present specification means the average degree of polymerization measured in accordance with the description of JIS K6726-1994.

Further, the degree of saponification of the PVA constituting the PVA film is also preferably 75 mol% or more, more preferably 85 mol% or more, further preferably 95 mol% or more, and particularly preferably 99, depending on the use of the PVA film or the like. More than Mole. In addition, the degree of saponification of PVA in the present specification means the total number of moles of a structural unit (typically a vinyl ester unit) which can be converted into a vinyl alcohol unit by saponification and a vinyl alcohol unit, and the PVA has The proportion of the number of moles of the vinyl alcohol unit (% by mole). The degree of saponification can be measured in accordance with the description of JIS K6726-1994.

If necessary, the PVA film may contain a plasticizer, a surfactant, a dichroic dye, or the like. The method for producing the PVA film is not particularly limited, and a PVA film formed by a conventional method such as a solution film forming method or a melt film forming method can be preferably used.

The thickness of the PVA film is not particularly limited, and is preferably in the range of 5 to 500 μm, more preferably in the range of 15 to 300 μm, still more preferably in the range of 20 to 100 μm.

The width of the PVA film is not particularly limited, but is preferably 2.1 m or more, more preferably 2.3 m or more, further preferably 2.6 m or more, particularly preferably 3 m or more, and more preferably 3.3 m or more. In the case of using a PVA film having such a width, although the length of the cylindrical heart material is longer than the width of the PVA film, water from the condensed water is likely to occur in a larger amount, but in the present invention, it is difficult to obtain water from the condensed water. The effect of the present invention is more significantly achieved by infiltrating the inside of the package and using a PVA film having the above width. Further, in the case where the film width is less than 2.1 m, in the case of secondary processing of the PVA film, the ratio of the trimming width becomes large with respect to the film width, which may cause a decrease in productivity. herein, The trimming refers to a portion that cannot be used as a product when the both ends of the PVA film are cut at a constant width during processing.

On the other hand, when the width of the PVA film is too wide, the width of the PVA film is preferably 8 m or less because of the decrease in handleability.

The length of the PVA film wound around the cylindrical core material is not particularly limited, but is preferably 1000 m or more, more preferably 2,000 m or more, still more preferably 3,000 m or more. In the case of less than 1000 m, it is not economical because the ratio of the total loss occurring in the portion where the winding start/winding of the roll is completed becomes large. On the other hand, although the upper limit of the length of the PVA film is not particularly limited, if it is too long, the quality or diameter of the roll will become too large, due to the operation of the gantry or the processing device during loading or unloading or moving. There is a tendency to become difficult, and the length of the PVA film is preferably 10,000 m or less.

The mass of the roll used in the present invention is preferably 0.5 t or more, more preferably 1.5 t or more, still more preferably 2.5 t or more. In the present invention, even if the mass is large and the roll is easily condensed by water and moisture, it is difficult for the water derived from the condensate to penetrate into the inside of the package. Therefore, the effect of the present invention is more significantly achieved by using the above-described rolls. However, if the quality of the roll is too large, the quality of the roll is preferably 5 t or less because the workability and the like are lowered.

The packaging system of the present invention is formed by packaging the above-mentioned rolls with a packaging material. Although the type of the packaging material is not particularly limited, for example, a laminate film in which aluminum is vapor-deposited to polyethylene terephthalate, a laminated film of polyester and aluminum foil and polyethylene, and agglomeration of vapor-deposited aluminum Laminated film of ester and polyethylene, laminated film of polyester and polyethylene of vapor-deposited glass, coated A laminated film of polypropylene and polyethylene which is obtained by dispersing polyvinylidene chloride, a polypropylene film, a high-density polyethylene film, a low-density polyethylene film, and the like. These packaging materials may be used singly or in combination of two or more. It is preferred to use two or more packaging materials having different functions. In a form in which two or more types are used in combination, for example, a roll is wrapped by one type of packaging material, and then it is further packaged from another by using a packaging material. In this case, it is preferable to use a packaging material which is not in contact with the surface of the roll, and it is preferable to use a high-density polyethylene film which is strong in staining or friction. The thickness of the packaging material which is not in contact with the surface of the roll is preferably in the range of 20 to 60 μm from the viewpoint of workability and the like.

On the other hand, as a packaging material in the case where one type of packaging material is used alone, or a packaging material which is in contact with the surface of the roller in the case where two or more kinds of packaging materials are used in combination, it is preferable to have excellent moisture resistance. A laminate film of aluminum vapor-deposited to polyethylene terephthalate, a laminated film of polyester and aluminum foil and polyethylene, a laminated film of aluminum-deposited polyester and polyethylene, and a polyester and polyethylene of vapor-deposited glass Laminated film. The thickness of the packaging material in contact with the surface of the roll is preferably in the range of 5 to 60 μm, more preferably in the range of 10 to 20 μm from the viewpoint of workability and the like.

The packaging material, preferably a packaging material in contact with the surface of the roller, is more effective in preventing the influence of water on the PVA film, and the water vapor transmission rate is preferably 5 g/m ² /24 h or less, more preferably 3 g / The film of m ² /24h or less is more preferably a film of 1.5 g/m ² /24h or less. In the present specification, the water vapor transmission rate means a water vapor permeability measured in accordance with the infrared sensing method (40 ° C, 90% RH) described in JIS K7129:2008.

The packaging method at the time of packaging the roll using the packaging material is not particularly limited, and for example, a sheet-like (for example, rectangular) packaging material which is not three-dimensionally processed is wound along the outer wall of the roll, and is taken from the edge of the roll. And squeezing the packaging material beyond the outer side in the longitudinal direction of the heart material, and then fixing the edge of the extruded packaging material on the outer wall surface of the core material protruding portion; after inserting the roller into the packaging material which has been three-dimensionally processed into a cylindrical shape, The roll edge surface is pressed to press the packaging material beyond the outer side in the longitudinal direction of the core material, and then the method of fixing the edge of the extruded packaging material on the outer wall surface of the core material protruding portion. In such a method, after extruding the excess packaging material, the edge portion of the extruded packaging material is cut, and the newly formed packaging material edge is fixed to the outer wall surface of the heart material protruding portion, due to the protruding portion. The desired position on the outer wall surface is easy to fix the edge of the packaging material, so it is preferable to squeeze the excess packaging material, and not to cut the edge portion, but to fix the edge of the extruded packaging material to the heart material. Outside the wall. Further, in the case where two or more kinds of packaging materials are used in combination, the excess portion of the first packaging material can be extruded, and then the edge of the extruded first packaging material is fixed to the outer wall surface of the heart material protruding portion, and then squeezed Pressing the excess of the second type of packaging material, and then fixing the edge of the extruded second packaging material to the outer wall surface of the core material protruding portion, or finishing the excess of the plurality of packaging materials and then pressing, and then The edge of the extruded packaging material is fixed to the outer wall surface of the heart material projection.

In the above packaging method, it is preferable that the sheet-shaped packaging material is wound along the outer wall of the roll, and then the packaging material that exceeds the outer side in the longitudinal direction of the core material is extruded from the edge surface of the roll, from the viewpoint of workability and the like. A method of securing the edge of the extruded packaging material on the outer wall of the heartwood projection. this In this case, the number of windings of each of the packaging materials is not particularly limited, and may be either a single layer winding or a multilayer winding such as double-layer winding. However, even if the packaging material is damaged by scratches or the like, Multilayer winding is also preferred because it can reduce its effects. Further, after the sheet-shaped packaging material is wound along the outer wall, the edge portion of the longitudinal direction of the heart material is fixed by an adhesive tape such as a plastic tape, a cloth tape or a paper tape, or the like, and the packaging material is integrally formed. In the case of a tubular shape, it is preferable since water can be prevented from infiltrating into the inside of the package more effectively.

Fig. 2 is a schematic view showing an example of a packaging method at the time of packaging a roll using a sheet-shaped packaging material. In the example of Fig. 2, first, as shown in (1) to (2) of Fig. 2, the sheet-like packaging material 11 is wound along the outer wall of the roll, and is further parallel to the heart material by a non-illustration. The edge portion 14 of the longitudinal direction is fixed by an adhesive tape or an adhesive or the like, and is formed into a cylindrical shape. Next, as shown in (2) to (3) of Fig. 2, the portion 15 which is beyond the outer side in the longitudinal direction of the core material is pressed from the roll edge surface 12 of the packaging material, so that the packaging material contacts the protrusions at both ends of the heart material. The outer wall portion of the portion 13 is fixed to the outer wall surface of the protruding portion 13 as will be described later. Further, when the bent portion or the like which is bent at the time of pressing the packaging material 11 is fixed to the outer wall surface of the protruding portion, it is possible to more effectively prevent water from penetrating into the inside of the package, which is preferable.

When the packaging roll is wrapped by a packaging material, in order to protect the PVA film from scratches or impacts, it is preferable to arrange the spacer inside the package and to a position adjacent to the edge surface of the roll. As the gasket, for example, a polystyrene gasket, a urethane gasket, or the like can be used.

Further, when the package is loaded on the transport stand or the like, in order not to scratch the packaging material in the vicinity of the edge surface of the roll, it is preferable to arrange the spacer outside the package and to be adjacent to the edge surface of the roll. As the gasket, for example, a wooden gasket, a corrugated paper gasket, or the like can be used.

In the package of the present invention, it is preferable that the inner wall surface of the cylindrical heart material is exposed to the outside air, and the support rod can be attached when the package is attached or detached to the gantry or the processing device or the moving package. It is preferable to insert the inside and operate; because the support rod can penetrate the inside of the heart material, it is better to be in the package body, and the inner wall surface of the cylindrical heart material is not exposed to the outside air. status.

In the present invention, it is important that at least a portion of the edge of the wrapping material is fixed to the outer wall surface of the above-mentioned projection. In the case where the edge of the packaging material is not fixed to the free end by the method of fixing the rubber tape for packaging described in Patent Document 3, the water stays in the vicinity of the edge of the packaging material for a long time, and the capillary phenomenon is used. The packaging material and the protrusion easily penetrate into the inside of the package. In the present invention, by fixing the edge of the packaging material to the outer wall surface of the protruding portion, even if the water from the condensation occurring on the inner wall surface of the core material moves toward the outer wall surface of the protruding portion, it does not stay in the packaging material for a long time. It is possible to quickly leave the package by dropping or the like near the edge, so that it is possible to effectively prevent water from penetrating into the inside of the package.

The edge of the packaging material fixed on the outer wall surface of the protruding portion (hereinafter referred to as "the fixed end on the outer wall surface") may be fixed in direct contact with the outer wall surface of the protruding portion, but may be fixed without direct contact. . An example of a form that is fixed without direct contact, for example, an example : a form in which an adhesive to be described later is fixed in the middle; or a case in which the edge of the loose portion of the packaging material is fixed to the outer wall surface of the protruding portion, and the packaging material is fixed in the middle and the like.

Even if the fixed end of the outer wall surface is only present on the outer wall of the projection, the package body or the like can be disposed such that the fixed end on the outer wall surface faces downward, and the water from the condensation generated on the inner wall surface of the core material can be prevented from infiltrating into the interior of the package. However, in the respective protruding portions of the two, if the fixing end of the outer wall surface is fixed approximately continuously around the outer wall of each protruding portion, since it is unnecessary to consider the orientation of the package body, it is possible to effectively prevent water from penetrating into the package body. It is better. Here, the term "semi-continuously surrounding" means substantially continuously surrounding the outer wall, for example, in a slack portion of the packaging material, or the like, and the fixed end on the outer wall may be present only in the discontinuous portion. In the outer wall of the protruding portion which surrounds the fixed end of the outer wall surface approximately continuously, with respect to the length of the outer wall (for the total length of the plurality of portions), there is no part of the outer wall of the fixed end of the outer wall The proportion of the length is preferably 10% or less, more preferably 5% or less, further preferably 1% or less, and particularly preferably 0%.

The fixing form of the fixing end on the outer wall surface of the outer wall surface of the protruding portion is not particularly limited. For example, it may be a form fixed by an adhesive tape; a form fixed by an adhesive; and fixed by melting of the packaging material. Form; a form fixed by a clamping member such as a rubber band; in the case where the diameter of the edge portion is smaller than the diameter of the edge portion, the cone-shaped core material is used, and the cone portion and the gasket are sandwiched between The shape of the fixed end on the outer wall surface, etc.; since it is more effective to prevent water from penetrating into the interior of the package, it is preferably fixed by an adhesive tape and/or fixed by an adhesive. From the point of view of operability or economy, it is better to adopt a form fixed by adhesive tape. Specific examples of the form fixed by the adhesive tape include, for example, a method in which the adhesive surface of the adhesive tape is connected to both the packaging material and the outer wall surface of the protruding portion in the respective protruding portions of the adhesive tape. The shape of the adhesive tape is wound around the wall. In this case, the adhesive tape is preferably wound around the outer wall of the projection for one week or more.

The adhesive tape preferably has flexibility and stretchability, and the vicinity of the edge of the packaging material is in close contact with the outer wall surface of the protruding portion. As the adhesive tape, for example, a paper adhesive tape, a cloth adhesive tape, a film adhesive tape, a special adhesive tape, and the like can be exemplified. Specifically, for example, cellophane tape, kraft paper adhesive tape, cloth adhesive tape, OPP adhesive tape, aluminum tape, vinyl tape, polyester tape, polyethylene tape, polypropylene tape, polyimide tape, rubber tape or combination These two or more types of composite tapes are processed. Among these, the adhesive tape having a multilayer structure of polyethylene and polypropylene is excellent in water repellency and durability. Further, the adhesive tape may be used alone or in combination of two or more.

Although the width of the adhesive tape is not particularly limited, it is preferably in the range of 2 to 15 cm, more preferably 5 to 10 cm from the viewpoint of workability and the like.

The packaging system of the present invention has respective protruding portions on both sides, and the protruding portion is preferably clamped along the outer wall of the protruding portion by using the clamping member such that at least a portion of the edge is fixed to the outer wall surface of the protruding portion. . By clamping with the clamping member to more securely fix the edge of the packaging material on the outer wall surface, even if the water is temporarily from the side of the packaging material The penetration between the edge and the outer wall surface of the protruding portion can also suppress contact with the roller. Further, before the edge of the wrapping material is fixed on the outer wall surface of the protruding portion, before the edge portion of the extruded packaging material is further cut, if the clamping by the clamping member is performed in advance, the fixing or cutting is performed. The operation will be easy. In each of the protruding portions, only one of the clamping members may be used, or two or more of them may be used.

The type of the above-described clamp member is not particularly limited, and a member called a restraint can be used. For example, a tie band or a stretchable tape made of metal or plastic can be used. Among these, from the viewpoint of operability, it is suitable as a ring-shaped stretchable tape.

The material of the stretchable tape is not particularly limited, and examples thereof include those showing the properties of rubber, specifically, natural rubber, decane rubber, acrylonitrile butadiene rubber, and the like. Although the inner diameter of the stretchable belt is not particularly limited, it is preferably 1.5 times the inner diameter at the time of clamping when compared with the inner diameter (the inner diameter when the cylinder is not formed). The above is more preferably 2.0 times or more, further preferably 2.5 times or more. In comparison with the usual inner diameter, if the inner diameter at the time of clamping is less than 1.5 times, the clamping force tends to be weak. On the other hand, if the inner diameter at the time of clamping exceeds 95% of the inner diameter of the stretch limit of the stretchable tape, the clamping force is uneven, or the tendency to break due to a slight impact or the like is clamped. The inner diameter of the time is preferably 95% of the inner diameter of the stretch limit of the stretchable tape. The thickness of the stretchable tape is not particularly limited, and is preferably in the range of 0.5 to 3 mm, more preferably in the range of 0.7 to 2 mm, still more preferably in the range of 1 to 1.5 mm. When the thickness is less than 0.5 mm, there is a tendency to break due to slight impact during stretching, and if the thickness exceeds 3 mm, the economy tends to be deteriorated.

The width of the stretchable belt is not particularly limited, and is preferably in the range of 10 to 30 mm, more preferably 15 to 20 mm. When the width is less than 10 mm, there is a tendency to break due to a slight impact or the like during stretching, and if the width exceeds 30 mm, the economy tends to be deteriorated.

Fig. 3 is a schematic view showing an example of a cross section of a vicinity of a protruding portion of a package in which an edge of a packaging material is fixed to an outer wall surface of a protruding portion by an adhesive tape. In Fig. 3, on the outer wall surface 22 of the protruding portion of the cylindrical core material 21, the edges of the double-wound packaging materials 25a and 25b are fixed by an adhesive tape 26. Further, in Fig. 3, the edges of the slack portions (25'a and 25'b) at the time of pressing the packaging material are similarly fixed to the outer wall surface 22 of the protruding portion by the adhesive tape 26. The adhesive surface 27 of the adhesive tape 26 is attached to both the packaging material (25b and 25'b) and the protruding outer wall surface 22 of the cylindrical core material 21, and is rolled along the outer wall of the protruding portion of the cylindrical heart material 21. Wrap around. The adhesive tape 26 can be formed into multiple windings, and in Fig. 3, there is a double-wound portion in which an adhesive tape (first layer) 26a and an adhesive tape (second layer) 26b are overlapped. Further, in Fig. 3, the protruding portion of the cylindrical heart material 21 is interposed between the outer peripheral wall of the protruding portion by the fixing members 25a and 25b which are fixed to the outer wall surface of the protruding portion by the clamping member 28. Come and clamp it. Further, in Fig. 3, the urethane spacer 29 is disposed inside the package and adjacent to the position of the edge surface of the roll, and the corrugated paper sheet 30 is also disposed outside the package and adjacent to the roll. The position of the edge face. Fig. 3 is an example of a package in which one type of packaging material is used alone, and as described above, two or more types of packaging materials may be used in combination.

The storage conditions at the time of storing the package of the present invention are not particularly limited, and the storage temperature is preferably in the range of -20 to 50 ° C, more preferably in the range of -10 to 40 ° C, still more preferably -5. Up to 30 ° C. In addition, even if the packaging system of the present invention is stored at a low temperature of 10 ° C or lower (for example, at 5 ° C or lower and further at 0 ° C or lower), it may occur after being stored in a processing plant or the like. It is difficult for the condensed water to penetrate into the inside of the package, and the effect of the present invention is more remarkable in the case of being stored at such a low temperature.

The storage humidity is preferably 80% RH or less, more preferably 50% RH or less.

The storage period at the time of storing the package is not particularly limited, and is, for example, preferably in the range of 1 day to 1 year, more preferably in the range of 2 days to 6 months.

The package of the present invention is preferably conveyed in a state in which the support rod is inserted into the inside of the heart material. In the present invention, the inner wall surface of the core material can be prevented from infiltrating into the interior of the package by exposing the inner wall surface of the core material to the outside air in a state in which the support rod is inserted into the inner portion of the core material.

When the package is transported while the support rod is inserted into the inside of the heart material, it is preferable to lift the support by lifting the support rod by a transport machine such as a crane. By lifting the support rod, the bending of the heart material due to the strength of the support rod is less likely to occur, and the damage of the PVA film due to the bending of the heart material can be prevented, and the operability is also improved.

[Examples]

Hereinafter, the present invention will be specifically described by way of examples, but the present invention is not limited by the examples. Further, the following methods for evaluating or measuring the moisture condensation on the inner wall surface of the core material, the appearance of the roll, and the amount of change in the average moisture content used in the following examples and comparative examples are shown below.

Water condensation on the inner wall of the heartwood

The condensation of moisture on the inner wall of the heartwood was evaluated according to the following criteria.

○: No moisture condensation (water droplets) was observed.

×: Condensation of water vapor (water droplets) was observed.

Roll appearance

The outer wall of the roll was evaluated according to the following criteria.

◎: No moisture absorption trace was observed.

○: Although the local portion (less than one half of the outer wall surface of the roller) has moisture absorbing traces, it is practically problem-free.

×: One or more of the outer wall surfaces of the rolls have moisture absorption marks.

Average moisture rate change

From the roll surface film of the measurement object, a 10×10 cm square (one layer) sample was continuously cut in the width direction. The obtained sample was placed in a dryer at 125 ° C for 8 hours, and the moisture content of each sample was calculated by dividing the mass of the sample before drying by the mass difference before and after drying. Next, the moisture content of the obtained sample was averaged to obtain the average moisture content of the roll. The same operation as described above was carried out in advance for the roll before packaging, and the amount of change in the average moisture content was obtained by subtracting the average moisture content of the roll before the package from the average moisture content of the measurement target roll.

[Example 1]

A PVA film having a film width of 2.8 m, a thickness of 75 μm, and a length of 4000 m (a polymerization degree of PVA of 2400 and a saponification degree of PVA of 99.9 mol%) was wound around a cylinder made of aluminum, having a length of 3.1 m, an outer diameter of 153 mm, and a thickness of 7 mm. A roller is formed on the central portion of the heart material. The quality of this roll is 1.2t.

Next, a laminated film in which aluminum is vapor-deposited to polyethylene terephthalate (having a thickness of 12 μm and a water vapor permeability of 1.5 g/m ² /24 h) along the outer wall of the roll is hereinafter referred to as "evaporation". The film was double-wound, and was fixed in a cylindrical shape by fixing the edge portion of the heart material in the longitudinal direction by a paper tape. Further, from above, a high-density polyethylene film (thickness: 20 μm) was double-wound along the outer wall of the roll, and a paper tape was used to fix the edge portion approximately parallel to the longitudinal direction of the heart material to form a cylindrical shape. Next, a group of urethane gaskets are placed adjacent to the edge faces of the rolls, and then the vapor-deposited film and the high-density polyethylene which are outside the longitudinal direction of the core material are arranged from the edge faces of the rolls on both sides. The film is post-extruded so that the edge of the slack portion is bent along the outer wall of each protruding portion, and the vapor-deposited film is further formed by an endless rubber belt (generally having an inner diameter of 76 mm, a thickness of 1.1 mm, and a width of 18 mm). The high density polyethylene film is interposed in the middle and clamped along the outer wall of the projection. Thereafter, the edge of the slack portion is also included, and the edge of the vapor-deposited film and the high-density polyethylene film is fixed to the outer wall surface of each of the protrusions by an adhesive tape (adhesive tape having a multilayer structure of polyethylene and polypropylene; width: 5 cm). , sealing the PVA film. At this time, the adhesive tape is wound along the outer wall of each of the protruding portions so that the adhesive surface of the adhesive tape is connected to both the high-density polyethylene film and the outer wall surface of the protruding portion. Further, a set of corrugated paper sheets was placed above the high-density polyethylene film adjacent to the edge faces of the rolls to form a package.

The obtained package was stored in the above environment at -5 ° C and 10% RH for 3 days, and then transferred to an environment of 20 ° C and 40% RH, and left for 3 hours, and then subjected to the above method in the heart material. Assessment of moisture condensation on the wall.

Next, in the case where a large amount of moisture condensation has occurred, 100 ml of water is poured into the inside of the cylindrical heart material, and the shaking is assumed to be shaken when the conveyance is assumed. Then, at the time of opening, the water in the vicinity of the edge portion of the heart material was wiped without contacting the PVA film, and then the package was opened, and the appearance of the roll and the change in the average moisture content were measured by the above method. The results are shown in Table 1.

[Embodiment 2]

In the first embodiment, the package was obtained in the same manner as in the first embodiment except that the clamping by the rubber tape was not performed.

With respect to this package, in the same manner as in Example 1, each evaluation or measurement of the amount of change in moisture condensation on the inner wall surface of the core material, the appearance of the roll, and the average moisture content was performed. The results are shown in Table 1.

[Comparative Example 1]

In the first embodiment, the package was obtained in the same manner as in Example 1 except that the edge of the packaging material was not clamped by the adhesive tape.

With respect to this package, in the same manner as in Example 1, each evaluation or measurement of the amount of change in moisture condensation on the inner wall surface of the core material, the appearance of the roll, and the average moisture content was performed. The results are shown in Table 1.

[Comparative Example 2]

In the embodiment 1, except that the edge of the packaging material is not fixed by the adhesive tape, and the clamping by the rubber band is not performed, and the width direction is The excess packaging material was inserted into the inside of the core material, and the package was obtained in the same manner as in Example 1.

With respect to this package, in the same manner as in Example 1, each evaluation or measurement of the amount of change in moisture condensation on the inner wall surface of the core material, the appearance of the roll, and the average moisture content was performed. The results are shown in Table 1.

[Possibility of industrial use]

According to the present invention, even when moisture condensation occurs on the surface of the package such as the inner wall surface of the cylindrical heart material, it is difficult to infiltrate the inside of the package from the water to be condensed, for example, in an environment where moisture condensation easily occurs, for example, The quality of the PVA film can also be maintained under the conditions of transportation of aircraft or ships where the temperature changes rapidly, or in the environment in which it is stored in a warehouse exposed to low temperatures.

1‧‧‧ Roll

2, 21‧‧‧ cylindrical heartwood

3, 24‧‧‧ PVA film

4‧‧‧The edge of the heartwood

5, 12‧‧ ‧ roll edge surface

6, 13‧‧‧ protruding parts

7, 22‧‧‧ outside the wall of the protrusion

8, 23‧‧‧ inside wall of the protruding part

11‧‧‧Flake packaging materials

14‧‧‧ approximately parallel to the edge of the long side of the heartwood

15‧‧‧Exceeded parts

25a‧‧‧Packaging materials (first floor)

25b‧‧‧Packaging materials (second floor)

25’a‧‧‧Slack of packaging material (first layer)

25'b‧‧‧ slack part of packaging material (second layer)

26‧‧‧Adhesive tape

26a‧‧‧Adhesive tape (first layer)

26b‧‧‧Adhesive tape (second layer)

27‧‧‧Adhesive surface of adhesive tape

28‧‧‧Clamping members

29‧‧‧Amino acid amide gasket

30‧‧‧Corrugated paper gasket

Fig. 1 is a schematic view showing an example of a roller used in the present invention.

Fig. 2 is a schematic view showing an example of a packaging method at the time of packaging a roll using a sheet-shaped packaging material.

Fig. 3 is a schematic view showing an example of a cross section of a vicinity of a protruding portion of a package in which an edge of a packaging material is fixed to an outer wall surface of a protruding portion by an adhesive tape.

21‧‧‧Cylindrical heartwood

22‧‧‧Outside the wall

23‧‧‧The inner wall of the protruding part

24‧‧‧PVA film

25a‧‧‧Packaging materials (first floor)

25b‧‧‧Packaging materials (second floor)

25’a‧‧‧Slack of packaging material (first layer)

25'b‧‧‧ slack part of packaging material (second layer)

26‧‧‧Adhesive tape

26a‧‧‧Adhesive tape (first layer)

26b‧‧‧Adhesive tape (second layer)

27‧‧‧Adhesive surface of adhesive tape

28‧‧‧Clamping members

29‧‧‧Amino acid amide gasket

30‧‧‧Corrugated paper gasket

Claims (8)

A package obtained by wrapping a roll of a polyvinyl alcohol polymer film on a cylindrical heart material by a packaging material, wherein at least a part of the surface of the heart material is made of metal and/or plastic The two ends of the core material form a protruding portion protruding from the edge surface of the roller, and at least a part of the edge of the wrapping material is fixed on the outer wall surface of the protruding portion; at the respective protruding portions of the two, the adhesive tape is adhered The surface is connected to both the packaging material and the outer wall surface of the protruding portion to wrap the adhesive tape along the outer wall of the protruding portion; at each of the protruding portions of the protrusion, the protruding portion is at least a part of the edge by the clamping member The packaging material fixed to the outer wall surface of the projection is interposed and clamped along the outer wall of the projection. The package of claim 1, wherein the inner wall surface of the core material has been exposed to outside air. The package according to claim 1, wherein the polyvinyl alcohol-based polymer film has a width of 2.1 m or more. The package body of claim 1, wherein the quality of the roller is 0.5t or more. A package according to claim 1, wherein at the respective projections of the both, the edge of the wrapping material fixed on the outer wall of the projection surrounds the outer wall of the projection approximately continuously. The package according to any one of claims 1 to 5, wherein the packaging material is a film having a water vapor permeability of 5 g/m ² /24 h or less. A method of storing a package, which is a package according to any one of claims 1 to 6 at 10 ° C or lower. A method of transporting a package by transporting a support rod into a state of the inside of the core material of the package of any one of claims 1 to 6 of the patent application.