JP5753773B2 - Wrap film storage box - Google Patents

Description

The present invention relates to a box that accommodates a wrapping film that is generally used for packaging foods in general households, food sales, food and beverage provision services, and the like. More particularly, the present invention relates to a storage box without a cutting tool such as a saw blade.

Conventionally, a wrap film has been provided as a wound film stored in a rectangular box as shown in FIG. 7, for example, and a necessary amount is drawn from this, and cut in a certain direction laterally in some way, Provided for use. As a method of cutting horizontally, the most common method is to use a long metal saw blade provided on a box lid piece or the like of a box.

However, metal saw blades have safety problems such as injury to the hands, and paper boxes and metal saw blades must be separated at the time of disposal. To solve these problems In place of the saw blade, a sheet to which a deformed metal powder is bonded is used as a cutting tool (Patent Document 1), or the wound film has a continuous processing flaw in its length direction and is in contact with the processing flaw area. It has been proposed to provide a cutting aid such as a metal piece or vulcanized paper piece at the local portion of the box (Patent Document 2). However, the above-mentioned safety problems and separation problems still remain.

In addition, a method has been proposed in which a film can be cut along a cut even in a box without a cutting tool such as a saw blade by forming cuts at regular intervals in the lateral end of the wound film (Patent Document 3). However, in a box in which the saw blades are simply removed from the conventional box, the film is not sufficiently cut. In addition, since a part of the box serves as a cutting tool, there is a problem that the part of the box is damaged before the wound film is used up and the film cannot be cut.

Japanese Patent Laid-Open No. 61-217345 Japanese Patent Laid-Open No. 11-124133 JP 2001-322636 A

The object of the present invention is to develop a practically satisfactory cut property even if there is no cutting tool such as a saw blade in the box containing the wound film, and to maintain the effect until the stored film is used up. It is to provide a wrap film storage box that can be used.

As a result of diligent research, the present inventors have found that in the conventional wrap film storage box, the front end portion of the lid piece (1) has notches at both ends in the longitudinal direction, and the notches are formed on the front plate (5 When the upper end of the front plate (5) is cut out so as to engage with the upper edge of), the end of the wrap film pulled out from the storage box in the width direction is sandwiched by the above engagement, so that a cutting tool such as a saw blade is attached to the box. It has been found that the film can be cut well even without it, and the above object can be achieved.

That is, this invention is a box which accommodates the wound wrap film, Comprising: It forms with each wall surface of a front plate (5), a bottom plate (4), a rear plate (6), and a side plate (3). A rectangular parallelepiped storage chamber having an opening at the top, a cover plate (2) that can be opened and closed connected in a direction covering the opening of the storage chamber from the upper edge of the rear plate (6), and a cover plate (2) In the wrap film storage box having the lid cover piece (1) extending in the direction covering the front plate (5) from the front edge of the front edge, the leading edge of the lid cover piece (1) is notched at both longitudinal ends thereof. Has a notch, and forms a flap between one notch or notch and the other notch or notch, and the entire upper edge of the front plate (5) or both ends or one of the upper edges So that everything except the end of the box is lower than the height H of the rectangular parallelepiped. The above-mentioned rectangular parallelepiped produced by the cutting when the upper end of the front plate (5) is cut off and the lid plate (2) is closed so that the flap of the lid piece (1) enters the storage chamber The storage box is characterized in that a corner at the end of the upper edge of the front plate (5) at a position lower than the height of the front plate and the cutout or the cutout mesh with each other.

The storage box of the present invention can cut the film satisfactorily even if it does not have any cutting tool such as saw blades, so safety problems such as injury to the hand, paper box and metal The problem that the saw blades must be separated at the time of disposal can be avoided.

It is a perspective view which shows an example of the storage box of this invention. In the storage box of FIG. 1, it is a perspective view of the state which closed the lid | cover surface board (2) so that the flap formed in the front-end | tip part of a lid cover piece (1) may enter in a storage chamber. It is a front view which shows the example of the shape of a lid lid piece (1). It is a front view which shows the example of the shape of a lid lid piece (1). It is a front view which shows the example of the shape of a lid lid piece (1). It is a front view which shows the example of the shape of a lid lid piece (1). It is a front view which shows the example of the shape of a front plate (5). It is a front view which shows the example of the shape of a front plate (5). It is an expanded view of the storage box of FIG. It is the figure which photographed the surface of the film in which the knurling process was given. It is a perspective view which shows the conventional storage box.

The wrap film storage box of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view showing an example of a storage box of the present invention. The storage box of the present invention is a rectangular parallelepiped storage chamber having an opening at the top, formed by the wall surfaces of the front plate (5), the bottom plate (4), the rear plate (6) and the side plate (3). An openable / closable lid face plate (2) connected in a direction covering the opening of the storage chamber from the upper edge of the rear face plate (6), and a direction covering the front face plate (5) from the front edge of the lid face plate (2). An extended lid piece (1), and the leading end of the lid piece (1) has a notch or notch at both longitudinal ends thereof, and one notch or notch and the other notch. Alternatively, a flap is formed between the notch and the notch, and when the lid face plate (2) is closed so that the flap of the lid piece (1) enters the storage chamber, the notch or notch is formed on the front plate ( The upper end portion of the front plate (5) is cut off so as to engage with the corner C of the upper end edge of 5).

FIG. 2 is a perspective view of the storage box of FIG. 1 with the lid face plate (2) closed so that the flap formed at the tip of the lid cover piece (1) enters the storage chamber. As shown in FIG. 2, the storage box of the present invention has a notch (or notch) in the lid piece (1) when the lid face plate (2) is closed in this way. It is configured to engage with the corner C. Therefore, when the wrap film stored in the storage box is pulled out and the lid face plate (2) is closed as shown in FIG. 2, the end portion in the width direction of the wrap film can be sandwiched between the engaging portions. As a result, the force concentrates on the end portion of the wrap film to cause the cutting, and even if there is no cutting tool such as a saw blade in the box, the lid piece (1) is connected to the upper end edge of the front plate (5). The film can be well cut along the contact portion or the upper edge of the front plate (5). Since the storage box of the present invention has the above-mentioned meshing portions at both ends in the longitudinal direction, the wrap film can be cut from either the left or right end in the width direction.

Below, the lid piece (1) which has a notch or a notch | incision, and the front plate (5) by which the upper end edge is cut off are demonstrated, referring drawings. In the following, the case where the leading edge of the flap formed at the leading end of the lid piece (1) is parallel to the front edge of the lid face plate (2) will be described. Thus, it is not limited to the case of being parallel.

FIG. 3 is a view showing an example of notches and cuts that can be formed in the lid lid piece (1). The notch is formed, for example, as shown in FIGS. 3A to 3F, and the notch is formed, for example, as shown in FIG. Wb in FIG. 3 is a point where the distance between the front edge of the lid face plate (2) and the front edge of the notched portion of the lid cover piece (1) is the smallest, and B is the lid piece. This is the shortest distance from the front edge in the longitudinal direction of (1). FIG. 3B shows the case where Wb = 0. Wb is preferably 30 mm or less, more preferably 20 mm or less, and further preferably 5 to 15 mm. When Wb is larger than 30 mm, good film cutability may not be obtained. In FIG. 3, Wa is defined as the point A between the front edge of the lid cover piece (1) and the front edge of the lid cover piece (1) in the longitudinal direction, where A is the boundary point between the cutout portion and the non-cutout portion. The shortest distance. As shown in FIG. 3 (a), when there are two boundary points (A and A '), the point farther from the longitudinal edge of the lid piece (1) is defined as point A. In addition, as shown in FIG. 3G, when the lid piece (1) has a cut, the position of the cut on the leading edge of the lid piece (1) is a point A. The size of Wa can be appropriately determined in consideration of the ease of meshing with the angle C described below, and may be larger, smaller or the same as the size of Wb. Furthermore, as shown in FIGS. 3 (e) and (f), at least a part of the portion formed by the cutout of the tip edge of the lid lid piece (1) may be a curved line.

FIG. 4 is a diagram showing an example of cutting off the upper edge of the front plate (5). The upper end edge of the front plate (5) is cut out (not shown) so that the entire upper edge is lower than the height H of the rectangular parallelepiped constituting the storage chamber, or both ends or one end of the upper edge. All except the portion is cut out to be lower than the height H of the rectangular parallelepiped constituting the storage chamber, and the flap formed at the tip of the lid lid piece (1) enters the storage chamber. When the lid face plate (2) is closed, the corner C at the end of the upper end edge of the lowered front face plate (5) engages with the cutout portion or notch of the lid piece (1). In the case of a notch, either point A, point B, or any point between them, especially point B, produced by the notch meshes with corner C, Good film cutability can be obtained. In the case of incision, the point B in the incision meshes with the corner C, so that good film cutability can be obtained. The shortest distance Wc between the boundary line and the corner C between the front plate (5) and the side plate (3) can be appropriately adjusted so as to obtain the above mesh. Preferably, Wb = Wc.

The angle α of the angle C formed by the upper edge of the front plate (5) generated by the above-described cutting is not particularly limited as long as it can form a notch or notch in the lid piece (1). Considering the ease of production of the box and the ease of meshing, it is usually preferably 30 ° or more, and usually 150 ° or less is preferred from the viewpoint of securely holding the film in meshing.

In the front plate (5), the upper end edge on the side plate (3) side with respect to the corner C has any shape as long as the corner C that can be engaged with the notch or notch in the lid piece (1) is formed. For example, the shape shown in FIGS. 4C and 4D may be used. Moreover, in FIG. 4, although the upper end edge of the said cut-out part is parallel to the lower end edge of a front plate (5), as long as the said angle | corner C is formed, it does not need to be parallel.

Further, the shortest distance between the engagement point with the notch or notch corner C in the lid piece (1) and the front edge of the lid plate (2) is Hx, and the lower edge and corner C of the front plate (5) are Hc + Hc ≧ H is necessary for the corner C and the notch or notch in the lid piece (1) to mesh with each other. When the meshing point is point B, Hb + Hc ≧ H. Here, Hb is the shortest distance between the front end edge of the lid face plate (2) and the point B. The upper limit of Hx + Hc is not particularly limited, but the lid of the storage box when the lid face plate (2) is closed and the cutout or notch and the corner C are engaged so that the tip of the lid piece (1) enters the storage chamber. The shape close to a rectangular parallelepiped is preferable in terms of durability of the storage box. The upper limit depends on the size of the side plate of the storage box. The larger the side plate, the greater the difference from H. For example, in the case of a storage box having a side plate size of 44 mm × 44 mm, the upper limit is preferably H + 10 mm.

The shapes of the longitudinal ends of the lid piece (1) and the front plate (5) may or may not be symmetrical to each other. Further, the lid cover piece (1) and the front plate (5) are not limited to the shapes illustrated in FIGS. 3 and 4 as long as the above-described engagement is obtained.

The storage box of the present invention can be made using paper usually used for storing wrap films, such as coated cardboard having a basis weight of 400 to 500 g / m ² . If the basis weight of the paper is small, a problem in durability tends to occur, and if it is large, the cost is high. Accordingly, the basis weight of the paper is appropriately selected in consideration of the durability required from the length of the film roll to be stored.

Furthermore, the storage box of the present invention has a paper reinforcing plate on the lid cover piece (1), the front plate (5) and the cover plate (2) from the viewpoint of durability, and preferably on the back surface thereof from the viewpoint of aesthetics. It is preferable to bond them to reinforce them. The reinforcement of the lid piece (1) and the front plate (5) directly improves their durability. The reinforcement of the cover plate (2) increases the torsional rigidity of the entire box, and thus improves the durability of the entire box. As the paper reinforcing plate, the same paper as that constituting the storage box can be used. The reinforcing plate can be prepared separately from the storage box and attached to the back surface. Alternatively, for example, a reinforcing plate is integrally attached to the tip edge of the lid piece (1) and the upper edge of the front plate (5) (see FIG. 5), and is folded and pasted to the back side at the tip edge and the upper edge. Reinforcement can also be performed. In this case, after reinforcement by the above folding, a notch or notch is made in the lid cover piece (1) or the upper end portion of the front plate (5) is cut off to obtain the intended storage box. 5 is a developed view of the storage box of FIG.

The storage box of the present invention is for a wrap film. The wrap film to be stored may be anything as long as it has mechanical strength useful as a wrap film. For example, a single wrap film made of a resin selected from polyvinylidene chloride, polyvinyl chloride, polyethylene, polymethylpentene-1, polyamide and the like. A layer or multilayer film having a total thickness of 3 to 30 μm, typically about 8 to 15 μm. As said mechanical strength, it is preferable that the tensile breaking force of the length direction of a wrap film and a horizontal direction is 1-15N, More preferably, it is 1-10N. In this specification, the tensile breaking force is a value measured using a test speed of 500 mm / min and a test piece type 2 in accordance with JISK-7127.

In addition, the storage box of the present invention is particularly useful for storing a wrap film having excellent cross-cutting properties. An example of such a film is a film obtained by the method described in Japanese Patent Application No. 2010-275113. This film comprises (A) 100 parts by weight of polymethylpentene-1 resin, and (B) 0.5 to 60 parts by weight of polybutene-1 resin, preferably 1 to 25 parts by weight and / or liquid paraffin 0.1. To 20 parts by weight, preferably 1 to 12 parts by weight, provided that the total amount of component (B) does not exceed 75 parts by weight, preferably 0.6 to 75 parts by weight, more preferably 2 to 35 parts by weight, even more preferably. A polymethylpentene-1-based resin composition containing 3 to 25 parts by mass can be produced by extruding to a film thickness of 3 to 30 μm using a T die. At this time, the extrusion is performed by using the lip opening R (unit: μm) of the T die, the film thickness t (unit: μm), and the discharge speed E (unit: cm ³ / hr) per 1 cm of the die width of the resin composition extruded from the die. ) And air gap A (unit: cm) are represented by the following formula:
15 ≦ (1 / t−1 / R) · (E / At ) × 100 ≦ 900... It is preferable that the conditions are satisfied. Preferably, t is 5 to 20 μm, more preferably 8 to 15 μm, A is 0.5 to 2 cm, E is 100 cm ³ / hr or more, and R is about 300 to 900 μm.

The above formula is performed under conditions where the film deformation speed until the molten film exiting the die reaches the chill roll and becomes the final size film is high in extrusion film formation using a T die. This means that the melted film is drawn down large and fast in the air gap from the die to the chill roll.

The polymethylpentene-1 resin (A) includes 4-methylpentene-1 and / or 3-methylpentene-1 in addition to a homopolymer of 4-methylpentene-1 or 3-methylpentene-1. Copolymers with other α-olefins are included. The α-olefin may be used alone or in combination of two or more. Examples of the α-olefin include ethylene, propylene, 1-butene, 1-hexene, 1-octene, 1-decene, 1-dodecene and the like.

The polybutene-1 resin as the component (B) includes a copolymer of butene-1 and another α-olefin in addition to the homopolymer of butene-1. The α-olefin may be used alone or in combination of two or more. Examples of the α-olefin include ethylene, propylene, 1-hexene, 1-octene, 1-decene, 1-dodecene and the like. The above fluid paraffin is a liquid, chemically stable substance mainly composed of a chain saturated hydrocarbon, and commercially available examples (trade names) include Daphne Oil CP of Idemitsu Kosan Co., Ltd. and MORESCO Co., Ltd. Examples include Sco White and Kaneda Corporation's High Call K.

The polymethylpentene-1 resin composition further includes a liquid processing aid such as a thermoplastic resin other than the polymethylpentene-1 resin (eg, polypropylene and polyethylene), liquid polybutene (hydrogenated polyisobutylene), Additives such as an antioxidant, a neutralizing agent, an antifogging agent, and a slipping agent can be blended. The total amount of the thermoplastic resin and the liquid processing aid is preferably 20 parts by mass or less, more preferably 10 parts by mass or less, with respect to 100 parts by mass of the polymethylpentene-1 resin.

Further, if the wrap film stored in the storage box of the present invention can be cut with a smaller force, the load applied to the storage box can be reduced, and as a result, better cutability can be obtained until the stored film is used up. Can be maintained. In order to enable cutting with less force, the film can be provided with some trigger for cutting. Specifically, knurling or laser processing can be performed on at least one of the lateral ends of the film with a width of, for example, 0.1 to 10 mm.

Knurling is performed by sandwiching the film between a metal engraving roll and a metal or high hardness rubber engraving roll or a smooth roll, or by pressing the engraving roll against a roll of film. It is a process to scratch. The processing conditions should be appropriately selected depending on the material of the film, but the pressing is usually about 10 to 50 N / m. FIG. 6 shows a photograph of the film surface that has been knurled. The knurling process can be performed by forming an independent process at the time of raw film formation, at the time of slit process, or after the slit process. The knurling is applied to at least one of the lateral ends of the film, but is preferably applied to both ends so that the film can be cut from either side. The processing width is usually 0.1 to 10 mm, preferably 0.3 to 6 mm.

Laser processing is processing in which a film is melted in a very fine region by laser irradiation heat and a concave shape or a hole is provided there. The laser to be used is not particularly limited. For example, gas lasers such as carbon dioxide laser, helium neon laser, argon ion laser and excimer laser, ruby laser using chromium-added ruby crystal as medium, titanium sapphire laser using titanium-added sapphire crystal as medium, and YAG crystal Solid state lasers such as various YAG lasers obtained by substituting yttrium with other rare earth elements and Nd: YAG lasers using neodymium-added YAG. Moreover, well-known lasers, such as a liquid laser, a semiconductor laser, a free electron laser, a metal vapor laser, a chemical laser, can be used. The irradiation output is about 0.5 to 20 W, and is appropriately adjusted in consideration of the thickness of the film and the processing speed. Laser processing can be performed by forming an independent process during raw film formation, during slit processing, or after slit processing. Laser processing is applied to at least one of the lateral ends of the film, but it is more preferable to apply the processing to both ends so that the film can be cut from either side. The processing width is usually 0.1 to 10 mm, preferably 0.3 to 6 mm.

In addition, when knurling or laser processing is performed, it is possible to obtain a trouble preventing effect that the drawn end of the wound film is in close contact with the winding body and cannot be pulled out.

EXAMPLES Hereinafter, although this invention is demonstrated concretely based on an Example, this invention is not limited to a following example.

Examples 1-6
Using coated cardboard coated on one side (basis weight of cardboard 450 g / m ² ), the lid piece (1) has the shape of FIG. 3 (a), and the front plate (5) is of FIG. 4 (a). A storage box having a shape (ha) of 24 mm, Hb, Wa, Wb, Hc, and Wc as shown in Table 1 and having a shape (height) 44 mm × width 44 mm × length 310 mm as shown in Table 1. Produced. This storage box was made so that the point B of the lid piece (1) meshed with the corner C of the front plate (5).

Comparative Example 1
Using coated cardboard coated on one side (basis weight of cardboard 450 g / m ² ), a storage box having a shape (H) 44 mm × width 44 mm × length 310 mm shown in FIG. 7 was produced. The length in the direction perpendicular to the longitudinal direction of the lid piece (1) is 24 mm.

Test Wrapped wrap film (300 mm wide, 50 m long film was wound on a paper tube having a width of 305 mm, an inner diameter of 27 mm, and a wall thickness of 1.5 mm on the decorative box obtained as described above. The following test was conducted. The results are shown in Table 1. In addition, as a stored wrap film, 4-methylpentene-1 (Mitsui Chemical Co., Ltd. MX-0020 (trade name), MFR (260 ° C., 5.00 kg) 21 g / 10 min) 100 parts by mass, polybutene- 1 (3 parts by mass of PB8640M (trade name) manufactured by LYONDELBASEL, MFR (190 ° C., 21.18N) 28 g / 10 min) and 5 parts by mass of liquid paraffin (Hicoal K-350 (trade name) manufactured by Kaneda Corporation) A resin composition comprising: a film having a thickness of 12 μm formed by using a T-die film forming apparatus manufactured by Nippon Steel Co., Ltd. and subjected to rotlet processing at both lateral ends. The film was formed under the conditions of a lip opening of 400 μm, an air gap of 1.5 cm, a discharge speed of 712 cm ³ / hr, a chill roll temperature of 25 ° C. and a die outlet resin temperature of 290 ° C., and a vacuum chamber and an ear jet were used. Knurling was performed under the processing conditions of a presser amount of 0.2 mm, a processing width of 0.6 mm, and a processing speed of 400 m / min. The tensile breaking force in the longitudinal direction and the transverse direction of this film was 5.4 N and 2.9 N, respectively.

(1) Cutability test About 40 cm of the wrap film stored is pulled out of the storage box, and the lid cover piece (1) is closed so that the flap of the lid cover piece (1) enters the storage chamber. ) And the front plate (5), the test of cutting the film was tried 10 times, and the number of times the film was cut was expressed as a cutting rate (%). In Comparative Example 1, cutting was attempted using the leading edge of the lid lid piece (1).

(2) Durability test After the same cutting as in (1) was attempted 100 times, another 10 cuttings were attempted, and the number of times that cutting was possible in these 10 trials was expressed as a cutting rate (%).

1: Cover piece 2: Cover plate 3: Side plate 4: Bottom plate 5: Front plate 6: Rear plate

Claims (3)

A box for storing the wrapped wrap film, which is formed by the wall surfaces of the front plate (5), the bottom plate (4), the rear plate (6) and the side plate (3). A rectangular parallelepiped storage chamber, an openable / closable cover plate (2) connected in a direction covering the opening of the storage chamber from the upper edge of the rear plate (6), and a front plate from the front edge of the cover plate (2) (5) In the wrap film storage box having the lid cover piece (1) extending in the direction covering, the leading end portion of the lid cover piece (1) has a notch or notch at both longitudinal ends thereof, A flap is formed between one notch or notch and the other notch or notch, and all of the upper end edge of the front plate (5) or both ends or one end of the upper end edge is excluded. Is located at a position lower than the height H of the rectangular parallelepiped. Has been cut off, and when the lid face plate (2) is closed so that the flap of the lid piece (1) enters the storage chamber, it is in a position lower than the height of the rectangular parallelepiped generated by the cutting. A storage box characterized in that a corner at an end of an upper end edge of the front plate (5) and the notch or the notch engage with each other. The product which accommodated the wound wrap film in the storage box of Claim 1. The product according to claim 2, wherein at least one of the lateral ends of the wrap film is subjected to knurling and / or laser processing having a width of 0.1 to 10 mm.