JP2529719Y2 - Wound film storage box - Google Patents

Description

[Detailed description of the invention]

[0001]

[Industrial application] The present invention relates to a rolled film storage box,
In particular, the present invention relates to a storage box equipped with a cutting blade capable of recycling and incineration of an empty storage box after use.

[0002]

2. Description of the Related Art Conventionally, plastic films such as polyvinyl chloride resin, aluminum foil, and films such as glassine paper have been wound in a box of a few meters to a few hundred meters in a cardboard cylindrical winding tube. Sold. This storage box is provided with a saw-shaped cutting blade at the ridge of the opening in the longitudinal direction, so that the stored rolled film is drawn out and cut into a predetermined length as needed.

[0003] The material of the saw-shaped cutting blade has a thickness of 0.15.
A tin plate of mm to 0.3 mm is used. The tin blade made of tin has excellent cutting properties of the film,
The durability against cutting more than 00 times is high, and even if the above-mentioned wound film has a length of 100 m or more, the cutting property does not decrease. However, although a tin blade made of tin has these features, it is required that when empty containers are discarded after the film has been used, they are torn off from the containers and sorted. However, since the tin plate cutting blade is driven into a storage box and is caulked, it is very difficult to peel off the blade.

A storage box that solves these problems is disclosed in
No. 1-267153 and Japanese Utility Model Laid-Open No. 2-45926. However, the paper box of the ticket-turning film disclosed in Japanese Patent Application Laid-Open No. 1-267153 is cut into a reinforced sawtooth shape by attaching two or more cardboards of the paper box, and impregnated with a resin solution or resin latex from the cut surface. Since the cutting blade is formed in such a manner, when the thickness of the portion to be used as the cutting blade is insufficient, the durability of the cutting blade in cutting a long rolled film is insufficient, and paper When the thickness is made sufficiently large, the durability is improved, but there is a problem that the volume of the case body increases and the cost increases. Also Kaikai
JP-A-2-45926 discloses a roll-shaped film storage box having a saw-toothed edge made of a fibrous sheet, but this saw-tooth-shaped cutting blade is formed of cardboard, and There is a possibility that a problem may occur in cutting the long rolled film in terms of durability.

[0005]

The problem to be solved by the present invention is to solve the above-mentioned problems of the conventional cutting tool, and to recycle an empty storage box after using stored film or to use a cutting blade. It is an object of the present invention to provide a storage box which can be incinerated with a garbage attached. Another problem is the storage of a rolled film equipped with a cutting blade made of an organic fibrous material, which has durability against cutting of a long rolled film and can prevent injuries to fingers by the cutting blade. Is to provide boxes.

[0006]

The present inventor has conducted various studies to solve the above-mentioned problems, and as a result, an organic fibrous material having a specific range of flexural rigidity and hardness has been used as a film cutting blade. It was found to be extremely useful in terms of its cutting ability, durability, recyclability and disposal.

That is, according to the present invention, in a rolled film storage box in which a rolled film is stored and a saw-shaped cutting blade is attached, the saw-shaped cutting blade has a thickness of 0.15 mm or more.
5 mm or less, flexural rigidity is 6 × 10 ⁴ kgf / c in the longitudinal direction
m ² or more and 9 × 10 ⁴ kgf / cm ² or less, lateral direction 3 × 1
0 ⁴ kgf / cm ² or more 5 × ¹⁰ 4 kgf / cm ² or less, made of a Shore hardness of D60 degrees 80 degrees or less organic fibrous material, the longitudinal direction is the cutting edge direction of the saw-like cutting edge of the organic fibrous material The present invention provides a rolled film storage box which is attached to the case by an adhesive means so that

[0008] The rolled film stored in the storage box of the present invention includes polyvinyl chloride film, polyvinylidene chloride film, plastic film such as polyethylene film, aluminum foil, glassine paper, wax paper and the like. A vinyl chloride film is suitable. The cutting blade attached to the storage box of the present invention, as an organic fibrous material, has a thickness of 0.15 mm or more and 0.5 mm or less, preferably,
Thicknesses between 0.25 mm and 0.35 mm are used. In addition, the density is 0.8 g / cm ³ or more and 1.2 g / cm ³ or less, preferably 1.1 g / cm ³ or more and 1.2 g / cm ³ or less in consideration of practicality. Here, when the thickness of the cutting blade is less than 0.15 mm, the blade is easily cracked when cutting the film, and when it exceeds 0.5 mm, the blade cannot be formed.

As such an organic fibrous material, for example, a raw paper made from purified cotton pulp or wood pulp is immersed in a concentrated solution of zinc chloride, and the swelling and swelling action of the solution on the raw paper is performed. A so-called vulcanized fiber, which is formed by laminating and integrating, aging, washing, removing and drying the solution, is suitably employed from the viewpoint of cost and strength. Vulcanized fiber of the formed plate in the above manner, the moisture resistance of polyethylene resins in order to improve, urethane resins, alkyd resins, polyvinyl chloride resins, polyester resins, such as impregnated or polypropylene pins Ren resin, one side Alternatively, both surfaces can be surface-coated.

The cutting blade used in the present invention is obtained by processing the edge of the organic fibrous material having the above-mentioned bending rigidity and hardness into a saw-like shape. Is mounted by an adhesive means so as to be located at a position. When a film is cut using this cutting blade, a cutting load is applied to one end in the longitudinal direction of the cutting blade, and a force acts on the cutting blade to bend outward in the direction in which the film is pulled. In addition, this cutting blade has a width of 2
It has a length of 0 to 40 times. Therefore, the saw blade
Flexural rigidity less than 6 × 10 ⁴ Kgf / cm ^{2 in} longitudinal direction
Becomes closer to the transverse flexural rigidity,
When cutting, the cutting edge of the cutting blade is easily curved outward,
Deterioration decreases. If it exceeds 9 × 10 ⁴ Kgf / cm ²
In addition to being easy to hurt your fingers, the rigidity of the
The ratio increases and the cutting blade extends laterally when moisture is absorbed.
And, in particular, the cut
The adhesive strength of the cutting edge is likely to decrease and peel off from the adhesive.
Load is applied to the cutting edge when cutting the film
And the cutting blade easily peels from the storage box or partially peels
And the tip of the cutting blade is irregularly curved without
Sisters. After drying, the cutting blade shrinks and wrinkles
The film remains curved, and the film cannot be stably cut. Song
And the transverse rigidity is less than 3 × 10 ⁴ Kgf / cm ^{2 in the} lateral direction.
When it absorbs moisture, the cutting blade extends in the horizontal direction and peels
It tends to shrink after drying and wrinkles easily occur. 5x
When it exceeds 10 ⁴ Kgf / cm ² , it approaches the rigidity in the longitudinal direction.
When the film is cut, it tends to bend.

Therefore, the bending rigidity of the organic fibrous material is from 6 × 10 ⁴ Kgf / cm ^{2 to} 9 × 10 ⁴ Kgf / cm ² , preferably from 6.5 × 10 ⁴ Kgf / cm ^{2 to} 8.0 × 10 ⁴ Kgf / cm ^{2. 4} Kgf / cm ² or less,
Lateral direction 3 × 10 ⁴ Kgf / cm ² or more and 5 × 10 ⁴ Kgf / cm ² or less, preferably 3.5 × 10 ⁴ Kgf / cm ² or more and 4.5 × 10 ⁴ Kgf / cm ² or less
(That is, the bending rigidity in the vertical direction is higher than that in the horizontal direction.
By doing so , the above disadvantages do not occur, and the cutting properties of the film and the durability as a cutting blade can be obtained.

Further, when the blade is mounted as a cutting blade, a blade having a Shore hardness D of not less than 60 degrees and not more than 80 degrees, and preferably 70 degrees, in order to make it more durable, may damage fingers even when the blade edge is hard and the blade edge is sharp. Nothing. Shore hardness D
If the angle is less than 60 degrees, the film is too soft to cut the film satisfactorily, and if it exceeds 80 degrees, it is too hard and the fingers are easily damaged.

On the other hand, adhesives used for bonding the cutting blade made of the organic fibrous material to the storage box include thermoplastic polyurethane, SBS, SEBS, polyethylene, polyester, vinyl acetate, EVA, EEA, and the like. For base resins such as polyamide and polyacrylate,
Rosin, rosin derivative, hydrogenated rosin, terpene resin, polyterpene resin, modified terpene resin, aliphatic hydrocarbon resin, coumarone-indene resin, alkylphenol resin, etc. are preferably used as the tackifying resin. In consideration of the conditions, a material that can withstand water resistance and a cutting load is appropriately selected and used. As the base resin, polybutyl acrylate or vinyl acetate is particularly preferred. These adhesives are coated on one side of a sheet of the rolled roll of the vulcanized fiber using a belt coater, a roll coater, or the like,
It is applied to the cutting blade mounting part of the storage box base paper.

As a method of processing the saw-shaped cutting blade, 1) punching using a slit-type die having the same saw-shaped cross-sectional shape as a conventional tin blade, 2) rotary punching 3) CO ₂ , YAG, etc. Although laser processing is mentioned, the punching method of 1) or 2) is most suitable from the viewpoints of production capacity, cost, and the fact that the conventional apparatus can be used as it is or partially modified. Also, organic fiber
The fiber material is generally in the form of a sheet and a roll,
The longitudinal direction of the sheet is the vertical direction, and the width direction is the horizontal direction.
I have. If the thickness of the organic fibrous material exceeds 0.5 mm and the flexural rigidity and the hardness are out of the above-mentioned ranges, the cutting edge cannot be cut off at the time of punching, and the punching die may be damaged. is there.

Hereinafter, an example of the rolled film storage box of the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 is a perspective view of a wound film storage box of the present invention, and FIG. 2 is a partially enlarged plan view of a cutting blade attached to the storage box. As shown in the drawing, an organic fibrous material 3 having a saw-shaped cutting blade 2 is attached to a film take-out opening of a wound film storage box 1 according to the present invention, and a film 4 pulled out of the storage box 1 Is cut by being pressed against the cutting blade 2 along the opening 5 of the storage box 1 . This organic fibrous material 3
The saw-shaped cutting blades are formed in parallel with a horizontal direction in which the saw-shaped cutting blades are continuously provided, as shown by an arrow, in a direction perpendicular (vertical direction).

[0016]

Since the rolled film storage box according to the present invention is made of a nonmetallic organic fibrous material, there is no danger, and the film can be recycled or incinerated after use.

[0017]

Example 1 Example 1 Thickness: 0.25 mm, Flexural rigidity: 7.58 × 10 ⁴ Kgf / cm ² in longitudinal direction, 4.15 × 10 ⁴ Kgf / cm ² in transverse direction, Shore hardness D73 degree, width 305 m
m, 1,000 m long roll-shaped vulcanized fiber, coated on the whole surface on one side with an adhesive composed mainly of polybutyl acrylate and an appropriate amount of terpene resin as an adhesive using a roll coater, and a 20 μm adhesive A layer was formed.

This is punched on a 350 g / m ² basis weight storage box base paper (blank) which has been subjected to external processing and crease processing.
Pressing is performed simultaneously with the punching process with the conventional fixing device to form a saw-shaped cutting blade with a 2.0 mm blade edge pitch and a 60 ° blade angle.The current punching die has sufficient workability and chipping of the blade edge occurs. Did not. When the number of times the polyvinyl chloride film was cut by the cutting blade was measured for the storage box obtained in this manner, it was possible to cut 3000 times or more, which was sufficient for storing and using a long wound polyvinyl chloride wound film. It was confirmed that it had excellent durability. Furthermore, store at a temperature of 40 ° C. and a humidity of 80%, and leave
After the cutting blade has been removed from the storage box,
The presence / absence of curvature, occurrence of wrinkles, and cutability were evaluated.
However, the results shown in Table 1 were obtained.

Example 2 An example using a vulcanized fiber having a thickness of 0.35 mm, a flexural rigidity of 8.23 × 10 ⁴ Kgf / cm ^{2 in} a longitudinal direction, 4.61 × 10 ⁴ Kgf / cm ^{2 in} a lateral direction, and a D Shore hardness of 74 degrees. When processing was performed under the same conditions as in Example 1 to form a saw-shaped cutting blade, the current punching die had sufficient workability, and chipping of the cutting edge did not occur. Further, the storage box formed in the same manner as in Example 1 was subjected to a cutting durability test. As a result, it was possible to cut 3000 times or more, which was sufficient for use as a storage box for a long roll of polyvinyl chloride wound film. It was confirmed that it had durability. Furthermore, store at a temperature of 40 ° C and a humidity of 80%
Then, after leaving, the same evaluation as in Example 1 was performed.
The results as shown in Table 1 were obtained.

[0020]

[Table 1] Comparative Examples 1-4 Thickness 0.3 mm, Shore hardness D72 degrees, bending shown in Table 1
Using Vulcanized Fiber with rigidity,
Processing is performed under the same conditions as in Example 1 to form a saw-shaped cutting blade.
Then, this cutting blade is attached to a storage box, and the same as in the first embodiment.
As a result of the evaluation, the results shown in Table 1 were obtained. Comparative Example 5 For comparison, the thickness was 0.10 mm and the flexural rigidity was 3.36 × in the longitudinal direction.
10 ⁴ kgf / cm ^2, transverse ^{1.85 × 10 4 kgf / cm 2} , a Shore hardness D
When processing was performed under the same conditions as in Example 1 using a vulcanized fiber of 72 degrees to form a saw-shaped cutting blade, the current punching die was not able to perform the processing well and chipping of the cutting edge occurred. Furthermore, this cutting blade is glued to the storage box,
A cutting durability test similar to that of Example 1 was performed. As a result, cutting was impossible at 95 times, and it was confirmed that there was a problem in durability. The flexural rigidity of the present invention conforms to JIS K-7106.

[0021]

[Effect of the invention] As is clear from the above embodiment, the saw blade of the film storage box is set to a thickness of 0.15 mm or more and 0.5 mm or less,
Flexural rigidity of 6 × 10 ⁴ Kgf / cm ² or more in the longitudinal direction 9 × 10 ⁴ Kgf / cm ²
Hereinafter, it is made of an organic fibrous material having a lateral direction of 3 × 10 ⁴ Kgf / cm ² or more and 5 × 10 ⁴ Kgf / cm ² , and a Shore hardness D of 60 ° or more and 80 ° or less. By attaching to the case by the bonding means so that it is in the direction of the cutting edge of the cutting blade, it has performance comparable to the cutting performance and durability of the conventional tin saw blade, and the entire storage box including the saw blade is recycled. Alternatively, incineration is possible, and safety is improved, and the industrial effect is great.

[Brief description of the drawings]

FIG. 1 is a perspective view of a storage box for a rolled film of the present invention.

FIG. 2 is a partially enlarged plan view of a cutting blade attached to a storage box.

[Explanation of symbols]

1 storage box for rolled film 2 cutting blade 3 organic fibrous material 4 film 5 opening

 ──────────────────────────────────────────────────続 き Continuation of front page (56) References JP-A-3-9802 (JP, A) JP-A-1-294429 (JP, A) JP-A-5-178344 (JP, A) JP-A-5-178344 178343 (JP, A) JP-A-5-111969 (JP, A) Japanese Utility Model Laid-Open No. 1-128524 (JP, U)

Claims (1)

(57) [Scope of request for utility model registration] 1. A wound film storage box in which a wound film is housed and a saw-shaped cutting blade is attached, wherein the saw-shaped cutting blade has a thickness of 0.15 mm or more and 0.5 mm or less, and a bending rigidity ratio of vertical. Direction 6 × 10 ⁴ kgf / cm ² or more 9 × 10 ⁴ k
gf / cm ² or less, lateral direction 3 × 10 ⁴ kgf / cm ² or more and 5 × 10 ⁴ kgf / cm ² or less, Shore hardness D60
A winding made of an organic fibrous material of not less than 80 degrees and not more than 80 degrees, wherein the organic fibrous material is attached to the case by an adhesive means so that a longitudinal direction of the organic fibrous material is a cutting edge direction of the saw-shaped cutting blade. Time film storage box.