Storage container for food packaging wrap film

Abstract

This invention provides a food packaging wrap film storage container that makes it easy to smoothly pull out food packaging wrap film. [Solution] The food packaging wrap film storage container 1 comprises a rectangular parallelepiped container body 2 having an opening and closing lid 2a, a cylindrical core material 4 housed in the container body 2 and around which the food packaging wrap film 3 is wound, and a support member 5 that rotatably supports the core material 4. The support member 5 includes a shaft member 6 inserted into the core material 4 and a bearing member 7 that abuts the inner surface of the container body 2 in a non-rotatable manner and rotatably supports the shaft member 6 within the container body 2. In addition to the core material 4 being rotatably supported by the shaft member 6, the shaft member 6 is also rotatably supported by the bearing member 7, so that the core material 4 around which the food packaging wrap film 3 is wound can be rotated smoothly, making it easier to pull out the food packaging wrap film 3.

Description

Technical Field

[0001] The present invention relates to the field of food freshness preservation technology, and particularly relates to a wrap film storage container for food packaging in which a roll of plastic wrap film for food packaging is stored.

Background Art

[0002] Conventionally, as this type of wrap film storage container for food packaging, a roll storage box equipped with a roll body holding mechanism for smoothly pulling out the wrap film for food packaging from a roll body in which the wrap film for food packaging is wound around a cylindrical core material is known (Patent Documents 1, 2, etc.).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, even with the above conventional roll body holding mechanism, in the case of an extremely thin sheet such as a wrap film, it may be difficult to smoothly pull it out.

[0005] Therefore, the main object of the present invention is to provide a wrap film storage container for food packaging that makes it easy to smoothly pull out the wrap film for food packaging.

Means for Solving the Problems

[0006] To achieve the above objective, a food packaging wrap film storage container according to one embodiment of the present invention comprises a rectangular parallelepiped container body having an opening and closing lid, a cylindrical core material housed in the container body and around which food packaging wrap film is wound, a shaft member inserted into the core material, a bearing member that abuts the inner surface of the container body immovably and rotatably supports the shaft member within the container body, and a support member that rotatably supports the core material.

[0007] In one embodiment, the bearing member has a shaft hole, and the shaft member comprises a shaft body inserted into the shaft hole, and a flange formed at one end of the shaft body that engages with the peripheral edge of the shaft hole. [Effects of the Invention]

[0008] According to this invention, in addition to the core material being rotatably supported by the shaft member, the shaft member is also rotatably supported by the bearing member. This allows the core material around which the food packaging wrap film is wound to rotate smoothly, making it easier to pull out the food packaging wrap film. [Brief explanation of the drawing]

[0009] [Figure 1] Figure 1 is an exploded perspective view showing a first embodiment of a food packaging wrap film storage container according to the present invention. [Figure 2] Figure 2 is a perspective view of the food packaging wrap film storage container shown in Figure 1, with the support members indicated by solid lines and the other parts indicated by dashed lines. [Figure 3] Figure 3 is a perspective view showing a modified version of the bearing member, which is a component of the present invention, together with the shaft member. [Figure 4] Figure 4 is an exploded perspective view showing a second embodiment of the food packaging wrap film storage container according to the present invention. [Figure 5] Figure 5 is a perspective view of the food packaging wrap film storage container shown in Figure 5, with the support members indicated by solid lines and the other parts indicated by dashed lines. [Figure 6]Figure 6 is an exploded perspective view showing a third embodiment of the food packaging wrap film storage container according to the present invention. [Figure 7] Figure 7 is a perspective view of the food packaging wrap film storage container shown in Figure 6, with the support members indicated by solid lines and the other parts indicated by dashed lines. [Figure 8] Figure 8 is a schematic diagram conceptually showing one embodiment of a food packaging wrap film, which is a component of the present invention. [Figure 9] Figure 9 is a schematic diagram conceptually showing another embodiment of the food packaging wrap film, which is a component of the present invention. [Figure 10] Figure 10 is a flowchart showing the manufacturing process of food packaging wrap film according to the present invention. [Modes for carrying out the invention]

[0010] An embodiment of the food packaging wrap film storage container according to this invention will be described below with reference to the drawings. Throughout all drawings and embodiments, identical or similar components are denoted by the same reference numerals.

[0011] First, a food packaging wrap film storage container according to the first embodiment of the present invention will be described with reference to Figures 1 and 2. The food packaging wrap film storage container 1 comprises a rectangular parallelepiped container body 2 having an opening and closing lid 2a, a cylindrical core material 4 housed in the container body 2 and around which food packaging wrap film 3 is wound, and a support member 5 that rotatably supports the core material 4.

[0012] The support member 5 includes a shaft member 6 inserted into the core material 4 and a bearing member 7 that rotatably supports the shaft member 6.

[0013] In the first embodiment, a pair of support members 5, 5 are provided to support both ends of the core material 4, and each support member 5 is provided with a shaft member 6 and a bearing member 7.

[0014] The bearing member 7 is configured so that when it is housed in the container body 2 with its peripheral edge contacting the inner surface of the container body 2, it does not rotate within the container body 2. The bearing member 7 is not limited to the shape shown in the illustrated example, and it suffices that it can contact the inner surface of the container body 2 so as not to rotate within the container body 2. For example, it may have a different shape as shown in FIG. 3.

[0015] The shaft member 6 has a shaft body 6a inserted into a shaft hole 7a formed in the bearing member 7, and a flange portion 6b formed at one end of the shaft body 6a and engaged with the peripheral edge of the shaft hole 7a. The shaft body 6a has a truncated conical shape in the illustrated example, but can have various forms. The shaft body 6a of the first embodiment only needs to have a length that can be inserted into the end of the core material 4 and rotatably support the end of the core material 4. The outer diameter of the shaft body 6a is formed smaller than the inner diameter of the core material 4, whereby a gap is formed between the inner peripheral surface of the core material 4 and the outer peripheral surface of the shaft body 6a.

[0016] The shaft body 6a of the shaft member 6 is passed through the shaft hole 7a of the bearing member 7, and with the passed shaft body 6a inserted into both ends of the cylindrical core material 4, it is housed in the container body 2. The flange portion 6b is disposed between the bearing member 7 and the inner wall surface of the container body 2. One side surface of the flange portion 6b is locked by the peripheral edge of the bearing member 7, and the other side surface of the flange portion 6b is locked by the inner wall surface of the container body 2, whereby it is held between the bearing member 7 and the inner wall surface of the container body 2. The diameter of the shaft hole 7a of the bearing member 7 is the same as or smaller than the inner diameter of the core material 4, whereby the bearing member 7 can be locked to the end face of the core material 4.

[0017] The container body 2 can be provided with known cutting means for cutting the food packaging wrap film 3 pulled out from the core material 4. The cutting means is, for example, in one embodiment, a saw blade fixed to the free edge 2a1 of the opening / closing lid 2a, and in another embodiment, it can be a slider with a blade slidable along a rail portion attached to the container body (Japanese Patent Application Laid-Open No. 2022-185532, etc.).

[0018] In the food packaging wrap film storage container 1 having the above configuration, the core material 4 is rotatably supported on the shaft member 6, and the shaft member 6 is rotatably supported on the bearing member 7. This allows the core material 4 around which the food packaging wrap film 3 is wound to rotate smoothly, making it easier to pull out the food packaging wrap film.

[0019] Next, a second embodiment of the food packaging wrap film storage container according to the present invention will be described with reference to Figures 4 and 5.

[0020] In the second embodiment, a food packaging wrap film storage container has bearing members 7, 7 externally fitted to both ends of a single shaft member 6. The shaft member 6 comprises a shaft body 6a that is longer than the core material 4 and has an outer diameter smaller than the inner diameter of the core material 4, and a flange portion 6b provided on one end of the shaft body 6a. The bearing members 7 are the same as in the first embodiment. The bearing member 7 externally fitted to the other end of the shaft body 6a can be adjusted in thickness to match the gap inside the container body 2 so that the shaft body 6a does not come out of the shaft hole 7a.

[0021] In the second embodiment of the food packaging wrap film storage container 1, similar to the first embodiment, the core material 4 is rotatably supported on the shaft member 6, and the shaft member 6 is rotatably supported on the bearing member 7. This allows the core material 4 around which the food packaging wrap film 3 is wound to rotate smoothly, making it easier to pull the food packaging wrap film 3 out of the container body 2.

[0022] Figures 6 and 7 show a food wrap film storage container according to a third embodiment of the present invention. The third embodiment of the food wrap film storage container 1 differs from the second embodiment in that the shaft member 6 constituting the support member 5 consists only of the portion corresponding to the shaft body (6a) of the second embodiment, and does not have a portion corresponding to the flange portion (6b) of the second embodiment. In the third embodiment of the food wrap film storage container 1, the thickness of the bearing member 7 is adjusted so that the shaft member 6 does not come out of the shaft hole 7a of the bearing member 7 inside the container body 2. The length of the shaft member 6 is adjusted to match the inner dimensions in the longitudinal direction of the container body 2.

[0023] In one embodiment, the food packaging wrap film 3 wound around the core material 4 has a barrier layer 3a and an adsorption layer 3b in the order from the outside to the inside, as shown in Figure 8. Note that Figure 8 is merely a conceptual schematic diagram shown to understand the cross-sectional structure.

[0024] The barrier layer 3a can be a mixture of polyethylene and polypropylene, and the adsorption layer 3b can be a thermoplastic elastomer SEBS. The barrier layer 3a may contain 70-75% polyethylene and 25-30% polypropylene by weight. Polyethylene has good low-temperature toughness, corrosion resistance, abrasion resistance, and transparency. Polypropylene has high strength, relatively good oil resistance, gas barrier properties, moisture resistance, high rigidity, high heat resistance, and good physical or chemical stability. Therefore, copolymerization of the two can fully utilize the advantages of each, while simultaneously possessing high transparency and good flexibility.

[0025] The adsorption layer 3b, by using thermoplastic elastomer SEBS as its main raw material, can achieve a good self-adsorption effect. SEBS has excellent temperature resistance, with a brittleness temperature of -60°C or lower, a maximum operating temperature of 149°C, and a decomposition temperature exceeding 270°C in an oxygen atmosphere. It also has excellent aging resistance, with a performance degradation rate of less than 10% after aging for one week in an artificial accelerated aging box, and a performance degradation rate of less than 10% after aging for 100 hours in ozone aging (38°C). Furthermore, it has excellent electrical properties, with a dielectric constant of 1.3 × 10⁻¹⁰ at 1 kHz. -4 , 2.3 × 10 at 1 MHz -4 Therefore, the volume resistance is 9 × 10⁻¹⁰ 16 It is Ω / cm, and 2 × 10⁻⁶ in 2 minutes. 17 The solubility is Ω / cm. Due to its good solubility, blendability, and excellent oil-filling properties, SEBS can be dissolved in many common solvents, with a solubility parameter between 7.2 and 9.6, and can be blended with a wide variety of polymers.

[0026] The adsorption layer 3b can contain nanosilver particles in the thermoplastic elastomer SEBS, and can contain 96-99% thermoplastic elastomer material and 1-4% nanosilver particles by weight. By including nanosilver particles in the adsorption layer 3b, antibacterial properties can be imparted. The adsorption layer 3b has multiple recesses 3b1 on the adsorption surface side. The diameter of the recesses 3b1 can be 0.5-2.0 mm, and the distance between adjacent recesses 3b1 can be 0.5-2.0 mm. The thickness of the food packaging wrap film 3 is generally about 10 μm. The barrier layer 3a and the adsorption layer 3b can have the same thickness. By forming the recesses 3b1, the contact area between the antibacterial components in the adsorption layer 3b and the food can be increased, further enhancing the antibacterial effect of the wrap film.

[0027] Referring to Figure 9, the food packaging wrap film 3 may have an intermediate layer 3c between the barrier layer 3a and the adsorption layer 3b. The intermediate layer 3c can be a molten blend of high-density polyethylene, low-density polyethylene, and linear low-density polyethylene, possessing the good puncture resistance and relatively high tensile strength of linear low-density polyethylene, while also having relatively good workability. It can contain, by weight %, 50-60% high-density polyethylene, 10-15% low-density polyethylene, and 30-35% linear low-density polyethylene. The intermediate layer 3c can have the same thickness as the barrier layer 3a or the adsorption layer 3b. Low-density polyethylene (LDPE) has good flexibility and tear resistance, as well as properties such as waterproofing, moisture resistance, and oxidation prevention, which can contribute to the effective protection of food freshness and nutritional value.

[0028] By adopting the multi-layered composite structure described above, the food packaging wrap film 3 can effectively prevent bacteria and achieve better antibacterial and freshness-preserving effects.

[0029] Table 1 shows the experimental results of the various performance characteristics of the food packaging wrap film. The food packaging wrap film 3 shown in Table 1 has a barrier layer 3a which is a mixture of 70% polyethylene and 30% polypropylene by weight, an intermediate layer 3c which is a melted blend of 50% high-density polyethylene, 15% low-density polyethylene, and 35% linear low-density polyethylene by weight, and an adsorption layer 3b which contains 96% thermoplastic elastomer SEBS and 4% nanosilver particles. The ratio of the thicknesses of the barrier layer 3a, intermediate layer 3c, and adsorption layer 3b is 1:1:1, and the adsorption layer 3b has several recesses on the adsorption surface (inner surface) that is used to adsorb onto the object to be adsorbed. The diameter of these recesses is 1.0 to 1.5 mm, and the distance between two adjacent recesses is 1.0 to 1.5 mm.

[0030] [Table 1]

[0031] Figure 10 is a process flow chart showing the manufacturing process of the food packaging wrap film described above, and the specific step S1 is as follows: S1. The raw materials for the barrier layer, intermediate layer, and adsorption layer are blended accordingly; S2. The raw materials for the barrier layer, intermediate layer, and adsorption layer are placed in a casting extruder. The temperature and linear speed of the casting extruder are adjusted, and the materials for the barrier layer are extruded by screw A, the materials for the intermediate layer by screw B, and the materials for the adsorption layer by screw C. The materials are co-extruded using the three screws and combined to form an antimicrobial wrap film. Here, the linear velocity of the machine is 42 m / s; Screw A temperatures: Stage 1 160°C - Stage 2 170°C - Stage 3 170°C - Stage 4 170°C; Flow path temperatures: Stage 1 180°C - Stage 2 180°C - Stage 3 180°C; B screw temperature: Stage 1 160°C - Stage 2 170°C - Stage 3 170°C - Stage 4 170°C - Stage 5 180°C - Stage 6 180°C; Flow path temperature: Stage 1 180°C - Stage 2 180°C - Stage 3 180°C; C-screw temperature: Stage 1 160°C - Stage 2 170°C - Stage 3 170°C - Stage 4 170°C; Flow path temperature: Stage 1 180°C - Stage 2 180°C - Stage 3 180°C; Die head temperatures: Stage 1 180°C - Stage 2 180°C - Stage 3 170°C - Stage 4 170°C - Stage 5 170°C - Stage 6 180°C - Stage 7 180°C; S3. After stretching the food packaging wrap film in a casting extruder, the adsorption layer of the food packaging wrap film is pressed with a roller wheel mold having an uneven surface to form recesses, then it is cooled and shaped, the surface is processed and it is wound up.

[0032] S4. The rolled-up food-grade plastic absorbent wrap film is inspected, and approved products are selected, packaged, and sold. Unapproved products are crushed, high-temperature extruded, and then re-molded into multi-layer co-extrusion for recycling.

[0033] The food packaging wrap film manufactured by the above process effectively slows oxidation and growth of surface microorganisms in food and meat products under refrigerated conditions of 0-4°C, prevents leakage, effectively extends the shelf life of refrigerated fresh foods, reduces costs, and maximizes the preservation of the food's original flavor and nutritional value.

[0034] The embodiments described above are for illustrative purposes only, to illustrate the technical idea and features of the present invention, and their purpose is to enable those skilled in the art to understand and implement the present invention, without limiting the scope of protection. All equivalent transformations or modifications made in accordance with the spirit of the present invention shall be included within the scope of protection. For example, the food packaging wrap film wound around the core material is not limited to the embodiments described above, but may be other food packaging wrap films. [Explanation of Symbols]

[0035] 1. Storage container for food packaging wrap film 2. Container body 2a Open / close lid 3. Wrap film for food packaging 4 Core material 5. Support Member 6 Shaft member 6a Axis body 6b Tsubabe 7 Bearing component 3a Barrier layer 3b Adsorption layer 3c middle class 3b1 recess

Claims

1. A rectangular parallelepiped container body with an opening and closing lid, A cylindrical core material housed in the container body and wrapped with food packaging wrap film, A support member comprising a shaft member inserted into the core material, a bearing member that abuts the inner surface of the container body in a non-rotatable manner and rotatably supports the shaft member within the container body, and a support member that rotatably supports the core material, A food packaging wrap film storage container equipped with the following features.

2. The bearing member has an axial hole, The shaft member comprises a shaft body inserted into the shaft hole, and a flange formed at one end of the shaft body that engages with the peripheral edge of the shaft hole. A food packaging wrap film storage container according to claim 1.

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