JPH09286456A - Packaging body for preform, and packaging method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent plastic preforms from moving or shaking in a packaging material during conveyance or transportation, and to prevent damages at mouth stoppers causing in leakage of liquid and damages at trunk parts causing in deterioration of transparency, brilliance at the surface and to moldability by a method wherein the plastic preforms in a plurality of numbers are tied up firmly with a plastic filmlike packaging material. SOLUTION: A plurality of plastic preforms for being formed into bottles by means of biaxially oriented blow molding are tied up firmly with a plastic filmlike packaging material so that the preforms may not move individually in the packaging material, or wrapped up with a packaging material made of plastic heat shrinkable film and the packaging material is stuck to the preforms with the packaging material shrunk by heating, and the packaged preforms are housed in an outer case such as a corrugated board box. The plastic preform is a long cylindrical container having an opened mouth stopper part and suitably made from polyethylene terephthalate comprising of terephthalic acid and ethylene glycol.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plastic preform package and a method for packaging the same, and more particularly to a packaging form and a packaging form in which the preform does not easily move in a packaging material during transportation and transportation thereof. Regarding packaging method.

[0002]

2. Description of the Related Art Bottles obtained by biaxially stretch blow molding a thermoplastic polyester resin such as polyethylene terephthalate have excellent transparency and surface gloss, as well as mechanical properties such as impact resistance and rigidity, and gas barrier properties. It is widely used as a container for liquids such as soft drinks, soy sauce and oil.

A bottle as a liquid container is injection-molded with a thermoplastic polyester resin such as polyethylene terephthalate to produce a substantially amorphous bottomed preform, and the bottomed preform is preheated to a stretching temperature. After heating, this was placed in the cavity of the heated blow molding die, stretched in the longitudinal direction by a stretching rod, and blow-stretched in the longitudinal and transverse biaxial directions by the pressure of the blown high-pressure gas to form a bottle. The blow-stretched bottle is brought into contact with a cooled blow-molding die, fixed by cooling, and then taken out from the blow-molding die to be molded.

During this molding process, the bottles and preforms should be transferred with great care so as not to damage the outer surface of the bottles or preforms and impair their excellent transparency, surface gloss and mechanical properties. There is. In particular, if the outer surface of the preform, such as the upper edge of the spout (which is called the top surface) is damaged, it leads to leakage of the inner solution, causing serious defects, and when the body or bottom is damaged. In some cases, the transparency and surface gloss may be impaired to reduce the commercial value, and in the worst case, the bottle may not be favorably blow-molded in the vertical and horizontal biaxial directions and the bottle may have a poor appearance.

Therefore, when the step of injection molding the preform and the step of blow stretching the preform in the longitudinal and transverse biaxial directions are arranged at extremely short distances, the neck ring of the bottomed preform is attached. The preforms are transferred from the injection molding step to the blow stretching step by a conveying means such as a sandwiching conveyor or a pallet having a large number of locking rods vertically installed so that the preforms can be inserted upside down so as not to collide with each other.

If the transfer is long distance depending on the situation, another conveying means such as a plurality of bottomed preforms are arranged side by side in a corrugated cardboard box, and smooth or preform-shaped recesses are formed in the corrugated cardboard box. A method of arranging and accommodating in a plurality of stages with the formed bumpy buffer film interposed,
There has also been attempted a method of transferring a plurality of bottomed preforms by, for example, using a corrugated cardboard box in which a partitioning body that can be stored in an upright state is stored.

[0007]

However, when the transfer is performed over a long distance, the former method is such that a predetermined number of bottomed preforms are arranged side by side in a cardboard box and a smooth cushioning film is interposed therebetween. Since the films are stored in a multi-tiered arrangement, the film is flexible, so even if the preforms are packed in the cardboard box in an aligned state, the boxes will not be transferred during transportation or transfer of the cardboard box. It is unavoidable that the preforms repeatedly come into contact with each other due to movement or vibration, separation, collision, etc., and especially when the distance for transportation and transfer is long, damage to the outer surface is seen, and before the blow stretching process. It may be necessary to visually inspect all of them.

The method of interposing the uneven cushioning film into which the preform is fitted can prevent the occurrence of damage considerably compared to the case where the preform is stored as it is in a cardboard box. As a work procedure, preforms are arranged side by side, and a cushioning film is interposed to arrange them, so it is not necessary to take time and work and to reduce the capacity of the cardboard box. I can't.

Further, the latter method requires a partitioning body capable of accommodating a plurality of bottomed preforms in an upright state and a special corrugated cardboard box in which the partitioning body is placed, which reduces the capacity of the corrugated cardboard box. Since they are connected, the efficiency of transporting and transferring the bottomed preform is reduced, and the work is inevitably complicated as in the former case.

[0010]

SUMMARY OF THE INVENTION The present invention is a package in which preforms do not easily move or vibrate in the packaging material during their transportation and transfer, and the preforms are excellent in shape retention. A body and a packaging method thereof, the gist of which is a plurality of plastic preforms for forming a bottle by biaxial stretch blow molding, which are plastic film-like packaging materials, each preform being a packaging material. A preform package characterized by being tightened so as not to move with a plastic film-like wrapping material and a plurality of plastic preforms which are biaxially stretch blow molded into bottles. A preform package and a plastique, characterized in that a package that is tightened so that they do not move within the packaging material is stored in an outer box such as a cardboard box. A plurality of click-made preforms wrapped with packaging material made of plastic heat-shrinkable film,
A method for packaging a preform and a plurality of plastic preforms, characterized in that the packaging material is brought into close contact with a group of preforms by heat shrinkage and tightened so that the preforms do not move within the packaging material. It is characterized in that it is housed in a packaging material made of plastic film and sealed, and the air inside the packaging material is extracted and brought into close contact with the preform group so that the preforms do not move within the packaging material. And the preform packaging method.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be specifically described below.

The plastic preform of the present invention is
A long cylindrical container body having an open mouth plug portion and a substantially straight body portion and a semi-circular bottom portion connected to the mouth portion, and polyethylene terephthalate composed of terephthalic acid and ethylene glycol is preferable. However, other than this polybutylene terephthalate, polyethylene naphthalate and thermoplastic polyester copolymer, or by using a mixture of these, by a normal injection molding method, it is produced substantially amorphous, This is blow stretch-molded in the vertical and horizontal biaxial directions to form a bottle.

The plastic film-like packaging material of the present invention is formed by forming a thermoplastic resin into a film or a sheet (hereinafter, simply referred to as a film) by a thermoforming method and forming it into a packaging material such as a bag.

The plastic film of the present invention is a single-layer film or sheet (hereinafter referred to simply as film) of a thermoplastic resin such as polyvinyl chloride resin, polystyrene resin, polyester resin, or polyolefin resin such as polyethylene or polypropylene, or a high-quality film. It is a composite film having excellent gas barrier properties in which thermoplastic resins such as high density polyethylene resin, low density polyethylene resin, polyamide resin, polyimide resin, ethylene-vinyl acetate copolymer resin and ethylene vinyl alcohol copolymer resin are laminated.

In order to prevent deterioration due to ultraviolet rays, an ultraviolet absorber, a processing aid such as a lubricant or a heat stabilizer, and a pigment may be added for other purposes.

These thermoplastic resins are melted and extruded from a T-shaped die using a known extruder and are extruded by a T-die method of cooling with a cooling roll, an inflation method using an annular die, or a plurality of rolling rolls. Is formed into a film by a calendar method using

The composite film is formed by a dry laminating method, a hot melt laminating method, an extrusion laminating method, a coextrusion laminating method or the like.

The plastic heat-shrinkable film is uniaxially stretched in the transverse or longitudinal direction or biaxially in the longitudinal direction by a stretching method such as a tubular method or a tenter method using a resin such as polyethylene, polypropylene or vinyl chloride. 500μ, heating temperature 70 ℃ ~ 2
It is possible to use a film capable of being heat-shrinkable at a shrinkage ratio of 20 to 80%, preferably 40 to 80% in the longitudinal direction, the transverse direction, or the longitudinal and transverse directions depending on 00 ° C.

One or two sides of this plastic heat-shrinkable film are formed into a bag shape such as a gusset type or a pillow type by a heat fusion method such as an impulse sealing method, an impulse fusing sealing method, a high frequency sealing method or an ultrasonic sealing method. It is used as a packaging material, or as a packaging material with a tubular film having openings at both ends as it is, or as a container-shaped packaging material having a storage portion.

The packaging material used for the reduced pressure packaging is a film made of the above-mentioned thermoplastic resin, for example, a thickness of 30 to 50.
This film is formed into a bag-shaped packaging material by the above-mentioned heat fusion method using a 0 μ film, or is formed into a container-shaped packaging material having a storage portion by a deep drawing molding method or the like.

Further, a polyolefin resin or a soft polyvinyl chloride resin is formed into a raw material by an extrusion method such as a cyclic die method or a T-die method, or a calender method, and this is formed by a tubular method or a tenter method. It is possible to use a stretch film that is uniaxially stretched in the transverse or longitudinal direction or biaxially stretched in the longitudinal and transverse directions and can be stretched to the extent that it is not cut when an external force is applied, and returns to the original state when the external force is removed.

A plurality of preforms may be housed in a bag-shaped packaging material or a container-shaped packaging material, and the stretch film may be rolled from the outside and wrapped.

Further, a plurality of preforms may be arranged side by side, and the stretch film may be directly wound from the outside while being wrapped and wrapped.

As the bag-shaped packaging material, a plastic having a male body in the form of a ridge and a female body in the form of a groove into which the male body fits is provided at the opening edge portion for taking in and out the bottomed preform. For fasteners, bag-shaped packaging materials, container-shaped packaging materials,
An outer cylinder to which a vacuum pump is connected to bring the inside into a depressurized state, and an inner valve that is "open" when the inside of the bag-like packaging material is put into a depressurized state and "closed" when the inside is put into a depressurized state. It is preferable to install an air venting nozzle made of (1) because the workability is good.

The bag-shaped wrapping material is formed by using a generally known delivery roll and using a packing bag manufacturing apparatus for fusing and cutting, and intermittently cutting the leading end of a long tubular film. It is supplied on the fusion cutting table, and while pressing the heat-sealing blade while pressing the tip with the film pressing jig to form the closed portion of the bag by fusion, at the same time cut the vicinity of the closed portion with the cutting blade, Width 400-3000 mm, length 800-3
A bag-shaped packaging material of 000 mm is formed.

The container-shaped packaging material is molded by a generally known vacuum molding method, pressure molding method, or a molding method using vacuum and pressure in combination, when a heat-shrinkable packaging film is used. The molding temperature is as low as possible in order to maintain
m, length 400-1500 mm, depth 400-1500
mm packaging material is molded.

When a reduced pressure packaging film is used, the molding temperature is as high as possible so that it is not broken by the pressure reduction force, for example, a container-shaped packaging material of the same size as above is molded at a softening temperature or higher. .

Using this bag-shaped packaging material or container-shaped packaging material, a plurality of preforms are tightened so as not to move each other in the packaging material by using a heat-shrinkable packaging film bag. In the case of a sheet-shaped packaging material, after inserting a plurality of bottomed preforms from the opening, the opening is fusion-bonded by pressing a heat-sealing blade, and a closed portion is formed by closing with plastic fasteners or strings, etc. In that state, the film is passed through a shrink tunnel or the like and blown with hot air heated to 70 to 200 ° C. to shrink the heat-shrinkable packaging film and bring it into close contact with the preform.

Further, in the case of a bag-like packaging material or a container-like packaging material using a reduced pressure packaging film, after inserting a plurality of preforms through the openings, the openings are fused by pressing with a heat-sealing blade, plastic. A closed part is formed by closure with fasteners or strings, and in that state, the air inside is extracted by a vacuum pump or the like at a decompression degree of about 400 mmHg or less from the air vent nozzle that communicates with the storage part, and the decompression packaging film is pressed. After closely contacting the reform, the air vent nozzle is closed.

A plurality of the preforms may be film-like packaging materials, and the tightly packed packaging body may be directly transferred to a predetermined process so that the preforms do not move or vibrate in the packaging material. When the process is carried out over a relatively long distance, it is preferable to store one or more of these packages in an outer box such as a cardboard box or a plastic box.

Further, a plurality of preforms put in a bag-like packaging material is wrapped from the outside with a stretchable film, and stored in an outer box such as a cardboard box, a large container or a flexible container as needed. Alternatively, a plurality of preforms may be wrapped in a film-like wrapping material and stored in an outer box such as a cardboard box or a large-sized container with a built-in air bag on the side, and then the air bag is inflated. Then, the preforms may be tightened so that they do not move in the packaging material.

[0032]

Industrial Applicability According to the present invention, a plurality of plastic preforms for forming bottles by biaxial stretch blow molding are plastic film-like packaging materials so that the preforms do not move within the packaging material. Since it is a preform package characterized by being tightened to, in particular, a plastic preform such as a substantially non-crystalline thermoplastic polyester resin, whose outer surface is likely to be damaged by mutual collision or vibration, It is possible to obtain a package that does not easily move or vibrate in the packaging material during transportation / transportation, and that also has an excellent shape retention of the packaging, and a plug part that causes liquid leakage, It is possible to form a bottle that does not reduce the commercial value by preventing damage to the body or the like that impairs transparency, surface gloss, moldability, and the like.

Claims (4)

[Claims] 1. A plurality of plastic preforms for biaxially stretch blow molding into a bottle are tightly packed in a plastic film-like packaging material so that the preforms do not move within the packaging material. A preform package characterized by: 2. A package in which a plurality of plastic preforms that are biaxially stretch blow molded into a bottle are tightly packed in a plastic film-like packaging material so that the preforms do not move within the packaging material. A preform package characterized by storing the body in an outer box such as a cardboard box. 3. A plurality of plastic preforms are packaged with a packaging material made of a plastic heat-shrinkable film, and the packaging materials are heat-shrinked so as to be closely attached to the preform group, and the preforms are packaged with each other. A preform packaging method characterized by being tightened so as not to move inside. 4. A plurality of plastic preforms are housed in a packaging material made of a plastic film and hermetically sealed, and the air inside the packaging material is evacuated and closely adhered to a group of preforms so that the preforms are separated from each other. A preform packaging method characterized by tightening so as not to move within the packaging material.