JP2863847B2 - Stain prevention treatment container and method of manufacturing the same - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an antifouling treatment container which facilitates regeneration and recovery of the container by preventing the contents from remaining on the inner surface of the container, and a method of manufacturing the same.

[0002]

BACKGROUND OF THE INVENTION Printing inks, paints, adhesives, industrial materials and edible oils such as abrasives, the container contents to its inner surface, such as canned inevitably adhered residual contents that this residual adhesion Generally, it is generally discarded as it is because it is difficult to remove it. For this reason, the adhered residue leaks or produces a bad smell, which not only makes the waste storage place dirty, but also makes the treatment work hated or difficult,
It hinders container recovery and regeneration, which contributes to increased waste.

Therefore, in order to prevent the inside of the container from being stained,
Conventionally, measures such as putting an inner bag into the inner bag and filling the inner bag with the inner bag, and fitting a molded plastic sheet along the inner wall have been taken.

[0004]

However, the method of using an inner bag for a container requires not only that the bag be put in the container at the time of filling, but also that the contents must be sealed after filling. Is complicated. In addition, since the strength of the bag has a limit, leakage of the contents due to damage is easy to occur, and it is not easy to collect the contents adhered to the inside of the bag at the time of use. Due to problems, it has not been adopted except for some uses. On the other hand, the structure in which the molded plastic sheet is inserted along the inner wall can solve the above-mentioned drawbacks except for problems during the filling work such as the insertion at the time of filling and a mouth sealing method, but the molded article strength is somewhat high. However, it is not possible to contribute to the reduction of waste because the cost is high because of the necessity, and the sheet molding itself is bulky.

[0005] The present invention has such has been made in view of the conventional problems, without complication of the time filling work sector on and removal of the contents, the collection container and reproduction easily and smoothly It is an object of the present invention to provide a dirt prevention treatment container and a method of manufacturing the same, which can be performed.

[0006]

In the antifouling treatment vessel according to the present invention in order to solve the above problems SUMMARY OF THE INVENTION In container accommodating a predetermined content having biasing adhesion persistence, the inner surface of the container, A coating that covers the inner surface and is dissolved by a solvent that does not mix with the contents is closely arranged.

Here, the coating forms the coating.
Coating liquid on the inner surface of the container to form
is there.

Further, according to the manufacturing method of the present invention, there is provided a method for manufacturing a stain-prevention treatment container in which an inner surface of an upper opening-shaped container is provided with a cover capable of covering the inner surface and being peelable. On the inner bottom surface, a heat-peelable pressure-sensitive adhesive or adhesive is poured in an amount that spreads between the inner surface of the container and the cover, and the container on which the pressure-sensitive adhesive or adhesive is placed is heated. Then, a bag-shaped covering body along the inner surface is brought into close contact with the heated container and cooled, and the pressure-sensitive adhesive is preferably wax.

[0009]

In the above construction, after the use of the contents is completed,
The solvent is filled in a container in which a part remains.

[0010] Then, the coating dissolves from the inner surface of the container
Peels off and consequently adheres to the inner surface of the container through the
The contents that were peeled off from the inner surface. Therefore, peel
No work is required, just filling the solvent
It will be.

The coated body has an adhesive force that does not peel off against vibrations received during transportation or scraping of the contents, and also has a certain peeling force or heat (heating or irradiation of energy rays) on the processed material at the time of desorption. (Or cooling) treatment, injection of air or solvent into the gap, or dissolution with a solvent that does not mix with the contents, etc., allows the treated portion to be easily desorbed, and the internal deposits can be peeled off in a shape that can be easily post-treated. Processed and processed.

In the production method according to the present invention, first, a heat-soluble peelable pressure-sensitive adhesive or adhesive is first charged into the container, and then the pressure-sensitive adhesive or adhesive is applied to the container. The mounted container is heated. As a result, the pressure-sensitive adhesive or the adhesive is in a molten state, and in this state, the bag-like covering body along the inner surface of the container is inserted into the container and brought into close contact therewith. Then, the pressure-sensitive adhesive and the adhesive spread over the entire surface of the gap between the inner surface of the container and the outer surface of the cover, so that the operation of applying the pressure-sensitive adhesive or the adhesive to the inner surface of the container becomes unnecessary.

[0013]

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows the most basic embodiment of a dirt prevention treatment container according to the present invention. The container 1 is cylindrical and has a bottom wall 2, a peripheral wall 3 and an opening 4, and usually has a strength. Metal or plastic containers are used from the viewpoints of ease of handling and ease of use, but glass, ceramics, wood, paperboard and the like are used depending on the application.

On the inner surface 5 of the container 1, a cover 6 is disposed in close contact with the inner surface 5. The cover 6 has a close contact force with the inner surface 5 and is in the form of a sheet that is easy to peel off. It is not eroded by the contents contained in it, and has a strength that does not break when scraping the contents. I do. Further, the cover 6 is formed into a bag shape conforming to the shape of the inner surface 5, and has a flexibility when the cover 6 formed into the bag shape is loaded into the container 1.
In many cases, properties that can be drawn by heat are desirable, and in order to satisfy these properties, plastics, metal foils, laminates thereof, or composites such as paper and cloth reinforced with these are used.

As the plastic, polyethylene (P
E), polypropylene (PP), polyvinyl chloride (PV)
C), polyvinylidene chloride, polyesters (PET) such as polymono-di-tri-tetrafluoroethylene, polyethylene-propylene-butylene-terephthalate, rubbers such as polyvinyl-acetal (POM), polyisoprene-isobutylene-butadiene, silicone resins, Acrylic resin, polyvinyl acetate, polyvinyl alcohol, polyamide resin, polyurethane, epoxy resin, cellulose derivative, proteins such as gelatin, albumin, casein, starch and modified starch, agar, polysaccharides such as sodium alginate, gum arabic, phenol Resins, urea resins, melamine resins, alkyd resins, and the like, and copolymers thereof, may be used alone or in combination.

When the coating 2 is formed into a bag in advance and loaded, PE, PP, PET, POM, or a cellulose derivative is preferably used. When the inner surface is to be treated by hot-melt coating or hot stretching, PE is preferably used. , PP or copolymers thereof are used, and waxes for improving fluidity may be added as necessary.

When the coating 6 is formed on the inner surface 5 by coating, it is preferable to coat the inner surface 5 with a UV / EB-curable resin solution or to coat the inner surface 5 with a solvent evaporation type resin solution. An epoxy resin or a copolymer resin thereof is used, which can form a film having sufficient strength so that the contents are not eroded by irradiation with energy rays or heat treatment after coating, or the film is not broken at the time of scraping.

[0018] In the case where the contents are not mixed in water in an oily material, when formed by coating a coating material 6 is carboxy main Chiruseruro <br/> over scan, cellulose and water-soluble cellulose such as hydroxyethyl cellulose HEC as a coating liquid Derivatives, water-soluble acrylic copolymer resin, polyvinyl alcohol, gelatin, albumin casein, starch or modified starch, agar, sodium alginate, gum arabic, etc. are coated with a water-soluble resin and, when discarded, peeled off and treated. Alternatively, water may be injected to separate the internal deposits together with the coating 6 from the inner surface, and then scoop up and treat. In this case, it is effective that the water to be injected is warm water (hot water) or weakly alkaline.

Aluminum or steel is used as the metal foil, and these are particularly suitable for increasing the erosion resistance and air-permeability to the contents. Further, those combined with the plastic film are excellent in strength. A composite of these metal foils with PE, PP, PVC, a cellulose derivative or a copolymer thereof is preferably used.

The method of imparting the adhesion between the inner surface 5 of the container 1 and the coating 6 is as follows: (1) A bag-like coating 6 having a removable adhesive or adhesive on the outer surface, After applying such an adhesive / adhesive to the inner surface 5, the bag-shaped cover 6 is inserted into the container 1. (2) The coating 6 is formed by coating. (3) The cover 6 is brought into close contact with the vacuum.

In the case of (1), for example, a bag-shaped cover 6 having a removable adhesive or an adhesive on the outer surface is prepared in advance, and the bag-like cover 6 is placed in the container 1 to be spread and adhered. The inner surface 5 may be made to have the same size as the inner surface 5, or the cover 6 having a smaller shape may be stretched by heat at the time of mounting, or the larger shape may be thermally shrunk to fit the entire inner surface 5. In some cases, a sheet for forming the thick-film coating 6 and a means for causing the pressure-sensitive adhesive / adhesive composite to be in close contact with the inner surface while being extruded or a material plate of the container 1 and the coating And a method of extruding the laminate together.

The pressure-sensitive adhesive or adhesive used in this case has removability from the beginning and may have a certain degree of adhesion. The adhesive force is small or no, and the adhesive force is generated after mounting, for example, an anaerobic curing type or the one in which the adhesive force is generated by a curing action by heating / cooling or energy ray irradiation. Is also good. Further, a solvent that dissolves the pressure-sensitive adhesive or the adhesive at the time of peeling may be added, or the adhesive force may be reduced due to the above-described curing action to cause peeling.

In the case of (2), a bag-shaped covering 6 made of a thermoplastic plastic molded to be substantially the same size as the inner surface of the container is inserted as a coating means and then thermocompression-bonded by a method utilizing the adhesion force generated at the time of coating. How to make
After the hot-melted coating 6 is poured into a mold along the inner surface 5 and cooled and solidified, or hot-melted or a solvent-free liquid material or a solvent-soluble liquid material is applied or sprayed, then cooled, dried, and dried. The removable film may be formed by a curing treatment or the like.

In the case of (3), the cover 6 having a low air permeability, whose upper opening is extensible, is brought into close contact with the upper portion of the container 1, and the container 1 or the exhaust or intake port provided in the cover 6 is used for the container 1.
The air existing between the inner surface 5 and the coating 6 is discharged and brought into close contact with each other, and at the time of peeling, the air is sucked in from the same opening to be peeled. To describe this case (3) in more detail, as shown in FIGS. 2 and 3, a through hole 7 is provided in advance in the peripheral wall 3 of the container 1, and a rubber stopper 8 is fitted into the through hole 7. Then, the air between the cover 6 and the container 1 is discharged through the injection needle pierced into the rubber stopper 8 to bring the cover 6 into close contact with the inner surface 5.
When the cover 6 is to be peeled off, the rubber stopper 8 is pulled out and air is supplied between the inner surface 5 of the container 1 and the cover 6, whereby the adhesion of the cover 6 to the inner surface 5 is released. You.

On the other hand, when the coating 6 is made to adhere or adhere to the inner surface 5, a pressure-sensitive adhesive or adhesive having removability is used. It may be provided at the time of adhering to the inside of the inner surface 5, or may be generated at the time of adhering or peeling. Acrylic, natural rubber, PE, PP, PB, PI
P, PIB and their copolymers are used, and preferably, a cross-linked acrylic resin, natural rubber, ethylene-vinyl acetate copolymer resin is used, and if necessary, rosin or its modified shellac, copal, dammar or petroleum resin For example, a tackifier or a wax may be blended and used.

[0026] <br/> the sticking Ke sometimes tacky or adhesive-tinged Do is, no peeling resistance, pasted after tacky or as occurs peelability or during peel adhesion occurs refastenable pressure-sensitive adhesive Or acrylic resin, natural rubber, PE, P as adhesive
P, PB, PIP, P U, epoxy resins and monomers or prepolymers and rosin or a modified product thereof forming the same of the copolymer, shellac, copal, as dammar and petroleum resins and waxes, beeswax, spermaceti, Animal wax such as lanolin, candelilla wax, carnauba wax, vegetable wax such as wood wax, rice wax, sugar cane wax, mineral wax such as montan wax, ozokerite, lignite wax, paraffin wax, microcrystalline wax, etc. Waxes, modified waxes such as montan wax derivatives, paraffin wax derivatives, microcrystalline wax derivatives, hydrogenated waxes such as caster wax, opal wax, low molecular weight polyethylene or PP and its derivatives, Waxes, synthetic waxes such as distearyl ketone, caproic acid amide, capric acid amide, pelargonic acid amide, capric acid amide, lauric acid amide, tridecyl acid amide, myristic acid amide, stearic acid amide, behenic acid amide,
Ethylene bi Susutearin acid amide, caproleic acid amide, amide oleate, amide linoleic acid, ricinoleic acid amide, fatty acid amide waxes such as linolenic acid amide, stearic acid, fatty acid waxes such as behenic acid, alcohol waxes such as stearyl alcohol And waxes such as phosphate ester waxes such as distearyl phosphate ester are used alone or in combination. Preferably, a monomer or prepolymer having an unsaturated group, an isocyanate group or an epoxy group and an acrylic resin, polyurethane, epoxy PE, PP, PB, EV in which a mixture with a resin is used or waxes such as vegetable wax, mineral wax, petroleum wax, low molecular weight PE or PP, fatty acid wax are used alone or compatible therewith.
Means for developing adhesiveness, adhesiveness, and peelability used by mixing with a resin such as A include a sealed state (anaerobic effect), heating and cooling, and irradiation with energy rays such as UV rays, high frequency waves, electromagnetic waves, and electron beams. Done.

These pressure-sensitive adhesives or adhesives may be applied to the inner surface 5 of the container 1 or to the outer surface of the cover 6 to be inserted. Then, if there is no tackiness or adhesiveness in the state where the coating 6 is peeled off, the adhesive or the adhesive may remain on the inner surface 5 of the container 1, but if not, it is desirable to remove it at the same time as peeling. Regarding the contamination of the container 1,
In some cases, contamination of the outer surface during use may be a problem, but this is prevented by conventional methods such as coating the outer surface packaging with a shrink film, applying a re-peelable film resin liquid to a release label, and forming the container 1 or the cover 6. Is possible.

Next, an embodiment attempted by the present inventors will be described. Example 1 (see FIG. 1) A 110 mm direct diameter steel container 1 (1 liter internal volume)
A removable acrylic resin adhesive (two-part curable adhesive Nissetsu KP1254 Nippon Carbide Engineering Co., Ltd.)
The coated body 6 made of a 25 μm PP film bag-shaped molded product coated with) is applied on the entire inner surface 5 without wrinkles.
The surplus portion 10 protruding from the opening 4 is bent to form the outer surface 1.
Affixed to 1. This is indigo UV with a viscosity of 1000 poise
The one containing the curable offset ink was stored at 40 ° C. for one month. This ink was taken out, and the ink adhered to the bottom portion 2 of the peripheral wall 3 of the container 11 via the cover 6 was scraped off with a plastic spatula. At this time, the cover 6 was not broken or moved. The excess portion 10 from which the content has been taken out is erected, and is peeled along the circumferential direction from one direction of the peripheral wall 3,
Finally, the bottom surface 2 was peeled off and removed together with the ink adhered inside the coating 6. The inner surface 5 of the container 1 was a clean container surface.

Example 2 (see FIG. 1) A 100 mm diameter bag-shaped coating 6 made of a 50 μm PE film obtained by applying an adhesive comprising a mixture of an ethylene vinyl acetate copolymer and a petroleum resin to the steel container of Example 1. And a part was adhered. The unattached portion was stretched by a hot roll and affixed so as not to cause wrinkles on the entire surface. The surplus portion 10 was bent while being stretched using a hot roll, and was brought into close contact with the outer surface 11 of the container 1.

The container 1 was charged with 200 poise silk screen ink mainly containing a red ketone solvent and stored at room temperature for one week. The contents could be taken out without any support, and the coating 1 was easily peeled off in the same manner as in Example 1 and the inner surface 5 of the container 1 was not stained at all.

Example 3 (see FIG. 1) Inner diameter 82 mm of a structure in which the inside can be sealed by a pressing lid
A urethane acrylic-based UV-curable coating solution was uniformly applied to the steel container 1 having a content of 0.5 liter in an amount of about 20 μm, and the entire surface was irradiated with ultraviolet rays to form a coated body 6 formed of a flexible cured film. The container 1 was filled with 50 poise black alkyd paint using a mineral terpene as a solvent, and allowed to stand at room temperature for one month. After the entire content was taken out, a part of the coating 6 was strongly scraped with a tip of a screwdriver to be flipped up, peeled off in the same manner as in Example 1, and taken out together with the attached content. After that, the container 1 was slightly stained at the portion where the lid was in contact, but was not stained at all other places.

Example 4 (See FIG. 1) An aqueous solution of carboxymethylcellulose was applied by spraying to the inner surface of a bucket-shaped PP container 1 having an upper inner diameter of 115 mm and a lower inner diameter of 110 mm in which the opening 4 was a screw cap, and was sprayed with about 15 μm The coating 6 was formed so as to have a thickness of. The UV curable adhesive was put into this container 1 and stored at 40 ° C. for one month, and the contents were taken out. The peripheral wall 3 and the bottom wall 2 were scraped off with a plastic spatula. There was no. This was peeled off in the same manner as in Example 1, but there were places where the coating 6 was difficult to peel off in some places. Such a part was easily peeled off by adding water with a small amount of spray and moistening. The inner surface after peeling was not contaminated at all by the contents.

Example 5 An aqueous solution of hydroxycellulose was applied to the entire inner surface of a mayonnaise bottle containing 450 CC so as to have a dry film thickness of about 10 μm, and dried, whereby a soluble coating was formed on the entire inner surface of the bottle. The ink of Example 2 was put in this, left at room temperature for one week, and the contents were taken out. 2% Na ₂ CO ₃
The solution was put and left for 24 hours. Most of the attached contents were peeled off and floated on the surface. This was scraped off, and the remaining deposits were easily peeled off only by gently rubbing with a metal spatula and floated on the surface. This was scooped up, the internal aqueous solution was discharged, washed with water and dried. The inner surface was collected from a container that was not contaminated by any contents.

Embodiment 6 (See FIG. 2) As shown in FIG. 2, a container 1 having an inner volume of 1 liter provided with a through-hole 7 in a peripheral wall 5 has a size to be in close contact with the inner surface 2 thereof. A cover 6 made of a PE bag having a thickness of 38μ molded into a shape such that the surplus portion 10 that can protrude is slightly smaller than the outer diameter of the container is inserted, and the surplus portion 10 is bent and stretched to adhere to the outer surface 11 of the container 1. I let it. Next, the injection needle connected to the exhaust pump is inserted into the rubber stopper 8 fitted in the through hole 7, and the air between the cover 6 and the container 1 is discharged to bring the cover 6 into close contact with the inner surface 5. The injection needle was pulled out and a seal was quickly stuck on the rubber stopper.

The ink of Example 1 was filled therein, and 40
After leaving for 1 month at 1 ° C., the contents were taken out, and the remaining residue was scraped off with a plastic spatula.
Cuts were made at the two points with a cutter, and the excess portion 10 was raised to pull up the cover 6. The deposit was taken out together with the coating 6, and the inner surface 2 of the container 1 was not contaminated at all.

Example 7 (see FIG. 1) A steel container 1 having the same shape as that of Example 4 is provided with a low cohesive anaerobic material comprising a mixture of 4 ethylene glycol diacrylate (4EGDA) and a urethane diacrylate thermoplastic urethane resin. Insert a bag-shaped cover 6 of the same shape as the inner surface where the curable pressure-sensitive adhesive is applied on the outer surface and having a total thickness of 35 μm laminated with aluminum foil and PP, and adhered tightly to the inner surface 5 of the container 1 so as not to wrinkle, Surplus part 1 protruding above
0 was bent and brought into close contact with the outer surface 11 of the container 1. After 24 hours from the insertion, the stickiness disappeared, and the sticking was made to such an extent that it did not move even if the surface was rubbed. The ink of Example 2 was added thereto, and after one month at room temperature, the contents were taken out. The surplus portion 10 was turned with a spatula, and the covering 6 was treated in the same manner as in Example 1.
Was stripped off and removed with the attached residue. After peeling, the inner surface of the container was not contaminated with the contents.

Example 8 (see FIGS. 4 and 5) As shown in FIG. 4, a covering 6 made of aluminum foil having a thickness of 15 μm and having a bag shape along the inner surface 5 of the container 1 was prepared in advance. Keep it. On the other hand, wax 9 (CF-42 manufactured by Toyo Petrite Co., Ltd.)
5) is input. At this time, the amount of the wax is about 1.5 g, which is the amount that spreads over the entire surface of the gap between the cover 6 and the inner surface 5 of the container 1 when the cover 6 is completely adhered. Next, the container 1 was heated to 90 ° C. to dissolve the wax 9 and the container 1 was heated.
The cover 6 is fitted into the inner surface 5 of the cover. Then, the melted wax 9 flows through the gap between the inner surface 5 and the outer surface of the coating 6, and spreads over the entire surface of both. Thereafter, when the cooling at room temperature the wax 9 solidifies, as shown in FIG. 5, the cover member 6 made of a bag-shaped aluminum foil was adhered to the inner surface 5 of the vessel 1 through the wax 9 solidified State
Even in this state, even when the coating 6 was rubbed, an adhesive property that did not move was obtained.

After the ink of Example 2 was added thereto and left at room temperature for one month, the contents were scraped off with a plastic spatula and peeled off by the method of Example 1. The inner surface 5 after peeling was in a state where the wax was coated on the entire surface, but the content was not contaminated at all, and the coated surface had no tackiness at room temperature and had no problem in handling. The container 1 may be heated to remove it, and when the container 1 is reused, the container 1 is heated as it is and the bag-shaped covering 6 made of aluminum foil can be adhered again, which is convenient. In addition,
In the eighth embodiment, the wax is used, but another adhesive or adhesive may be used.

[0039]

As described above, according to the antifouling treatment container of the present invention, the inner surface of the container is not mixed with the contents.
Coated with a coating that dissolves in a solvent
Therefore, there is no need to remove the coating,
Adhesive residue due to easy operation of only filling solvent
It is possible to remove the contents that have been removed.

According to the production method of the present invention, the container
No need to apply adhesive or adhesive on the inner surface
The cover can be easily attached, and
By using containers, new containers can be reused.
It is not necessary to put wax into the
The cover can be mounted.

[0041]

[Brief description of the drawings]

FIG. 1 is a vertical cross-sectional view showing one embodiment of a dirt prevention treatment container according to the present invention.

FIG. 2 is a vertical sectional view showing another embodiment of the stain prevention treatment container according to the present invention.

FIG. 3 is an enlarged view of a portion A in FIG. 3;

FIG. 4 is a process diagram showing one embodiment of a method for producing a stain prevention treatment container according to the present invention.

FIG. 5 is an enlarged view of a portion B in FIG. 4;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Container 2 Bottom wall 3 Perimeter wall 5 Inner surface 6 Coating body 8 Rubber stopper 10 Excess part 11 Wax

Continuation of the front page (56) References JP-A-64-45258 (JP, A) JP-A-58-170545 (JP, A) JP-A-4-1143 (JP, U) JP-A-4-112028 (JP) , U) Japanese Utility Model Hei 4-38942 (JP, U) Japanese Utility Model Showa 61-160041 (JP, U) Japanese Utility Model Showa 60-148221 (JP, U) (58) Fields surveyed (Int. Cl. ⁶ , DB Name) B65D 23/00-25/56

Claims (4)

(57) [Claims] 1. A container for storing a predetermined content having residual adhesion property, wherein a coating which covers the inner surface and is dissolved by a solvent which does not mix with the content is arranged in close contact with the inner surface of the container. Stain prevention treatment container. 2. The coating body is formed on an inner surface of the container.
That the coating was formed by applying a coating liquid
The stain prevention treatment container according to claim 1, wherein: 3. A method for producing a stain-resistant treatment container in which an inner surface of a container having an upper opening is coated with a peelable coating body which covers the inner surface and has a heat-solubility inside the container. A possible pressure-sensitive adhesive or adhesive is introduced in such a way that it spreads between the inner surface of the container and the coating, and then the container is heated, and a bag-like coating along the inner surface is loaded into the heated container. A method for producing a stain-prevention treatment container, comprising: bringing the coated body into close contact with the inner surface via the pressure-sensitive adhesive or the adhesive; 4. The method according to claim 3 , wherein the adhesive is wax.