JP3240652B2 - Manufacturing method of a container with an all around body label - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001] The present invention relates to a method of manufacturing a container for affixing a label around the entire circumference.
Construction method .

[0002]

2. Description of the Related Art An all-around label attached to a glass container or a PET (polyethylene terephthalate) container has been applied by applying an aqueous paste to the back surface of printed paper and winding it around the container. However, paper labels are vulnerable to water, so labels around plastic films were required. However, since plastic films are difficult to bond with solvents and adhesives, generally printing is performed on the back of an OPP (biaxially oriented polypropylene) film, and an aqueous emulsion adhesive is applied to the surface of the label laminated with paper, and then easily applied. Although it is applied so as to be wound, it has a disadvantage that it takes time to dry. Labels printed on plastic films are bonded with a hot melt adhesive because it is difficult to bond them instantaneously with a solvent-based adhesive. But hot melt adhesives
To melt the resin and apply it to the film surface, the equipment becomes expensive, and the control of the coating amount requires advanced technology,
There is a need for an all-around plastic film label that can be instantaneously bonded simply by applying a solvent-based adhesive.

[0003]

SUMMARY OF THE INVENTION The present invention is to solve the above-mentioned conventional problems, and an object of the present invention is to print on a polyester film which can be instantaneously bonded with a solvent or a solvent-based adhesive. Take up the label in a roll, apply the solvent or solvent-based adhesive to part or the whole while continuously feeding it out, wrap it around the entire circumference of the container, and try to stick the label on the container continuously Things.

That is, the present invention relates to (1) a printed plastic
Step of winding the click film into a roll, the plastic film wound on (2) a roll
To extend over part or all of the plastic film
(3) A step of cutting a plastic film to a desired length
And (4) apply the cut plastic film to the body of the container.
Attaching a label around the entire body, including the mounting process in this order
A method for manufacturing a container, comprising:
Polymerized polyester film to the plastic film
And tetrahydrofuran, dioxane
Sun, methyl ethyl ketone, acetone, cyclohexano
Methylene chloride, chloroform, trichloroethylene
, Trichloroethane, benzene, toluene and acetic acid
At least one organic solvent selected from the group consisting of ethyl;
Adhesive or an adhesive using this organic solvent as a solvent
To be used as a label
This is a method for manufacturing a container .

[0005] The copolymerized polyester in the present invention is:
Polyester having a polyethylene terephthalate structure based on terephthalic acid and ethylene glycol, and dibasic acids such as isophthalic acid, phthalic acid, glutaric acid, adipic acid, sebacic acid, azelaic acid, dodecanedicarboxylic acid, cyclohexanedicarboxylic acid, and dimer acid. ,
As glycols, diethylene glycol, polyethylene glycol, propylene glycol, polypropylene glycol, butanediol, polybutylene glycol,
It is a copolymer of neopentyl glycol, cyclohexane dimethanol, an ethylene oxide adduct of a bisphenol derivative, and the like, and particularly preferably has a structure that dissolves or swells in a general-purpose organic solvent. As the copolymerized polyester, one type may be used, or two or more types may be blended and used. Further, it may be used by blending with a homopolyester such as polyethylene terephthalate.

The thickness of the polyester film in the present invention may be any thickness that can be wound around the entire circumference of the container, but a thickness of 10 μm to 100 μm is preferable because it is easy to use.

The polyester film of the present invention comprises:
It may be a single-layer structure composed of only the copolymerized polyester layer or a multilayered structure having the copolymerized polyester layer as a surface layer. In the case of a multilayer structure, only one surface may be the copolymerized polyester, or both surfaces may be the copolymerized polyester. In the case of a multilayer structure, a structure including a layer made of polyethylene terephthalate is particularly recommended in terms of mechanical properties and economy. That is, a multilayer structure in which a copolymer polyester layer is laminated on one side or both sides of a layer made of polyethylene terephthalate is particularly preferred.

The thickness of the copolymer layer in the case of a multilayer structure is not particularly limited, but is preferably 1 μm or more, more preferably 3 μm or more. The method for producing a film in the case of a multilayer structure is not particularly limited, but is preferably performed by a co-extrusion method.

[0009] The polyester film in the present invention may contain additives such as a lubricant, an antistatic agent, an ultraviolet absorber, a coloring agent, a foaming agent and a concealing agent, according to the purpose. As the polyethylene terephthalate used for the polyethylene terephthalate layer, a virgin resin may be used, or a recovered resin may be used.
Examples of the recovered resin include waste resin generated in a process of manufacturing fibers, films, and molded products using polyethylene terephthalate as a raw material, and a recovered resin obtained by recovering a PET bottle.

In the present invention, a uniaxially or biaxially stretched unstretched film formed by melt extrusion is used as the polyester film. Although unstretched film can be used, it is easy to cause color misalignment when performing multicolor printing because of high elongation, and there is a drawback that dimensional stability is poor when continuously attached as a label all around the container, It is desirable to use uniaxially or biaxially stretched films.

In the present invention, the solvent or adhesive used for bonding the copolyester film is tetrahydrofuran, dioxane, acetone, methyl ethyl ketone, cyclohexanone, methylene chloride, chloroform, trichloroethylene, trichloroethane, benzene, toluene, acetic acid. There is no particular limitation as long as it is at least one organic solvent selected from ethyl or an adhesive using the organic solvent as a solvent.

The copolymerized polyester film can be adhered to only the organic solvent. However, when it is necessary to improve the adhesive strength, a vinyl chloride copolymer or an acrylic ester may be used as an adhesive component. An adhesive obtained by dissolving a resin such as a copolymer, a vinyl acetate copolymer, polyester, polyurethane, polyamide, and epoxy in the organic solvent can be used.

The copolyester film is printed with a label pattern as required and wound up in a roll. The solvent or the adhesive is applied to part or all of the copolymerized polyester film so that the roll can be wound around the container while being unreeled, and the film is cut to the length of the container. , Affixed to the entire circumference of the container. This operation can be performed continuously.

The thickness of the solvent or adhesive applied during the film bonding process is not particularly limited, but is preferably as thin as possible from an economical point of view. Its thickness is 1.
0 μm or less is preferable, and 0.5 μm or less is more preferable. A major feature of the present invention is that the film can be instantaneously and firmly bonded by applying an extremely thin layer of a solvent or an adhesive as described above.

Next, the present invention will be described by way of examples.

[0016]

【Example】

Example 1 85 mol% of terephthalic acid, 15 mol% of isophthalic acid, 77 mol% of ethylene glycol, diethylene glycol 3
Mol% and 20 mol% of neopentyl glycol were melt-extruded into a polyester resin having a thickness of 120
It was formed into a μm transparent sheet. Next, this sheet was stretched four times in the vertical direction by a heating roll to form a uniaxially stretched polyester film having a thickness of 30 μm. This polyester film was slit to a width of 120 mm, and three-color printing of a label was performed on the back surface, and the resulting film was wound around a roll. While unrolling this roll, a glue margin of 1 every 290 mm
While applying tetrahydrofuran with a width of 0 mm to a thickness of 0.2 μm, cutting it with a length of 300 mm, and winding it around the body of a 1.5-liter PET bottle containing a carbonated beverage,
The glue was joined. The joining occurred instantaneously and the operation could be performed continuously, and the product could be shipped immediately. Also, when the bottle with this label is passed through a 160 ° C. heat tunnel for 10 seconds, the label shrinks,
It could be attached to the bottle more firmly. Conventionally, a 30 μm thick OPP film was slitted to a width of 120 mm, and a label printed on the back side in three colors was laminated with a 80 μm thick paper using a urethane-based adhesive.
This is wound up on a roll, and then an aqueous emulsion adhesive is applied to the entire surface of the paper while unwinding the roll,
They were cut to a length of 300 mm, wrapped around the body of a 1.5 liter PET bottle containing a carbonated beverage, and dried for 10 hours before shipment in order to increase the adhesive strength.

Example 2 A copolymer polyester comprising 95 mol% of terephthalic acid, 5 mol% of sebacic acid, 73 mol% of ethylene glycol, 3 mol% of diethylene glycol, and 24 mol% of neopentyl glycol was synthesized. A sheet having a three-layer structure including the copolymer polyester surface layer and polyethylene terephthalate as an intermediate layer was formed by a coextrusion method. The thickness of the copolymerized polyester layer was 80 μm for both upper and lower layers, and the thickness of polyethylene terephthalate was 440 μm. A transparent sheet having a total thickness of 600 μm was obtained. Next, this sheet was stretched 4 times in the vertical direction by a heating roll and 5 times in the horizontal direction by a tenter to obtain a biaxially stretched polyester film having a thickness of 30 μm. This co-extruded stretched polyester film was slit into a width of 120 mm, three-color printing was performed on the back surface of the co-extruded stretched polyester film, and the film was wound around a roll. While unrolling this roll, a glue margin of 1 every 290 mm
The adhesive was applied to a thickness of 0.2 μm with a width of 0 mm. The composition of the adhesive is obtained by dissolving 10% of Byron resin RV200 manufactured by Toyobo Co., Ltd. in a mixed solution of tetrahydrofuran / methyl ethyl ketone = 70/30 (volume ratio). Next, the pieces were cut into pieces each having a length of 300 mm, and the pieces were bonded to each other while being wound around the body of a 1.5-liter PET bottle containing a carbonated beverage. The joining occurred instantaneously and the operation could be performed continuously, and the product could be shipped immediately.

[0018]

As described above, the entire circumference of the copolyester film of the present invention can be easily and economically wound around a container and applied.

Claims (2)

(57) [Claims] (1) a step of winding a printed plastic film into a roll; (2) a step of feeding the plastic film wound into a roll and applying an adhesive to a part or the entire surface of the plastic film; 3) a step of cutting the plastic film to a desired length, and (4) a step of attaching the cut plastic film to the body of the container in this order, comprising: Using at least a uniaxially stretched copolymerized polyester film as the plastic film, and from the group consisting of tetrahydrofuran, dioxane, methyl ethyl ketone, acetone, cyclohexanone, methylene chloride, chloroform, trichloroethylene, trichloroethane, benzene, toluene and ethyl acetate Chosen A method for producing an all-around body-wound label sticking container, wherein at least one kind of organic solvent or an adhesive using this organic solvent as a solvent is used as the adhesive. 2. The method according to claim 1, wherein the copolymerized polyester film comprises a multilayer structure in which a polyethylene terephthalate layer is laminated on one or both sides of a polyethylene terephthalate layer.