JPH036480Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) This invention relates to a water-based paint can with a lid made of polypropylene, and its purpose is to mold at least the lid of the paint can from plastic, especially polypropylene resin, Made of polypropylene, with paint or a printed sheet of exactly the same color as the paint inside the paint can attached to the center, the color tone of the paint inside can be seen at a glance from the outside of the paint can, and with appropriate flexibility and durability. To provide a water-based paint can with a lid.

(Prior art and its problems) In the past, paint cans were usually made of metal material whose surface had been subjected to a required plating treatment such as tin plating, but paint cans were often made of metal materials that had been subjected to a required plating treatment such as tin plating. This often caused the paint on the inner and outer walls to rust.

This rust, especially the rust on the outer wall, has the disadvantage of deteriorating the strength of the can and making it look bad.Also, if the rust on the inner wall mixes with the paint components inside the paint can, it may cause a change in color or cause the can to deteriorate due to corrosion. This has often had undesirable effects such as deterioration of the mechanical strength of the steel.

In particular, since metal lids are frequently opened and closed, the lids are deformed or physically damaged by this opening and closing, and the damaged portions are prone to rust, making the above-mentioned drawbacks conspicuous.

Therefore, in order to prevent metal lids from rusting, there is an idea of using plastic cans (especially the lids) instead of metal materials (especially polypropylene).In Western countries, plastic cans (lids and However, in the case of these plastic paint cans, it is necessary to use a laminate material that has different resin properties on the inside that comes into direct contact with the paint and on the outside that requires printing. The type of resin to be laminated must be changed depending on the intended use, components, and solvent used in the coating, which inevitably increases the number of manufacturing steps and has the disadvantage of being complicated.

Furthermore, conventional plastic paint cans have a problem in their durability, and there is a risk that they may be deformed or the lid may open due to impact or the like, causing the paint contained therein to flow out.

Especially in Japan, it is extremely rare to consume all the paint in a can at once like in other countries, and it is common to use only a small amount of paint at a time and store the paint in the can for a long time. Therefore, conventional plastic paint cans have not been put into practical use as household paint cans, which require frequent opening and closing of the lid.

Furthermore, it is extremely difficult to apply markings to the outer surface of conventional plastic paint cans, and if a separately printed printing sheet is attached to other parts using adhesive, such as shrink printing or stretch printing, it may slip off. In order to avoid this problem, the printing sheet was wrapped around the outer surface of the can and the edges were pasted together to display the label. It was impossible to completely eliminate it.

In addition, the printing characteristics of the outer surface of plastic paint cans are very poor, making it impossible to apply paint directly to the outer surface.If printing directly on the outer surface, corona discharge treatment or flame treatment is required to improve the surface quality. The paint had to be printed after being prepared, which required extremely complicated processing, and the printing process had the disadvantage that the color tone was slightly different from that of the paint contained in the can. .

It is not necessary to display the color tone, purpose of use, method of use, etc. of the paint to general purchasers on the lid of the paint can or on the outer surface of the can. If the paint is different, the color tone will be different from what the buyer expected when the paint is applied.
Purchasers were sometimes confused, and conventional plastic paint cans with extremely poor printing properties were completely unpractical.

However, compared to metal cans, plastic cans are lighter, and even if only the lid is made of plastic, there is no problem of damage or rust, and this prevents deterioration over time such as color changes in paint components. be able to.

In view of the above-mentioned circumstances, in the industry, at least the lids of paint cans are molded from plastic, especially polypropylene resin, and the center of the lid is coated with paint or a printed sheet of exactly the same color as the paint contained in the paint can. It has been desired to create a water-based paint can with a lid made of polypropylene, which allows the color tone of the filled paint to be seen at a glance from the outside of the paint can, and which has appropriate flexibility and durability.

(Means for Solving the Problems) This invention was made in order to overcome the drawbacks of the conventional metal lids as described above.In other words, this invention is designed to solve the above-mentioned drawbacks of the conventional metal lids. The lid is molded from one or more resins selected from copolymer resins, etc., and a hanging cylinder is provided on the fitting surface of the lid, and a plurality of reinforcing ribs are provided at regular intervals on the inner circumference of this hanging cylinder. A recess is formed in the center of the lid, which is concentric with the outer circumference of the lid, and the bottom of this recess is coated with paint of exactly the same color as the internal paint. Alternatively, sheets printed with exactly the same color are attached using adhesive, and the paint vehicle applied to the lid or the adhesive vehicle for adhering the sheets is prepared mainly from chlorinated polyolefin resin. By providing a water-based paint can with a lid made of polypropylene, the weight of the entire paint can can be reduced, the color of the paint inside can be determined just by looking at the lid, and at least the lid has appropriate flexibility and We have completed a water-based paint can with a polypropylene lid that is durable.

(Example) Hereinafter, an example of a water-based paint can having a lid made of polypropylene according to the present invention will be described based on the drawings.

In the figure, 1 is the main body of a water-based paint can with a lid made of polypropylene, 2 is a handle, and 3 is a lid.

The lid 3 of this water-based paint can with a lid made of polypropylene is molded using one or more selected from polypropylene, modified polypropylene resin, or polypropylene resin such as a copolymer resin of polypropylene and other resins. ing.

In this invention, the reason why the resin for the lid 3 of a water-based paint can with a lid made of polypropylene is limited to the above-mentioned resin is that it was selected because of the properties of polypropylene resin, namely, its solvent resistance properties and its versatility.

The handle 2 and the main body 1 are made of the same resin or metal plate as the lid 3, and the handle 2 has the main body 1 and the protrusions 4, 4.
They are engaged via a and 4b.

As shown in the first figure, the lid 3 is provided with a hanging cylinder 3a on the fitting contact surface with the main body 1, and a plurality of reinforcing ribs 3b are arranged at regular intervals on the inner circumference of the hanging cylinder 3a. As shown in the second figure, a concave portion 3c with a small diameter and concentric with the outer circumference of the lid 3 is provided in the center of the surface as shown in the second figure.

By forming the lid 3 into the above-described shape and fitting the lid 3 as shown in the third figure, the disadvantages of conventional plastic lids, namely deformation caused by frequent opening and closing of the lid, can be prevented and shocks etc. can be prevented. This prevents the lid from opening and the paint contained inside from flowing out.

Until now, no paints or adhesives that can be applied to polypropylene plastic products have been devised, and it is therefore extremely difficult to directly print the intended purpose on the outer surface of a paint can. Although it was impossible to attach sheets of exactly the same color or to directly apply paint of the same color as the paint, these inventors used a chlorinated polyolefin resin that they had already developed. By using a vehicle consisting of a mixture mainly consisting of as an adhesive vehicle or a paint vehicle, paint of exactly the same color as the paint filled in the bottom surface 3d of the recess 3c of the lid 3 can be applied or the same color can be displayed. It made it possible to glue printed sheets together.

This chlorinated polyolefin resin has an average molecular weight of at least 5,000 to 50,000 and a chlorine content.
Any polyolefin resin containing 25 to 50% by weight may be used, and such a chlorinated polyolefin resin is mixed with an acrylic resin, an alkyd resin, or a petroleum resin to form the vehicle.

By using such a vehicle as a printing ink vehicle, in the bottom surface 3d of the recess 3c of the lid 3 of the water-based paint can with the polypropylene lid,
Furthermore, if the main body 1 is made of polypropylene, it is also possible to print directly on its outer surface.

However, in this invention, at least the bottom surface 3d of the concave portion 3c in the center of the lid 3 is clearly painted in exactly the same color as the paint using the specific vehicle or the paint filled with adhesive.

(Effects of the invention) As detailed above, the water-based paint can with a lid made of polypropylene according to this invention has at least a lid made of polypropylene or one type of resin such as a modified polypropylene resin or a copolymer resin of polypropylene and other resins. The lid is molded from the resin selected above, and a hanging cylinder is provided on the fitting surface of the lid, and a plurality of reinforcing ribs are provided on the inner periphery of the hanging cylinder at regular intervals over the entire circumference. A recessed part concentric with the outer circumference of the lid is formed in the center of the recessed part, and the bottom of this recessed part is coated with paint that is exactly the same color as the internal paint, or is printed with the same color as the paint. A water-based paint having a lid made of polypropylene, characterized in that the sheet is attached using an adhesive, and the paint vehicle applied to the lid or the adhesive vehicle for the sheet adhesive is mainly made of chlorinated polyolefin resin. Since it is a can, it has the following effects.

At least the lid is molded from one or more resins selected from polypropylene, modified polypropylene resin, or copolymer resin of polypropylene and other resins, so unlike conventional metal lids, it will not rust due to dirt or damage. Therefore, this rust does not mix with the paint components inside the paint can and cause a change in color or deteriorate the mechanical strength of the can due to corrosion, and even if it gets dirty, it can be wiped off and the lid can be opened and closed frequently. Since the cover does not deform and is more flexible than a metal cover, it is extremely easy to fit or disengage when opening and closing the cover, and the weight can be reduced.

In addition, a hanging cylinder is provided on the fitting surface of the lid, a plurality of reinforcing ribs are provided on the inner periphery of the hanging cylinder at regular intervals, and the outer periphery of the lid is provided in the center of the lid. It is durable because it has a concentric concave part, which prevents deformation caused by opening and closing the lid, and also prevents the paint inside from flowing out if the lid opens due to impact etc. can do.

Furthermore, a paint with the exact same color as the filler paint is applied to the bottom of the concave part of the lid, or a sheet printed with the same color as the paint is pasted using adhesive, and the lid is Since the paint vehicle to be applied or the adhesive vehicle for the sheet adhesive is mainly made of chlorinated polyolefin resin, the printing properties are good and the paint can be applied directly or the printed sheet can be adhered without shifting or peeling. It is possible,
Therefore, the printing process can be easily performed, and the purchaser can accurately select a paint having exactly the same color tone as desired.

[Brief explanation of drawings]

Figure 1 is an explanatory diagram of the appearance of the main body and lid of a water-based paint can with a polypropylene lid according to this invention;
The figure is a plan view of a water-based paint can with a polypropylene lid according to this invention when the lid is fitted to the main body, and FIG. 3 is a sectional view taken along the line A--A in FIG. 2. 1...Main body, 3...Lid, 3a...Descent tube, 3b
... Reinforcement rib, 3c ... Recess, 3d ... Bottom surface of the recess of the lid.

Claims (1)

[Scope of utility model registration request] At least the lid is molded from one or more resins selected from polypropylene, modified polypropylene resin, or copolymer resin of polypropylene and other resins, and a hanging cylinder is provided on the fitting abutment surface of the lid, A plurality of reinforcing ribs are provided on the inner periphery of this hanging cylinder at regular intervals all around the circumference,
A recessed part concentric with the outer periphery of the lid is formed in the center of the lid, and the bottom of this recessed part is coated with paint of the exact same color as the internal paint, or a sheet printed with the exact same color. A water-based paint can having a lid made of polypropylene, which is attached using an adhesive, and the paint vehicle applied to the lid or the adhesive vehicle for bonding sheets is mainly made of chlorinated polyolefin resin.