JPH0223556Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a synthetic resin container body that is beautiful, has strong durability against abrasion, boiling, etc., and has a painted pattern that does not cause distortion.

Highly designed synthetic resin molded products with printed decorative patterns include synthetic resin molded products with printed patterns printed directly on the surface of the molded product,
There are synthetic resin molded products that are painted and molded using a synthetic resin film that has a preprinted pattern, but the former type of synthetic resin molded product that has a printed pattern has heat resistance There are disadvantages such as: the printing ink is easy to peel off, the printed pattern is easily scratched, and the printing ink comes into direct contact with the hands of the handler, causing hygiene problems caused by the printing ink. In addition, the latter synthetic resin molded product that has been molded with a pattern may have traces of the synthetic resin film with the printed pattern on the resulting molded product, and the synthetic resin film with the printed pattern may The film may peel off, molded products with wrinkles or air bubbles are likely to be molded, there are restrictions on the area that can be painted depending on the shape of the molded object, and there are restrictions on the position of the painting. It has drawbacks such as being difficult to stabilize.

For this reason, the first synthetic resin layer is formed by a first synthetic resin layer having a transfer printed pattern on one surface by a transfer method, and a synthetic resin of the same quality as the synthetic resin forming the first synthetic resin layer. It is also possible to create a painted synthetic resin molded product having a multilayer structure with a second synthetic resin layer laminated on the first synthetic resin layer so as to cover the transfer printed pattern on one side of the surface. However, when applying such a painted synthetic resin molded product to a synthetic resin container body having a body consisting of a bottom and a side wall rising from the bottom periphery, the formation of a second synthetic resin layer is required. is formed by injection molding on the inner container body constituting the first synthetic resin layer, the transfer printing pattern formed on the first synthetic resin layer becomes vertically streaked on the side wall of the container. In the case of an eggplant pattern, the flow pressure of the synthetic resin injected from just below the center point of the bottom of the inner container body constituting the first synthetic resin layer is applied directly to the transfer printing pattern, and the transfer printing pattern is Although it does not impair the design, it shrinks or distorts, so it cannot be applied to containers that have transfer printed patterns, such as scales for displaying the container's capacity, which require particular precision. It has its drawbacks.

The present invention, as claimed in the claims of the utility model registration, is a synthetic resin container body that has a painted pattern on the side wall that consists of a vertically streaked transfer printing pattern, which is beautiful and It is possible to provide a synthetic resin container body that is highly durable against abrasion, boiling, etc. and has a painted pattern that does not cause distortion.

The structure of the illustrated synthetic resin container body of the present invention will be explained below based on drawings and embodiments.

The illustrated synthetic resin container body, which is an embodiment of the present invention and is designated by reference numeral 1 in FIGS. 1 and 2, is composed of a bottom portion 2 and a side wall portion 3 rising from the periphery of the bottom portion 2. It consists of a container body and a barrel.

The trunk, which is the synthetic resin container main body 1, has an inner trunk that constitutes the first synthetic resin layer 4, and the outer surface 6 of the side wall is provided with a vertically streaked transfer printing pattern 7. The outer side constituting the second synthetic resin layer 5 that is laminated on the first synthetic resin layer 4 so as to cover the surface of the first synthetic resin layer 4 on which the transfer printing pattern 7 is applied. It has a multi-layer structure including the body part.

As clearly shown in FIG. 3, the first synthetic resin layer 4 constituting the inner body is located between the bottom center point 8 of the inner body made of the first synthetic resin layer 4 and the inner body. On the straight line 11 connecting the center point 10 of the line 9 where the extension line of the transfer printing pattern 7 formed on the outer surface of the side wall of the inner trunk intersects with the bottom peripheral edge of the inner trunk, A short column body 12 whose axes are perpendicular to each other is configured to protrude outward from the bottom part, and the second synthetic resin layer 5 forming the outer body part is formed on the inner body part. It is formed of a transparent or translucent synthetic resin layer made of the same synthetic resin as the synthetic resin forming the first synthetic resin layer 4, and the second synthetic resin layer 5 is , is formed by injection molding using an injection molding machine having a gate directly below the center point 8 of the bottom of the inner body where the first synthetic resin layer 4 is formed.

In the painted synthetic resin container main body 1 of the present invention, the short column body 12 protruding from the bottom of the inner body made of the first synthetic resin layer 4 has a second synthetic resin layer 5. When forming the inner shell, the flow direction of the synthetic resin injected from the gate of the injection molding machine located directly below the center point of the bottom of the inner shell is changed by the presence of the short column body 12, This is to reduce the flow pressure of the synthetic resin that is directly applied to the transfer printed pattern formed on the side wall of the section, and short columns such as cylindrical bodies and prismatic bodies as shown in the illustrated embodiment are used. Ru.

In order for the short columnar body 12 to perform the above-mentioned function and not to interfere with the formation of the second synthetic resin layer 5, the positional relationship of the short columnar body 12 as shown in FIGS. As indicated by the size and
The center point 8 of the bottom of the inner body made of the first synthetic resin layer 4 and the center point 10 of the line 9 where the transfer printed pattern 7 or its extension intersects with the bottom periphery of the inner body.
It is located on a straight line 11 connecting the straight line 11 so that the axis of the short column 12 is orthogonal to the straight line 11, and at a position closer to the bottom periphery between the bottom center point 8 and the bottom periphery, and The height (h) is approximately 20 to 90% of the thickness (t) of the second synthetic resin layer 5, and the maximum width (w)
is configured to have a size of about 5 to 300% of the width (w) of the transfer printing pattern 7.

The transfer printing pattern 7 formed on the side wall outer surface 6 of the first synthetic resin layer 4 in the illustrated synthetic resin container body 1 of the present invention forms a transfer printing pattern on the surface of the synthetic resin molded body. For example, it can be easily formed using a transfer printing paper 13 having a structure as shown in FIG. 6.

That is, the transfer printing paper 13 shown in FIG. 6 is a base sheet 1 made of, for example, thermoplastic polyester.
A colored layer 7' is formed on the surface of the removable primer layer 15 made of a mixed resin of chlorinated polypropylene and acrylic resin formed on one side of the removable primer layer 15, and the colored layer 7' is formed on the surface of the removable primer layer 15. It has a multilayer structure in which an adhesive layer 16 made of polypropylene resin is formed through the adhesive layer 7'.

The colored layer 7' in the transfer printing paper 13 is composed of a dye or pigment as a coloring component, a vehicle for the coloring component, and a kneaded composition such as a plasticizer, a dispersant, a stabilizer, a diluent, a solvent, etc. For example, if a sublimable material is used, a deep transfer printing pattern 7 can be obtained. Examples of vectors for coloring components include cellulose derivatives such as ethyl cellulose, ethyl hydroxyethyl cellulose, cellulose acetate propionate, and cellulose acetate, styrene resins and styrene copolymer resins such as polystyrene, polyα-methylstyrene, polymethyl methacrylate, and polymethacrylate. Single or copolymer resins of acrylic or methacrylic resins such as ethyl acid, polyethyl acrylate, butyl polyacrylate, rosin, rosin-modified maleic acid resin, rosin-modified phenolic resin, rosin ester resin such as polymerized rosin, polyvinyl acetate resin ,
One or a mixture of two or more of coumarone resin, vinyltoluene resin, vinyl chloride resin, polyester resin, polyurethane resin, butyral resin, polyamide resin, vinyl chloride-vinyl acetate copolymer resin, etc. is used, and in particular, a sublimable coloring component is used. Examples of the vectors include methylcellulose, ethylcellulose, carboxymethylcellulose, cellulose acetate butyrate, cellulose acetate, sodium alginate and cellulose derivatives thereof, polyvinyl alcohol, polyvinyl acetate, polycarbonate, polyester, polyamide, phenol, aminoplast, acrylic acid. , unsaturated carboxylic acids such as methacrylic acid, itaconic acid, fumaric acid, maleic acid, ester derivatives of these unsaturated carboxylic acids, nitrile derivatives or amide derivatives of the same, vinyl chloride, vinylidene chloride, vinyl acetate, styrene, vinyl Pyrrolidone, vinyl methyl ether, etc. are used.

Next, a method for molding the illustrated synthetic resin container body 1 of the present invention having the above-described structure will be explained with reference to FIG.

The illustrated synthetic resin container body 1 is made of transfer printing paper 13 having the structure shown in FIG. 6, for example.
The first synthetic resin layer 4, which is the inner body of the first synthetic resin container body, on which the outer surface 6 of the side wall is provided with the transfer printed pattern 7 obtained by using the above method, is fitted into the mold 17. Then, the mold 17 is fitted to the mold 18, and after that, the first synthetic resin layer 4 is inserted from the gate 19 of the injection molding machine located directly below the bottom center point 8 of the inner body constituting the first synthetic resin layer 4. In the gap 20 formed between the synthetic resin layer 4 and the mold 18,
A second synthetic resin layer forming the outer body is made by injecting a synthetic resin that is the same as the synthetic resin forming the first synthetic resin layer 4 and capable of forming a transparent or translucent synthetic resin layer. It forms the When obtaining the above-mentioned painted synthetic resin container body of the present invention by such a process, the first synthetic resin used in the injection molding process to form the second synthetic resin layer 5 that will become the outer body part. It is preferable to use the inner body part that will become the resin layer 4 after two days or more have passed since the end of the transfer printing process for obtaining the inner body part. This is to sufficiently volatilize the ink solvent in the transfer printing pattern 7 applied to the outer surface 6 of the side wall portion of the inner body, and to prevent shrinkage of the inner body.
If the ink solvent volatilizes insufficiently, shearing force will occur in the molding material for the second synthetic resin layer 5 during the injection process, making it impossible to form a homogeneous second synthetic resin layer 5. It is.

In addition, if the second synthetic resin layer formed on the outer surface of the inner trunk, which becomes the first synthetic resin layer 4, does not have a certain thickness, the molding material of the second synthetic resin layer will be sheared. The force is generated, and the outer surface of the first synthetic resin layer 4, which is the base, becomes rough, causing flow in the transfer printing pattern 7, which not only makes it impossible to obtain a beautiful transfer printing pattern, but also damages the injection molding operation itself. Therefore, the thickness of the second synthetic resin layer 5 is preferably 60% or more of the thickness of the first synthetic resin layer 4. However, making the second synthetic resin layer thicker than necessary compared to the first synthetic resin layer 4 not only wastes the synthetic resin used, but also makes the second synthetic resin layer thicker than necessary. In the cooling process during the injection molding process to form No. 5, shrinkage, deformation, etc. may occur due to uneven cooling, making it difficult to obtain a homogeneous second synthetic resin layer. .

Above, the structure of the synthetic resin container body with a picture of the present invention has been explained in the case of a synthetic resin container body consisting of a bottom part and a side wall part. As long as it has a body section consisting of a side wall section and a side wall section, it can also be applied to a section in which a flange section is formed or a section that has a narrow neck section.

The painted synthetic resin container body of the present invention has the structure as described above, and the transfer printing pattern interposed between the first synthetic resin layer and the second synthetic resin layer is Because it is applied to one surface of the synthetic resin layer by a transfer method, it is similar to the case of decoratively molded synthetic resin molded products obtained using a synthetic resin film with a preprinted pattern. There are no traces of synthetic resin film,
In addition, there is no peeling, wrinkles, bubbles, etc., and a beautiful printed pattern can be obtained.

In addition, since the transfer printing pattern of the painted synthetic resin container body of the present invention is sandwiched between the first synthetic resin layer and the second synthetic resin layer, it is possible to Unlike a printed pattern printed directly on the outside surface of a molded product, the ink of the printed pattern will not peel off or be scratched, resulting in a beautiful transferred printed pattern that is stable over a long period of time, and is heat resistant. It has excellent properties and has no hygienic problems due to printing ink, so it has excellent functions and effects as a container body for accommodating food and drinks, such as a baby bottle.

Furthermore, in the synthetic resin container body of the present invention, the second synthetic resin layer is formed by injection molding using an injection molding machine having a gate directly below the center point of the bottom of the inner body constituting the first synthetic resin layer. Connect the center point of the line where the transfer printing pattern attached to the outer surface of the side wall of the inner trunk or its extension intersects with the bottom periphery of the inner trunk and the center point of the bottom of the inner trunk. A short column whose axis is perpendicular to a straight line is provided protruding outward from the bottom of the inner body, so that the flow pressure of the synthetic resin when forming the second synthetic resin layer is transferred to the printed pattern. High-precision transfer printing with very little distortion or shrinkage of the transfer print pattern caused by the transfer print pattern directly receiving the flow pressure of the synthetic resin when forming the second synthetic resin layer. It also has the effect of being able to have a synthetic resin container body with a patterned design.

[Brief explanation of the drawing]

Fig. 1 is a plan view showing an example of the illustrated synthetic resin container body of the present invention, Fig. 2 is a sectional view taken along the - line in Fig. 1, and Fig. 3 is the synthetic resin container main body shown in Fig. 1. FIG. 4 is an enlarged sectional view of the vicinity of the short column body 12 in FIG. 2, and FIG.
The figure is an enlarged view of the transfer printing pattern 7, FIG. 6 is an enlarged sectional view showing an example of transfer printing paper, and FIG. 7 is a cross section showing the process of forming the outer body of the painted synthetic resin container body of the present invention. It is a diagram. 1: Synthetic resin container body with picture, 2: Bottom,
3: Side wall portion, 4: Inner body portion constituting the first synthetic resin layer, 5: Outer body portion constituting the second synthetic resin layer, 6: Outer surface of the side wall portion in the inner body portion, 7: Transfer printing Pattern, 12: Short column body, 19: Gate in injection molding machine.

Claims (1)

[Scope of utility model registration request] In a synthetic resin container main body having a body formed of a bottom and a side wall rising from the periphery of the bottom, the body has longitudinal stripes formed on the outer surface of the side wall by a transfer method. The inner body part forming the first synthetic resin layer on which the eggplant transfer printing pattern is applied and the synthetic resin of the same quality as the synthetic resin forming the first synthetic resin layer make the first synthetic resin It has a multilayer structure with an outer body part constituting a second synthetic resin layer laminated on the first synthetic resin layer so as to cover the transfer printed pattern surface in the layer, and the inner body part has a multilayer structure. On the bottom, a mark is placed on the straight line connecting the center point of the bottom and the center point of the line where the striped transfer printing pattern on the inner body or its extension intersects with the bottom periphery of the inner body. , a short column whose axes are directly connected to each other protrudes outward, and the outer body is formed by injection molding using an injection molding machine having a gate directly below the center point of the bottom of the inner body. A painted synthetic resin container body characterized by being composed of a transparent or translucent synthetic resin layer.