JP4898267B2 - Anti-slip agent - Google Patents

Description

The present invention relates to an anti-slip agent, a packaging material with an anti-slip agent, and a package with an anti-slip agent.
In particular, in a package with a non-slip agent, the present invention relates to a package suitable for being transported or displayed by being stacked in the vertical direction.

Since the surface of the package is covered with an overprint (overcoat) layer mainly composed of a resin film such as PET (polyethylene terephthalate) or an acrylic resin, it is often relatively slippery.
For this reason, stacking such packages will cause a slight vibration, causing the contents to be deformed, destroyed, or spilled, and if the contents are food, it is not preferable in terms of hygiene, and stacks as it is. In addition, a great deal of labor is required.

  Therefore, as means for preventing such collapse, conventionally, it has been practiced to mold small irregularities on the upper and lower surfaces of the packaging body or to coat the surface of the packaging body with rubber so that the packaging bodies can be engaged with each other. (See Patent Document 1).

  However, when the concave and convex molds are formed on the upper and lower surfaces of the package, the design of the package is complicated, and the mold and the content filling line need to be remodeled significantly. There is a bulky problem.

On the other hand, when rubber is coated on the surface of the package, such problems can be solved, but since rubber usually has poor heat resistance, another problem that the anti-slip performance deteriorates due to heating during the manufacture of the package. Emerges.
In addition, when the contents are frozen desserts or dairy products, they need to be frozen or refrigerated, so that there is a problem that the rubber is cured under such a low temperature environment and the anti-slip performance is lowered.
JP 2005-126661 A

  Accordingly, an object of the present invention is to provide a non-slip agent or the like that can maintain performance under various environments without deterioration of performance like rubber, simply and inexpensively.

  As a result of intensive ingenuity to solve the above problems, the present inventors have found that an anti-slip agent containing a specific main component and an additive component has excellent properties, and has completed the present invention.

  Specifically, an anti-slip agent was formed by adding an additive component consisting of extender pigment and polyethyleneimine resin to the main component consisting of polyvinyl acetal resin.

  Further, a first additive component consisting of extender pigment and polyethyleneimine resin and a second additive component consisting of at least one selected from modified urethane resin, ketone resin and wax are added to the main component consisting of polyvinyl acetal resin. An anti-slip agent was formed.

  Then, at least a part of the surface of the packaging material is coated with the anti-skid agent to form a packaging material with the anti-slip agent, and the stored item is stored in the bag-like body made of the packaging material with the anti-slip agent. A package with attachment was formed.

  Further, the stored item was stored in a container, the opening was sealed with a lid, and at least a part of the surface of the container and the lid was coated with an anti-slip agent to form a package with the anti-slip agent.

These antiskid agents described above are particularly excellent in heat resistance.
For this reason, this anti-slip agent is coated on the surface of the packaging material and sealed with heat-adhering (heat-sealing) to the opening of the container using the anti-slip agent as a lid. However, even when forming a package, there is no possibility of peeling or dropping, and the anti-slip performance is not deteriorated.
Moreover, since the effect is exhibited only by applying to a known packaging material or the like, it can be used as it is without modifying the conventional manufacturing apparatus for packaging materials and the like, so it is simple and the cost is hardly changed.
Further, even in a low temperature atmosphere, the anti-slip performance is hardly deteriorated and the good anti-slip property is maintained.

  When the packaging material has a multilayer or single layer structure in the thickness direction and at least one layer is formed from a polyethylene terephthalate film, the polyethylene terephthalate is highly transparent, so it is suitable for use in a package that requires the contents to be seen through. is there.

  As mentioned above, this anti-slip agent has good anti-slip performance even in a low-temperature atmosphere, so it must be frozen or refrigerated. It is suitable for use in a package that contains the.

  According to the present invention, it is possible to easily and inexpensively provide an anti-slip agent capable of maintaining the performance under various environments without deteriorating the performance like rubber.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  The anti-slip agent according to the first embodiment is formed by adding an additive component composed of an extender pigment and a polyethyleneimine resin to a main component composed of a polyvinyl acetal resin.

By using a polyvinyl acetal resin as the main component of the anti-slip agent, adhesion to a packaging material, particularly a polyethylene terephthalate film (PET film) or an aluminum foil is improved.
Examples of the polyvinyl acetal resin include polyvinyl butyral, polyvinyl propional, polyvinyl formal, polyvinyl formal-butyral, polyvinyl acrylal, and polyvinyl acetoacetal.
Among these, polyvinyl butyral is particularly preferable.

Examples of extender pigments that are additives for anti-slip agents include inorganic particles such as silica, talc, calcium carbonate, barium sulfate, alumina, acid clay, clay, magnesium carbonate, carbon black, tin oxide, titanium white, mica, and glass. Can be used.
By using the extender, the heat resistance of the anti-slip agent is improved.
The average particle size of the extender is preferably 0.1 to 20 μm, more preferably 1 to 5 μm.
By setting it within these ranges, effects such as dispersibility and heat resistance are satisfactorily exhibited.
The amount of extender added to the anti-slip agent (based on solid content, the same shall apply hereinafter) is preferably 0.1 to 20% by weight, more preferably 0.3 to 5% by weight. Is good.
By setting it within these ranges, effects such as dispersibility, adhesion, and heat resistance are exhibited satisfactorily.

By using a polyethyleneimine resin as an additive component of the anti-slip agent, the heat resistance is further improved.
The addition amount of the polyethyleneimine resin to the anti-slip agent is preferably 0.1 to 5% by weight, and more preferably 0.2 to 1.5% by weight.
By setting it within these ranges, effects such as adhesion and heat resistance are exhibited well.

The anti-slip agent according to the second embodiment is selected from at least one of a main component consisting of a polyvinyl acetal resin, a first additive component consisting of an extender pigment and a polyethyleneimine resin, a modified urethane resin, a ketone resin and a wax. It is formed by adding a second additive component.
Hereinafter, description of the same components as the anti-slip agent of the first embodiment is omitted.

As the wax, for example, polyethylene wax, microcrystalline wax, paraffin wax and the like can be used, and among these, polyethylene wax is particularly preferable.
The amount of wax added to the anti-slip agent is preferably 0.05 to 2% by weight, more preferably 0.1 to 1% by weight.
By setting it within these ranges, the adhesion of the extender pigment in the anti-slip agent can be improved, and the extender pigment can be prevented from being lost.

As the ketone resin, for example, an acetone formaldehyde resin, a polyether ether ketone resin, an acetone furfural resin, or the like can be used, and among these, an acetone formaldehyde resin is particularly preferable.
The addition amount of the ketone resin to the anti-slip agent is preferably 0.05 to 2% by weight, and more preferably 0.1 to 1% by weight.
By setting it within these ranges, the adhesion can be further improved when the anti-slip agent is applied to an aluminum material or the like.

As the modified urethane resin, for example, polyester polyol-modified polyurethane, acrylic-modified polyurethane, silicon-modified polyurethane, esterimide-modified polyurethane and the like can be used, and among these, polyester polyol-modified polyurethane is particularly preferable.
The amount of the modified urethane resin added to the anti-slip agent is preferably 0.05 to 2% by weight, and more preferably 0.1 to 1% by weight.
By setting it within these ranges, the adhesion can be further improved when the anti-slip agent is applied to an aluminum material or the like.

In addition to the above, to the anti-slip agent according to the first and second embodiments, a dispersant, a coloring pigment, an anti-settling agent, a thickener, an antistatic agent, an antifogging agent, etc. may be added as necessary. You can also.
In addition, when preparing an anti-slip agent or applying to a packaging material, an organic solvent may be used as necessary. For example, MEK (methyl ethyl ketone), toluene, hexane, thinner, IPA (isopropyl alcohol), Methanol or the like can be appropriately selected.
A method for applying the anti-slip agent to the packaging material or the like is not particularly limited, and a known method such as brush coating, spray coating, roll coating, bar coating, or gravure printing can be employed.

Next, as an article to be coated with the anti-slip agent according to the embodiment, there is no particular limitation such as a packaging material, a container of a packaging body, a lid, etc., for example, polyethylene, polypropylene, polyester, vinyl chloride, nylon, Examples include various resin films such as cellophane, metal foil such as aluminum foil, coated paper, pure white roll paper, craft paper, high-quality paper, and imitation paper.
Among these, polyester (polyethylene terephthalate) and aluminum foil are preferable because the anti-slip agent has particularly good adhesion.
Above all, when a polyester film is used, it is suitable as a packaging material for packaging that needs to keep good transparency and see through the contents of food packaging in combination with a non-slip agent that does not contain a colorant. It is.

The application of the anti-slip agent to the packaging material or the like does not necessarily have to be performed on the whole, and for example, a site to be grasped with a finger, the upper surface, the lower surface, or both surfaces of the package may be selected as appropriate.
Also, the coating pattern is not particularly limited, and may be appropriately adjusted and selected in consideration of the anti-slip frictional force such as a lattice shape, lattice point shape, or parallel line shape.

Further, the anti-slip agent of the embodiment is particularly excellent in heat resistance.
Therefore, in order to use as a lid | cover thermally bonded to the flange of a container, etc., it is preferable to apply to various packaging materials provided with a heat bonding layer (heat seal layer) on the outer layer.
Examples of the thermal adhesive layer include polyacrylate, styrene-butadiene-ethylene block copolymer, acrylic-nitrile (AN), polyethylene (PE), polypropylene (PP), vinyl chloride-vinyl acetate-maleic acid terpolymer. , Ethylene-vinyl acetate (EVA), methyl methacrylate, polystyrene (PS) and the like can be employed.
Examples of such a packaging material with a non-slip agent having a thermal adhesive layer on the outer layer include the following.
1: Anti-slip agent / resin film / thermal adhesive layer 2: Anti-slip agent / resin film / aluminum foil / thermal adhesive layer 3: Anti-slip agent / resin film / aluminum foil / resin film / thermal adhesive layer 4: Anti-slip agent / Resin film / oxide-deposited resin film / thermal adhesive layer 5: anti-slip agent / aluminum foil / resin film / thermal adhesive layer 6: anti-slip agent / coated paper / resin film / thermal adhesive layer 7: anti-slip agent / resin Film / paper / resin film / thermal adhesive layer

The form of the article to which the anti-slip agent is applied is not particularly limited, and is a packaging bag such as a pillow bag, a gusset bag, a flat bag, a square bag, a self-supporting bag, paper, resin, glass, metal, and those. And various types of containers made of a composite material composed of two or more of the above and various types of lids.
In this case, the production method is not particularly limited, and examples of the resin include injection molding, film molding, blow molding, and extrusion molding.

  In the following, more detailed examples and comparative examples will be shown to further clarify the features of the present invention.

First, coating agents A to F for coating packaging materials according to Examples and Comparative Examples are composed of the following components.
The coating agent A is a mixture of 96% polyvinyl butyral resin, 3% silica powder, and 1% polyethyleneimine resin in a solid weight ratio (100% in total, the same applies hereinafter).
Coating agent B is a mixture of 95% polyvinyl butyral resin, 3% silica powder, 1% polyethyleneimine resin, and 1% polyester polyol-modified urethane resin in a solid content weight ratio.
The coating agent C is a mixture of 95% polyvinyl butyral resin, 3% silica powder, 1% polyethyleneimine resin, and 1% acetone formaldehyde resin in a solid content weight ratio.
The coating agent D is a mixture of polyvinyl butyral resin 95.5%, silica powder 3%, polyethyleneimine resin 1%, and polyethylene wax 0.5% in a solid content weight ratio.
The coating agent E is Toyobo Byron 20SS (polyester-based commercial ink).
The coating agent F is Ultima Z Clear (Clear Ink for Film) manufactured by Dainippon Ink and Chemicals, Inc.

  As a packaging material, PET film E5100 (single-sided corona treatment) having a thickness of 12 μm manufactured by Toyobo Co., Ltd. was used.

In Examples 1 to 4 and Comparative Examples 3 and 4, on the corona-treated surface of the packaging material made of this PET film, each of the coating agents A to F was dissolved in a solvent (0.8 g / m ² by dry weight). Examples 1 to 4 are diluted with MEK1: isopropyl alcohol 1 volume ratio mixed solvent, Comparative Examples 3 and 4 are MEK1: toluene 1 volume ratio mixed solvent), and applied to the entire surface by gravure method ( This was prepared by coating.
Comparative Example 1 uses a corona-treated surface of a packaging material made of PET without applying a coating agent as a test surface, and Comparative Example 2 uses a corona-untreated surface of a packaging material made of PET without applying a coating agent. Was used as a test surface.

  These samples were subjected to two types of tests, slip resistance and heat resistance, which will be described in detail below.

In the slip resistance test, first, a sample is fixed to a horizontal flat table with a clip with the outermost surface (test surface) of each sample facing upward.
On the test surface, a cup made of HIPS (high impact polystyrene) in which the weight is fixed with an adhesive tape so that the total weight becomes 100 g is placed.
As shown in FIG. 1, the bottom surface (contact surface) 10 of the HIPS cup is formed in a donut shape, the inner diameter is 50 mm, the outer diameter is 75 mm, and the contact area to the test surface is about 98 cm ^2. Yes.
Then, the angle θ at which the HIPS cup slides when a horizontal flat table is tilted was determined, and evaluation was performed by calculating a number obtained by multiplying tan θ by 100.
In addition, the above HIPS cup was frozen (in this case, without using a weight, filled with water to a total weight of 100 g, and frozen in the -18 ° C freezer) The same evaluation was carried out.
The results are shown in Table 1.
From the above calculation method, it is shown that the higher the numerical value of the slip resistance, the harder it is to slip.

From Table 1, it can be seen that in the examples, the slip resistance is good at both normal temperature and freezing temperature.
On the other hand, in Comparative Examples 1, 2, and 4, the calculated numerical value is about one-half that of the Example, indicating that the slip resistance is insufficient.

In the heat resistance test, a pure aluminum foil (1N30 soft material) having a thickness of 12 μm was layered on the test surface of each sample, and a hot plate heated to 120 ° C., 150 ° C., and 180 ° C. from the aluminum foil was 3 kg / cm ² . The pressure was applied to each sample for 1 second, and then the aluminum foil was peeled off by hand. The test surface of each sample and the state of the peeled surface of the peeled aluminum foil were visually evaluated.
The results are shown in Table 2.

  ○ in the table indicates that the transparency of the sample is maintained, △ indicates that the sample is slightly cloudy but no resin adheres to the aluminum foil, and × indicates that a large amount of resin is adhered to the aluminum foil , Each indicates that the coating agent is partially peeled from the sample.

From Table 2, it can be seen that in the examples, the transparency is maintained well at any temperature, the coating agent does not peel from the sample, and the heat resistance is sufficient.
On the other hand, in Comparative Examples 3 and 4, the sample may remain slightly cloudy at a relatively low temperature, but at a relatively high temperature, the coating agent peels off from the sample, and the heat resistance is poor. It turns out that it is enough.

The top view which shows the bottom part contact surface of the cup made from HIPS

Explanation of symbols

10 HIPS cup bottom contact surface

Claims (8)

  An anti-slip agent in which an additive component composed of extender pigment and polyethyleneimine resin is added to a main component composed of polyvinyl acetal resin.   Non-slip, in which a first additive component consisting of extender pigment and polyethyleneimine resin and a second additive component consisting of at least one selected from modified urethane resin, ketone resin and wax are added to the main component consisting of polyvinyl acetal resin Agent.   A packaging material with an anti-slip agent comprising the packaging material and the anti-slip agent according to claim 1 or 2 coated on at least a part of the surface of the packaging material.   The packaging material with a non-slip agent according to claim 3, wherein the packaging material has a multilayer or single layer structure in the thickness direction, and at least one layer thereof is formed of a polyethylene terephthalate film.   3. A container provided with an opening, a storage item accommodated in the container, a lid that seals the opening of the container, and at least a part of the surface of either or both of the container and the lid. A package with an anti-slip agent comprising the anti-slip agent described in 1.   A package with an anti-slip agent comprising a bag-like body formed from the packaging material with an anti-slip agent according to claim 3 or 4, and an item stored in the bag-like body.   The package with anti-slip agent according to claim 5 or 6, wherein the stored item is a frozen dessert.   The package with an antiskid agent according to claim 5 or 6, wherein the stored item is a dairy product.

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