JPS6145530B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for producing a stretch blow-molded container using a polyester resin to impart heat resistance and at the same time to be decorated by thermal transfer.

Stretched blow-molded containers made of polyester resin are lightweight and have excellent transparency, barrier properties, toughness, impact resistance, surface photoselectivity, and beauty, so they have come to be used as an alternative to vinyl chloride and glass containers. I came. However, stretch blow molded containers made of polyester resin have the disadvantage of thermal shrinkage at temperatures above 60°C. For this reason, not only can it not be used as a container for hot filling, such as containers for sauces, vinegar, sake, etc., but even when used as a container for non-heat filling, it will shrink due to heat if placed in a high temperature environment. It has the disadvantage of being easily deformed. In addition, when these are used as containers, containers formed by attaching a separately printed label or by silk screen printing, gravure printing, flexo printing, etc. for the purpose of providing information on the contents and enhancing the image of the product. The method used is to print directly on the
The reality is that these steps are usually carried out separately after stretch blow molding.

Heat treatment and thermal transfer of molded articles made of polyester resin are performed on linear (one-dimensional) fibers, planar (two-dimensional) sheets, films, cloth, and the like. However, applying heat treatment to a stretch blow-molded container made of polyester resin or painting it by heat transfer requires processing in a short time while preserving the product shape because the shape is a three-dimensional structure. It is extremely difficult. That is, when the amount of heat required for heat treatment or thermal transfer is applied and the container is heated to a high temperature, the stretched resin wall softens and contracts due to heat shrinkage stress. Requires. Furthermore, when performing thermal transfer, it is necessary to bring the transfer sheet and resin wall into close contact with each other. It is necessary to prevent the molded container, which is the object to be transferred, from being deformed.

The present invention eliminates such difficulties and is characterized by rapid heat treatment and at the same time, thermal transfer painting.
In addition, it enables rapid production of polyester containers imparted with heat resistance.

The gist of the invention is to obtain a stretch blow-molded container by stretching and blow-molding a polyester resin, and then taking out the molded container from the molding die, and forming a three-dimensional shape that is the same as the shape of the molded container or a three-dimensional shape that includes this. a cooling device is provided below the region of the cavity side surface that is in contact with the unstretched portion of the molded product, and a temperature adjustment device is provided below the region of the cavity side surface other than that. mounting the molded container in a heat treatment/transfer mold, interposing a transfer sheet on which a pattern layer is formed with a disperse dye between at least a part of the circumferential surface of the container and the inner surface of the heat treatment/transfer mold; The inner wall surface of the container is pressed with pressurized gas from inside the molded container to bring the transfer sheet and the container wall surface into close contact with the cavity side surface, and while maintaining the shape, the cavity side facing the unstretched portion of the molded product is The surface area is cooled to below the crystallization temperature of the resin, while the other cavity side surface area is cooled by the temperature control device.
While maintaining the temperature at the melting point temperature of the polyester resin or lower, radiant energy is irradiated from inside the container to the inner wall surface of the container, and heat treatment is performed at a temperature higher than the glass transition point temperature of the polyester resin and lower than the melting point temperature, which is higher than the adjustment temperature. At the same time, after thermal transfer is performed on the outer surface of the extended portion of the container, the radiant energy heat source is taken out from inside the container, and the temperature of the container wall is lowered to around the adjustment temperature, and then,
The method for manufacturing a painted heat-resistant molded container is characterized in that the pressurized gas is evacuated, and then the molded container that has been heat-treated and heat-transferred is released from the mold for heat treatment and transfer.

Hereinafter, the present invention will be explained in detail with reference to the drawings.

First, a polyester resin is stretch-hollow-molded to obtain a stretch-hollow-molded container 1 as shown in the first diagram.

Then, the molded container 1 is taken out from inside the mold, and as shown in FIG. , the bottom nesting mold 5 and the mandrel 6 are closed and formed. At least a portion of the circumferential surface of the molded container and the heat-treated
A transfer sheet 19 on which a colored layer is formed using a disperse dye is placed between the inner surfaces of the transfer mold as shown in the second figure, and pressurized gas is blown into the container through the gap between the mandrel 6 and the heater 8. The inner wall surface of the container is pressed with pressurized gas to heat-treat the inner wall surface of the container, and the wall surface of the container is brought into close contact with the surface of the cavity 7 side of the transfer mold 2.

Here, the mouth nesting molds 4, 4' are in contact with the unstretched part of the molded product of the heat treatment and transfer mold 2.
A cold mold pipe 9 is provided inside the bottom nesting mold 5, and the mouth nesting molds 4, 4' and the bottom nesting mold 5 are cooled by the action of cooling water passing through this cooling pipe 9. The container wall of the molded container 1, which is in contact with the molded container 1, is cooled to a temperature below the crystallization temperature of the resin to prevent crystal spherule crystallization from occurring in the unstretched resin portion during the subsequent heat treatment.

On the other hand, the support mold 3a of the heat treatment/transfer mold 2,
A temperature regulating fluid passage 10 through which temperature regulating fluid circulates is provided at a depth as close as possible from the cavity side surface of 3b, and a temperature regulating fluid passage 10 in which a temperature regulating fluid circulates is provided within the temperature regulating fluid passage 10. By circulating the fluid, the cavity-side surfaces of the support molds 3a and 3b are constantly maintained at an optimal temperature for heat treatment and thermal transfer (hereinafter referred to as base temperature).

In addition, in Fig. 2 A and B, 21 is a heat insulating layer;
22 is a rod for driving a heater, and 23 is a tube with a built-in heater.

Figure 3 shows an enlarged view of the support type surface layer that is in close contact with the container wall via a transfer sheet, and Figure 4 is a graph conceptually showing the temperature distribution in this area. 16 is a pattern layer of the transfer sheet 19, 17 is a base sheet layer of the transfer sheet 19, 18 is a supporting surface layer, and 14 is a radiant energy layer. On the other hand, FIG. 5 shows an enlarged view of the support type surface layer portion that is closely attached to the container wall via the transfer sheet, and FIG. 6 is a graph conceptually showing the temperature distribution in this portion. At this stage, a temperature distribution as shown by the curve '' in the graphs of FIGS. 4 and 6 is obtained.

Here, the base temperature does not need to be fixed and will be described later. The temperature may be set arbitrarily depending on processing conditions such as the intensity of heating by radiation from inside the container, heat treatment, and heat transfer time, and may be at or below the melting point temperature of the resin.

Next, in this state, the heater 8 is inserted into the container.

Here, the heater 8 has the function of radiating electromagnetic waves in the absorption band of the resin forming the container 1. It is more desirable if the material also emits electromagnetic waves in the absorption band of the base sheet material and pattern layer constituting the transfer sheet.

As the heater 8 is inserted, the wall of the container 1 absorbs radiant energy from the inner wall surface and is heated, causing the temperature of the container wall to rise rapidly. At this time, as seen when a ceramic infrared heater is used as a heater, in parallel with the absorption of radiant energy, convection occurs as a result of heating the pressurized gas between the heater and the wall of the container.
It goes without saying that heat is conducted from the heated gas to the container wall. As described above, as a result of radiation of radiant energy and heat conduction from the heated air to the container wall, the temperature rises rapidly from the inner wall surface of the container.

Here, on the cavity side surface of the portion where the transfer sheets of the support molds 3a and 3b are overlapped, most of the radiant energy is absorbed by the resin portion 15 interposed between the heater 8 and the cavity side surface of the support molds 3a and 3b, and the transfer sheet 19. Since the cavity side surface is not directly heated by shielding it, the cavity side surface is free from the temperature gradient that occurs as a result of the temperature rise of the resin part 15 and the transfer sheet 19, and the heat at the contact surface between the support molds 3a and 3b and the transfer sheet 19. Due to conduction, it rises with a delay from the resin portion 15 and the transfer sheet 19. As a result, a temperature distribution as shown by the curve in the graph shown in FIG. Due to the heating effect of the conduction energy of the heated gas resulting from the absorption of the energy 14 by the pressurized gas and the cooling effect of the support mold surface 18 which faces it via the transfer sheet 19, it is heated to an average temperature T ₂ and at this temperature. Stress strain during stretch blow molding is relaxed, crystallization progresses under the stretched orientation state, and heat treatment is performed. Pattern layer 1 of transfer sheet 19 to be brought into close contact at the same time
6 and the temperature of the outer wall of the container due to the temperature rise of the resin part 15 and the absorption of radiant energy by the transfer sheet 19.
_T3 , and at this temperature the coloring agent contained in the pattern layer 16 sublimes from the transfer sheet 19 to the outer wall surface of the container of the transferred object (some of it may be accompanied by melting and evaporation.Hereinafter, in this specification, it will be simply referred to as "sublimation '' is used to include those that involve some melting or evaporation.) Transfer and thermal transfer.

In addition, the cavity side surface of the stretched portion of the supporting molds 3a and 3b where the transfer sheet is not applied is heated by a heater 8.
Since the resin part 15 interposed between the cavity-side surfaces of the support molds 3a and 3b is shielded from radiant energy and is not directly heated, the temperature gradient that occurs as a result of the temperature rise of the resin part 15 and the support mold 3
Due to heat conduction at the contact surfaces of a and 3b with the resin part 15, the rise is delayed from the inside of the container. As a result, a temperature distribution as shown by curve ' in the graph shown in FIG. Due to the cooling effect of the support type surface layer 18 facing the outside of the container wall, it is heated to an average temperature T ₂ ', stress strain is relaxed at this temperature, crystallization progresses, and under the oriented state, microcrystalization progresses, Heat treatment is performed.

On the other hand, the unstretched portion of the molded container that is in contact with the mouth nesting molds 4, 4' is cooled by cooling water passing through the cooling pipe inside the mouth nesting molds 4, 4', and the radiant energy of the heater is irradiated. Since the temperature is kept below the crystallization temperature during heat treatment and thermal transfer, crystallization by crystal spheres does not occur and therefore transparency is not lost.

On the other hand, since the unstretched part of the molding container that is in contact with the bottom nesting mold 5 is cooled by the cooling water passing through the cooling pipe inside the bottom nesting mold 5, the tip of the heater adjacent to the bottom of the heater is further coated with aluminum or the like. By providing the radiant energy reflecting plate 11, the temperature is kept below the crystallization temperature during heat treatment and thermal transfer, so that crystallization by crystal spheres does not occur, and therefore transparency is not lost. Here, in order to prevent the radiant plate 11 from being heated by heat conduction of the heater, it is preferable that the reflector plate 11 be attached to the tip of the heater using a thin support member having a small cross-sectional area.
In addition, when the heater is vertically erected, the reflector plate 11 also serves to prevent the upward convection of the heated gas generated along the heater surface from directly hitting the unstretched bottom portion of the molded container.

Next, when the heater 8 is taken out of the container 1 and heating is stopped, the temperature distribution as shown by the curves ′ in the graphs 4 and 6 is achieved due to the cooling effect of the temperature regulating fluid circulating in the temperature regulating fluid passage 10. As a result, the supporting mold cavity side surface layer 18, the transfer sheet 19, and the resin layer 15 are rapidly cooled. After the temperature of the resin part 15 drops to near the base temperature T ₀ , the pressurized gas is vented, heat treatment is performed, the transfer mold 2 is opened, and the container 1 is released. At this time, the temperature of the container at which the mold is released is lower than the temperature of the heat treatment and thermal transfer, so no deformation occurs. In the cooling process, the objects whose temperature is to be raised and lowered are the resin layer 15 itself, the transfer sheet 19, and the supporting molds 3a, 3b.
Since the heat treatment is limited to only the cavity side surface portion 18, the heat capacity of the target portion to be raised and lowered can be extremely reduced.
Thermal transfer time can be significantly shortened.

In FIG. 2, 12 is a heat insulating wall, and 13 is silicone packing to eliminate air leakage.

In the present invention described above, by blowing pressurized cooling gas into the container after stopping the radiant heating by the heater, cooling can be accelerated and the processing cycle can be shortened.

In the present invention, the difference between the base temperature T ₀ and the average temperature T ₂ of the resin layer during heat treatment is preferably 5° C. or more when polyethylene terephthalate resin is used as the crystalline plastic, for example.

As the supporting mold for the thermal and transfer mold used in the above manufacturing method of the present invention, a mold whose cavity side surface is made of a metal with good thermal conductivity, such as an aluminum alloy or a beryllium alloy, is preferable. It is optimal because it responds quickly to rises and falls. Further, the cavity side surface of the mold may be plated with chrome, silver, gold, etc. in order to reflect the radiant energy from the cavity side surface.

Further, the temperature regulating fluid passage 10 is desirably provided at a depth as close as possible from the cavity side surface of the mold in consideration of the thermal conductivity of the temperature regulating fluid to the mold cavity side surface. When the surface layer on the cavity side of the support type is made of iron alloy S50C plated with hard chrome, it is desirable that the surface layer be 20 mm or less.

Polyester resins for use in the present invention include all saturated polyesters having a crystalline structure, including polyethylene terephthalate, polybutylene terephthalate, or copolymers such as polyesters of terephthalic acid and isophthalic acid with cyclohexylene dimethanol. These resins are stretched from an amorphous state at a temperature higher than the glass transition point Tg, and in an oriented state, they are stretched at an appropriate temperature within the temperature range from the glass transition point Tg to the melting point Tm while maintaining their shape. When heat treatment is performed, stress and strain are removed, and microcrystalization progresses in the oriented and constrained state of molecules due to stretching, and the density increases without losing transparency, making it suitable for use as a container. A heat-resistant container is formed that has increased buckling strength and impact resistance and does not deform at temperatures lower than the temperature at which it was heat treated.

The transfer sheet used in the present invention includes an ink layer containing a binder and a coloring agent that can be transferred by sublimation when heated onto a support, such as gravure printing, screen printing, offset printing, flexographic printing, This is a transfer sheet formed into an arbitrary pattern using a printing method such as letterpress printing.

As a support for the transfer sheet used in the present invention, various papers, processed papers such as glassine paper and birchment paper, cellophane, films or sheets of various heat-resistant resins, or the like can be used. Lamination laminated according to the law
Film etc. can be used. Next, the colorant used in the ink for forming the pattern layer of the transfer sheet is a sublimable disperse dye such as PTY-56 (CI
Disperse Yellow 3), PTR-63 (CI Perth Red 60), PTV-53 (CI Solvent
Violet 32), PTB-77 (CI solvent
Blue 90), PTV-54 (CI Disperse Violet 56), PTO-59 (CI Solvent Orange-68), PTV-57 (CI Disperse Violet 28), PTB-60 (CI Solvent Blue 94), PTR −54 (CI Disperse Red
147) [hereinafter manufactured by Mitsubishi Chemical Industries, Ltd.]; Kayaset Red 026 (CI Solvent Violet)
31), Kayaset Blue A-2R (CI Solvent Blue 83) [manufactured by Nippon Kayaku Co., Ltd.]; Sumiblast Yellow (CI Daysverse Yellow 31), TS Blue 601 (CI Daysverse Blue 026), TS Turkis・Blue 606 (CI Disperse Blue 60) [Manufactured by Sumitomo Chemical Co., Ltd.]; Sabra Print Red 70011 (CI Disperse Red 60), Sabra Print Yellow 70000 (CI Disperse Yellow 3), Sabra Print Violet 70012 (CI Disperse Violet 1) [manufactured by Holiday]; Dispersol Red B3B (CI Disperse Red 11), Dispersor Yellow C-5G (CI Disperse Yellow 119), Dispersol Yellow A-G (CI Disperse Yellow 1), Dispersol Violet A-2R (CI Disperse Violet 1)
[Manufactured by ICI]; Mitsui PS Yellow G (CI Solvent Yellow 77), Mitsui PS Red G (C.
I. Solvent Red 146), Mitsui PS Blue 3R
(CI Solvent Blue 33), Mitsui PS Violet RC (CI Solvent Violet 31), Mitsui PS Violet RR (CI Solvent Violet 11), Mitsui PS Blue RR (CI Solvent Blue 13) [Mitsui Toatsu Chemical Co., Ltd. Transfer Yellow G (CI Disperse Yellow 3), Transfer Red N (CI Disperse Red 60) [manufactured by Atlantic Corporation], etc.: Oil-soluble dyes, such as Oil Yellow (CI Solvent Yellow) 3), Oil Yellow WP (CI Solvent Yellow)
10), Oil Yellow GS (CI Solvent Yellow 28), Oil Orange (CI Solvent Orange 1), Crampons Food Orange No. 2 (C.
I. Solvent Orange 2), Sudan Red 2R
(CI Solvent Red 4), Orazol Red 2B (CI Solvent Red 9), Organol Brilliant Blue JN (CI Solvent Red
Blue 63), etc.: Triphenylmethane basic dyes, such as Eisenmethyl Violet BB
(CI Basic Violet 1), Astrazone Fuchsin GN (CI Basic Violet 2), Eisencrystal Violet (CI
Basic Violet 3), Benzyl Violet PSC (CI Basic Violet
13), Magenta (CI Basic Violet)
14), Astrazone Blue G (CI Basic Blue 1), Astrazone Blue B (CI
Examples include Basic Blue 5), Eisen Victoria Viewer, and Blue BOH (CI Basic Blue 7).

Examples of binders used in the ink include methylcellulose, ethylcellulose, carboxymethylcellulose, cellulose acetate butyrate, cellulose acetate, sodium alginate and cellulose derivatives thereof, polyvinyl alcohol, polyvinyl acetate, polycarbonate resins,
Polyester resins, polyamide resins, phenolic resins, aminoblast resins, unsaturated carboxylic acids such as acrylic acid, methacrylic acid, itaconic acid, fumaric acid, maleic acid, and ester derivatives of these unsaturated carboxylic acids. Homopolymers of various vinyl monomers such as nitrile derivatives or acid amide derivatives, vinyl chloride, vinylidene chloride, vinyl acetate, styrene vinylpyrrolidone, vinyl methyl ether, butadiene, ethylene, propylene, or copolymers thereof. , other starch, gum arabic, gum tragacanth, gelatin, etc. can be used.

Furthermore, in order to promote thermal transfer according to the present invention, it is also possible to include an absorbent such as carbon black, which absorbs radiation energy more efficiently, in the ink to facilitate heating of the ink and promote sublimation of the disperse dye. .

Furthermore, by increasing the heat insulation properties of the transfer sheet, the container can be heat-treated at a high temperature, thereby imparting high-temperature heat resistance. Furthermore,
By setting the thermal transfer temperature to a high temperature, the speed of thermal transfer can be increased, and the selection range of disperse dyes to be used can be expanded.

The method of stacking the transfer sheet on a container and installing it in the mold cavity is as follows: (1) Either or both of the polyester container and the transfer sheet cut into an arbitrary shape are charged in advance, and the transfer sheet is transferred to the polyester container using electrostatic force. (2) A method in which a belt-shaped transfer sheet is applied to the surface of the container to be transferred and then placed into the mold cavity. (2) A belt-shaped transfer sheet is applied to the opening and closing of the mold support from a transfer sheet supply device installed adjacent to the mold cavity. Possible methods include synchronously moving discontinuously and stacking them on containers.

Next, the heater used in the present invention is one that generates an electromagnetic wave that matches the absorption spectrum of the resin part of the container, preferably of both the resin part of the container and the transfer sheet, for example, a wavelength of 1 mm.
A high-frequency heating device that generates electromagnetic waves in the microwave range from 1 m to 1 m can be applied. Furthermore, cast-in heaters and infrared heaters in which a resistor such as a nichrome wire that generates electromagnetic waves in the infrared region with a wavelength of 0.8 μm to 1 mm are built into a metal tube such as brass or stainless steel can be used. Among them, infrared lamps and quartz tube heaters whose generation peak is infrared rays with wavelengths of 1μ to 3μ, wavelengths of 3μ to 60
An infrared heater with a welded ceramic layer that emits infrared rays with long wavelengths up to μ is most suitable. When using a tungsten lamp etc. that generates electromagnetic waves in the visible light range, the resin part and transfer sheet have poor absorption of electromagnetic waves in the visible light range, so the surface of the mold should be plated with chrome, silver, gold, etc. There is a need to make the surface mirror-like and reflective to increase absorption by the resin portion and transfer sheet. However, since the radiant energy is large, it is effective to use electromagnetic waves in the visible light range.

When using a wavelength range shorter than this,
It is sufficient to select and use a radiation intensity that does not rapidly heat the irradiated surface of the resin and cause whitening. Furthermore, it is desirable to use a heater whose shape is changed depending on the shape of the container to be heat-treated so that the radiation can be applied uniformly to all the stretched inner walls of the container. For example, if the container to be heat treated is a narrow cylindrical container, it is desirable to use a rod-shaped infrared heater.

Next, the pressure of the pressurized gas is 0.5Kg/ ^cm2 to 20Kg/cm2.
^cm2 is preferred.

Next, a case will be described in which a stretched blow-molded container, which has been stretched except for the mouth portion as shown in FIG. 7A, is painted and heat treated as shown in FIG. 7B. In this case, as shown in Figure 8, the bottom nested mold 5 is provided with a heater 20 for heating the mold and a temperature regulating fluid passage 10 instead of a cooling pipe, and the bottom part is also heat treated.

Furthermore, as a temperature control device, in addition to that, there is also a device configured to insert a rod-shaped, loop-shaped, etc. cartridge heater into the mold and adjust the temperature while measuring the temperature with a thermocouple, and A device configured to circulate a thermal fluid, such as silicone oil heated to etc. can be mentioned. What is most desirable is the combined use of a heater for heating the mold and a heating fluid as shown in FIGS. 2 and 8. In addition, in Figure 8, 2
5 shows packing for airtight.

Next, the present invention will be specifically explained with reference to Examples.

Example: Using polyethylene terephthalate with an intrinsic viscosity (IV value) of 0.72, a cylindrical bottomed parison with a weight of 35 g and an average wall thickness of 25 mm was obtained by injection molding, then heated to an average temperature of 95°C, and biaxially stretched and blow-molded. The resulting cylindrical bolt with an average stretching ratio of 2 times in the circumferential direction, an average stretching ratio of 25 times in the longitudinal direction, and a volume of 1020 c.c. was subjected to heat treatment and transfer. As a transfer sheet, the base material is polyvinyl alcohol (PVA from Nippon Gosei Kagaku Co., Ltd.).
-G-05) Made of high-quality paper (50 g/m ² ) coated with 15% aqueous solution at a rate of 10 g/m ² , ink is 40% isopropyl alcohol, 40% toluene, manufactured by Hercules, Ethocel N-7 10% , Daiichi Kogyo Seiyaku Co., Ltd. Neugen EA33 2% as a dispersant, dye 8
%, each weight ratio was used. The dye is Diamond Resin Violet A (Mitsubishi Kasei), RTR-
64 (Mitsubishi Kasei), Mitsui PS Yellow G (Mitsui Toatsu)
The transfer sheet for painting on bottles using the above-mentioned base material is produced by gravure printing the above-mentioned ink on the above-mentioned base material, punching it out into an oval shape, and charging it.
After attaching it to the bottle body, it was attached to a heat treatment/transfer mold together with the bottle.

The heat treatment/transfer mold uses a nichrome wire casting heater and a fluid passage for temperature adjustment, and the internal heating heater is a rod-shaped 500W heater.
A ceramic infrared heater was used. The heat treatment conditions were such that the heat treatment base temperature was set at 130°C, the internal heater was moved to the outside of the bottle after 20 seconds of internal heating time, the pressure was held for 25 seconds, and then the bottle and transfer sheet were released at the same time.

The transfer sheet was separated from the bottle surface to obtain a bottle painted in three colors.

After this bottle was filled with hot water at 90°C, it was left on a wooden desk at room temperature, and the volumetric shrinkage rate after cooling to 55°C by natural cooling was 2% or less.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a heat-treated stretch blow-molded container, FIG. 2A is a sectional view of a heat treatment/transfer mold used in the present invention, and FIG.
FIG. 3 is a cross-sectional view of the supporting type surface layer portion in close contact with the container wall via the transfer sheet, FIG. 4 is a graph showing the temperature distribution during and before and after heat treatment/transfer, and FIG. Figure 5 is a cross-sectional view of the support type surface layer that is in close contact with the container wall without using a transfer sheet, Figure 6 is a graph showing the temperature distribution during and before and after heat treatment/transfer, and Figures 7 (a) and (b) are 8 is a cross-sectional view of a stretched blow-molded container in which all parts except the mouth are stretched, A is a cross-sectional view, B is a side view, and FIG. 8 is a cross-sectional view of another heat treatment/transfer mold. 1, 24... Stretch blow-molded container, 2... Heat treatment/transfer mold, 3a, 3b... Support mold, 4, 4'
...Mouth nested type, 5...Bottom nested type, 6...Mandrel, 7...Cavity, 8...Heater, 9
...Cooling pipe, 10...Fluid passage for temperature adjustment,
11...Reflector, 12...Insulating wall, 13...Silicon packing, 14...Radiation energy, 15
... Resin layer, 16 ... Pattern layer, 17 ... Base sheet layer, 18 ... Support mold surface, 19 ... Transfer sheet, 20 ... Heater for heating the mold, 21 ... Heat insulating material layer, 22 ... Heater drive rod, 23...
Tube with built-in heater, 25...Packing for airtight.

Claims (1)

[Scope of Claims] 1. After a polyester resin is stretch-hollow-molded to obtain a stretch-hollow-molded container, the molded container is taken out from the molding die and has the same three-dimensional shape as the molded container, or includes the same three-dimensional shape. It has a three-dimensional cavity, and a cooling device is provided at the lower part of the region of the cavity side surface that is in contact with the unstretched part of the molded product, and a temperature adjustment device is provided at the lower part of the other region of the cavity side surface. The molded container is placed in a heat treatment/transfer mold provided with a transfer sheet having a pattern layer formed with a disperse dye interposed between at least a part of the circumferential surface of the container and the inner surface of the heat treatment/transfer mold. The inner wall surface of the molded container is pressed with pressurized gas from inside the molded container to bring the transfer sheet and the wall surface of the container into close contact with the cavity side surface, and while maintaining the shape, it is applied to the unstretched portion of the molded product. The opposing cavity side surface area is cooled to a temperature below the crystallization temperature of the polyester resin, while the other cavity side surface area is maintained at a temperature below the melting point temperature of the polyester resin by a temperature control device. Radiant energy is applied from inside to the inner wall surface of the container to perform heat treatment at a temperature higher than the adjustment temperature of the fluid, which is above the glass transition point temperature and below the melting point temperature of the polyester resin. After thermal transfer, the radiation energy source is taken out from inside the container, the temperature of the container wall is lowered to around the adjustment temperature, the pressurized gas is evacuated, and then the heat treatment/transfer mold is removed. A method for producing a painted heat-resistant molded container, which comprises releasing the heat-transferred molded container from the mold at the same time as it is heat-treated. 2. The painted heat-resistant device according to claim 1, wherein a device is used as the temperature regulating device, in which a temperature regulating fluid passage through which a temperature regulating fluid circulates is provided in a lower region of the cavity side surface. Method for manufacturing a molded container. 3. The method for producing a painted heat-resistant molded container according to claim 1, wherein a device having a temperature regulating heater built into the lower part of the cavity side surface area is used as the temperature regulating device. 4. Claims 1, 2, or 3, wherein a rod-shaped heater is used as the radiant energy source, and a reflective plate for transferred energy is provided at the tip of the heater facing the bottom of the container. A method for manufacturing the illustrated heat-resistant molded container. 5. The method for manufacturing a painted heat-resistant molded container according to claim 1, 2, or 3, wherein the stretched blow-molded container is entirely stretched except for the container mouth. 6 Claim 1 in which polyethylene terephthalate resin is used as the polyester resin
A method for producing a painted heat-resistant molded container according to item 1, 2, 3, or 4.