JP2014234271A - Wrap film wound body and wound body housing - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wrap film wound body which suppresses tear trouble when drawing out film from a wound body upon the initial use while maintaining the cut property and drawing property of the wrap film at a high level.SOLUTION: A wrap film wound body having predetermined tear strength in the film thickness and width directions, when width length of a wrap film of 30 rounds from a winding edge at unused time is presented as Y (unit:mm), width length X(3) of the wrap film of 3 rounds from the winding edge, width length X(5) of the wrap film of 5 rounds and width length X(10) of the wrap film of 10 rounds (in any cases, unit:mm) respectively satisfy such conditions as to be represented by Y-3.0≤X(3)≤Y-1.0, Y-2.0≤X(5)≤Y-0.5, Y-1.5≤X(10)<Y, and satisfy such conditions as to be represented by X(3)<X(5)<X(10).

Description

  The present invention relates to a wrap film wound body and 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 substantially without a 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 the film from the wound body and when picking out the end of the film that has been rewound into the container (decorative box) containing the wound body. It is a trouble that the film is torn and normal use is difficult. For this problem, for example, it is possible to make it difficult to tear by a technique such as thickening the film. However, by making the film thicker, there is room for further improvement in usability, such as a decrease in cutability, a decrease in adhesion performance due to a decrease in followability to a packaging object, 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. In this way, by making the gap between the container and the wound body in the longitudinal direction substantially zero, vibration of the wound body inside the container hardly occurs, so 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, when the wrap film was pulled out, it was found that the contact between the cylindrical core and the inner wall surface of the container (container) and the friction increased, and there was room for further improvement in the drawability.

  Therefore, it can be said that such a wrap film is extremely useful if it can solve both seemingly conflicting problems such as prevention of wrap film tearing troubles and improvement of drawability, adhesion, and cutability.

  The present invention has been made in view of the above circumstances, and is a wrap that suppresses tearing troubles when pulling a film from a wound body in the initial stage of use while maintaining the cutability and drawability of the wrap film at a high level. It aims at providing the film winding body and the winding body container which accommodated the winding body.

  As a result of paying attention to the tearing trouble that occurs when using the wound body, the present inventors have found that the cause of the tear is damage generated on the surface layer of the wound body due to vibration during distribution and use. I found. As a result of diligent investigation for this cause, by making the shape of the film end in the wound body into a specific shape, it is possible to suppress tearing troubles to a level that satisfies consumer demands, and the drawability of the film And it discovered that the wrap film winding body excellent also in cut property was obtained, and came to complete this invention.

That is, the present invention is as follows.
[1] A wrap film wound body including a wrap film having a film thickness of 6 to 18 μm and a tear strength in the film width direction of 2.0 to 6.0 cN, and a winding end when not used When the width length X (30) [unit: mm] of the wrap film on the 30th turn from Y is Y, the width length X (3) [unit: mm] of the wrap film on the third turn from the winding end. ] Is the following formula (1):
Y-3.0 ≦ X (3) ≦ Y-1.0 (1)
The width length X (5) [unit: mm] of the wrap film in the fifth turn from the winding end is expressed by the following formula (2):
Y−2.0 ≦ X (5) ≦ Y−0.5 (2)
The width length X (10) [unit: mm] of the wrap film on the 10th turn from the winding end is expressed by the following formula (3):
Y−1.5 ≦ X (10) <Y (3)
And the widths X (3), X (5) and X (10) are represented by the following formula (4):
X (3) <X (5) <X (10) (4)
A wound body that satisfies the conditions represented by
[2] In each wound body obtained by cutting the wound body so as to be orthogonal to the film width direction of the wrap film and dividing it into two, the width of the wrap film on the 30th turn from the winding end When the length Xi (30) [unit: mm] is Yi, the width length Xi (3) [unit: mm] of the wrap film on the third turn from the winding end is expressed by the following formula (1A):
Yi−2.5 ≦ Xi (3) ≦ Yi−0.5 (1A)
The width length Xi (5) [unit: mm] of the wrap film on the fifth turn from the winding end is expressed by the following formula (2A):
Yi-1.75 ≦ Xi (5) ≦ Yi−0.25 (2A)
The width length Xi (10) [unit: mm] of the wrap film on the 10th turn from the winding end is expressed by the following formula (3A):
Yi-1.5 <Xi (10) <Yi (3A)
And the widths Xi (3), Xi (5) and Xi (10) are represented by the following formula (4A):
Xi (3) <Xi (5) <Xi (10) (4A)
The wound body according to the above [1], which satisfies a condition represented by:
[3] The wound body according to [1] or [2], in which the wrap film includes a vinylidene chloride resin.
[4] The wrap film wound body according to any one of the above [1] to [3], a cylindrical core wound around the outer periphery of the wrap film wound body, and the wrap film wound body And a container containing the cylindrical core body, wherein the cylindrical body includes an axial length S (unit: mm) between the side plate in the longitudinal direction of the container. The minimum value W [unit: mm] is the following formula (5):
1 <W−S ≦ 3 (5)
A wound body container that satisfies the condition represented by

  According to the present invention, the wrap film wound body that suppresses the tearing trouble when the film is pulled out from the wound body in the initial stage of use while maintaining the cutability and the drawability of the wrap film at a high level, and the winding thereof A wound body container that houses a body can be provided.

It is the schematic for demonstrating the width length in a wrap film winding body. It is another schematic diagram for demonstrating the width length in a wrap film winding body. It is the schematic which shows an example of the apparatus used when manufacturing the wrap film which concerns on this invention. It is the schematic which shows an example of the wrap film winding body container which concerns on this invention. It is the schematic for demonstrating the relationship between the axial length S of the cylindrical core body which concerns on this invention, and the minimum value W of the internal dimension between the side plates of a container.

  Hereinafter, a mode for carrying out the present invention (hereinafter referred to as “the present embodiment”) will be described in detail with reference to the drawings as necessary. However, the present invention is limited to the following embodiment. However, the present invention can be implemented with various modifications 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.

The wrap film winding body of the present embodiment (hereinafter also simply referred to as “winding body”) has a film thickness of 6 to 18 μm and a tear strength in the film width direction of 2.0 to 6.0 cN. When the width length X (30) (unit: mm) of the wrap film on the 30th lap from the winding end when equipped with a wrap film is Y, the wrap film on the third lap from the winding end The width X (3) [unit: mm] is the following formula (1):
Y-3.0 ≦ X (3) ≦ Y-1.0 (1)
The width length X (5) [unit: mm] of the wrap film on the fifth turn from the winding end is the following formula (2):
Y−2.0 ≦ X (5) ≦ Y−0.5 (2)
The width length X (10) [unit: mm] of the wrap film on the 10th turn from the winding end is the following formula (3):
Y−1.5 ≦ X (10) <Y (3)
And the widths X (3), X (5) and X (10) are represented by the following formula (4):
X (3) <X (5) <X (10) (4)
A wound body that satisfies the condition represented by

In addition, the wrap film wound body of the present embodiment is cut 30 times from the winding end in each of the wound bodies that are cut and divided into two so as to be orthogonal to the film width direction in the wrap film. When the width length Xi (30) [unit: mm] of the eye wrap film is set to Yi, the width length Xi (3) [unit: mm] of the third wrap film from the winding end is expressed by the following formula ( 1A):
Yi−2.5 ≦ Xi (3) ≦ Yi−0.5 (1A)
The width length Xi (5) [unit: mm] of the wrap film on the fifth turn from the winding end is expressed by the following formula (2A):
Yi-1.75 ≦ Xi (5) ≦ Yi−0.25 (2A)
The width length Xi (10) [unit: mm] of the wrap film on the 10th turn from the winding end is the following formula (3A):
Yi-1.5 <Xi (10) <Yi (3A)
And the width lengths Xi (3), Xi (5) and Xi (10) are represented by the following formula (4A):
Xi (3) <Xi (5) <Xi (10) (4A)
It is preferable that the condition represented by

  FIG. 1 and FIG. 2 are schematic views for explaining the relationship between the widths in the wound body, and the wound body of this embodiment is not limited to the illustrated one. 1 and 2 show a wound body 110 and a cylindrical core body 120 (hereinafter also simply referred to as “core body”) 120 around which the wound body 110 is wound. The wound body 110 is formed by winding a wrap film (hereinafter also simply referred to as “film”) 110a around a core body 120, and has a wound end 110b on the outermost periphery thereof. As is clear from the fact that the end face of the winding end 110b of the film 110a appears on the near side of FIG. 1, the film 110a has a cylindrical core when viewed from the direction of the arrow D in FIGS. Winding body 110 is formed by winding in the direction opposite to the clockwise direction from 120 to the outermost periphery.

  The material of the film 110a is not particularly limited, and may be a material conventionally used for a wrap film, for example, a resin. However, from the viewpoint of achieving the object of the present invention more effectively and reliably, it includes a vinylidene chloride resin. Is preferred. The vinylidene chloride resin is not particularly limited as long as it contains a vinylidene chloride unit, and may be a conventionally known one. The monomer unit contained in the vinylidene chloride resin includes, for example, acrylic acid esters such as vinyl chloride, methyl acrylate and butyl acrylate; methacrylic acid esters such as methyl methacrylate and butyl methacrylate; and acrylonitrile. And vinyl acetate. One or two or more of these monomer units copolymerizable with vinylidene chloride may be copolymerized. When the vinylidene chloride-based resin has a vinylidene chloride unit at a ratio of 72% by mass or more, the glass transition temperature of the vinylidene chloride-based resin can be suppressed, and as a result, the film can be used when used in a low temperature environment such as winter. It can be prevented from becoming brittle and easy to tear. On the other hand, when the vinylidene chloride-based resin has a vinylidene chloride unit at a ratio of 93% by mass or less, a significant increase in crystallinity can be suppressed. As a result, the moldability during film stretching can be maintained at a higher level. From this viewpoint, the vinylidene chloride resin preferably has 72 to 93% by mass of vinylidene chloride units, and more preferably 81 to 90% by mass.

  In addition, as long as the effects of the present invention are not impaired, the vinylidene chloride-based resin, plasticizers used for known food packaging materials, stabilizers, weather resistance improvers, colorants such as dyes or pigments, antifogging, etc. A vinylidene chloride-based resin composition to which an agent, an antibacterial agent, a lubricant, a nucleating agent, or the like is added may be used. These are used singly 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.

  When the vinylidene chloride resin composition is used, the content of the vinylidene chloride resin in the composition is not particularly limited as long as the effect of the present invention is not impaired, and is preferably 80% by mass or more, and 85% by mass. The above is more preferable, 90% by mass or more is further preferable, and 92% by mass or more is particularly preferable.

  The method for producing the wrap film of the present embodiment is not particularly limited, and may be a conventionally known method. For example, the film is obtained by being melt-extruded from an extruder and then stretched and wound around a core. For example, an inflation method or a tenter method can be used as a method for forming and stretching a molten resin. In order to improve the cut property of the wrap film, the film width direction (hereinafter, also simply referred to as “TD”) during stretching is particularly controlled, and the TD tear strength (hereinafter referred to as “TD tear strength”) obtained thereby. Is also an important factor. The TD tear strength is deeply related to the cut property, and the wrap film is preferably 2.0 to 6.0 cN. The reason will be described in detail below. The tear strength measurement method described here is based on JIS-P-8116 (2000).

  When the TD tear strength of the wrap film is 6.0 cN or less, the conventional wound body is likely to cause tearing troubles when the film is pulled out, starting from damage to the film end due to vibration. However, in the present embodiment, film tearing troubles can be suppressed due to factors detailed later. On the other hand, in this embodiment, since 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 cut property becomes better and the usability is better. Have. Considering these comprehensively, the TD tear strength is preferably 6 cN or less. On the other hand, if the TD tear strength is 2.0 cN or more, the film is more difficult to tear if the damage is smaller than the damage caused by vibration. Therefore, the TD tear strength is preferably 2.0 cN or more. From the above, the TD tear strength is preferably in the range of 2.0 to 6.0 cN, and more preferably in the range of 2.3 to 5.0 cN.

  The stretched film is stretched to a thickness suitable for the wrap film. In the conventional wound body, when the thickness of the wrap film is 18 μm or less, the tear strength becomes smaller. Therefore, when the film is pulled out from the wound body, and the film end that is rewound into the container (decorative box) When picking up the film, a tearing trouble that the film tears from the end portion that appears by cutting with a cutting blade attached to the decorative box tends to occur. However, in the present embodiment, film tearing troubles can be suppressed due to factors detailed later. In addition, when the film thickness is 18 μm or less, the force required to cut the film with the film cutting blade can be reduced, so that 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. On the other hand, in this embodiment, since the fall of the tensile stress of a film can be suppressed as the thickness of a wrap film is 6 micrometers or more, the film piece at the time of use can be prevented. Considering these comprehensively, the thickness of the wrap film is particularly 6 to 18 μm, preferably 8 from the viewpoint of achieving excellent balance of film breakage, cutability, drawability, and adhesion. It is -15 micrometers, More preferably, it is 9-12 micrometers.

  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 present embodiment. FIG. 3 is a schematic view showing an example of a method for producing a wrap film according to the present embodiment.

  First, a melted vinylidene chloride resin or a vinylidene chloride resin composition (hereinafter simply referred to as “vinylidene chloride resin etc.”) is extruded into a tubular shape from a die port 3 of a circular die 2 by an extruder 1. A sock 4 made of vinylidene chloride resin or the like is formed.

  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.

  As the sock liquid 5, water, mineral oil, alcohols, polyhydric alcohols such as propylene glycol and glycerin, and cellulose-based and polyvinyl alcohol-based aqueous solutions can be used. These may be used alone or in combination of two or more. In addition, a weather resistance improver, an antifogging agent, an antibacterial agent, and the like used in conventional food packaging materials may be added to the sock solution as long as the effects of the present embodiment are not impaired.

  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 property of the parison and the adhesion of the film. 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 producing a wrap film of the present embodiment, and a wrap film may be produced according to various apparatus configurations and conditions other than those described above. For example, other known methods may be employed. Good.

  The wound body 110 of the present embodiment may exist in a state of being wound around the 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.

Referring to FIG. 1, in this embodiment, when the width length X (30) [unit: mm] of the wrap film 110a on the 30th lap from the winding end 110b when not in use is Y, the winding end The width length X (3) [unit: mm] of the wrap film 110a in the third round from 110b is expressed by the following formula (1):
Y-3.0 ≦ X (3) ≦ Y-1.0 (1)
The width length X (5) [unit: mm] of the wrap film 110a in the fifth turn from the winding end 110b is expressed by the following formula (2):
Y−2.0 ≦ X (5) ≦ Y−0.5 (2)
The width length X (10) [unit: mm] of the wrap film 110a on the tenth turn from the winding end 110b is the following formula (3):
Y−1.5 ≦ X (10) <Y (3)
And the width lengths Xi (3), Xi (5) and Xi (10) are represented by the following formula (4A):
X (3) <X (5) <X (10) (4)
It is necessary to satisfy the condition expressed by

Referring to FIG. 2, the wound body 110 includes the wound bodies 110 d and 110 e obtained by cutting the wound body 110 at the cut surface MC so as to be orthogonal to the TD in the wrap film 110 a and dividing the wound body 110 into two. , When the width length Xi (30) [unit: mm] of the 30th turn from the winding end 110b of the wrap film 110a when unused is Yi, the wrap film 110a on the third turn from the winding end 110b The width length Xi (3) [unit: mm] of the following formula (1A):
Yi−2.5 ≦ Xi (3) ≦ Yi−0.5 (1A)
The width length Xi (5) [unit: mm] of the wrap film 110a in the fifth turn from the winding end 110b is expressed by the following formula (2A):
Yi-1.75 ≦ Xi (5) ≦ Yi−0.25 (2A)
The width length Xi (10) [unit: mm] of the wrap film 110a on the tenth turn from the winding end 110b is expressed by the following formula (3A):
Yi-1.5 <Xi (10) <Yi (3A)
And the width lengths Xi (3), Xi (5) and Xi (10) are represented by the following formula (4A):
Xi (3) <Xi (5) <Xi (10) (4A)
It is preferable that the condition represented by In each wound body divided into two, Xi (3), Xi (5), Xi (10) and Xi (30) (ie Yi) may be different from each other or the same. .

  As a measuring method of each width length, after cutting the wound body 110 so as to be orthogonal to TD as necessary, the wrap film 110a is actually drawn out from the wound body 110 (or the divided wound body) and wound. The length at TD of the film 110a corresponding to the third, fifth, tenth and thirty laps from the turning end 110b is measured. At that time, the measurement is performed so that wrinkles are not formed at the measurement location of the film 110a and the film 110a is not stretched by applying an excessive force.

  As a method of manufacturing the wound body 110 having such a shape, for example, at least one side of the TD of the film before being wound so that the width becomes shorter from the center of the wound body 110 toward the outermost periphery. Method of winding (winding) the film around the core from the longer TD length after obliquely cutting and trimming so that the TD length gradually decreases from one end to the other end of the MD Winding the film around the core and gradually increasing the tensile stress on the MD of the film to shrink to TD; or winding the film around the core to obtain a wound body, and then winding the wound body at a high temperature. By storing, the method of shrinking the film in the wound body more greatly on the outer peripheral side than on the core side can be mentioned. However, the method is not particularly limited.

  In this way, by winding a film whose width is gradually shortened toward the outermost periphery of the wound body 110 around the core body, at least one of the TD end surfaces 110f of the wound body 110 is gentle so-called taper. It becomes a shape. Thus, when the wound body 110 vibrates inside the wound body container due to vibration during distribution or use, the winding is performed when the outermost periphery of the wound body 110 contacts the inner wall surface of the container. Locations of the body 110 that receive impact can be dispersed. As a result, the amount of minute damage generated on the wound body 110, particularly the TD end face 110f, can be reduced, and tearing troubles starting from the minute damage can be greatly reduced. Further, the TD end surface 110f of the wound body 110 preferably has a gently tapered shape at both ends as shown in the figure, but only one of the ends may be tapered.

  As a result of detailed examination of the occurrence of minute damage due to vibration during transportation of the conventional wound body by the present inventors, mainly the tenth layer from the outermost periphery, that is, from the winding end 110b to the tenth turn. It was confirmed that damage was more likely to occur compared to other wound layer regions. As a countermeasure against this, specifically, it is effective to make the TD end surface 110f of the wound body 110 gently have a specific taper shape at least from the winding end 110b to the tenth turn. The present inventors have found that. On the other hand, in the case of a conventional wound body in which the TD end surface does not have such a shape, the tendency of occurrence of damage due to vibration is not sufficiently suppressed, and as a result, a tear that may occur when the film is pulled out from the wound body. It was also found that trouble was one of the factors that occurred at the conventional level. It has also been found that such tearing troubles are easily manifested particularly when a vinylidene chloride resin is used as a film material.

  Next, the wound body container of this embodiment will be described. FIG. 4 is a schematic view showing an example of the wound body container of the present embodiment. The wound body container 200 of the present embodiment includes a wound body 110, a cylindrical core body 120 around which the wound body 110 is wound, and a container that houses the wound body 110 and the cylindrical core body 120. 210. The container 210 includes a rectangular parallelepiped housing chamber 223 formed by the wall surfaces of the front plate 211, the bottom plate 212, the rear plate 213, and the side plates 218, and a direction covering the housing chamber 223 from the upper end edge of the rear plate 213. The cover plate 214 is formed by connection, the lid piece 215 extending in a direction covering the front plate 211 from the front edge of the lid plate 214, and the side wall pieces 221 provided on both sides of the lid piece 215. And a lid 224. In addition, the wound body container 200 includes a film cutting blade 200K at a position where the film 110a can be easily cut, and may be provided, for example, at the leading edge of the lid piece 215. Further, it is more preferable that the wound body container 200 is devised so that the main body of the wound body 110 does not jump out of the container 210 when the film 110a is pulled out from the accommodated wound body 110. Furthermore, 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 that the container 210 can 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, 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 view 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 plate 218 of the container 210. In the present embodiment, the minimum value of the inner dimension between the axial length S [unit: mm] of the core body 120 around which the wound body 110 is wound and the side plate 218 in the longitudinal direction of the container 210 that houses the wound body 120. W [unit: mm] is the following formula (5A):
W−S ≦ 3 (5A)
It is preferable that the condition represented by When the shaft length S and the minimum value W satisfy these conditions, the gap between the wound body 110 and the side plate 218 inside the container 210 is narrow, so that vibration during distribution and use is suppressed, and the wound body. The amount of damage to the TD end face 110f at 110 is further reduced. In particular, in the conventional wound body, if the value of (WS) is not 1 or less, it is difficult to sufficiently suppress film damage, while the value of (WS) does not exceed 1. Since it is difficult to improve the drawability of the film, it is difficult to suppress damage to the film and to improve the drawability. However, in this embodiment, by making the shape of the TD end surface 110f of the wound body 110 as described above, even if (WS) exceeds 1, the film is sufficiently prevented from being damaged. In particular, if the condition represented by the above formula (5A) is satisfied, damage to the film can be more sufficiently suppressed.

On the other hand, the shaft length S and the minimum value W are expressed by the following formula (5B):
1 <WS (5B)
It is also preferable to satisfy the condition represented by: When the shaft length S and the minimum value W satisfy such conditions, a gap between the wound body 110 and the side plate 218 inside the container 210 can be secured to some extent, so that the lap film 110a contacts the inner wall surface of the container 210. Can be effectively prevented, and as a result, the drawability of the wrap film 110a becomes better. Further, as the core 120 moves to the upper part of the container 210 due to friction with the inner wall surface of the container 210 as the film 110a is pulled out, the core body 120 can be more sufficiently suppressed from jumping out of the container 210. .

That is, in this embodiment, the shaft length S and the minimum value W are expressed by the following formula (5):
1 <W−S ≦ 3 (5)
It is preferable that the condition represented by

  In particular, in the present embodiment, the contradictory relationship between the improvement of the drawability of the film and the prevention of tearing trouble is achieved in a more balanced manner by making the shape of the TD end surface 110f of the wound body 110 as described above. It became possible.

  In the above description, the wrap film wound body including a vinylidene chloride-based resin as a film material has been mainly described. However, the material of the film is not particularly limited as long as it is a material used for a conventional wrap film, for example, Polyolefin resin such as polyethylene, polypropylene (including stretched polypropylene), polymethylpentene; polyvinyl chloride resin; nylon; and combinations thereof.

  When winding the wrap film from the wound body, the wound body and the wound body container of the present embodiment have reduced tearing troubles especially at the start of use, improved usability, and the film cutability In addition, it has excellent 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, using a vibration testing machine (product number “BF-50UC” manufactured by IDEX Co., Ltd.), the wrapping film wound body contained in the container (decoration box) is vibrated. I let you. The vibration test was performed as follows.

  First, 60 roll bodies containing one wound body in one rectangular parallelepiped container (decorative box internal dimension; 42 mm × 42 mm × about 233 mm) are arranged in a cardboard box (internal 28 cm × 46 cm × 24 cm) and fixed to the vibration table with a belt so that the longitudinal direction of the wound body is 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.

  Then, tearing trouble evaluation was performed in the atmosphere of 23 degreeC and relative humidity 50% RH. As an evaluator, 100 people who use wrapping films for food packaging on a daily basis were selected. The evaluator pulled out a film 50 cm from the wound body having a width of about 23 cm accommodated in the container, and then performed a series of operations 10 times each with a tin film cutting blade attached to the decorative box. That is, out of a total of 1000 times with 100 people per 10 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. That is, when the tear trouble occurrence rate was less than 5%, there was almost no tear trouble, and “◎” was evaluated as being extremely excellent in usability. Moreover, when the occurrence rate of tearing troubles was 5% or more and less than 10%, it was evaluated as “◯” as having few tearing troubles and excellent usability. Furthermore, when the tear trouble occurrence rate was 10% or more and less than 15%, it was evaluated as “●” because there was not much tear trouble and it was easy to use. Further, when the tear trouble occurrence rate was 15% or more and less than 20%, the tear trouble was slightly high, and it was evaluated as “Δ” because it was not easy to use. When the tear trouble occurrence rate was 20% or more, the tear trouble was very many, and it was evaluated as “X” because the usability was 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 for cutting the film 10 times with a tin film cutting blade attached to the decorative box 10 times. The film was scored at 5 points per person for ease of cutting (cutting). The cut property was evaluated in the following five steps based on the total score of 100 people. That is, when the total score of 100 people was 450 points or more, it was evaluated as “◎” because the film could be cut very easily. Moreover, when the total score of 100 people was 400 points or more and less than 450 points, it was evaluated as “◯” because the film could be easily cut. Furthermore, when the total score of 100 people was 350 points or more and less than 400 points, it was evaluated as “●” because a slight resistance was felt when the film was cut. In addition, when the total score of 100 people was 300 points or more and less than 350 points, resistance was felt at the time of cutting the film, and it was evaluated as “Δ” because the cut property was poor. When the total score of 100 people was less than 300 points, a large resistance was felt when the film was cut, and it was evaluated as “x” because the cutability was 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 were selected as evaluators. The evaluator pulled out 50 cm of the film from the wound body with a width of 22 cm accommodated in the container and then attached to the cosmetic box. A series of operations for cutting the film with a manufactured film cutting blade was repeated 10 times. Each person scored 5 points for ease of drawing out the film. The drawability was evaluated according to the following five levels based on the total score of 100 people. That is, when the total score of 100 people was 450 points or more, it was evaluated as “◎” because the film could be drawn out very easily and smoothly. Further, when the total score of 100 people was 400 points or more and less than 450 points, it was evaluated as “◯” because the film could be drawn out easily and smoothly. Furthermore, when the total score of 100 people was 350 points or more and less than 400 points, it was evaluated as “●” because the film could be drawn easily. Further, when the total score of 100 people was 300 points or more and less than 350 points, a resistance was felt when the film was pulled out, and it was evaluated as “Δ” because the pulling out property was poor. When the total score of 100 people was less than 300 points, a large resistance was felt when the film was pulled out, and the evaluation was evaluated as “X” because the pulling out property was very bad.

(4. Overall evaluation)
In each of the above evaluations, “総 合” was 5 points, “◯” was 4 points, “●” was 3 points, “Δ” was 2 points, and “×” was 1 point, and overall evaluation was performed. If the total of each evaluation was 12 points or more, it was determined to be acceptable.

[Example 1]
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, when the film is wound around the second paper tube having an outer diameter of 36 mm and a length of 230 mm while being rewound from the first paper tube, the position corresponding to the 10th turn from the winding end The film thickness is 11 μm, X (3) is (Y−2.0) mm, by winding 20 m while obliquely cutting and trimming both ends of the TD toward the winding end. X (5) is (Y-1.6) mm, X (10) is (Y-1.0) mm, Y (that is, X (30)) is 227 mm, and X1 (3) is (Y1-1.0). ) Mm, X1 (5) is (Y1-0.8) mm, X1 (10) is (Y1-0.5) mm, Y1 (that is, X1 (30)) is 120 mm, and X2 (3) is (Y2- 1.0) mm, X2 (5) is (Y2-0.8) mm, X2 (10) is (Y2-0.5) mm, Y (I.e. X2 (30)) was obtained wound body is 107mm. This wound body is accommodated in a paper container (decorative box: inner dimensions 42 mm × 42 mm × 231.5 mm) so that (WS) is 1.5 mm, and the wound body container of Example 1 is obtained. It was. The paper container had the same configuration as that shown in FIG. 4 (the same applies hereinafter). Further, X1 (3), X1 (5), X1 (10) and Y1 are one windings obtained by cutting the vicinity of the center of the wound body so that the wound body is orthogonal to TD and dividing the wound body into two. In the body, it corresponds to Xi (3), Xi (5), Xi (10) and Yi, respectively, and X2 (3), X2 (5), X2 (10) and Y2 were divided into two The other wound body corresponded to Xi (3), Xi (5), Xi (10) and Yi, respectively (the same applies hereinafter). Each evaluation result is shown in Table 1. In the table, the numerical values of X (3), X (5) and X (10) are numerical values indicating how short they are with respect to Y, and are the values of X1 (3), X1 (5) and X1 (10). The numerical value is a numerical value indicating how short it is with respect to Y1, and the numerical values of X2 (3), X2 (5) and X2 (10) are numerical values indicating how short it is with respect to Y2 (hereinafter referred to as “Y2”). The same).

[Example 2]
When winding the film around the second paper tube, wind 20m while trimming the film by gradually cutting the TD ends diagonally from the position corresponding to the 10th turn from the winding end toward the winding end. The film thickness is 11 μm, X (3) is (Y-2.0) mm, X (5) is (Y-1.6) mm, and X (10) is (Y-1.0). mm, X1 (3) is (Y1-1.7) mm, X1 (5) is (Y1-1.2) mm, X1 (10) is (Y1-1.0) mm, and X2 (3) is ( A wound body having Y2-0.3) mm, X2 (5) of (Y2-0.2) mm, and X2 (10) of (Y2-0.0) mm was obtained. This wound body was accommodated in a paper container (decorative box: inner size 42 mm × 42 mm × 231.5 mm) so that (WS) was 1.5 mm. Except these, it carried out similarly to Example 1, and obtained the wound body container of Example 2. FIG. The evaluation results are shown in Table 1.

[Example 3]
Example 3 was carried out in the same manner as Example 1 except that the wound body was housed in a paper container (decorative box: inner dimensions 42 mm × 42 mm × 232.8 mm) so that (WS) was 2.8 mm. The wound body container was obtained. The evaluation results are shown in Table 1.

[Example 4]
Example 4 was carried out in the same manner as Example 2 except that the wound body was housed in a paper container (decorative box: inner dimensions 42 mm × 42 mm × 232.8 mm) so that (WS) was 2.8 mm. The wound body container was obtained. The evaluation results are shown in Table 1.

[Example 5]
Example 5 was carried out in the same manner as in Example 1 except that the wound body was housed in a paper container (decorative box: inner dimensions 42 mm × 42 mm × 230.5 mm) so that (WS) was 0.5 mm. The wound body container was obtained. The evaluation results are shown in Table 1.

[Example 6]
Example 6 was carried out in the same manner as Example 2 except that the wound body was housed in a paper container (decorative box: inner dimensions 42 mm × 42 mm × 230.5 mm) so that (WS) was 0.5 mm. The wound body container was obtained. The evaluation results are shown in Table 1.

[Example 7]
Example 7 was carried out in the same manner as Example 1 except that the wound body was housed in a paper container (decorative box: inner dimensions 42 mm × 42 mm × 233.8 mm) so that (WS) was 3.8 mm. The wound body container was obtained. The evaluation results are shown in Table 1.

[Example 8]
Example 8 was carried out in the same manner as Example 2 except that the wound body was housed in a paper container (decorative box: inner dimensions 42 mm × 42 mm × 233.8 mm) so that (WS) was 3.8 mm. The wound body container was obtained. The evaluation results are shown in Table 1.

[Example 9]
A wound body container of Example 9 was obtained in the same manner as in Example 3 except that the film thickness in the wound body was changed to 8 μm by changing the extrusion speed to 8 kg / hr. The evaluation results are shown in Table 1.

[Example 10]
A wound body container of Example 10 was obtained in the same manner as in Example 4 except that the film thickness in the wound body was changed to 8 μm by changing the extrusion speed to 8 kg / hr. The evaluation results are shown in Table 1.

[Example 11]
A wound body container of Example 11 was obtained in the same manner as in Example 5 except that the film thickness in the wound body was changed to 8 μm by changing the extrusion speed to 8 kg / hr. The evaluation results are shown in Table 1.

[Example 12]
A wound body container of Example 12 was obtained in the same manner as in Example 6 except that the film thickness in the wound body was changed to 8 μm by changing the extrusion speed to 8 kg / hr. The evaluation results are shown in Table 1.

[Example 13]
A wound body container of Example 13 was obtained in the same manner as in Example 7 except that the film thickness in the wound body was changed to 8 μm by changing the extrusion speed to 8 kg / hr. The evaluation results are shown in Table 1.

[Example 14]
A wound body container of Example 14 was obtained in the same manner as in Example 8 except that the film thickness in the wound body was changed to 8 μm by changing the extrusion speed to 8 kg / hr. The evaluation results are shown in Table 1.

[Example 15]
A wound body container of Example 15 was obtained in the same manner as in Example 3 except that the film thickness in the wound body was changed to 15 μm by changing the extrusion speed to 14 kg / hr. The evaluation results are shown in Table 1.

[Example 16]
A wound body container of Example 16 was obtained in the same manner as in Example 4 except that the film thickness in the wound body was changed to 15 μm by changing the extrusion speed to 14 kg / hr. The evaluation results are shown in Table 1.

[Example 17]
A wound body container of Example 17 was obtained in the same manner as Example 5 except that the film thickness in the wound body was changed to 15 μm by changing the extrusion speed to 14 kg / hr. The evaluation results are shown in Table 1.

[Example 18]
A wound body container of Example 18 was obtained in the same manner as in Example 6 except that the film thickness in the wound body was changed to 15 μm by changing the extrusion speed to 14 kg / hr. The evaluation results are shown in Table 1.

[Example 19]
A wound body container of Example 19 was obtained in the same manner as in Example 7 except that the film thickness in the wound body was changed to 15 μm by changing the extrusion speed to 14 kg / hr. The evaluation results are shown in Table 1.

[Example 20]
A wound body container of Example 20 was obtained in the same manner as in Example 8 except that the film thickness in the wound body was changed to 15 μm by changing the extrusion speed to 14 kg / hr. The evaluation results are shown in Table 1.

[Example 21]
X (3) is (Y-2.8) mm, X (5) is (Y-1.8) mm, X (10) is (Y-1.2) mm, and X1 (3) is (Y1- 1.4) mm, X1 (5) is (Y1-0.9) mm, X1 (10) is (Y1-0.6) mm, X2 (3) is (Y2-1.4) mm, X2 ( 5) Similar to Example 3, except for trimming so that 5) is (Y2-0.9) mm and X2 (10) is (Y2-0.6) mm. Got. The evaluation results are shown in Table 1.

[Example 22]
X (3) is (Y-2.8) mm, X (5) is (Y-1.8) mm, X (10) is (Y-1.2) mm, and X1 (3) is (Y1- 2.1) mm, X1 (5) is (Y1-1.4) mm, X1 (10) is (Y1-1.0) mm, X2 (3) is (Y2-0.7) mm, X2 ( 5) A wound body container of Example 22 in the same manner as in Example 3, except that trimming was performed so that (Y2-0.4) mm and X2 (10) were (Y2-0.2) mm. Got. The evaluation results are shown in Table 1.

[Example 23]
X (3) is (Y-2.8) mm, X (5) is (Y-1.8) mm, X (10) is (Y-1.2) mm, and X1 (3) is (Y1- 2.5) mm, X1 (5) is (Y1-1.6) mm, X1 (10) is (Y1-1.2) mm, X2 (3) is (Y2-0.3) mm, X2 ( 5) A wound body container of Example 23 in the same manner as in Example 3 except that trimming was performed so that (Y2-0.2) mm and X2 (10) were (Y2-0.0) mm. Got. The evaluation results are shown in Table 1.

[Example 24]
X (3) is (Y-1.1) mm, X (5) is (Y-0.6) mm, X (10) is (Y-0.1) mm, and X1 (3) is (Y1- 0.6) mm, X1 (5) is (Y1-0.3) mm, X1 (10) is (Y1-0.1) mm, X2 (3) is (Y2-0.5) mm, X2 ( 5) A wound body container according to Example 24, except that trimming was performed so that 5) was (Y2-0.3) mm and X2 (10) was (Y2-0.0) mm. Got. The evaluation results are shown in Table 1.

[Example 25]
A commercial paper wrap 45M (trade name, polymethylpentene (hereinafter also referred to as “PMP”)) manufactured by Riken Technos Co., Ltd. is used as a second paper tube having an outer diameter of 36 mm and a length of 230 mm. When rewinding the film, the film thickness is 9 μm by winding 20 m while gradually cutting the TD ends of the film from the position corresponding to the 10th turn from the winding end toward the winding end while obliquely cutting and trimming. X (3) is (Y-2.0) mm, X (5) is (Y-1.6) mm, X (10) is (Y-1.0) mm, and X1 (3) is (Y1-1.0) mm, X1 (5) is (Y1-0.8) mm, X1 (10) is (Y1-0.5) mm, and X2 (3) is (Y2-1.0) mm. , X2 (5) is (Y2-0.8) mm, and X2 (10) is (Y2-0.5) mm. It was. This wound body is accommodated in a paper container (decorative box: inner dimensions 42 mm × 42 mm × 232.8 mm) so that (WS) is 2.8 mm, and the wound body container of Example 25 is obtained. It was.

[Comparative Example 1]
When the film was wound around the second paper tube, a wound body container of Comparative Example 1 was obtained in the same manner as in Example 1 except that the film was not trimmed. The evaluation results are shown in Table 1.

[Comparative Example 2]
The wound body of Comparative Example 2 was the same as Comparative Example 1 except that it was housed in a paper container (decorative box: inner dimensions 42 mm × 42 mm × 232.8 mm) so that (WS) was 2.8 mm. A containment was obtained. The evaluation results are shown in Table 1.

[Comparative Example 3]
Comparative Example 3 was performed in the same manner as Comparative Example 1 except that the wound body was housed in a paper container (decorative box: inner dimensions 42 mm × 42 mm × 230.5 mm) so that (WS) was 0.5 mm. The wound body container was obtained. The evaluation results are shown in Table 1.

[Comparative Example 4]
Comparative Example 4 was performed in the same manner as Comparative Example 1 except that the wound body was housed in a paper container (decorative box: inner dimensions 42 mm × 42 mm × 233.8 mm) so that (WS) was 3.8 mm. The wound body container was obtained. The evaluation results are shown in Table 1.

[Comparative Example 5]
A wound body container of Comparative Example 5 was obtained in the same manner as Comparative Example 2 except that the film thickness in the wound body was changed to 8 μm by changing the extrusion speed to 8 kg / hr.

[Comparative Example 6]
A wound body container of Comparative Example 6 was obtained in the same manner as Comparative Example 3 except that the film thickness in the wound body was changed to 8 μm by changing the extrusion speed to 8 kg / hr. The evaluation results are shown in Table 1.

[Comparative Example 7]
A wound body container of Comparative Example 7 was obtained in the same manner as Comparative Example 4 except that the film thickness in the wound body was changed to 8 μm by changing the extrusion speed to 8 kg / hr. The evaluation results are shown in Table 1.

[Comparative Example 8]
A wound body container of Comparative Example 8 was obtained in the same manner as in Comparative Example 2 except that the film thickness in the wound body was changed to 15 μm by changing the extrusion speed to 14 kg / hr. The evaluation results are shown in Table 1.

[Comparative Example 9]
A wound body container of Comparative Example 9 was obtained in the same manner as Comparative Example 3 except that the film thickness in the wound body was changed to 15 μm by changing the extrusion speed to 14 kg / hr. The evaluation results are shown in Table 1.

[Comparative Example 10]
A wound body container of Comparative Example 10 was obtained in the same manner as in Comparative Example 4 except that the film thickness in the wound body was changed to 15 μm by changing the extrusion speed to 14 kg / hr. The evaluation results are shown in Table 1.

[Comparative Example 11]
X (3) is (Y-0.0) mm, X (5) is (Y-0.0) mm, X (10) is (Y-0.0) mm, and X1 (3) is (Y1- 0.0) mm, X1 (5) is (Y1-0.0) mm, X1 (10) is (Y1-0.0) mm, X2 (3) is (Y2-0.0) mm, X2 ( 5) A wound body container of Comparative Example 11 in the same manner as in Example 25 except that trimming was performed so that (Y2-0.0) mm and X2 (10) were (Y2-0.0) mm. Got. The evaluation results are shown in Table 1.

[Reference Example 1]
A wound body container of Reference Example 1 was obtained in the same manner as in Comparative Example 2 except that the film thickness in the wound body was changed to 5 μm by changing the extrusion speed to 6 kg / hr. The evaluation results are shown in Table 1.

[Reference Example 2]
A wound body container of Reference Example 2 was obtained in the same manner as in Comparative Example 2 except that the film thickness in the wound body was changed to 20 μm by changing the extrusion speed to 18 kg / hr. The evaluation results are shown in Table 1.

  The wound body and the wound body container of the present invention, when pulling out the film from the wound body, have reduced tearing troubles particularly at the start of use, and improved usability, and further, the cutability and the drawing of the film. Since it has excellent properties, 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, 9 ... 2nd pinch roll, 10 ... Bubble, DESCRIPTION OF SYMBOLS 11 ... 3rd pinch roll, 12 ... Double ply film, 13 ... Winding roll, 110 ... Winding body, 120 ... Cylindrical core body, 200 ... Winding body container, 210 ... Container.

Claims (4)

A wrap film wound body including a wrap film having a film thickness of 6 to 18 μm and a tear strength in the film width direction of 2.0 to 6.0 cN, 30 turns from the winding end when not used When the width length X (30) [unit: mm] of the wrap film of the eye is set to Y, the width length X (3) [unit: mm] of the wrap film on the third turn from the winding end is Following formula (1):
Y-3.0 ≦ X (3) ≦ Y-1.0 (1)
The width length X (5) [unit: mm] of the wrap film in the fifth turn from the winding end is expressed by the following formula (2):
Y−2.0 ≦ X (5) ≦ Y−0.5 (2)
The width length X (10) [unit: mm] of the wrap film on the 10th turn from the winding end is expressed by the following formula (3):
Y−1.5 ≦ X (10) <Y (3)
And the widths X (3), X (5) and X (10) are represented by the following formula (4):
X (3) <X (5) <X (10) (4)
A wound body that satisfies the conditions represented by In each wound body obtained by cutting the wound body so as to be orthogonal to the film width direction in the wrap film and dividing the wound body into two, the width length Xi of the wrap film on the 30th turn from the winding end ( 30) When [unit: mm] is Yi, the width length Xi (3) [unit: mm] of the wrap film on the third round from the winding end is expressed by the following formula (1A):
Yi−2.5 ≦ Xi (3) ≦ Yi−0.5 (1A)
The width length Xi (5) [unit: mm] of the wrap film on the fifth turn from the winding end is expressed by the following formula (2A):
Yi-1.75 ≦ Xi (5) ≦ Yi−0.25 (2A)
The width length Xi (10) [unit: mm] of the wrap film on the 10th turn from the winding end is expressed by the following formula (3A):
Yi-1.5 <Xi (10) <Yi (3A)
And the widths Xi (3), Xi (5) and Xi (10) are represented by the following formula (4A):
Xi (3) <Xi (5) <Xi (10) (4A)
The wound body according to claim 1, satisfying a condition represented by:   The wound body according to claim 1 or 2, wherein the wrap film includes a vinylidene chloride-based resin. The wrap film winding body according to any one of claims 1 to 3, a cylindrical core body around which the wrap film winding body is wound, and the wrap film winding body and the cylindrical core body. A minimum length W of the inner dimension between the axial length S [unit: mm] of the cylindrical core and the side plate in the longitudinal direction of the container. Unit: mm] is the following formula (5):
1 <W−S ≦ 3 (5)
A wound body container that satisfies the condition represented by

Images