Wrapping film products

Abstract

To provide a wrap film product, the proper cuttability of which is maintained until the wrap film product is used up, even when a wound body of a wrap film housed in a storage box has a great wound length.SOLUTION: In a wrap film product, a wound body of a wrap film is housed within a storage box that is formed in an approximately rectangular parallelepiped shape. The storage box has a cutter. A body of the storage box is formed from a material having a torsion angle of 20-180°. The wrap film has a cutting strength of 0.5-10 N when the wrap film is cut by the cutter.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a wrap film product in which a roll of wrap film, which is widely used mainly for packaging food in ordinary households, grocery stores, food and beverage service establishments, etc., is stored in a storage box. [Background technology]

[0002] Conventionally, wrap film has been provided as a roll housed in a roughly rectangular storage box. The required amount of wrap film is extracted from the roll housed in the storage box and cut using a cutter provided in the storage box. However, because the storage box is subjected to a strong twisting stress during the cutting process, repeated use of the wrap film product, particularly when the wrap film roll is long, can cause the storage box to sag and distort, resulting in a decrease in cuttability. Proposed technologies for preventing the sag and distortion of the storage box include attaching a reinforcing member made of vulcanized fiber or resin-impregnated vulcanized fiber to the back of the tip of the cover piece (Patent Document 1), forming concave and convex embossments on the outer surface of the cover plate (Patent Document 2), and providing a reinforcing layer in an area including a portion of the box's fold line (Patent Document 3). However, there remains a demand for wrap film products that maintain good cuttability until the product is completely used. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2014-141263 [Patent Document 2] Japanese Patent Application Laid-Open No. 2015-137103 [Patent Document 3] Japanese Patent Application Laid-Open No. 2017-007679 Summary of the Invention [Problem to be solved by the invention]

[0004] To provide a wrap film product that maintains good cuttability until the wrap film product is used up, even if the wrap film roll stored in a storage box has a long roll length. [Means for solving the problem]

[0005] As a result of extensive research, the inventors have discovered that the above object can be achieved by storing a roll of wrap film in a specific storage box, preferably by storing a roll of a specific wrap film in a specific storage box.

[0006] That is, the various aspects of the present invention are as follows. [1]. A wrap film product in which a roll of wrap film is stored inside a roughly rectangular parallelepiped storage box, the storage box has a cutter, the body of the storage box is formed from a material with a twist angle of 20 to 180°, and the wrap film has a cutting strength of 0.5 to 10 N when cut by the cutter. [2]. The wrap film product according to item [1], wherein the compressive strength of the storage box is 50N or more. [3]. The wrap film product according to item [1] or [2], wherein the wrap film has a cutting displacement of 5 to 80 mm when cut with the cutter. [4]. The wrap film product according to any one of items [1] to [3], wherein the wrap film is made of a polyvinyl chloride resin composition. [5]. The wrap film product according to any one of items [1] to [3], wherein the wrap film is made of a polymethylpentene-1 based resin composition. [Effects of the Invention]

[0007] The wrap film product of the present invention maintains good cuttability until the wrap film product is used up, even if the wrap film roll stored in the storage box has a long roll length (typically 50 m or more, 80 m or more, or 100 m or more). DETAILED DESCRIPTION OF THE INVENTION

[0008] In this specification, the term "resin" is used to include a resin mixture containing two or more resins, and a resin composition containing components other than resin.

[0009] In this specification, the term "equivalent to or greater than" in relation to a numerical range means a certain numerical value or more than a certain numerical value. For example, "20% or greater" means 20% or more than 20%. The term "equivalent to or less than" in relation to a numerical range means a certain numerical value or less than a certain numerical value. For example, "20% or less" means 20% or less than 20%. The symbol "to" in relation to a numerical range means a certain numerical value, more than a certain numerical value and less than another certain numerical value, or another certain numerical value. Here, the other certain numerical value is a number greater than the certain numerical value. For example, "10 to 90%" means 10%, more than 10% and less than 90%, or 90%. Furthermore, the upper and lower limits of a numerical range can be arbitrarily combined, and embodiments incorporating such combinations can be interpreted. For example, from a description of the numerical range of a certain characteristic such as "usually 10% or more, preferably 20% or more. On the other hand, it is usually 40% or less, preferably 30% or less," or "usually 10 to 40%, preferably 20 to 30%," it can be unambiguously read that the certain characteristic is 10 to 40%, 20 to 30%, 10 to 30%, or 20 to 40% in one embodiment.

[0010] Other than in the examples, or where otherwise specified, all numerical values ​​used in the specification and claims should be understood to be modified by the term "about." Without attempting to limit the application of the doctrine of equivalents to the claims, each numerical value should be construed in light of the number of significant digits and by applying ordinary rounding techniques.

[0011] The wrap film product of the present invention comprises a roll of wrap film stored inside a substantially rectangular parallelepiped storage box. The storage box has a cutter. The body of the storage box is formed from a material with a twist angle of typically 180° or less, preferably 150° or less, more preferably 120° or less, and even more preferably 90° or less. The body of the storage box may have a twist angle of typically 20° or more, preferably 30° or more. The wrap film has a cutting strength of typically 10 N or less, preferably 6 N or less, and more preferably 3 N or less when cut with the cutter. The wrap film may have a cutting strength of typically 0.5 N or more, preferably 1 N or more when cut with the cutter. The storage box, the cutter, and the wrap film are described below.

[0012] 1. Storage box The storage box constituting the wrap film product of the present invention is a roughly rectangular box that stores a roll of the wrap film inside. The body of the storage box is formed from a material with a twist angle of typically 180° or less, preferably 150° or less, more preferably 120° or less, and even more preferably 90° or less. The twist angle of the storage box body may typically be 20° or more, preferably 30° or more. Here, the twist angle refers to the twist angle of the material used to form the storage box body, and is measured according to Test (A) Twist Angle and Torsional Rigidity in the Examples below.

[0013] The main body of the storage box is formed using a material with a twist angle of typically 180° or less, preferably 150° or less, more preferably 120° or less, and even more preferably 90° or less. Therefore, even if a large amount of the wrap film product of the present invention is subjected to stress when the required amount of wrap film is pulled out from the roll and cut with the cutter provided in the storage box, settling and distortion of the storage box are suppressed, and good cutting properties can be maintained until the wrap film product is used up.

[0014] From the viewpoint of maintaining good cutting properties until the wrap film product is used up, a smaller twist angle is preferable. On the other hand, a twist angle that is smaller than necessary will increase costs. From the examples of this application, it is considered that a twist angle of 20° or more is usually sufficient, and preferably 30° or more is sufficient.

[0015] The material used to form the body of the storage box may have a torsional rigidity modulus of typically 100 MPa or more, preferably 300 MPa or more, from the viewpoint of maintaining good cuttability until the wrap film product is used up. A higher torsional rigidity modulus is preferable from the viewpoint of maintaining good cuttability until the wrap film product is used up. On the other hand, a torsional rigidity modulus that is higher than necessary increases costs. From the examples of the present application, it is considered that a torsional rigidity modulus of typically 2000 MPa or less is sufficient, and preferably 1500 MPa or less is sufficient.

[0016] The torsional rigidity here refers to the torsional rigidity of the material used to form the body of the storage box, and is measured in accordance with Test (A) Twist Angle and Torsional Rigidity in the Examples below.

[0017] The material used to form the body of the storage box is appropriately selected from the viewpoint of keeping the torsion angle within the above-mentioned range. The material used to form the body of the storage box is preferably appropriately selected from the viewpoint of keeping the torsion angle and torsional rigidity within the above-mentioned range.

[0018] Examples of the material include paper materials such as coated cardboard and G-flute corrugated cardboard; resin materials such as polypropylene, polyethylene, and polystyrene; vulcanized fiber or materials impregnated with rigid resins such as urethane resin, phenol resin, melamine resin, epoxy resin, polystyrene resin, urea resin, and polyphenylene sulfide resin; etc. Of these, paper materials are preferred.

[0019] When the material is paper, the basis weight is usually 400 g / m2, from the viewpoint of keeping the upper limit of the twist angle within the above range and maintaining good cutting properties until the wrap film product is used up. 2 More than 500g / m 2 More preferably, 600 g / m 2 The basis weight may be greater than 800 g / m. When the material is a paper material, a larger basis weight is preferable from the viewpoint of maintaining good cuttability until the wrap film product is used up. On the other hand, a basis weight that is greater than necessary will increase costs. From the examples of this application, a basis weight of 800 g / m is usually used. 2 A weight of 700 g / m or less is sufficient, and preferably 700 g / m 2 The following is considered sufficient.

[0020] Here, the basis weight of the paper material is 1 m 2 In this specification, the basis weight of coated cardboard is a value measured for the entire coated cardboard, i.e., a value measured including the coating.

[0021] When the material is paper, the upper limit of the twist angle is set within the above range, and from the viewpoint of maintaining good cutting properties until the wrap film product is used up, the pulp constituting the paper material is preferably chemical pulp. In addition, coniferous pulp is preferred because of its long fiber length and wide fiber width.

[0022] The compression resistance strength of the storage box may be typically 50 N or more, preferably 70 N or more, more preferably 90 N or more, and even more preferably 120 N or more, from the viewpoint of maintaining good cuttability until the wrap film product is used up. From the viewpoint of maintaining good cuttability until the wrap film product is used up, the greater the compression resistance strength of the storage box, the more preferable it is. On the other hand, a compression resistance strength that is greater than necessary increases costs. From the examples of the present application, it is considered that a compression resistance strength of 400 N or less is typically sufficient, and preferably 300 N or less is sufficient.

[0023] The storage box is provided with the cutter. The location of the cutter on the storage box is not particularly limited as long as it is a location where the required amount of wrap film can be easily pulled out from the roll and cut with the cutter provided on the storage box.

[0024] An example of a typical embodiment of the storage box will be described with reference to Figure 1. Figure 1 is a perspective conceptual diagram showing an example of the typical embodiment of the storage box. The storage box has a roughly rectangular parallelepiped storage chamber with an open top, formed by a front panel 1, a bottom panel 2, a back panel 3, a right panel 4, and a left panel 4'; an openable cover panel 5 connected from the upper edge of the back panel 3 in a direction covering the opening of the storage chamber; a cover piece 6 extending from the front edge of the cover panel 5 in a direction covering the front panel 1, a right cover panel flap 7, and a left cover panel flap 7', which openably cover the opening of the storage chamber; a right panel flap 8 connected from the right panel 4 in a direction covering the opening of the storage chamber; and a left panel flap 8' connected from the left panel 4' in a direction covering the opening of the storage chamber. A cutting tool 9 is provided at the leading edge of the cover piece 6, usually on the back side of the leading edge, so that the cutting edge of the cutting tool 9 extends from the cover piece.

[0025] Another example of the typical embodiment of the storage box will be described with reference to Fig. 2. Fig. 2 is a perspective conceptual diagram showing another example of the typical embodiment of the storage box. The storage box includes a roughly rectangular parallelepiped storage chamber formed by a front panel 1, a bottom panel 2, a back panel 3, a right panel 4, and a left panel 4', and open at the top; an openable cover panel 5 connected to the upper edge of the back panel 3 in a direction covering the opening of the storage chamber; a cover piece 6 extending from the front edge of the cover panel 5 in a direction covering the front panel 1; a right panel flap 8 connected to the right panel 4 in a direction covering the opening of the storage chamber; and a left panel flap 8' connected to the left panel 4' in a direction covering the opening of the storage chamber. A cutting tool 9 is provided on the edge of the bottom panel 2 facing the front panel 1, with the cutting edge of the cutting tool 9 extending beyond the bottom panel 2.

[0026] The size of the storage box is selected appropriately depending on the size of the wrap film roll to be stored.

[0027] 2.Cutting tool The storage box constituting the wrap film product of the present invention has a cutter that allows the wrap film to be cut with less force, thereby preventing the storage box from becoming worn or distorted, and ultimately allowing the wrap film product to maintain good cutting ability until it is used up.

[0028] The shape of the cutter is not particularly limited as long as it can cut the wrap film well. One typical embodiment of the cutter is a saw-blade shaped one. Figure 3 is a conceptual diagram showing an example of an embodiment of the cutter in a saw-blade shape. Another embodiment of the cutter is, for example, a blade-shaped one with a single notch at one longitudinal end. In addition, from the viewpoint of productivity when producing cutters, double-edged cutters (those with blades at both longitudinal ends) are commonly used industrially, but single-edged cutters (those with a blade at only one longitudinal end) may also be used.

[0029] The material used to make the cutter is not particularly limited as long as it can be used to make a cutter that can cut the wrap film well. Examples of materials used to make the cutter include metal materials such as stainless steel, tinplate, and aluminum; resin materials such as polyester, polyethylene, polypropylene, polystyrene, polyacetal, polylactic acid, polyphenylene sulfide, PEEK (polyether ether ketone), PES (polyethersulfone), and PPS (polyphenylene sulfide); and paper materials such as vulcanized paper, resin-impregnated hardened paper, and abrasive grain-bonded paper. Among these, metal materials are preferred, and stainless steel and tinplate are more preferred, from the viewpoint of being able to cut the wrap film with less force.

[0030] 3. Wrapping film In the wrap film product of the present invention, the cutting strength of the wrap film stored in the storage box may typically be 10 N or less, preferably 6 N or less, and more preferably 3 N or less. On the other hand, the cutting strength of the wrap film may typically be 0.5 N or more, and preferably 1 N or more. Here, the cutting strength is the cutting strength when the wrap film is cut with the cutter provided in the storage box, and is measured according to Test (C) Cutting Strength and Cutting Displacement in the Examples below.

[0031] The wrap film product of the present invention has a cutting strength of typically 10 N or less, preferably 6 N or less, and more preferably 3 N or less, so that when the required amount of wrap film is pulled out from the roll and cut with the cutter provided in the storage box, it can be easily cut even with little stress applied to the storage box. This prevents the storage box from becoming worn or distorted, and ultimately allows the wrap film product to maintain good cutting properties until it is used up.

[0032] On the other hand, the cutting strength of the wrap film may be generally 0.5 N or more, preferably 1 N or more, from the viewpoint of the mechanical strength required for a wrap film for packaging food.

[0033] The cutting displacement of the wrap film is usually 80 mm or less, preferably 60 mm or less, and more preferably 50 mm or less, from the viewpoint of ensuring that when the required amount of wrap film is pulled out from the roll and cut with the cutter provided in the storage box, even with little stress on the storage box, and thus maintaining good cutting properties until the wrap film product is used up. On the other hand, from the viewpoint of the mechanical strength required of wrap film for packaging food, the cutting displacement of the wrap film is usually 5 mm or more, preferably 10 mm or more. Here, the cutting displacement is the cutting displacement when the wrap film is cut with the cutter provided in the storage box, and is measured according to Test (C) Cutting Strength and Cutting Displacement in the Examples below.

[0034] The thickness of the wrap film is not particularly limited. From the viewpoint of keeping the cutting strength within the upper limit range, the thickness of the wrap film may usually be 30 μm or less, preferably 20 μm or less, more preferably 15 μm or less, and even more preferably 12 μm or less. On the other hand, from the viewpoint of the handleability (particularly pickability) of the wrap film product and the mechanical strength required for a wrap film for food packaging, the thickness of the wrap film may usually be 3 μm or more, preferably 5 μm or more, and more preferably 7 μm or more.

[0035] The material constituting the wrap film is not particularly limited as long as it is a material that can be preferably used for food packaging. Examples of materials constituting the wrap film include thermoplastic resins such as polyvinyl chloride, polyvinylidene chloride, polyethylene, polypropylene, polybutene-1, polymethylpentene-1, and nylon; resin mixtures containing one or more of these; and resin compositions containing one or more of these.

[0036] Examples of the wrap film include a single-layer film made of the above-mentioned materials, a multilayer film having two or more layers made of the above-mentioned materials, etc. Here, the multilayer film may have two or more layers made of only the same material.

[0037] From the viewpoint of keeping the cutting strength within the above-mentioned upper limit range, the wrap film is preferably made of a polyvinyl chloride resin composition or a polymethylpentene-1 resin composition, more preferably a polyvinyl chloride resin composition or a polymethylpentene-1 resin composition, and has a thickness within the above-mentioned range. Such preferred wrap films can be easily cut even with little stress applied to the storage box when the required amount of wrap film is pulled out from the roll and cut with the cutter provided in the storage box. This prevents the storage box from becoming worn or distorted, and ultimately allows the wrap film product to maintain good cutting properties until it is used up.

[0038] A preferred example of a wrap film made of the polyvinyl chloride resin composition is the wrap film described in WO 2015 / 033468.

[0039] A preferred example of a wrap film made from the polymethylpentene-1 resin composition is a wrap film produced by the method described in JP-A-2012-121268.

[0040] The wrap film may be knurled on one or both of the longitudinally parallel edges of the wrap film, so as to achieve a cutting strength within the upper limit range. Knurling is a process in which the film is sandwiched between an engraved roll made of metal or the like and an engraved or smooth roll made of metal or high-hardness rubber, or by pressing the engraved roll against a rolled film, thereby creating fine embossments or scratches. The processing conditions are appropriately selected depending on the material and thickness of the wrap film. A preferred method for knurling the wrap film is described in, for example, JP 2013-022905 A. [Example]

[0041] The present invention will be described below with reference to examples, but the present invention is not limited to these examples.

[0042] Measurement method (a) Torsion angle, torsional rigidity: The twist angle (unit: °) and torsional rigidity (unit: MPa) of the material used in the storage box were measured with reference to 9.8 of JIS K6773:1999. Specifically, using the Crushberg flexibility temperature measuring device shown in Figure 3 of the JIS standard, a sample was punched out of the back panel of the storage box so that the length of the sample coincided with the width of the back panel, in the shape shown in Figure 2 of the JIS standard (excluding thickness; the thickness was the same as that of the material used in the storage box). The twist angle was read according to the procedure in 9.8.3 of the JIS standard, except that the procedure was carried out in the atmosphere at a constant temperature of 23°C and a constant relative humidity of 50%. The torsional rigidity was calculated using the formula in the JIS standard.

[0043] (b) Compression resistance: The compressive strength (unit: N) of the storage box was measured with reference to JIS K7181:2011. That is, a compression platen 1 (φ120 mm) was set on the load cell below a compression tester, and a storage box (emptied by opening the storage box and removing the rolled wrap film that had been stored therein) was placed on top of the compression platen 1 so that the center of the surface of the compression platen 1 was in contact with the center of the bottom plate of the storage box. A compression platen 2 (φ120 mm) was set on the load cell above the compression tester, and the box was sandwiched between the compression platen 2. The compression platen 2 was then lowered at a rate of 20 mm / min, and the compressive force at the initial upper yield point was measured as the compressive strength.

[0044] (C) Cutting strength, cutting displacement: The cutting strength (unit: N) and displacement (unit: mm) when cutting the wrap film with a cutter were measured with reference to JIS K7181:2011. Specifically, jigs 10 and 10' (200 mm wide, 250 mm high, 20 mm thick) were set equidistantly from the center of the sample stage on the load cell below the compression tester, with a distance of 200 mm between jigs 10 and 10' and parallel to each other. Next, a cutter 11 (a cutter was taken from a storage box, and only the cutter was used for measurement) was set on the load cell above the compression tester. Next, a wrap film 12 cut to a size of 300 mm in the machine direction and 100 mm in the horizontal direction was stretched using adhesive tape to bridge between jigs 10 and 10', with the bridging direction coinciding with the machine direction of the wrap film 12. Figure 4 shows a photograph during the test. Figure 5 shows a conceptual diagram of the relative positions of jigs 10 and 10' set on the sample stage of the lower load cell, cutting tool 11 set on the upper load cell, and wrap film 12 stretched across jigs 10 and 10'. The upper load cell, the jig for setting cutting tool 11 on the upper load cell, the lower load cell, and the sample stage for the lower load cell are not shown. These positions were such that, when the upper load cell was lowered, the center of one long edge of wrap film 12 was in contact with the center of the edge of cutting tool 11 on which the cutting blade was provided; the angle 15 between the direction of extension 13 of the cutting tool 11 and the lateral direction 14 of the wrap film 12 was 45°; and the normal vector 16 to the side of cutting tool 11 was parallel to the machine direction 17 of the wrap film 12. Next, the upper load cell was lowered at a speed of 500 mm / min, and the maximum compressive force was measured as the cutting strength. The amount of movement of the load cell from the point where the compressive force was first sensed to the point where the maximum value of the compressive force was observed was measured as the amount of shear displacement.

[0045] (d) Long-term cutting property: A wrap film roll with a length of 100 m was placed in a storage box, and about 30 cm was pulled out and cut using a cutter provided in the storage box. This process was repeated 300 times and evaluated according to the following criteria. A: The wrap film was cut 300 times without any problems. B: The wrap film was cut 300 times. The first 200 times were done without any problems. However, from the 201st time onwards, there were cut mistakes. C: The wrap film was cut 300 times. The first 100 times were done without any problems. However, from the 101st time onwards, there were cut mistakes. D: The wrap film could not be repeatedly cut 300 times.

[0046] Raw materials used (A) Storage box (A-1)Basic weight 650g / m 2 A storage box was made using coated cardboard of the same material, and was roughly rectangular with an outer diameter of 314 mm in the horizontal (longitudinal) direction, 49 mm in height, and 49 mm in depth (front-to-back direction), and had the structure shown in Figure 1. The cutting tool (B-1) described below was fixed to the back side of the leading edge of the cover piece so that the cutting edge of the cutting tool (B-1) described below extended from the cover piece. (A-2)Basic weight 615g / m 2 It was made in the same way as the storage box (A-1) above, except that coated cardboard was used. (A-3)Basic weight 450g / m 2 A storage box was made using G-flute cardboard, and was roughly rectangular with an outer diameter of 314 mm in the horizontal (longitudinal) direction, 49 mm in height, and 49 mm in depth (front-to-back), and had the structure shown in Figure 2. The cutting tool (B-1) described below was attached to the edge of the bottom panel on the front panel side so that the cutting edge of the cutting tool (B-1) described below extended beyond the bottom panel. (A-4) Basis weight 450g / m 2 It was made in the same way as the storage box (A-1) above, except that coated cardboard was used. (A-5)Basic weight 450g / m 2 The container was made in the same manner as the storage box (A-1) except that coated cardboard was used and the cutting tool (B-2) described below was used as the cutting tool. (A-6)Basic weight 390g / m 2It was made in the same way as the storage box (A-1) above, except that coated cardboard was used.

[0047] (B) Cutting tool (B-1) Tinplate saw-shaped cutting tool (B-2) Polylactic acid saw blade cutting tool

[0048] (C) Wrap film roll (C-1) Roll of wrap film made of polyvinyl chloride resin composition: A blend consisting of 100 parts by weight of polyvinyl chloride homopolymer with a degree of polymerization of 800 (Kaneka Corporation), 35 parts by weight of an adipic acid-based plasticizer "DINA (trade name)" (Taoka Chemical Co., Ltd.), 10 parts by weight of epoxidized soybean oil "ADEKA Cizer O-130P (trade name)" (ADEKA Corporation), 0.8 parts by weight of a calcium zinc-based heat stabilizer "CZ-440 (trade name)" (Katsuta Chemical Co., Ltd.), and 2.0 parts by weight of an anti-fog agent "RVM-06 (trade name)" (Riken Vitamin Co., Ltd.) was used. An 8 μm thick film was produced using a film-forming device equipped with a single-screw extruder and a T-die, and a take-up device, under the condition of the maximum shear rate applied during film production of 200 (1 / s). The resulting film was then slit to a width of 300 mm, and a wrap film roll with a length of 100 m was produced.

[0049] (C-2) Wrap film roll made of polymethylpentene-1 resin composition: A blend consisting of 100 parts by mass of Mitsui Chemicals' poly4-methylpentene-1 "MX-0020 (trade name)", 3 parts by mass of Lyondell Basell's polybutene-1 "PB8640M (trade name)", and 5 parts by mass of Kaneda Co., Ltd.'s liquid paraffin "Hicol K-350 (trade name)" was used, and a film-making device equipped with a single-screw extruder and a T-die, and a take-up device equipped with a vacuum chamber and an edge jet, was used. The die outlet resin temperature was 290°C, the lip opening was 400 μm, the air gap was 1.5 cm, and the extrusion speed was 89 cm. 3A film having a thickness of 10 μm was produced under conditions of 1 / hr and a chill roll temperature of 25° C. The film obtained was then slit to a width of 300 mm to produce a wrap film roll having a length of 100 m.

[0050] (C-3) Wrap film roll made of polyethylene resin composition: A commercially available wrap film made of a polyethylene resin composition was used, which was 300 mm wide, 100 m long, and 9 μm thick.

[0051] (C-4) Wrap film roll 2 made of polyethylene resin composition: A wrap film roll of a commercially available polyethylene resin composition other than the wrap film roll (C-3) was used, with a width of 300 mm and a roll length of 100 m. The thickness was 6 μm.

[0052] (C-5) Wrap film roll made of polyvinylidene chloride resin composition: A commercially available wrap film made of a polyvinylidene chloride resin composition was used, which was 300 mm wide, 100 m long, and 10 μm thick.

[0053] Examples 1-10 A wrap film product was produced by storing the wrap film roll described in Table 1 in a storage box described in Table 1. The above tests (a) to (d) were carried out. The results are shown in Table 1.

[0054] [Table 1]

[0055] It was confirmed that the wrap film product of the present invention maintains good cuttability until the wrap film product is used up. [Brief explanation of the drawings]

[0056] [Figure 1]1 is a perspective conceptual view showing an example of a storage box that constitutes the wrap film product of the present invention. [Figure 2] FIG. 3 is a perspective conceptual view showing another example of a storage box that constitutes the wrap film product of the present invention. [Figure 3] FIG. 1 is a conceptual diagram showing an example of a cutting tool that constitutes the wrap film product of the present invention. [Figure 4] This is a photo of test (c) being conducted. [Figure 5] FIG. 1 is a conceptual diagram of the positional relationship between the wrap film and the cutting tool in test (C). [Explanation of symbols]

[0057] 1: Front plate 2:Bottom plate 3: Back plate 4: Right side plate 4': Left side plate 5: Lid plate 6: Cover piece 7: Right cover flap 7': Left cover flap 8: Right side panel flap 8': Left panel flap 9: Cutting tool 10, 10': Jig used in test (c) 11: Cutting tool set on the upper load cell 12: Wrap film attached to the jig 13: Cutting blade extension direction of cutting tool 14: Horizontal direction of the wrap film stretched on the jig 15: Angle between the direction of extension of the cutting blade of the cutting tool and the horizontal direction of the wrap film stretched on the jig 16: Normal vector to the side of the cutting tool 17: Machine direction of wrap film stretched on jig

Claims

1. A wrap film product, A roll of wrap film is stored inside a roughly rectangular storage box, The material constituting the wrap film is a thermoplastic resin, a thermoplastic resin mixture, or a thermoplastic resin composition, The storage box has a saw blade-shaped cutting tool made of a metal material, The body of the storage box is made of a material with a twist angle of 20 to 180 degrees, The material has a basis weight of 600 g / m ２ These are the above paper materials, The wrap film is made of a polyvinyl chloride resin composition or a polymethylpentene-1 resin composition, The wrap film has a cutting strength of 0.5 to 6 N when cut by the cutting tool. The above wrap film products: Here, the twist angle is the twist angle of the material forming the body of the storage box, The twist angle was measured using a Crushberg flexibility temperature measuring device shown in Figure 3 of 9.8 of JIS K6773:1999, using a sample punched out of the back panel of a storage box in the shape shown in Figure 2 of the JIS standard, except that the thickness was the same as that of the material, so that the length direction of the sample coincided with the width direction of the back panel, and in accordance with the procedure of 9.8.3 of the JIS standard, except that the procedure was carried out in air at a temperature of 23°C and a relative humidity of 50%.

2. A wrap film product as described in claim 1, wherein the cutting strength of the wrap film when cut by the cutting tool is 0.5 to 3 N.

3. The wrap film product according to claim 1 or 2, wherein the storage box has a compressive strength of 50 N or more.

4. The wrap film product according to any one of claims 1 to 3, wherein the wrap film has a cutting displacement of 5 to 80 mm when cut by the cutter.

5. The wrap film product according to any one of claims 1 to 4, wherein the wrap film is made of a polyvinyl chloride resin composition.

6. The wrap film product according to any one of claims 1 to 4, wherein the wrap film is made of a polymethylpentene-1 based resin composition.

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