JP2016084140A - Storage body of wrapping film roll - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a storage body of a wrapping film roll excellent in drawability and cuttability and capable of preventing tear trouble causing when drawing a film out of the wrapping film roll.SOLUTION: A wrapping film roll 110 in a storage body 200 is formed by rolling a wrapping film in which a film thickness is 6 to 18 μm; tear strength of a film on a film production line in a film width direction is 2 to 6 cN; and a polyvinylidene chloride-based resin is included. A dynamic friction coefficient between the inner face of a front plate 211 of a storage body 210 and the wrapping film roll is less than 0.28, and that coefficient between the wrapping film roll and at least central part 25-80% (area ratio) of the inner faces of a bottom plate 212, a rear plate 213 and a cover plate 214 of the storage body 210 is 0.35 or more.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a wound body container.

  Food packaging films are required to be wrapped in porcelain or glass containers, or to have high adhesion between the films, and can be pulled out smoothly from the wound body, and are intended when pulled out. It must be able to cut in the intended direction without breaking.

  Conventionally, vinylidene chloride-based resin wrap films have superior adhesion, cutability, and gas barrier properties compared to wrap films made of other materials such as polyolefin resin. It has been used in general households.

For example, Patent Document 1 discloses that the axis in the molecular chain direction of the crystal is the surface of the film, mainly for the purpose of providing a polyvinylidene chloride resin wrap film that suppresses troubles of longitudinal tearing and is excellent in adhesion and transparency. Specific calculation from the full width at half maximum μ of the peak appearing when the diffraction peak intensity of the (100) plane is plotted against the azimuth angle by the transmission method two-dimensional wide-angle X-ray scattering measurement from the EDGE direction. A polyvinylidene chloride resin wrap film having a crystal orientation F defined by the formula of 72.0% to 89.3% has been proposed. Patent Document 2 describes that a wound wrap film for refilling can be stably supplied to the market without greatly detracting from its commercial value, and it is easy to reduce the volume when saving resources, reducing waste, and disposing of it. The purpose of the present invention is to provide a refill wrap film container and a bladeless storage box used therefor, which can handle almost the same as current products (non-refillable products) while addressing environmental problems such as A wound wrap film in which a wrap film is wound around the outer periphery of the body, and a bladeless storage box capable of storing the wound wrap film, wherein the bladeless storage box includes at least one base paper folded in plural. The base paper has a basis weight in the range of 150 to 480 g / m ² and is bent along the line, and the minimum inner dimension W between the side plates in the longitudinal direction of the bladeless storage box. (Mm) is the cylindrical core The axial length S (mm) satisfies the relationship of S-1.0 ≦ W ≦ S, and the cylindrical core body is stored in the bladeless storage box with substantially no gap in the axial direction. A refill wrap film container has been proposed.

JP 2011-168750 A JP 2011-148540 A

  Wrapping films, in particular vinylidene chloride resin wrapping films, are widely used mainly as food packaging materials for household use because they have properties of high adhesion and good cutability. However, because of these properties, a wrap film, particularly a vinylidene chloride-based resin wrap film, may have a tearing trouble at a thickness of about 10 μm. "Tearing trouble" as used herein refers to an unintended direction when pulling out a film from a wound body and when picking out an end of a film that has been rewound into a container (decorative box) that houses the wound body. It is a trouble that the film is torn and normal use is difficult. The tearing trouble tends to occur particularly in the initial stage of use because the wound body is damaged by vibration during distribution. In addition, since the end face is likely to be locally impacted and becomes a base point of damage, it tends to occur when the wrap film wound body has an “impact shoulder shape”. Here, “Ikari shoulder shape” means the width X (3) of the wrap film wound body on the third turn from the winding end when not in use and the width on the 30th turn from the winding end when not in use. The difference from the length X (30) is less than 1.0 mm, and the width length X (5) of the wrap film wound body in the fifth turn from the winding end when not in use and the winding end when not in use The shape in which the difference from the width length X (30) of the 30th turn is less than 0.5 mm. In response to the problem of “breaking trouble”, it is possible to make it difficult to tear by, for example, a method of thickening the film. However, by increasing the thickness of the film, there is room for further improvement in ease of use, such as a decrease in cutability, a decrease in adhesion performance due to a decrease in followability to a packaging target, and a decrease in ease of pulling out.

  Conventionally, as in Patent Document 1, it is known to control the film orientation trouble by controlling the degree of crystal orientation. However, in this method, although the trouble of tearing the wrap film is reduced, the film cutting blade enters the wrap film due to the crystal orientation and the stress is difficult to propagate. Is not always enough.

  Further, as in Patent Document 2, the relationship between the axial length S (mm) of the cylindrical core body and the minimum value W (mm) of the inner dimension between the side plates in the longitudinal direction of the container is expressed as W−S ≦ 1. A method of preventing tearing by setting it to 0 is also known. Thus, by making the container and the gap in the longitudinal direction of the wound body substantially zero, vibration of the wound body within the container hardly occurs, so that the occurrence of scratches is suppressed, and the initial use It is possible to reduce tearing troubles. However, what is described in Patent Document 2 is a refill wrap film container, and a normal wound body container needs to draw out a wrap film from the container, so that the relationship of WS ≦ 1 mm is satisfied. Then, it was found that the contact between the cylindrical core body and the inner wall surface of the container (container) and friction increased when the wrap film was pulled out, and there was room for further improvement in the drawability.

  Therefore, it can be said that such a wrap film is extremely useful if both seemingly contradictory problems of suppressing tearing troubles of the wrap film can be solved while maintaining drawability and cutability.

  The present invention has been made in view of the above circumstances, and has an object of providing a wound body container that is excellent in drawability and cutability, and that can suppress tearing troubles when pulling out a film from the wound body. To do.

  As a result of intensive studies on the above problems, the present inventors have found that the cause of tearing is damage generated on the surface layer of the wound body due to vibration during distribution and use, and the predetermined wound body and the accommodation The present inventors have found that the above problems can be solved by a combination of bodies, and have completed the present invention.

That is, the present invention is as follows.
[1]
A wound body container including a wrap film wound body, a cylindrical core body around which the wrap film wound body is wound, and a housing body that houses the wrap film wound body,
The wrap film wound body has a film thickness of 6 to 18 μm and a wrap film containing a polyvinylidene chloride-based resin having a tear strength of 2 to 6 cN in the width direction of the film of the film forming line. And
Width of the wrap film wound body X (3) of the third turn from the winding end when not in use, width length X (5) of the fifth turn from the winding end when not in use, unused The width length X (30) of the 30th lap from the winding end of time satisfies the following formulas (A1) and (B1),
X (30) -1.0 mm <X (3) (A1)
X (30) −0.5 mm <X (5) (B1)
The dynamic friction coefficient between the inner surface of the front plate of the container and the wrap film wound body is less than 0.28, and at least the central part of the inner surface of the bottom plate, the rear plate, and the cover plate of the container is 25 to 80%. A wound body container in which a dynamic friction coefficient between (area ratio) and the wrap film wound body is 0.35 or more.
[2]
A wound body container including a wrap film wound body, a cylindrical core body around which the wrap film wound body is wound, and a housing body that houses the wrap film wound body,
The wrap film wound body has a film thickness of 6 to 18 μm and a wrap film containing a polyvinylidene chloride-based resin having a tear strength of 2 to 6 cN in the width direction of the film of the film forming line. And
The wrap film wound body has a width X (3) of the third turn from the winding end when not used, a width length X (5) of the third turn from the winding end when not used, and the unused. The width length X (30) of the 30th lap from the winding end of time satisfies the following formulas (A1) and (B1),
X (30) -1.0 mm <X (3) (A1)
X (30) −0.5 mm <X (5) (B1)
A wound body container having a dynamic friction coefficient of 0.35 or more between a central part of the inner surface of the front plate of the container body of 25 to 80% (area ratio) and the wrap film wound body.
[3]
The coefficient of dynamic friction between the bottom plate of the container, the rear plate, and the center portion of the inner surface of the cover plate of 25 to 80% (area ratio) and the wrap film wound body is 0.35 or more,
The dynamic friction coefficient between the outer side of the center part of the front plate, the bottom plate, the rear plate, and the cover plate and the wrap film wound body is less than 0.28.
The wound body container according to the preceding item [2].
[4]
[1] to [1] to [1] to [1], wherein the axial length S (mm) of the cylindrical core and the minimum value W (mm) of the inner dimension between the side plates in the longitudinal direction of the container satisfy the following formula (E1). [3] The wound body container according to any one of [3].
1 mm <W−S ≦ 3 mm (E1)

  ADVANTAGE OF THE INVENTION According to this invention, the winding body container which is excellent in drawability and cutability and can suppress the tear trouble at the time of pulling out a film from a wound body can be provided.

It is the schematic for demonstrating the width length in the wrap film winding body used by 1st and 2nd embodiment. It is another schematic diagram for demonstrating the width length in the wrap film winding body used by 1st and 2nd embodiment. It is the schematic which shows an example of the apparatus used when manufacturing the wrap film used by 1st and 2nd embodiment. It is the schematic which shows an example of the wrap film winding body container used by 1st and 2nd embodiment. It is the schematic for demonstrating the relationship between the axial length S of the cylindrical core body used by 1st and 2nd embodiment, and the minimum value W of the internal dimension between the side plates of a container. It is an expanded view of the container used in 1st Embodiment. It is an expanded view which shows the other aspect of the container used in 1st Embodiment. It is an expanded view of the container used in 2nd Embodiment. It is an expanded view which shows the other aspect of the container used in 2nd Embodiment.

  Hereinafter, the first embodiment and the second embodiment for carrying out the present invention will be described in detail with reference to the drawings as necessary. The present invention will be described in detail below. The present invention is not limited to the second embodiment, and various modifications can be made within the scope of the gist. In the drawings, the same elements are denoted by the same reference numerals, and redundant description is omitted. Further, the positional relationship such as up, down, left and right is based on the positional relationship shown in the drawings unless otherwise specified. Further, the dimensional ratios in the drawings are not limited to the illustrated ratios.

[Wound body container]
[First Embodiment]
The wound body container according to the first embodiment will be described. The wound body container according to the first embodiment is
A wound body container including a wrap film wound body, a cylindrical core body wound around the outer periphery of the wrap film wound body, and a housing body that houses the wrap film wound body,
The wrap film wound body is made of a polyvinylidene chloride resin having a film thickness of 6 to 18 μm and a tear strength of 2 to 6 cN in the film width direction (hereinafter also referred to as “TD”). Wrapping film containing is wound,
The width X (3) of the third lap from the winding end when not in use, the width X (5) of the fifth lap from the winding end when not in use, and when not in use The width length X (30) of the 30th lap from the winding end of
X (30) -1.0 mm <X (3) (A1)
X (30) −0.5 mm <X (5) (B1)
The coefficient of dynamic friction between the inner surface of the front plate of the container and the wrapped wrap film is less than 0.28, and at least the central portion of the inner surface of the bottom plate, rear plate, and lid plate of the container is 25 to 80% (area ratio) ) And the wrap film wound body have a coefficient of dynamic friction of 0.35 or more.

  If it is such a wound body container, the dynamic friction coefficient between the wrap film wound body and the bottom plate, the rear plate, and the lid plate of the container body, even when a wrap film wound body having a shoulder shape is used. By adjusting the vibration, it is possible to suppress vibration during distribution and use, and thereby it is possible to suppress the occurrence of damage to the surface layer of the wrap film wound body. Moreover, it becomes possible to improve the drawability of a wrap film by adjusting the dynamic friction coefficient of a wrap film winding body and the front board of a container. As a result, it is possible to suppress tearing troubles when pulling out the film from the wound body while maintaining drawability, adhesion and cutability.

[Wrap film roll]
The wound body container according to the first embodiment includes a wrap film wound body. The wrap film wound body is obtained by winding a wrap film containing a polyvinylidene chloride-based resin having a film thickness of 6 to 18 μm and a tear strength in the width direction of the film of the film forming line of 2 to 6 cN. is there.

  FIG.1 and FIG.2 is the schematic for demonstrating the width length in a wrap film winding body. FIG. 1 shows a wrap film wound body 110 in which a wrap film 110 a is wound around the outer periphery of a cylindrical core body 120. Further, in FIG. 2, a wrap film wound body 110 in which a wrap film 110a is wound around the outer periphery of the cylindrical core body 120 is cut so as to be orthogonal to the film width direction in the wrap film 110a and divided into two. Indicates a gyrus. The wrap film wound body 110 used in the first embodiment is not limited to the one shown in FIGS. The wrap film wound body 110 is formed by winding a wrap film 110a around the cylindrical core body 120 as an axis, and has a wound end 110b on the outermost periphery thereof. As is apparent from the fact that the end surface of the winding end 110b of the wrap film 110a appears on the front side of FIG. 1, the wrap film 110a has a cylindrical shape when viewed from the arrow direction D in FIGS. A wrap film wound body 110 is formed by winding the core body 120 toward the outermost periphery in a direction opposite to the clockwise direction.

The wrap film wound body 110 has a width X (3) [unit: mm] of the third turn from the winding end 110b when not in use and a width length X of the fifth turn from the winding end 110b when not in use. (5) [Unit: mm] and the width length X (30) [unit: mm] on the 30th turn from the winding end 110b when not in use satisfy the following formulas (A1) and (B1).
X (30) -1.0 mm <X (3) (A1)
X (30) −0.5 mm <X (5) (B1)

When wound bodies 110d and 110e are respectively cut into two by cutting at a cut surface MC so as to be orthogonal to TD in the wrap film wound body 110, the wound body 110d or 110e is unused. Width length Xi (3) [unit: mm] of the third turn from the winding end 110b of time, width width Xi (5) [unit: mm] of the fifth turn from the winding end 110b when not in use, The width length Xi (30) [unit: mm] of the 30th turn from the winding end 110b when not in use preferably satisfies the following formulas (C1) and (D1).
Xi (30) -1.0 mm <Xi (3) (C1)
Xi (30) −0.5 mm <Xi (5) (D1)
In each wound body divided into two, Xi (3), Xi (5), and Xi (30) may be different from each other or the same.

  By winding so as to satisfy the above formulas (A1) and (B1), at least one of the TD end faces 110f of the wrap film wound body 110 becomes a shoulder shape. Thereby, when the wrap film wound body 110 vibrates in the container due to vibration during distribution or use, the wrap film is brought into contact with the outermost periphery of the wrap film wound body 110 and the inner wall surface of the container. Locations of the wound body 110 that receive an impact tend not to be dispersed. However, by setting the dynamic friction coefficient between the wrap film wound body 110 and the container within a predetermined range, it is possible to reduce the amount of minute damage particularly on the TD end face 110f, and greatly reduce the tearing trouble starting from the minute damage. It becomes possible to reduce it.

  As for each width length, after the wrap film wound body 110 is cut so as to be orthogonal to the TD as necessary, the wrap film 110a is actually pulled out from the wrap film wound body 110 (or the divided wound body) and wound. It can obtain | require by measuring the length in TD of the lap | wrap film 110a of the part applicable to the 3rd, 5th, 10th, 30th lap from the turning end 110b. At that time, the measurement is performed so that wrinkles are not formed at the measurement position of the wrap film 110a and the wrap film 110a is not stretched by applying an excessive force.

  As a method for manufacturing the wrap film wound body 110 having such a shape, for example, the TD of the film before being wound so that the width is constant from the center of the wrap film wound body 110 toward the outermost periphery. For example, a method in which the length of the direction is made constant and the wire is wound. However, the method of manufacturing the wrap film wound body 110 is not particularly limited.

[Wrap film]
The material of the wrap film 110a is not particularly limited as long as it is a resin composition containing a vinylidene chloride resin. For example, a polyolefin resin such as polyethylene, polypropylene (including stretched polypropylene), polymethylpentene, etc .; polyvinyl chloride resin; Nylon may further be included.

  The vinylidene chloride resin is not particularly limited as long as it contains a vinylidene chloride unit, and may contain a monomer unit copolymerizable with vinylidene chloride. The monomer unit copolymerizable with vinylidene chloride is not particularly limited. For example, acrylic acid esters such as vinyl chloride, methyl acrylate and butyl acrylate; methacrylic acid esters such as methyl methacrylate and butyl methacrylate; acrylonitrile And vinyl acetate. These monomer units copolymerizable with vinylidene chloride may be used alone or in combination of two or more.

  The content of vinylidene chloride units in the vinylidene chloride-based resin is preferably 72 to 93% by mass, and more preferably 81 to 90% by mass. When the content of vinylidene chloride units in the vinylidene chloride resin is 72% by mass or more, it is possible to suppress the glass transition temperature of the vinylidene chloride resin from being increased. As a result, it can be used in a low temperature environment such as winter. Sometimes it can prevent the film from becoming brittle and easy to tear. On the other hand, the content of vinylidene chloride units in the vinylidene chloride resin is 93% by mass or less, so that a significant increase in crystallinity can be suppressed. As a result, the moldability during film stretching can be maintained at a higher level. Can do.

  In addition, the resin composition may be a plasticizer, a stabilizer, a weather resistance improver, a colorant such as a dye or a pigment, an antifogging agent, an antibacterial agent, a lubricant, or a nucleating agent, as required. A vinylidene chloride-based resin composition to which or the like is added may also be included. These may be used alone or in combination of two or more.

  The plasticizer is not particularly limited, and specific examples thereof include citrate esters such as tributyl acetylcitrate, dimethyl phthalate, diethyl phthalate, dioctyl phthalate, glycerin, glycerin ester, wax, liquid paraffin, and phosphoric acid. Examples include esters and epoxidized soybean oil.

  The stabilizer is not particularly limited. Specifically, 2,5-t-butylhydroquinone, 2,6-di-t-butyl-p-cresol, 4,4′-thiobis- (6-t- Butylphenol), 2,2′-methylene-bis- (4-methyl-6-tert-butylphenol), octadecyl-3- (3 ′, 5′-di-tert-butyl-4′-hydroxyphenyl) bropionate, and Antioxidants such as 4,4′-thiobis- (6-tert-butylphenol); epoxidized vegetable oil, laurate, myristate, palmitate, stearate, isostearate, oleate, ricinoleic acid Thermal stabilizers such as salts, 2-ethyl-hexylate, isodecanoate, neodecanoate, and calcium benzoate.

  The weather resistance improver is not particularly limited, but specifically, ethylene-2-cyano-3,3′-diphenyl acrylate, 2- (2′-hydroxy-5′-methylphenyl) benzolitriazole, 2 UV rays such as-(2'-hydroxy-3'-t-butyl-5'-methylphenyl) 5-chlorobenzotriazole, 2-hydroxy-4-methoxybenzophenone and 2,2'-dihydroxy-4-methoxybenzophenone An absorbent is mentioned.

  Although it does not specifically limit as colorants, such as dye or a pigment, Specifically, carbon black, a phthalocyanine, a quinacridone, an indoline, an azo pigment, and a bengara are mentioned.

  Although it does not specifically limit as an antifogging agent, Specifically, glycerin fatty acid ester, sorbitan fatty acid ester, polyoxyethylene fatty acid alcohol ether, polyoxyethylene glycerin fatty acid ester, and polyoxyethylene sorbitan fatty acid ester are mentioned.

  Although it does not specifically limit as an antibacterial agent, Specifically, a silver-type inorganic antibacterial agent is mentioned.

  The lubricant is not particularly limited. Specifically, fatty acid hydrocarbon lubricants such as ethylene bissteramide, butyl stearate, polyethylene wax, paraffin wax, carnauba wax, myristyl myristate, stearyl stearate, and higher fatty acid lubricants. , Fatty acid amide lubricants, and fatty acid ester lubricants.

  Although it does not specifically limit as a nucleating agent, Specifically, a phosphate ester metal salt is mentioned.

  The content of the vinylidene chloride resin in the resin composition is preferably 80% by mass or more, more preferably 85% by mass or more, still more preferably 90% by mass or more, and particularly preferably 92% by mass or more.

(Film thickness)
The thickness of the wrap film is 6 to 18 μm, preferably 8 to 15 μm, and more preferably 9 to 12 μm. When the thickness of the wrap film is within the above range, the film breakage, cutability, drawability, and adhesion are excellent in a well-balanced manner. Since the wrap film thickness is 18 μm or less, the force required to cut the film with the film cutting blade can be reduced, so the deterioration of the cutability and the followability to the shape of the packaging target of the film are suppressed. The adhesion to the packaging object can be further enhanced. In addition, when the thickness of the wrap film is 18 μm or less, in the conventional wound body, the tear strength is smaller, so that the film is drawn back from the wound body and wound back into the container (decorative box). When picking out the film edge, there is a tendency for the tearing trouble that the film tears from the edge that appears by cutting with a cutting blade attached to the decorative box. However, in the first embodiment, film tearing troubles can be suppressed by setting the dynamic friction coefficient between the wrap film roll and the container to a predetermined value. On the other hand, since the fall of the tensile stress of a film can be suppressed because the thickness of a wrap film is 6 micrometers or more, the film piece at the time of use can be prevented. In addition, film thickness can be calculated | required by the method as described in an Example.

(Tear strength)
The tear strength (hereinafter also referred to as “TD tear strength”) of the film of the wrap film production line is preferably 2.0 to 6.0 cN, more preferably 2.3 to 5.0 cN, and more preferably 2 More preferably, it is 5-4.0 cN. In the first embodiment, when the TD tear strength is 6.0 cN or less, the force required to cut the film with the film cutting blade can be reduced, so that the cutting property becomes better and the usability is better. Have. Further, when the TD tear strength of the wrap film is 6.0 cN or less, the conventional wound body tends to cause a tearing trouble when the film is pulled out, starting from damage at the film end due to vibration. However, in the first embodiment, film tearing troubles can be suppressed by setting the dynamic friction coefficient between the wrap film roll and the container to a predetermined value. On the other hand, when the TD tear strength is 2.0 cN or more, the film is more difficult to tear when the damage is smaller than the damage caused by vibration. The tear strength measurement method described here is based on JIS-P-8116 (2000).

[Manufacturing method of wrap film wound body]
The method for producing the wrap film used in the first embodiment is not particularly limited, and may be a conventionally known method. The wrap film is obtained, for example, by melt-extruding a resin from an extruder, forming a film, stretching, and winding it around a core. As a method for forming and stretching the melt-extruded resin, for example, an inflation method or a tenter method can be used. The wrap film is stretched to a suitable thickness. In order to improve the cutability of the wrap film, the control of the TD direction during stretching, and the TD tear strength obtained thereby are important factors.

  Hereinafter, an inflation method using a vinylidene chloride-based resin will be described more specifically as an example of a method for producing a wrap film according to the first embodiment. Drawing 3 is a schematic diagram showing an example of the manufacturing method of the wrap film concerning a 1st embodiment.

  First, a molten vinylidene chloride resin or a resin composition containing a vinylidene chloride resin is extruded into a tubular shape from a die port 3 of a circular die 2 by an extruder 1 to form a sock 4 that is a tubular resin composition. .

  Next, the outside of the sock 4 as an extrudate is brought into contact with cold water in the cold water tank 6, and the sock liquid 5 is injected into the inside of the sock 4 by a conventional method and stored, thereby cooling the sock 4 from inside and outside. Solidify. At this time, the sock 4 is in a state where the sock liquid 5 is applied to the inside thereof. The solidified sock 4 is folded by a first pinch roll 7 to form a parison 8 which is a double ply sheet. The application amount of the sock liquid 5 is controlled by the pinch pressure of the first pinch roll 7.

  Although it does not specifically limit as the sock liquid 5, For example, water, mineral oil, alcohols; Polyhydric alcohols, such as propylene glycol and glycerol; Cellulose type and polyvinyl alcohol type aqueous solution are mentioned. A sock liquid may be used individually by 1 type, or may use 2 or more types together. Moreover, you may add the weather resistance improver, antifogging agent, antibacterial agent, etc. which are used for the conventional food packaging material to a sock liquid as needed.

  Although the application amount of the sock liquid 5 is not particularly limited, it is preferably 50 to 20000 ppm, more preferably 100 to 15000 ppm, and still more preferably 150 to 10,000 ppm from the viewpoint of the opening of the parison and the film adhesion. Here, the coating amount (ppm) indicates the mass of the sock liquid 5 applied to the sock 4 in mass ppm with respect to the total mass of the sock 4.

  Subsequently, by injecting air into the inside of the parison 8, the parison 8 is opened again and becomes tubular. The parison 8 is reheated to a temperature suitable for stretching by warm water (not shown). The warm water adhering to the outside of the parison 8 is squeezed out by the second pinch roll 9. Next, in the inflation step, air is injected into the tubular parison 8 heated to an appropriate temperature, and bubbles 10 are formed by inflation stretching, whereby a stretched film is obtained.

  The tear strength of the film is not uniquely determined by the draw ratio, but can be mainly controlled by the draw ratio. In order to obtain a film having excellent cutting properties and suppressing tearing troubles, the stretching ratio in the MD and TD directions is preferably 4 to 6 times under the stretching temperature of 30 to 45 ° C.

  Thereafter, the stretched film is folded by the third pinch roll 11 to become a double ply film 12. The double ply film 12 is taken up by a take-up roll 13. Further, the double ply film 12 is slit and peeled to become a single film (single peeling). Finally, this film is wound on, for example, a core to obtain a wrap film wound body.

  The above description is an example of a method for manufacturing the wrap film of the first embodiment, and the wrap film may be manufactured according to various apparatus configurations and conditions other than those described above. For example, other known methods may be employed. May be.

  The wrap film wound body 110 of the first embodiment exists in a state of being wound around the cylindrical core body 120 as described above. Such an embodiment is preferable because it is advantageous in that it is obtained in a large amount and, when used, draws and cuts only a film having a required length. The kind of core is not particularly limited, and may be a conventionally known one. The core may be made of, for example, paper, plastic, metal, wood, or a combination of these.

(Cylindrical core)
The wound body container according to the first embodiment includes a cylindrical core body. The cylindrical core body is obtained by winding a wrap film wound body on the outer periphery.

[Container]
Next, the wound body container of the first embodiment will be described. The wound body container according to the first embodiment includes a container that houses the wrap film wound body. In the first embodiment, the coefficient of dynamic friction between the inner surface of the front plate of the container and the wrapped wrap film is less than 0.28, and the inner surface of the bottom plate, rear plate, and lid plate of the container and the wrap film The dynamic friction coefficient with the wound body is 0.35 or more.

  FIG. 4 is a schematic diagram illustrating an example of a wound body container according to the first embodiment. The wound body container 200 of the first embodiment includes a wrap film wound body 110, a cylindrical core body 120 wound around the outer periphery of the wrap film wound body 110, and a wrap film wound body 110 and a tubular shape. A housing body 210 housing the core body 120 is provided. The accommodating body 210 is a rectangular parallelepiped accommodating chamber 223 formed by the wall surfaces of the front plate 211, the bottom plate 212, the rear plate 213, and the side plate 218, and the direction in which the accommodating chamber 223 is covered from the upper edge of the rear plate 213. The cover plate 214 is connected to the cover plate 214, the cover plate 215 extends from the front edge of the cover plate 214 in a direction covering the front plate 211, and the side wall cover pieces 221 are provided on both sides of the cover cover piece 215. It is a storage box provided with the lid body 224 to be operated. Moreover, the wound body container 200 includes a film cutting blade 200K at a position where the wrap film 110a can be easily cut. The film cutting blade 200K may be provided, for example, at the leading edge of the lid cover piece 215. Further, the wound body container 200 is devised so that the main body of the wrap film wound body 110 does not jump out of the housing body 210 when the wrap film 110a is pulled out from the accommodated wrap film wound body 110. It is more preferable. Further, the dimensions of the container 210 are more preferably 40 to 54 mm in height, 40 to 54 mm in depth, and 153 to 313 mm in length so as to be easily held with one hand.

  The material of the container 210 is not particularly limited, and may be, for example, plastic, metal, wood, cardboard and paperboard, or a combination thereof, and paperboard is more preferable in terms of ease of use. This paperboard is a thick paper having a thickness of 0.35 to 1.50 mm. Generally, the thicker the thicker, the stronger and stronger the box can be obtained. However, since bending becomes difficult, the thickness is more preferably 0.35 to 0.80 mm.

FIG. 5 is a schematic diagram for explaining the relationship between the axial length of the cylindrical core body 120 and the minimum value of the inner dimension between the side plates 218 of the container 210. Minimum value W (unit: mm) of the inner dimension between the axial length S (unit: mm) of the cylindrical core body 120 wound with the wrap film winding body 110 and the side plate 218 in the longitudinal direction of the container 210. (W−S) [unit: mm] preferably satisfies the following formula (E1), more preferably satisfies the following formula (E2), and further preferably satisfies the following formula (E3).
1 mm <W−S ≦ 3 mm (E1)
1 mm <W−S ≦ 2 mm (E2)
1 mm <W−S ≦ 1.5 mm (E3)

  When the difference (W−S) is 3 mm or less, the gap between the wrap film winding body 110 and the side plate 218 inside the container 210 is narrow, so that vibration during distribution and use is suppressed, and the wrap film winding The damage amount of the TD end face 110f in the body 110 is further reduced. In particular, in the conventional wound body, unless the value of the difference (WS) is 1 or less, it is difficult to sufficiently suppress the damage of the film, while the value of the difference (WS) exceeds 1. Otherwise, it is difficult to make the drawability of the film better, so it is difficult to suppress damage to the film and to make the drawability better. However, in the first embodiment, by making the dynamic friction coefficient as described above, even if the difference (W−S) exceeds 1, damage to the film can be sufficiently suppressed. If the condition represented by the above formula (E1) is satisfied, the film is likely to be more sufficiently prevented from being damaged.

  When the difference (W−S) is larger than 1 mm, a gap between the wrap film wound body 110 and the side plate 218 inside the container 210 can be secured to some extent, so that the contact between the wrap film 110a and the inner wall surface of the container 210 is further increased. This can be effectively prevented, and as a result, the drawability of the wrap film 110a becomes better. Further, as the wrap film 110a is rotated when the wrap film 110a is pulled out, the cylindrical core body 120 moves to the upper part of the storage body 210 due to friction with the inner wall surface of the storage body 210. As a result, the cylindrical core body 120 jumps out of the storage body 210. In other words, it tends to be more sufficiently suppressed.

  In particular, it has become possible to achieve a balance between the contradictory relationship between the improvement of the drawability of the film and the prevention of tearing trouble by making the coefficient of dynamic friction as described above.

  6 and 7 are developed views of the container used in the first embodiment. 6 and 7, the surface having a dynamic friction coefficient of less than 0.28 is indicated by thin shading, and the surface having a dynamic friction coefficient of 0.35 or more is indicated by dark shading. The dynamic friction coefficient between the inner surface of the front plate 211 of the container and the wrap film wound body 110 is less than 0.28, preferably 0.26 or less, and more preferably 0.25 or less. The dynamic friction coefficient between the inner surface of the front plate 211 of the container and the wrap film wound body 110 is less than 0.28, so that the film from the wrap film wound body is maintained while maintaining drawability, adhesion and cutability. The tear trouble at the time of pulling out can be suppressed, and the damage at the time of vibrating can be suppressed more. Moreover, the lower limit of the dynamic friction coefficient between the inner surface of the front plate 211 of the container and the wrap film wound body 110 is not particularly limited, but is preferably 0.15 or more. In this specification, the dynamic friction coefficient can be measured by the method described in the examples (the same applies hereinafter).

  A method for controlling the dynamic friction coefficient to be less than 0.28 is not particularly limited, and examples thereof include a method of forming a coating film with a varnish or the like on a predetermined surface. As the coating film, any conventionally known coating can be used, and can be appropriately selected according to the intended dynamic friction coefficient.

  As shown in FIG. 7, the dynamic friction coefficient between at least the central part 25 to 80% (area ratio) of the inner surface of the bottom plate 212, the rear plate 213, and the cover plate 214 of the container 200 and the wrap film wound body 110 is 0. 35 or more, preferably 0.37 or more, and more preferably 0.40 or more. As shown in FIG. 6, the coefficient of dynamic friction between the entire inner surface of the bottom plate 212, the rear plate 213, and the cover plate 214 of the container 200 and the wrap film wound body 110 may be 0.35 or more. The dynamic friction coefficient between the inner surface of the bottom plate 212, the rear plate 213, and the cover plate 214 of the container 200 and the wrap film wound body 110 is 0.35 or more, thereby suppressing vibration during distribution and use. Thus, it is possible to suppress the occurrence of damage to the surface layer of the wrap film wound body 110. Moreover, although the upper limit of the dynamic friction coefficient between the inner surface of the bottom plate 212, the rear plate 213, and the cover plate 214 of the container 200 and the wrap film wound body 110 is not particularly limited, 0.50 or less is preferable.

  The central part of the inner surface of the bottom plate 212, the rear plate 213, and the cover plate 214 of the container 200 is 25 to 80%, preferably 50 to 80%, and preferably 70 to 80% with respect to the total area. Is more preferable.

  The method for controlling the dynamic friction coefficient to be 0.35 or more is not particularly limited, and examples thereof include a method of forming a coating film with varnish or the like on a predetermined surface. As the coating film, any conventionally known coating can be used, and can be appropriately selected according to the intended dynamic friction coefficient.

  When winding the wrap film from the wound body, the wound body and the wound body container of the first embodiment are particularly reduced in tearing trouble at the initial stage of use, and improved in usability, and moreover, cutting the film It has excellent properties and drawability. Examples of the use include, but are not limited to, food packaging use and cooking use.

[Second Embodiment]
Next, the wrap film winding body which concerns on 2nd Embodiment is demonstrated. The wound body container according to the second embodiment is
A wound body container including a wrap film wound body, a cylindrical core body wound around the outer periphery of the wrap film wound body, and a housing body that houses the wrap film wound body,
The wrap film wound body is obtained by winding a wrap film containing a polyvinylidene chloride-based resin having a film thickness of 6 to 18 μm and a tear strength in the width direction of the film of the film forming line of 2 to 6 cN. Yes,
The width X (3) of the third lap from the winding end when not in use, the width X (5) of the third lap from the winding end when not in use, and when not in use The width length X (30) of the 30th lap from the winding end of
X (30) -1.0 mm <X (3)
X (30) -0.5mm <X (5)
The coefficient of dynamic friction between the central part 25 to 80% (area ratio) of the inner surface of the front plate of the container and the wrap film wound body is 0.35 or more.

  If it is such a wound body container, even if it is a case of using a wrap film wound body of the kari shoulder shape, by adjusting the dynamic friction coefficient between the wrap film wound body and the central portion of the container, Vibration during distribution and use can be suppressed, and the surface layer of the wrap film wound body is damaged by reducing the coefficient of dynamic friction at the end of the inner surface of the front plate of the container that comes into contact with the wound body end. Generation | occurrence | production can be suppressed. As a result, it is possible to suppress tearing troubles when pulling out the film from the wound body while maintaining drawability, adhesion and cutability.

[Wrap film roll and cylindrical core]
The wrap film wound body and the cylindrical core used in the second embodiment can be the same as those in the first embodiment.

[Container]
8 and 9 are developed views of the container used in the second embodiment. 8 and 9, the surface having a dynamic friction coefficient of less than 0.28 is indicated by thin shading, and the surface having a dynamic friction coefficient of 0.35 or more is indicated by dark shading. In the second embodiment, the dynamic friction coefficient between the central portion 25-80% (area ratio) of the inner surface of the front plate 211 of the container 200 and the wrap film wound body 110 is 0.35 or more, and 0.37. The above is preferable, and 0.40 or more is more preferable. The dynamic friction coefficient between the central portion 25 to 80% (area ratio) of the inner surface of the front plate 211 of the container 200 and the wrap film wound body 110 is 0.35 or more, thereby suppressing vibration during distribution and use. Thus, it is possible to further suppress the occurrence of damage to the surface layer of the wrap film roll 110. The dynamic friction coefficient can be controlled by the same method as described above.

  The central portion of the inner surface of the front plate 211 of the container 200 is 25 to 80%, preferably 50 to 80%, and more preferably 70 to 80% with respect to the total area of the front plate 211. When the central portion of the inner surface of the front plate 211 is 25% or more with respect to the total area of the front plate 211, the end portion (the shoulder portion) of the wrap film wound body 110 can come into contact with the inside of the container 200. Since the portion having a high dynamic friction coefficient becomes wider, vibration during distribution and use can be suppressed, and thereby, damage to the surface layer of the wrap film wound body 110 can be suppressed. . In addition, since the central portion of the inner surface of the front plate 211 is 80% or less with respect to the entire area of the front plate 211, the end portion of the wrap film wound body 110 (contact shoulder portion) contacts inside the housing body 200. When the part that has a low coefficient of dynamic friction that has the potential to spread is widened, the tearing trouble when pulling out the film from the roll film roll is suppressed and vibration is maintained while maintaining drawability, adhesion and cutability. Can be further suppressed.

  The coefficient of dynamic friction between the inner portion 25-80% (area ratio) of the inner surface of the bottom plate 212, the rear plate 213, and the cover plate 214 of the container 200 and the wrap film wound body 110 is preferably 0.35 or more, 0 .37 or more is more preferable, and 0.40 or more is more preferable. Since the dynamic friction coefficient between the center part 25 to 80% (area ratio) of the inner surface of the bottom plate 212, the rear plate 213, and the cover plate 214 of the container 200 and the wrap film wound body 110 is 0.35 or more, the circulation And vibration during use can be suppressed, and this tends to further suppress the occurrence of damage to the surface layer of the wrapped wrap film 110. The dynamic friction coefficient can be controlled by the same method as described above.

  The central part of the inner surface of the bottom plate 212, the rear plate 213, and the lid plate 214 of the container 200 is 25 to 80% of the total area of the bottom plate 212, the rear plate 213, or the lid plate 214, respectively. Preferably, 50 to 80% is more preferable, and 70 to 80% is more preferable. When the central portion of the inner surface of the bottom plate 212, the rear plate 213, or the lid plate 214 is within the above range, it is possible to further suppress the tearing trouble when the film is pulled out from the wrap film wound body 110.

  The coefficient of dynamic friction between the outer side of the center part of the front plate 211, the bottom plate 212, the rear plate 213, and the cover plate 214 of the container 200 and the wrap film wound body 110 is preferably less than 0.28, and preferably 0.26 or less. More preferred is 0.25 or less. Since the dynamic friction coefficient between the outer side of the center part of the front plate 211, the bottom plate 212, the rear plate 213, and the cover plate 214 of the container 200 and the wrap film wound body 110 is less than 0.28, Further, it is possible to suppress the wrap film wound body 110 from being damaged outside the center portion of the front plate 211, the bottom plate 212, the rear plate 213, and the lid plate 214. As a result, there is a tendency that tearing troubles when pulling out the film from the wound body can be further suppressed while maintaining drawability, adhesion, and cutability. The dynamic friction coefficient can be controlled by the same method as described above.

  The wound body and the wound body container according to the second embodiment have reduced tearing trouble in the initial stage of use when pulling out the wrap film from the wound body, improved usability, and cut the film. It has excellent properties and drawability. Examples of the use include, but are not limited to, food packaging use and cooking use.

  EXAMPLES Hereinafter, although an Example, a comparative example, and a reference example demonstrate this invention further more concretely, this invention is not limited at all by these. Evaluation methods used in Examples, Comparative Examples, and Reference Examples are as follows.

(Evaluation method)
(1. Tear trouble occurrence rate)
Assuming distribution of the wrap film after shipment and storage at home, the wound wrap film immediately after production was stored in a thermostatic bath set at 28 ° C. for 1 month. Then, in order to reproduce the vibration at the time of distribution, the wrap film winding body accommodated in the container was vibrated using a vibration tester (product number “BF-50UC” manufactured by IDEX Co., Ltd.). The vibration test was performed as follows.

  First, a cardboard box (inside a 60 box wound body containing one wound body in one rectangular parallelepiped container (inside of a decorative box; 42 mm × 42 mm × about 233 mm) is formed so that a gap is not formed. (28 cm × 46 cm × 24 cm), and the belt was fixed to the vibration table with a belt so that the longitudinal direction of the wound body was perpendicular to the vibration table. A vibration test was performed by operating a vibration tester in an atmosphere of 23 ° C. and a relative humidity of 50% RH. The vibration test was performed for 20 minutes in a cycle in which the frequency was changed in the order of 5 Hz, 30 Hz, and 5 Hz in 30 seconds using the auto mode.

  After the vibration test, a tearing trouble evaluation was performed in an atmosphere of 23 ° C. and a relative humidity of 50% RH. As an evaluator, 100 people who use wrapping films for food packaging on a daily basis were selected. The evaluator performed a series of operations 30 times each after drawing the film 50 cm from the wound body having a width of about 23 cm accommodated in the container, and then cutting the film with a tin film cutting blade attached to the decorative box. That is, out of a total of 3000 times of 100 people in 30 times, when the film was pulled out from the wound body, tearing occurred and the film tear trouble occurrence rate was derived from the number of times the film could not be pulled out smoothly.

The occurrence rate of film tearing troubles was evaluated in the following five stages.
A: The occurrence rate of tearing trouble is less than 5%. There is almost no tearing trouble and it is very easy to use.
○: The occurrence rate of tearing trouble is 5% or more and less than 10%. There are few tearing troubles and it is easy to use.
●: Cracking occurrence rate is 10% or more and less than 15%. There is not much tearing trouble and it is easy to use. Δ: The incidence of tearing trouble is 15% or more and less than 20%. There are a lot of tearing troubles, and usability is bad.
X: The occurrence rate of tearing troubles is 20% or more. There are a lot of tearing troubles and the usability is very bad.

(2. Cut property)
Assuming distribution of the wrap film after shipment and storage at home, the wound wrap film immediately after production was stored in a thermostatic bath set at 28 ° C. for 1 month. Then, the cut property of the film was evaluated.

The evaluation was performed in an atmosphere of 23 ° C. and a relative humidity of 50% RH. As an evaluator, 100 people who use wrapping films for food packaging on a daily basis were selected. The evaluator pulled out the film 50 cm from the wound body having a width of about 23 cm accommodated in the container, and then repeated a series of operations 30 times for cutting the film with a tin film cutting blade attached to the decorative box 30 times. The ease of cutting (cutting) of the film was scored by 5 points per person based on the following evaluation criteria.
5 points: No resistance is felt during film cutting.
4 points: Little resistance is felt when the film is cut.
3 points: A slight resistance is felt when the film is cut.
2 points: Resistance is felt when the film is cut.
1 point: A large resistance is felt when the film is cut.

The cut property was evaluated in the following five steps based on the total score of 100 people.
A: The total score is 400 points or more. The film can be cut very easily.
○: The total score is 300 or more and less than 400. The film can be easily cut. ●: The total score is 250 or more and less than 300. I feel a little resistance when cutting the film.
Δ: The total score is 200 or more and less than 250. Resistance is felt when cutting the film, and the cutability is poor.
X: The total score is less than 200 points. A large resistance is felt when cutting the film, and the cutability is very poor.

(3. Drawability)
Assuming distribution of the wrap film after shipment and storage at home, the wound wrap film immediately after production was stored in a thermostatic bath set at 28 ° C. for 1 month. Thereafter, the drawability of the film was evaluated.

The evaluation was performed in an atmosphere of 23 ° C. and a relative humidity of 50% RH. As an evaluator, 100 people who use wrapping films for food packaging on a daily basis were selected. The evaluator has a width 2 accommodated in the container.
After drawing the film 50 cm from the 2 cm wound body, a series of operations of cutting the film with a tin film cutting blade attached to the decorative box was repeated 10 times. The ease of drawing out the film was scored at 5 points per person based on the following evaluation criteria.
5 points: No resistance is felt when the film is pulled out.
4 points: Little resistance is felt when pulling out the film.
3 points: A slight resistance is felt when the film is pulled out.
2 points: Resistance is felt when the film is pulled out.
1 point: A large resistance is felt when the film is pulled out.

The drawability was evaluated according to the following five levels based on the total score of 100 people.
A: 400 points or more. The film can be pulled out very easily and smoothly.
○: 300 points or more and less than 400 points. The film can be pulled out easily and smoothly.
●: 250 or more and less than 300. The film can be pulled out easily.
Δ: 200 points or more and less than 250 points. The resistance is felt when the film is pulled out, and the pulling out property is bad.
X: Less than 200 points. A large resistance is felt when the film is pulled out, and the pulling out property is very bad.

[Example 1]
(Wrap film roll)
Weight average molecular weight 90,000 vinylidene chloride resin (hereinafter also referred to as “PVDC”) containing 90% by mass of vinylidene chloride units and 10% by mass of vinyl chloride units, ATBC (tributyl acetyl citrate, Taoka Chemical Industries) Co., Ltd.), epoxidized soybean oil (trade name “Newsizer 510R”, manufactured by Nippon Oil & Fats Co., Ltd.) were mixed at a ratio of 93.4% by mass, 5.5% by mass and 1.1% by mass, respectively A total of 5 kg was mixed with a Henschel mixer for 5 minutes and aged for 24 hours or more to obtain a vinylidene chloride resin composition.

The above-mentioned vinylidene chloride resin composition is supplied to a melt extruder and melted, and the temperature of the melt resin composition at the slit exit of an annular die attached to the tip of the extruder is 170 ° C. While adjusting the heating conditions, it was extruded in an annular shape at an extrusion rate of 10 kg / hr. After this was supercooled, it was stretched 4.1 times in MD and 5.6 times in TD by inflation stretching to obtain a tubular film. After this cylindrical film is nipped and folded flat, the film is relaxed by 10% on the MD by controlling the speed ratio between the nip roll and the take-up roll, and a two-layer film with a folding width of 280 mm is taken up at a winding speed of 18 m. It wound up at / min. The film was rewound onto a first paper tube having an outer diameter of 92 mm while being slit to a width of 227 mm and peeled to form a single film. After that, the film thickness is 11 μm by winding the film around a second paper tube having an outer diameter of 36 mm and a length of 230 mm, which is a cylindrical core, while rewinding the film from the first paper tube. A wound body having was obtained. The film thickness was measured according to JIS-K-7130 (1999). The tear strength was measured according to JIS-P-8116 (2000).
X (3) = -0.20mm
X (5) = 0.0 mm
X1 (3) = − 0.10mm
X1 (5) = 0.0 mm
X2 (3) = − 0.10 mm
X2 (5) = 0.0 mm

  Note that X1 (3), X1 (5), and X1 (30) are one wound body in which the wound body is cut in the vicinity of the center of the wound body so as to be orthogonal to TD and divided into two. Are equivalent to Xi (3), Xi (5), and Xi (30), respectively, and X2 (3), X2 (5), and X2 (30) are divided into two parts. In the round body, they corresponded to Xi (3), Xi (5), and Xi (30), respectively (the same applies hereinafter). Each evaluation result is shown in Table 1. In the table, the numerical values of X (3) and X (5) are numerical values indicating how short they are with respect to X (30), and the numerical values of X1 (3) and X1 (5) are X1 (30). The numerical values of X2 (3) and X2 (5) are numerical values indicating how short they are with respect to X2 (30) (the same applies hereinafter).

(Container)
A paper container (decorative box: inner dimensions 42 mm × 42 mm × 231.5 mm) having the shape shown in FIG. 4 was prepared. As shown in FIG. 6, an acrylic release varnish is applied to the inner surface of the front plate of the container, and the acrylic non-slip varnish is applied to the inner surface of the bottom plate, the rear plate, and the cover plate of the container. Was applied. The dynamic friction coefficient between the entire inner surface of the front plate of the container and the wrapped wrap film is 0.26, and the dynamic friction coefficient between the entire inner surface of the bottom plate, the rear plate and the cover plate of the container and the wound wrap film is 0. 37. The dynamic friction coefficient was measured according to JIS-K-7125 (the same applies hereinafter).

(Wound body container)
The wrap film wound body obtained as described above was housed in a housing body to obtain a wound body housing body of Example 1. The difference (W−S) between the axial length S (mm) of the cylindrical body and the minimum value W (mm) of the inner dimension between the side plates in the longitudinal direction of the container was 1.5 mm.

[Examples 2 to 5]
A wound body was obtained in the same manner as in Example 1 except that the film thickness and tear strength were adjusted as shown in Table 1. This wound body was housed in the following housing body so that (WS) became the value shown in Table 1, and the wound body housing bodies of Examples 2 to 5 were obtained. The evaluation results are shown in Table 1.

(Container)
A paper container (decorative box: inner dimensions 42 mm × 42 mm × 231.5 mm) having the shape shown in FIG. 4 was prepared. As shown in FIG. 6, the coefficient of dynamic friction between the entire inner surface of the front plate of the container and the wrap film winding body is 0.26, and the entire inner surface of the bottom plate, rear plate, and lid plate of the container and the wrap film winding The coefficient of dynamic friction with the body was 0.37.

[Examples 6 to 9]
A wound body was obtained in the same manner as in Example 1 except that the film thickness and tear strength were adjusted as shown in Table 1. This wound body was housed in the following housing body so that (WS) became the value shown in Table 1, and the wound body housing bodies of Examples 6 to 9 were obtained. The evaluation results are shown in Table 1.

(Container)
A paper container (decorative box: inner dimensions 42 mm × 42 mm × 231.5 mm) having the shape shown in FIG. 4 was prepared. As shown in FIG. 7, the coefficient of dynamic friction between the entire inner surface of the front plate of the container and the wrap film wound body is 0.26, and the center portion of the inner surface of the bottom plate, the rear plate, and the cover plate of the container and the wrap film The dynamic friction coefficient with the wound body was 0.37, and the dynamic friction coefficient between the part other than the center of the inner surface of the bottom plate, the rear plate, and the cover plate of the container and the wrapped wrap film was 0.26.

[Examples 10 to 16]
A wound body was obtained in the same manner as in Example 1 except that the film thickness and tear strength were adjusted as shown in Table 1. This wound body was housed in the following housing body so that (WS) became the value shown in Table 1, and the wound body housing bodies of Examples 10 to 16 were obtained. The evaluation results are shown in Table 1.

(Container)
A paper container (decorative box: inner dimensions 42 mm × 42 mm × 231.5 mm) having the shape shown in FIG. 4 was prepared. As shown in FIG. 8, the dynamic friction coefficient between the central portion of the inner surface of the front plate of the container and the wrap film wound body is 0.37 or 0.40, and the portion other than the center of the inner surface of the front plate of the container is The coefficient of dynamic friction with the wrap film roll is 0.24 or 0.26, and the coefficient of dynamic friction between the entire inner surface of the bottom plate, rear plate, and lid plate of the container and the wrap film roll is 0.37 or 0.00. 40.

[Examples 17 to 23]
A wound body was obtained in the same manner as in Example 1 except that the film thickness and tear strength were adjusted as shown in Table 1. This wound body was housed in the following housing body so that (WS) became the value shown in Table 1, and the wound body housing bodies of Examples 17 to 23 were obtained. The evaluation results are shown in Table 1.

(Container)
A paper container (decorative box: inner dimensions 42 mm × 42 mm × 231.5 mm) having the shape shown in FIG. 4 was prepared. As shown in FIG. 9, the dynamic friction coefficient between the central portion of the inner surface of the front plate of the container and the wrap film wound body is 0.37 or 0.40, and the portion other than the center of the inner surface of the front plate of the container is The coefficient of dynamic friction with the wrap film roll is 0.24 or 0.26, and the coefficient of dynamic friction between the center part of the inner surface of the bottom plate, rear plate, and lid plate of the container and the wrap film roll is 0.37 or 0.40, and the coefficient of dynamic friction between the part other than the center of the inner surface of the bottom plate, the rear plate, and the lid plate of the container and the wrap film wound body was 0.24 or 0.26.

[Comparative Examples 1 to 10]
A wound body was obtained in the same manner as in Example 1 except that the film thickness and tear strength were adjusted as shown in Table 1. This wound body was accommodated in the following container so that (WS) became the value shown in Table 1, and the wound body containers of Comparative Examples 1 to 10 were obtained. The evaluation results are shown in Table 1.

(Container)
A paper container (decorative box: inner dimensions 42 mm × 42 mm × 231.5 mm) having the shape shown in FIG. 4 was prepared. As shown in Table 1, the coefficient of dynamic friction between the entire inner surface of the front plate of the container and the wrap film wound body, the coefficient of dynamic friction between the entire inner surface of the container bottom plate, the rear plate, and the cover plate and the wound wrap film. Adjusted.

  The wound body and the wound body container of the present invention have reduced tearing troubles in the initial stage of use when the film is pulled out from the wound body, and the usability has been improved. Therefore, it can be used widely and effectively for food packaging and cooking.

  DESCRIPTION OF SYMBOLS 1 ... Extruder, 2 ... Die, 3 ... Die mouth, 4 ... Sock, 5 ... Sock liquid, 6 ... Cold water tank, 7 ... 1st pinch roll, 8 ... Parison, 8 ... Parison again, 9 ... 2nd pinch roll DESCRIPTION OF SYMBOLS 10 ... Bubble, 11 ... 3rd pinch roll, 12 ... Double ply film, 13 ... Winding roll, 110 ... Wrap film winding body, 110a ... Wrap film, 110b ... Winding end, 110d ... Winding body, 110e DESCRIPTION OF SYMBOLS ... Winding body, 110f ... End surface, 120 ... Cylindrical core body, 200 ... Winding body container, 200K ... Film cutting blade, 210 ... Container, 211 ... Front plate, 212 ... Bottom plate, 213 ... Rear plate, 214 ... Lid plate, 215 ... Lid piece, 218 ... Side plate, 221 ... Side lid piece, 223 ... Storage chamber, 224 ... Lid, F ... Crystal orientation, MC ... Cut surface, TD ... Width direction of film on the film forming line .

Claims (4)

A wound body container including a wrap film wound body, a cylindrical core body around which the wrap film wound body is wound, and a housing body that houses the wrap film wound body,
The wrap film wound body has a film thickness of 6 to 18 μm and a wrap film containing a polyvinylidene chloride-based resin having a tear strength of 2 to 6 cN in the width direction of the film of the film forming line. And
Width of the wrap film wound body X (3) of the third turn from the winding end when not in use, width length X (5) of the fifth turn from the winding end when not in use, unused The width length X (30) of the 30th lap from the winding end of time satisfies the following formulas (A1) and (B1),
X (30) -1.0 mm <X (3) (A1)
X (30) −0.5 mm <X (5) (B1)
The dynamic friction coefficient between the inner surface of the front plate of the container and the wrap film wound body is less than 0.28, and at least the central part of the inner surface of the bottom plate, the rear plate, and the cover plate of the container is 25 to 80%. (Area ratio) and the dynamic friction coefficient of the wrap film wound body is 0.35 or more,
Winding body container. A wound body container including a wrap film wound body, a cylindrical core body around which the wrap film wound body is wound, and a housing body that houses the wrap film wound body,
The wrapping film wound body is a wrapping film containing a polyvinylidene chloride resin having a film thickness of 6 to 18 μm and a tear strength in the width direction of the film of the film forming line of 2 to 6 cN. And
The wrap film wound body has a width X (3) of the third turn from the winding end when not used, a width length X (5) of the third turn from the winding end when not used, and the unused. The width length X (30) of the 30th lap from the winding end of time satisfies the following formulas (A1) and (B1),
X (30) -1.0 mm <X (3) (A1)
X (30) −0.5 mm <X (5) (B1)
A wound body container having a dynamic friction coefficient of 0.35 or more between a central part of the inner surface of the front plate of the container body of 25 to 80% (area ratio) and the wrap film wound body. The coefficient of dynamic friction between the bottom plate of the container, the rear plate, and the center portion of the inner surface of the cover plate of 25 to 80% (area ratio) and the wrap film wound body is 0.35 or more,
The dynamic friction coefficient between the outer side of the center part of the front plate, the bottom plate, the rear plate, and the cover plate and the wrap film wound body is less than 0.28.
The wound body container according to claim 2. The axial length S (mm) of the cylindrical core and the minimum value W (mm) of the inner dimension between the side plates in the longitudinal direction of the container satisfy the following formula (E1). The wound body container according to any one of the preceding claims.
1 mm <W−S ≦ 3 mm (E1)