JPH1045101A - Heat filling system and PET bottle used for heat filling - Google Patents

Abstract

(57) [Summary] [Object] In a heating and filling system, it prevents dust and various bacteria from adhering due to the passage of time from the molding of a PET bottle to the heating and filling, and the durability due to moisture absorption and the trouble at the time of filling are eliminated. SOLUTION: An in-line blow molding device 1 is provided immediately before an automatic filling device 5 so that a blow-molded PET bottle is immediately supplied to the automatic filling device 5 to be left in the air for a long time in the state of an empty PET bottle. Prevent exposure.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a method of filling oolong tea, fruit juice, mineral water, etc. in a plastic bottle at a high temperature (for example, 88.degree. The present invention relates to a so-called heat filling system (hot pack system) for sterilizing and a PET bottle used for the heat filling.

[0002]

2. Description of the Related Art In the case of a conventional heating and filling system, PET bottles produced in another factory are transported to a filling factory by a truck or the like, where they are temporarily stored, and then stored in a heating and filling system for filling. The method of filling is used.

[0003]

As described above, in the case of the conventional heating and filling system, since the molding of the PET bottle and the filling place are separated, the following problems occur. a. Due to the long storage and transportation time, there are many opportunities for dust and germs to adhere. b. Since the storage and transportation time is long, the heat resistance of the PET bottle is reduced due to moisture absorption, the PET bottle is deformed in the heating and filling step, and a trouble that the filling liquid leaks easily occurs. c. Storage and transportation costs are incurred. d. The neck of the bottle may be deformed due to the heat of the filling liquid during the sterilization by turning over.

[0004]

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems a to d, and the constitution is as follows. 1. A heating and filling system configured to perform blow molding of a PET bottle, hot-packing of the molded PET bottle with a high-temperature liquid, and sterilization of the mouth of the PET bottle and the cap by lying down after the hot pack in an inline manner. 2. A preform reheating machine, a blow molding machine for molding a PET bottle using the reheated preform, an automatic filling machine for filling a high-temperature liquid in the blow molded PET bottle, A heating and filling system comprising: a capper for placing a cap on a PET bottle; and a side-down heat sterilizer for thermally sterilizing the mouth of the PET bottle and the inside of the cap by turning the PET bottle sideways.

[0005] 3. The heating and filling system according to the above item 2, wherein the PET bottle is molded using a cold parison type blow molding machine. 4. 4. The heat filling system according to the above item 2 or 3, wherein an automatic filling machine of a heat sterilization type hot fill system is used. 5. A PET bottle used for heating and filling, in which a thick neck is attached to the mouth of the PET bottle and an inner seal material is attached in a cap.

[0006]

The parison used for blow molding includes a so-called cold parison (pr) manufactured by an injection molding machine in advance.
eformed parison) is used. The parison is reheated using a heating machine, and immediately thereafter, supplied to a blow molding machine where it is finished into a predetermined molded product (pet bottle). The PET bottle is immediately supplied to an automatic filling machine, where the object to be filled in a heated state at 80 ° C to 95 ° C is filled.

[0007] The PET bottle which has been filled is sealed with a cap by a capper, and then the PET bottle is turned over by a side-down sterilizer, and the mouth of the PET bottle and the inner surface of the cap are sterilized. The sterilized PET bottle is shipped via, for example, a labeler, a case former, a caser, and the like.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Polyethylene terephthalate or the like is selected as a pellet, and a parison having a predetermined thickness and size is formed by an injection molding machine using the pellet.
The so-called cold parison molded in this manner is heated to a plasticizing temperature by a parison heater, and then molded into a PET bottle of a predetermined shape by a blow method. The heater and blow molding machine used here are known.

[0009] The blow-molded PET bottle is supplied to an automatic filling machine via a bottle accumulator, where products such as oolong tea, fruit juice, coffee, and mineral water are filled (hot-packed). The cap is attached by the capper. Known bottle accumulators, automatic filling machines, and cappers used here are used. The hot-packed PET bottle sent from the capper is shipped via, for example, a labeler, case former, caser, and the like.

[0010]

FIG. 1 is a flow chart of a heating and filling system according to the present invention. 1 is a blow molding apparatus for molding a heat-resistant bottle using a cold parison,
This apparatus 1 comprises a preform (parison) reheater 2 and a blow molding machine 3. As the parison used here, a parison previously formed by a parison molding machine 01 is used, or a parison 04 is formed from a pellet 03 at a heating and filling factory (02) and supplied directly to the blow molding apparatus 1. I do. The blow molding apparatus 1 molds a heat-resistant bottle, for example, a so-called heat-resistant plastic bottle using polyethylene terephthalate by a known means.

Reference numeral 4 denotes a bottle accumulator, and reference numeral 5 denotes an automatic filling device. The PET bottle supplied through the bottle accumulator 4 is heated and automatically filled with a product via a rinser 6, a filler 7, and a capper 8. As shown in FIG. 2, the neck 9 of the plastic bottle used here is formed to be thick and covered with a cap 10 with an inner seal material 11.

Reference numeral 12 denotes a palletizing device, and the filled PET bottle which has exited the automatic filling device 5 is turned over by the palletizing device 12. The tip (neck 9) of the PET bottle and the inside of the cap 10 are sterilized by turning the high-temperature filling material by the overturn. The plastic bottle that has left the palletizing device 12 is shipped via a labeler, a case former, a caser, and the like.

In the above-mentioned heating and filling system, the PET bottle blow molding device 1 is incorporated immediately before the automatic filling device 5 and the PET bottle immediately after molding is immediately filled with the hot filling material. The time required to reach the automatic filling device 5 via the accumulating device 4 is about several tens of seconds.

As a result, the time of exposure to the atmosphere and moisture absorption is extremely reduced. Therefore, there is no trouble due to moisture absorption. FIG. 3 shows a change in the amount of moisture absorption over time of a PET bottle made of polyethylene terephthalate. In a normal case, the PET bottle after molding is temporarily stored, transported, temporarily stored in a filling factory, and then used. To be
It has been exposed to the atmosphere for about 1 to 2.5 months after molding.
For this reason, the amount of absorbed moisture is particularly large in a high humidity season. FIG. 3 is a graph showing the change over time of moisture absorption.
There is 0 ppm and moisture absorption of 2250 ppm in 3 months, which causes durability and troubles during automatic filling. on the other hand,
In the case of the plastic bottle of the present invention that is exposed to the atmosphere for only several tens of seconds, there is no moisture absorption.

[0015]

As described above, the present invention has the following effects by having the blow molding device for PET bottles in-line immediately before the heating and filling device. a. Since heat filling is performed immediately after molding as in the related art, there is no need to worry about adhesion of dust and various bacteria. b. There is no moisture absorption. Therefore, there is no worry about durability and filling trouble. c. No storage and transportation costs. d. Since the neck is formed thick and the cap is filled with the inner seal material, the neck (mouth) does not deform due to heat shrinkage at the time of hot pack and heat of the filling liquid at the time of lying down.

[Brief description of the drawings]

FIG. 1 is a flowchart of a heating and filling system according to the present invention.

FIG. 2 is an explanatory diagram of a neck and a cap.

FIG. 3 is an explanatory diagram of a moisture absorption rate of a polyethylene terephthalate plastic bottle over time.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 blow molding apparatus 2 preform reheating machine 3 blow molding machine 4 bottle accumulator 5 automatic filling device 6 rinser 7 filler 8 capper 9 neck 10 cap 11 inner seal material 12 palletizing device

Claims (5)

[Claims] 1. A heating device configured to perform blow molding of a PET bottle, hot-packing of a high-temperature liquid with respect to the molded PET bottle, and sterilization of a mouth portion and a cap of the PET bottle by lying down after the hot-packing in an inline manner. Filling system. 2. A preform reheating machine, a blow molding machine for molding a PET bottle using the reheated preform, and an automatic filling machine for filling the high temperature liquid in the blow molded PET bottle. A heating and filling system comprising: a capper for covering a cap on an automatically filled PET bottle; and a side-down heat sterilizer for disposing the PET bottle sideways and heat-sterilizing the mouth of the PET bottle and the inside of the cap. 3. The heating and filling system according to claim 2, wherein the PET bottle is molded using a cold parison type blow molding machine. 4. The heat filling system according to claim 2, wherein an automatic filling machine of a heat sterilization type hot fill system is used. 5. A PET bottle used for heat filling, wherein a thick neck is attached to a mouth of the PET bottle and an inner seal material is attached in a cap.