JPS59419B2 - Transferred polyethylene terephthalate resin bottle and method for molding the bottle surface - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a polyethylene terephthalate resin-made polyethylene terephthalate resin that has undergone transfer and a method for molding the surface of the bottle.
More specifically, while the surface portion to which the transfer is applied remains transparent, the other surface portions are made translucent and cloudy to make the transferred characters or patterns stand out. The purpose is to enhance the design effect of.

Another object is to achieve clouding of other surface portions at the same time as the transfer to a predetermined surface portion, and to form the bottle surface easily and in a short time. Polyethylene terephthalate resin has excellent properties in terms of mechanical strength, content resistance, non-pollution, transparency, etc., and its range of use is rapidly expanding. Particularly, the polyethylene terephthalate resin resin has a beautiful and clean appearance due to its excellent transparency, and the range of uses of the transparent resin has been expanded.

By the way, it has been generally accepted that transparent objects inevitably have a visually cold appearance, but it is possible to eliminate this cold appearance even slightly, as seen in all glass products. Measures are taken to make the surface translucent and cloudy.

Furthermore, when letters or patterns are drawn on the surface of a transparent bottle, the letters or patterns become difficult to see and a sufficient decorative effect cannot be obtained. For this reason, there is a strong demand for making all or part of the bottle surface translucent and cloudy in order to eliminate the cold feel of the bottle and enhance the decorative effect of the letters and patterns drawn on the surface.

However, it is extremely difficult to make the surface of a transparent paper cloudy by printing or transfer, and even if it were possible, it would not only require troublesome operations;
Even if the surface is made cloudy by printing or transfer, it will easily peel off when it comes into contact with other objects, which could even harm the appearance of the product, so conventionally polyethylene terephthalate resin bottles were used. There was no attempt to make the surface of the body translucent or cloudy.

The present invention was devised to solve the above-mentioned conventional dissatisfaction, and is constructed by making the surface area other than the surface area where the transferred characters and pattern are located cloudy. An embodiment of the present invention will be described below with reference to the drawings.

(See FIG. 4 below) The bottle 1 according to the present invention is a transparent bottle made of polyethylene terephthalate resin, and the outer circumferential surface 2 of the body has a linear cylindrical shape (in the illustrated embodiment, a cylindrical shape). A transfer film 5b depicting desired characters or patterns is welded to a circumferentially belt-shaped transparent portion 2a in a desired height range, and the outer circumferential surface portion 2b other than this portion 2a is made translucent and cloudy. It has a unique structure.

That is, almost the entire area of the body outer peripheral surface 2 of the bottle 1 according to the present invention is made translucent and cloudy, and within this cloudy surface area, characters or patterns of a desired color are printed in a state surrounded by the cloudy surface. The transparent parts drawn are located in the composition.

In this way, almost the entire area of the outer circumferential surface 2 of the body of the bottle 1 is a cloudy part, so it has a soft appearance without the coldness of a transparent object.

In addition, since the transparent part 2a where the letters and drawings are located is surrounded by the cloudy part 2b, the contrast between the cloudy part 2b and the transparent part 2a makes the part 2
The letters and patterns located at a are observed in a raised manner, and the entire bottle 1 is surrounded by a translucent cloudy part 2b, giving it a sense of depth. As described above, the bottle 1 according to the present invention has an excellent appearance that does not have the coldness of a transparent object, and has a deep overall appearance with the drawn letters and patterns standing out. The simplest and most reliable method of forming this bottle 1 will be explained with reference to FIGS. 1 to 3.

In the figure, reference numeral 3 denotes a heating body for transfer, and in the illustrated embodiment, it is in the shape of a roller, and at least its surface portion is molded from a heat-resistant elastic material such as silicone rubber.

This heating body 3 has a length slightly larger than the length of the body of the bottle 1, and when its surface 4 is pressed against the body of the bottle 1, it heats the entire length of the body of the bottle 1. It is becoming possible to do this.

The transfer film 5 is inserted between the heating element 3 and the outer circumferential surface 2 of the body while moving the bottle 1 relatively rotationally while pressing the outer circumferential surface 2 of the body against the heating element 3 to perform the transfer. However, the width of the transfer film 5 used in the present invention is much smaller than the length of the body of the bottle 1, and therefore most of the surface 4 of the heating element 3 is pressed directly against the outer peripheral surface 2 of the body. It will be done.

The transfer film 5 has almost the same structure as conventional transfer films, and has a structure in which a transfer film 5b depicting letters or patterns is laminated on a base sheet 5a.

The base sheet 5a is made of a material that has a certain degree of heat insulating effect, allowing the heat from the heating element 3 to pass through to the extent that the transfer film 5b is welded to the outer circumferential surface 2 of the body, but blocking more heat than necessary. Molded.

Moreover, the surface 4 of the heating body 3 described above is heated to 3°C from 100°C.
The surface 4 of the heating body 3 is directly opposed to the surface 4 of the heating body 3 and is heated to a temperature in the range of up to 00°C.
The two parts of the outer peripheral surface of the body that are in direct contact with each other are heated from 100 [℃] to 3
It is set to be able to rapidly heat up to a temperature range of up to 0.00°C. Now, as shown in FIG.
While pressing the bottle 1 against the heating element 3 with the transfer film 5 inserted between the bottle 1 and the heating element 3, The transfer film 5b is transferred onto the outer circumferential surface 2 of the body by rotating and moving without mutually slipping. During this transfer operation, the heating body 3
At the same time as the transfer film 5b is welded to the outer circumferential surface 2 of the body by the heat of Since the heating element 3 is pressed with a desired force against the transfer film 5, the surface part of the heating element 3 where the transfer film 5 is located is depressed and elastically deformed, so that the surface part of the heating element 3 that does not face the transfer film 5 is
As shown in the figure, it directly contacts the outer circumferential surface 2 of the body of the bottle 1.
For this reason, the outer circumferential surface 2 of the trunk portion where the transfer film 5 is located facing
The portion 2a is not rapidly heated to more than 100 degrees Celsius due to the heat insulating effect of the base sheet 5a instead of being welded to the transfer film 5b, whereas the surface 4 of the heating element 3 is in direct contact with the portion 2a. Part 2b is 100 [°C] to 300 [°C]
It will be rapidly heated to a temperature range of up to

By the way, as is well known, polyethylene terephthalate resin has a physical property that it becomes cloudy when slowly cooled in a temperature range of 100 [°C] or higher, especially around 140 [°C]. Therefore, from 100 [℃] to 300
If the portion 2b that has been rapidly heated to a temperature in the range of [°C] is allowed to cool slowly by leaving it in the air, that is, if the bottle 1 is slowly cooled after the transfer operation, the portion 2b will become translucent and cloudy; Due to the heat insulating effect of the sheet 5a, the portion 2a onto which the characters and drawings are transferred, which was not heated above 100°C, remains transparent without becoming cloudy.

In addition, in the above explanation, the case where the surface portion of the heating body 3 is molded from a heat-resistant elastic material such as silicone rubber has been explained, but it is also possible to use a heat-resistant elastic material such as silicone rubber for the heating body 3. It does not have to be the same, and may be a steel body whose surface is treated with Teflon or the like. In this case, strictly speaking, a slight gap will be formed between the portion 2b and the surface 4 of the heating element 3, but the transfer film 5 is extremely thin and the heating element 3 and the bottle 1 are At the same time, since the bottle 1 itself has a certain degree of elasticity, the portion 2b and the surface 4 are almost in contact with each other. can be rapidly heated to a predetermined temperature in the range from 100 [°C] to 300 [0C].

As described above, the method for molding the bottle surface according to the present invention can achieve translucent white cloudy molding of the portion 2b at the same time as desired character or pattern transfer, so the molding operation is extremely simple, and the conventional method of transfer This can be done by making slight modifications to the equipment. In addition, the surface of the transparent body can be easily molded to form a cloudy surface, which has been extremely difficult in the past, and can be molded evenly without any unevenness in quality.

Furthermore, by changing the shape of the transfer film 5, it is possible to freely form an interesting white cloudy pattern in addition to the transferred characters and patterns, and it is possible to change the appearance of the bottle 1. .

As is clear from the above description, the present invention can effectively bring out the transferred characters and designs, make the overall appearance deep and free of coldness, and can also make the surface of the body look cloudy. can be easily performed at the same time as the transfer operation, and the cloudy molding state is uniform and even.There are many excellent effects on the appearance of the highly transparent polyethylene terephthalate resin bottle and on the surface molding of this bottle. It has the following.

[Brief explanation of drawings]

FIG. 1 is an overall perspective view showing the mutual positional relationship of a bottle, a heating element, and a transfer film in which the method of the present invention is carried out;
The figure is an enlarged longitudinal sectional view of the main part showing the state of the pressure contact between the bottle and the heating element with the transfer film in between, cut along a plane including the axis of the heating element, and Figure 3 shows the axis of the heating element. FIG. 4 is an enlarged view of the main part of the bottle cut along a plane perpendicular to the center and shows the transfer state of the transfer film onto the bottle, and FIG. 4 is a perspective view of the appearance of the bottle of the present invention. Explanation of symbols, 1: Bottle body, 2: Body outer peripheral surface, 2a, 2b:
Part, 3: Heating body, 4: Surface, 5: Transfer film, 5a
: Base sheet: 5b transfer film.

Claims (1)

[Scope of Claims] 1. Forming a circumferential band-shaped transparent portion 2a on which a transfer film 5b is welded at a desired location on the outer circumferential surface 2 of the straight cylinder-shaped body of the polyethylene terephthalate resin bottle 1;
A bottle made of polyethylene terephthalate resin, which has been transferred to make the remaining part 2b of the outer circumferential surface 2 other than the transparent part 2a translucent and cloudy. 2. On the surface 4 of the heating body 3, which is longer than the body of the bottle 1, there is a transfer film in the form of an elongated strip, in which a transfer film 5b is laminated on a base sheet 5a made of a material that has a certain degree of heat insulation effect in desired areas. With the film 5 interposed, the outer circumferential surface 2 of the body part of the bottle 1 is pressed and rotated relatively without slipping to transfer the transfer film 5b, and the remaining portion 2b of the outer circumferential surface 2 that does not face the transfer film 5. from 100 [℃] to 300 [℃]
] A method for molding the surface of a polyethylene terephthalate resin bottle by rapidly heating it to a temperature within a range of 100 to 1000 ml, and then slowly cooling the remaining portion 2b to form a cloudy image. 3. A method for molding the surface of a polyethylene terephthalate resin bottle with transfer as set forth in claim 2, wherein at least four parts of the surface of the heating body 3 are molded with a heat-resistant elastic material such as silicone rubber to a desired thickness.