JPH11332718A - Tableware with pattern made of resin - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a tableware with a pattern made of resin having a specific gravity suitable for immersing in a washing liquid for washing, and excellent even in coloring resistance and antipollution due to foods. SOLUTION: In this tableware, an inside member 1 is primarily molded by a transparent or semitransparent resin, and a pattern 3 is printed on the outer surface of the inside member 1, and then an outside member 2 is secondarily molded by an opaque resin on the outside of the inside member 1. In this case, the inside member 1 is molded by a polypropylene material not added with a filer to have a thickness of 0.5 mm to 2.0 mm, and the outside member 2 is molded by adding 10 to 60 parts by weight of the filler printed in the positive list as a polypropylene filler to a colored polypropylene material to have a thickness of 0.5 mm to 3.5 mm, and the tableware is constituted to have the total thickness of 1.0 mm to 4.0 mm, and the specific gravity of 1.04 to 1.5.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of forming an inner member from a transparent or translucent resin material, printing a pattern on the outer surface of the inner member, and forming an outer member from an opaque resin material outside the inner member. The present invention relates to a tableware made of a resin material with a pattern, which is produced by secondary molding of a member.

[0002]

2. Description of the Related Art The prior art relating to tableware with pictures is disclosed, for example, in Japanese Patent Application Laid-Open No. 63-254016 by the present applicant.

FIGS. 1 to 3 show a process of manufacturing tableware with a picture made of polypropylene. As shown in FIG. 1, first, the inner member 1 of the tableware is first molded from a transparent polypropylene material, and a pattern 3 is printed on the outer surface thereof. And
As shown in FIG. 2, when the outer member 2 is secondarily formed of an opaque polypropylene material on the outer surface of the primary molded product, the tableware 10 in which the pattern 3 can be seen can be formed through the inner member 1 shown in FIG.

However, the tableware 10 made of polypropylene has a low specific gravity and floats on water as shown in FIG. 4, so that the tableware 10 is entirely immersed in a cleaning tank 20 containing a cleaning solution W in which a detergent is dissolved in water. The tableware 10 cannot be pre-washed. Therefore, the applicant has filed Utility Model No. 300
No. 1599 proposes an immersion tank for tableware, but it is necessary to provide a tableware 10A which sinks in the washing tank 20 at an appropriate speed as shown in FIG. 5 without requiring such a special device. Have been.

[0005] In order to solve such a problem, it is known to increase the specific gravity of a molded article by adding a filler having a large specific gravity to polypropylene. However, the addition of such a filler causes a problem that transparency is deteriorated, and a problem that coloring contamination due to food is increased occurs, thereby deteriorating the marketability of tableware.

[0006]

SUMMARY OF THE INVENTION Accordingly, the present invention is directed to a resin-made tableware having a pattern which has a specific gravity suitable for washing by immersion in a cleaning solution and is excellent in resistance to coloring contamination by food. It is intended to provide.

[0007]

According to the tableware made of resin with a picture of the present invention, the inner member is primarily formed of a transparent or translucent resin material, and a pattern is printed on the outer surface of the inner member. A tableware made of a resin material with a picture, which is produced by secondary molding an outer member with an opaque resin material on the outer side of the inner member, wherein the inner member is a polypropylene material to which no filler is added and has a thickness of 0.5 mm to 2. 0 mm, and the outer member is made of a polypropylene material as a filler for polypropylene. Weight% and molded to a wall thickness of 0.5mm to 3.5mm,
1.0mm to 4.0mm overall thickness and 1.0 specific gravity
It is configured between 4 and 1.5.

According to the present invention, the specific gravity of the whole is not less than 1.04, and it is immediately immersed in the cleaning liquid, so that it is practical. In addition, since the thickness is 4.0 mm or less, there is no occurrence that the weight is too heavy, the stackability is poor, or the consumption of the raw material is too large. There is no problem in reducing the food coloring stain resistance and the transparency due to the filler because the filler is added only to the outer member. In addition, if only submerged in water, the inner member can be made opaque and the outer member can be made transparent so that the picture can be seen from the outside.

The fillers for polypropylene listed on the positive list include oxides as
Magnesium oxide / aluminum oxide / silicon oxide / titanium oxide / chromium oxide / iron oxide / zinc oxide, hydroxides: magnesium hydroxide / aluminum hydroxide, carbonates: magnesium carbonate / calcium carbonate / zinc carbonate, sulfate As calcium sulfate and barium sulfate; as silicates, sodium silicate, magnesium silicate, aluminum silicate, calcium silicate, aluminosilicate (Na, Ca), aluminum calcium silicate,
Others (natural products) include clay, diatomaceous earth, kaolin (porcelain), talc, perlite, glass, wood flour, mica, metals, aluminum and silver, sulfides, zinc sulfide, and trade name display materials, Sanrion And itaya zeolite (Z).

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below. First, the inner member 1 is formed of a transparent polypropylene material having no filler added to a thickness of 0.5 mm to 2.0 mm as in the prior art shown in FIG. 1, and a pattern 3 is printed on the outer surface thereof. .

The outer member 2 is formed by adding a filler listed on the positive list as a filler for polypropylene to the polypropylene material in an amount of 10 to 60% by weight to a wall thickness of 0.5 to 3.5 mm (see FIG. 1). 2) The specific thickness is set to 1.0 mm to 4.0 mm and the specific gravity is set to 1.0 mm.
04 or more and 1.5 or less.

The resin-made tableware 10 thus formed
(FIG. 3) is practical because it has a specific gravity of 1.04 or more and quickly sinks into the cleaning solution, and has a thickness of 1.0 m.
m or more, there is no problem in the formability, rigidity or handleability, and since the thickness is 4.0 mm or less, there is no problem that the weight is too heavy, the stackability is poor, or the consumption of the raw material is too much. In addition, there is no problem in the reduction of food coloring stain resistance and transparency due to the addition of the filler since the filler is added only to the outer member 2.

[0013]

[Experimental example] In the resin-made tableware of the present invention, moldability, ketchup, sauce, watermelon, banana,
The food coloring resistance to curry and umeboshi and the state when put in a dipping tank were confirmed by experiments, and the results are shown in Table 1.

Table 1 Experiment numbers A1 to A5 used 100% polypropylene for the inner member 1 and 55% polypropylene for the outer member 2.
The talc in A1 as a filler, the A2 zeolite, the A3 glass, molded by A4 in iron oxide, A5 in the barium sulfate BaSO ₄ was added 45% respectively, and the experiment.

The evaluation of the results was as follows.
Very good, Good, Poor, Poor or Poor
The coloring property of the raw material itself is as follows:
× Indicates that coloring is restricted, and food coloring resistance is ○
Not colored, slightly colored, x colored.

Next, Table 2 shows the results of experiments conducted using the addition ratio of the filler as a variable.

Table 2 In experiment numbers B1 to B7, 100% polypropylene was used for the inner member 1, polypropylene was used for the outer member 2, barium sulfate BaSO ₄ was used as a filler, and B1 was 15%.
25% for B2, 30% for B3, 35% for B4, B
The experiment was performed by adding 40% for B5, 45% for B6, and 50% for B7. The result is
It is shown by the same evaluation method as described above.

According to the above experimental example, the overall specific gravity is 1.04
Below, it sinks slowly and is not practical. When the wall thickness is 4 mm or more, it is heavy, the stackability is poor, and it is not practical.
When the thickness is 0 mm or less, the results show that the moldability, rigidity, and handleability are affected.

From the test numbers A1 to A5, the outer member was made of 55% of polypropylene and the filler was made of 45%.
% Of talc, zeolite, glass, iron oxide, barium sulfate BaSO ₄ , there is almost no difference in moldability, appearance and food coloring resistance depending on the variables of the filler.
Further, from Experiment No. B1 to B7, Increasing the addition ratio of the filler (barium sulfate BaSO _4), moldability, appearance is deteriorated, there is a practical if the addition amount ratio 10% to 60%. And 100% of the inner member has food coloring stain resistance.
It can be said that no change occurs when using polypropylene.

[0020]

The present invention is constructed as described above, is practically submerged immediately in a cleaning liquid, has no problem in moldability, rigidity or handling, and is too heavy.
There is no problem such as poor stackability or excessive consumption of raw materials, and the reduction of food coloring stain resistance and transparency due to the addition of fillers is a problem because the filler is added only to the outer member. No effect.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing a state in which an inner member is molded by primary molding.

FIG. 2 is a sectional view showing a state in which an outer member is formed by secondary molding on the primary molded article of FIG. 1;

FIG. 3 is a side view showing the outer shape of the formed tableware.

FIG. 4 is a diagram illustrating a state in which tableware having a low specific gravity is placed in an immersion tank.

FIG. 5 is a diagram illustrating a state in which the tableware of the present invention is placed in an immersion tank.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Inside member 2 ... Outside member 3 ... Picture 10, 10A ... Tableware 20 ... Cleaning tank

Claims (1)

[Claims] An inner member is primarily formed of a transparent or translucent resin material, a pattern is printed on an outer surface of the inner member, and an outer member is formed of an opaque resin material on the outer side of the inner member. A tableware made of a resin material with a pattern, wherein the inner member is made of a polypropylene material to which no filler is added and has a thickness of 0.1 mm.
The outer member is molded to a thickness of 0.5 to 3.5 mm by adding 10 to 60% by weight of a filler listed on the positive list as a filler for polypropylene to a polypropylene material. And
1.0mm to 4.0mm overall thickness and 1.0 specific gravity
A tableware made of a resin material with a picture, wherein the tableware is constituted in a range of 4 or more and 1.5 or less.