JPH0441067Y2 - - Google Patents

Description

[Detailed explanation of the idea] [Industrial application field]

The present invention relates to cardboard containers, such as cardboard boxes.

[Conventional technology]

When transporting packages made of cardboard containers such as cardboard boxes to a remote location, the containers are stacked on top of each other in multiple tiers before being carried out, transported, and brought in. During operations such as carrying out, transporting, and bringing in containers such as cardboard boxes, the containers stacked in multiple tiers may start to slide due to impact applied to the containers or tilting of the cargo, which may cause the cargo to collapse. It is becoming. For this reason, for example, 1. When carrying out operations such as carrying out, transporting, and bringing in containers, it is necessary to wrap containers stacked in multiple tiers with synthetic resin films or sheets, or tie them with bands. Furthermore, applying mechanical means such as fixing them with wooden frames, 2. Temporarily fixing the contact surfaces of containers stacked one above the other with adhesive, 3. Spraying sand grains, etc. on the outer surface of the containers. Container with anti-slip layer (JP-A-Sho)
49-26090). 4 Furthermore, it is conceivable to use a container in which an anti-slip layer such as that described in Japanese Patent Publication No. 56-18152, that is, an anti-slip layer made of a foamed synthetic resin layer, is formed on the outer surface of the container. .

[Problem that the idea aims to solve]

However, methods for preventing stacked containers from collapsing using the mechanical means described in item 1 above include wrapping containers stacked in multiple tiers with a synthetic resin film or sheet, or wrapping them with a band. Not only is it troublesome to attach mechanical means such as tying them together or even fixing them with wooden frames, but when unloading and reloading multiple containers, it is necessary to have to do something again. Since it is necessary to add anti-slip means, it is difficult to carry out the container,
It is not possible to transship cargo throughout the entire process of transportation, loading, etc. In addition, the method of preventing cargo collapse by temporarily fixing the abutting surfaces of containers with adhesive as described in item 2 above involves gluing the containers at the same time as loading the containers, so it is difficult to This is complicated, and furthermore, its effectiveness is completely lost after the cargo is transshipped. Furthermore, if a sprayed layer of sand grains or the like is formed on the outer surface of the container described in item 3 above, the container cannot be carried out.
During transportation and other processes, friction between containers causes particles of sand blown onto the outer surface of the containers to fall, so when containers are transported, transported, and brought in, it is necessary to take sufficient anti-slip measures. Performance cannot be obtained. Furthermore, since the printed layer of letters, patterns, etc. normally applied to the outer surface of the container is hidden by the anti-slip layer, the effect of the printed layer applied to the outer surface of the container is impaired. Furthermore, when containers are stacked and handled, the surface of another container that is in contact with the anti-slip layer is damaged by the anti-slip layer, which has the disadvantage of impairing the appearance of the container. Furthermore, in the case of using an anti-slip layer made of a foamed synthetic resin layer according to item 4 above, since the anti-slip layer is formed as an opaque layer, a sprayed layer of sand grains etc. as described in item 3 above is formed on the outer surface of the container. As in the case of the container, the printed layer of letters, pictures, etc. normally applied to the outer surface of the container is hidden by the anti-slip layer, and the effect of the printed layer is impaired. In addition, the foamed resin layer itself is weak in mechanical strength, such as tear strength and tensile strength, and the adhesive strength between the container and the foamed resin layer is not sufficient. The anti-slip layer tends to fall off due to the friction that the container receives during the process, and the anti-slip layer is not strong enough to withstand repeated use. On the other hand, the cardboard container with anti-slip properties of the present invention can be obtained by stacking containers in multiple tiers and wrapping them with a synthetic resin film or sheet, for example. Or, there is no need to attach complicated mechanical means such as tying with bands, and moreover, it has the same permanent anti-slip properties even after reshipment as before reshipment,
Furthermore, the present invention provides a cardboard container having an anti-slip property that prevents the printing layer such as letters and designs usually attached to the outer surface of the container from being hidden by the anti-slip layer.

[Means to solve the problem]

The cardboard container with anti-slip properties of the present invention is
It has a trunk wall, a bottom wall, and an upper wall, and is provided with an anti-slip layer on the outer surface of at least one of the bottom wall and the upper wall, and the anti-slip layer is , a group of non-expanded hollow particles of thermoplastic synthetic resin with a diameter of 10 to 50 μm containing one or more of inert gas, active gas, non-vaporizable liquid, or vaporizable liquid, and a binder made of a polymeric compound. It consists of transparent layers connected by components. Hereinafter, the structure of the cardboard container having anti-slip properties of the present invention will be explained with reference to the drawings. A cardboard container 1 having anti-slip properties of the present invention shown in the first illustrated embodiment is a cardboard box having a body wall 2, an upper wall 3 serving as a lid, and a bottom wall 4. An anti-slip layer, designated by ₇ , is formed on the outer surface portion of the upper wall portion 3, which is the lid, designated by 31. As shown in the enlarged view of FIG. 2, the anti-slip layer 7 is a thermoplastic synthetic material with a diameter of 10 to 50 μm containing one or more of inert gas, active gas, non-vaporizable liquid, or vaporizable liquid. It is formed of a transparent layer in which a group of non-foamed microparticle hollow bodies 5, 5, 5, etc. made of resin are connected by a binder component of a polymer compound 6. In addition, the part indicated by the symbol 8 in Fig. 2 is
This is a corrugated board formed by adhering and laminating two paper layers 9 and 10 with a corrugated sheet 11 in between, and is the constituent material of the cardboard container 1 described above. In the cardboard container 1 shown in the illustrated embodiment, the anti-slip layer 7 is partially formed on the outer surface of the upper wall 3 of the cardboard container.
may be formed on the outer surface of at least one of the bottom wall 4 and the upper wall 3 of the cardboard container 1, and may be formed over the entire outer surface of the wall. Alternatively, it may be formed partially in the form of spots, grids, stripes, etc. The anti-slip layer 7, which is a transparent layer, is made of a water dispersion containing non-foamed fine spherical hollow bodies 5, 5, 5... made of a thermoplastic synthetic resin and a polymer compound 6, which is a film-forming component that acts as a binder. The coating agent obtained by almost uniformly mixing and dispersing the coating agent in a liquid or an organic solvent liquid is applied to a predetermined location on a cardboard container, cardboard for box making, a blank sheet immediately before the box making process, etc. It can be easily applied to predetermined areas of paper before the lamination process to obtain laminated paper for use by, for example, printing, using a coating method such as a roll coater, curtain coater, or spray painting, and then drying. can get. In addition, when preparing the coating agent used in forming the anti-slip layer 7 consisting of a transparent layer, in other words, the above-mentioned non-foamed fine spherical hollow bodies 5, 5, 5, etc. made of thermoplastic synthetic resin are used. When preparing a coating agent obtained by substantially uniformly mixing and dispersing the polymer compound 6 in an aqueous dispersion or an organic solvent containing the polymer compound 6 that acts as a binder, Microparticle hollow body 5 in non-foamed state
The non-foamed microsphere hollow body 5 made of the thermoplastic synthetic resin so as not to be dissolved by the aqueous dispersion or organic solvent liquid containing the polymer compound 6 acting as a binder; Of course, an aqueous dispersion or an organic solvent solution containing the polymer compound 6 that acts as a binder must be selected. In addition, the fine spherical hollow bodies 5, 5, 5, made of thermoplastic synthetic resin in the anti-slip layer 7 made of the transparent layer are also included.
As illustrated in FIG. 3, the wall film 12 is made of thermoplastic synthetic resin, and the inside surrounded by the wall film 12 contains an inert gas, an active gas, a non-vaporizable liquid, or It is a non-foamed type with a diameter of 10 to 50 μ and contains one or more types of vaporizable liquid.
The thermoplastic polymer particles described in Japanese Patent No. 113338 can be used as they are. That is, the fine spherical hollow bodies 5 made of thermoplastic synthetic resin in a non-foamed state are made of, for example, ethane, ethylene,
Hydrocarbons such as propane, butane, isobutane, butene, acetylene, heptane, CCl ₃ F, CCl ₂
Chlorofluorocarbons such as F ₂ and CClF ₃ , tetraalkyl silanes such as tetramethylsilane, trimethylethylsilane, and trimethylisopropylsilane, inert gases, active gases, and non-volatile gases such as petroleum ether, water, nitrogen, carbon dioxide gas, etc. Contains one or more liquids or vaporizable liquids, such as polymers or copolymers of vinylidene chloride, acrylonitrile, vinyl chloride, acrylic esters, methacrylic esters, styrene, vinyl acetate, etc. Made of thermoplastic synthetic resin
It consists of a hollow body of 10-50μ. In the anti-slip layer 7, the binder component of the polymer compound 6 in the coating agent used to form the anti-slip layer 7, which is the transparent layer, is used to form hollow fine particles 5, 5 made of non-foamed thermoplastic synthetic resin. ……
It is a polymer compound made of general synthetic resin or elastomer compound, such as vinyl acetate resin, ethylene/vinyl acetate resin, acrylic resin, styrene resin, vinyl chloride resin, vinyl acetate/acrylic resin. Resins, vinyl chloride/vinyl acetate resin, ethylene/acrylic resin, vinylidene chloride resin, polyester resin, polyurethane resin, chloroprene polymer, nitrile rubber, styrene/butadiene copolymer, methacryl/styrene copolymer, etc. are used. In the anti-slip layer 7 made of the transparent layer, the ratio of the polymer compound 6, which is a film-forming component that acts as a binder in the layer, and the microparticle hollow bodies 5 made of a non-foamed thermoplastic synthetic resin is as follows: Depending on the size of the hollow body 5, the polymer compound 100
It is preferable that the hollow microparticles be composed of about 50 to 500 parts by weight based on parts by weight. In addition, in the microparticle hollow body, the thermoplastic synthetic resin constituting the microparticle hollow body may contain an inert gas, an active gas, which is a built-in substance of the microparticle hollow body,
The thermoplastic synthetic resin constituting the microsphere hollow body and the type of internal components are selected in combination so that they will not dissolve or swell due to non-vaporizable liquids or vaporizable liquids. Of course. In addition, when the above-mentioned microsphere hollow body 5 is placed in a heated atmosphere, the thermoplastic synthetic resin constituting the microsphere hollow body 5 softens, and furthermore, the built-in material inside the hollow body 5 softens. The expansion of the inert gas, active gas, non-vaporizable liquid, or vaporizable liquid 13 results in expanded foam particles, making it impossible to provide the above-mentioned anti-slip layer 7 with transparency. Therefore, when forming the anti-slip layer 7 made of a transparent layer,
Care must be taken to ensure that the thermoplastic synthetic resin microparticle hollow bodies 5 in the anti-slip layer 7 do not become expanded particles due to heating. Therefore, when forming the anti-slip layer 7, the thermoplastic synthetic resin that constitutes the wall of the microsphere hollow body 5 is softened, and the inert gas, active gas, non-vaporizable liquid, and vaporizable It is necessary to avoid heating to a temperature that would cause the built-in contents 13 such as liquid to expand, and in particular, care must be taken against heating during the process of drying the coating agent.

【Example】

The specific structure of the cardboard container having anti-slip properties of the present invention will be explained using examples. Example 1 A 50% solid aqueous dispersion containing the following (1) and (2) was placed on the entire top and bottom surfaces of a ready-made cardboard box measuring 34 cm long, 28.5 cm wide, and 14.0 cm high. Coating agent [A] consisting of 3.5g (solid content)/m ²
After coating at a ratio of 1, and drying at room temperature, a cardboard container (I), which is an example of the present invention and has an anti-slip layer made of a transparent layer, was obtained. (1) Ethylene/vinyl acetate copolymer emulsion
...100 parts by weight (solid component) "Particle size ...0.7μ, nonvolatile content ...50%, viscosity ...500cps" (2) Hollow vinylidene chloride granules
...100 parts by weight "Built-in contents ...butane, sphere diameter ...10-20μ" Example 2 A coating agent with the following composition [ After applying B] at a rate of 3.5g (solid content)/ ^m2 ,
By drying at room temperature, a cardboard container ( ), which is another example of the present invention, having an anti-slip layer made of a transparent layer was obtained. Coating agent [B] (1) Ethylene/vinyl acetate copolymer emulsion
...100 parts by weight (solid component) "Particle size...0.65μ, non-volatile content...55%, viscosity...6000cps" (2) Hollow vinylidene chloride granules
...100 parts by weight "Built-in contents ...butane, sphere diameter ...10-20μ" (3) Water ...20 parts by weight Example 3 The top surface of the same ready-made cardboard box used in Example 1 5 over the entire surface and bottom surface.
Coating agent [A] having the same composition as that used in Example 1 above was applied in stripes with a width of 15 mm with intervals of
A cardboard container () which is another embodiment of the present invention and has an anti-slip layer made of a transparent layer by coating at a rate of 3.5 g (solid content)/m ² and drying at room temperature.
I got it. Example 4 On the top and bottom surfaces of the same ready-made cardboard box as used in Example 1, stripes of 15 mm in width with intervals of 5 mm were placed over the entire surface of the same as in Example 1. Coating agent [A] with the same composition as the one used was applied in an amount of 3.5 g on the application area.
(solid content)/m ² and dried at room temperature to obtain a cardboard container (), which is an example product of the present invention and has an anti-slip layer made of a transparent layer. Example 5 On the top surface of the same ready-made cardboard box as that used in Example 1, stripes with a width of 15 mm were placed at intervals of 5 mm over the entire surface of the cardboard box described in Example 1.
After applying the coating agent [A] having the same composition as that used in the coating area at a coating amount of 3.5 g (solid content)/m ² on the coated area and drying at room temperature, an anti-slip layer consisting of a transparent layer was formed. A cardboard container (), which is an example product of the present invention, was obtained. Example 6 Coating agent [C] having the following composition was applied to the entire top and bottom surfaces of the same ready-made cardboard box as that used in Example 1 at a rate of 3.5 g (solid content)/m ² . By drying at room temperature, a cardboard container (), which is an example product of the present invention and has an anti-slip layer made of a transparent layer, was obtained. Coating agent [C] (1) Acrylic acid ester emulsion
...100 parts by weight (solid component) "Particle size...1μ, non-volatile content...55%, viscosity...2000cps" (2) Hollow vinylidene chloride granules
...100 parts by weight "Built-in contents ...butane, sphere diameter ...15-30μ" (3) Water ...20 parts by weight Example 7 The top surface of the same ready-made cardboard box as used in Example 1 and 3.5 g (solid content)/m ² of coating agent [D] consisting of an aqueous dispersion containing the following (1) and (2) with a solid content of 52% by weight was applied to the entire bottom surface.
After coating at a ratio of 1, and drying at room temperature, a cardboard container (2), which is an example of the present invention and is provided with an anti-slip layer consisting of a transparent layer, was obtained. (1) Ethylene/vinyl acetate copolymer emulsion
...100 parts by weight (solid component) "Particle size ...0.7 μ, nonvolatile content ...55%, viscosity ...5500 cps" (2) Hollow microparticles of vinylidene chloride acrylonitrile copolymer ...150 parts by weight "Built-in contents: Isobutane, spherical shape: 10 to 20μ" Example 8 The following (1) and (2) were applied to the entire top and bottom of the same ready-made cardboard box used in Example 1. Coating agent [E] consisting of an aqueous dispersion with a solid content of 52% by weight is applied at a rate of 3.5 g (solid content)/m ² and dried at room temperature to form an anti-slip layer consisting of a transparent layer. A cardboard container ( ), which is an example of the present invention, was obtained. (1) Ethylene/vinyl acetate copolymer emulsion
...100 parts by weight (solid component) "Particle size ...0.7μ, nonvolatile content ...55%, viscosity ...1500cps" (2) Methyl methacrylate. Hollow microparticles of acrylonitrile copolymer...80 parts by weight "Built-in contents...isobutane, sphere diameter...10-20μ" Two identical cardboard containers obtained in the above examples A, Table 1 shows the results of measuring the angle (α) at which the container A on top starts to slide when containers B are stacked on a slope as shown in FIG. 4. In addition, the part indicated by the reference numeral 14 in FIG. 4 is a stopper that prevents the lower container B from sliding down. In addition, the container A, which is a reference item shown in Table 1, is the ready-made cardboard box itself used in each of the above-mentioned Examples. Furthermore, in container B, which is a reference product, a hot melt adhesive mainly composed of ethylene/vinyl acetate resin, wax, and petroleum resin is applied to the four corners of the top of the lower container B, which is made of a ready-made cardboard box. In the state shown in the figure, apply two strips of 40 mm long and 2 mm wide so that the center-to-center spacing between the stripes and S is 20 mm, and this coating agent becomes molten. During this time, a ready-made cardboard box that will become the upper container A is placed, and containers A and B are glued and fixed. Container C, which is a reference product, is a ready-made cardboard box with ethylene/vinyl acetate resin emulsion applied to the entire top and bottom surfaces at a rate of 3.5 g (solid content)/m ² and dried at room temperature. It is.

[Table] From the experimental results shown in Table 1 above, the cardboard container that is an example product of the present invention not only has excellent anti-slip properties in the cardboard container, but also can be loaded on the top and bottom. It can be confirmed that even when multiple containers are unloaded and reloaded, the anti-slip properties of the original container are maintained without deterioration.

[Function and effect of the idea]

The cardboard container with anti-slip properties of the present invention is
The unevenness caused by the non-foamed microsphere hollow bodies made of thermoplastic synthetic resin in the anti-slip layer affects the bottom wall and the top of a cardboard container that has a body wall, a bottom wall, and an upper wall. and the outer surface of at least one of the walls. Therefore, in the anti-slip layer of the cardboard container of the present invention, the non-foamed hollow particles made of thermoplastic synthetic resin in the anti-slip layer contain inert gas, active gas, non-vaporizable liquid, or vaporized It consists of a hollow body with a diameter of 10 to 50 μm containing one or more types of liquid, and due to the presence of these hollow particles, it has high elasticity and high restorability. Therefore, the anti-slip layer exhibits an extremely excellent anti-slip property. In addition, since the cardboard container of the present invention has a transparent anti-slip layer formed on the outer surface of the cardboard container, the numbers, letters, product names, and It does not damage the decorative printing etc. Furthermore, since the anti-slip layer in the cardboard container of the present invention can be obtained by only applying a coating agent to the cardboard container and drying the coating agent, the anti-slip layer can be easily formed. Moreover, it becomes an anti-slip layer that has excellent effects in terms of friction resistance. Furthermore, the anti-slip layer in the cardboard container of the present invention does not damage other cardboard containers that come into contact with the anti-slip layer, and exhibits excellent quality retention properties.

[Brief explanation of the drawing]

Figure 1 is a perspective view of a cardboard box, which is an example of the cardboard container with anti-slip properties of the present invention;
The figure is an enlarged cross-sectional view of a part of the cardboard container in Figure 1,
Figures 1 and 2 are enlarged cross-sectional views of non-foamed fine spherical hollow bodies made of thermoplastic synthetic resin used in the anti-slip layer of the cardboard container with anti-slip properties of the present invention, and Figure 4 is the cardboard container. Figure 5 is a side view illustrating the experimental method for measuring the anti-slip effect of the container used in the experiment. It is a top view explaining a position. 1...Cardboard container with anti-slip properties, 2...
...Body wall portion, 3...Top wall portion serving as a lid, 4...Bottom wall portion, 5...Hollow body of fine particles made of thermoplastic synthetic resin in a non-foamed state, 6...High molecular compound serving as a binder component , 7... anti-slip layer consisting of a transparent layer, 13...
...Inert gas, active gas, non-vaporizable liquid, or vaporizable liquid inert gas contained inside the thermoplastic synthetic resin microparticle hollow bodies 5.

Claims (1)

[Claims for Utility Model Registration] 1. It has a trunk wall, a bottom wall, and an upper wall, and an anti-slip layer is provided on the outer surface of at least one of the bottom wall and the upper wall. In the cardboard container, the anti-slip layer is a non-foamed container made of thermoplastic synthetic resin with a diameter of 10 to 50μ and containing one or more of inert gas, active gas, non-vaporizable liquid, or vaporizable liquid. 1. A cardboard container having anti-slip properties, comprising a transparent layer formed by connecting hollow microparticles with a binder component made of a polymer compound. 2. The anti-slip layer according to claim 1 of the utility model registration claim, wherein the anti-slip layer is formed over the entire outer surface of at least one of the bottom wall and the top wall of the cardboard container. A cardboard container with special characteristics. 3. The utility model according to claim 1, wherein the anti-slip layer is partially formed on a part of the outer surface of at least one of the bottom wall and the top wall of the cardboard container. Cardboard container with anti-slip properties.